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authorQt by Nokia <qt-info@nokia.com>2011-04-27 12:05:43 +0200
committeraxis <qt-info@nokia.com>2011-04-27 12:05:43 +0200
commit38be0d13830efd2d98281c645c3a60afe05ffece (patch)
tree6ea73f3ec77f7d153333779883e8120f82820abe /src/opengl
Initial import from the monolithic Qt.
This is the beginning of revision history for this module. If you want to look at revision history older than this, please refer to the Qt Git wiki for how to use Git history grafting. At the time of writing, this wiki is located here: http://qt.gitorious.org/qt/pages/GitIntroductionWithQt If you have already performed the grafting and you don't see any history beyond this commit, try running "git log" with the "--follow" argument. Branched from the monolithic repo, Qt master branch, at commit 896db169ea224deb96c59ce8af800d019de63f12
Diffstat (limited to 'src/opengl')
-rw-r--r--src/opengl/gl2paintengineex/qgl2pexvertexarray.cpp175
-rw-r--r--src/opengl/gl2paintengineex/qgl2pexvertexarray_p.h169
-rw-r--r--src/opengl/gl2paintengineex/qglcustomshaderstage.cpp138
-rw-r--r--src/opengl/gl2paintengineex/qglcustomshaderstage_p.h93
-rw-r--r--src/opengl/gl2paintengineex/qglengineshadermanager.cpp838
-rw-r--r--src/opengl/gl2paintengineex/qglengineshadermanager_p.h513
-rw-r--r--src/opengl/gl2paintengineex/qglengineshadersource_p.h519
-rw-r--r--src/opengl/gl2paintengineex/qglgradientcache.cpp206
-rw-r--r--src/opengl/gl2paintengineex/qglgradientcache_p.h98
-rw-r--r--src/opengl/gl2paintengineex/qglshadercache_meego_p.h457
-rw-r--r--src/opengl/gl2paintengineex/qglshadercache_p.h98
-rw-r--r--src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp2458
-rw-r--r--src/opengl/gl2paintengineex/qpaintengineex_opengl2_p.h332
-rw-r--r--src/opengl/gl2paintengineex/qtextureglyphcache_gl.cpp396
-rw-r--r--src/opengl/gl2paintengineex/qtextureglyphcache_gl_p.h166
-rw-r--r--src/opengl/gl2paintengineex/qtriangulatingstroker.cpp588
-rw-r--r--src/opengl/gl2paintengineex/qtriangulatingstroker_p.h157
-rw-r--r--src/opengl/gl2paintengineex/qtriangulator.cpp3114
-rw-r--r--src/opengl/gl2paintengineex/qtriangulator_p.h148
-rw-r--r--src/opengl/opengl.pro181
-rw-r--r--src/opengl/opengl.pro.user.2.1pre183
-rw-r--r--src/opengl/qgl.cpp6057
-rw-r--r--src/opengl/qgl.h668
-rw-r--r--src/opengl/qgl_egl.cpp351
-rw-r--r--src/opengl/qgl_egl_p.h69
-rw-r--r--src/opengl/qgl_mac.mm996
-rw-r--r--src/opengl/qgl_p.h903
-rw-r--r--src/opengl/qgl_qpa.cpp394
-rw-r--r--src/opengl/qgl_qws.cpp318
-rw-r--r--src/opengl/qgl_symbian.cpp472
-rw-r--r--src/opengl/qgl_win.cpp1601
-rw-r--r--src/opengl/qgl_wince.cpp636
-rw-r--r--src/opengl/qgl_x11.cpp1908
-rw-r--r--src/opengl/qgl_x11egl.cpp548
-rw-r--r--src/opengl/qglbuffer.cpp576
-rw-r--r--src/opengl/qglbuffer.h132
-rw-r--r--src/opengl/qglcolormap.cpp297
-rw-r--r--src/opengl/qglcolormap.h105
-rw-r--r--src/opengl/qglextensions.cpp430
-rw-r--r--src/opengl/qglextensions_p.h897
-rw-r--r--src/opengl/qglframebufferobject.cpp1398
-rw-r--r--src/opengl/qglframebufferobject.h180
-rw-r--r--src/opengl/qglframebufferobject_p.h161
-rw-r--r--src/opengl/qglfunctions.cpp3705
-rw-r--r--src/opengl/qglfunctions.h2295
-rw-r--r--src/opengl/qglpaintdevice.cpp246
-rw-r--r--src/opengl/qglpaintdevice_p.h115
-rw-r--r--src/opengl/qglpixelbuffer.cpp628
-rw-r--r--src/opengl/qglpixelbuffer.h122
-rw-r--r--src/opengl/qglpixelbuffer_egl.cpp224
-rw-r--r--src/opengl/qglpixelbuffer_mac.mm331
-rw-r--r--src/opengl/qglpixelbuffer_p.h209
-rw-r--r--src/opengl/qglpixelbuffer_stub.cpp84
-rw-r--r--src/opengl/qglpixelbuffer_win.cpp403
-rw-r--r--src/opengl/qglpixelbuffer_x11.cpp290
-rw-r--r--src/opengl/qglpixmapfilter.cpp621
-rw-r--r--src/opengl/qglpixmapfilter_p.h94
-rw-r--r--src/opengl/qglscreen_qws.cpp242
-rw-r--r--src/opengl/qglscreen_qws.h127
-rw-r--r--src/opengl/qglshaderprogram.cpp3354
-rw-r--r--src/opengl/qglshaderprogram.h344
-rw-r--r--src/opengl/qgltexturepool.cpp244
-rw-r--r--src/opengl/qgltexturepool_p.h147
-rw-r--r--src/opengl/qglwindowsurface_qws.cpp133
-rw-r--r--src/opengl/qglwindowsurface_qws_p.h90
-rw-r--r--src/opengl/qgraphicsshadereffect.cpp314
-rw-r--r--src/opengl/qgraphicsshadereffect_p.h94
-rw-r--r--src/opengl/qgraphicssystem_gl.cpp114
-rw-r--r--src/opengl/qgraphicssystem_gl_p.h80
-rw-r--r--src/opengl/qpaintengine_opengl.cpp5680
-rw-r--r--src/opengl/qpaintengine_opengl_p.h157
-rw-r--r--src/opengl/qpixmapdata_gl.cpp829
-rw-r--r--src/opengl/qpixmapdata_gl_p.h247
-rw-r--r--src/opengl/qpixmapdata_poolgl.cpp934
-rw-r--r--src/opengl/qpixmapdata_x11gl_egl.cpp403
-rw-r--r--src/opengl/qpixmapdata_x11gl_p.h98
-rw-r--r--src/opengl/qwindowsurface_gl.cpp1149
-rw-r--r--src/opengl/qwindowsurface_gl_p.h129
-rw-r--r--src/opengl/qwindowsurface_x11gl.cpp213
-rw-r--r--src/opengl/qwindowsurface_x11gl_p.h83
-rw-r--r--src/opengl/util/README-GLSL18
-rw-r--r--src/opengl/util/brush_painter.glsl7
-rw-r--r--src/opengl/util/brushes.conf6
-rw-r--r--src/opengl/util/composition_mode_colorburn.glsl13
-rw-r--r--src/opengl/util/composition_mode_colordodge.glsl15
-rw-r--r--src/opengl/util/composition_mode_darken.glsl9
-rw-r--r--src/opengl/util/composition_mode_difference.glsl9
-rw-r--r--src/opengl/util/composition_mode_exclusion.glsl9
-rw-r--r--src/opengl/util/composition_mode_hardlight.glsl14
-rw-r--r--src/opengl/util/composition_mode_lighten.glsl9
-rw-r--r--src/opengl/util/composition_mode_multiply.glsl9
-rw-r--r--src/opengl/util/composition_mode_overlay.glsl13
-rw-r--r--src/opengl/util/composition_mode_screen.glsl6
-rw-r--r--src/opengl/util/composition_mode_softlight.glsl22
-rw-r--r--src/opengl/util/composition_modes.conf12
-rw-r--r--src/opengl/util/conical_brush.glsl27
-rw-r--r--src/opengl/util/ellipse_aa.glsl58
-rw-r--r--src/opengl/util/fast_painter.glsl19
-rw-r--r--src/opengl/util/fragmentprograms_p.h7287
-rw-r--r--src/opengl/util/generator.cpp500
-rw-r--r--src/opengl/util/generator.pro13
-rwxr-xr-xsrc/opengl/util/glsl_to_include.sh73
-rw-r--r--src/opengl/util/linear_brush.glsl22
-rw-r--r--src/opengl/util/masks.conf2
-rw-r--r--src/opengl/util/meego/main.cpp89
-rw-r--r--src/opengl/util/meego/shader-cache-introspector.pro7
-rw-r--r--src/opengl/util/painter.glsl21
-rw-r--r--src/opengl/util/painter_nomask.glsl9
-rw-r--r--src/opengl/util/pattern_brush.glsl23
-rw-r--r--src/opengl/util/radial_brush.glsl28
-rw-r--r--src/opengl/util/simple_porter_duff.glsl16
-rw-r--r--src/opengl/util/solid_brush.glsl4
-rw-r--r--src/opengl/util/texture_brush.glsl21
-rw-r--r--src/opengl/util/trap_exact_aa.glsl58
114 files changed, 63044 insertions, 0 deletions
diff --git a/src/opengl/gl2paintengineex/qgl2pexvertexarray.cpp b/src/opengl/gl2paintengineex/qgl2pexvertexarray.cpp
new file mode 100644
index 0000000000..4677cc47b4
--- /dev/null
+++ b/src/opengl/gl2paintengineex/qgl2pexvertexarray.cpp
@@ -0,0 +1,175 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtOpenGL module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qgl2pexvertexarray_p.h"
+
+#include <private/qbezier_p.h>
+
+QT_BEGIN_NAMESPACE
+
+void QGL2PEXVertexArray::clear()
+{
+ vertexArray.reset();
+ vertexArrayStops.reset();
+ boundingRectDirty = true;
+}
+
+
+QGLRect QGL2PEXVertexArray::boundingRect() const
+{
+ if (boundingRectDirty)
+ return QGLRect(0.0, 0.0, 0.0, 0.0);
+ else
+ return QGLRect(minX, minY, maxX, maxY);
+}
+
+void QGL2PEXVertexArray::addClosingLine(int index)
+{
+ QPointF point(vertexArray.at(index));
+ if (point != QPointF(vertexArray.last()))
+ vertexArray.add(point);
+}
+
+void QGL2PEXVertexArray::addCentroid(const QVectorPath &path, int subPathIndex)
+{
+ const QPointF *const points = reinterpret_cast<const QPointF *>(path.points());
+ const QPainterPath::ElementType *const elements = path.elements();
+
+ QPointF sum = points[subPathIndex];
+ int count = 1;
+
+ for (int i = subPathIndex + 1; i < path.elementCount() && (!elements || elements[i] != QPainterPath::MoveToElement); ++i) {
+ sum += points[i];
+ ++count;
+ }
+
+ const QPointF centroid = sum / qreal(count);
+ vertexArray.add(centroid);
+}
+
+void QGL2PEXVertexArray::addPath(const QVectorPath &path, GLfloat curveInverseScale, bool outline)
+{
+ const QPointF* const points = reinterpret_cast<const QPointF*>(path.points());
+ const QPainterPath::ElementType* const elements = path.elements();
+
+ if (boundingRectDirty) {
+ minX = maxX = points[0].x();
+ minY = maxY = points[0].y();
+ boundingRectDirty = false;
+ }
+
+ if (!outline && !path.isConvex())
+ addCentroid(path, 0);
+
+ int lastMoveTo = vertexArray.size();
+ vertexArray.add(points[0]); // The first element is always a moveTo
+
+ do {
+ if (!elements) {
+// qDebug("QVectorPath has no elements");
+ // If the path has a null elements pointer, the elements implicitly
+ // start with a moveTo (already added) and continue with lineTos:
+ for (int i=1; i<path.elementCount(); ++i)
+ lineToArray(points[i].x(), points[i].y());
+
+ break;
+ }
+// qDebug("QVectorPath has element types");
+
+ for (int i=1; i<path.elementCount(); ++i) {
+ switch (elements[i]) {
+ case QPainterPath::MoveToElement:
+ if (!outline)
+ addClosingLine(lastMoveTo);
+// qDebug("element[%d] is a MoveToElement", i);
+ vertexArrayStops.add(vertexArray.size());
+ if (!outline) {
+ if (!path.isConvex()) addCentroid(path, i);
+ lastMoveTo = vertexArray.size();
+ }
+ lineToArray(points[i].x(), points[i].y()); // Add the moveTo as a new vertex
+ break;
+ case QPainterPath::LineToElement:
+// qDebug("element[%d] is a LineToElement", i);
+ lineToArray(points[i].x(), points[i].y());
+ break;
+ case QPainterPath::CurveToElement: {
+ QBezier b = QBezier::fromPoints(*(((const QPointF *) points) + i - 1),
+ points[i],
+ points[i+1],
+ points[i+2]);
+ QRectF bounds = b.bounds();
+ // threshold based on same algorithm as in qtriangulatingstroker.cpp
+ int threshold = qMin<float>(64, qMax(bounds.width(), bounds.height()) * 3.14f / (curveInverseScale * 6));
+ if (threshold < 3) threshold = 3;
+ qreal one_over_threshold_minus_1 = qreal(1) / (threshold - 1);
+ for (int t=0; t<threshold; ++t) {
+ QPointF pt = b.pointAt(t * one_over_threshold_minus_1);
+ lineToArray(pt.x(), pt.y());
+ }
+ i += 2;
+ break; }
+ default:
+ break;
+ }
+ }
+ } while (0);
+
+ if (!outline)
+ addClosingLine(lastMoveTo);
+ vertexArrayStops.add(vertexArray.size());
+}
+
+void QGL2PEXVertexArray::lineToArray(const GLfloat x, const GLfloat y)
+{
+ vertexArray.add(QGLPoint(x, y));
+
+ if (x > maxX)
+ maxX = x;
+ else if (x < minX)
+ minX = x;
+ if (y > maxY)
+ maxY = y;
+ else if (y < minY)
+ minY = y;
+}
+
+QT_END_NAMESPACE
diff --git a/src/opengl/gl2paintengineex/qgl2pexvertexarray_p.h b/src/opengl/gl2paintengineex/qgl2pexvertexarray_p.h
new file mode 100644
index 0000000000..99cd8d84b0
--- /dev/null
+++ b/src/opengl/gl2paintengineex/qgl2pexvertexarray_p.h
@@ -0,0 +1,169 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtOpenGL module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//
+// W A R N I N G
+// -------------
+//
+// This file is not part of the Qt API. It exists purely as an
+// implementation detail. This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#ifndef QGL2PEXVERTEXARRAY_P_H
+#define QGL2PEXVERTEXARRAY_P_H
+
+#include <QRectF>
+
+#include <private/qdatabuffer_p.h>
+#include <private/qvectorpath_p.h>
+#include <private/qgl_p.h>
+
+QT_BEGIN_NAMESPACE
+
+class QGLPoint
+{
+public:
+ QGLPoint(GLfloat new_x, GLfloat new_y) :
+ x(new_x), y(new_y) {};
+
+ QGLPoint(const QPointF &p) :
+ x(p.x()), y(p.y()) {};
+
+ QGLPoint(const QPointF* p) :
+ x(p->x()), y(p->y()) {};
+
+ GLfloat x;
+ GLfloat y;
+
+ operator QPointF() {return QPointF(x,y);}
+ operator QPointF() const {return QPointF(x,y);}
+};
+
+struct QGLRect
+{
+ QGLRect(const QRectF &r)
+ : left(r.left()), top(r.top()), right(r.right()), bottom(r.bottom()) {}
+
+ QGLRect(GLfloat l, GLfloat t, GLfloat r, GLfloat b)
+ : left(l), top(t), right(r), bottom(b) {}
+
+ GLfloat left;
+ GLfloat top;
+ GLfloat right;
+ GLfloat bottom;
+
+ operator QRectF() const {return QRectF(left, top, right-left, bottom-top);}
+};
+
+class QGL2PEXVertexArray
+{
+public:
+ QGL2PEXVertexArray() :
+ vertexArray(0), vertexArrayStops(0),
+ maxX(-2e10), maxY(-2e10), minX(2e10), minY(2e10),
+ boundingRectDirty(true)
+ { }
+
+ inline void addRect(const QRectF &rect)
+ {
+ qreal top = rect.top();
+ qreal left = rect.left();
+ qreal bottom = rect.bottom();
+ qreal right = rect.right();
+
+ vertexArray << QGLPoint(left, top)
+ << QGLPoint(right, top)
+ << QGLPoint(right, bottom)
+ << QGLPoint(right, bottom)
+ << QGLPoint(left, bottom)
+ << QGLPoint(left, top);
+ }
+
+ inline void addQuad(const QRectF &rect)
+ {
+ qreal top = rect.top();
+ qreal left = rect.left();
+ qreal bottom = rect.bottom();
+ qreal right = rect.right();
+
+ vertexArray << QGLPoint(left, top)
+ << QGLPoint(right, top)
+ << QGLPoint(left, bottom)
+ << QGLPoint(right, bottom);
+
+ }
+
+ inline void addVertex(const GLfloat x, const GLfloat y)
+ {
+ vertexArray.add(QGLPoint(x, y));
+ }
+
+ void addPath(const QVectorPath &path, GLfloat curveInverseScale, bool outline = true);
+ void clear();
+
+ QGLPoint* data() {return vertexArray.data();}
+ int *stops() const { return vertexArrayStops.data(); }
+ int stopCount() const { return vertexArrayStops.size(); }
+ QGLRect boundingRect() const;
+
+ int vertexCount() const { return vertexArray.size(); }
+
+ void lineToArray(const GLfloat x, const GLfloat y);
+
+private:
+ QDataBuffer<QGLPoint> vertexArray;
+ QDataBuffer<int> vertexArrayStops;
+
+ GLfloat maxX;
+ GLfloat maxY;
+ GLfloat minX;
+ GLfloat minY;
+ bool boundingRectDirty;
+ void addClosingLine(int index);
+ void addCentroid(const QVectorPath &path, int subPathIndex);
+};
+
+QT_END_NAMESPACE
+
+#endif
diff --git a/src/opengl/gl2paintengineex/qglcustomshaderstage.cpp b/src/opengl/gl2paintengineex/qglcustomshaderstage.cpp
new file mode 100644
index 0000000000..85f1ff257b
--- /dev/null
+++ b/src/opengl/gl2paintengineex/qglcustomshaderstage.cpp
@@ -0,0 +1,138 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtOpenGL module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qglcustomshaderstage_p.h"
+#include "qglengineshadermanager_p.h"
+#include "qpaintengineex_opengl2_p.h"
+#include <private/qpainter_p.h>
+
+QT_BEGIN_NAMESPACE
+
+class QGLCustomShaderStagePrivate
+{
+public:
+ QGLCustomShaderStagePrivate() :
+ m_manager(0) {}
+
+ QPointer<QGLEngineShaderManager> m_manager;
+ QByteArray m_source;
+};
+
+
+
+
+QGLCustomShaderStage::QGLCustomShaderStage()
+ : d_ptr(new QGLCustomShaderStagePrivate)
+{
+}
+
+QGLCustomShaderStage::~QGLCustomShaderStage()
+{
+ Q_D(QGLCustomShaderStage);
+ if (d->m_manager) {
+ d->m_manager->removeCustomStage();
+ d->m_manager->sharedShaders->cleanupCustomStage(this);
+ }
+}
+
+void QGLCustomShaderStage::setUniformsDirty()
+{
+ Q_D(QGLCustomShaderStage);
+ if (d->m_manager)
+ d->m_manager->setDirty(); // ### Probably a bit overkill!
+}
+
+bool QGLCustomShaderStage::setOnPainter(QPainter* p)
+{
+ Q_D(QGLCustomShaderStage);
+ if (p->paintEngine()->type() != QPaintEngine::OpenGL2) {
+ qWarning("QGLCustomShaderStage::setOnPainter() - paint engine not OpenGL2");
+ return false;
+ }
+ if (d->m_manager)
+ qWarning("Custom shader is already set on a painter");
+
+ QGL2PaintEngineEx *engine = static_cast<QGL2PaintEngineEx*>(p->paintEngine());
+ d->m_manager = QGL2PaintEngineExPrivate::shaderManagerForEngine(engine);
+ Q_ASSERT(d->m_manager);
+
+ d->m_manager->setCustomStage(this);
+ return true;
+}
+
+void QGLCustomShaderStage::removeFromPainter(QPainter* p)
+{
+ Q_D(QGLCustomShaderStage);
+ if (p->paintEngine()->type() != QPaintEngine::OpenGL2)
+ return;
+
+ QGL2PaintEngineEx *engine = static_cast<QGL2PaintEngineEx*>(p->paintEngine());
+ d->m_manager = QGL2PaintEngineExPrivate::shaderManagerForEngine(engine);
+ Q_ASSERT(d->m_manager);
+
+ // Just set the stage to null, don't call removeCustomStage().
+ // This should leave the program in a compiled/linked state
+ // if the next custom shader stage is this one again.
+ d->m_manager->setCustomStage(0);
+ d->m_manager = 0;
+}
+
+QByteArray QGLCustomShaderStage::source() const
+{
+ Q_D(const QGLCustomShaderStage);
+ return d->m_source;
+}
+
+// Called by the shader manager if another custom shader is attached or
+// the manager is deleted
+void QGLCustomShaderStage::setInactive()
+{
+ Q_D(QGLCustomShaderStage);
+ d->m_manager = 0;
+}
+
+void QGLCustomShaderStage::setSource(const QByteArray& s)
+{
+ Q_D(QGLCustomShaderStage);
+ d->m_source = s;
+}
+
+QT_END_NAMESPACE
diff --git a/src/opengl/gl2paintengineex/qglcustomshaderstage_p.h b/src/opengl/gl2paintengineex/qglcustomshaderstage_p.h
new file mode 100644
index 0000000000..2a7fc5dd09
--- /dev/null
+++ b/src/opengl/gl2paintengineex/qglcustomshaderstage_p.h
@@ -0,0 +1,93 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtOpenGL module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QGL_CUSTOM_SHADER_STAGE_H
+#define QGL_CUSTOM_SHADER_STAGE_H
+
+//
+// W A R N I N G
+// -------------
+//
+// This file is not part of the Qt API. It exists purely as an
+// implementation detail. This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QGLShaderProgram>
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+QT_MODULE(OpenGL)
+
+class QGLCustomShaderStagePrivate;
+class Q_OPENGL_EXPORT QGLCustomShaderStage
+{
+ Q_DECLARE_PRIVATE(QGLCustomShaderStage)
+public:
+ QGLCustomShaderStage();
+ virtual ~QGLCustomShaderStage();
+ virtual void setUniforms(QGLShaderProgram*) {}
+
+ void setUniformsDirty();
+
+ bool setOnPainter(QPainter*);
+ void removeFromPainter(QPainter*);
+ QByteArray source() const;
+
+ void setInactive();
+protected:
+ void setSource(const QByteArray&);
+
+private:
+ QGLCustomShaderStagePrivate* d_ptr;
+};
+
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+
+#endif
diff --git a/src/opengl/gl2paintengineex/qglengineshadermanager.cpp b/src/opengl/gl2paintengineex/qglengineshadermanager.cpp
new file mode 100644
index 0000000000..8068aa8524
--- /dev/null
+++ b/src/opengl/gl2paintengineex/qglengineshadermanager.cpp
@@ -0,0 +1,838 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtOpenGL module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qglengineshadermanager_p.h"
+#include "qglengineshadersource_p.h"
+#include "qpaintengineex_opengl2_p.h"
+#include "qglshadercache_p.h"
+
+#if defined(QT_DEBUG)
+#include <QMetaEnum>
+#endif
+
+// #define QT_GL_SHARED_SHADER_DEBUG
+
+QT_BEGIN_NAMESPACE
+
+class QGLShaderStorage
+{
+public:
+ QGLEngineSharedShaders *shadersForThread(const QGLContext *context) {
+ QGLContextGroupResource<QGLEngineSharedShaders> *&shaders = m_storage.localData();
+ if (!shaders)
+ shaders = new QGLContextGroupResource<QGLEngineSharedShaders>();
+ return shaders->value(context);
+ }
+
+private:
+ QThreadStorage<QGLContextGroupResource<QGLEngineSharedShaders> *> m_storage;
+};
+
+Q_GLOBAL_STATIC(QGLShaderStorage, qt_shader_storage);
+
+QGLEngineSharedShaders *QGLEngineSharedShaders::shadersForContext(const QGLContext *context)
+{
+ return qt_shader_storage()->shadersForThread(context);
+}
+
+const char* QGLEngineSharedShaders::qShaderSnippets[] = {
+ 0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0
+};
+
+QGLEngineSharedShaders::QGLEngineSharedShaders(const QGLContext* context)
+ : ctxGuard(context)
+ , blitShaderProg(0)
+ , simpleShaderProg(0)
+{
+
+/*
+ Rather than having the shader source array statically initialised, it is initialised
+ here instead. This is to allow new shader names to be inserted or existing names moved
+ around without having to change the order of the glsl strings. It is hoped this will
+ make future hard-to-find runtime bugs more obvious and generally give more solid code.
+*/
+ static bool snippetsPopulated = false;
+ if (!snippetsPopulated) {
+
+ const char** code = qShaderSnippets; // shortcut
+
+ code[MainVertexShader] = qglslMainVertexShader;
+ code[MainWithTexCoordsVertexShader] = qglslMainWithTexCoordsVertexShader;
+ code[MainWithTexCoordsAndOpacityVertexShader] = qglslMainWithTexCoordsAndOpacityVertexShader;
+
+ code[UntransformedPositionVertexShader] = qglslUntransformedPositionVertexShader;
+ code[PositionOnlyVertexShader] = qglslPositionOnlyVertexShader;
+ code[ComplexGeometryPositionOnlyVertexShader] = qglslComplexGeometryPositionOnlyVertexShader;
+ code[PositionWithPatternBrushVertexShader] = qglslPositionWithPatternBrushVertexShader;
+ code[PositionWithLinearGradientBrushVertexShader] = qglslPositionWithLinearGradientBrushVertexShader;
+ code[PositionWithConicalGradientBrushVertexShader] = qglslPositionWithConicalGradientBrushVertexShader;
+ code[PositionWithRadialGradientBrushVertexShader] = qglslPositionWithRadialGradientBrushVertexShader;
+ code[PositionWithTextureBrushVertexShader] = qglslPositionWithTextureBrushVertexShader;
+ code[AffinePositionWithPatternBrushVertexShader] = qglslAffinePositionWithPatternBrushVertexShader;
+ code[AffinePositionWithLinearGradientBrushVertexShader] = qglslAffinePositionWithLinearGradientBrushVertexShader;
+ code[AffinePositionWithConicalGradientBrushVertexShader] = qglslAffinePositionWithConicalGradientBrushVertexShader;
+ code[AffinePositionWithRadialGradientBrushVertexShader] = qglslAffinePositionWithRadialGradientBrushVertexShader;
+ code[AffinePositionWithTextureBrushVertexShader] = qglslAffinePositionWithTextureBrushVertexShader;
+
+ code[MainFragmentShader_CMO] = qglslMainFragmentShader_CMO;
+ code[MainFragmentShader_CM] = qglslMainFragmentShader_CM;
+ code[MainFragmentShader_MO] = qglslMainFragmentShader_MO;
+ code[MainFragmentShader_M] = qglslMainFragmentShader_M;
+ code[MainFragmentShader_CO] = qglslMainFragmentShader_CO;
+ code[MainFragmentShader_C] = qglslMainFragmentShader_C;
+ code[MainFragmentShader_O] = qglslMainFragmentShader_O;
+ code[MainFragmentShader] = qglslMainFragmentShader;
+ code[MainFragmentShader_ImageArrays] = qglslMainFragmentShader_ImageArrays;
+
+ code[ImageSrcFragmentShader] = qglslImageSrcFragmentShader;
+ code[ImageSrcWithPatternFragmentShader] = qglslImageSrcWithPatternFragmentShader;
+ code[NonPremultipliedImageSrcFragmentShader] = qglslNonPremultipliedImageSrcFragmentShader;
+ code[CustomImageSrcFragmentShader] = qglslCustomSrcFragmentShader; // Calls "customShader", which must be appended
+ code[SolidBrushSrcFragmentShader] = qglslSolidBrushSrcFragmentShader;
+ code[TextureBrushSrcFragmentShader] = qglslTextureBrushSrcFragmentShader;
+ code[TextureBrushSrcWithPatternFragmentShader] = qglslTextureBrushSrcWithPatternFragmentShader;
+ code[PatternBrushSrcFragmentShader] = qglslPatternBrushSrcFragmentShader;
+ code[LinearGradientBrushSrcFragmentShader] = qglslLinearGradientBrushSrcFragmentShader;
+ code[RadialGradientBrushSrcFragmentShader] = qglslRadialGradientBrushSrcFragmentShader;
+ code[ConicalGradientBrushSrcFragmentShader] = qglslConicalGradientBrushSrcFragmentShader;
+ code[ShockingPinkSrcFragmentShader] = qglslShockingPinkSrcFragmentShader;
+
+ code[NoMaskFragmentShader] = "";
+ code[MaskFragmentShader] = qglslMaskFragmentShader;
+ code[RgbMaskFragmentShaderPass1] = qglslRgbMaskFragmentShaderPass1;
+ code[RgbMaskFragmentShaderPass2] = qglslRgbMaskFragmentShaderPass2;
+ code[RgbMaskWithGammaFragmentShader] = ""; //###
+
+ code[NoCompositionModeFragmentShader] = "";
+ code[MultiplyCompositionModeFragmentShader] = ""; //###
+ code[ScreenCompositionModeFragmentShader] = ""; //###
+ code[OverlayCompositionModeFragmentShader] = ""; //###
+ code[DarkenCompositionModeFragmentShader] = ""; //###
+ code[LightenCompositionModeFragmentShader] = ""; //###
+ code[ColorDodgeCompositionModeFragmentShader] = ""; //###
+ code[ColorBurnCompositionModeFragmentShader] = ""; //###
+ code[HardLightCompositionModeFragmentShader] = ""; //###
+ code[SoftLightCompositionModeFragmentShader] = ""; //###
+ code[DifferenceCompositionModeFragmentShader] = ""; //###
+ code[ExclusionCompositionModeFragmentShader] = ""; //###
+
+#if defined(QT_DEBUG)
+ // Check that all the elements have been filled:
+ for (int i = 0; i < TotalSnippetCount; ++i) {
+ if (qShaderSnippets[i] == 0) {
+ qFatal("Shader snippet for %s (#%d) is missing!",
+ snippetNameStr(SnippetName(i)).constData(), i);
+ }
+ }
+#endif
+ snippetsPopulated = true;
+ }
+
+ QGLShader* fragShader;
+ QGLShader* vertexShader;
+ QByteArray vertexSource;
+ QByteArray fragSource;
+
+ // Compile up the simple shader:
+ vertexSource.append(qShaderSnippets[MainVertexShader]);
+ vertexSource.append(qShaderSnippets[PositionOnlyVertexShader]);
+
+ fragSource.append(qShaderSnippets[MainFragmentShader]);
+ fragSource.append(qShaderSnippets[ShockingPinkSrcFragmentShader]);
+
+ simpleShaderProg = new QGLShaderProgram(context, 0);
+
+ CachedShader simpleShaderCache(fragSource, vertexSource);
+
+ bool inCache = simpleShaderCache.load(simpleShaderProg, context);
+
+ if (!inCache) {
+ vertexShader = new QGLShader(QGLShader::Vertex, context, 0);
+ shaders.append(vertexShader);
+ if (!vertexShader->compileSourceCode(vertexSource))
+ qWarning("Vertex shader for simpleShaderProg (MainVertexShader & PositionOnlyVertexShader) failed to compile");
+
+ fragShader = new QGLShader(QGLShader::Fragment, context, 0);
+ shaders.append(fragShader);
+ if (!fragShader->compileSourceCode(fragSource))
+ qWarning("Fragment shader for simpleShaderProg (MainFragmentShader & ShockingPinkSrcFragmentShader) failed to compile");
+
+ simpleShaderProg->addShader(vertexShader);
+ simpleShaderProg->addShader(fragShader);
+
+ simpleShaderProg->bindAttributeLocation("vertexCoordsArray", QT_VERTEX_COORDS_ATTR);
+ simpleShaderProg->bindAttributeLocation("pmvMatrix1", QT_PMV_MATRIX_1_ATTR);
+ simpleShaderProg->bindAttributeLocation("pmvMatrix2", QT_PMV_MATRIX_2_ATTR);
+ simpleShaderProg->bindAttributeLocation("pmvMatrix3", QT_PMV_MATRIX_3_ATTR);
+ }
+
+ simpleShaderProg->link();
+
+ if (simpleShaderProg->isLinked()) {
+ if (!inCache)
+ simpleShaderCache.store(simpleShaderProg, context);
+ } else {
+ qCritical() << "Errors linking simple shader:"
+ << simpleShaderProg->log();
+ }
+
+ // Compile the blit shader:
+ vertexSource.clear();
+ vertexSource.append(qShaderSnippets[MainWithTexCoordsVertexShader]);
+ vertexSource.append(qShaderSnippets[UntransformedPositionVertexShader]);
+
+ fragSource.clear();
+ fragSource.append(qShaderSnippets[MainFragmentShader]);
+ fragSource.append(qShaderSnippets[ImageSrcFragmentShader]);
+
+ blitShaderProg = new QGLShaderProgram(context, 0);
+
+ CachedShader blitShaderCache(fragSource, vertexSource);
+
+ inCache = blitShaderCache.load(blitShaderProg, context);
+
+ if (!inCache) {
+ vertexShader = new QGLShader(QGLShader::Vertex, context, 0);
+ shaders.append(vertexShader);
+ if (!vertexShader->compileSourceCode(vertexSource))
+ qWarning("Vertex shader for blitShaderProg (MainWithTexCoordsVertexShader & UntransformedPositionVertexShader) failed to compile");
+
+ fragShader = new QGLShader(QGLShader::Fragment, context, 0);
+ shaders.append(fragShader);
+ if (!fragShader->compileSourceCode(fragSource))
+ qWarning("Fragment shader for blitShaderProg (MainFragmentShader & ImageSrcFragmentShader) failed to compile");
+
+ blitShaderProg->addShader(vertexShader);
+ blitShaderProg->addShader(fragShader);
+
+ blitShaderProg->bindAttributeLocation("textureCoordArray", QT_TEXTURE_COORDS_ATTR);
+ blitShaderProg->bindAttributeLocation("vertexCoordsArray", QT_VERTEX_COORDS_ATTR);
+ }
+
+ blitShaderProg->link();
+ if (blitShaderProg->isLinked()) {
+ if (!inCache)
+ blitShaderCache.store(blitShaderProg, context);
+ } else {
+ qCritical() << "Errors linking blit shader:"
+ << blitShaderProg->log();
+ }
+
+#ifdef QT_GL_SHARED_SHADER_DEBUG
+ qDebug(" -> QGLEngineSharedShaders() %p for thread %p.", this, QThread::currentThread());
+#endif
+}
+
+QGLEngineSharedShaders::~QGLEngineSharedShaders()
+{
+#ifdef QT_GL_SHARED_SHADER_DEBUG
+ qDebug(" -> ~QGLEngineSharedShaders() %p for thread %p.", this, QThread::currentThread());
+#endif
+ qDeleteAll(shaders);
+ shaders.clear();
+
+ qDeleteAll(cachedPrograms);
+ cachedPrograms.clear();
+
+ if (blitShaderProg) {
+ delete blitShaderProg;
+ blitShaderProg = 0;
+ }
+
+ if (simpleShaderProg) {
+ delete simpleShaderProg;
+ simpleShaderProg = 0;
+ }
+}
+
+#if defined (QT_DEBUG)
+QByteArray QGLEngineSharedShaders::snippetNameStr(SnippetName name)
+{
+ QMetaEnum m = staticMetaObject.enumerator(staticMetaObject.indexOfEnumerator("SnippetName"));
+ return QByteArray(m.valueToKey(name));
+}
+#endif
+
+// The address returned here will only be valid until next time this function is called.
+// The program is return bound.
+QGLEngineShaderProg *QGLEngineSharedShaders::findProgramInCache(const QGLEngineShaderProg &prog)
+{
+ for (int i = 0; i < cachedPrograms.size(); ++i) {
+ QGLEngineShaderProg *cachedProg = cachedPrograms[i];
+ if (*cachedProg == prog) {
+ // Move the program to the top of the list as a poor-man's cache algo
+ cachedPrograms.move(i, 0);
+ cachedProg->program->bind();
+ return cachedProg;
+ }
+ }
+
+ QScopedPointer<QGLEngineShaderProg> newProg;
+
+ do {
+ QByteArray fragSource;
+ // Insert the custom stage before the srcPixel shader to work around an ATI driver bug
+ // where you cannot forward declare a function that takes a sampler as argument.
+ if (prog.srcPixelFragShader == CustomImageSrcFragmentShader)
+ fragSource.append(prog.customStageSource);
+ fragSource.append(qShaderSnippets[prog.mainFragShader]);
+ fragSource.append(qShaderSnippets[prog.srcPixelFragShader]);
+ if (prog.compositionFragShader)
+ fragSource.append(qShaderSnippets[prog.compositionFragShader]);
+ if (prog.maskFragShader)
+ fragSource.append(qShaderSnippets[prog.maskFragShader]);
+
+ QByteArray vertexSource;
+ vertexSource.append(qShaderSnippets[prog.mainVertexShader]);
+ vertexSource.append(qShaderSnippets[prog.positionVertexShader]);
+
+ QScopedPointer<QGLShaderProgram> shaderProgram(new QGLShaderProgram(ctxGuard.context(), 0));
+
+ CachedShader shaderCache(fragSource, vertexSource);
+ bool inCache = shaderCache.load(shaderProgram.data(), ctxGuard.context());
+
+ if (!inCache) {
+
+ QScopedPointer<QGLShader> fragShader(new QGLShader(QGLShader::Fragment, ctxGuard.context(), 0));
+ QByteArray description;
+#if defined(QT_DEBUG)
+ // Name the shader for easier debugging
+ description.append("Fragment shader: main=");
+ description.append(snippetNameStr(prog.mainFragShader));
+ description.append(", srcPixel=");
+ description.append(snippetNameStr(prog.srcPixelFragShader));
+ if (prog.compositionFragShader) {
+ description.append(", composition=");
+ description.append(snippetNameStr(prog.compositionFragShader));
+ }
+ if (prog.maskFragShader) {
+ description.append(", mask=");
+ description.append(snippetNameStr(prog.maskFragShader));
+ }
+ fragShader->setObjectName(QString::fromLatin1(description));
+#endif
+ if (!fragShader->compileSourceCode(fragSource)) {
+ qWarning() << "Warning:" << description << "failed to compile!";
+ break;
+ }
+
+ QScopedPointer<QGLShader> vertexShader(new QGLShader(QGLShader::Vertex, ctxGuard.context(), 0));
+#if defined(QT_DEBUG)
+ // Name the shader for easier debugging
+ description.clear();
+ description.append("Vertex shader: main=");
+ description.append(snippetNameStr(prog.mainVertexShader));
+ description.append(", position=");
+ description.append(snippetNameStr(prog.positionVertexShader));
+ vertexShader->setObjectName(QString::fromLatin1(description));
+#endif
+ if (!vertexShader->compileSourceCode(vertexSource)) {
+ qWarning() << "Warning:" << description << "failed to compile!";
+ break;
+ }
+
+ shaders.append(vertexShader.data());
+ shaders.append(fragShader.data());
+ shaderProgram->addShader(vertexShader.take());
+ shaderProgram->addShader(fragShader.take());
+
+ // We have to bind the vertex attribute names before the program is linked:
+ shaderProgram->bindAttributeLocation("vertexCoordsArray", QT_VERTEX_COORDS_ATTR);
+ if (prog.useTextureCoords)
+ shaderProgram->bindAttributeLocation("textureCoordArray", QT_TEXTURE_COORDS_ATTR);
+ if (prog.useOpacityAttribute)
+ shaderProgram->bindAttributeLocation("opacityArray", QT_OPACITY_ATTR);
+ if (prog.usePmvMatrixAttribute) {
+ shaderProgram->bindAttributeLocation("pmvMatrix1", QT_PMV_MATRIX_1_ATTR);
+ shaderProgram->bindAttributeLocation("pmvMatrix2", QT_PMV_MATRIX_2_ATTR);
+ shaderProgram->bindAttributeLocation("pmvMatrix3", QT_PMV_MATRIX_3_ATTR);
+ }
+ }
+
+ newProg.reset(new QGLEngineShaderProg(prog));
+ newProg->program = shaderProgram.take();
+
+ newProg->program->link();
+ if (newProg->program->isLinked()) {
+ if (!inCache)
+ shaderCache.store(newProg->program, ctxGuard.context());
+ } else {
+ QLatin1String none("none");
+ QLatin1String br("\n");
+ QString error;
+ error = QLatin1String("Shader program failed to link,");
+#if defined(QT_DEBUG)
+ error += QLatin1String("\n Shaders Used:\n");
+ for (int i = 0; i < newProg->program->shaders().count(); ++i) {
+ QGLShader *shader = newProg->program->shaders().at(i);
+ error += QLatin1String(" ") + shader->objectName() + QLatin1String(": \n")
+ + QLatin1String(shader->sourceCode()) + br;
+ }
+#endif
+ error += QLatin1String(" Error Log:\n")
+ + QLatin1String(" ") + newProg->program->log();
+ qWarning() << error;
+ break;
+ }
+
+ newProg->program->bind();
+
+ if (newProg->maskFragShader != QGLEngineSharedShaders::NoMaskFragmentShader) {
+ GLuint location = newProg->program->uniformLocation("maskTexture");
+ newProg->program->setUniformValue(location, QT_MASK_TEXTURE_UNIT);
+ }
+
+ if (cachedPrograms.count() > 30) {
+ // The cache is full, so delete the last 5 programs in the list.
+ // These programs will be least used, as a program us bumped to
+ // the top of the list when it's used.
+ for (int i = 0; i < 5; ++i) {
+ delete cachedPrograms.last();
+ cachedPrograms.removeLast();
+ }
+ }
+
+ cachedPrograms.insert(0, newProg.data());
+ } while (false);
+
+ return newProg.take();
+}
+
+void QGLEngineSharedShaders::cleanupCustomStage(QGLCustomShaderStage* stage)
+{
+ // Remove any shader programs which has this as the custom shader src:
+ for (int i = 0; i < cachedPrograms.size(); ++i) {
+ QGLEngineShaderProg *cachedProg = cachedPrograms[i];
+ if (cachedProg->customStageSource == stage->source()) {
+ delete cachedProg;
+ cachedPrograms.removeAt(i);
+ i--;
+ }
+ }
+}
+
+
+QGLEngineShaderManager::QGLEngineShaderManager(QGLContext* context)
+ : ctx(context),
+ shaderProgNeedsChanging(true),
+ complexGeometry(false),
+ srcPixelType(Qt::NoBrush),
+ opacityMode(NoOpacity),
+ maskType(NoMask),
+ compositionMode(QPainter::CompositionMode_SourceOver),
+ customSrcStage(0),
+ currentShaderProg(0)
+{
+ sharedShaders = QGLEngineSharedShaders::shadersForContext(context);
+}
+
+QGLEngineShaderManager::~QGLEngineShaderManager()
+{
+ //###
+ removeCustomStage();
+}
+
+GLuint QGLEngineShaderManager::getUniformLocation(Uniform id)
+{
+ if (!currentShaderProg)
+ return 0;
+
+ QVector<uint> &uniformLocations = currentShaderProg->uniformLocations;
+ if (uniformLocations.isEmpty())
+ uniformLocations.fill(GLuint(-1), NumUniforms);
+
+ static const char *uniformNames[] = {
+ "imageTexture",
+ "patternColor",
+ "globalOpacity",
+ "depth",
+ "maskTexture",
+ "fragmentColor",
+ "linearData",
+ "angle",
+ "halfViewportSize",
+ "fmp",
+ "fmp2_m_radius2",
+ "inverse_2_fmp2_m_radius2",
+ "invertedTextureSize",
+ "brushTransform",
+ "brushTexture",
+ "matrix"
+ };
+
+ if (uniformLocations.at(id) == GLuint(-1))
+ uniformLocations[id] = currentShaderProg->program->uniformLocation(uniformNames[id]);
+
+ return uniformLocations.at(id);
+}
+
+
+void QGLEngineShaderManager::optimiseForBrushTransform(QTransform::TransformationType transformType)
+{
+ Q_UNUSED(transformType); // Currently ignored
+}
+
+void QGLEngineShaderManager::setDirty()
+{
+ shaderProgNeedsChanging = true;
+}
+
+void QGLEngineShaderManager::setSrcPixelType(Qt::BrushStyle style)
+{
+ Q_ASSERT(style != Qt::NoBrush);
+ if (srcPixelType == PixelSrcType(style))
+ return;
+
+ srcPixelType = style;
+ shaderProgNeedsChanging = true; //###
+}
+
+void QGLEngineShaderManager::setSrcPixelType(PixelSrcType type)
+{
+ if (srcPixelType == type)
+ return;
+
+ srcPixelType = type;
+ shaderProgNeedsChanging = true; //###
+}
+
+void QGLEngineShaderManager::setOpacityMode(OpacityMode mode)
+{
+ if (opacityMode == mode)
+ return;
+
+ opacityMode = mode;
+ shaderProgNeedsChanging = true; //###
+}
+
+void QGLEngineShaderManager::setMaskType(MaskType type)
+{
+ if (maskType == type)
+ return;
+
+ maskType = type;
+ shaderProgNeedsChanging = true; //###
+}
+
+void QGLEngineShaderManager::setCompositionMode(QPainter::CompositionMode mode)
+{
+ if (compositionMode == mode)
+ return;
+
+ compositionMode = mode;
+ shaderProgNeedsChanging = true; //###
+}
+
+void QGLEngineShaderManager::setCustomStage(QGLCustomShaderStage* stage)
+{
+ if (customSrcStage)
+ removeCustomStage();
+ customSrcStage = stage;
+ shaderProgNeedsChanging = true;
+}
+
+void QGLEngineShaderManager::removeCustomStage()
+{
+ if (customSrcStage)
+ customSrcStage->setInactive();
+ customSrcStage = 0;
+ shaderProgNeedsChanging = true;
+}
+
+QGLShaderProgram* QGLEngineShaderManager::currentProgram()
+{
+ if (currentShaderProg)
+ return currentShaderProg->program;
+ else
+ return sharedShaders->simpleProgram();
+}
+
+void QGLEngineShaderManager::useSimpleProgram()
+{
+ sharedShaders->simpleProgram()->bind();
+ QGLContextPrivate* ctx_d = ctx->d_func();
+ ctx_d->setVertexAttribArrayEnabled(QT_VERTEX_COORDS_ATTR, true);
+ ctx_d->setVertexAttribArrayEnabled(QT_TEXTURE_COORDS_ATTR, false);
+ ctx_d->setVertexAttribArrayEnabled(QT_OPACITY_ATTR, false);
+ shaderProgNeedsChanging = true;
+}
+
+void QGLEngineShaderManager::useBlitProgram()
+{
+ sharedShaders->blitProgram()->bind();
+ QGLContextPrivate* ctx_d = ctx->d_func();
+ ctx_d->setVertexAttribArrayEnabled(QT_VERTEX_COORDS_ATTR, true);
+ ctx_d->setVertexAttribArrayEnabled(QT_TEXTURE_COORDS_ATTR, true);
+ ctx_d->setVertexAttribArrayEnabled(QT_OPACITY_ATTR, false);
+ shaderProgNeedsChanging = true;
+}
+
+QGLShaderProgram* QGLEngineShaderManager::simpleProgram()
+{
+ return sharedShaders->simpleProgram();
+}
+
+QGLShaderProgram* QGLEngineShaderManager::blitProgram()
+{
+ return sharedShaders->blitProgram();
+}
+
+
+
+// Select & use the correct shader program using the current state.
+// Returns true if program needed changing.
+bool QGLEngineShaderManager::useCorrectShaderProg()
+{
+ if (!shaderProgNeedsChanging)
+ return false;
+
+ bool useCustomSrc = customSrcStage != 0;
+ if (useCustomSrc && srcPixelType != QGLEngineShaderManager::ImageSrc && srcPixelType != Qt::TexturePattern) {
+ useCustomSrc = false;
+ qWarning("QGLEngineShaderManager - Ignoring custom shader stage for non image src");
+ }
+
+ QGLEngineShaderProg requiredProgram;
+
+ bool texCoords = false;
+
+ // Choose vertex shader shader position function (which typically also sets
+ // varyings) and the source pixel (srcPixel) fragment shader function:
+ requiredProgram.positionVertexShader = QGLEngineSharedShaders::InvalidSnippetName;
+ requiredProgram.srcPixelFragShader = QGLEngineSharedShaders::InvalidSnippetName;
+ bool isAffine = brushTransform.isAffine();
+ if ( (srcPixelType >= Qt::Dense1Pattern) && (srcPixelType <= Qt::DiagCrossPattern) ) {
+ if (isAffine)
+ requiredProgram.positionVertexShader = QGLEngineSharedShaders::AffinePositionWithPatternBrushVertexShader;
+ else
+ requiredProgram.positionVertexShader = QGLEngineSharedShaders::PositionWithPatternBrushVertexShader;
+
+ requiredProgram.srcPixelFragShader = QGLEngineSharedShaders::PatternBrushSrcFragmentShader;
+ }
+ else switch (srcPixelType) {
+ default:
+ case Qt::NoBrush:
+ qFatal("QGLEngineShaderManager::useCorrectShaderProg() - Qt::NoBrush style is set");
+ break;
+ case QGLEngineShaderManager::ImageSrc:
+ requiredProgram.srcPixelFragShader = QGLEngineSharedShaders::ImageSrcFragmentShader;
+ requiredProgram.positionVertexShader = QGLEngineSharedShaders::PositionOnlyVertexShader;
+ texCoords = true;
+ break;
+ case QGLEngineShaderManager::NonPremultipliedImageSrc:
+ requiredProgram.srcPixelFragShader = QGLEngineSharedShaders::NonPremultipliedImageSrcFragmentShader;
+ requiredProgram.positionVertexShader = QGLEngineSharedShaders::PositionOnlyVertexShader;
+ texCoords = true;
+ break;
+ case QGLEngineShaderManager::PatternSrc:
+ requiredProgram.srcPixelFragShader = QGLEngineSharedShaders::ImageSrcWithPatternFragmentShader;
+ requiredProgram.positionVertexShader = QGLEngineSharedShaders::PositionOnlyVertexShader;
+ texCoords = true;
+ break;
+ case QGLEngineShaderManager::TextureSrcWithPattern:
+ requiredProgram.srcPixelFragShader = QGLEngineSharedShaders::TextureBrushSrcWithPatternFragmentShader;
+ requiredProgram.positionVertexShader = isAffine ? QGLEngineSharedShaders::AffinePositionWithTextureBrushVertexShader
+ : QGLEngineSharedShaders::PositionWithTextureBrushVertexShader;
+ break;
+ case Qt::SolidPattern:
+ requiredProgram.srcPixelFragShader = QGLEngineSharedShaders::SolidBrushSrcFragmentShader;
+ requiredProgram.positionVertexShader = QGLEngineSharedShaders::PositionOnlyVertexShader;
+ break;
+ case Qt::LinearGradientPattern:
+ requiredProgram.srcPixelFragShader = QGLEngineSharedShaders::LinearGradientBrushSrcFragmentShader;
+ requiredProgram.positionVertexShader = isAffine ? QGLEngineSharedShaders::AffinePositionWithLinearGradientBrushVertexShader
+ : QGLEngineSharedShaders::PositionWithLinearGradientBrushVertexShader;
+ break;
+ case Qt::ConicalGradientPattern:
+ requiredProgram.srcPixelFragShader = QGLEngineSharedShaders::ConicalGradientBrushSrcFragmentShader;
+ requiredProgram.positionVertexShader = isAffine ? QGLEngineSharedShaders::AffinePositionWithConicalGradientBrushVertexShader
+ : QGLEngineSharedShaders::PositionWithConicalGradientBrushVertexShader;
+ break;
+ case Qt::RadialGradientPattern:
+ requiredProgram.srcPixelFragShader = QGLEngineSharedShaders::RadialGradientBrushSrcFragmentShader;
+ requiredProgram.positionVertexShader = isAffine ? QGLEngineSharedShaders::AffinePositionWithRadialGradientBrushVertexShader
+ : QGLEngineSharedShaders::PositionWithRadialGradientBrushVertexShader;
+ break;
+ case Qt::TexturePattern:
+ requiredProgram.srcPixelFragShader = QGLEngineSharedShaders::TextureBrushSrcFragmentShader;
+ requiredProgram.positionVertexShader = isAffine ? QGLEngineSharedShaders::AffinePositionWithTextureBrushVertexShader
+ : QGLEngineSharedShaders::PositionWithTextureBrushVertexShader;
+ break;
+ };
+
+ if (useCustomSrc) {
+ requiredProgram.srcPixelFragShader = QGLEngineSharedShaders::CustomImageSrcFragmentShader;
+ requiredProgram.customStageSource = customSrcStage->source();
+ }
+
+ const bool hasCompose = compositionMode > QPainter::CompositionMode_Plus;
+ const bool hasMask = maskType != QGLEngineShaderManager::NoMask;
+
+ // Choose fragment shader main function:
+ if (opacityMode == AttributeOpacity) {
+ Q_ASSERT(!hasCompose && !hasMask);
+ requiredProgram.mainFragShader = QGLEngineSharedShaders::MainFragmentShader_ImageArrays;
+ } else {
+ bool useGlobalOpacity = (opacityMode == UniformOpacity);
+ if (hasCompose && hasMask && useGlobalOpacity)
+ requiredProgram.mainFragShader = QGLEngineSharedShaders::MainFragmentShader_CMO;
+ if (hasCompose && hasMask && !useGlobalOpacity)
+ requiredProgram.mainFragShader = QGLEngineSharedShaders::MainFragmentShader_CM;
+ if (!hasCompose && hasMask && useGlobalOpacity)
+ requiredProgram.mainFragShader = QGLEngineSharedShaders::MainFragmentShader_MO;
+ if (!hasCompose && hasMask && !useGlobalOpacity)
+ requiredProgram.mainFragShader = QGLEngineSharedShaders::MainFragmentShader_M;
+ if (hasCompose && !hasMask && useGlobalOpacity)
+ requiredProgram.mainFragShader = QGLEngineSharedShaders::MainFragmentShader_CO;
+ if (hasCompose && !hasMask && !useGlobalOpacity)
+ requiredProgram.mainFragShader = QGLEngineSharedShaders::MainFragmentShader_C;
+ if (!hasCompose && !hasMask && useGlobalOpacity)
+ requiredProgram.mainFragShader = QGLEngineSharedShaders::MainFragmentShader_O;
+ if (!hasCompose && !hasMask && !useGlobalOpacity)
+ requiredProgram.mainFragShader = QGLEngineSharedShaders::MainFragmentShader;
+ }
+
+ if (hasMask) {
+ if (maskType == PixelMask) {
+ requiredProgram.maskFragShader = QGLEngineSharedShaders::MaskFragmentShader;
+ texCoords = true;
+ } else if (maskType == SubPixelMaskPass1) {
+ requiredProgram.maskFragShader = QGLEngineSharedShaders::RgbMaskFragmentShaderPass1;
+ texCoords = true;
+ } else if (maskType == SubPixelMaskPass2) {
+ requiredProgram.maskFragShader = QGLEngineSharedShaders::RgbMaskFragmentShaderPass2;
+ texCoords = true;
+ } else if (maskType == SubPixelWithGammaMask) {
+ requiredProgram.maskFragShader = QGLEngineSharedShaders::RgbMaskWithGammaFragmentShader;
+ texCoords = true;
+ } else {
+ qCritical("QGLEngineShaderManager::useCorrectShaderProg() - Unknown mask type");
+ }
+ } else {
+ requiredProgram.maskFragShader = QGLEngineSharedShaders::NoMaskFragmentShader;
+ }
+
+ if (hasCompose) {
+ switch (compositionMode) {
+ case QPainter::CompositionMode_Multiply:
+ requiredProgram.compositionFragShader = QGLEngineSharedShaders::MultiplyCompositionModeFragmentShader;
+ break;
+ case QPainter::CompositionMode_Screen:
+ requiredProgram.compositionFragShader = QGLEngineSharedShaders::ScreenCompositionModeFragmentShader;
+ break;
+ case QPainter::CompositionMode_Overlay:
+ requiredProgram.compositionFragShader = QGLEngineSharedShaders::OverlayCompositionModeFragmentShader;
+ break;
+ case QPainter::CompositionMode_Darken:
+ requiredProgram.compositionFragShader = QGLEngineSharedShaders::DarkenCompositionModeFragmentShader;
+ break;
+ case QPainter::CompositionMode_Lighten:
+ requiredProgram.compositionFragShader = QGLEngineSharedShaders::LightenCompositionModeFragmentShader;
+ break;
+ case QPainter::CompositionMode_ColorDodge:
+ requiredProgram.compositionFragShader = QGLEngineSharedShaders::ColorDodgeCompositionModeFragmentShader;
+ break;
+ case QPainter::CompositionMode_ColorBurn:
+ requiredProgram.compositionFragShader = QGLEngineSharedShaders::ColorBurnCompositionModeFragmentShader;
+ break;
+ case QPainter::CompositionMode_HardLight:
+ requiredProgram.compositionFragShader = QGLEngineSharedShaders::HardLightCompositionModeFragmentShader;
+ break;
+ case QPainter::CompositionMode_SoftLight:
+ requiredProgram.compositionFragShader = QGLEngineSharedShaders::SoftLightCompositionModeFragmentShader;
+ break;
+ case QPainter::CompositionMode_Difference:
+ requiredProgram.compositionFragShader = QGLEngineSharedShaders::DifferenceCompositionModeFragmentShader;
+ break;
+ case QPainter::CompositionMode_Exclusion:
+ requiredProgram.compositionFragShader = QGLEngineSharedShaders::ExclusionCompositionModeFragmentShader;
+ break;
+ default:
+ qWarning("QGLEngineShaderManager::useCorrectShaderProg() - Unsupported composition mode");
+ }
+ } else {
+ requiredProgram.compositionFragShader = QGLEngineSharedShaders::NoCompositionModeFragmentShader;
+ }
+
+ // Choose vertex shader main function
+ if (opacityMode == AttributeOpacity) {
+ Q_ASSERT(texCoords);
+ requiredProgram.mainVertexShader = QGLEngineSharedShaders::MainWithTexCoordsAndOpacityVertexShader;
+ } else if (texCoords) {
+ requiredProgram.mainVertexShader = QGLEngineSharedShaders::MainWithTexCoordsVertexShader;
+ } else {
+ requiredProgram.mainVertexShader = QGLEngineSharedShaders::MainVertexShader;
+ }
+ requiredProgram.useTextureCoords = texCoords;
+ requiredProgram.useOpacityAttribute = (opacityMode == AttributeOpacity);
+ if (complexGeometry && srcPixelType == Qt::SolidPattern) {
+ requiredProgram.positionVertexShader = QGLEngineSharedShaders::ComplexGeometryPositionOnlyVertexShader;
+ requiredProgram.usePmvMatrixAttribute = false;
+ } else {
+ requiredProgram.usePmvMatrixAttribute = true;
+
+ // Force complexGeometry off, since we currently don't support that mode for
+ // non-solid brushes
+ complexGeometry = false;
+ }
+
+ // At this point, requiredProgram is fully populated so try to find the program in the cache
+ currentShaderProg = sharedShaders->findProgramInCache(requiredProgram);
+
+ if (currentShaderProg && useCustomSrc) {
+ customSrcStage->setUniforms(currentShaderProg->program);
+ }
+
+ // Make sure all the vertex attribute arrays the program uses are enabled (and the ones it
+ // doesn't use are disabled)
+ QGLContextPrivate* ctx_d = ctx->d_func();
+ ctx_d->setVertexAttribArrayEnabled(QT_VERTEX_COORDS_ATTR, true);
+ ctx_d->setVertexAttribArrayEnabled(QT_TEXTURE_COORDS_ATTR, currentShaderProg && currentShaderProg->useTextureCoords);
+ ctx_d->setVertexAttribArrayEnabled(QT_OPACITY_ATTR, currentShaderProg && currentShaderProg->useOpacityAttribute);
+
+ shaderProgNeedsChanging = false;
+ return true;
+}
+
+QT_END_NAMESPACE
diff --git a/src/opengl/gl2paintengineex/qglengineshadermanager_p.h b/src/opengl/gl2paintengineex/qglengineshadermanager_p.h
new file mode 100644
index 0000000000..7cc9dc3bd4
--- /dev/null
+++ b/src/opengl/gl2paintengineex/qglengineshadermanager_p.h
@@ -0,0 +1,513 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtOpenGL module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//
+// W A R N I N G
+// -------------
+//
+// This file is not part of the Qt API. It exists purely as an
+// implementation detail. This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+/*
+ VERTEX SHADERS
+ ==============
+
+ Vertex shaders are specified as multiple (partial) shaders. On desktop,
+ this works fine. On ES, QGLShader & QGLShaderProgram will make partial
+ shaders work by concatenating the source in each QGLShader and compiling
+ it as a single shader. This is abstracted nicely by QGLShaderProgram and
+ the GL2 engine doesn't need to worry about it.
+
+ Generally, there's two vertex shader objects. The position shaders are
+ the ones which set gl_Position. There's also two "main" vertex shaders,
+ one which just calls the position shader and another which also passes
+ through some texture coordinates from a vertex attribute array to a
+ varying. These texture coordinates are used for mask position in text
+ rendering and for the source coordinates in drawImage/drawPixmap. There's
+ also a "Simple" vertex shader for rendering a solid colour (used to render
+ into the stencil buffer where the actual colour value is discarded).
+
+ The position shaders for brushes look scary. This is because many of the
+ calculations which logically belong in the fragment shader have been moved
+ into the vertex shader to improve performance. This is why the position
+ calculation is in a separate shader. Not only does it calculate the
+ position, but it also calculates some data to be passed to the fragment
+ shader as a varying. It is optimal to move as much of the calculation as
+ possible into the vertex shader as this is executed less often.
+
+ The varyings passed to the fragment shaders are interpolated (which is
+ cheap). Unfortunately, GL will apply perspective correction to the
+ interpolation calusing errors. To get around this, the vertex shader must
+ apply perspective correction itself and set the w-value of gl_Position to
+ zero. That way, GL will be tricked into thinking it doesn't need to apply a
+ perspective correction and use linear interpolation instead (which is what
+ we want). Of course, if the brush transform is affeine, no perspective
+ correction is needed and a simpler vertex shader can be used instead.
+
+ So there are the following "main" vertex shaders:
+ qglslMainVertexShader
+ qglslMainWithTexCoordsVertexShader
+
+ And the the following position vertex shaders:
+ qglslPositionOnlyVertexShader
+ qglslPositionWithTextureBrushVertexShader
+ qglslPositionWithPatternBrushVertexShader
+ qglslPositionWithLinearGradientBrushVertexShader
+ qglslPositionWithRadialGradientBrushVertexShader
+ qglslPositionWithConicalGradientBrushVertexShader
+ qglslAffinePositionWithTextureBrushVertexShader
+ qglslAffinePositionWithPatternBrushVertexShader
+ qglslAffinePositionWithLinearGradientBrushVertexShader
+ qglslAffinePositionWithRadialGradientBrushVertexShader
+ qglslAffinePositionWithConicalGradientBrushVertexShader
+
+ Leading to 23 possible vertex shaders
+
+
+ FRAGMENT SHADERS
+ ================
+
+ Fragment shaders are also specified as multiple (partial) shaders. The
+ different fragment shaders represent the different stages in Qt's fragment
+ pipeline. There are 1-3 stages in this pipeline: First stage is to get the
+ fragment's colour value. The next stage is to get the fragment's mask value
+ (coverage value for anti-aliasing) and the final stage is to blend the
+ incoming fragment with the background (for composition modes not supported
+ by GL).
+
+ Of these, the first stage will always be present. If Qt doesn't need to
+ apply anti-aliasing (because it's off or handled by multisampling) then
+ the coverage value doesn't need to be applied. (Note: There are two types
+ of mask, one for regular anti-aliasing and one for sub-pixel anti-
+ aliasing.) If the composition mode is one which GL supports natively then
+ the blending stage doesn't need to be applied.
+
+ As eash stage can have multiple implementations, they are abstracted as
+ GLSL function calls with the following signatures:
+
+ Brushes & image drawing are implementations of "qcolorp vec4 srcPixel()":
+ qglslImageSrcFragShader
+ qglslImageSrcWithPatternFragShader
+ qglslNonPremultipliedImageSrcFragShader
+ qglslSolidBrushSrcFragShader
+ qglslTextureBrushSrcFragShader
+ qglslTextureBrushWithPatternFragShader
+ qglslPatternBrushSrcFragShader
+ qglslLinearGradientBrushSrcFragShader
+ qglslRadialGradientBrushSrcFragShader
+ qglslConicalGradientBrushSrcFragShader
+ NOTE: It is assumed the colour returned by srcPixel() is pre-multiplied
+
+ Masks are implementations of "qcolorp vec4 applyMask(qcolorp vec4 src)":
+ qglslMaskFragmentShader
+ qglslRgbMaskFragmentShaderPass1
+ qglslRgbMaskFragmentShaderPass2
+ qglslRgbMaskWithGammaFragmentShader
+
+ Composition modes are "qcolorp vec4 compose(qcolorp vec4 src)":
+ qglslColorBurnCompositionModeFragmentShader
+ qglslColorDodgeCompositionModeFragmentShader
+ qglslDarkenCompositionModeFragmentShader
+ qglslDifferenceCompositionModeFragmentShader
+ qglslExclusionCompositionModeFragmentShader
+ qglslHardLightCompositionModeFragmentShader
+ qglslLightenCompositionModeFragmentShader
+ qglslMultiplyCompositionModeFragmentShader
+ qglslOverlayCompositionModeFragmentShader
+ qglslScreenCompositionModeFragmentShader
+ qglslSoftLightCompositionModeFragmentShader
+
+
+ Note: In the future, some GLSL compilers will support an extension allowing
+ a new 'color' precision specifier. To support this, qcolorp is used for
+ all color components so it can be defined to colorp or lowp depending upon
+ the implementation.
+
+ So there are differnt frament shader main functions, depending on the
+ number & type of pipelines the fragment needs to go through.
+
+ The choice of which main() fragment shader string to use depends on:
+ - Use of global opacity
+ - Brush style (some brushes apply opacity themselves)
+ - Use & type of mask (TODO: Need to support high quality anti-aliasing & text)
+ - Use of non-GL Composition mode
+
+ Leading to the following fragment shader main functions:
+ gl_FragColor = compose(applyMask(srcPixel()*globalOpacity));
+ gl_FragColor = compose(applyMask(srcPixel()));
+ gl_FragColor = applyMask(srcPixel()*globalOpacity);
+ gl_FragColor = applyMask(srcPixel());
+ gl_FragColor = compose(srcPixel()*globalOpacity);
+ gl_FragColor = compose(srcPixel());
+ gl_FragColor = srcPixel()*globalOpacity;
+ gl_FragColor = srcPixel();
+
+ Called:
+ qglslMainFragmentShader_CMO
+ qglslMainFragmentShader_CM
+ qglslMainFragmentShader_MO
+ qglslMainFragmentShader_M
+ qglslMainFragmentShader_CO
+ qglslMainFragmentShader_C
+ qglslMainFragmentShader_O
+ qglslMainFragmentShader
+
+ Where:
+ M = Mask
+ C = Composition
+ O = Global Opacity
+
+
+ CUSTOM SHADER CODE
+ ==================
+
+ The use of custom shader code is supported by the engine for drawImage and
+ drawPixmap calls. This is implemented via hooks in the fragment pipeline.
+
+ The custom shader is passed to the engine as a partial fragment shader
+ (QGLCustomShaderStage). The shader will implement a pre-defined method name
+ which Qt's fragment pipeline will call:
+
+ lowp vec4 customShader(lowp sampler2d imageTexture, highp vec2 textureCoords)
+
+ The provided src and srcCoords parameters can be used to sample from the
+ source image.
+
+ Transformations, clipping, opacity, and composition modes set using QPainter
+ will be respected when using the custom shader hook.
+*/
+
+#ifndef QGLENGINE_SHADER_MANAGER_H
+#define QGLENGINE_SHADER_MANAGER_H
+
+#include <QGLShader>
+#include <QGLShaderProgram>
+#include <QPainter>
+#include <private/qgl_p.h>
+#include <private/qglcustomshaderstage_p.h>
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+QT_MODULE(OpenGL)
+
+
+/*
+struct QGLEngineCachedShaderProg
+{
+ QGLEngineCachedShaderProg(QGLEngineShaderManager::ShaderName vertexMain,
+ QGLEngineShaderManager::ShaderName vertexPosition,
+ QGLEngineShaderManager::ShaderName fragMain,
+ QGLEngineShaderManager::ShaderName pixelSrc,
+ QGLEngineShaderManager::ShaderName mask,
+ QGLEngineShaderManager::ShaderName composition);
+
+ int cacheKey;
+ QGLShaderProgram* program;
+}
+*/
+
+static const GLuint QT_VERTEX_COORDS_ATTR = 0;
+static const GLuint QT_TEXTURE_COORDS_ATTR = 1;
+static const GLuint QT_OPACITY_ATTR = 2;
+static const GLuint QT_PMV_MATRIX_1_ATTR = 3;
+static const GLuint QT_PMV_MATRIX_2_ATTR = 4;
+static const GLuint QT_PMV_MATRIX_3_ATTR = 5;
+
+class QGLEngineShaderProg;
+
+class Q_OPENGL_EXPORT QGLEngineSharedShaders
+{
+ Q_GADGET
+public:
+
+ enum SnippetName {
+ MainVertexShader,
+ MainWithTexCoordsVertexShader,
+ MainWithTexCoordsAndOpacityVertexShader,
+
+ // UntransformedPositionVertexShader must be first in the list:
+ UntransformedPositionVertexShader,
+ PositionOnlyVertexShader,
+ ComplexGeometryPositionOnlyVertexShader,
+ PositionWithPatternBrushVertexShader,
+ PositionWithLinearGradientBrushVertexShader,
+ PositionWithConicalGradientBrushVertexShader,
+ PositionWithRadialGradientBrushVertexShader,
+ PositionWithTextureBrushVertexShader,
+ AffinePositionWithPatternBrushVertexShader,
+ AffinePositionWithLinearGradientBrushVertexShader,
+ AffinePositionWithConicalGradientBrushVertexShader,
+ AffinePositionWithRadialGradientBrushVertexShader,
+ AffinePositionWithTextureBrushVertexShader,
+
+ // MainFragmentShader_CMO must be first in the list:
+ MainFragmentShader_CMO,
+ MainFragmentShader_CM,
+ MainFragmentShader_MO,
+ MainFragmentShader_M,
+ MainFragmentShader_CO,
+ MainFragmentShader_C,
+ MainFragmentShader_O,
+ MainFragmentShader,
+ MainFragmentShader_ImageArrays,
+
+ // ImageSrcFragmentShader must be first in the list::
+ ImageSrcFragmentShader,
+ ImageSrcWithPatternFragmentShader,
+ NonPremultipliedImageSrcFragmentShader,
+ CustomImageSrcFragmentShader,
+ SolidBrushSrcFragmentShader,
+ TextureBrushSrcFragmentShader,
+ TextureBrushSrcWithPatternFragmentShader,
+ PatternBrushSrcFragmentShader,
+ LinearGradientBrushSrcFragmentShader,
+ RadialGradientBrushSrcFragmentShader,
+ ConicalGradientBrushSrcFragmentShader,
+ ShockingPinkSrcFragmentShader,
+
+ // NoMaskFragmentShader must be first in the list:
+ NoMaskFragmentShader,
+ MaskFragmentShader,
+ RgbMaskFragmentShaderPass1,
+ RgbMaskFragmentShaderPass2,
+ RgbMaskWithGammaFragmentShader,
+
+ // NoCompositionModeFragmentShader must be first in the list:
+ NoCompositionModeFragmentShader,
+ MultiplyCompositionModeFragmentShader,
+ ScreenCompositionModeFragmentShader,
+ OverlayCompositionModeFragmentShader,
+ DarkenCompositionModeFragmentShader,
+ LightenCompositionModeFragmentShader,
+ ColorDodgeCompositionModeFragmentShader,
+ ColorBurnCompositionModeFragmentShader,
+ HardLightCompositionModeFragmentShader,
+ SoftLightCompositionModeFragmentShader,
+ DifferenceCompositionModeFragmentShader,
+ ExclusionCompositionModeFragmentShader,
+
+ TotalSnippetCount, InvalidSnippetName
+ };
+#if defined (QT_DEBUG)
+ Q_ENUMS(SnippetName)
+ static QByteArray snippetNameStr(SnippetName snippetName);
+#endif
+
+/*
+ // These allow the ShaderName enum to be used as a cache key
+ const int mainVertexOffset = 0;
+ const int positionVertexOffset = (1<<2) - PositionOnlyVertexShader;
+ const int mainFragOffset = (1<<6) - MainFragmentShader_CMO;
+ const int srcPixelOffset = (1<<10) - ImageSrcFragmentShader;
+ const int maskOffset = (1<<14) - NoMaskShader;
+ const int compositionOffset = (1 << 16) - MultiplyCompositionModeFragmentShader;
+*/
+
+ QGLEngineSharedShaders(const QGLContext *context);
+ ~QGLEngineSharedShaders();
+
+ QGLShaderProgram *simpleProgram() { return simpleShaderProg; }
+ QGLShaderProgram *blitProgram() { return blitShaderProg; }
+ // Compile the program if it's not already in the cache, return the item in the cache.
+ QGLEngineShaderProg *findProgramInCache(const QGLEngineShaderProg &prog);
+ // Compile the custom shader if it's not already in the cache, return the item in the cache.
+
+ static QGLEngineSharedShaders *shadersForContext(const QGLContext *context);
+
+ // Ideally, this would be static and cleanup all programs in all contexts which
+ // contain the custom code. Currently it is just a hint and we rely on deleted
+ // custom shaders being cleaned up by being kicked out of the cache when it's
+ // full.
+ void cleanupCustomStage(QGLCustomShaderStage* stage);
+
+private:
+ QGLSharedResourceGuard ctxGuard;
+ QGLShaderProgram *blitShaderProg;
+ QGLShaderProgram *simpleShaderProg;
+ QList<QGLEngineShaderProg*> cachedPrograms;
+ QList<QGLShader *> shaders;
+
+ static const char* qShaderSnippets[TotalSnippetCount];
+};
+
+
+class QGLEngineShaderProg
+{
+public:
+ QGLEngineShaderProg() : program(0) {}
+
+ ~QGLEngineShaderProg() {
+ if (program)
+ delete program;
+ }
+
+ QGLEngineSharedShaders::SnippetName mainVertexShader;
+ QGLEngineSharedShaders::SnippetName positionVertexShader;
+ QGLEngineSharedShaders::SnippetName mainFragShader;
+ QGLEngineSharedShaders::SnippetName srcPixelFragShader;
+ QGLEngineSharedShaders::SnippetName maskFragShader;
+ QGLEngineSharedShaders::SnippetName compositionFragShader;
+
+ QByteArray customStageSource; //TODO: Decent cache key for custom stages
+ QGLShaderProgram* program;
+
+ QVector<uint> uniformLocations;
+
+ bool useTextureCoords;
+ bool useOpacityAttribute;
+ bool usePmvMatrixAttribute;
+
+ bool operator==(const QGLEngineShaderProg& other) {
+ // We don't care about the program
+ return ( mainVertexShader == other.mainVertexShader &&
+ positionVertexShader == other.positionVertexShader &&
+ mainFragShader == other.mainFragShader &&
+ srcPixelFragShader == other.srcPixelFragShader &&
+ maskFragShader == other.maskFragShader &&
+ compositionFragShader == other.compositionFragShader &&
+ customStageSource == other.customStageSource
+ );
+ }
+};
+
+class Q_OPENGL_EXPORT QGLEngineShaderManager : public QObject
+{
+ Q_OBJECT
+public:
+ QGLEngineShaderManager(QGLContext* context);
+ ~QGLEngineShaderManager();
+
+ enum MaskType {NoMask, PixelMask, SubPixelMaskPass1, SubPixelMaskPass2, SubPixelWithGammaMask};
+ enum PixelSrcType {
+ ImageSrc = Qt::TexturePattern+1,
+ NonPremultipliedImageSrc = Qt::TexturePattern+2,
+ PatternSrc = Qt::TexturePattern+3,
+ TextureSrcWithPattern = Qt::TexturePattern+4
+ };
+
+ enum Uniform {
+ ImageTexture,
+ PatternColor,
+ GlobalOpacity,
+ Depth,
+ MaskTexture,
+ FragmentColor,
+ LinearData,
+ Angle,
+ HalfViewportSize,
+ Fmp,
+ Fmp2MRadius2,
+ Inverse2Fmp2MRadius2,
+ InvertedTextureSize,
+ BrushTransform,
+ BrushTexture,
+ Matrix,
+ NumUniforms
+ };
+
+ enum OpacityMode {
+ NoOpacity,
+ UniformOpacity,
+ AttributeOpacity
+ };
+
+ // There are optimizations we can do, depending on the brush transform:
+ // 1) May not have to apply perspective-correction
+ // 2) Can use lower precision for matrix
+ void optimiseForBrushTransform(QTransform::TransformationType transformType);
+ void setSrcPixelType(Qt::BrushStyle);
+ void setSrcPixelType(PixelSrcType); // For non-brush sources, like pixmaps & images
+ void setOpacityMode(OpacityMode);
+ void setMaskType(MaskType);
+ void setCompositionMode(QPainter::CompositionMode);
+ void setCustomStage(QGLCustomShaderStage* stage);
+ void removeCustomStage();
+
+ GLuint getUniformLocation(Uniform id);
+
+ void setDirty(); // someone has manually changed the current shader program
+ bool useCorrectShaderProg(); // returns true if the shader program needed to be changed
+
+ void useSimpleProgram();
+ void useBlitProgram();
+ void setHasComplexGeometry(bool hasComplexGeometry)
+ {
+ complexGeometry = hasComplexGeometry;
+ shaderProgNeedsChanging = true;
+ }
+ bool hasComplexGeometry() const
+ {
+ return complexGeometry;
+ }
+
+ QGLShaderProgram* currentProgram(); // Returns pointer to the shader the manager has chosen
+ QGLShaderProgram* simpleProgram(); // Used to draw into e.g. stencil buffers
+ QGLShaderProgram* blitProgram(); // Used to blit a texture into the framebuffer
+
+ QGLEngineSharedShaders* sharedShaders;
+
+private:
+ QGLContext* ctx;
+ bool shaderProgNeedsChanging;
+ bool complexGeometry;
+
+ // Current state variables which influence the choice of shader:
+ QTransform brushTransform;
+ int srcPixelType;
+ OpacityMode opacityMode;
+ MaskType maskType;
+ QPainter::CompositionMode compositionMode;
+ QGLCustomShaderStage* customSrcStage;
+
+ QGLEngineShaderProg* currentShaderProg;
+};
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif //QGLENGINE_SHADER_MANAGER_H
diff --git a/src/opengl/gl2paintengineex/qglengineshadersource_p.h b/src/opengl/gl2paintengineex/qglengineshadersource_p.h
new file mode 100644
index 0000000000..fc8b9ef4db
--- /dev/null
+++ b/src/opengl/gl2paintengineex/qglengineshadersource_p.h
@@ -0,0 +1,519 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtOpenGL module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//
+// W A R N I N G
+// -------------
+//
+// This file is not part of the Qt API. It exists purely as an
+// implementation detail. This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+
+#ifndef QGL_ENGINE_SHADER_SOURCE_H
+#define QGL_ENGINE_SHADER_SOURCE_H
+
+#include "qglengineshadermanager_p.h"
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+QT_MODULE(OpenGL)
+
+
+static const char* const qglslMainVertexShader = "\n\
+ void setPosition(); \n\
+ void main(void) \n\
+ { \n\
+ setPosition(); \n\
+ }\n";
+
+static const char* const qglslMainWithTexCoordsVertexShader = "\n\
+ attribute highp vec2 textureCoordArray; \n\
+ varying highp vec2 textureCoords; \n\
+ void setPosition(); \n\
+ void main(void) \n\
+ { \n\
+ setPosition(); \n\
+ textureCoords = textureCoordArray; \n\
+ }\n";
+
+static const char* const qglslMainWithTexCoordsAndOpacityVertexShader = "\n\
+ attribute highp vec2 textureCoordArray; \n\
+ attribute lowp float opacityArray; \n\
+ varying highp vec2 textureCoords; \n\
+ varying lowp float opacity; \n\
+ void setPosition(); \n\
+ void main(void) \n\
+ { \n\
+ setPosition(); \n\
+ textureCoords = textureCoordArray; \n\
+ opacity = opacityArray; \n\
+ }\n";
+
+// NOTE: We let GL do the perspective correction so texture lookups in the fragment
+// shader are also perspective corrected.
+static const char* const qglslPositionOnlyVertexShader = "\n\
+ attribute highp vec2 vertexCoordsArray; \n\
+ attribute highp vec3 pmvMatrix1; \n\
+ attribute highp vec3 pmvMatrix2; \n\
+ attribute highp vec3 pmvMatrix3; \n\
+ void setPosition(void) \n\
+ { \n\
+ highp mat3 pmvMatrix = mat3(pmvMatrix1, pmvMatrix2, pmvMatrix3); \n\
+ vec3 transformedPos = pmvMatrix * vec3(vertexCoordsArray.xy, 1.0); \n\
+ gl_Position = vec4(transformedPos.xy, 0.0, transformedPos.z); \n\
+ }\n";
+
+static const char* const qglslComplexGeometryPositionOnlyVertexShader = "\n\
+ uniform highp mat3 matrix; \n\
+ attribute highp vec2 vertexCoordsArray; \n\
+ void setPosition(void) \n\
+ { \n\
+ gl_Position = vec4(matrix * vec3(vertexCoordsArray, 1), 1);\n\
+ } \n";
+
+static const char* const qglslUntransformedPositionVertexShader = "\n\
+ attribute highp vec4 vertexCoordsArray; \n\
+ void setPosition(void) \n\
+ { \n\
+ gl_Position = vertexCoordsArray; \n\
+ }\n";
+
+// Pattern Brush - This assumes the texture size is 8x8 and thus, the inverted size is 0.125
+static const char* const qglslPositionWithPatternBrushVertexShader = "\n\
+ attribute highp vec2 vertexCoordsArray; \n\
+ attribute highp vec3 pmvMatrix1; \n\
+ attribute highp vec3 pmvMatrix2; \n\
+ attribute highp vec3 pmvMatrix3; \n\
+ uniform mediump vec2 halfViewportSize; \n\
+ uniform highp vec2 invertedTextureSize; \n\
+ uniform highp mat3 brushTransform; \n\
+ varying highp vec2 patternTexCoords; \n\
+ void setPosition(void) \n\
+ { \n\
+ highp mat3 pmvMatrix = mat3(pmvMatrix1, pmvMatrix2, pmvMatrix3); \n\
+ vec3 transformedPos = pmvMatrix * vec3(vertexCoordsArray.xy, 1.0); \n\
+ gl_Position.xy = transformedPos.xy / transformedPos.z; \n\
+ mediump vec2 viewportCoords = (gl_Position.xy + 1.0) * halfViewportSize; \n\
+ mediump vec3 hTexCoords = brushTransform * vec3(viewportCoords, 1.0); \n\
+ mediump float invertedHTexCoordsZ = 1.0 / hTexCoords.z; \n\
+ gl_Position = vec4(gl_Position.xy * invertedHTexCoordsZ, 0.0, invertedHTexCoordsZ); \n\
+ patternTexCoords.xy = (hTexCoords.xy * 0.125) * invertedHTexCoordsZ; \n\
+ }\n";
+
+static const char* const qglslAffinePositionWithPatternBrushVertexShader
+ = qglslPositionWithPatternBrushVertexShader;
+
+static const char* const qglslPatternBrushSrcFragmentShader = "\n\
+ uniform sampler2D brushTexture; \n\
+ uniform lowp vec4 patternColor; \n\
+ varying highp vec2 patternTexCoords;\n\
+ lowp vec4 srcPixel() \n\
+ { \n\
+ return patternColor * (1.0 - texture2D(brushTexture, patternTexCoords).r); \n\
+ }\n";
+
+
+// Linear Gradient Brush
+static const char* const qglslPositionWithLinearGradientBrushVertexShader = "\n\
+ attribute highp vec2 vertexCoordsArray; \n\
+ attribute highp vec3 pmvMatrix1; \n\
+ attribute highp vec3 pmvMatrix2; \n\
+ attribute highp vec3 pmvMatrix3; \n\
+ uniform mediump vec2 halfViewportSize; \n\
+ uniform highp vec3 linearData; \n\
+ uniform highp mat3 brushTransform; \n\
+ varying mediump float index; \n\
+ void setPosition() \n\
+ { \n\
+ highp mat3 pmvMatrix = mat3(pmvMatrix1, pmvMatrix2, pmvMatrix3); \n\
+ vec3 transformedPos = pmvMatrix * vec3(vertexCoordsArray.xy, 1.0); \n\
+ gl_Position.xy = transformedPos.xy / transformedPos.z; \n\
+ mediump vec2 viewportCoords = (gl_Position.xy + 1.0) * halfViewportSize; \n\
+ mediump vec3 hTexCoords = brushTransform * vec3(viewportCoords, 1); \n\
+ mediump float invertedHTexCoordsZ = 1.0 / hTexCoords.z; \n\
+ gl_Position = vec4(gl_Position.xy * invertedHTexCoordsZ, 0.0, invertedHTexCoordsZ); \n\
+ index = (dot(linearData.xy, hTexCoords.xy) * linearData.z) * invertedHTexCoordsZ; \n\
+ }\n";
+
+static const char* const qglslAffinePositionWithLinearGradientBrushVertexShader
+ = qglslPositionWithLinearGradientBrushVertexShader;
+
+static const char* const qglslLinearGradientBrushSrcFragmentShader = "\n\
+ uniform sampler2D brushTexture; \n\
+ varying mediump float index; \n\
+ lowp vec4 srcPixel() \n\
+ { \n\
+ mediump vec2 val = vec2(index, 0.5); \n\
+ return texture2D(brushTexture, val); \n\
+ }\n";
+
+
+// Conical Gradient Brush
+static const char* const qglslPositionWithConicalGradientBrushVertexShader = "\n\
+ attribute highp vec2 vertexCoordsArray; \n\
+ attribute highp vec3 pmvMatrix1; \n\
+ attribute highp vec3 pmvMatrix2; \n\
+ attribute highp vec3 pmvMatrix3; \n\
+ uniform mediump vec2 halfViewportSize; \n\
+ uniform highp mat3 brushTransform; \n\
+ varying highp vec2 A; \n\
+ void setPosition(void) \n\
+ { \n\
+ highp mat3 pmvMatrix = mat3(pmvMatrix1, pmvMatrix2, pmvMatrix3); \n\
+ vec3 transformedPos = pmvMatrix * vec3(vertexCoordsArray.xy, 1.0); \n\
+ gl_Position.xy = transformedPos.xy / transformedPos.z; \n\
+ mediump vec2 viewportCoords = (gl_Position.xy + 1.0) * halfViewportSize; \n\
+ mediump vec3 hTexCoords = brushTransform * vec3(viewportCoords, 1); \n\
+ mediump float invertedHTexCoordsZ = 1.0 / hTexCoords.z; \n\
+ gl_Position = vec4(gl_Position.xy * invertedHTexCoordsZ, 0.0, invertedHTexCoordsZ); \n\
+ A = hTexCoords.xy * invertedHTexCoordsZ; \n\
+ }\n";
+
+static const char* const qglslAffinePositionWithConicalGradientBrushVertexShader
+ = qglslPositionWithConicalGradientBrushVertexShader;
+
+static const char* const qglslConicalGradientBrushSrcFragmentShader = "\n\
+ #define INVERSE_2PI 0.1591549430918953358 \n\
+ uniform sampler2D brushTexture; \n\
+ uniform mediump float angle; \n\
+ varying highp vec2 A; \n\
+ lowp vec4 srcPixel() \n\
+ { \n\
+ highp float t; \n\
+ if (abs(A.y) == abs(A.x)) \n\
+ t = (atan(-A.y + 0.002, A.x) + angle) * INVERSE_2PI; \n\
+ else \n\
+ t = (atan(-A.y, A.x) + angle) * INVERSE_2PI; \n\
+ return texture2D(brushTexture, vec2(t - floor(t), 0.5)); \n\
+ }\n";
+
+
+// Radial Gradient Brush
+static const char* const qglslPositionWithRadialGradientBrushVertexShader = "\n\
+ attribute highp vec2 vertexCoordsArray;\n\
+ attribute highp vec3 pmvMatrix1; \n\
+ attribute highp vec3 pmvMatrix2; \n\
+ attribute highp vec3 pmvMatrix3; \n\
+ uniform mediump vec2 halfViewportSize; \n\
+ uniform highp mat3 brushTransform; \n\
+ uniform highp vec2 fmp; \n\
+ varying highp float b; \n\
+ varying highp vec2 A; \n\
+ void setPosition(void) \n\
+ {\n\
+ highp mat3 pmvMatrix = mat3(pmvMatrix1, pmvMatrix2, pmvMatrix3); \n\
+ vec3 transformedPos = pmvMatrix * vec3(vertexCoordsArray.xy, 1.0); \n\
+ gl_Position.xy = transformedPos.xy / transformedPos.z; \n\
+ mediump vec2 viewportCoords = (gl_Position.xy + 1.0) * halfViewportSize; \n\
+ mediump vec3 hTexCoords = brushTransform * vec3(viewportCoords, 1); \n\
+ mediump float invertedHTexCoordsZ = 1.0 / hTexCoords.z; \n\
+ gl_Position = vec4(gl_Position.xy * invertedHTexCoordsZ, 0.0, invertedHTexCoordsZ); \n\
+ A = hTexCoords.xy * invertedHTexCoordsZ; \n\
+ b = 2.0 * dot(A, fmp); \n\
+ }\n";
+
+static const char* const qglslAffinePositionWithRadialGradientBrushVertexShader
+ = qglslPositionWithRadialGradientBrushVertexShader;
+
+static const char* const qglslRadialGradientBrushSrcFragmentShader = "\n\
+ uniform sampler2D brushTexture; \n\
+ uniform highp float fmp2_m_radius2; \n\
+ uniform highp float inverse_2_fmp2_m_radius2; \n\
+ varying highp float b; \n\
+ varying highp vec2 A; \n\
+ lowp vec4 srcPixel() \n\
+ { \n\
+ highp float c = -dot(A, A); \n\
+ highp vec2 val = vec2((-b + sqrt(b*b - 4.0*fmp2_m_radius2*c)) * inverse_2_fmp2_m_radius2, 0.5); \n\
+ return texture2D(brushTexture, val); \n\
+ }\n";
+
+
+// Texture Brush
+static const char* const qglslPositionWithTextureBrushVertexShader = "\n\
+ attribute highp vec2 vertexCoordsArray; \n\
+ attribute highp vec3 pmvMatrix1; \n\
+ attribute highp vec3 pmvMatrix2; \n\
+ attribute highp vec3 pmvMatrix3; \n\
+ uniform mediump vec2 halfViewportSize; \n\
+ uniform highp vec2 invertedTextureSize; \n\
+ uniform highp mat3 brushTransform; \n\
+ varying highp vec2 brushTextureCoords; \n\
+ void setPosition(void) \n\
+ { \n\
+ highp mat3 pmvMatrix = mat3(pmvMatrix1, pmvMatrix2, pmvMatrix3); \n\
+ vec3 transformedPos = pmvMatrix * vec3(vertexCoordsArray.xy, 1.0); \n\
+ gl_Position.xy = transformedPos.xy / transformedPos.z; \n\
+ mediump vec2 viewportCoords = (gl_Position.xy + 1.0) * halfViewportSize; \n\
+ mediump vec3 hTexCoords = brushTransform * vec3(viewportCoords, 1); \n\
+ mediump float invertedHTexCoordsZ = 1.0 / hTexCoords.z; \n\
+ gl_Position = vec4(gl_Position.xy * invertedHTexCoordsZ, 0.0, invertedHTexCoordsZ); \n\
+ brushTextureCoords.xy = (hTexCoords.xy * invertedTextureSize) * gl_Position.w; \n\
+ }\n";
+
+static const char* const qglslAffinePositionWithTextureBrushVertexShader
+ = qglslPositionWithTextureBrushVertexShader;
+
+#if defined(QT_OPENGL_ES_2)
+// OpenGL ES does not support GL_REPEAT wrap modes for NPOT textures. So instead,
+// we emulate GL_REPEAT by only taking the fractional part of the texture coords.
+// TODO: Special case POT textures which don't need this emulation
+static const char* const qglslTextureBrushSrcFragmentShader = "\n\
+ varying highp vec2 brushTextureCoords; \n\
+ uniform sampler2D brushTexture; \n\
+ lowp vec4 srcPixel() { \n\
+ return texture2D(brushTexture, fract(brushTextureCoords)); \n\
+ }\n";
+#else
+static const char* const qglslTextureBrushSrcFragmentShader = "\n\
+ varying highp vec2 brushTextureCoords; \n\
+ uniform sampler2D brushTexture; \n\
+ lowp vec4 srcPixel() \n\
+ { \n\
+ return texture2D(brushTexture, brushTextureCoords); \n\
+ }\n";
+#endif
+
+static const char* const qglslTextureBrushSrcWithPatternFragmentShader = "\n\
+ varying highp vec2 brushTextureCoords; \n\
+ uniform lowp vec4 patternColor; \n\
+ uniform sampler2D brushTexture; \n\
+ lowp vec4 srcPixel() \n\
+ { \n\
+ return patternColor * (1.0 - texture2D(brushTexture, brushTextureCoords).r); \n\
+ }\n";
+
+// Solid Fill Brush
+static const char* const qglslSolidBrushSrcFragmentShader = "\n\
+ uniform lowp vec4 fragmentColor; \n\
+ lowp vec4 srcPixel() \n\
+ { \n\
+ return fragmentColor; \n\
+ }\n";
+
+static const char* const qglslImageSrcFragmentShader = "\n\
+ varying highp vec2 textureCoords; \n\
+ uniform sampler2D imageTexture; \n\
+ lowp vec4 srcPixel() \n\
+ { \n"
+ "return texture2D(imageTexture, textureCoords); \n"
+ "}\n";
+
+static const char* const qglslCustomSrcFragmentShader = "\n\
+ varying highp vec2 textureCoords; \n\
+ uniform sampler2D imageTexture; \n\
+ lowp vec4 srcPixel() \n\
+ { \n\
+ return customShader(imageTexture, textureCoords); \n\
+ }\n";
+
+static const char* const qglslImageSrcWithPatternFragmentShader = "\n\
+ varying highp vec2 textureCoords; \n\
+ uniform lowp vec4 patternColor; \n\
+ uniform sampler2D imageTexture; \n\
+ lowp vec4 srcPixel() \n\
+ { \n\
+ return patternColor * (1.0 - texture2D(imageTexture, textureCoords).r); \n\
+ }\n";
+
+static const char* const qglslNonPremultipliedImageSrcFragmentShader = "\n\
+ varying highp vec2 textureCoords; \n\
+ uniform sampler2D imageTexture; \n\
+ lowp vec4 srcPixel() \n\
+ { \n\
+ lowp vec4 sample = texture2D(imageTexture, textureCoords); \n\
+ sample.rgb = sample.rgb * sample.a; \n\
+ return sample; \n\
+ }\n";
+
+static const char* const qglslShockingPinkSrcFragmentShader = "\n\
+ lowp vec4 srcPixel() \n\
+ { \n\
+ return vec4(0.98, 0.06, 0.75, 1.0); \n\
+ }\n";
+
+static const char* const qglslMainFragmentShader_ImageArrays = "\n\
+ varying lowp float opacity; \n\
+ lowp vec4 srcPixel(); \n\
+ void main() \n\
+ { \n\
+ gl_FragColor = srcPixel() * opacity; \n\
+ }\n";
+
+static const char* const qglslMainFragmentShader_CMO = "\n\
+ uniform lowp float globalOpacity; \n\
+ lowp vec4 srcPixel(); \n\
+ lowp vec4 applyMask(lowp vec4); \n\
+ lowp vec4 compose(lowp vec4); \n\
+ void main() \n\
+ { \n\
+ gl_FragColor = applyMask(compose(srcPixel()*globalOpacity))); \n\
+ }\n";
+
+static const char* const qglslMainFragmentShader_CM = "\n\
+ lowp vec4 srcPixel(); \n\
+ lowp vec4 applyMask(lowp vec4); \n\
+ lowp vec4 compose(lowp vec4); \n\
+ void main() \n\
+ { \n\
+ gl_FragColor = applyMask(compose(srcPixel())); \n\
+ }\n";
+
+static const char* const qglslMainFragmentShader_MO = "\n\
+ uniform lowp float globalOpacity; \n\
+ lowp vec4 srcPixel(); \n\
+ lowp vec4 applyMask(lowp vec4); \n\
+ void main() \n\
+ { \n\
+ gl_FragColor = applyMask(srcPixel()*globalOpacity); \n\
+ }\n";
+
+static const char* const qglslMainFragmentShader_M = "\n\
+ lowp vec4 srcPixel(); \n\
+ lowp vec4 applyMask(lowp vec4); \n\
+ void main() \n\
+ { \n\
+ gl_FragColor = applyMask(srcPixel()); \n\
+ }\n";
+
+static const char* const qglslMainFragmentShader_CO = "\n\
+ uniform lowp float globalOpacity; \n\
+ lowp vec4 srcPixel(); \n\
+ lowp vec4 compose(lowp vec4); \n\
+ void main() \n\
+ { \n\
+ gl_FragColor = compose(srcPixel()*globalOpacity); \n\
+ }\n";
+
+static const char* const qglslMainFragmentShader_C = "\n\
+ lowp vec4 srcPixel(); \n\
+ lowp vec4 compose(lowp vec4); \n\
+ void main() \n\
+ { \n\
+ gl_FragColor = compose(srcPixel()); \n\
+ }\n";
+
+static const char* const qglslMainFragmentShader_O = "\n\
+ uniform lowp float globalOpacity; \n\
+ lowp vec4 srcPixel(); \n\
+ void main() \n\
+ { \n\
+ gl_FragColor = srcPixel()*globalOpacity; \n\
+ }\n";
+
+static const char* const qglslMainFragmentShader = "\n\
+ lowp vec4 srcPixel(); \n\
+ void main() \n\
+ { \n\
+ gl_FragColor = srcPixel(); \n\
+ }\n";
+
+static const char* const qglslMaskFragmentShader = "\n\
+ varying highp vec2 textureCoords;\n\
+ uniform sampler2D maskTexture;\n\
+ lowp vec4 applyMask(lowp vec4 src) \n\
+ {\n\
+ lowp vec4 mask = texture2D(maskTexture, textureCoords); \n\
+ return src * mask.a; \n\
+ }\n";
+
+// For source over with subpixel antialiasing, the final color is calculated per component as follows
+// (.a is alpha component, .c is red, green or blue component):
+// alpha = src.a * mask.c * opacity
+// dest.c = dest.c * (1 - alpha) + src.c * alpha
+//
+// In the first pass, calculate: dest.c = dest.c * (1 - alpha) with blend funcs: zero, 1 - source color
+// In the second pass, calculate: dest.c = dest.c + src.c * alpha with blend funcs: one, one
+//
+// If source is a solid color (src is constant), only the first pass is needed, with blend funcs: constant, 1 - source color
+
+// For source composition with subpixel antialiasing, the final color is calculated per component as follows:
+// alpha = src.a * mask.c * opacity
+// dest.c = dest.c * (1 - mask.c) + src.c * alpha
+//
+
+static const char* const qglslRgbMaskFragmentShaderPass1 = "\n\
+ varying highp vec2 textureCoords;\n\
+ uniform sampler2D maskTexture;\n\
+ lowp vec4 applyMask(lowp vec4 src) \n\
+ { \n\
+ lowp vec4 mask = texture2D(maskTexture, textureCoords); \n\
+ return src.a * mask; \n\
+ }\n";
+
+static const char* const qglslRgbMaskFragmentShaderPass2 = "\n\
+ varying highp vec2 textureCoords;\n\
+ uniform sampler2D maskTexture;\n\
+ lowp vec4 applyMask(lowp vec4 src) \n\
+ { \n\
+ lowp vec4 mask = texture2D(maskTexture, textureCoords); \n\
+ return src * mask; \n\
+ }\n";
+
+/*
+ Left to implement:
+ RgbMaskFragmentShader,
+ RgbMaskWithGammaFragmentShader,
+
+ MultiplyCompositionModeFragmentShader,
+ ScreenCompositionModeFragmentShader,
+ OverlayCompositionModeFragmentShader,
+ DarkenCompositionModeFragmentShader,
+ LightenCompositionModeFragmentShader,
+ ColorDodgeCompositionModeFragmentShader,
+ ColorBurnCompositionModeFragmentShader,
+ HardLightCompositionModeFragmentShader,
+ SoftLightCompositionModeFragmentShader,
+ DifferenceCompositionModeFragmentShader,
+ ExclusionCompositionModeFragmentShader,
+*/
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif // GLGC_SHADER_SOURCE_H
diff --git a/src/opengl/gl2paintengineex/qglgradientcache.cpp b/src/opengl/gl2paintengineex/qglgradientcache.cpp
new file mode 100644
index 0000000000..075f7d15ea
--- /dev/null
+++ b/src/opengl/gl2paintengineex/qglgradientcache.cpp
@@ -0,0 +1,206 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtOpenGL module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qglgradientcache_p.h"
+#include <private/qdrawhelper_p.h>
+#include <private/qgl_p.h>
+#include <QtCore/qmutex.h>
+
+QT_BEGIN_NAMESPACE
+
+class QGL2GradientCacheWrapper
+{
+public:
+ QGL2GradientCache *cacheForContext(const QGLContext *context) {
+ QMutexLocker lock(&m_mutex);
+ return m_resource.value(context);
+ }
+
+private:
+ QGLContextGroupResource<QGL2GradientCache> m_resource;
+ QMutex m_mutex;
+};
+
+Q_GLOBAL_STATIC(QGL2GradientCacheWrapper, qt_gradient_caches)
+
+QGL2GradientCache *QGL2GradientCache::cacheForContext(const QGLContext *context)
+{
+ return qt_gradient_caches()->cacheForContext(context);
+}
+
+void QGL2GradientCache::cleanCache()
+{
+ QMutexLocker lock(&m_mutex);
+ QGLGradientColorTableHash::const_iterator it = cache.constBegin();
+ for (; it != cache.constEnd(); ++it) {
+ const CacheInfo &cache_info = it.value();
+ glDeleteTextures(1, &cache_info.texId);
+ }
+ cache.clear();
+}
+
+GLuint QGL2GradientCache::getBuffer(const QGradient &gradient, qreal opacity)
+{
+ QMutexLocker lock(&m_mutex);
+ quint64 hash_val = 0;
+
+ QGradientStops stops = gradient.stops();
+ for (int i = 0; i < stops.size() && i <= 2; i++)
+ hash_val += stops[i].second.rgba();
+
+ QGLGradientColorTableHash::const_iterator it = cache.constFind(hash_val);
+
+ if (it == cache.constEnd())
+ return addCacheElement(hash_val, gradient, opacity);
+ else {
+ do {
+ const CacheInfo &cache_info = it.value();
+ if (cache_info.stops == stops && cache_info.opacity == opacity
+ && cache_info.interpolationMode == gradient.interpolationMode())
+ {
+ return cache_info.texId;
+ }
+ ++it;
+ } while (it != cache.constEnd() && it.key() == hash_val);
+ // an exact match for these stops and opacity was not found, create new cache
+ return addCacheElement(hash_val, gradient, opacity);
+ }
+}
+
+
+GLuint QGL2GradientCache::addCacheElement(quint64 hash_val, const QGradient &gradient, qreal opacity)
+{
+ if (cache.size() == maxCacheSize()) {
+ int elem_to_remove = qrand() % maxCacheSize();
+ quint64 key = cache.keys()[elem_to_remove];
+
+ // need to call glDeleteTextures on each removed cache entry:
+ QGLGradientColorTableHash::const_iterator it = cache.constFind(key);
+ do {
+ glDeleteTextures(1, &it.value().texId);
+ } while (++it != cache.constEnd() && it.key() == key);
+ cache.remove(key); // may remove more than 1, but OK
+ }
+
+ CacheInfo cache_entry(gradient.stops(), opacity, gradient.interpolationMode());
+ uint buffer[1024];
+ generateGradientColorTable(gradient, buffer, paletteSize(), opacity);
+ glGenTextures(1, &cache_entry.texId);
+ glBindTexture(GL_TEXTURE_2D, cache_entry.texId);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, paletteSize(), 1,
+ 0, GL_RGBA, GL_UNSIGNED_BYTE, buffer);
+ return cache.insert(hash_val, cache_entry).value().texId;
+}
+
+
+// GL's expects pixels in RGBA (when using GL_RGBA), bin-endian (ABGR on x86).
+// Qt always stores in ARGB reguardless of the byte-order the mancine uses.
+static inline uint qtToGlColor(uint c)
+{
+ uint o;
+#if Q_BYTE_ORDER == Q_LITTLE_ENDIAN
+ o = (c & 0xff00ff00) // alpha & green already in the right place
+ | ((c >> 16) & 0x000000ff) // red
+ | ((c << 16) & 0x00ff0000); // blue
+#else //Q_BIG_ENDIAN
+ o = (c << 8)
+ | ((c >> 24) & 0x000000ff);
+#endif // Q_BYTE_ORDER
+ return o;
+}
+
+//TODO: Let GL generate the texture using an FBO
+void QGL2GradientCache::generateGradientColorTable(const QGradient& gradient, uint *colorTable, int size, qreal opacity) const
+{
+ int pos = 0;
+ QGradientStops s = gradient.stops();
+ QVector<uint> colors(s.size());
+
+ for (int i = 0; i < s.size(); ++i)
+ colors[i] = s[i].second.rgba(); // Qt LIES! It returns ARGB (on little-endian AND on big-endian)
+
+ bool colorInterpolation = (gradient.interpolationMode() == QGradient::ColorInterpolation);
+
+ uint alpha = qRound(opacity * 256);
+ uint current_color = ARGB_COMBINE_ALPHA(colors[0], alpha);
+ qreal incr = 1.0 / qreal(size);
+ qreal fpos = 1.5 * incr;
+ colorTable[pos++] = qtToGlColor(PREMUL(current_color));
+
+ while (fpos <= s.first().first) {
+ colorTable[pos] = colorTable[pos - 1];
+ pos++;
+ fpos += incr;
+ }
+
+ if (colorInterpolation)
+ current_color = PREMUL(current_color);
+
+ for (int i = 0; i < s.size() - 1; ++i) {
+ qreal delta = 1/(s[i+1].first - s[i].first);
+ uint next_color = ARGB_COMBINE_ALPHA(colors[i+1], alpha);
+ if (colorInterpolation)
+ next_color = PREMUL(next_color);
+
+ while (fpos < s[i+1].first && pos < size) {
+ int dist = int(256 * ((fpos - s[i].first) * delta));
+ int idist = 256 - dist;
+ if (colorInterpolation)
+ colorTable[pos] = qtToGlColor(INTERPOLATE_PIXEL_256(current_color, idist, next_color, dist));
+ else
+ colorTable[pos] = qtToGlColor(PREMUL(INTERPOLATE_PIXEL_256(current_color, idist, next_color, dist)));
+ ++pos;
+ fpos += incr;
+ }
+ current_color = next_color;
+ }
+
+ Q_ASSERT(s.size() > 0);
+
+ uint last_color = qtToGlColor(PREMUL(ARGB_COMBINE_ALPHA(colors[s.size() - 1], alpha)));
+ for (;pos < size; ++pos)
+ colorTable[pos] = last_color;
+
+ // Make sure the last color stop is represented at the end of the table
+ colorTable[size-1] = last_color;
+}
+
+QT_END_NAMESPACE
diff --git a/src/opengl/gl2paintengineex/qglgradientcache_p.h b/src/opengl/gl2paintengineex/qglgradientcache_p.h
new file mode 100644
index 0000000000..d1d56a178a
--- /dev/null
+++ b/src/opengl/gl2paintengineex/qglgradientcache_p.h
@@ -0,0 +1,98 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtOpenGL module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//
+// W A R N I N G
+// -------------
+//
+// This file is not part of the Qt API. It exists purely as an
+// implementation detail. This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QMultiHash>
+#include <QObject>
+#include <QtOpenGL/QtOpenGL>
+#include <private/qgl_p.h>
+#include <QtCore/qmutex.h>
+
+QT_BEGIN_NAMESPACE
+
+class QGL2GradientCache
+{
+ struct CacheInfo
+ {
+ inline CacheInfo(QGradientStops s, qreal op, QGradient::InterpolationMode mode) :
+ stops(s), opacity(op), interpolationMode(mode) {}
+
+ GLuint texId;
+ QGradientStops stops;
+ qreal opacity;
+ QGradient::InterpolationMode interpolationMode;
+ };
+
+ typedef QMultiHash<quint64, CacheInfo> QGLGradientColorTableHash;
+
+public:
+ static QGL2GradientCache *cacheForContext(const QGLContext *context);
+
+ QGL2GradientCache(const QGLContext *) {}
+ ~QGL2GradientCache() { cleanCache(); }
+
+ GLuint getBuffer(const QGradient &gradient, qreal opacity);
+ inline int paletteSize() const { return 1024; }
+
+private:
+ inline int maxCacheSize() const { return 60; }
+ inline void generateGradientColorTable(const QGradient& gradient,
+ uint *colorTable,
+ int size, qreal opacity) const;
+ GLuint addCacheElement(quint64 hash_val, const QGradient &gradient, qreal opacity);
+ void cleanCache();
+
+ QGLGradientColorTableHash cache;
+ QMutex m_mutex;
+};
+
+QT_END_NAMESPACE
+
diff --git a/src/opengl/gl2paintengineex/qglshadercache_meego_p.h b/src/opengl/gl2paintengineex/qglshadercache_meego_p.h
new file mode 100644
index 0000000000..d20c731fc3
--- /dev/null
+++ b/src/opengl/gl2paintengineex/qglshadercache_meego_p.h
@@ -0,0 +1,457 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtOpenGL module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//
+// W A R N I N G
+// -------------
+//
+// This file is not part of the Qt API. It exists purely as an
+// implementation detail. This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#ifndef QGLSHADERCACHE_MEEGO_P_H
+#define QGLSHADERCACHE_MEEGO_P_H
+
+#include <QtCore/qglobal.h>
+
+#if defined(QT_MEEGO_EXPERIMENTAL_SHADERCACHE) && defined(QT_OPENGL_ES_2)
+
+#include <QtCore/qcryptographichash.h>
+#include <QtCore/qsharedmemory.h>
+#include <QtCore/qsystemsemaphore.h>
+
+#ifndef QT_BOOTSTRAPPED
+# include <GLES2/gl2ext.h>
+#endif
+#if defined(QT_DEBUG) || defined(QT_MEEGO_EXPERIMENTAL_SHADERCACHE_TRACE)
+# include <syslog.h>
+#endif
+
+QT_BEGIN_HEADER
+
+/*
+ This cache stores internal Qt shader programs in shared memory.
+
+ This header file is ugly on purpose and can only be included once. It is only to be used
+ for the internal shader cache, not as a generic cache for anyone's shaders.
+
+ The cache stores either ShaderCacheMaxEntries shader programs or ShaderCacheDataSize kilobytes
+ of shader programs, whatever limit is reached first.
+
+ The layout of the cache is as outlined in the CachedShaders struct. After some
+ integers, an array of headers is reserved, then comes the space for the actual binaries.
+
+ Shader Programs are identified by the md5sum of their frag and vertex shader source code.
+
+ Shader Programs are never removed. The cache never shrinks or re-shuffles. This is done
+ on purpose to ensure minimum amount of locking, no alignment problems and very few write
+ operations.
+
+ Note: Locking the shader cache could be expensive, because the entire system might hang.
+ That's why the cache is immutable to minimize the time we need to keep it locked.
+
+ Why is it Meego specific?
+
+ First, the size is chosen so that it fits to generic meego usage. Second, on Meego, there's
+ always at least one Qt application active (the launcher), so the cache will never be destroyed.
+ Only when the last Qt app exits, the cache dies, which should only be when someone kills the
+ X11 server. And last but not least it was only tested with Meego's SGX driver.
+
+ There's a small tool in src/opengl/util/meego that dumps the contents of the cache.
+ */
+
+// anonymous namespace, prevent exporting of the private symbols
+namespace
+{
+
+struct CachedShaderHeader
+{
+ /* the index in the data[] member of CachedShaders */
+ int index;
+ /* the size of the binary shader */
+ GLsizei size;
+ /* the format of the binary shader */
+ GLenum format;
+ /* the md5sum of the frag+vertex shaders */
+ char md5Sum[16];
+};
+
+enum
+{
+ /* The maximum amount of shader programs the cache can hold */
+ ShaderCacheMaxEntries = 20
+};
+
+typedef CachedShaderHeader CachedShaderHeaders[ShaderCacheMaxEntries];
+
+enum
+{
+ // ShaderCacheDataSize is 20k minus the other data members of CachedShaders
+ ShaderCacheDataSize = 1024 * ShaderCacheMaxEntries - sizeof(CachedShaderHeaders) - 2 * sizeof(int)
+};
+
+struct CachedShaders
+{
+ /* How much space is still available in the cache */
+ inline int availableSize() const { return ShaderCacheDataSize - dataSize; }
+
+ /* The current amount of cached shaders */
+ int shaderCount;
+
+ /* The current amount (in bytes) of cached data */
+ int dataSize;
+
+ /* The headers describing the shaders */
+ CachedShaderHeaders headers;
+
+ /* The actual binary data of the shader programs */
+ char data[ShaderCacheDataSize];
+};
+
+//#define QT_DEBUG_SHADER_CACHE
+#ifdef QT_DEBUG_SHADER_CACHE
+static QDebug shaderCacheDebug()
+{
+ return QDebug(QtDebugMsg);
+}
+#else
+static inline QNoDebug shaderCacheDebug() { return QNoDebug(); }
+#endif
+
+class ShaderCacheSharedMemory
+{
+public:
+ ShaderCacheSharedMemory()
+ : shm(QLatin1String("qt_gles2_shadercache_" QT_VERSION_STR))
+ {
+ // we need a system semaphore here, since cache creation and initialization must be atomic
+ QSystemSemaphore attachSemaphore(QLatin1String("qt_gles2_shadercache_mutex_" QT_VERSION_STR), 1);
+
+ if (!attachSemaphore.acquire()) {
+ shaderCacheDebug() << "Unable to require shader cache semaphore:" << attachSemaphore.errorString();
+ return;
+ }
+
+ if (shm.attach()) {
+ // success!
+ shaderCacheDebug() << "Attached to shader cache";
+ } else {
+
+ // no cache exists - create and initialize it
+ if (shm.create(sizeof(CachedShaders))) {
+ shaderCacheDebug() << "Created new shader cache";
+ initializeCache();
+ } else {
+ shaderCacheDebug() << "Unable to create shader cache:" << shm.errorString();
+ }
+ }
+
+ attachSemaphore.release();
+ }
+
+ inline bool isAttached() const { return shm.isAttached(); }
+
+ inline bool lock() { return shm.lock(); }
+ inline bool unlock() { return shm.unlock(); }
+ inline void *data() { return shm.data(); }
+ inline QString errorString() { return shm.errorString(); }
+
+ ~ShaderCacheSharedMemory()
+ {
+ if (!shm.detach())
+ shaderCacheDebug() << "Unable to detach shader cache" << shm.errorString();
+ }
+
+private:
+ void initializeCache()
+ {
+ // no need to lock the shared memory since we're already protected by the
+ // attach system semaphore.
+
+ void *data = shm.data();
+ Q_ASSERT(data);
+
+ memset(data, 0, sizeof(CachedShaders));
+ }
+
+ QSharedMemory shm;
+};
+
+class ShaderCacheLocker
+{
+public:
+ inline ShaderCacheLocker(ShaderCacheSharedMemory *cache)
+ : shm(cache->lock() ? cache : (ShaderCacheSharedMemory *)0)
+ {
+ if (!shm)
+ shaderCacheDebug() << "Unable to lock shader cache" << cache->errorString();
+ }
+
+ inline bool isLocked() const { return shm; }
+
+ inline ~ShaderCacheLocker()
+ {
+ if (!shm)
+ return;
+ if (!shm->unlock())
+ shaderCacheDebug() << "Unable to unlock shader cache" << shm->errorString();
+ }
+
+private:
+ ShaderCacheSharedMemory *shm;
+};
+
+#ifdef QT_BOOTSTRAPPED
+} // end namespace
+#else
+
+static void traceCacheOverflow(const char *message)
+{
+#if defined(QT_DEBUG) || defined (QT_MEEGO_EXPERIMENTAL_SHADERCACHE_TRACE)
+ openlog(qPrintable(QCoreApplication::applicationName()), LOG_PID | LOG_ODELAY, LOG_USER);
+ syslog(LOG_DEBUG, message);
+ closelog();
+#endif
+ shaderCacheDebug() << message;
+}
+
+Q_GLOBAL_STATIC(ShaderCacheSharedMemory, shaderCacheSharedMemory)
+
+/*
+ Finds the index of the shader program identified by md5Sum in the cache.
+ Note: Does NOT lock the cache for reading, the cache must already be locked!
+
+ Returns -1 when no shader was found.
+ */
+static int qt_cache_index_unlocked(const QByteArray &md5Sum, CachedShaders *cache)
+{
+ for (int i = 0; i < cache->shaderCount; ++i) {
+ if (qstrncmp(md5Sum.constData(), cache->headers[i].md5Sum, 16) == 0) {
+ return i;
+ }
+ }
+ return -1;
+}
+
+/* Returns the index of the shader identified by md5Sum */
+static int qt_cache_index(const QByteArray &md5Sum)
+{
+ ShaderCacheSharedMemory *shm = shaderCacheSharedMemory();
+ if (!shm || !shm->isAttached())
+ return false;
+
+ Q_ASSERT(md5Sum.length() == 16);
+
+ ShaderCacheLocker locker(shm);
+ if (!locker.isLocked())
+ return false;
+
+ void *data = shm->data();
+ Q_ASSERT(data);
+
+ CachedShaders *cache = reinterpret_cast<CachedShaders *>(data);
+
+ return qt_cache_index_unlocked(md5Sum, cache);
+}
+
+/* Loads the cached shader at index \a shaderIndex into \a program
+ * Note: Since the cache is immutable, this operation doesn't lock the shared memory.
+ */
+static bool qt_cached_shader(QGLShaderProgram *program, const QGLContext *ctx, int shaderIndex)
+{
+ Q_ASSERT(shaderIndex >= 0 && shaderIndex <= ShaderCacheMaxEntries);
+ Q_ASSERT(program);
+
+ ShaderCacheSharedMemory *shm = shaderCacheSharedMemory();
+ if (!shm || !shm->isAttached())
+ return false;
+
+ void *data = shm->data();
+ Q_ASSERT(data);
+
+ CachedShaders *cache = reinterpret_cast<CachedShaders *>(data);
+
+ shaderCacheDebug() << "fetching cached shader at index" << shaderIndex
+ << "dataIndex" << cache->headers[shaderIndex].index
+ << "size" << cache->headers[shaderIndex].size
+ << "format" << cache->headers[shaderIndex].format;
+
+ // call program->programId first, since that resolves the glProgramBinaryOES symbol
+ GLuint programId = program->programId();
+ glProgramBinaryOES(programId, cache->headers[shaderIndex].format,
+ cache->data + cache->headers[shaderIndex].index,
+ cache->headers[shaderIndex].size);
+
+ return true;
+}
+
+/* Stores the shader program in the cache. Returns false if there's an error with the cache, or
+ if the cache is too small to hold the shader. */
+static bool qt_cache_shader(const QGLShaderProgram *shader, const QGLContext *ctx, const QByteArray &md5Sum)
+{
+ ShaderCacheSharedMemory *shm = shaderCacheSharedMemory();
+ if (!shm || !shm->isAttached())
+ return false;
+
+ void *data = shm->data();
+ Q_ASSERT(data);
+
+ CachedShaders *cache = reinterpret_cast<CachedShaders *>(data);
+
+ ShaderCacheLocker locker(shm);
+ if (!locker.isLocked())
+ return false;
+
+ int cacheIdx = cache->shaderCount;
+ if (cacheIdx >= ShaderCacheMaxEntries) {
+ traceCacheOverflow("Qt OpenGL shader cache index overflow!");
+ return false;
+ }
+
+ // now that we have the lock on the shared memory, make sure no one
+ // inserted the shader already while we were unlocked
+ if (qt_cache_index_unlocked(md5Sum, cache) != -1)
+ return true; // already cached
+
+ shaderCacheDebug() << "Caching shader at index" << cacheIdx;
+
+ GLint binaryLength = 0;
+ glGetProgramiv(shader->programId(), GL_PROGRAM_BINARY_LENGTH_OES, &binaryLength);
+
+ if (!binaryLength) {
+ shaderCacheDebug() << "Unable to determine binary shader size!";
+ return false;
+ }
+
+ if (binaryLength > cache->availableSize()) {
+ traceCacheOverflow("Qt OpenGL shader cache data overflow!");
+ return false;
+ }
+
+ GLsizei size = 0;
+ GLenum format = 0;
+ glGetProgramBinaryOES(shader->programId(), binaryLength, &size, &format,
+ cache->data + cache->dataSize);
+
+ if (!size) {
+ shaderCacheDebug() << "Unable to get binary shader!";
+ return false;
+ }
+
+ cache->headers[cacheIdx].index = cache->dataSize;
+ cache->dataSize += binaryLength;
+ ++cache->shaderCount;
+ cache->headers[cacheIdx].size = binaryLength;
+ cache->headers[cacheIdx].format = format;
+
+ memcpy(cache->headers[cacheIdx].md5Sum, md5Sum.constData(), 16);
+
+ shaderCacheDebug() << "cached shader size" << size
+ << "format" << format
+ << "binarySize" << binaryLength
+ << "cache index" << cacheIdx
+ << "data index" << cache->headers[cacheIdx].index;
+
+ return true;
+}
+
+} // namespace
+
+QT_BEGIN_NAMESPACE
+
+QT_MODULE(OpenGL)
+
+class CachedShader
+{
+public:
+ CachedShader(const QByteArray &fragSource, const QByteArray &vertexSource)
+ : cacheIdx(-1)
+ {
+ QCryptographicHash md5Hash(QCryptographicHash::Md5);
+
+ md5Hash.addData(fragSource);
+ md5Hash.addData(vertexSource);
+
+ md5Sum = md5Hash.result();
+ }
+
+ bool isCached()
+ {
+ return cacheIndex() != -1;
+ }
+
+ int cacheIndex()
+ {
+ if (cacheIdx != -1)
+ return cacheIdx;
+ cacheIdx = qt_cache_index(md5Sum);
+ return cacheIdx;
+ }
+
+ bool load(QGLShaderProgram *program, const QGLContext *ctx)
+ {
+ if (cacheIndex() == -1)
+ return false;
+ return qt_cached_shader(program, ctx, cacheIdx);
+ }
+
+ bool store(QGLShaderProgram *program, const QGLContext *ctx)
+ {
+ return qt_cache_shader(program, ctx, md5Sum);
+ }
+
+private:
+ QByteArray md5Sum;
+ int cacheIdx;
+};
+
+
+QT_END_NAMESPACE
+
+#endif
+
+QT_END_HEADER
+
+#endif
+#endif
diff --git a/src/opengl/gl2paintengineex/qglshadercache_p.h b/src/opengl/gl2paintengineex/qglshadercache_p.h
new file mode 100644
index 0000000000..6e496abf7c
--- /dev/null
+++ b/src/opengl/gl2paintengineex/qglshadercache_p.h
@@ -0,0 +1,98 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtOpenGL module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//
+// W A R N I N G
+// -------------
+//
+// This file is not part of the Qt API. It exists purely as an
+// implementation detail. This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#ifndef QGLSHADERCACHE_P_H
+#define QGLSHADERCACHE_P_H
+
+#include <QtCore/qglobal.h>
+
+#if defined(QT_MEEGO_EXPERIMENTAL_SHADERCACHE) && defined(QT_OPENGL_ES_2)
+# include "qglshadercache_meego_p.h"
+#else
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+QT_MODULE(OpenGL)
+
+class QGLShaderProgram;
+class QGLContext;
+
+class CachedShader
+{
+public:
+ inline CachedShader(const QByteArray &, const QByteArray &)
+ {}
+
+ inline bool isCached()
+ {
+ return false;
+ }
+
+ inline bool load(QGLShaderProgram *, const QGLContext *)
+ {
+ return false;
+ }
+
+ inline bool store(QGLShaderProgram *, const QGLContext *)
+ {
+ return false;
+ }
+};
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif
+#endif
diff --git a/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp b/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp
new file mode 100644
index 0000000000..18c684ff1b
--- /dev/null
+++ b/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp
@@ -0,0 +1,2458 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtOpenGL module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*
+ When the active program changes, we need to update it's uniforms.
+ We could track state for each program and only update stale uniforms
+ - Could lead to lots of overhead if there's a lot of programs
+ We could update all the uniforms when the program changes
+ - Could end up updating lots of uniforms which don't need updating
+
+ Updating uniforms should be cheap, so the overhead of updating up-to-date
+ uniforms should be minimal. It's also less complex.
+
+ Things which _may_ cause a different program to be used:
+ - Change in brush/pen style
+ - Change in painter opacity
+ - Change in composition mode
+
+ Whenever we set a mode on the shader manager - it needs to tell us if it had
+ to switch to a different program.
+
+ The shader manager should only switch when we tell it to. E.g. if we set a new
+ brush style and then switch to transparent painter, we only want it to compile
+ and use the correct program when we really need it.
+*/
+
+// #define QT_OPENGL_CACHE_AS_VBOS
+
+#include "qglgradientcache_p.h"
+#include "qpaintengineex_opengl2_p.h"
+
+#include <string.h> //for memcpy
+#include <qmath.h>
+
+#include <private/qgl_p.h>
+#include <private/qmath_p.h>
+#include <private/qpaintengineex_p.h>
+#include <QPaintEngine>
+#include <private/qpainter_p.h>
+#include <private/qfontengine_p.h>
+#include <private/qpixmapdata_gl_p.h>
+#include <private/qdatabuffer_p.h>
+#include <private/qstatictext_p.h>
+#include <private/qtriangulator_p.h>
+
+#include "qglengineshadermanager_p.h"
+#include "qgl2pexvertexarray_p.h"
+#include "qtriangulatingstroker_p.h"
+#include "qtextureglyphcache_gl_p.h"
+
+#include <QDebug>
+
+QT_BEGIN_NAMESPACE
+
+#if defined(Q_WS_WIN)
+extern Q_GUI_EXPORT bool qt_cleartype_enabled;
+#endif
+
+#ifdef Q_WS_MAC
+extern bool qt_applefontsmoothing_enabled;
+#endif
+
+#if !defined(QT_MAX_CACHED_GLYPH_SIZE)
+# define QT_MAX_CACHED_GLYPH_SIZE 64
+#endif
+
+Q_GUI_EXPORT QImage qt_imageForBrush(int brushStyle, bool invert);
+
+////////////////////////////////// Private Methods //////////////////////////////////////////
+
+QGL2PaintEngineExPrivate::~QGL2PaintEngineExPrivate()
+{
+ delete shaderManager;
+
+ while (pathCaches.size()) {
+ QVectorPath::CacheEntry *e = *(pathCaches.constBegin());
+ e->cleanup(e->engine, e->data);
+ e->data = 0;
+ e->engine = 0;
+ }
+
+ if (elementIndicesVBOId != 0) {
+ glDeleteBuffers(1, &elementIndicesVBOId);
+ elementIndicesVBOId = 0;
+ }
+}
+
+void QGL2PaintEngineExPrivate::updateTextureFilter(GLenum target, GLenum wrapMode, bool smoothPixmapTransform, GLuint id)
+{
+// glActiveTexture(GL_TEXTURE0 + QT_BRUSH_TEXTURE_UNIT); //### Is it always this texture unit?
+ if (id != GLuint(-1) && id == lastTextureUsed)
+ return;
+
+ lastTextureUsed = id;
+
+ if (smoothPixmapTransform) {
+ glTexParameterf(target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+ glTexParameterf(target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ } else {
+ glTexParameterf(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+ glTexParameterf(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ }
+ glTexParameterf(target, GL_TEXTURE_WRAP_S, wrapMode);
+ glTexParameterf(target, GL_TEXTURE_WRAP_T, wrapMode);
+}
+
+
+inline QColor qt_premultiplyColor(QColor c, GLfloat opacity)
+{
+ qreal alpha = c.alphaF() * opacity;
+ c.setAlphaF(alpha);
+ c.setRedF(c.redF() * alpha);
+ c.setGreenF(c.greenF() * alpha);
+ c.setBlueF(c.blueF() * alpha);
+ return c;
+}
+
+
+void QGL2PaintEngineExPrivate::setBrush(const QBrush& brush)
+{
+ if (qbrush_fast_equals(currentBrush, brush))
+ return;
+
+ const Qt::BrushStyle newStyle = qbrush_style(brush);
+ Q_ASSERT(newStyle != Qt::NoBrush);
+
+ currentBrush = brush;
+ if (!currentBrushPixmap.isNull())
+ currentBrushPixmap = QPixmap();
+ brushUniformsDirty = true; // All brushes have at least one uniform
+
+ if (newStyle > Qt::SolidPattern)
+ brushTextureDirty = true;
+
+ if (currentBrush.style() == Qt::TexturePattern
+ && qHasPixmapTexture(brush) && brush.texture().isQBitmap())
+ {
+ shaderManager->setSrcPixelType(QGLEngineShaderManager::TextureSrcWithPattern);
+ } else {
+ shaderManager->setSrcPixelType(newStyle);
+ }
+ shaderManager->optimiseForBrushTransform(currentBrush.transform().type());
+}
+
+
+void QGL2PaintEngineExPrivate::useSimpleShader()
+{
+ shaderManager->useSimpleProgram();
+
+ if (matrixDirty)
+ updateMatrix();
+}
+
+void QGL2PaintEngineExPrivate::updateBrushTexture()
+{
+ Q_Q(QGL2PaintEngineEx);
+// qDebug("QGL2PaintEngineExPrivate::updateBrushTexture()");
+ Qt::BrushStyle style = currentBrush.style();
+
+ if ( (style >= Qt::Dense1Pattern) && (style <= Qt::DiagCrossPattern) ) {
+ // Get the image data for the pattern
+ QImage texImage = qt_imageForBrush(style, false);
+
+ glActiveTexture(GL_TEXTURE0 + QT_BRUSH_TEXTURE_UNIT);
+ ctx->d_func()->bindTexture(texImage, GL_TEXTURE_2D, GL_RGBA, QGLContext::InternalBindOption);
+ updateTextureFilter(GL_TEXTURE_2D, GL_REPEAT, q->state()->renderHints & QPainter::SmoothPixmapTransform);
+ }
+ else if (style >= Qt::LinearGradientPattern && style <= Qt::ConicalGradientPattern) {
+ // Gradiant brush: All the gradiants use the same texture
+
+ const QGradient* g = currentBrush.gradient();
+
+ // We apply global opacity in the fragment shaders, so we always pass 1.0
+ // for opacity to the cache.
+ GLuint texId = QGL2GradientCache::cacheForContext(ctx)->getBuffer(*g, 1.0);
+
+ glActiveTexture(GL_TEXTURE0 + QT_BRUSH_TEXTURE_UNIT);
+ glBindTexture(GL_TEXTURE_2D, texId);
+
+ if (g->spread() == QGradient::RepeatSpread || g->type() == QGradient::ConicalGradient)
+ updateTextureFilter(GL_TEXTURE_2D, GL_REPEAT, q->state()->renderHints & QPainter::SmoothPixmapTransform);
+ else if (g->spread() == QGradient::ReflectSpread)
+ updateTextureFilter(GL_TEXTURE_2D, GL_MIRRORED_REPEAT_IBM, q->state()->renderHints & QPainter::SmoothPixmapTransform);
+ else
+ updateTextureFilter(GL_TEXTURE_2D, GL_CLAMP_TO_EDGE, q->state()->renderHints & QPainter::SmoothPixmapTransform);
+ }
+ else if (style == Qt::TexturePattern) {
+ currentBrushPixmap = currentBrush.texture();
+
+ int max_texture_size = ctx->d_func()->maxTextureSize();
+ if (currentBrushPixmap.width() > max_texture_size || currentBrushPixmap.height() > max_texture_size)
+ currentBrushPixmap = currentBrushPixmap.scaled(max_texture_size, max_texture_size, Qt::KeepAspectRatio);
+
+ glActiveTexture(GL_TEXTURE0 + QT_BRUSH_TEXTURE_UNIT);
+ QGLTexture *tex = ctx->d_func()->bindTexture(currentBrushPixmap, GL_TEXTURE_2D, GL_RGBA,
+ QGLContext::InternalBindOption |
+ QGLContext::CanFlipNativePixmapBindOption);
+ updateTextureFilter(GL_TEXTURE_2D, GL_REPEAT, q->state()->renderHints & QPainter::SmoothPixmapTransform);
+ textureInvertedY = tex->options & QGLContext::InvertedYBindOption ? -1 : 1;
+ }
+ brushTextureDirty = false;
+}
+
+
+void QGL2PaintEngineExPrivate::updateBrushUniforms()
+{
+// qDebug("QGL2PaintEngineExPrivate::updateBrushUniforms()");
+ Qt::BrushStyle style = currentBrush.style();
+
+ if (style == Qt::NoBrush)
+ return;
+
+ QTransform brushQTransform = currentBrush.transform();
+
+ if (style == Qt::SolidPattern) {
+ QColor col = qt_premultiplyColor(currentBrush.color(), (GLfloat)q->state()->opacity);
+ shaderManager->currentProgram()->setUniformValue(location(QGLEngineShaderManager::FragmentColor), col);
+ }
+ else {
+ // All other brushes have a transform and thus need the translation point:
+ QPointF translationPoint;
+
+ if (style <= Qt::DiagCrossPattern) {
+ QColor col = qt_premultiplyColor(currentBrush.color(), (GLfloat)q->state()->opacity);
+
+ shaderManager->currentProgram()->setUniformValue(location(QGLEngineShaderManager::PatternColor), col);
+
+ QVector2D halfViewportSize(width*0.5, height*0.5);
+ shaderManager->currentProgram()->setUniformValue(location(QGLEngineShaderManager::HalfViewportSize), halfViewportSize);
+ }
+ else if (style == Qt::LinearGradientPattern) {
+ const QLinearGradient *g = static_cast<const QLinearGradient *>(currentBrush.gradient());
+
+ QPointF realStart = g->start();
+ QPointF realFinal = g->finalStop();
+ translationPoint = realStart;
+
+ QPointF l = realFinal - realStart;
+
+ QVector3D linearData(
+ l.x(),
+ l.y(),
+ 1.0f / (l.x() * l.x() + l.y() * l.y())
+ );
+
+ shaderManager->currentProgram()->setUniformValue(location(QGLEngineShaderManager::LinearData), linearData);
+
+ QVector2D halfViewportSize(width*0.5, height*0.5);
+ shaderManager->currentProgram()->setUniformValue(location(QGLEngineShaderManager::HalfViewportSize), halfViewportSize);
+ }
+ else if (style == Qt::ConicalGradientPattern) {
+ const QConicalGradient *g = static_cast<const QConicalGradient *>(currentBrush.gradient());
+ translationPoint = g->center();
+
+ GLfloat angle = -(g->angle() * 2 * Q_PI) / 360.0;
+
+ shaderManager->currentProgram()->setUniformValue(location(QGLEngineShaderManager::Angle), angle);
+
+ QVector2D halfViewportSize(width*0.5, height*0.5);
+ shaderManager->currentProgram()->setUniformValue(location(QGLEngineShaderManager::HalfViewportSize), halfViewportSize);
+ }
+ else if (style == Qt::RadialGradientPattern) {
+ const QRadialGradient *g = static_cast<const QRadialGradient *>(currentBrush.gradient());
+ QPointF realCenter = g->center();
+ QPointF realFocal = g->focalPoint();
+ qreal realRadius = g->radius();
+ translationPoint = realFocal;
+
+ QPointF fmp = realCenter - realFocal;
+ shaderManager->currentProgram()->setUniformValue(location(QGLEngineShaderManager::Fmp), fmp);
+
+ GLfloat fmp2_m_radius2 = -fmp.x() * fmp.x() - fmp.y() * fmp.y() + realRadius*realRadius;
+ shaderManager->currentProgram()->setUniformValue(location(QGLEngineShaderManager::Fmp2MRadius2), fmp2_m_radius2);
+ shaderManager->currentProgram()->setUniformValue(location(QGLEngineShaderManager::Inverse2Fmp2MRadius2),
+ GLfloat(1.0 / (2.0*fmp2_m_radius2)));
+
+ QVector2D halfViewportSize(width*0.5, height*0.5);
+ shaderManager->currentProgram()->setUniformValue(location(QGLEngineShaderManager::HalfViewportSize), halfViewportSize);
+ }
+ else if (style == Qt::TexturePattern) {
+ const QPixmap& texPixmap = currentBrush.texture();
+
+ if (qHasPixmapTexture(currentBrush) && currentBrush.texture().isQBitmap()) {
+ QColor col = qt_premultiplyColor(currentBrush.color(), (GLfloat)q->state()->opacity);
+ shaderManager->currentProgram()->setUniformValue(location(QGLEngineShaderManager::PatternColor), col);
+ }
+
+ QSizeF invertedTextureSize(1.0 / texPixmap.width(), 1.0 / texPixmap.height());
+ shaderManager->currentProgram()->setUniformValue(location(QGLEngineShaderManager::InvertedTextureSize), invertedTextureSize);
+
+ QVector2D halfViewportSize(width*0.5, height*0.5);
+ shaderManager->currentProgram()->setUniformValue(location(QGLEngineShaderManager::HalfViewportSize), halfViewportSize);
+ }
+ else
+ qWarning("QGL2PaintEngineEx: Unimplemented fill style");
+
+ const QPointF &brushOrigin = q->state()->brushOrigin;
+ QTransform matrix = q->state()->matrix;
+ matrix.translate(brushOrigin.x(), brushOrigin.y());
+
+ QTransform translate(1, 0, 0, 1, -translationPoint.x(), -translationPoint.y());
+ qreal m22 = -1;
+ qreal dy = height;
+ if (device->isFlipped()) {
+ m22 = 1;
+ dy = 0;
+ }
+ QTransform gl_to_qt(1, 0, 0, m22, 0, dy);
+ QTransform inv_matrix;
+ if (style == Qt::TexturePattern && textureInvertedY == -1)
+ inv_matrix = gl_to_qt * (QTransform(1, 0, 0, -1, 0, currentBrush.texture().height()) * brushQTransform * matrix).inverted() * translate;
+ else
+ inv_matrix = gl_to_qt * (brushQTransform * matrix).inverted() * translate;
+
+ shaderManager->currentProgram()->setUniformValue(location(QGLEngineShaderManager::BrushTransform), inv_matrix);
+ shaderManager->currentProgram()->setUniformValue(location(QGLEngineShaderManager::BrushTexture), QT_BRUSH_TEXTURE_UNIT);
+ }
+ brushUniformsDirty = false;
+}
+
+
+// This assumes the shader manager has already setup the correct shader program
+void QGL2PaintEngineExPrivate::updateMatrix()
+{
+// qDebug("QGL2PaintEngineExPrivate::updateMatrix()");
+
+ const QTransform& transform = q->state()->matrix;
+
+ // The projection matrix converts from Qt's coordinate system to GL's coordinate system
+ // * GL's viewport is 2x2, Qt's is width x height
+ // * GL has +y -> -y going from bottom -> top, Qt is the other way round
+ // * GL has [0,0] in the center, Qt has it in the top-left
+ //
+ // This results in the Projection matrix below, which is multiplied by the painter's
+ // transformation matrix, as shown below:
+ //
+ // Projection Matrix Painter Transform
+ // ------------------------------------------------ ------------------------
+ // | 2.0 / width | 0.0 | -1.0 | | m11 | m21 | dx |
+ // | 0.0 | -2.0 / height | 1.0 | * | m12 | m22 | dy |
+ // | 0.0 | 0.0 | 1.0 | | m13 | m23 | m33 |
+ // ------------------------------------------------ ------------------------
+ //
+ // NOTE: The resultant matrix is also transposed, as GL expects column-major matracies
+
+ const GLfloat wfactor = 2.0f / width;
+ GLfloat hfactor = -2.0f / height;
+
+ GLfloat dx = transform.dx();
+ GLfloat dy = transform.dy();
+
+ if (device->isFlipped()) {
+ hfactor *= -1;
+ dy -= height;
+ }
+
+ // Non-integer translates can have strange effects for some rendering operations such as
+ // anti-aliased text rendering. In such cases, we snap the translate to the pixel grid.
+ if (snapToPixelGrid && transform.type() == QTransform::TxTranslate) {
+ // 0.50 needs to rounded down to 0.0 for consistency with raster engine:
+ dx = ceilf(dx - 0.5f);
+ dy = ceilf(dy - 0.5f);
+ }
+ pmvMatrix[0][0] = (wfactor * transform.m11()) - transform.m13();
+ pmvMatrix[1][0] = (wfactor * transform.m21()) - transform.m23();
+ pmvMatrix[2][0] = (wfactor * dx) - transform.m33();
+ pmvMatrix[0][1] = (hfactor * transform.m12()) + transform.m13();
+ pmvMatrix[1][1] = (hfactor * transform.m22()) + transform.m23();
+ pmvMatrix[2][1] = (hfactor * dy) + transform.m33();
+ pmvMatrix[0][2] = transform.m13();
+ pmvMatrix[1][2] = transform.m23();
+ pmvMatrix[2][2] = transform.m33();
+
+ // 1/10000 == 0.0001, so we have good enough res to cover curves
+ // that span the entire widget...
+ inverseScale = qMax(1 / qMax( qMax(qAbs(transform.m11()), qAbs(transform.m22())),
+ qMax(qAbs(transform.m12()), qAbs(transform.m21())) ),
+ qreal(0.0001));
+
+ matrixDirty = false;
+ matrixUniformDirty = true;
+
+ // Set the PMV matrix attribute. As we use an attributes rather than uniforms, we only
+ // need to do this once for every matrix change and persists across all shader programs.
+ glVertexAttrib3fv(QT_PMV_MATRIX_1_ATTR, pmvMatrix[0]);
+ glVertexAttrib3fv(QT_PMV_MATRIX_2_ATTR, pmvMatrix[1]);
+ glVertexAttrib3fv(QT_PMV_MATRIX_3_ATTR, pmvMatrix[2]);
+
+ dasher.setInvScale(inverseScale);
+ stroker.setInvScale(inverseScale);
+}
+
+
+void QGL2PaintEngineExPrivate::updateCompositionMode()
+{
+ // NOTE: The entire paint engine works on pre-multiplied data - which is why some of these
+ // composition modes look odd.
+// qDebug() << "QGL2PaintEngineExPrivate::updateCompositionMode() - Setting GL composition mode for " << q->state()->composition_mode;
+ switch(q->state()->composition_mode) {
+ case QPainter::CompositionMode_SourceOver:
+ glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
+ break;
+ case QPainter::CompositionMode_DestinationOver:
+ glBlendFunc(GL_ONE_MINUS_DST_ALPHA, GL_ONE);
+ break;
+ case QPainter::CompositionMode_Clear:
+ glBlendFunc(GL_ZERO, GL_ZERO);
+ break;
+ case QPainter::CompositionMode_Source:
+ glBlendFunc(GL_ONE, GL_ZERO);
+ break;
+ case QPainter::CompositionMode_Destination:
+ glBlendFunc(GL_ZERO, GL_ONE);
+ break;
+ case QPainter::CompositionMode_SourceIn:
+ glBlendFunc(GL_DST_ALPHA, GL_ZERO);
+ break;
+ case QPainter::CompositionMode_DestinationIn:
+ glBlendFunc(GL_ZERO, GL_SRC_ALPHA);
+ break;
+ case QPainter::CompositionMode_SourceOut:
+ glBlendFunc(GL_ONE_MINUS_DST_ALPHA, GL_ZERO);
+ break;
+ case QPainter::CompositionMode_DestinationOut:
+ glBlendFunc(GL_ZERO, GL_ONE_MINUS_SRC_ALPHA);
+ break;
+ case QPainter::CompositionMode_SourceAtop:
+ glBlendFunc(GL_DST_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+ break;
+ case QPainter::CompositionMode_DestinationAtop:
+ glBlendFunc(GL_ONE_MINUS_DST_ALPHA, GL_SRC_ALPHA);
+ break;
+ case QPainter::CompositionMode_Xor:
+ glBlendFunc(GL_ONE_MINUS_DST_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+ break;
+ case QPainter::CompositionMode_Plus:
+ glBlendFunc(GL_ONE, GL_ONE);
+ break;
+ default:
+ qWarning("Unsupported composition mode");
+ break;
+ }
+
+ compositionModeDirty = false;
+}
+
+static inline void setCoords(GLfloat *coords, const QGLRect &rect)
+{
+ coords[0] = rect.left;
+ coords[1] = rect.top;
+ coords[2] = rect.right;
+ coords[3] = rect.top;
+ coords[4] = rect.right;
+ coords[5] = rect.bottom;
+ coords[6] = rect.left;
+ coords[7] = rect.bottom;
+}
+
+void QGL2PaintEngineExPrivate::drawTexture(const QGLRect& dest, const QGLRect& src, const QSize &textureSize, bool opaque, bool pattern)
+{
+ // Setup for texture drawing
+ currentBrush = noBrush;
+ shaderManager->setSrcPixelType(pattern ? QGLEngineShaderManager::PatternSrc : QGLEngineShaderManager::ImageSrc);
+
+ if (snapToPixelGrid) {
+ snapToPixelGrid = false;
+ matrixDirty = true;
+ }
+
+ if (prepareForDraw(opaque))
+ shaderManager->currentProgram()->setUniformValue(location(QGLEngineShaderManager::ImageTexture), QT_IMAGE_TEXTURE_UNIT);
+
+ if (pattern) {
+ QColor col = qt_premultiplyColor(q->state()->pen.color(), (GLfloat)q->state()->opacity);
+ shaderManager->currentProgram()->setUniformValue(location(QGLEngineShaderManager::PatternColor), col);
+ }
+
+ GLfloat dx = 1.0 / textureSize.width();
+ GLfloat dy = 1.0 / textureSize.height();
+
+ QGLRect srcTextureRect(src.left*dx, src.top*dy, src.right*dx, src.bottom*dy);
+
+ setCoords(staticVertexCoordinateArray, dest);
+ setCoords(staticTextureCoordinateArray, srcTextureRect);
+
+ glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
+}
+
+void QGL2PaintEngineEx::beginNativePainting()
+{
+ Q_D(QGL2PaintEngineEx);
+ ensureActive();
+ d->transferMode(BrushDrawingMode);
+
+ d->nativePaintingActive = true;
+
+ QGLContext *ctx = d->ctx;
+ glUseProgram(0);
+
+ // Disable all the vertex attribute arrays:
+ for (int i = 0; i < QT_GL_VERTEX_ARRAY_TRACKED_COUNT; ++i)
+ glDisableVertexAttribArray(i);
+
+#ifndef QT_OPENGL_ES_2
+ const QGLFormat &fmt = d->device->format();
+ if (fmt.majorVersion() < 3 || (fmt.majorVersion() == 3 && fmt.minorVersion() < 1)
+ || fmt.profile() == QGLFormat::CompatibilityProfile)
+ {
+ // be nice to people who mix OpenGL 1.x code with QPainter commands
+ // by setting modelview and projection matrices to mirror the GL 1
+ // paint engine
+ const QTransform& mtx = state()->matrix;
+
+ float mv_matrix[4][4] =
+ {
+ { float(mtx.m11()), float(mtx.m12()), 0, float(mtx.m13()) },
+ { float(mtx.m21()), float(mtx.m22()), 0, float(mtx.m23()) },
+ { 0, 0, 1, 0 },
+ { float(mtx.dx()), float(mtx.dy()), 0, float(mtx.m33()) }
+ };
+
+ const QSize sz = d->device->size();
+
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ glOrtho(0, sz.width(), sz.height(), 0, -999999, 999999);
+
+ glMatrixMode(GL_MODELVIEW);
+ glLoadMatrixf(&mv_matrix[0][0]);
+ }
+#else
+ Q_UNUSED(ctx);
+#endif
+
+ d->lastTextureUsed = GLuint(-1);
+ d->dirtyStencilRegion = QRect(0, 0, d->width, d->height);
+ d->resetGLState();
+
+ d->shaderManager->setDirty();
+
+ d->needsSync = true;
+}
+
+void QGL2PaintEngineExPrivate::resetGLState()
+{
+ glDisable(GL_BLEND);
+ glActiveTexture(GL_TEXTURE0);
+ glDisable(GL_STENCIL_TEST);
+ glDisable(GL_DEPTH_TEST);
+ glDisable(GL_SCISSOR_TEST);
+ glDepthMask(true);
+ glDepthFunc(GL_LESS);
+ glClearDepth(1);
+ glStencilMask(0xff);
+ glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
+ glStencilFunc(GL_ALWAYS, 0, 0xff);
+ ctx->d_func()->setVertexAttribArrayEnabled(QT_TEXTURE_COORDS_ATTR, false);
+ ctx->d_func()->setVertexAttribArrayEnabled(QT_VERTEX_COORDS_ATTR, false);
+ ctx->d_func()->setVertexAttribArrayEnabled(QT_OPACITY_ATTR, false);
+#ifndef QT_OPENGL_ES_2
+ // gl_Color, corresponding to vertex attribute 3, may have been changed
+ float color[] = { 1.0f, 1.0f, 1.0f, 1.0f };
+ glVertexAttrib4fv(3, color);
+#endif
+}
+
+void QGL2PaintEngineEx::endNativePainting()
+{
+ Q_D(QGL2PaintEngineEx);
+ d->needsSync = true;
+ d->nativePaintingActive = false;
+}
+
+void QGL2PaintEngineEx::invalidateState()
+{
+ Q_D(QGL2PaintEngineEx);
+ d->needsSync = true;
+}
+
+bool QGL2PaintEngineEx::isNativePaintingActive() const {
+ Q_D(const QGL2PaintEngineEx);
+ return d->nativePaintingActive;
+}
+
+void QGL2PaintEngineExPrivate::transferMode(EngineMode newMode)
+{
+ if (newMode == mode)
+ return;
+
+ if (mode == TextDrawingMode || mode == ImageDrawingMode || mode == ImageArrayDrawingMode) {
+ lastTextureUsed = GLuint(-1);
+ }
+
+ if (newMode == TextDrawingMode) {
+ shaderManager->setHasComplexGeometry(true);
+ } else {
+ shaderManager->setHasComplexGeometry(false);
+ }
+
+ if (newMode == ImageDrawingMode) {
+ setVertexAttributePointer(QT_VERTEX_COORDS_ATTR, staticVertexCoordinateArray);
+ setVertexAttributePointer(QT_TEXTURE_COORDS_ATTR, staticTextureCoordinateArray);
+ }
+
+ if (newMode == ImageArrayDrawingMode) {
+ setVertexAttributePointer(QT_VERTEX_COORDS_ATTR, (GLfloat*)vertexCoordinateArray.data());
+ setVertexAttributePointer(QT_TEXTURE_COORDS_ATTR, (GLfloat*)textureCoordinateArray.data());
+ setVertexAttributePointer(QT_OPACITY_ATTR, (GLfloat*)opacityArray.data());
+ }
+
+ // This needs to change when we implement high-quality anti-aliasing...
+ if (newMode != TextDrawingMode)
+ shaderManager->setMaskType(QGLEngineShaderManager::NoMask);
+
+ mode = newMode;
+}
+
+struct QGL2PEVectorPathCache
+{
+#ifdef QT_OPENGL_CACHE_AS_VBOS
+ GLuint vbo;
+ GLuint ibo;
+#else
+ float *vertices;
+ void *indices;
+#endif
+ int vertexCount;
+ int indexCount;
+ GLenum primitiveType;
+ qreal iscale;
+};
+
+void QGL2PaintEngineExPrivate::cleanupVectorPath(QPaintEngineEx *engine, void *data)
+{
+ QGL2PEVectorPathCache *c = (QGL2PEVectorPathCache *) data;
+#ifdef QT_OPENGL_CACHE_AS_VBOS
+ Q_ASSERT(engine->type() == QPaintEngine::OpenGL2);
+ static_cast<QGL2PaintEngineEx *>(engine)->d_func()->unusedVBOSToClean << c->vbo;
+ if (c->ibo)
+ d->unusedIBOSToClean << c->ibo;
+#else
+ Q_UNUSED(engine);
+ qFree(c->vertices);
+ qFree(c->indices);
+#endif
+ delete c;
+}
+
+// Assumes everything is configured for the brush you want to use
+void QGL2PaintEngineExPrivate::fill(const QVectorPath& path)
+{
+ transferMode(BrushDrawingMode);
+
+ if (snapToPixelGrid) {
+ snapToPixelGrid = false;
+ matrixDirty = true;
+ }
+
+ // Might need to call updateMatrix to re-calculate inverseScale
+ if (matrixDirty)
+ updateMatrix();
+
+ const QPointF* const points = reinterpret_cast<const QPointF*>(path.points());
+
+ // Check to see if there's any hints
+ if (path.shape() == QVectorPath::RectangleHint) {
+ QGLRect rect(points[0].x(), points[0].y(), points[2].x(), points[2].y());
+ prepareForDraw(currentBrush.isOpaque());
+ composite(rect);
+ } else if (path.isConvex()) {
+
+ if (path.isCacheable()) {
+ QVectorPath::CacheEntry *data = path.lookupCacheData(q);
+ QGL2PEVectorPathCache *cache;
+
+ bool updateCache = false;
+
+ if (data) {
+ cache = (QGL2PEVectorPathCache *) data->data;
+ // Check if scale factor is exceeded for curved paths and generate curves if so...
+ if (path.isCurved()) {
+ qreal scaleFactor = cache->iscale / inverseScale;
+ if (scaleFactor < 0.5 || scaleFactor > 2.0) {
+#ifdef QT_OPENGL_CACHE_AS_VBOS
+ glDeleteBuffers(1, &cache->vbo);
+ cache->vbo = 0;
+ Q_ASSERT(cache->ibo == 0);
+#else
+ qFree(cache->vertices);
+ Q_ASSERT(cache->indices == 0);
+#endif
+ updateCache = true;
+ }
+ }
+ } else {
+ cache = new QGL2PEVectorPathCache;
+ data = const_cast<QVectorPath &>(path).addCacheData(q, cache, cleanupVectorPath);
+ updateCache = true;
+ }
+
+ // Flatten the path at the current scale factor and fill it into the cache struct.
+ if (updateCache) {
+ vertexCoordinateArray.clear();
+ vertexCoordinateArray.addPath(path, inverseScale, false);
+ int vertexCount = vertexCoordinateArray.vertexCount();
+ int floatSizeInBytes = vertexCount * 2 * sizeof(float);
+ cache->vertexCount = vertexCount;
+ cache->indexCount = 0;
+ cache->primitiveType = GL_TRIANGLE_FAN;
+ cache->iscale = inverseScale;
+#ifdef QT_OPENGL_CACHE_AS_VBOS
+ glGenBuffers(1, &cache->vbo);
+ glBindBuffer(GL_ARRAY_BUFFER, cache->vbo);
+ glBufferData(GL_ARRAY_BUFFER, floatSizeInBytes, vertexCoordinateArray.data(), GL_STATIC_DRAW);
+ cache->ibo = 0;
+#else
+ cache->vertices = (float *) qMalloc(floatSizeInBytes);
+ memcpy(cache->vertices, vertexCoordinateArray.data(), floatSizeInBytes);
+ cache->indices = 0;
+#endif
+ }
+
+ prepareForDraw(currentBrush.isOpaque());
+#ifdef QT_OPENGL_CACHE_AS_VBOS
+ glBindBuffer(GL_ARRAY_BUFFER, cache->vbo);
+ setVertexAttributePointer(QT_VERTEX_COORDS_ATTR, 0);
+#else
+ setVertexAttributePointer(QT_VERTEX_COORDS_ATTR, cache->vertices);
+#endif
+ glDrawArrays(cache->primitiveType, 0, cache->vertexCount);
+
+ } else {
+ // printf(" - Marking path as cachable...\n");
+ // Tag it for later so that if the same path is drawn twice, it is assumed to be static and thus cachable
+ path.makeCacheable();
+ vertexCoordinateArray.clear();
+ vertexCoordinateArray.addPath(path, inverseScale, false);
+ prepareForDraw(currentBrush.isOpaque());
+ drawVertexArrays(vertexCoordinateArray, GL_TRIANGLE_FAN);
+ }
+
+ } else {
+ bool useCache = path.isCacheable();
+ if (useCache) {
+ QRectF bbox = path.controlPointRect();
+ // If the path doesn't fit within these limits, it is possible that the triangulation will fail.
+ useCache &= (bbox.left() > -0x8000 * inverseScale)
+ && (bbox.right() < 0x8000 * inverseScale)
+ && (bbox.top() > -0x8000 * inverseScale)
+ && (bbox.bottom() < 0x8000 * inverseScale);
+ }
+
+ if (useCache) {
+ QVectorPath::CacheEntry *data = path.lookupCacheData(q);
+ QGL2PEVectorPathCache *cache;
+
+ bool updateCache = false;
+
+ if (data) {
+ cache = (QGL2PEVectorPathCache *) data->data;
+ // Check if scale factor is exceeded for curved paths and generate curves if so...
+ if (path.isCurved()) {
+ qreal scaleFactor = cache->iscale / inverseScale;
+ if (scaleFactor < 0.5 || scaleFactor > 2.0) {
+#ifdef QT_OPENGL_CACHE_AS_VBOS
+ glDeleteBuffers(1, &cache->vbo);
+ glDeleteBuffers(1, &cache->ibo);
+#else
+ qFree(cache->vertices);
+ qFree(cache->indices);
+#endif
+ updateCache = true;
+ }
+ }
+ } else {
+ cache = new QGL2PEVectorPathCache;
+ data = const_cast<QVectorPath &>(path).addCacheData(q, cache, cleanupVectorPath);
+ updateCache = true;
+ }
+
+ // Flatten the path at the current scale factor and fill it into the cache struct.
+ if (updateCache) {
+ QTriangleSet polys = qTriangulate(path, QTransform().scale(1 / inverseScale, 1 / inverseScale));
+ cache->vertexCount = polys.vertices.size() / 2;
+ cache->indexCount = polys.indices.size();
+ cache->primitiveType = GL_TRIANGLES;
+ cache->iscale = inverseScale;
+#ifdef QT_OPENGL_CACHE_AS_VBOS
+ glGenBuffers(1, &cache->vbo);
+ glGenBuffers(1, &cache->ibo);
+ glBindBuffer(GL_ARRAY_BUFFER, cache->vbo);
+ glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, cache->ibo);
+
+ if (QGLExtensions::glExtensions() & QGLExtensions::ElementIndexUint)
+ glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(quint32) * polys.indices.size(), polys.indices.data(), GL_STATIC_DRAW);
+ else
+ glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(quint16) * polys.indices.size(), polys.indices.data(), GL_STATIC_DRAW);
+
+ QVarLengthArray<float> vertices(polys.vertices.size());
+ for (int i = 0; i < polys.vertices.size(); ++i)
+ vertices[i] = float(inverseScale * polys.vertices.at(i));
+ glBufferData(GL_ARRAY_BUFFER, sizeof(float) * vertices.size(), vertices.data(), GL_STATIC_DRAW);
+#else
+ cache->vertices = (float *) qMalloc(sizeof(float) * polys.vertices.size());
+ if (QGLExtensions::glExtensions() & QGLExtensions::ElementIndexUint) {
+ cache->indices = (quint32 *) qMalloc(sizeof(quint32) * polys.indices.size());
+ memcpy(cache->indices, polys.indices.data(), sizeof(quint32) * polys.indices.size());
+ } else {
+ cache->indices = (quint16 *) qMalloc(sizeof(quint16) * polys.indices.size());
+ memcpy(cache->indices, polys.indices.data(), sizeof(quint16) * polys.indices.size());
+ }
+ for (int i = 0; i < polys.vertices.size(); ++i)
+ cache->vertices[i] = float(inverseScale * polys.vertices.at(i));
+#endif
+ }
+
+ prepareForDraw(currentBrush.isOpaque());
+#ifdef QT_OPENGL_CACHE_AS_VBOS
+ glBindBuffer(GL_ARRAY_BUFFER, cache->vbo);
+ glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, cache->ibo);
+ setVertexAttributePointer(QT_VERTEX_COORDS_ATTR, 0);
+ if (QGLExtensions::glExtensions() & QGLExtensions::ElementIndexUint)
+ glDrawElements(cache->primitiveType, cache->indexCount, GL_UNSIGNED_INT, 0);
+ else
+ glDrawElements(cache->primitiveType, cache->indexCount, GL_UNSIGNED_SHORT, 0);
+ glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+ glBindBuffer(GL_ARRAY_BUFFER, 0);
+#else
+ setVertexAttributePointer(QT_VERTEX_COORDS_ATTR, cache->vertices);
+ if (QGLExtensions::glExtensions() & QGLExtensions::ElementIndexUint)
+ glDrawElements(cache->primitiveType, cache->indexCount, GL_UNSIGNED_INT, (qint32 *)cache->indices);
+ else
+ glDrawElements(cache->primitiveType, cache->indexCount, GL_UNSIGNED_SHORT, (qint16 *)cache->indices);
+#endif
+
+ } else {
+ // printf(" - Marking path as cachable...\n");
+ // Tag it for later so that if the same path is drawn twice, it is assumed to be static and thus cachable
+ path.makeCacheable();
+
+ if (!device->format().stencil()) {
+ // If there is no stencil buffer, triangulate the path instead.
+
+ QRectF bbox = path.controlPointRect();
+ // If the path doesn't fit within these limits, it is possible that the triangulation will fail.
+ bool withinLimits = (bbox.left() > -0x8000 * inverseScale)
+ && (bbox.right() < 0x8000 * inverseScale)
+ && (bbox.top() > -0x8000 * inverseScale)
+ && (bbox.bottom() < 0x8000 * inverseScale);
+ if (withinLimits) {
+ QTriangleSet polys = qTriangulate(path, QTransform().scale(1 / inverseScale, 1 / inverseScale));
+
+ QVarLengthArray<float> vertices(polys.vertices.size());
+ for (int i = 0; i < polys.vertices.size(); ++i)
+ vertices[i] = float(inverseScale * polys.vertices.at(i));
+
+ prepareForDraw(currentBrush.isOpaque());
+ setVertexAttributePointer(QT_VERTEX_COORDS_ATTR, vertices.constData());
+ if (QGLExtensions::glExtensions() & QGLExtensions::ElementIndexUint)
+ glDrawElements(GL_TRIANGLES, polys.indices.size(), GL_UNSIGNED_INT, polys.indices.data());
+ else
+ glDrawElements(GL_TRIANGLES, polys.indices.size(), GL_UNSIGNED_SHORT, polys.indices.data());
+ } else {
+ // We can't handle big, concave painter paths with OpenGL without stencil buffer.
+ qWarning("Painter path exceeds +/-32767 pixels.");
+ }
+ return;
+ }
+
+ // The path is too complicated & needs the stencil technique
+ vertexCoordinateArray.clear();
+ vertexCoordinateArray.addPath(path, inverseScale, false);
+
+ fillStencilWithVertexArray(vertexCoordinateArray, path.hasWindingFill());
+
+ glStencilMask(0xff);
+ glStencilOp(GL_KEEP, GL_REPLACE, GL_REPLACE);
+
+ if (q->state()->clipTestEnabled) {
+ // Pass when high bit is set, replace stencil value with current clip
+ glStencilFunc(GL_NOTEQUAL, q->state()->currentClip, GL_STENCIL_HIGH_BIT);
+ } else if (path.hasWindingFill()) {
+ // Pass when any bit is set, replace stencil value with 0
+ glStencilFunc(GL_NOTEQUAL, 0, 0xff);
+ } else {
+ // Pass when high bit is set, replace stencil value with 0
+ glStencilFunc(GL_NOTEQUAL, 0, GL_STENCIL_HIGH_BIT);
+ }
+ prepareForDraw(currentBrush.isOpaque());
+
+ // Stencil the brush onto the dest buffer
+ composite(vertexCoordinateArray.boundingRect());
+ glStencilMask(0);
+ updateClipScissorTest();
+ }
+ }
+}
+
+
+void QGL2PaintEngineExPrivate::fillStencilWithVertexArray(const float *data,
+ int count,
+ int *stops,
+ int stopCount,
+ const QGLRect &bounds,
+ StencilFillMode mode)
+{
+ Q_ASSERT(count || stops);
+
+// qDebug("QGL2PaintEngineExPrivate::fillStencilWithVertexArray()");
+ glStencilMask(0xff); // Enable stencil writes
+
+ if (dirtyStencilRegion.intersects(currentScissorBounds)) {
+ QVector<QRect> clearRegion = dirtyStencilRegion.intersected(currentScissorBounds).rects();
+ glClearStencil(0); // Clear to zero
+ for (int i = 0; i < clearRegion.size(); ++i) {
+#ifndef QT_GL_NO_SCISSOR_TEST
+ setScissor(clearRegion.at(i));
+#endif
+ glClear(GL_STENCIL_BUFFER_BIT);
+ }
+
+ dirtyStencilRegion -= currentScissorBounds;
+
+#ifndef QT_GL_NO_SCISSOR_TEST
+ updateClipScissorTest();
+#endif
+ }
+
+ glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE); // Disable color writes
+ useSimpleShader();
+ glEnable(GL_STENCIL_TEST); // For some reason, this has to happen _after_ the simple shader is use()'d
+
+ if (mode == WindingFillMode) {
+ Q_ASSERT(stops && !count);
+ if (q->state()->clipTestEnabled) {
+ // Flatten clip values higher than current clip, and set high bit to match current clip
+ glStencilFunc(GL_LEQUAL, GL_STENCIL_HIGH_BIT | q->state()->currentClip, ~GL_STENCIL_HIGH_BIT);
+ glStencilOp(GL_KEEP, GL_REPLACE, GL_REPLACE);
+ composite(bounds);
+
+ glStencilFunc(GL_EQUAL, GL_STENCIL_HIGH_BIT, GL_STENCIL_HIGH_BIT);
+ } else if (!stencilClean) {
+ // Clear stencil buffer within bounding rect
+ glStencilFunc(GL_ALWAYS, 0, 0xff);
+ glStencilOp(GL_ZERO, GL_ZERO, GL_ZERO);
+ composite(bounds);
+ }
+
+ // Inc. for front-facing triangle
+ glStencilOpSeparate(GL_FRONT, GL_KEEP, GL_INCR_WRAP, GL_INCR_WRAP);
+ // Dec. for back-facing "holes"
+ glStencilOpSeparate(GL_BACK, GL_KEEP, GL_DECR_WRAP, GL_DECR_WRAP);
+ glStencilMask(~GL_STENCIL_HIGH_BIT);
+ drawVertexArrays(data, stops, stopCount, GL_TRIANGLE_FAN);
+
+ if (q->state()->clipTestEnabled) {
+ // Clear high bit of stencil outside of path
+ glStencilFunc(GL_EQUAL, q->state()->currentClip, ~GL_STENCIL_HIGH_BIT);
+ glStencilOp(GL_KEEP, GL_REPLACE, GL_REPLACE);
+ glStencilMask(GL_STENCIL_HIGH_BIT);
+ composite(bounds);
+ }
+ } else if (mode == OddEvenFillMode) {
+ glStencilMask(GL_STENCIL_HIGH_BIT);
+ glStencilOp(GL_KEEP, GL_KEEP, GL_INVERT); // Simply invert the stencil bit
+ drawVertexArrays(data, stops, stopCount, GL_TRIANGLE_FAN);
+
+ } else { // TriStripStrokeFillMode
+ Q_ASSERT(count && !stops); // tristrips generated directly, so no vertexArray or stops
+ glStencilMask(GL_STENCIL_HIGH_BIT);
+#if 0
+ glStencilOp(GL_KEEP, GL_KEEP, GL_INVERT); // Simply invert the stencil bit
+ setVertexAttributePointer(QT_VERTEX_COORDS_ATTR, data);
+ glDrawArrays(GL_TRIANGLE_STRIP, 0, count);
+#else
+
+ glStencilOp(GL_KEEP, GL_KEEP, GL_REPLACE);
+ if (q->state()->clipTestEnabled) {
+ glStencilFunc(GL_LEQUAL, q->state()->currentClip | GL_STENCIL_HIGH_BIT,
+ ~GL_STENCIL_HIGH_BIT);
+ } else {
+ glStencilFunc(GL_ALWAYS, GL_STENCIL_HIGH_BIT, 0xff);
+ }
+ setVertexAttributePointer(QT_VERTEX_COORDS_ATTR, data);
+ glDrawArrays(GL_TRIANGLE_STRIP, 0, count);
+#endif
+ }
+
+ // Enable color writes & disable stencil writes
+ glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
+}
+
+/*
+ If the maximum value in the stencil buffer is GL_STENCIL_HIGH_BIT - 1,
+ restore the stencil buffer to a pristine state. The current clip region
+ is set to 1, and the rest to 0.
+*/
+void QGL2PaintEngineExPrivate::resetClipIfNeeded()
+{
+ if (maxClip != (GL_STENCIL_HIGH_BIT - 1))
+ return;
+
+ Q_Q(QGL2PaintEngineEx);
+
+ useSimpleShader();
+ glEnable(GL_STENCIL_TEST);
+ glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
+
+ QRectF bounds = q->state()->matrix.inverted().mapRect(QRectF(0, 0, width, height));
+ QGLRect rect(bounds.left(), bounds.top(), bounds.right(), bounds.bottom());
+
+ // Set high bit on clip region
+ glStencilFunc(GL_LEQUAL, q->state()->currentClip, 0xff);
+ glStencilOp(GL_KEEP, GL_INVERT, GL_INVERT);
+ glStencilMask(GL_STENCIL_HIGH_BIT);
+ composite(rect);
+
+ // Reset clipping to 1 and everything else to zero
+ glStencilFunc(GL_NOTEQUAL, 0x01, GL_STENCIL_HIGH_BIT);
+ glStencilOp(GL_ZERO, GL_REPLACE, GL_REPLACE);
+ glStencilMask(0xff);
+ composite(rect);
+
+ q->state()->currentClip = 1;
+ q->state()->canRestoreClip = false;
+
+ maxClip = 1;
+
+ glStencilMask(0x0);
+ glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
+}
+
+bool QGL2PaintEngineExPrivate::prepareForDraw(bool srcPixelsAreOpaque)
+{
+ if (brushTextureDirty && mode != ImageDrawingMode && mode != ImageArrayDrawingMode)
+ updateBrushTexture();
+
+ if (compositionModeDirty)
+ updateCompositionMode();
+
+ if (matrixDirty)
+ updateMatrix();
+
+ const bool stateHasOpacity = q->state()->opacity < 0.99f;
+ if (q->state()->composition_mode == QPainter::CompositionMode_Source
+ || (q->state()->composition_mode == QPainter::CompositionMode_SourceOver
+ && srcPixelsAreOpaque && !stateHasOpacity))
+ {
+ glDisable(GL_BLEND);
+ } else {
+ glEnable(GL_BLEND);
+ }
+
+ QGLEngineShaderManager::OpacityMode opacityMode;
+ if (mode == ImageArrayDrawingMode) {
+ opacityMode = QGLEngineShaderManager::AttributeOpacity;
+ } else {
+ opacityMode = stateHasOpacity ? QGLEngineShaderManager::UniformOpacity
+ : QGLEngineShaderManager::NoOpacity;
+ if (stateHasOpacity && (mode != ImageDrawingMode)) {
+ // Using a brush
+ bool brushIsPattern = (currentBrush.style() >= Qt::Dense1Pattern) &&
+ (currentBrush.style() <= Qt::DiagCrossPattern);
+
+ if ((currentBrush.style() == Qt::SolidPattern) || brushIsPattern)
+ opacityMode = QGLEngineShaderManager::NoOpacity; // Global opacity handled by srcPixel shader
+ }
+ }
+ shaderManager->setOpacityMode(opacityMode);
+
+ bool changed = shaderManager->useCorrectShaderProg();
+ // If the shader program needs changing, we change it and mark all uniforms as dirty
+ if (changed) {
+ // The shader program has changed so mark all uniforms as dirty:
+ brushUniformsDirty = true;
+ opacityUniformDirty = true;
+ matrixUniformDirty = true;
+ }
+
+ if (brushUniformsDirty && mode != ImageDrawingMode && mode != ImageArrayDrawingMode)
+ updateBrushUniforms();
+
+ if (opacityMode == QGLEngineShaderManager::UniformOpacity && opacityUniformDirty) {
+ shaderManager->currentProgram()->setUniformValue(location(QGLEngineShaderManager::GlobalOpacity), (GLfloat)q->state()->opacity);
+ opacityUniformDirty = false;
+ }
+
+ if (matrixUniformDirty && shaderManager->hasComplexGeometry()) {
+ shaderManager->currentProgram()->setUniformValue(location(QGLEngineShaderManager::Matrix),
+ pmvMatrix);
+ matrixUniformDirty = false;
+ }
+
+ return changed;
+}
+
+void QGL2PaintEngineExPrivate::composite(const QGLRect& boundingRect)
+{
+ setCoords(staticVertexCoordinateArray, boundingRect);
+ setVertexAttributePointer(QT_VERTEX_COORDS_ATTR, staticVertexCoordinateArray);
+ glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
+}
+
+// Draws the vertex array as a set of <vertexArrayStops.size()> triangle fans.
+void QGL2PaintEngineExPrivate::drawVertexArrays(const float *data, int *stops, int stopCount,
+ GLenum primitive)
+{
+ // Now setup the pointer to the vertex array:
+ setVertexAttributePointer(QT_VERTEX_COORDS_ATTR, (GLfloat*)data);
+
+ int previousStop = 0;
+ for (int i=0; i<stopCount; ++i) {
+ int stop = stops[i];
+/*
+ qDebug("Drawing triangle fan for vertecies %d -> %d:", previousStop, stop-1);
+ for (int i=previousStop; i<stop; ++i)
+ qDebug(" %02d: [%.2f, %.2f]", i, vertexArray.data()[i].x, vertexArray.data()[i].y);
+*/
+ glDrawArrays(primitive, previousStop, stop - previousStop);
+ previousStop = stop;
+ }
+}
+
+/////////////////////////////////// Public Methods //////////////////////////////////////////
+
+QGL2PaintEngineEx::QGL2PaintEngineEx()
+ : QPaintEngineEx(*(new QGL2PaintEngineExPrivate(this)))
+{
+}
+
+QGL2PaintEngineEx::~QGL2PaintEngineEx()
+{
+}
+
+void QGL2PaintEngineEx::fill(const QVectorPath &path, const QBrush &brush)
+{
+ Q_D(QGL2PaintEngineEx);
+
+ if (qbrush_style(brush) == Qt::NoBrush)
+ return;
+ ensureActive();
+ d->setBrush(brush);
+ d->fill(path);
+}
+
+Q_GUI_EXPORT bool qt_scaleForTransform(const QTransform &transform, qreal *scale); // qtransform.cpp
+
+
+void QGL2PaintEngineEx::stroke(const QVectorPath &path, const QPen &pen)
+{
+ Q_D(QGL2PaintEngineEx);
+
+ const QBrush &penBrush = qpen_brush(pen);
+ if (qpen_style(pen) == Qt::NoPen || qbrush_style(penBrush) == Qt::NoBrush)
+ return;
+
+ QOpenGL2PaintEngineState *s = state();
+ if (pen.isCosmetic() && !qt_scaleForTransform(s->transform(), 0)) {
+ // QTriangulatingStroker class is not meant to support cosmetically sheared strokes.
+ QPaintEngineEx::stroke(path, pen);
+ return;
+ }
+
+ ensureActive();
+ d->setBrush(penBrush);
+ d->stroke(path, pen);
+}
+
+void QGL2PaintEngineExPrivate::stroke(const QVectorPath &path, const QPen &pen)
+{
+ const QOpenGL2PaintEngineState *s = q->state();
+ if (snapToPixelGrid) {
+ snapToPixelGrid = false;
+ matrixDirty = true;
+ }
+
+ const Qt::PenStyle penStyle = qpen_style(pen);
+ const QBrush &penBrush = qpen_brush(pen);
+ const bool opaque = penBrush.isOpaque() && s->opacity > 0.99;
+
+ transferMode(BrushDrawingMode);
+
+ // updateMatrix() is responsible for setting the inverse scale on
+ // the strokers, so we need to call it here and not wait for
+ // prepareForDraw() down below.
+ updateMatrix();
+
+ QRectF clip = q->state()->matrix.inverted().mapRect(q->state()->clipEnabled
+ ? q->state()->rectangleClip
+ : QRectF(0, 0, width, height));
+
+ if (penStyle == Qt::SolidLine) {
+ stroker.process(path, pen, clip);
+
+ } else { // Some sort of dash
+ dasher.process(path, pen, clip);
+
+ QVectorPath dashStroke(dasher.points(),
+ dasher.elementCount(),
+ dasher.elementTypes());
+ stroker.process(dashStroke, pen, clip);
+ }
+
+ if (!stroker.vertexCount())
+ return;
+
+ if (opaque) {
+ prepareForDraw(opaque);
+ setVertexAttributePointer(QT_VERTEX_COORDS_ATTR, stroker.vertices());
+ glDrawArrays(GL_TRIANGLE_STRIP, 0, stroker.vertexCount() / 2);
+
+// QBrush b(Qt::green);
+// d->setBrush(&b);
+// d->prepareForDraw(true);
+// glDrawArrays(GL_LINE_STRIP, 0, d->stroker.vertexCount() / 2);
+
+ } else {
+ qreal width = qpen_widthf(pen) / 2;
+ if (width == 0)
+ width = 0.5;
+ qreal extra = pen.joinStyle() == Qt::MiterJoin
+ ? qMax(pen.miterLimit() * width, width)
+ : width;
+
+ if (pen.isCosmetic())
+ extra = extra * inverseScale;
+
+ QRectF bounds = path.controlPointRect().adjusted(-extra, -extra, extra, extra);
+
+ fillStencilWithVertexArray(stroker.vertices(), stroker.vertexCount() / 2,
+ 0, 0, bounds, QGL2PaintEngineExPrivate::TriStripStrokeFillMode);
+
+ glStencilOp(GL_KEEP, GL_REPLACE, GL_REPLACE);
+
+ // Pass when any bit is set, replace stencil value with 0
+ glStencilFunc(GL_NOTEQUAL, 0, GL_STENCIL_HIGH_BIT);
+ prepareForDraw(false);
+
+ // Stencil the brush onto the dest buffer
+ composite(bounds);
+
+ glStencilMask(0);
+
+ updateClipScissorTest();
+ }
+}
+
+void QGL2PaintEngineEx::penChanged() { }
+void QGL2PaintEngineEx::brushChanged() { }
+void QGL2PaintEngineEx::brushOriginChanged() { }
+
+void QGL2PaintEngineEx::opacityChanged()
+{
+// qDebug("QGL2PaintEngineEx::opacityChanged()");
+ Q_D(QGL2PaintEngineEx);
+ state()->opacityChanged = true;
+
+ Q_ASSERT(d->shaderManager);
+ d->brushUniformsDirty = true;
+ d->opacityUniformDirty = true;
+}
+
+void QGL2PaintEngineEx::compositionModeChanged()
+{
+// qDebug("QGL2PaintEngineEx::compositionModeChanged()");
+ Q_D(QGL2PaintEngineEx);
+ state()->compositionModeChanged = true;
+ d->compositionModeDirty = true;
+}
+
+void QGL2PaintEngineEx::renderHintsChanged()
+{
+ state()->renderHintsChanged = true;
+
+#if !defined(QT_OPENGL_ES_2)
+ if ((state()->renderHints & QPainter::Antialiasing)
+ || (state()->renderHints & QPainter::HighQualityAntialiasing))
+ glEnable(GL_MULTISAMPLE);
+ else
+ glDisable(GL_MULTISAMPLE);
+#endif
+
+ Q_D(QGL2PaintEngineEx);
+ d->lastTextureUsed = GLuint(-1);
+ d->brushTextureDirty = true;
+// qDebug("QGL2PaintEngineEx::renderHintsChanged() not implemented!");
+}
+
+void QGL2PaintEngineEx::transformChanged()
+{
+ Q_D(QGL2PaintEngineEx);
+ d->matrixDirty = true;
+ state()->matrixChanged = true;
+}
+
+
+static const QRectF scaleRect(const QRectF &r, qreal sx, qreal sy)
+{
+ return QRectF(r.x() * sx, r.y() * sy, r.width() * sx, r.height() * sy);
+}
+
+void QGL2PaintEngineEx::drawPixmap(const QRectF& dest, const QPixmap & pixmap, const QRectF & src)
+{
+ Q_D(QGL2PaintEngineEx);
+ QGLContext *ctx = d->ctx;
+
+ int max_texture_size = ctx->d_func()->maxTextureSize();
+ if (pixmap.width() > max_texture_size || pixmap.height() > max_texture_size) {
+ QPixmap scaled = pixmap.scaled(max_texture_size, max_texture_size, Qt::KeepAspectRatio);
+
+ const qreal sx = scaled.width() / qreal(pixmap.width());
+ const qreal sy = scaled.height() / qreal(pixmap.height());
+
+ drawPixmap(dest, scaled, scaleRect(src, sx, sy));
+ return;
+ }
+
+ ensureActive();
+ d->transferMode(ImageDrawingMode);
+
+ QGLContext::BindOptions bindOptions = QGLContext::InternalBindOption|QGLContext::CanFlipNativePixmapBindOption;
+#ifdef QGL_USE_TEXTURE_POOL
+ bindOptions |= QGLContext::TemporarilyCachedBindOption;
+#endif
+
+ glActiveTexture(GL_TEXTURE0 + QT_IMAGE_TEXTURE_UNIT);
+ QGLTexture *texture =
+ ctx->d_func()->bindTexture(pixmap, GL_TEXTURE_2D, GL_RGBA, bindOptions);
+
+ GLfloat top = texture->options & QGLContext::InvertedYBindOption ? (pixmap.height() - src.top()) : src.top();
+ GLfloat bottom = texture->options & QGLContext::InvertedYBindOption ? (pixmap.height() - src.bottom()) : src.bottom();
+ QGLRect srcRect(src.left(), top, src.right(), bottom);
+
+ bool isBitmap = pixmap.isQBitmap();
+ bool isOpaque = !isBitmap && !pixmap.hasAlpha();
+
+ d->updateTextureFilter(GL_TEXTURE_2D, GL_CLAMP_TO_EDGE,
+ state()->renderHints & QPainter::SmoothPixmapTransform, texture->id);
+ d->drawTexture(dest, srcRect, pixmap.size(), isOpaque, isBitmap);
+
+ if (texture->options&QGLContext::TemporarilyCachedBindOption) {
+ // pixmap was temporarily cached as a QImage texture by pooling system
+ // and should be destroyed immediately
+ QGLTextureCache::instance()->remove(ctx, texture->id);
+ }
+}
+
+void QGL2PaintEngineEx::drawImage(const QRectF& dest, const QImage& image, const QRectF& src,
+ Qt::ImageConversionFlags)
+{
+ Q_D(QGL2PaintEngineEx);
+ QGLContext *ctx = d->ctx;
+
+ int max_texture_size = ctx->d_func()->maxTextureSize();
+ if (image.width() > max_texture_size || image.height() > max_texture_size) {
+ QImage scaled = image.scaled(max_texture_size, max_texture_size, Qt::KeepAspectRatio);
+
+ const qreal sx = scaled.width() / qreal(image.width());
+ const qreal sy = scaled.height() / qreal(image.height());
+
+ drawImage(dest, scaled, scaleRect(src, sx, sy));
+ return;
+ }
+
+ ensureActive();
+ d->transferMode(ImageDrawingMode);
+
+ glActiveTexture(GL_TEXTURE0 + QT_IMAGE_TEXTURE_UNIT);
+
+ QGLContext::BindOptions bindOptions = QGLContext::InternalBindOption;
+#ifdef QGL_USE_TEXTURE_POOL
+ bindOptions |= QGLContext::TemporarilyCachedBindOption;
+#endif
+
+ QGLTexture *texture = ctx->d_func()->bindTexture(image, GL_TEXTURE_2D, GL_RGBA, bindOptions);
+ GLuint id = texture->id;
+
+ d->updateTextureFilter(GL_TEXTURE_2D, GL_CLAMP_TO_EDGE,
+ state()->renderHints & QPainter::SmoothPixmapTransform, id);
+ d->drawTexture(dest, src, image.size(), !image.hasAlphaChannel());
+
+ if (texture->options&QGLContext::TemporarilyCachedBindOption) {
+ // image was temporarily cached by texture pooling system
+ // and should be destroyed immediately
+ QGLTextureCache::instance()->remove(ctx, texture->id);
+ }
+}
+
+void QGL2PaintEngineEx::drawStaticTextItem(QStaticTextItem *textItem)
+{
+ Q_D(QGL2PaintEngineEx);
+
+ ensureActive();
+
+ QFontEngineGlyphCache::Type glyphType = textItem->fontEngine()->glyphFormat >= 0
+ ? QFontEngineGlyphCache::Type(textItem->fontEngine()->glyphFormat)
+ : d->glyphCacheType;
+ if (glyphType == QFontEngineGlyphCache::Raster_RGBMask) {
+ if (d->device->alphaRequested() || state()->matrix.type() > QTransform::TxTranslate
+ || (state()->composition_mode != QPainter::CompositionMode_Source
+ && state()->composition_mode != QPainter::CompositionMode_SourceOver))
+ {
+ glyphType = QFontEngineGlyphCache::Raster_A8;
+ }
+ }
+
+ d->drawCachedGlyphs(glyphType, textItem);
+}
+
+bool QGL2PaintEngineEx::drawTexture(const QRectF &dest, GLuint textureId, const QSize &size, const QRectF &src)
+{
+ Q_D(QGL2PaintEngineEx);
+ if (!d->shaderManager)
+ return false;
+
+ ensureActive();
+ d->transferMode(ImageDrawingMode);
+
+#ifndef QT_OPENGL_ES_2
+ QGLContext *ctx = d->ctx;
+#endif
+ glActiveTexture(GL_TEXTURE0 + QT_IMAGE_TEXTURE_UNIT);
+ glBindTexture(GL_TEXTURE_2D, textureId);
+
+ QGLRect srcRect(src.left(), src.bottom(), src.right(), src.top());
+
+ d->updateTextureFilter(GL_TEXTURE_2D, GL_CLAMP_TO_EDGE,
+ state()->renderHints & QPainter::SmoothPixmapTransform, textureId);
+ d->drawTexture(dest, srcRect, size, false);
+ return true;
+}
+
+void QGL2PaintEngineEx::drawTextItem(const QPointF &p, const QTextItem &textItem)
+{
+ Q_D(QGL2PaintEngineEx);
+
+ ensureActive();
+ QOpenGL2PaintEngineState *s = state();
+
+ const QTextItemInt &ti = static_cast<const QTextItemInt &>(textItem);
+
+ QTransform::TransformationType txtype = s->matrix.type();
+
+ float det = s->matrix.determinant();
+ bool drawCached = txtype < QTransform::TxProject;
+
+ // don't try to cache huge fonts or vastly transformed fonts
+ const qreal pixelSize = ti.fontEngine->fontDef.pixelSize;
+ if (pixelSize * pixelSize * qAbs(det) >= QT_MAX_CACHED_GLYPH_SIZE * QT_MAX_CACHED_GLYPH_SIZE ||
+ det < 0.25f || det > 4.f)
+ drawCached = false;
+
+ QFontEngineGlyphCache::Type glyphType = ti.fontEngine->glyphFormat >= 0
+ ? QFontEngineGlyphCache::Type(ti.fontEngine->glyphFormat)
+ : d->glyphCacheType;
+
+
+ if (glyphType == QFontEngineGlyphCache::Raster_RGBMask) {
+ if (d->device->alphaRequested() || txtype > QTransform::TxTranslate
+ || (state()->composition_mode != QPainter::CompositionMode_Source
+ && state()->composition_mode != QPainter::CompositionMode_SourceOver))
+ {
+ glyphType = QFontEngineGlyphCache::Raster_A8;
+ }
+ }
+
+ if (drawCached) {
+ QVarLengthArray<QFixedPoint> positions;
+ QVarLengthArray<glyph_t> glyphs;
+ QTransform matrix = QTransform::fromTranslate(p.x(), p.y());
+ ti.fontEngine->getGlyphPositions(ti.glyphs, matrix, ti.flags, glyphs, positions);
+
+ {
+ QStaticTextItem staticTextItem;
+ staticTextItem.chars = const_cast<QChar *>(ti.chars);
+ staticTextItem.setFontEngine(ti.fontEngine);
+ staticTextItem.glyphs = glyphs.data();
+ staticTextItem.numChars = ti.num_chars;
+ staticTextItem.numGlyphs = glyphs.size();
+ staticTextItem.glyphPositions = positions.data();
+
+ d->drawCachedGlyphs(glyphType, &staticTextItem);
+ }
+ return;
+ }
+
+ QPaintEngineEx::drawTextItem(p, ti);
+}
+
+namespace {
+
+ class QOpenGLStaticTextUserData: public QStaticTextUserData
+ {
+ public:
+ QOpenGLStaticTextUserData()
+ : QStaticTextUserData(OpenGLUserData), cacheSize(0, 0), cacheSerialNumber(0)
+ {
+ }
+
+ ~QOpenGLStaticTextUserData()
+ {
+ }
+
+ QSize cacheSize;
+ QGL2PEXVertexArray vertexCoordinateArray;
+ QGL2PEXVertexArray textureCoordinateArray;
+ QFontEngineGlyphCache::Type glyphType;
+ int cacheSerialNumber;
+ };
+
+}
+
+// #define QT_OPENGL_DRAWCACHEDGLYPHS_INDEX_ARRAY_VBO
+
+void QGL2PaintEngineExPrivate::drawCachedGlyphs(QFontEngineGlyphCache::Type glyphType,
+ QStaticTextItem *staticTextItem)
+{
+ Q_Q(QGL2PaintEngineEx);
+
+ QOpenGL2PaintEngineState *s = q->state();
+
+ void *cacheKey = const_cast<QGLContext *>(QGLContextPrivate::contextGroup(ctx)->context());
+ bool recreateVertexArrays = false;
+
+ QGLTextureGlyphCache *cache =
+ (QGLTextureGlyphCache *) staticTextItem->fontEngine()->glyphCache(cacheKey, glyphType, QTransform());
+ if (!cache || cache->cacheType() != glyphType || cache->context() == 0) {
+ cache = new QGLTextureGlyphCache(ctx, glyphType, QTransform());
+ staticTextItem->fontEngine()->setGlyphCache(cacheKey, cache);
+ cache->insert(ctx, cache);
+ recreateVertexArrays = true;
+ }
+
+ if (staticTextItem->userDataNeedsUpdate) {
+ recreateVertexArrays = true;
+ } else if (staticTextItem->userData() == 0) {
+ recreateVertexArrays = true;
+ } else if (staticTextItem->userData()->type != QStaticTextUserData::OpenGLUserData) {
+ recreateVertexArrays = true;
+ } else {
+ QOpenGLStaticTextUserData *userData = static_cast<QOpenGLStaticTextUserData *>(staticTextItem->userData());
+ if (userData->glyphType != glyphType) {
+ recreateVertexArrays = true;
+ } else if (userData->cacheSerialNumber != cache->serialNumber()) {
+ recreateVertexArrays = true;
+ }
+ }
+
+ // We only need to update the cache with new glyphs if we are actually going to recreate the vertex arrays.
+ // If the cache size has changed, we do need to regenerate the vertices, but we don't need to repopulate the
+ // cache so this text is performed before we test if the cache size has changed.
+ if (recreateVertexArrays) {
+ cache->setPaintEnginePrivate(this);
+ if (!cache->populate(staticTextItem->fontEngine(), staticTextItem->numGlyphs,
+ staticTextItem->glyphs, staticTextItem->glyphPositions)) {
+ // No space for glyphs in cache. We need to reset it and try again.
+ cache->clear();
+ cache->populate(staticTextItem->fontEngine(), staticTextItem->numGlyphs,
+ staticTextItem->glyphs, staticTextItem->glyphPositions);
+ }
+ cache->fillInPendingGlyphs();
+ }
+
+ if (cache->width() == 0 || cache->height() == 0)
+ return;
+
+ transferMode(TextDrawingMode);
+
+ int margin = cache->glyphMargin();
+
+ GLfloat dx = 1.0 / cache->width();
+ GLfloat dy = 1.0 / cache->height();
+
+ // Use global arrays by default
+ QGL2PEXVertexArray *vertexCoordinates = &vertexCoordinateArray;
+ QGL2PEXVertexArray *textureCoordinates = &textureCoordinateArray;
+
+ if (staticTextItem->useBackendOptimizations) {
+ QOpenGLStaticTextUserData *userData = 0;
+
+ if (staticTextItem->userData() == 0
+ || staticTextItem->userData()->type != QStaticTextUserData::OpenGLUserData) {
+
+ userData = new QOpenGLStaticTextUserData();
+ staticTextItem->setUserData(userData);
+
+ } else {
+ userData = static_cast<QOpenGLStaticTextUserData*>(staticTextItem->userData());
+ }
+
+ userData->glyphType = glyphType;
+ userData->cacheSerialNumber = cache->serialNumber();
+
+ // Use cache if backend optimizations is turned on
+ vertexCoordinates = &userData->vertexCoordinateArray;
+ textureCoordinates = &userData->textureCoordinateArray;
+
+ QSize size(cache->width(), cache->height());
+ if (userData->cacheSize != size) {
+ recreateVertexArrays = true;
+ userData->cacheSize = size;
+ }
+ }
+
+ if (recreateVertexArrays) {
+ vertexCoordinates->clear();
+ textureCoordinates->clear();
+
+ bool supportsSubPixelPositions = staticTextItem->fontEngine()->supportsSubPixelPositions();
+ for (int i=0; i<staticTextItem->numGlyphs; ++i) {
+ QFixed subPixelPosition;
+ if (supportsSubPixelPositions)
+ subPixelPosition = cache->subPixelPositionForX(staticTextItem->glyphPositions[i].x);
+
+ QTextureGlyphCache::GlyphAndSubPixelPosition glyph(staticTextItem->glyphs[i], subPixelPosition);
+
+ const QTextureGlyphCache::Coord &c = cache->coords[glyph];
+ if (c.isNull())
+ continue;
+
+ int x = qFloor(staticTextItem->glyphPositions[i].x) + c.baseLineX - margin;
+ int y = qFloor(staticTextItem->glyphPositions[i].y) - c.baseLineY - margin;
+
+ vertexCoordinates->addQuad(QRectF(x, y, c.w, c.h));
+ textureCoordinates->addQuad(QRectF(c.x*dx, c.y*dy, c.w * dx, c.h * dy));
+ }
+
+ staticTextItem->userDataNeedsUpdate = false;
+ }
+
+ int numGlyphs = vertexCoordinates->vertexCount() / 4;
+
+ if (elementIndices.size() < numGlyphs*6) {
+ Q_ASSERT(elementIndices.size() % 6 == 0);
+ int j = elementIndices.size() / 6 * 4;
+ while (j < numGlyphs*4) {
+ elementIndices.append(j + 0);
+ elementIndices.append(j + 0);
+ elementIndices.append(j + 1);
+ elementIndices.append(j + 2);
+ elementIndices.append(j + 3);
+ elementIndices.append(j + 3);
+
+ j += 4;
+ }
+
+#if defined(QT_OPENGL_DRAWCACHEDGLYPHS_INDEX_ARRAY_VBO)
+ if (elementIndicesVBOId == 0)
+ glGenBuffers(1, &elementIndicesVBOId);
+
+ glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, elementIndicesVBOId);
+ glBufferData(GL_ELEMENT_ARRAY_BUFFER, elementIndices.size() * sizeof(GLushort),
+ elementIndices.constData(), GL_STATIC_DRAW);
+#endif
+ } else {
+#if defined(QT_OPENGL_DRAWCACHEDGLYPHS_INDEX_ARRAY_VBO)
+ glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, elementIndicesVBOId);
+#endif
+ }
+
+ setVertexAttributePointer(QT_VERTEX_COORDS_ATTR, (GLfloat*)vertexCoordinates->data());
+ setVertexAttributePointer(QT_TEXTURE_COORDS_ATTR, (GLfloat*)textureCoordinates->data());
+
+ if (!snapToPixelGrid) {
+ snapToPixelGrid = true;
+ matrixDirty = true;
+ }
+
+ QBrush pensBrush = q->state()->pen.brush();
+ setBrush(pensBrush);
+
+ if (glyphType == QFontEngineGlyphCache::Raster_RGBMask) {
+
+ // Subpixel antialiasing without gamma correction
+
+ QPainter::CompositionMode compMode = q->state()->composition_mode;
+ Q_ASSERT(compMode == QPainter::CompositionMode_Source
+ || compMode == QPainter::CompositionMode_SourceOver);
+
+ shaderManager->setMaskType(QGLEngineShaderManager::SubPixelMaskPass1);
+
+ if (pensBrush.style() == Qt::SolidPattern) {
+ // Solid patterns can get away with only one pass.
+ QColor c = pensBrush.color();
+ qreal oldOpacity = q->state()->opacity;
+ if (compMode == QPainter::CompositionMode_Source) {
+ c = qt_premultiplyColor(c, q->state()->opacity);
+ q->state()->opacity = 1;
+ opacityUniformDirty = true;
+ }
+
+ compositionModeDirty = false; // I can handle this myself, thank you very much
+ prepareForDraw(false); // Text always causes src pixels to be transparent
+
+ // prepareForDraw() have set the opacity on the current shader, so the opacity state can now be reset.
+ if (compMode == QPainter::CompositionMode_Source) {
+ q->state()->opacity = oldOpacity;
+ opacityUniformDirty = true;
+ }
+
+ glEnable(GL_BLEND);
+ glBlendFunc(GL_CONSTANT_COLOR, GL_ONE_MINUS_SRC_COLOR);
+ glBlendColor(c.redF(), c.greenF(), c.blueF(), c.alphaF());
+ } else {
+ // Other brush styles need two passes.
+
+ qreal oldOpacity = q->state()->opacity;
+ if (compMode == QPainter::CompositionMode_Source) {
+ q->state()->opacity = 1;
+ opacityUniformDirty = true;
+ pensBrush = Qt::white;
+ setBrush(pensBrush);
+ }
+
+ compositionModeDirty = false; // I can handle this myself, thank you very much
+ prepareForDraw(false); // Text always causes src pixels to be transparent
+ glEnable(GL_BLEND);
+ glBlendFunc(GL_ZERO, GL_ONE_MINUS_SRC_COLOR);
+
+ glActiveTexture(GL_TEXTURE0 + QT_MASK_TEXTURE_UNIT);
+ glBindTexture(GL_TEXTURE_2D, cache->texture());
+ updateTextureFilter(GL_TEXTURE_2D, GL_REPEAT, false);
+
+#if defined(QT_OPENGL_DRAWCACHEDGLYPHS_INDEX_ARRAY_VBO)
+ glDrawElements(GL_TRIANGLE_STRIP, 6 * numGlyphs, GL_UNSIGNED_SHORT, 0);
+#else
+ glDrawElements(GL_TRIANGLE_STRIP, 6 * numGlyphs, GL_UNSIGNED_SHORT, elementIndices.data());
+#endif
+
+ shaderManager->setMaskType(QGLEngineShaderManager::SubPixelMaskPass2);
+
+ if (compMode == QPainter::CompositionMode_Source) {
+ q->state()->opacity = oldOpacity;
+ opacityUniformDirty = true;
+ pensBrush = q->state()->pen.brush();
+ setBrush(pensBrush);
+ }
+
+ compositionModeDirty = false;
+ prepareForDraw(false); // Text always causes src pixels to be transparent
+ glEnable(GL_BLEND);
+ glBlendFunc(GL_ONE, GL_ONE);
+ }
+ compositionModeDirty = true;
+ } else {
+ // Greyscale/mono glyphs
+
+ shaderManager->setMaskType(QGLEngineShaderManager::PixelMask);
+ prepareForDraw(false); // Text always causes src pixels to be transparent
+ }
+ //### TODO: Gamma correction
+
+ QGLTextureGlyphCache::FilterMode filterMode = (s->matrix.type() > QTransform::TxTranslate)?QGLTextureGlyphCache::Linear:QGLTextureGlyphCache::Nearest;
+ if (lastMaskTextureUsed != cache->texture() || cache->filterMode() != filterMode) {
+
+ glActiveTexture(GL_TEXTURE0 + QT_MASK_TEXTURE_UNIT);
+ if (lastMaskTextureUsed != cache->texture()) {
+ glBindTexture(GL_TEXTURE_2D, cache->texture());
+ lastMaskTextureUsed = cache->texture();
+ }
+
+ if (cache->filterMode() != filterMode) {
+ if (filterMode == QGLTextureGlyphCache::Linear) {
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ } else {
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ }
+ cache->setFilterMode(filterMode);
+ }
+ }
+
+#if defined(QT_OPENGL_DRAWCACHEDGLYPHS_INDEX_ARRAY_VBO)
+ glDrawElements(GL_TRIANGLE_STRIP, 6 * numGlyphs, GL_UNSIGNED_SHORT, 0);
+ glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+#else
+ glDrawElements(GL_TRIANGLE_STRIP, 6 * numGlyphs, GL_UNSIGNED_SHORT, elementIndices.data());
+#endif
+}
+
+void QGL2PaintEngineEx::drawPixmapFragments(const QPainter::PixmapFragment *fragments, int fragmentCount, const QPixmap &pixmap,
+ QPainter::PixmapFragmentHints hints)
+{
+ Q_D(QGL2PaintEngineEx);
+ // Use fallback for extended composition modes.
+ if (state()->composition_mode > QPainter::CompositionMode_Plus) {
+ QPaintEngineEx::drawPixmapFragments(fragments, fragmentCount, pixmap, hints);
+ return;
+ }
+
+ ensureActive();
+ int max_texture_size = d->ctx->d_func()->maxTextureSize();
+ if (pixmap.width() > max_texture_size || pixmap.height() > max_texture_size) {
+ QPixmap scaled = pixmap.scaled(max_texture_size, max_texture_size, Qt::KeepAspectRatio);
+ d->drawPixmapFragments(fragments, fragmentCount, scaled, hints);
+ } else {
+ d->drawPixmapFragments(fragments, fragmentCount, pixmap, hints);
+ }
+}
+
+
+void QGL2PaintEngineExPrivate::drawPixmapFragments(const QPainter::PixmapFragment *fragments,
+ int fragmentCount, const QPixmap &pixmap,
+ QPainter::PixmapFragmentHints hints)
+{
+ GLfloat dx = 1.0f / pixmap.size().width();
+ GLfloat dy = 1.0f / pixmap.size().height();
+
+ vertexCoordinateArray.clear();
+ textureCoordinateArray.clear();
+ opacityArray.reset();
+
+ if (snapToPixelGrid) {
+ snapToPixelGrid = false;
+ matrixDirty = true;
+ }
+
+ bool allOpaque = true;
+
+ for (int i = 0; i < fragmentCount; ++i) {
+ qreal s = 0;
+ qreal c = 1;
+ if (fragments[i].rotation != 0) {
+ s = qFastSin(fragments[i].rotation * Q_PI / 180);
+ c = qFastCos(fragments[i].rotation * Q_PI / 180);
+ }
+
+ qreal right = 0.5 * fragments[i].scaleX * fragments[i].width;
+ qreal bottom = 0.5 * fragments[i].scaleY * fragments[i].height;
+ QGLPoint bottomRight(right * c - bottom * s, right * s + bottom * c);
+ QGLPoint bottomLeft(-right * c - bottom * s, -right * s + bottom * c);
+
+ vertexCoordinateArray.addVertex(bottomRight.x + fragments[i].x, bottomRight.y + fragments[i].y);
+ vertexCoordinateArray.addVertex(-bottomLeft.x + fragments[i].x, -bottomLeft.y + fragments[i].y);
+ vertexCoordinateArray.addVertex(-bottomRight.x + fragments[i].x, -bottomRight.y + fragments[i].y);
+ vertexCoordinateArray.addVertex(-bottomRight.x + fragments[i].x, -bottomRight.y + fragments[i].y);
+ vertexCoordinateArray.addVertex(bottomLeft.x + fragments[i].x, bottomLeft.y + fragments[i].y);
+ vertexCoordinateArray.addVertex(bottomRight.x + fragments[i].x, bottomRight.y + fragments[i].y);
+
+ QGLRect src(fragments[i].sourceLeft * dx, fragments[i].sourceTop * dy,
+ (fragments[i].sourceLeft + fragments[i].width) * dx,
+ (fragments[i].sourceTop + fragments[i].height) * dy);
+
+ textureCoordinateArray.addVertex(src.right, src.bottom);
+ textureCoordinateArray.addVertex(src.right, src.top);
+ textureCoordinateArray.addVertex(src.left, src.top);
+ textureCoordinateArray.addVertex(src.left, src.top);
+ textureCoordinateArray.addVertex(src.left, src.bottom);
+ textureCoordinateArray.addVertex(src.right, src.bottom);
+
+ qreal opacity = fragments[i].opacity * q->state()->opacity;
+ opacityArray << opacity << opacity << opacity << opacity << opacity << opacity;
+ allOpaque &= (opacity >= 0.99f);
+ }
+
+ glActiveTexture(GL_TEXTURE0 + QT_IMAGE_TEXTURE_UNIT);
+ QGLTexture *texture = ctx->d_func()->bindTexture(pixmap, GL_TEXTURE_2D, GL_RGBA,
+ QGLContext::InternalBindOption
+ | QGLContext::CanFlipNativePixmapBindOption);
+
+ if (texture->options & QGLContext::InvertedYBindOption) {
+ // Flip texture y-coordinate.
+ QGLPoint *data = textureCoordinateArray.data();
+ for (int i = 0; i < 6 * fragmentCount; ++i)
+ data[i].y = 1 - data[i].y;
+ }
+
+ transferMode(ImageArrayDrawingMode);
+
+ bool isBitmap = pixmap.isQBitmap();
+ bool isOpaque = !isBitmap && (!pixmap.hasAlpha() || (hints & QPainter::OpaqueHint)) && allOpaque;
+
+ updateTextureFilter(GL_TEXTURE_2D, GL_CLAMP_TO_EDGE,
+ q->state()->renderHints & QPainter::SmoothPixmapTransform, texture->id);
+
+ // Setup for texture drawing
+ currentBrush = noBrush;
+ shaderManager->setSrcPixelType(isBitmap ? QGLEngineShaderManager::PatternSrc
+ : QGLEngineShaderManager::ImageSrc);
+ if (prepareForDraw(isOpaque))
+ shaderManager->currentProgram()->setUniformValue(location(QGLEngineShaderManager::ImageTexture), QT_IMAGE_TEXTURE_UNIT);
+
+ if (isBitmap) {
+ QColor col = qt_premultiplyColor(q->state()->pen.color(), (GLfloat)q->state()->opacity);
+ shaderManager->currentProgram()->setUniformValue(location(QGLEngineShaderManager::PatternColor), col);
+ }
+
+ glDrawArrays(GL_TRIANGLES, 0, 6 * fragmentCount);
+}
+
+bool QGL2PaintEngineEx::begin(QPaintDevice *pdev)
+{
+ Q_D(QGL2PaintEngineEx);
+
+// qDebug("QGL2PaintEngineEx::begin()");
+ if (pdev->devType() == QInternal::OpenGL)
+ d->device = static_cast<QGLPaintDevice*>(pdev);
+ else
+ d->device = QGLPaintDevice::getDevice(pdev);
+
+ if (!d->device)
+ return false;
+
+ d->ctx = d->device->context();
+ d->ctx->d_ptr->active_engine = this;
+
+ const QSize sz = d->device->size();
+ d->width = sz.width();
+ d->height = sz.height();
+ d->mode = BrushDrawingMode;
+ d->brushTextureDirty = true;
+ d->brushUniformsDirty = true;
+ d->matrixUniformDirty = true;
+ d->matrixDirty = true;
+ d->compositionModeDirty = true;
+ d->opacityUniformDirty = true;
+ d->needsSync = true;
+ d->useSystemClip = !systemClip().isEmpty();
+ d->currentBrush = QBrush();
+
+ d->dirtyStencilRegion = QRect(0, 0, d->width, d->height);
+ d->stencilClean = true;
+
+ // Calling begin paint should make the correct context current. So, any
+ // code which calls into GL or otherwise needs a current context *must*
+ // go after beginPaint:
+ d->device->beginPaint();
+
+#if !defined(QT_OPENGL_ES_2)
+ bool success = qt_resolve_version_2_0_functions(d->ctx)
+ && qt_resolve_buffer_extensions(d->ctx);
+ Q_ASSERT(success);
+ Q_UNUSED(success);
+#endif
+
+ d->shaderManager = new QGLEngineShaderManager(d->ctx);
+
+ glDisable(GL_STENCIL_TEST);
+ glDisable(GL_DEPTH_TEST);
+ glDisable(GL_SCISSOR_TEST);
+
+#if !defined(QT_OPENGL_ES_2)
+ glDisable(GL_MULTISAMPLE);
+#endif
+
+ d->glyphCacheType = QFontEngineGlyphCache::Raster_A8;
+
+#if !defined(QT_OPENGL_ES_2)
+#if defined(Q_WS_WIN)
+ if (qt_cleartype_enabled)
+#endif
+#if defined(Q_WS_MAC)
+ if (qt_applefontsmoothing_enabled)
+#endif
+ d->glyphCacheType = QFontEngineGlyphCache::Raster_RGBMask;
+#endif
+
+#if defined(QT_OPENGL_ES_2)
+ // OpenGL ES can't switch MSAA off, so if the gl paint device is
+ // multisampled, it's always multisampled.
+ d->multisamplingAlwaysEnabled = d->device->format().sampleBuffers();
+#else
+ d->multisamplingAlwaysEnabled = false;
+#endif
+
+ return true;
+}
+
+bool QGL2PaintEngineEx::end()
+{
+ Q_D(QGL2PaintEngineEx);
+ QGLContext *ctx = d->ctx;
+
+ glUseProgram(0);
+ d->transferMode(BrushDrawingMode);
+ d->device->endPaint();
+
+#if defined(Q_WS_X11)
+ // On some (probably all) drivers, deleting an X pixmap which has been bound to a texture
+ // before calling glFinish/swapBuffers renders garbage. Presumably this is because X deletes
+ // the pixmap behind the driver's back before it's had a chance to use it. To fix this, we
+ // reference all QPixmaps which have been bound to stop them being deleted and only deref
+ // them here, after swapBuffers, where they can be safely deleted.
+ ctx->d_func()->boundPixmaps.clear();
+#endif
+ d->ctx->d_ptr->active_engine = 0;
+
+ d->resetGLState();
+
+ delete d->shaderManager;
+ d->shaderManager = 0;
+ d->currentBrush = QBrush();
+
+#ifdef QT_OPENGL_CACHE_AS_VBOS
+ if (!d->unusedVBOSToClean.isEmpty()) {
+ glDeleteBuffers(d->unusedVBOSToClean.size(), d->unusedVBOSToClean.constData());
+ d->unusedVBOSToClean.clear();
+ }
+ if (!d->unusedIBOSToClean.isEmpty()) {
+ glDeleteBuffers(d->unusedIBOSToClean.size(), d->unusedIBOSToClean.constData());
+ d->unusedIBOSToClean.clear();
+ }
+#endif
+
+ return false;
+}
+
+void QGL2PaintEngineEx::ensureActive()
+{
+ Q_D(QGL2PaintEngineEx);
+ QGLContext *ctx = d->ctx;
+
+ if (isActive() && ctx->d_ptr->active_engine != this) {
+ ctx->d_ptr->active_engine = this;
+ d->needsSync = true;
+ }
+
+ d->device->ensureActiveTarget();
+
+ if (d->needsSync) {
+ d->transferMode(BrushDrawingMode);
+ glViewport(0, 0, d->width, d->height);
+ d->needsSync = false;
+ d->lastMaskTextureUsed = 0;
+ d->shaderManager->setDirty();
+ d->ctx->d_func()->syncGlState();
+ for (int i = 0; i < 3; ++i)
+ d->vertexAttribPointers[i] = (GLfloat*)-1; // Assume the pointers are clobbered
+ setState(state());
+ }
+}
+
+void QGL2PaintEngineExPrivate::updateClipScissorTest()
+{
+ Q_Q(QGL2PaintEngineEx);
+ if (q->state()->clipTestEnabled) {
+ glEnable(GL_STENCIL_TEST);
+ glStencilFunc(GL_LEQUAL, q->state()->currentClip, ~GL_STENCIL_HIGH_BIT);
+ } else {
+ glDisable(GL_STENCIL_TEST);
+ glStencilFunc(GL_ALWAYS, 0, 0xff);
+ }
+
+#ifdef QT_GL_NO_SCISSOR_TEST
+ currentScissorBounds = QRect(0, 0, width, height);
+#else
+ QRect bounds = q->state()->rectangleClip;
+ if (!q->state()->clipEnabled) {
+ if (useSystemClip)
+ bounds = systemClip.boundingRect();
+ else
+ bounds = QRect(0, 0, width, height);
+ } else {
+ if (useSystemClip)
+ bounds = bounds.intersected(systemClip.boundingRect());
+ else
+ bounds = bounds.intersected(QRect(0, 0, width, height));
+ }
+
+ currentScissorBounds = bounds;
+
+ if (bounds == QRect(0, 0, width, height)) {
+ glDisable(GL_SCISSOR_TEST);
+ } else {
+ glEnable(GL_SCISSOR_TEST);
+ setScissor(bounds);
+ }
+#endif
+}
+
+void QGL2PaintEngineExPrivate::setScissor(const QRect &rect)
+{
+ const int left = rect.left();
+ const int width = rect.width();
+ int bottom = height - (rect.top() + rect.height());
+ if (device->isFlipped()) {
+ bottom = rect.top();
+ }
+ const int height = rect.height();
+
+ glScissor(left, bottom, width, height);
+}
+
+void QGL2PaintEngineEx::clipEnabledChanged()
+{
+ Q_D(QGL2PaintEngineEx);
+
+ state()->clipChanged = true;
+
+ if (painter()->hasClipping())
+ d->regenerateClip();
+ else
+ d->systemStateChanged();
+}
+
+void QGL2PaintEngineExPrivate::clearClip(uint value)
+{
+ dirtyStencilRegion -= currentScissorBounds;
+
+ glStencilMask(0xff);
+ glClearStencil(value);
+ glClear(GL_STENCIL_BUFFER_BIT);
+ glStencilMask(0x0);
+
+ q->state()->needsClipBufferClear = false;
+}
+
+void QGL2PaintEngineExPrivate::writeClip(const QVectorPath &path, uint value)
+{
+ transferMode(BrushDrawingMode);
+
+ if (snapToPixelGrid) {
+ snapToPixelGrid = false;
+ matrixDirty = true;
+ }
+
+ if (matrixDirty)
+ updateMatrix();
+
+ stencilClean = false;
+
+ const bool singlePass = !path.hasWindingFill()
+ && (((q->state()->currentClip == maxClip - 1) && q->state()->clipTestEnabled)
+ || q->state()->needsClipBufferClear);
+ const uint referenceClipValue = q->state()->needsClipBufferClear ? 1 : q->state()->currentClip;
+
+ if (q->state()->needsClipBufferClear)
+ clearClip(1);
+
+ if (path.isEmpty()) {
+ glEnable(GL_STENCIL_TEST);
+ glStencilFunc(GL_LEQUAL, value, ~GL_STENCIL_HIGH_BIT);
+ return;
+ }
+
+ if (q->state()->clipTestEnabled)
+ glStencilFunc(GL_LEQUAL, q->state()->currentClip, ~GL_STENCIL_HIGH_BIT);
+ else
+ glStencilFunc(GL_ALWAYS, 0, 0xff);
+
+ vertexCoordinateArray.clear();
+ vertexCoordinateArray.addPath(path, inverseScale, false);
+
+ if (!singlePass)
+ fillStencilWithVertexArray(vertexCoordinateArray, path.hasWindingFill());
+
+ glColorMask(false, false, false, false);
+ glEnable(GL_STENCIL_TEST);
+ useSimpleShader();
+
+ if (singlePass) {
+ // Under these conditions we can set the new stencil value in a single
+ // pass, by using the current value and the "new value" as the toggles
+
+ glStencilFunc(GL_LEQUAL, referenceClipValue, ~GL_STENCIL_HIGH_BIT);
+ glStencilOp(GL_KEEP, GL_INVERT, GL_INVERT);
+ glStencilMask(value ^ referenceClipValue);
+
+ drawVertexArrays(vertexCoordinateArray, GL_TRIANGLE_FAN);
+ } else {
+ glStencilOp(GL_KEEP, GL_REPLACE, GL_REPLACE);
+ glStencilMask(0xff);
+
+ if (!q->state()->clipTestEnabled && path.hasWindingFill()) {
+ // Pass when any clip bit is set, set high bit
+ glStencilFunc(GL_NOTEQUAL, GL_STENCIL_HIGH_BIT, ~GL_STENCIL_HIGH_BIT);
+ composite(vertexCoordinateArray.boundingRect());
+ }
+
+ // Pass when high bit is set, replace stencil value with new clip value
+ glStencilFunc(GL_NOTEQUAL, value, GL_STENCIL_HIGH_BIT);
+
+ composite(vertexCoordinateArray.boundingRect());
+ }
+
+ glStencilFunc(GL_LEQUAL, value, ~GL_STENCIL_HIGH_BIT);
+ glStencilMask(0);
+
+ glColorMask(true, true, true, true);
+}
+
+void QGL2PaintEngineEx::clip(const QVectorPath &path, Qt::ClipOperation op)
+{
+// qDebug("QGL2PaintEngineEx::clip()");
+ Q_D(QGL2PaintEngineEx);
+
+ state()->clipChanged = true;
+
+ ensureActive();
+
+ if (op == Qt::ReplaceClip) {
+ op = Qt::IntersectClip;
+ if (d->hasClipOperations()) {
+ d->systemStateChanged();
+ state()->canRestoreClip = false;
+ }
+ }
+
+#ifndef QT_GL_NO_SCISSOR_TEST
+ if (!path.isEmpty() && op == Qt::IntersectClip && (path.shape() == QVectorPath::RectangleHint)) {
+ const QPointF* const points = reinterpret_cast<const QPointF*>(path.points());
+ QRectF rect(points[0], points[2]);
+
+ if (state()->matrix.type() <= QTransform::TxScale
+ || (state()->matrix.type() == QTransform::TxRotate
+ && qFuzzyIsNull(state()->matrix.m11())
+ && qFuzzyIsNull(state()->matrix.m22())))
+ {
+ state()->rectangleClip = state()->rectangleClip.intersected(state()->matrix.mapRect(rect).toRect());
+ d->updateClipScissorTest();
+ return;
+ }
+ }
+#endif
+
+ const QRect pathRect = state()->matrix.mapRect(path.controlPointRect()).toAlignedRect();
+
+ switch (op) {
+ case Qt::NoClip:
+ if (d->useSystemClip) {
+ state()->clipTestEnabled = true;
+ state()->currentClip = 1;
+ } else {
+ state()->clipTestEnabled = false;
+ }
+ state()->rectangleClip = QRect(0, 0, d->width, d->height);
+ state()->canRestoreClip = false;
+ d->updateClipScissorTest();
+ break;
+ case Qt::IntersectClip:
+ state()->rectangleClip = state()->rectangleClip.intersected(pathRect);
+ d->updateClipScissorTest();
+ d->resetClipIfNeeded();
+ ++d->maxClip;
+ d->writeClip(path, d->maxClip);
+ state()->currentClip = d->maxClip;
+ state()->clipTestEnabled = true;
+ break;
+ case Qt::UniteClip: {
+ d->resetClipIfNeeded();
+ ++d->maxClip;
+ if (state()->rectangleClip.isValid()) {
+ QPainterPath path;
+ path.addRect(state()->rectangleClip);
+
+ // flush the existing clip rectangle to the depth buffer
+ d->writeClip(qtVectorPathForPath(state()->matrix.inverted().map(path)), d->maxClip);
+ }
+
+ state()->clipTestEnabled = false;
+#ifndef QT_GL_NO_SCISSOR_TEST
+ QRect oldRectangleClip = state()->rectangleClip;
+
+ state()->rectangleClip = state()->rectangleClip.united(pathRect);
+ d->updateClipScissorTest();
+
+ QRegion extendRegion = QRegion(state()->rectangleClip) - oldRectangleClip;
+
+ if (!extendRegion.isEmpty()) {
+ QPainterPath extendPath;
+ extendPath.addRegion(extendRegion);
+
+ // first clear the depth buffer in the extended region
+ d->writeClip(qtVectorPathForPath(state()->matrix.inverted().map(extendPath)), 0);
+ }
+#endif
+ // now write the clip path
+ d->writeClip(path, d->maxClip);
+ state()->canRestoreClip = false;
+ state()->currentClip = d->maxClip;
+ state()->clipTestEnabled = true;
+ break;
+ }
+ default:
+ break;
+ }
+}
+
+void QGL2PaintEngineExPrivate::regenerateClip()
+{
+ systemStateChanged();
+ replayClipOperations();
+}
+
+void QGL2PaintEngineExPrivate::systemStateChanged()
+{
+ Q_Q(QGL2PaintEngineEx);
+
+ q->state()->clipChanged = true;
+
+ if (systemClip.isEmpty()) {
+ useSystemClip = false;
+ } else {
+ if (q->paintDevice()->devType() == QInternal::Widget && currentClipWidget) {
+ QWidgetPrivate *widgetPrivate = qt_widget_private(currentClipWidget->window());
+ useSystemClip = widgetPrivate->extra && widgetPrivate->extra->inRenderWithPainter;
+ } else {
+ useSystemClip = true;
+ }
+ }
+
+ q->state()->clipTestEnabled = false;
+ q->state()->needsClipBufferClear = true;
+
+ q->state()->currentClip = 1;
+ maxClip = 1;
+
+ q->state()->rectangleClip = useSystemClip ? systemClip.boundingRect() : QRect(0, 0, width, height);
+ updateClipScissorTest();
+
+ if (systemClip.rectCount() == 1) {
+ if (systemClip.boundingRect() == QRect(0, 0, width, height))
+ useSystemClip = false;
+#ifndef QT_GL_NO_SCISSOR_TEST
+ // scissoring takes care of the system clip
+ return;
+#endif
+ }
+
+ if (useSystemClip) {
+ clearClip(0);
+
+ QPainterPath path;
+ path.addRegion(systemClip);
+
+ q->state()->currentClip = 0;
+ writeClip(qtVectorPathForPath(q->state()->matrix.inverted().map(path)), 1);
+ q->state()->currentClip = 1;
+ q->state()->clipTestEnabled = true;
+ }
+}
+
+void QGL2PaintEngineEx::setState(QPainterState *new_state)
+{
+ // qDebug("QGL2PaintEngineEx::setState()");
+
+ Q_D(QGL2PaintEngineEx);
+
+ QOpenGL2PaintEngineState *s = static_cast<QOpenGL2PaintEngineState *>(new_state);
+ QOpenGL2PaintEngineState *old_state = state();
+
+ QPaintEngineEx::setState(s);
+
+ if (s->isNew) {
+ // Newly created state object. The call to setState()
+ // will either be followed by a call to begin(), or we are
+ // setting the state as part of a save().
+ s->isNew = false;
+ return;
+ }
+
+ // Setting the state as part of a restore().
+
+ if (old_state == s || old_state->renderHintsChanged)
+ renderHintsChanged();
+
+ if (old_state == s || old_state->matrixChanged)
+ d->matrixDirty = true;
+
+ if (old_state == s || old_state->compositionModeChanged)
+ d->compositionModeDirty = true;
+
+ if (old_state == s || old_state->opacityChanged)
+ d->opacityUniformDirty = true;
+
+ if (old_state == s || old_state->clipChanged) {
+ if (old_state && old_state != s && old_state->canRestoreClip) {
+ d->updateClipScissorTest();
+ glDepthFunc(GL_LEQUAL);
+ } else {
+ d->regenerateClip();
+ }
+ }
+}
+
+QPainterState *QGL2PaintEngineEx::createState(QPainterState *orig) const
+{
+ if (orig)
+ const_cast<QGL2PaintEngineEx *>(this)->ensureActive();
+
+ QOpenGL2PaintEngineState *s;
+ if (!orig)
+ s = new QOpenGL2PaintEngineState();
+ else
+ s = new QOpenGL2PaintEngineState(*static_cast<QOpenGL2PaintEngineState *>(orig));
+
+ s->matrixChanged = false;
+ s->compositionModeChanged = false;
+ s->opacityChanged = false;
+ s->renderHintsChanged = false;
+ s->clipChanged = false;
+
+ return s;
+}
+
+QOpenGL2PaintEngineState::QOpenGL2PaintEngineState(QOpenGL2PaintEngineState &other)
+ : QPainterState(other)
+{
+ isNew = true;
+ needsClipBufferClear = other.needsClipBufferClear;
+ clipTestEnabled = other.clipTestEnabled;
+ currentClip = other.currentClip;
+ canRestoreClip = other.canRestoreClip;
+ rectangleClip = other.rectangleClip;
+}
+
+QOpenGL2PaintEngineState::QOpenGL2PaintEngineState()
+{
+ isNew = true;
+ needsClipBufferClear = true;
+ clipTestEnabled = false;
+ canRestoreClip = true;
+}
+
+QOpenGL2PaintEngineState::~QOpenGL2PaintEngineState()
+{
+}
+
+QT_END_NAMESPACE
diff --git a/src/opengl/gl2paintengineex/qpaintengineex_opengl2_p.h b/src/opengl/gl2paintengineex/qpaintengineex_opengl2_p.h
new file mode 100644
index 0000000000..f7ec5f5c2f
--- /dev/null
+++ b/src/opengl/gl2paintengineex/qpaintengineex_opengl2_p.h
@@ -0,0 +1,332 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtOpenGL module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QGRAPHICSCONTEXT_OPENGL2_P_H
+#define QGRAPHICSCONTEXT_OPENGL2_P_H
+
+//
+// W A R N I N G
+// -------------
+//
+// This file is not part of the Qt API. It exists purely as an
+// implementation detail. This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QDebug>
+
+#include <private/qpaintengineex_p.h>
+#include <private/qglengineshadermanager_p.h>
+#include <private/qgl2pexvertexarray_p.h>
+#include <private/qglpaintdevice_p.h>
+#include <private/qglpixmapfilter_p.h>
+#include <private/qfontengine_p.h>
+#include <private/qdatabuffer_p.h>
+#include <private/qtriangulatingstroker_p.h>
+
+enum EngineMode {
+ ImageDrawingMode,
+ TextDrawingMode,
+ BrushDrawingMode,
+ ImageArrayDrawingMode
+};
+
+QT_BEGIN_NAMESPACE
+
+#define GL_STENCIL_HIGH_BIT GLuint(0x80)
+#define QT_BRUSH_TEXTURE_UNIT GLuint(0)
+#define QT_IMAGE_TEXTURE_UNIT GLuint(0) //Can be the same as brush texture unit
+#define QT_MASK_TEXTURE_UNIT GLuint(1)
+#define QT_BACKGROUND_TEXTURE_UNIT GLuint(2)
+
+class QGL2PaintEngineExPrivate;
+
+
+class QOpenGL2PaintEngineState : public QPainterState
+{
+public:
+ QOpenGL2PaintEngineState(QOpenGL2PaintEngineState &other);
+ QOpenGL2PaintEngineState();
+ ~QOpenGL2PaintEngineState();
+
+ uint isNew : 1;
+ uint needsClipBufferClear : 1;
+ uint clipTestEnabled : 1;
+ uint canRestoreClip : 1;
+ uint matrixChanged : 1;
+ uint compositionModeChanged : 1;
+ uint opacityChanged : 1;
+ uint renderHintsChanged : 1;
+ uint clipChanged : 1;
+ uint currentClip : 8;
+
+ QRect rectangleClip;
+};
+
+class Q_OPENGL_EXPORT QGL2PaintEngineEx : public QPaintEngineEx
+{
+ Q_DECLARE_PRIVATE(QGL2PaintEngineEx)
+public:
+ QGL2PaintEngineEx();
+ ~QGL2PaintEngineEx();
+
+ bool begin(QPaintDevice *device);
+ void ensureActive();
+ bool end();
+
+ virtual void clipEnabledChanged();
+ virtual void penChanged();
+ virtual void brushChanged();
+ virtual void brushOriginChanged();
+ virtual void opacityChanged();
+ virtual void compositionModeChanged();
+ virtual void renderHintsChanged();
+ virtual void transformChanged();
+
+ virtual void drawPixmap(const QRectF &r, const QPixmap &pm, const QRectF &sr);
+ virtual void drawPixmapFragments(const QPainter::PixmapFragment *fragments, int fragmentCount, const QPixmap &pixmap,
+ QPainter::PixmapFragmentHints hints);
+ virtual void drawImage(const QRectF &r, const QImage &pm, const QRectF &sr,
+ Qt::ImageConversionFlags flags = Qt::AutoColor);
+ virtual void drawTextItem(const QPointF &p, const QTextItem &textItem);
+ virtual void fill(const QVectorPath &path, const QBrush &brush);
+ virtual void stroke(const QVectorPath &path, const QPen &pen);
+ virtual void clip(const QVectorPath &path, Qt::ClipOperation op);
+
+ virtual void drawStaticTextItem(QStaticTextItem *textItem);
+
+ bool drawTexture(const QRectF &r, GLuint textureId, const QSize &size, const QRectF &sr);
+
+ Type type() const { return OpenGL2; }
+
+ virtual void setState(QPainterState *s);
+ virtual QPainterState *createState(QPainterState *orig) const;
+ inline QOpenGL2PaintEngineState *state() {
+ return static_cast<QOpenGL2PaintEngineState *>(QPaintEngineEx::state());
+ }
+ inline const QOpenGL2PaintEngineState *state() const {
+ return static_cast<const QOpenGL2PaintEngineState *>(QPaintEngineEx::state());
+ }
+
+ void beginNativePainting();
+ void endNativePainting();
+
+ void invalidateState();
+
+ QPixmapFilter *pixmapFilter(int type, const QPixmapFilter *prototype);
+
+ void setRenderTextActive(bool);
+
+ bool isNativePaintingActive() const;
+private:
+ Q_DISABLE_COPY(QGL2PaintEngineEx)
+};
+
+class QGL2PaintEngineExPrivate : public QPaintEngineExPrivate
+{
+ Q_DECLARE_PUBLIC(QGL2PaintEngineEx)
+public:
+ enum StencilFillMode {
+ OddEvenFillMode,
+ WindingFillMode,
+ TriStripStrokeFillMode
+ };
+
+ QGL2PaintEngineExPrivate(QGL2PaintEngineEx *q_ptr) :
+ q(q_ptr),
+ shaderManager(0),
+ width(0), height(0),
+ ctx(0),
+ useSystemClip(true),
+ elementIndicesVBOId(0),
+ opacityArray(0),
+ snapToPixelGrid(false),
+ nativePaintingActive(false),
+ inverseScale(1),
+ lastMaskTextureUsed(0)
+ { }
+
+ ~QGL2PaintEngineExPrivate();
+
+ void updateBrushTexture();
+ void updateBrushUniforms();
+ void updateMatrix();
+ void updateCompositionMode();
+ void updateTextureFilter(GLenum target, GLenum wrapMode, bool smoothPixmapTransform, GLuint id = -1);
+
+ void resetGLState();
+
+ // fill, stroke, drawTexture, drawPixmaps & drawCachedGlyphs are the main rendering entry-points,
+ // however writeClip can also be thought of as en entry point as it does similar things.
+ void fill(const QVectorPath &path);
+ void stroke(const QVectorPath &path, const QPen &pen);
+ void drawTexture(const QGLRect& dest, const QGLRect& src, const QSize &textureSize, bool opaque, bool pattern = false);
+ void drawPixmapFragments(const QPainter::PixmapFragment *fragments, int fragmentCount, const QPixmap &pixmap,
+ QPainter::PixmapFragmentHints hints);
+ void drawCachedGlyphs(QFontEngineGlyphCache::Type glyphType, QStaticTextItem *staticTextItem);
+
+ // Calls glVertexAttributePointer if the pointer has changed
+ inline void setVertexAttributePointer(unsigned int arrayIndex, const GLfloat *pointer);
+
+ // draws whatever is in the vertex array:
+ void drawVertexArrays(const float *data, int *stops, int stopCount, GLenum primitive);
+ void drawVertexArrays(QGL2PEXVertexArray &vertexArray, GLenum primitive) {
+ drawVertexArrays((const float *) vertexArray.data(), vertexArray.stops(), vertexArray.stopCount(), primitive);
+ }
+
+ // Composites the bounding rect onto dest buffer:
+ void composite(const QGLRect& boundingRect);
+
+ // Calls drawVertexArrays to render into stencil buffer:
+ void fillStencilWithVertexArray(const float *data, int count, int *stops, int stopCount, const QGLRect &bounds, StencilFillMode mode);
+ void fillStencilWithVertexArray(QGL2PEXVertexArray& vertexArray, bool useWindingFill) {
+ fillStencilWithVertexArray((const float *) vertexArray.data(), 0, vertexArray.stops(), vertexArray.stopCount(),
+ vertexArray.boundingRect(),
+ useWindingFill ? WindingFillMode : OddEvenFillMode);
+ }
+
+ void setBrush(const QBrush& brush);
+ void transferMode(EngineMode newMode);
+ bool prepareForDraw(bool srcPixelsAreOpaque); // returns true if the program has changed
+ inline void useSimpleShader();
+ inline GLuint location(const QGLEngineShaderManager::Uniform uniform) {
+ return shaderManager->getUniformLocation(uniform);
+ }
+
+ void clearClip(uint value);
+ void writeClip(const QVectorPath &path, uint value);
+ void resetClipIfNeeded();
+
+ void updateClipScissorTest();
+ void setScissor(const QRect &rect);
+ void regenerateClip();
+ void systemStateChanged();
+
+
+ static QGLEngineShaderManager* shaderManagerForEngine(QGL2PaintEngineEx *engine) { return engine->d_func()->shaderManager; }
+ static QGL2PaintEngineExPrivate *getData(QGL2PaintEngineEx *engine) { return engine->d_func(); }
+ static void cleanupVectorPath(QPaintEngineEx *engine, void *data);
+
+
+ QGL2PaintEngineEx* q;
+ QGLEngineShaderManager* shaderManager;
+ QGLPaintDevice* device;
+ int width, height;
+ QGLContext *ctx;
+ EngineMode mode;
+ QFontEngineGlyphCache::Type glyphCacheType;
+
+ // Dirty flags
+ bool matrixDirty; // Implies matrix uniforms are also dirty
+ bool compositionModeDirty;
+ bool brushTextureDirty;
+ bool brushUniformsDirty;
+ bool opacityUniformDirty;
+ bool matrixUniformDirty;
+
+ bool stencilClean; // Has the stencil not been used for clipping so far?
+ bool useSystemClip;
+ QRegion dirtyStencilRegion;
+ QRect currentScissorBounds;
+ uint maxClip;
+
+ QBrush currentBrush; // May not be the state's brush!
+ const QBrush noBrush;
+
+ QPixmap currentBrushPixmap;
+
+ QGL2PEXVertexArray vertexCoordinateArray;
+ QGL2PEXVertexArray textureCoordinateArray;
+ QVector<GLushort> elementIndices;
+ GLuint elementIndicesVBOId;
+ QDataBuffer<GLfloat> opacityArray;
+ GLfloat staticVertexCoordinateArray[8];
+ GLfloat staticTextureCoordinateArray[8];
+
+ bool snapToPixelGrid;
+ bool nativePaintingActive;
+ GLfloat pmvMatrix[3][3];
+ GLfloat inverseScale;
+
+ GLuint lastTextureUsed;
+ GLuint lastMaskTextureUsed;
+
+ bool needsSync;
+ bool multisamplingAlwaysEnabled;
+
+ GLfloat depthRange[2];
+
+ float textureInvertedY;
+
+ QTriangulatingStroker stroker;
+ QDashedStrokeProcessor dasher;
+
+ QScopedPointer<QPixmapFilter> convolutionFilter;
+ QScopedPointer<QPixmapFilter> colorizeFilter;
+ QScopedPointer<QPixmapFilter> blurFilter;
+ QScopedPointer<QPixmapFilter> dropShadowFilter;
+
+ QSet<QVectorPath::CacheEntry *> pathCaches;
+ QVector<GLuint> unusedVBOSToClean;
+ QVector<GLuint> unusedIBOSToClean;
+
+ const GLfloat *vertexAttribPointers[3];
+};
+
+
+void QGL2PaintEngineExPrivate::setVertexAttributePointer(unsigned int arrayIndex, const GLfloat *pointer)
+{
+ Q_ASSERT(arrayIndex < 3);
+ if (pointer == vertexAttribPointers[arrayIndex])
+ return;
+
+ vertexAttribPointers[arrayIndex] = pointer;
+ if (arrayIndex == QT_OPACITY_ATTR)
+ glVertexAttribPointer(arrayIndex, 1, GL_FLOAT, GL_FALSE, 0, pointer);
+ else
+ glVertexAttribPointer(arrayIndex, 2, GL_FLOAT, GL_FALSE, 0, pointer);
+}
+
+QT_END_NAMESPACE
+
+#endif
diff --git a/src/opengl/gl2paintengineex/qtextureglyphcache_gl.cpp b/src/opengl/gl2paintengineex/qtextureglyphcache_gl.cpp
new file mode 100644
index 0000000000..c867d60a72
--- /dev/null
+++ b/src/opengl/gl2paintengineex/qtextureglyphcache_gl.cpp
@@ -0,0 +1,396 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtOpenGL module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qtextureglyphcache_gl_p.h"
+#include "qpaintengineex_opengl2_p.h"
+#include "private/qglengineshadersource_p.h"
+
+#if defined QT_OPENGL_ES_2 && !defined(QT_NO_EGL)
+#include "private/qeglcontext_p.h"
+#endif
+
+QT_BEGIN_NAMESPACE
+
+#ifdef Q_WS_WIN
+extern Q_GUI_EXPORT bool qt_cleartype_enabled;
+#endif
+
+QBasicAtomicInt qgltextureglyphcache_serial_number = Q_BASIC_ATOMIC_INITIALIZER(1);
+
+QGLTextureGlyphCache::QGLTextureGlyphCache(const QGLContext *context, QFontEngineGlyphCache::Type type, const QTransform &matrix)
+ : QImageTextureGlyphCache(type, matrix), QGLContextGroupResourceBase()
+ , ctx(0)
+ , pex(0)
+ , m_blitProgram(0)
+ , m_filterMode(Nearest)
+ , m_serialNumber(qgltextureglyphcache_serial_number.fetchAndAddRelaxed(1))
+{
+#ifdef QT_GL_TEXTURE_GLYPH_CACHE_DEBUG
+ qDebug(" -> QGLTextureGlyphCache() %p for context %p.", this, ctx);
+#endif
+ setContext(context);
+
+ m_vertexCoordinateArray[0] = -1.0f;
+ m_vertexCoordinateArray[1] = -1.0f;
+ m_vertexCoordinateArray[2] = 1.0f;
+ m_vertexCoordinateArray[3] = -1.0f;
+ m_vertexCoordinateArray[4] = 1.0f;
+ m_vertexCoordinateArray[5] = 1.0f;
+ m_vertexCoordinateArray[6] = -1.0f;
+ m_vertexCoordinateArray[7] = 1.0f;
+
+ m_textureCoordinateArray[0] = 0.0f;
+ m_textureCoordinateArray[1] = 0.0f;
+ m_textureCoordinateArray[2] = 1.0f;
+ m_textureCoordinateArray[3] = 0.0f;
+ m_textureCoordinateArray[4] = 1.0f;
+ m_textureCoordinateArray[5] = 1.0f;
+ m_textureCoordinateArray[6] = 0.0f;
+ m_textureCoordinateArray[7] = 1.0f;
+}
+
+QGLTextureGlyphCache::~QGLTextureGlyphCache()
+{
+#ifdef QT_GL_TEXTURE_GLYPH_CACHE_DEBUG
+ qDebug(" -> ~QGLTextureGlyphCache() %p.", this);
+#endif
+ delete m_blitProgram;
+}
+
+void QGLTextureGlyphCache::setContext(const QGLContext *context)
+{
+ ctx = context;
+ m_h = 0;
+}
+
+void QGLTextureGlyphCache::createTextureData(int width, int height)
+{
+ if (ctx == 0) {
+ qWarning("QGLTextureGlyphCache::createTextureData: Called with no context");
+ return;
+ }
+
+ // create in QImageTextureGlyphCache baseclass is meant to be called
+ // only to create the initial image and does not preserve the content,
+ // so we don't call when this function is called from resize.
+ if (ctx->d_ptr->workaround_brokenFBOReadBack && image().isNull())
+ QImageTextureGlyphCache::createTextureData(width, height);
+
+ // Make the lower glyph texture size 16 x 16.
+ if (width < 16)
+ width = 16;
+ if (height < 16)
+ height = 16;
+
+ QGLGlyphTexture *glyphTexture = m_textureResource.value(ctx);
+ glGenTextures(1, &glyphTexture->m_texture);
+ glBindTexture(GL_TEXTURE_2D, glyphTexture->m_texture);
+
+ glyphTexture->m_width = width;
+ glyphTexture->m_height = height;
+
+ if (m_type == QFontEngineGlyphCache::Raster_RGBMask) {
+ QVarLengthArray<uchar> data(width * height * 4);
+ for (int i = 0; i < data.size(); ++i)
+ data[i] = 0;
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, &data[0]);
+ } else {
+ QVarLengthArray<uchar> data(width * height);
+ for (int i = 0; i < data.size(); ++i)
+ data[i] = 0;
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, width, height, 0, GL_ALPHA, GL_UNSIGNED_BYTE, &data[0]);
+ }
+
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+ m_filterMode = Nearest;
+}
+
+void QGLTextureGlyphCache::resizeTextureData(int width, int height)
+{
+ if (ctx == 0) {
+ qWarning("QGLTextureGlyphCache::resizeTextureData: Called with no context");
+ return;
+ }
+ QGLGlyphTexture *glyphTexture = m_textureResource.value(ctx);
+
+ int oldWidth = glyphTexture->m_width;
+ int oldHeight = glyphTexture->m_height;
+
+ // Make the lower glyph texture size 16 x 16.
+ if (width < 16)
+ width = 16;
+ if (height < 16)
+ height = 16;
+
+ GLuint oldTexture = glyphTexture->m_texture;
+ createTextureData(width, height);
+
+ if (ctx->d_ptr->workaround_brokenFBOReadBack) {
+ QImageTextureGlyphCache::resizeTextureData(width, height);
+ Q_ASSERT(image().depth() == 8);
+ glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, oldHeight, GL_ALPHA, GL_UNSIGNED_BYTE, image().constBits());
+ glDeleteTextures(1, &oldTexture);
+ return;
+ }
+
+ // ### the QTextureGlyphCache API needs to be reworked to allow
+ // ### resizeTextureData to fail
+
+ glBindFramebuffer(GL_FRAMEBUFFER_EXT, glyphTexture->m_fbo);
+
+ GLuint tmp_texture;
+ glGenTextures(1, &tmp_texture);
+ glBindTexture(GL_TEXTURE_2D, tmp_texture);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, oldWidth, oldHeight, 0,
+ GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+ m_filterMode = Nearest;
+ glBindTexture(GL_TEXTURE_2D, 0);
+ glFramebufferTexture2D(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
+ GL_TEXTURE_2D, tmp_texture, 0);
+
+ glActiveTexture(GL_TEXTURE0 + QT_IMAGE_TEXTURE_UNIT);
+ glBindTexture(GL_TEXTURE_2D, oldTexture);
+
+ if (pex != 0)
+ pex->transferMode(BrushDrawingMode);
+
+ glDisable(GL_STENCIL_TEST);
+ glDisable(GL_DEPTH_TEST);
+ glDisable(GL_SCISSOR_TEST);
+ glDisable(GL_BLEND);
+
+ glViewport(0, 0, oldWidth, oldHeight);
+
+ QGLShaderProgram *blitProgram = 0;
+ if (pex == 0) {
+ if (m_blitProgram == 0) {
+ m_blitProgram = new QGLShaderProgram(ctx);
+
+ {
+ QString source;
+ source.append(QLatin1String(qglslMainWithTexCoordsVertexShader));
+ source.append(QLatin1String(qglslUntransformedPositionVertexShader));
+
+ QGLShader *vertexShader = new QGLShader(QGLShader::Vertex, m_blitProgram);
+ vertexShader->compileSourceCode(source);
+
+ m_blitProgram->addShader(vertexShader);
+ }
+
+ {
+ QString source;
+ source.append(QLatin1String(qglslMainFragmentShader));
+ source.append(QLatin1String(qglslImageSrcFragmentShader));
+
+ QGLShader *fragmentShader = new QGLShader(QGLShader::Fragment, m_blitProgram);
+ fragmentShader->compileSourceCode(source);
+
+ m_blitProgram->addShader(fragmentShader);
+ }
+
+ m_blitProgram->bindAttributeLocation("vertexCoordsArray", QT_VERTEX_COORDS_ATTR);
+ m_blitProgram->bindAttributeLocation("textureCoordArray", QT_TEXTURE_COORDS_ATTR);
+
+ m_blitProgram->link();
+ }
+
+ glVertexAttribPointer(QT_VERTEX_COORDS_ATTR, 2, GL_FLOAT, GL_FALSE, 0, m_vertexCoordinateArray);
+ glVertexAttribPointer(QT_TEXTURE_COORDS_ATTR, 2, GL_FLOAT, GL_FALSE, 0, m_textureCoordinateArray);
+
+ m_blitProgram->bind();
+ m_blitProgram->enableAttributeArray(int(QT_VERTEX_COORDS_ATTR));
+ m_blitProgram->enableAttributeArray(int(QT_TEXTURE_COORDS_ATTR));
+ m_blitProgram->disableAttributeArray(int(QT_OPACITY_ATTR));
+
+ blitProgram = m_blitProgram;
+
+ } else {
+ pex->setVertexAttributePointer(QT_VERTEX_COORDS_ATTR, m_vertexCoordinateArray);
+ pex->setVertexAttributePointer(QT_TEXTURE_COORDS_ATTR, m_textureCoordinateArray);
+
+ pex->shaderManager->useBlitProgram();
+ blitProgram = pex->shaderManager->blitProgram();
+ }
+
+ blitProgram->setUniformValue("imageTexture", QT_IMAGE_TEXTURE_UNIT);
+
+ glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
+
+ glBindTexture(GL_TEXTURE_2D, glyphTexture->m_texture);
+
+ glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, oldWidth, oldHeight);
+
+ glFramebufferRenderbuffer(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
+ GL_RENDERBUFFER_EXT, 0);
+ glDeleteTextures(1, &tmp_texture);
+ glDeleteTextures(1, &oldTexture);
+
+ glBindFramebuffer(GL_FRAMEBUFFER_EXT, ctx->d_ptr->current_fbo);
+
+ if (pex != 0) {
+ glViewport(0, 0, pex->width, pex->height);
+ pex->updateClipScissorTest();
+ }
+}
+
+void QGLTextureGlyphCache::fillTexture(const Coord &c, glyph_t glyph, QFixed subPixelPosition)
+{
+ if (ctx == 0) {
+ qWarning("QGLTextureGlyphCache::fillTexture: Called with no context");
+ return;
+ }
+
+ QGLGlyphTexture *glyphTexture = m_textureResource.value(ctx);
+ if (ctx->d_ptr->workaround_brokenFBOReadBack) {
+ QImageTextureGlyphCache::fillTexture(c, glyph, subPixelPosition);
+
+ glBindTexture(GL_TEXTURE_2D, glyphTexture->m_texture);
+ const QImage &texture = image();
+ const uchar *bits = texture.constBits();
+ bits += c.y * texture.bytesPerLine() + c.x;
+ for (int i=0; i<c.h; ++i) {
+ glTexSubImage2D(GL_TEXTURE_2D, 0, c.x, c.y + i, c.w, 1, GL_ALPHA, GL_UNSIGNED_BYTE, bits);
+ bits += texture.bytesPerLine();
+ }
+ return;
+ }
+
+ QImage mask = textureMapForGlyph(glyph, subPixelPosition);
+ const int maskWidth = mask.width();
+ const int maskHeight = mask.height();
+
+ if (mask.format() == QImage::Format_Mono) {
+ mask = mask.convertToFormat(QImage::Format_Indexed8);
+ for (int y = 0; y < maskHeight; ++y) {
+ uchar *src = (uchar *) mask.scanLine(y);
+ for (int x = 0; x < maskWidth; ++x)
+ src[x] = -src[x]; // convert 0 and 1 into 0 and 255
+ }
+ } else if (mask.format() == QImage::Format_RGB32) {
+ // Make the alpha component equal to the average of the RGB values.
+ // This is needed when drawing sub-pixel antialiased text on translucent targets.
+ for (int y = 0; y < maskHeight; ++y) {
+ quint32 *src = (quint32 *) mask.scanLine(y);
+ for (int x = 0; x < maskWidth; ++x) {
+ uchar r = src[x] >> 16;
+ uchar g = src[x] >> 8;
+ uchar b = src[x];
+ quint32 avg = (quint32(r) + quint32(g) + quint32(b) + 1) / 3; // "+1" for rounding.
+ src[x] = (src[x] & 0x00ffffff) | (avg << 24);
+ }
+ }
+ }
+
+ glBindTexture(GL_TEXTURE_2D, glyphTexture->m_texture);
+ if (mask.format() == QImage::Format_RGB32) {
+ glTexSubImage2D(GL_TEXTURE_2D, 0, c.x, c.y, maskWidth, maskHeight, GL_BGRA, GL_UNSIGNED_BYTE, mask.bits());
+ } else {
+ // glTexSubImage2D() might cause some garbage to appear in the texture if the mask width is
+ // not a multiple of four bytes. The bug appeared on a computer with 32-bit Windows Vista
+ // and nVidia GeForce 8500GT. GL_UNPACK_ALIGNMENT is set to four bytes, 'mask' has a
+ // multiple of four bytes per line, and most of the glyph shows up correctly in the
+ // texture, which makes me think that this is a driver bug.
+ // One workaround is to make sure the mask width is a multiple of four bytes, for instance
+ // by converting it to a format with four bytes per pixel. Another is to copy one line at a
+ // time.
+
+ if (!ctx->d_ptr->workaround_brokenAlphaTexSubImage_init) {
+ // don't know which driver versions exhibit this bug, so be conservative for now
+ const QByteArray versionString(reinterpret_cast<const char*>(glGetString(GL_VERSION)));
+ ctx->d_ptr->workaround_brokenAlphaTexSubImage = versionString.indexOf("NVIDIA") >= 0;
+ ctx->d_ptr->workaround_brokenAlphaTexSubImage_init = true;
+ }
+
+ if (ctx->d_ptr->workaround_brokenAlphaTexSubImage) {
+ for (int i = 0; i < maskHeight; ++i)
+ glTexSubImage2D(GL_TEXTURE_2D, 0, c.x, c.y + i, maskWidth, 1, GL_ALPHA, GL_UNSIGNED_BYTE, mask.scanLine(i));
+ } else {
+ glTexSubImage2D(GL_TEXTURE_2D, 0, c.x, c.y, maskWidth, maskHeight, GL_ALPHA, GL_UNSIGNED_BYTE, mask.bits());
+ }
+ }
+}
+
+int QGLTextureGlyphCache::glyphPadding() const
+{
+ return 1;
+}
+
+int QGLTextureGlyphCache::maxTextureWidth() const
+{
+ if (ctx == 0)
+ return QImageTextureGlyphCache::maxTextureWidth();
+ else
+ return ctx->d_ptr->maxTextureSize();
+}
+
+int QGLTextureGlyphCache::maxTextureHeight() const
+{
+ if (ctx == 0)
+ return QImageTextureGlyphCache::maxTextureHeight();
+
+ if (ctx->d_ptr->workaround_brokenTexSubImage)
+ return qMin(1024, ctx->d_ptr->maxTextureSize());
+ else
+ return ctx->d_ptr->maxTextureSize();
+}
+
+void QGLTextureGlyphCache::clear()
+{
+ if (ctx != 0) {
+ m_textureResource.cleanup(ctx);
+
+ m_w = 0;
+ m_h = 0;
+ m_cx = 0;
+ m_cy = 0;
+ m_currentRowHeight = 0;
+ coords.clear();
+ }
+}
+
+QT_END_NAMESPACE
diff --git a/src/opengl/gl2paintengineex/qtextureglyphcache_gl_p.h b/src/opengl/gl2paintengineex/qtextureglyphcache_gl_p.h
new file mode 100644
index 0000000000..133289e81c
--- /dev/null
+++ b/src/opengl/gl2paintengineex/qtextureglyphcache_gl_p.h
@@ -0,0 +1,166 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtOpenGL module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QTEXTUREGLYPHCACHE_GL_P_H
+#define QTEXTUREGLYPHCACHE_GL_P_H
+
+//
+// W A R N I N G
+// -------------
+//
+// This file is not part of the Qt API. It exists for the convenience
+// of the QLibrary class. This header file may change from
+// version to version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <private/qtextureglyphcache_p.h>
+#include <private/qgl_p.h>
+#include <qglshaderprogram.h>
+
+// #define QT_GL_TEXTURE_GLYPH_CACHE_DEBUG
+
+QT_BEGIN_NAMESPACE
+
+class QGL2PaintEngineExPrivate;
+
+struct QGLGlyphTexture
+{
+ QGLGlyphTexture(const QGLContext *ctx)
+ : m_width(0)
+ , m_height(0)
+ {
+ if (ctx && !ctx->d_ptr->workaround_brokenFBOReadBack)
+ glGenFramebuffers(1, &m_fbo);
+
+#ifdef QT_GL_TEXTURE_GLYPH_CACHE_DEBUG
+ qDebug(" -> QGLGlyphTexture() %p for context %p.", this, ctx);
+#endif
+ }
+
+ ~QGLGlyphTexture() {
+ const QGLContext *ctx = QGLContext::currentContext();
+#ifdef QT_GL_TEXTURE_GLYPH_CACHE_DEBUG
+ qDebug("~QGLGlyphTexture() %p for context %p.", this, ctx);
+#endif
+ // At this point, the context group is made current, so it's safe to
+ // release resources without a makeCurrent() call
+ if (ctx) {
+ if (!ctx->d_ptr->workaround_brokenFBOReadBack)
+ glDeleteFramebuffers(1, &m_fbo);
+ if (m_width || m_height)
+ glDeleteTextures(1, &m_texture);
+ }
+ }
+
+ GLuint m_texture;
+ GLuint m_fbo;
+ int m_width;
+ int m_height;
+};
+
+class Q_OPENGL_EXPORT QGLTextureGlyphCache : public QImageTextureGlyphCache, public QGLContextGroupResourceBase
+{
+public:
+ QGLTextureGlyphCache(const QGLContext *context, QFontEngineGlyphCache::Type type, const QTransform &matrix);
+ ~QGLTextureGlyphCache();
+
+ virtual void createTextureData(int width, int height);
+ virtual void resizeTextureData(int width, int height);
+ virtual void fillTexture(const Coord &c, glyph_t glyph, QFixed subPixelPosition);
+ virtual int glyphPadding() const;
+ virtual int maxTextureWidth() const;
+ virtual int maxTextureHeight() const;
+
+ inline GLuint texture() const {
+ QGLTextureGlyphCache *that = const_cast<QGLTextureGlyphCache *>(this);
+ QGLGlyphTexture *glyphTexture = that->m_textureResource.value(ctx);
+ return glyphTexture ? glyphTexture->m_texture : 0;
+ }
+
+ inline int width() const {
+ QGLTextureGlyphCache *that = const_cast<QGLTextureGlyphCache *>(this);
+ QGLGlyphTexture *glyphTexture = that->m_textureResource.value(ctx);
+ return glyphTexture ? glyphTexture->m_width : 0;
+ }
+ inline int height() const {
+ QGLTextureGlyphCache *that = const_cast<QGLTextureGlyphCache *>(this);
+ QGLGlyphTexture *glyphTexture = that->m_textureResource.value(ctx);
+ return glyphTexture ? glyphTexture->m_height : 0;
+ }
+
+ inline void setPaintEnginePrivate(QGL2PaintEngineExPrivate *p) { pex = p; }
+
+ void setContext(const QGLContext *context);
+ inline const QGLContext *context() const { return ctx; }
+
+ inline int serialNumber() const { return m_serialNumber; }
+
+ enum FilterMode {
+ Nearest,
+ Linear
+ };
+ FilterMode filterMode() const { return m_filterMode; }
+ void setFilterMode(FilterMode m) { m_filterMode = m; }
+
+ void clear();
+
+ void freeResource(void *) { ctx = 0; }
+
+private:
+ QGLContextGroupResource<QGLGlyphTexture> m_textureResource;
+
+ const QGLContext *ctx;
+ QGL2PaintEngineExPrivate *pex;
+ QGLShaderProgram *m_blitProgram;
+ FilterMode m_filterMode;
+
+ GLfloat m_vertexCoordinateArray[8];
+ GLfloat m_textureCoordinateArray[8];
+
+ int m_serialNumber;
+};
+
+QT_END_NAMESPACE
+
+#endif
+
diff --git a/src/opengl/gl2paintengineex/qtriangulatingstroker.cpp b/src/opengl/gl2paintengineex/qtriangulatingstroker.cpp
new file mode 100644
index 0000000000..f4e170d928
--- /dev/null
+++ b/src/opengl/gl2paintengineex/qtriangulatingstroker.cpp
@@ -0,0 +1,588 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtOpenGL module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qtriangulatingstroker_p.h"
+#include <qmath.h>
+
+QT_BEGIN_NAMESPACE
+
+#define CURVE_FLATNESS Q_PI / 8
+
+
+
+
+void QTriangulatingStroker::endCapOrJoinClosed(const qreal *start, const qreal *cur,
+ bool implicitClose, bool endsAtStart)
+{
+ if (endsAtStart) {
+ join(start + 2);
+ } else if (implicitClose) {
+ join(start);
+ lineTo(start);
+ join(start+2);
+ } else {
+ endCap(cur);
+ }
+ int count = m_vertices.size();
+
+ // Copy the (x, y) values because QDataBuffer::add(const float& t)
+ // may resize the buffer, which will leave t pointing at the
+ // previous buffer's memory region if we don't copy first.
+ float x = m_vertices.at(count-2);
+ float y = m_vertices.at(count-1);
+ m_vertices.add(x);
+ m_vertices.add(y);
+}
+
+
+void QTriangulatingStroker::process(const QVectorPath &path, const QPen &pen, const QRectF &)
+{
+ const qreal *pts = path.points();
+ const QPainterPath::ElementType *types = path.elements();
+ int count = path.elementCount();
+ if (count < 2)
+ return;
+
+ float realWidth = qpen_widthf(pen);
+ if (realWidth == 0)
+ realWidth = 1;
+
+ m_width = realWidth / 2;
+
+ bool cosmetic = pen.isCosmetic();
+ if (cosmetic) {
+ m_width = m_width * m_inv_scale;
+ }
+
+ m_join_style = qpen_joinStyle(pen);
+ m_cap_style = qpen_capStyle(pen);
+ m_vertices.reset();
+ m_miter_limit = pen.miterLimit() * qpen_widthf(pen);
+
+ // The curvyness is based on the notion that I originally wanted
+ // roughly one line segment pr 4 pixels. This may seem little, but
+ // because we sample at constantly incrementing B(t) E [0<t<1], we
+ // will get longer segments where the curvature is small and smaller
+ // segments when the curvature is high.
+ //
+ // To get a rough idea of the length of each curve, I pretend that
+ // the curve is a 90 degree arc, whose radius is
+ // qMax(curveBounds.width, curveBounds.height). Based on this
+ // logic we can estimate the length of the outline edges based on
+ // the radius + a pen width and adjusting for scale factors
+ // depending on if the pen is cosmetic or not.
+ //
+ // The curvyness value of PI/14 was based on,
+ // arcLength = 2*PI*r/4 = PI*r/2 and splitting length into somewhere
+ // between 3 and 8 where 5 seemed to be give pretty good results
+ // hence: Q_PI/14. Lower divisors will give more detail at the
+ // direct cost of performance.
+
+ // simplfy pens that are thin in device size (2px wide or less)
+ if (realWidth < 2.5 && (cosmetic || m_inv_scale == 1)) {
+ if (m_cap_style == Qt::RoundCap)
+ m_cap_style = Qt::SquareCap;
+ if (m_join_style == Qt::RoundJoin)
+ m_join_style = Qt::MiterJoin;
+ m_curvyness_add = 0.5;
+ m_curvyness_mul = CURVE_FLATNESS / m_inv_scale;
+ m_roundness = 1;
+ } else if (cosmetic) {
+ m_curvyness_add = realWidth / 2;
+ m_curvyness_mul = CURVE_FLATNESS;
+ m_roundness = qMax<int>(4, realWidth * CURVE_FLATNESS);
+ } else {
+ m_curvyness_add = m_width;
+ m_curvyness_mul = CURVE_FLATNESS / m_inv_scale;
+ m_roundness = qMax<int>(4, realWidth * m_curvyness_mul);
+ }
+
+ // Over this level of segmentation, there doesn't seem to be any
+ // benefit, even for huge penWidth
+ if (m_roundness > 24)
+ m_roundness = 24;
+
+ m_sin_theta = qFastSin(Q_PI / m_roundness);
+ m_cos_theta = qFastCos(Q_PI / m_roundness);
+
+ const qreal *endPts = pts + (count<<1);
+ const qreal *startPts = 0;
+
+ Qt::PenCapStyle cap = m_cap_style;
+
+ if (!types) {
+ // skip duplicate points
+ while((pts + 2) < endPts && pts[0] == pts[2] && pts[1] == pts[3])
+ pts += 2;
+ if ((pts + 2) == endPts)
+ return;
+
+ startPts = pts;
+
+ bool endsAtStart = startPts[0] == *(endPts-2) && startPts[1] == *(endPts-1);
+
+ if (endsAtStart || path.hasImplicitClose())
+ m_cap_style = Qt::FlatCap;
+ moveTo(pts);
+ m_cap_style = cap;
+ pts += 2;
+ lineTo(pts);
+ pts += 2;
+ while (pts < endPts) {
+ if (m_cx != pts[0] || m_cy != pts[1]) {
+ join(pts);
+ lineTo(pts);
+ }
+ pts += 2;
+ }
+
+ endCapOrJoinClosed(startPts, pts-2, path.hasImplicitClose(), endsAtStart);
+
+ } else {
+ bool endsAtStart = false;
+ while (pts < endPts) {
+ switch (*types) {
+ case QPainterPath::MoveToElement: {
+ if (pts != path.points())
+ endCapOrJoinClosed(startPts, pts-2, path.hasImplicitClose(), endsAtStart);
+
+ startPts = pts;
+ int end = (endPts - pts) / 2;
+ int i = 2; // Start looking to ahead since we never have two moveto's in a row
+ while (i<end && types[i] != QPainterPath::MoveToElement) {
+ ++i;
+ }
+ endsAtStart = startPts[0] == pts[i*2 - 2] && startPts[1] == pts[i*2 - 1];
+ if (endsAtStart || path.hasImplicitClose())
+ m_cap_style = Qt::FlatCap;
+
+ moveTo(pts);
+ m_cap_style = cap;
+ pts+=2;
+ ++types;
+ break; }
+ case QPainterPath::LineToElement:
+ if (*(types - 1) != QPainterPath::MoveToElement)
+ join(pts);
+ lineTo(pts);
+ pts+=2;
+ ++types;
+ break;
+ case QPainterPath::CurveToElement:
+ if (*(types - 1) != QPainterPath::MoveToElement)
+ join(pts);
+ cubicTo(pts);
+ pts+=6;
+ types+=3;
+ break;
+ default:
+ Q_ASSERT(false);
+ break;
+ }
+ }
+
+ endCapOrJoinClosed(startPts, pts-2, path.hasImplicitClose(), endsAtStart);
+ }
+}
+
+void QTriangulatingStroker::moveTo(const qreal *pts)
+{
+ m_cx = pts[0];
+ m_cy = pts[1];
+
+ float x2 = pts[2];
+ float y2 = pts[3];
+ normalVector(m_cx, m_cy, x2, y2, &m_nvx, &m_nvy);
+
+
+ // To acheive jumps we insert zero-area tringles. This is done by
+ // adding two identical points in both the end of previous strip
+ // and beginning of next strip
+ bool invisibleJump = m_vertices.size();
+
+ switch (m_cap_style) {
+ case Qt::FlatCap:
+ if (invisibleJump) {
+ m_vertices.add(m_cx + m_nvx);
+ m_vertices.add(m_cy + m_nvy);
+ }
+ break;
+ case Qt::SquareCap: {
+ float sx = m_cx - m_nvy;
+ float sy = m_cy + m_nvx;
+ if (invisibleJump) {
+ m_vertices.add(sx + m_nvx);
+ m_vertices.add(sy + m_nvy);
+ }
+ emitLineSegment(sx, sy, m_nvx, m_nvy);
+ break; }
+ case Qt::RoundCap: {
+ QVarLengthArray<float> points;
+ arcPoints(m_cx, m_cy, m_cx + m_nvx, m_cy + m_nvy, m_cx - m_nvx, m_cy - m_nvy, points);
+ m_vertices.resize(m_vertices.size() + points.size() + 2 * int(invisibleJump));
+ int count = m_vertices.size();
+ int front = 0;
+ int end = points.size() / 2;
+ while (front != end) {
+ m_vertices.at(--count) = points[2 * end - 1];
+ m_vertices.at(--count) = points[2 * end - 2];
+ --end;
+ if (front == end)
+ break;
+ m_vertices.at(--count) = points[2 * front + 1];
+ m_vertices.at(--count) = points[2 * front + 0];
+ ++front;
+ }
+
+ if (invisibleJump) {
+ m_vertices.at(count - 1) = m_vertices.at(count + 1);
+ m_vertices.at(count - 2) = m_vertices.at(count + 0);
+ }
+ break; }
+ default: break; // ssssh gcc...
+ }
+ emitLineSegment(m_cx, m_cy, m_nvx, m_nvy);
+}
+
+void QTriangulatingStroker::cubicTo(const qreal *pts)
+{
+ const QPointF *p = (const QPointF *) pts;
+ QBezier bezier = QBezier::fromPoints(*(p - 1), p[0], p[1], p[2]);
+
+ QRectF bounds = bezier.bounds();
+ float rad = qMax(bounds.width(), bounds.height());
+ int threshold = qMin<float>(64, (rad + m_curvyness_add) * m_curvyness_mul);
+ if (threshold < 4)
+ threshold = 4;
+ qreal threshold_minus_1 = threshold - 1;
+ float vx, vy;
+
+ float cx = m_cx, cy = m_cy;
+ float x, y;
+
+ for (int i=1; i<threshold; ++i) {
+ qreal t = qreal(i) / threshold_minus_1;
+ QPointF p = bezier.pointAt(t);
+ x = p.x();
+ y = p.y();
+
+ normalVector(cx, cy, x, y, &vx, &vy);
+
+ emitLineSegment(x, y, vx, vy);
+
+ cx = x;
+ cy = y;
+ }
+
+ m_cx = cx;
+ m_cy = cy;
+
+ m_nvx = vx;
+ m_nvy = vy;
+}
+
+void QTriangulatingStroker::join(const qreal *pts)
+{
+ // Creates a join to the next segment (m_cx, m_cy) -> (pts[0], pts[1])
+ normalVector(m_cx, m_cy, pts[0], pts[1], &m_nvx, &m_nvy);
+
+ switch (m_join_style) {
+ case Qt::BevelJoin:
+ break;
+ case Qt::SvgMiterJoin:
+ case Qt::MiterJoin: {
+ // Find out on which side the join should be.
+ int count = m_vertices.size();
+ float prevNvx = m_vertices.at(count - 2) - m_cx;
+ float prevNvy = m_vertices.at(count - 1) - m_cy;
+ float xprod = prevNvx * m_nvy - prevNvy * m_nvx;
+ float px, py, qx, qy;
+
+ // If the segments are parallel, use bevel join.
+ if (qFuzzyIsNull(xprod))
+ break;
+
+ // Find the corners of the previous and next segment to join.
+ if (xprod < 0) {
+ px = m_vertices.at(count - 2);
+ py = m_vertices.at(count - 1);
+ qx = m_cx - m_nvx;
+ qy = m_cy - m_nvy;
+ } else {
+ px = m_vertices.at(count - 4);
+ py = m_vertices.at(count - 3);
+ qx = m_cx + m_nvx;
+ qy = m_cy + m_nvy;
+ }
+
+ // Find intersection point.
+ float pu = px * prevNvx + py * prevNvy;
+ float qv = qx * m_nvx + qy * m_nvy;
+ float ix = (m_nvy * pu - prevNvy * qv) / xprod;
+ float iy = (prevNvx * qv - m_nvx * pu) / xprod;
+
+ // Check that the distance to the intersection point is less than the miter limit.
+ if ((ix - px) * (ix - px) + (iy - py) * (iy - py) <= m_miter_limit * m_miter_limit) {
+ m_vertices.add(ix);
+ m_vertices.add(iy);
+ m_vertices.add(ix);
+ m_vertices.add(iy);
+ }
+ // else
+ // Do a plain bevel join if the miter limit is exceeded or if
+ // the lines are parallel. This is not what the raster
+ // engine's stroker does, but it is both faster and similar to
+ // what some other graphics API's do.
+
+ break; }
+ case Qt::RoundJoin: {
+ QVarLengthArray<float> points;
+ int count = m_vertices.size();
+ float prevNvx = m_vertices.at(count - 2) - m_cx;
+ float prevNvy = m_vertices.at(count - 1) - m_cy;
+ if (m_nvx * prevNvy - m_nvy * prevNvx < 0) {
+ arcPoints(0, 0, m_nvx, m_nvy, -prevNvx, -prevNvy, points);
+ for (int i = points.size() / 2; i > 0; --i)
+ emitLineSegment(m_cx, m_cy, points[2 * i - 2], points[2 * i - 1]);
+ } else {
+ arcPoints(0, 0, -prevNvx, -prevNvy, m_nvx, m_nvy, points);
+ for (int i = 0; i < points.size() / 2; ++i)
+ emitLineSegment(m_cx, m_cy, points[2 * i + 0], points[2 * i + 1]);
+ }
+ break; }
+ default: break; // gcc warn--
+ }
+
+ emitLineSegment(m_cx, m_cy, m_nvx, m_nvy);
+}
+
+void QTriangulatingStroker::endCap(const qreal *)
+{
+ switch (m_cap_style) {
+ case Qt::FlatCap:
+ break;
+ case Qt::SquareCap:
+ emitLineSegment(m_cx + m_nvy, m_cy - m_nvx, m_nvx, m_nvy);
+ break;
+ case Qt::RoundCap: {
+ QVarLengthArray<float> points;
+ int count = m_vertices.size();
+ arcPoints(m_cx, m_cy, m_vertices.at(count - 2), m_vertices.at(count - 1), m_vertices.at(count - 4), m_vertices.at(count - 3), points);
+ int front = 0;
+ int end = points.size() / 2;
+ while (front != end) {
+ m_vertices.add(points[2 * end - 2]);
+ m_vertices.add(points[2 * end - 1]);
+ --end;
+ if (front == end)
+ break;
+ m_vertices.add(points[2 * front + 0]);
+ m_vertices.add(points[2 * front + 1]);
+ ++front;
+ }
+ break; }
+ default: break; // to shut gcc up...
+ }
+}
+
+void QTriangulatingStroker::arcPoints(float cx, float cy, float fromX, float fromY, float toX, float toY, QVarLengthArray<float> &points)
+{
+ float dx1 = fromX - cx;
+ float dy1 = fromY - cy;
+ float dx2 = toX - cx;
+ float dy2 = toY - cy;
+
+ // while more than 180 degrees left:
+ while (dx1 * dy2 - dx2 * dy1 < 0) {
+ float tmpx = dx1 * m_cos_theta - dy1 * m_sin_theta;
+ float tmpy = dx1 * m_sin_theta + dy1 * m_cos_theta;
+ dx1 = tmpx;
+ dy1 = tmpy;
+ points.append(cx + dx1);
+ points.append(cy + dy1);
+ }
+
+ // while more than 90 degrees left:
+ while (dx1 * dx2 + dy1 * dy2 < 0) {
+ float tmpx = dx1 * m_cos_theta - dy1 * m_sin_theta;
+ float tmpy = dx1 * m_sin_theta + dy1 * m_cos_theta;
+ dx1 = tmpx;
+ dy1 = tmpy;
+ points.append(cx + dx1);
+ points.append(cy + dy1);
+ }
+
+ // while more than 0 degrees left:
+ while (dx1 * dy2 - dx2 * dy1 > 0) {
+ float tmpx = dx1 * m_cos_theta - dy1 * m_sin_theta;
+ float tmpy = dx1 * m_sin_theta + dy1 * m_cos_theta;
+ dx1 = tmpx;
+ dy1 = tmpy;
+ points.append(cx + dx1);
+ points.append(cy + dy1);
+ }
+
+ // remove last point which was rotated beyond [toX, toY].
+ if (!points.isEmpty())
+ points.resize(points.size() - 2);
+}
+
+static void qdashprocessor_moveTo(qreal x, qreal y, void *data)
+{
+ ((QDashedStrokeProcessor *) data)->addElement(QPainterPath::MoveToElement, x, y);
+}
+
+static void qdashprocessor_lineTo(qreal x, qreal y, void *data)
+{
+ ((QDashedStrokeProcessor *) data)->addElement(QPainterPath::LineToElement, x, y);
+}
+
+static void qdashprocessor_cubicTo(qreal, qreal, qreal, qreal, qreal, qreal, void *)
+{
+ Q_ASSERT(0); // The dasher should not produce curves...
+}
+
+QDashedStrokeProcessor::QDashedStrokeProcessor()
+ : m_points(0), m_types(0),
+ m_dash_stroker(0), m_inv_scale(1)
+{
+ m_dash_stroker.setMoveToHook(qdashprocessor_moveTo);
+ m_dash_stroker.setLineToHook(qdashprocessor_lineTo);
+ m_dash_stroker.setCubicToHook(qdashprocessor_cubicTo);
+}
+
+void QDashedStrokeProcessor::process(const QVectorPath &path, const QPen &pen, const QRectF &clip)
+{
+
+ const qreal *pts = path.points();
+ const QPainterPath::ElementType *types = path.elements();
+ int count = path.elementCount();
+
+ bool cosmetic = pen.isCosmetic();
+
+ m_points.reset();
+ m_types.reset();
+ m_points.reserve(path.elementCount());
+ m_types.reserve(path.elementCount());
+
+ qreal width = qpen_widthf(pen);
+ if (width == 0)
+ width = 1;
+
+ m_dash_stroker.setDashPattern(pen.dashPattern());
+ m_dash_stroker.setStrokeWidth(cosmetic ? width * m_inv_scale : width);
+ m_dash_stroker.setDashOffset(pen.dashOffset());
+ m_dash_stroker.setMiterLimit(pen.miterLimit());
+ m_dash_stroker.setClipRect(clip);
+
+ float curvynessAdd, curvynessMul, roundness = 0;
+
+ // simplfy pens that are thin in device size (2px wide or less)
+ if (width < 2.5 && (cosmetic || m_inv_scale == 1)) {
+ curvynessAdd = 0.5;
+ curvynessMul = CURVE_FLATNESS / m_inv_scale;
+ roundness = 1;
+ } else if (cosmetic) {
+ curvynessAdd= width / 2;
+ curvynessMul= CURVE_FLATNESS;
+ roundness = qMax<int>(4, width * CURVE_FLATNESS);
+ } else {
+ curvynessAdd = width * m_inv_scale;
+ curvynessMul = CURVE_FLATNESS / m_inv_scale;
+ roundness = qMax<int>(4, width * curvynessMul);
+ }
+
+ if (count < 2)
+ return;
+
+ const qreal *endPts = pts + (count<<1);
+
+ m_dash_stroker.begin(this);
+
+ if (!types) {
+ m_dash_stroker.moveTo(pts[0], pts[1]);
+ pts += 2;
+ while (pts < endPts) {
+ m_dash_stroker.lineTo(pts[0], pts[1]);
+ pts += 2;
+ }
+ } else {
+ while (pts < endPts) {
+ switch (*types) {
+ case QPainterPath::MoveToElement:
+ m_dash_stroker.moveTo(pts[0], pts[1]);
+ pts += 2;
+ ++types;
+ break;
+ case QPainterPath::LineToElement:
+ m_dash_stroker.lineTo(pts[0], pts[1]);
+ pts += 2;
+ ++types;
+ break;
+ case QPainterPath::CurveToElement: {
+ QBezier b = QBezier::fromPoints(*(((const QPointF *) pts) - 1),
+ *(((const QPointF *) pts)),
+ *(((const QPointF *) pts) + 1),
+ *(((const QPointF *) pts) + 2));
+ QRectF bounds = b.bounds();
+ float rad = qMax(bounds.width(), bounds.height());
+ int threshold = qMin<float>(64, (rad + curvynessAdd) * curvynessMul);
+ if (threshold < 4)
+ threshold = 4;
+
+ qreal threshold_minus_1 = threshold - 1;
+ for (int i=0; i<threshold; ++i) {
+ QPointF pt = b.pointAt(i / threshold_minus_1);
+ m_dash_stroker.lineTo(pt.x(), pt.y());
+ }
+ pts += 6;
+ types += 3;
+ break; }
+ default: break;
+ }
+ }
+ }
+
+ m_dash_stroker.end();
+}
+
+QT_END_NAMESPACE
+
diff --git a/src/opengl/gl2paintengineex/qtriangulatingstroker_p.h b/src/opengl/gl2paintengineex/qtriangulatingstroker_p.h
new file mode 100644
index 0000000000..adb5d5264d
--- /dev/null
+++ b/src/opengl/gl2paintengineex/qtriangulatingstroker_p.h
@@ -0,0 +1,157 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtOpenGL module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QTRIANGULATINGSTROKER_P_H
+#define QTRIANGULATINGSTROKER_P_H
+
+#include <private/qdatabuffer_p.h>
+#include <qvarlengtharray.h>
+#include <private/qvectorpath_p.h>
+#include <private/qbezier_p.h>
+#include <private/qnumeric_p.h>
+#include <private/qmath_p.h>
+
+QT_BEGIN_NAMESPACE
+
+class QTriangulatingStroker
+{
+public:
+ QTriangulatingStroker() : m_vertices(0) {}
+ void process(const QVectorPath &path, const QPen &pen, const QRectF &clip);
+
+ inline int vertexCount() const { return m_vertices.size(); }
+ inline const float *vertices() const { return m_vertices.data(); }
+
+ inline void setInvScale(qreal invScale) { m_inv_scale = invScale; }
+
+private:
+ inline void emitLineSegment(float x, float y, float nx, float ny);
+ void moveTo(const qreal *pts);
+ inline void lineTo(const qreal *pts);
+ void cubicTo(const qreal *pts);
+ void join(const qreal *pts);
+ inline void normalVector(float x1, float y1, float x2, float y2, float *nx, float *ny);
+ void endCap(const qreal *pts);
+ void arcPoints(float cx, float cy, float fromX, float fromY, float toX, float toY, QVarLengthArray<float> &points);
+ void endCapOrJoinClosed(const qreal *start, const qreal *cur, bool implicitClose, bool endsAtStart);
+
+
+ QDataBuffer<float> m_vertices;
+
+ float m_cx, m_cy; // current points
+ float m_nvx, m_nvy; // normal vector...
+ float m_width;
+ qreal m_miter_limit;
+
+ int m_roundness; // Number of line segments in a round join
+ qreal m_sin_theta; // sin(m_roundness / 360);
+ qreal m_cos_theta; // cos(m_roundness / 360);
+ qreal m_inv_scale;
+ float m_curvyness_mul;
+ float m_curvyness_add;
+
+ Qt::PenJoinStyle m_join_style;
+ Qt::PenCapStyle m_cap_style;
+};
+
+class QDashedStrokeProcessor
+{
+public:
+ QDashedStrokeProcessor();
+
+ void process(const QVectorPath &path, const QPen &pen, const QRectF &clip);
+
+ inline void addElement(QPainterPath::ElementType type, qreal x, qreal y) {
+ m_points.add(x);
+ m_points.add(y);
+ m_types.add(type);
+ }
+
+ inline int elementCount() const { return m_types.size(); }
+ inline qreal *points() const { return m_points.data(); }
+ inline QPainterPath::ElementType *elementTypes() const { return m_types.data(); }
+
+ inline void setInvScale(qreal invScale) { m_inv_scale = invScale; }
+
+private:
+ QDataBuffer<qreal> m_points;
+ QDataBuffer<QPainterPath::ElementType> m_types;
+ QDashStroker m_dash_stroker;
+ qreal m_inv_scale;
+};
+
+inline void QTriangulatingStroker::normalVector(float x1, float y1, float x2, float y2,
+ float *nx, float *ny)
+{
+ float dx = x2 - x1;
+ float dy = y2 - y1;
+
+ float pw;
+
+ if (dx == 0)
+ pw = m_width / qAbs(dy);
+ else if (dy == 0)
+ pw = m_width / qAbs(dx);
+ else
+ pw = m_width / sqrt(dx*dx + dy*dy);
+
+ *nx = -dy * pw;
+ *ny = dx * pw;
+}
+
+inline void QTriangulatingStroker::emitLineSegment(float x, float y, float vx, float vy)
+{
+ m_vertices.add(x + vx);
+ m_vertices.add(y + vy);
+ m_vertices.add(x - vx);
+ m_vertices.add(y - vy);
+}
+
+void QTriangulatingStroker::lineTo(const qreal *pts)
+{
+ emitLineSegment(pts[0], pts[1], m_nvx, m_nvy);
+ m_cx = pts[0];
+ m_cy = pts[1];
+}
+
+QT_END_NAMESPACE
+
+#endif
diff --git a/src/opengl/gl2paintengineex/qtriangulator.cpp b/src/opengl/gl2paintengineex/qtriangulator.cpp
new file mode 100644
index 0000000000..94024f3d74
--- /dev/null
+++ b/src/opengl/gl2paintengineex/qtriangulator.cpp
@@ -0,0 +1,3114 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtOpenGL module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qtriangulator_p.h"
+
+#include <QtGui/qdialog.h>
+#include <QtGui/qevent.h>
+#include <QtGui/qpainter.h>
+#include <QtGui/qpainterpath.h>
+#include <QtGui/private/qbezier_p.h>
+#include <QtGui/private/qdatabuffer_p.h>
+#include <QtCore/qbitarray.h>
+#include <QtCore/qvarlengtharray.h>
+#include <QtCore/qqueue.h>
+#include <QtCore/qglobal.h>
+#include <QtCore/qpoint.h>
+#include <QtCore/qalgorithms.h>
+#include <QtDebug>
+
+#include <math.h>
+
+#include <private/qgl_p.h>
+
+QT_BEGIN_NAMESPACE
+
+//#define Q_TRIANGULATOR_DEBUG
+
+#define Q_FIXED_POINT_SCALE 32
+
+// Quick sort.
+template <class T, class LessThan>
+#ifdef Q_CC_RVCT // RVCT 2.2 doesn't see recursive _static_ template function
+void sort(T *array, int count, LessThan lessThan)
+#else
+static void sort(T *array, int count, LessThan lessThan)
+#endif
+{
+ // If the number of elements fall below some threshold, use insertion sort.
+ const int INSERTION_SORT_LIMIT = 7; // About 7 is fastest on my computer...
+ if (count <= INSERTION_SORT_LIMIT) {
+ for (int i = 1; i < count; ++i) {
+ T temp = array[i];
+ int j = i;
+ while (j > 0 && lessThan(temp, array[j - 1])) {
+ array[j] = array[j - 1];
+ --j;
+ }
+ array[j] = temp;
+ }
+ return;
+ }
+
+ int high = count - 1;
+ int low = 0;
+ int mid = high / 2;
+ if (lessThan(array[mid], array[low]))
+ qSwap(array[mid], array[low]);
+ if (lessThan(array[high], array[mid]))
+ qSwap(array[high], array[mid]);
+ if (lessThan(array[mid], array[low]))
+ qSwap(array[mid], array[low]);
+
+ --high;
+ ++low;
+ qSwap(array[mid], array[high]);
+ int pivot = high;
+ --high;
+
+ while (low <= high) {
+ while (!lessThan(array[pivot], array[low])) {
+ ++low;
+ if (low > high)
+ goto sort_loop_end;
+ }
+ while (!lessThan(array[high], array[pivot])) {
+ --high;
+ if (low > high)
+ goto sort_loop_end;
+ }
+ qSwap(array[low], array[high]);
+ ++low;
+ --high;
+ }
+sort_loop_end:
+ if (low != pivot)
+ qSwap(array[pivot], array[low]);
+ sort(array, low, lessThan);
+ sort(array + low + 1, count - low - 1, lessThan);
+}
+
+// Quick sort.
+template <class T>
+#ifdef Q_CC_RVCT
+void sort(T *array, int count) // RVCT 2.2 doesn't see recursive _static_ template function
+#else
+static void sort(T *array, int count)
+#endif
+{
+ // If the number of elements fall below some threshold, use insertion sort.
+ const int INSERTION_SORT_LIMIT = 25; // About 25 is fastest on my computer...
+ if (count <= INSERTION_SORT_LIMIT) {
+ for (int i = 1; i < count; ++i) {
+ T temp = array[i];
+ int j = i;
+ while (j > 0 && (temp < array[j - 1])) {
+ array[j] = array[j - 1];
+ --j;
+ }
+ array[j] = temp;
+ }
+ return;
+ }
+
+ int high = count - 1;
+ int low = 0;
+ int mid = high / 2;
+ if ((array[mid] < array[low]))
+ qSwap(array[mid], array[low]);
+ if ((array[high] < array[mid]))
+ qSwap(array[high], array[mid]);
+ if ((array[mid] < array[low]))
+ qSwap(array[mid], array[low]);
+
+ --high;
+ ++low;
+ qSwap(array[mid], array[high]);
+ int pivot = high;
+ --high;
+
+ while (low <= high) {
+ while (!(array[pivot] < array[low])) {
+ ++low;
+ if (low > high)
+ goto sort_loop_end;
+ }
+ while (!(array[high] < array[pivot])) {
+ --high;
+ if (low > high)
+ goto sort_loop_end;
+ }
+ qSwap(array[low], array[high]);
+ ++low;
+ --high;
+ }
+sort_loop_end:
+ if (low != pivot)
+ qSwap(array[pivot], array[low]);
+ sort(array, low);
+ sort(array + low + 1, count - low - 1);
+}
+
+template<typename T>
+struct QVertexSet
+{
+ inline QVertexSet() { }
+ inline QVertexSet(const QVertexSet<T> &other) : vertices(other.vertices), indices(other.indices) { }
+ QVertexSet<T> &operator = (const QVertexSet<T> &other) {vertices = other.vertices; indices = other.indices; return *this;}
+
+ // The vertices of a triangle are given by: (x[i[n]], y[i[n]]), (x[j[n]], y[j[n]]), (x[k[n]], y[k[n]]), n = 0, 1, ...
+ QVector<qreal> vertices; // [x[0], y[0], x[1], y[1], x[2], ...]
+ QVector<T> indices; // [i[0], j[0], k[0], i[1], j[1], k[1], i[2], ...]
+};
+
+//============================================================================//
+// QFraction //
+//============================================================================//
+
+// Fraction must be in the range [0, 1)
+struct QFraction
+{
+ // Comparison operators must not be called on invalid fractions.
+ inline bool operator < (const QFraction &other) const;
+ inline bool operator == (const QFraction &other) const;
+ inline bool operator != (const QFraction &other) const {return !(*this == other);}
+ inline bool operator > (const QFraction &other) const {return other < *this;}
+ inline bool operator >= (const QFraction &other) const {return !(*this < other);}
+ inline bool operator <= (const QFraction &other) const {return !(*this > other);}
+
+ inline bool isValid() const {return denominator != 0;}
+
+ // numerator and denominator must not have common denominators.
+ quint64 numerator, denominator;
+};
+
+static inline quint64 gcd(quint64 x, quint64 y)
+{
+ while (y != 0) {
+ quint64 z = y;
+ y = x % y;
+ x = z;
+ }
+ return x;
+}
+
+static inline int compare(quint64 a, quint64 b)
+{
+ return (a > b) - (a < b);
+}
+
+// Compare a/b with c/d.
+// Return negative if less, 0 if equal, positive if greater.
+// a < b, c < d
+static int qCompareFractions(quint64 a, quint64 b, quint64 c, quint64 d)
+{
+ const quint64 LIMIT = Q_UINT64_C(0x100000000);
+ for (;;) {
+ // If the products 'ad' and 'bc' fit into 64 bits, they can be directly compared.
+ if (b < LIMIT && d < LIMIT)
+ return compare(a * d, b * c);
+
+ if (a == 0 || c == 0)
+ return compare(a, c);
+
+ // a/b < c/d <=> d/c < b/a
+ quint64 b_div_a = b / a;
+ quint64 d_div_c = d / c;
+ if (b_div_a != d_div_c)
+ return compare(d_div_c, b_div_a);
+
+ // floor(d/c) == floor(b/a)
+ // frac(d/c) < frac(b/a) ?
+ // frac(x/y) = (x%y)/y
+ d -= d_div_c * c; //d %= c;
+ b -= b_div_a * a; //b %= a;
+ qSwap(a, d);
+ qSwap(b, c);
+ }
+}
+
+// Fraction must be in the range [0, 1)
+// Assume input is valid.
+static QFraction qFraction(quint64 n, quint64 d) {
+ QFraction result;
+ if (n == 0) {
+ result.numerator = 0;
+ result.denominator = 1;
+ } else {
+ quint64 g = gcd(n, d);
+ result.numerator = n / g;
+ result.denominator = d / g;
+ }
+ return result;
+}
+
+inline bool QFraction::operator < (const QFraction &other) const
+{
+ return qCompareFractions(numerator, denominator, other.numerator, other.denominator) < 0;
+}
+
+inline bool QFraction::operator == (const QFraction &other) const
+{
+ return numerator == other.numerator && denominator == other.denominator;
+}
+
+//============================================================================//
+// QPodPoint //
+//============================================================================//
+
+struct QPodPoint
+{
+ inline bool operator < (const QPodPoint &other) const
+ {
+ if (y != other.y)
+ return y < other.y;
+ return x < other.x;
+ }
+
+ inline bool operator > (const QPodPoint &other) const {return other < *this;}
+ inline bool operator <= (const QPodPoint &other) const {return !(*this > other);}
+ inline bool operator >= (const QPodPoint &other) const {return !(*this < other);}
+ inline bool operator == (const QPodPoint &other) const {return x == other.x && y == other.y;}
+ inline bool operator != (const QPodPoint &other) const {return x != other.x || y != other.y;}
+
+ inline QPodPoint &operator += (const QPodPoint &other) {x += other.x; y += other.y; return *this;}
+ inline QPodPoint &operator -= (const QPodPoint &other) {x -= other.x; y -= other.y; return *this;}
+ inline QPodPoint operator + (const QPodPoint &other) const {QPodPoint result = {x + other.x, y + other.y}; return result;}
+ inline QPodPoint operator - (const QPodPoint &other) const {QPodPoint result = {x - other.x, y - other.y}; return result;}
+
+ int x;
+ int y;
+};
+
+static inline qint64 qCross(const QPodPoint &u, const QPodPoint &v)
+{
+ return qint64(u.x) * qint64(v.y) - qint64(u.y) * qint64(v.x);
+}
+
+static inline qint64 qDot(const QPodPoint &u, const QPodPoint &v)
+{
+ return qint64(u.x) * qint64(v.x) + qint64(u.y) * qint64(v.y);
+}
+
+// Return positive value if 'p' is to the right of the line 'v1'->'v2', negative if left of the
+// line and zero if exactly on the line.
+// The returned value is the z-component of the qCross product between 'v2-v1' and 'p-v1',
+// which is twice the signed area of the triangle 'p'->'v1'->'v2' (positive for CW order).
+static inline qint64 qPointDistanceFromLine(const QPodPoint &p, const QPodPoint &v1, const QPodPoint &v2)
+{
+ return qCross(v2 - v1, p - v1);
+}
+
+static inline bool qPointIsLeftOfLine(const QPodPoint &p, const QPodPoint &v1, const QPodPoint &v2)
+{
+ return QT_PREPEND_NAMESPACE(qPointDistanceFromLine)(p, v1, v2) < 0;
+}
+
+// Return:
+// -1 if u < v
+// 0 if u == v
+// 1 if u > v
+static int comparePoints(const QPodPoint &u, const QPodPoint &v)
+{
+ if (u.y < v.y)
+ return -1;
+ if (u.y > v.y)
+ return 1;
+ if (u.x < v.x)
+ return -1;
+ if (u.x > v.x)
+ return 1;
+ return 0;
+}
+
+//============================================================================//
+// QIntersectionPoint //
+//============================================================================//
+
+struct QIntersectionPoint
+{
+ inline bool isValid() const {return xOffset.isValid() && yOffset.isValid();}
+ QPodPoint round() const;
+ inline bool isAccurate() const {return xOffset.numerator == 0 && yOffset.numerator == 0;}
+ bool operator < (const QIntersectionPoint &other) const;
+ bool operator == (const QIntersectionPoint &other) const;
+ inline bool operator != (const QIntersectionPoint &other) const {return !(*this == other);}
+ inline bool operator > (const QIntersectionPoint &other) const {return other < *this;}
+ inline bool operator >= (const QIntersectionPoint &other) const {return !(*this < other);}
+ inline bool operator <= (const QIntersectionPoint &other) const {return !(*this > other);}
+ bool isOnLine(const QPodPoint &u, const QPodPoint &v) const;
+
+ QPodPoint upperLeft;
+ QFraction xOffset;
+ QFraction yOffset;
+};
+
+static inline QIntersectionPoint qIntersectionPoint(const QPodPoint &point)
+{
+ // upperLeft = point, xOffset = 0/1, yOffset = 0/1.
+ QIntersectionPoint p = {{point.x, point.y}, {0, 1}, {0, 1}};
+ return p;
+}
+
+static inline QIntersectionPoint qIntersectionPoint(int x, int y)
+{
+ // upperLeft = (x, y), xOffset = 0/1, yOffset = 0/1.
+ QIntersectionPoint p = {{x, y}, {0, 1}, {0, 1}};
+ return p;
+}
+
+static QIntersectionPoint qIntersectionPoint(const QPodPoint &u1, const QPodPoint &u2, const QPodPoint &v1, const QPodPoint &v2)
+{
+ QIntersectionPoint result = {{0, 0}, {0, 0}, {0, 0}};
+
+ QPodPoint u = u2 - u1;
+ QPodPoint v = v2 - v1;
+ qint64 d1 = qCross(u, v1 - u1);
+ qint64 d2 = qCross(u, v2 - u1);
+ qint64 det = d2 - d1;
+ qint64 d3 = qCross(v, u1 - v1);
+ qint64 d4 = d3 - det; //qCross(v, u2 - v1);
+
+ // Check that the math is correct.
+ Q_ASSERT(d4 == qCross(v, u2 - v1));
+
+ // The intersection point can be expressed as:
+ // v1 - v * d1/det
+ // v2 - v * d2/det
+ // u1 + u * d3/det
+ // u2 + u * d4/det
+
+ // I'm only interested in lines that are crossing, so ignore parallel lines even if they overlap.
+ if (det == 0)
+ return result;
+
+ if (det < 0) {
+ det = -det;
+ d1 = -d1;
+ d2 = -d2;
+ d3 = -d3;
+ d4 = -d4;
+ }
+
+ // I'm only interested in lines intersecting at their interior, not at their end points.
+ // The lines intersect at their interior if and only if 'd1 < 0', 'd2 > 0', 'd3 < 0' and 'd4 > 0'.
+ if (d1 >= 0 || d2 <= 0 || d3 <= 0 || d4 >= 0)
+ return result;
+
+ // Calculate the intersection point as follows:
+ // v1 - v * d1/det | v1 <= v2 (component-wise)
+ // v2 - v * d2/det | v2 < v1 (component-wise)
+
+ // Assuming 21 bits per vector component.
+ // TODO: Make code path for 31 bits per vector component.
+ if (v.x >= 0) {
+ result.upperLeft.x = v1.x + (-v.x * d1) / det;
+ result.xOffset = qFraction(quint64(-v.x * d1) % quint64(det), quint64(det));
+ } else {
+ result.upperLeft.x = v2.x + (-v.x * d2) / det;
+ result.xOffset = qFraction(quint64(-v.x * d2) % quint64(det), quint64(det));
+ }
+
+ if (v.y >= 0) {
+ result.upperLeft.y = v1.y + (-v.y * d1) / det;
+ result.yOffset = qFraction(quint64(-v.y * d1) % quint64(det), quint64(det));
+ } else {
+ result.upperLeft.y = v2.y + (-v.y * d2) / det;
+ result.yOffset = qFraction(quint64(-v.y * d2) % quint64(det), quint64(det));
+ }
+
+ Q_ASSERT(result.xOffset.isValid());
+ Q_ASSERT(result.yOffset.isValid());
+ return result;
+}
+
+QPodPoint QIntersectionPoint::round() const
+{
+ QPodPoint result = upperLeft;
+ if (2 * xOffset.numerator >= xOffset.denominator)
+ ++result.x;
+ if (2 * yOffset.numerator >= yOffset.denominator)
+ ++result.y;
+ return result;
+}
+
+bool QIntersectionPoint::operator < (const QIntersectionPoint &other) const
+{
+ if (upperLeft.y != other.upperLeft.y)
+ return upperLeft.y < other.upperLeft.y;
+ if (yOffset != other.yOffset)
+ return yOffset < other.yOffset;
+ if (upperLeft.x != other.upperLeft.x)
+ return upperLeft.x < other.upperLeft.x;
+ return xOffset < other.xOffset;
+}
+
+bool QIntersectionPoint::operator == (const QIntersectionPoint &other) const
+{
+ return upperLeft == other.upperLeft && xOffset == other.xOffset && yOffset == other.yOffset;
+}
+
+// Returns true if this point is on the infinite line passing through 'u' and 'v'.
+bool QIntersectionPoint::isOnLine(const QPodPoint &u, const QPodPoint &v) const
+{
+ // TODO: Make code path for coordinates with more than 21 bits.
+ const QPodPoint p = upperLeft - u;
+ const QPodPoint q = v - u;
+ bool isHorizontal = p.y == 0 && yOffset.numerator == 0;
+ bool isVertical = p.x == 0 && xOffset.numerator == 0;
+ if (isHorizontal && isVertical)
+ return true;
+ if (isHorizontal)
+ return q.y == 0;
+ if (q.y == 0)
+ return false;
+ if (isVertical)
+ return q.x == 0;
+ if (q.x == 0)
+ return false;
+
+ // At this point, 'p+offset' and 'q' cannot lie on the x or y axis.
+
+ if (((q.x < 0) == (q.y < 0)) != ((p.x < 0) == (p.y < 0)))
+ return false; // 'p + offset' and 'q' pass through different quadrants.
+
+ // Move all coordinates into the first quadrant.
+ quint64 nx, ny;
+ if (p.x < 0)
+ nx = quint64(-p.x) * xOffset.denominator - xOffset.numerator;
+ else
+ nx = quint64(p.x) * xOffset.denominator + xOffset.numerator;
+ if (p.y < 0)
+ ny = quint64(-p.y) * yOffset.denominator - yOffset.numerator;
+ else
+ ny = quint64(p.y) * yOffset.denominator + yOffset.numerator;
+
+ return qFraction(quint64(qAbs(q.x)) * xOffset.denominator, quint64(qAbs(q.y)) * yOffset.denominator) == qFraction(nx, ny);
+}
+
+//============================================================================//
+// QMaxHeap //
+//============================================================================//
+
+template <class T>
+class QMaxHeap
+{
+public:
+ QMaxHeap() : m_data(0) {}
+ inline int size() const {return m_data.size();}
+ inline bool empty() const {return m_data.isEmpty();}
+ inline bool isEmpty() const {return m_data.isEmpty();}
+ void push(const T &x);
+ T pop();
+ inline const T &top() const {return m_data.first();}
+private:
+ static inline int parent(int i) {return (i - 1) / 2;}
+ static inline int left(int i) {return 2 * i + 1;}
+ static inline int right(int i) {return 2 * i + 2;}
+
+ QDataBuffer<T> m_data;
+};
+
+template <class T>
+void QMaxHeap<T>::push(const T &x)
+{
+ int current = m_data.size();
+ int parent = QMaxHeap::parent(current);
+ m_data.add(x);
+ while (current != 0 && m_data.at(parent) < x) {
+ m_data.at(current) = m_data.at(parent);
+ current = parent;
+ parent = QMaxHeap::parent(current);
+ }
+ m_data.at(current) = x;
+}
+
+template <class T>
+T QMaxHeap<T>::pop()
+{
+ T result = m_data.first();
+ T back = m_data.last();
+ m_data.pop_back();
+ if (!m_data.isEmpty()) {
+ int current = 0;
+ for (;;) {
+ int left = QMaxHeap::left(current);
+ int right = QMaxHeap::right(current);
+ if (left >= m_data.size())
+ break;
+ int greater = left;
+ if (right < m_data.size() && m_data.at(left) < m_data.at(right))
+ greater = right;
+ if (m_data.at(greater) < back)
+ break;
+ m_data.at(current) = m_data.at(greater);
+ current = greater;
+ }
+ m_data.at(current) = back;
+ }
+ return result;
+}
+
+//============================================================================//
+// QRBTree //
+//============================================================================//
+
+template <class T>
+struct QRBTree
+{
+ struct Node
+ {
+ inline Node() : parent(0), left(0), right(0), red(true) { }
+ inline ~Node() {if (left) delete left; if (right) delete right;}
+ T data;
+ Node *parent;
+ Node *left;
+ Node *right;
+ bool red;
+ };
+
+ inline QRBTree() : root(0), freeList(0) { }
+ inline ~QRBTree();
+
+ inline void clear();
+
+ void attachBefore(Node *parent, Node *child);
+ void attachAfter(Node *parent, Node *child);
+
+ inline Node *front(Node *node) const;
+ inline Node *back(Node *node) const;
+ Node *next(Node *node) const;
+ Node *previous(Node *node) const;
+
+ inline void deleteNode(Node *&node);
+ inline Node *newNode();
+
+ // Return 1 if 'left' comes after 'right', 0 if equal, and -1 otherwise.
+ // 'left' and 'right' cannot be null.
+ int order(Node *left, Node *right);
+ inline bool validate() const;
+
+private:
+ void rotateLeft(Node *node);
+ void rotateRight(Node *node);
+ void update(Node *node);
+
+ inline void attachLeft(Node *parent, Node *child);
+ inline void attachRight(Node *parent, Node *child);
+
+ int blackDepth(Node *top) const;
+ bool checkRedBlackProperty(Node *top) const;
+
+ void swapNodes(Node *n1, Node *n2);
+ void detach(Node *node);
+
+ // 'node' must be black. rebalance will reduce the depth of black nodes by one in the sibling tree.
+ void rebalance(Node *node);
+
+public:
+ Node *root;
+private:
+ Node *freeList;
+};
+
+template <class T>
+inline QRBTree<T>::~QRBTree()
+{
+ clear();
+ while (freeList) {
+ // Avoid recursively calling the destructor, as this list may become large.
+ Node *next = freeList->right;
+ freeList->right = 0;
+ delete freeList;
+ freeList = next;
+ }
+}
+
+template <class T>
+inline void QRBTree<T>::clear()
+{
+ if (root)
+ delete root;
+ root = 0;
+}
+
+template <class T>
+void QRBTree<T>::rotateLeft(Node *node)
+{
+ // | | //
+ // N B //
+ // / \ / \ //
+ // A B ---> N D //
+ // / \ / \ //
+ // C D A C //
+
+ Node *&ref = (node->parent ? (node == node->parent->left ? node->parent->left : node->parent->right) : root);
+ ref = node->right;
+ node->right->parent = node->parent;
+
+ // : //
+ // N //
+ // / :| //
+ // A B //
+ // / \ //
+ // C D //
+
+ node->right = ref->left;
+ if (ref->left)
+ ref->left->parent = node;
+
+ // : | //
+ // N B //
+ // / \ : \ //
+ // A C D //
+
+ ref->left = node;
+ node->parent = ref;
+
+ // | //
+ // B //
+ // / \ //
+ // N D //
+ // / \ //
+ // A C //
+}
+
+template <class T>
+void QRBTree<T>::rotateRight(Node *node)
+{
+ // | | //
+ // N A //
+ // / \ / \ //
+ // A B ---> C N //
+ // / \ / \ //
+ // C D D B //
+
+ Node *&ref = (node->parent ? (node == node->parent->left ? node->parent->left : node->parent->right) : root);
+ ref = node->left;
+ node->left->parent = node->parent;
+
+ node->left = ref->right;
+ if (ref->right)
+ ref->right->parent = node;
+
+ ref->right = node;
+ node->parent = ref;
+}
+
+template <class T>
+void QRBTree<T>::update(Node *node) // call this after inserting a node
+{
+ for (;;) {
+ Node *parent = node->parent;
+
+ // if the node is the root, color it black
+ if (!parent) {
+ node->red = false;
+ return;
+ }
+
+ // if the parent is black, the node can be left red
+ if (!parent->red)
+ return;
+
+ // at this point, the parent is red and cannot be the root
+ Node *grandpa = parent->parent;
+ Q_ASSERT(grandpa);
+
+ Node *uncle = (parent == grandpa->left ? grandpa->right : grandpa->left);
+ if (uncle && uncle->red) {
+ // grandpa's black, parent and uncle are red.
+ // let parent and uncle be black, grandpa red and recursively update grandpa.
+ Q_ASSERT(!grandpa->red);
+ parent->red = false;
+ uncle->red = false;
+ grandpa->red = true;
+ node = grandpa;
+ continue;
+ }
+
+ // at this point, uncle is black
+ if (node == parent->right && parent == grandpa->left)
+ rotateLeft(node = parent);
+ else if (node == parent->left && parent == grandpa->right)
+ rotateRight(node = parent);
+ parent = node->parent;
+
+ if (parent == grandpa->left) {
+ rotateRight(grandpa);
+ parent->red = false;
+ grandpa->red = true;
+ } else {
+ rotateLeft(grandpa);
+ parent->red = false;
+ grandpa->red = true;
+ }
+ return;
+ }
+}
+
+template <class T>
+inline void QRBTree<T>::attachLeft(Node *parent, Node *child)
+{
+ Q_ASSERT(!parent->left);
+ parent->left = child;
+ child->parent = parent;
+ update(child);
+}
+
+template <class T>
+inline void QRBTree<T>::attachRight(Node *parent, Node *child)
+{
+ Q_ASSERT(!parent->right);
+ parent->right = child;
+ child->parent = parent;
+ update(child);
+}
+
+template <class T>
+void QRBTree<T>::attachBefore(Node *parent, Node *child)
+{
+ if (!root)
+ update(root = child);
+ else if (!parent)
+ attachRight(back(root), child);
+ else if (parent->left)
+ attachRight(back(parent->left), child);
+ else
+ attachLeft(parent, child);
+}
+
+template <class T>
+void QRBTree<T>::attachAfter(Node *parent, Node *child)
+{
+ if (!root)
+ update(root = child);
+ else if (!parent)
+ attachLeft(front(root), child);
+ else if (parent->right)
+ attachLeft(front(parent->right), child);
+ else
+ attachRight(parent, child);
+}
+
+template <class T>
+void QRBTree<T>::swapNodes(Node *n1, Node *n2)
+{
+ // Since iterators must not be invalidated, it is not sufficient to only swap the data.
+ if (n1->parent == n2) {
+ n1->parent = n2->parent;
+ n2->parent = n1;
+ } else if (n2->parent == n1) {
+ n2->parent = n1->parent;
+ n1->parent = n2;
+ } else {
+ qSwap(n1->parent, n2->parent);
+ }
+
+ qSwap(n1->left, n2->left);
+ qSwap(n1->right, n2->right);
+ qSwap(n1->red, n2->red);
+
+ if (n1->parent) {
+ if (n1->parent->left == n2)
+ n1->parent->left = n1;
+ else
+ n1->parent->right = n1;
+ } else {
+ root = n1;
+ }
+
+ if (n2->parent) {
+ if (n2->parent->left == n1)
+ n2->parent->left = n2;
+ else
+ n2->parent->right = n2;
+ } else {
+ root = n2;
+ }
+
+ if (n1->left)
+ n1->left->parent = n1;
+ if (n1->right)
+ n1->right->parent = n1;
+
+ if (n2->left)
+ n2->left->parent = n2;
+ if (n2->right)
+ n2->right->parent = n2;
+}
+
+template <class T>
+void QRBTree<T>::detach(Node *node) // call this before removing a node.
+{
+ if (node->right)
+ swapNodes(node, front(node->right));
+
+ Node *child = (node->left ? node->left : node->right);
+
+ if (!node->red) {
+ if (child && child->red)
+ child->red = false;
+ else
+ rebalance(node);
+ }
+
+ Node *&ref = (node->parent ? (node == node->parent->left ? node->parent->left : node->parent->right) : root);
+ ref = child;
+ if (child)
+ child->parent = node->parent;
+ node->left = node->right = node->parent = 0;
+}
+
+// 'node' must be black. rebalance will reduce the depth of black nodes by one in the sibling tree.
+template <class T>
+void QRBTree<T>::rebalance(Node *node)
+{
+ Q_ASSERT(!node->red);
+ for (;;) {
+ if (!node->parent)
+ return;
+
+ // at this point, node is not a parent, it is black, thus it must have a sibling.
+ Node *sibling = (node == node->parent->left ? node->parent->right : node->parent->left);
+ Q_ASSERT(sibling);
+
+ if (sibling->red) {
+ sibling->red = false;
+ node->parent->red = true;
+ if (node == node->parent->left)
+ rotateLeft(node->parent);
+ else
+ rotateRight(node->parent);
+ sibling = (node == node->parent->left ? node->parent->right : node->parent->left);
+ Q_ASSERT(sibling);
+ }
+
+ // at this point, the sibling is black.
+ Q_ASSERT(!sibling->red);
+
+ if ((!sibling->left || !sibling->left->red) && (!sibling->right || !sibling->right->red)) {
+ bool parentWasRed = node->parent->red;
+ sibling->red = true;
+ node->parent->red = false;
+ if (parentWasRed)
+ return;
+ node = node->parent;
+ continue;
+ }
+
+ // at this point, at least one of the sibling's children is red.
+
+ if (node == node->parent->left) {
+ if (!sibling->right || !sibling->right->red) {
+ Q_ASSERT(sibling->left);
+ sibling->red = true;
+ sibling->left->red = false;
+ rotateRight(sibling);
+
+ sibling = sibling->parent;
+ Q_ASSERT(sibling);
+ }
+ sibling->red = node->parent->red;
+ node->parent->red = false;
+
+ Q_ASSERT(sibling->right->red);
+ sibling->right->red = false;
+ rotateLeft(node->parent);
+ } else {
+ if (!sibling->left || !sibling->left->red) {
+ Q_ASSERT(sibling->right);
+ sibling->red = true;
+ sibling->right->red = false;
+ rotateLeft(sibling);
+
+ sibling = sibling->parent;
+ Q_ASSERT(sibling);
+ }
+ sibling->red = node->parent->red;
+ node->parent->red = false;
+
+ Q_ASSERT(sibling->left->red);
+ sibling->left->red = false;
+ rotateRight(node->parent);
+ }
+ return;
+ }
+}
+
+template <class T>
+inline typename QRBTree<T>::Node *QRBTree<T>::front(Node *node) const
+{
+ while (node->left)
+ node = node->left;
+ return node;
+}
+
+template <class T>
+inline typename QRBTree<T>::Node *QRBTree<T>::back(Node *node) const
+{
+ while (node->right)
+ node = node->right;
+ return node;
+}
+
+template <class T>
+typename QRBTree<T>::Node *QRBTree<T>::next(Node *node) const
+{
+ if (node->right)
+ return front(node->right);
+ while (node->parent && node == node->parent->right)
+ node = node->parent;
+ return node->parent;
+}
+
+template <class T>
+typename QRBTree<T>::Node *QRBTree<T>::previous(Node *node) const
+{
+ if (node->left)
+ return back(node->left);
+ while (node->parent && node == node->parent->left)
+ node = node->parent;
+ return node->parent;
+}
+
+template <class T>
+int QRBTree<T>::blackDepth(Node *top) const
+{
+ if (!top)
+ return 0;
+ int leftDepth = blackDepth(top->left);
+ int rightDepth = blackDepth(top->right);
+ if (leftDepth != rightDepth)
+ return -1;
+ if (!top->red)
+ ++leftDepth;
+ return leftDepth;
+}
+
+template <class T>
+bool QRBTree<T>::checkRedBlackProperty(Node *top) const
+{
+ if (!top)
+ return true;
+ if (top->left && !checkRedBlackProperty(top->left))
+ return false;
+ if (top->right && !checkRedBlackProperty(top->right))
+ return false;
+ return !(top->red && ((top->left && top->left->red) || (top->right && top->right->red)));
+}
+
+template <class T>
+inline bool QRBTree<T>::validate() const
+{
+ return checkRedBlackProperty(root) && blackDepth(root) != -1;
+}
+
+template <class T>
+inline void QRBTree<T>::deleteNode(Node *&node)
+{
+ Q_ASSERT(node);
+ detach(node);
+ node->right = freeList;
+ freeList = node;
+ node = 0;
+}
+
+template <class T>
+inline typename QRBTree<T>::Node *QRBTree<T>::newNode()
+{
+ if (freeList) {
+ Node *node = freeList;
+ freeList = freeList->right;
+ node->parent = node->left = node->right = 0;
+ node->red = true;
+ return node;
+ }
+ return new Node;
+}
+
+// Return 1 if 'left' comes after 'right', 0 if equal, and -1 otherwise.
+// 'left' and 'right' cannot be null.
+template <class T>
+int QRBTree<T>::order(Node *left, Node *right)
+{
+ Q_ASSERT(left && right);
+ if (left == right)
+ return 0;
+
+ QVector<Node *> leftAncestors;
+ QVector<Node *> rightAncestors;
+ while (left) {
+ leftAncestors.push_back(left);
+ left = left->parent;
+ }
+ while (right) {
+ rightAncestors.push_back(right);
+ right = right->parent;
+ }
+ Q_ASSERT(leftAncestors.back() == root && rightAncestors.back() == root);
+
+ while (!leftAncestors.empty() && !rightAncestors.empty() && leftAncestors.back() == rightAncestors.back()) {
+ leftAncestors.pop_back();
+ rightAncestors.pop_back();
+ }
+
+ if (!leftAncestors.empty())
+ return (leftAncestors.back() == leftAncestors.back()->parent->left ? -1 : 1);
+
+ if (!rightAncestors.empty())
+ return (rightAncestors.back() == rightAncestors.back()->parent->right ? -1 : 1);
+
+ // The code should never reach this point.
+ Q_ASSERT(!leftAncestors.empty() || !rightAncestors.empty());
+ return 0;
+}
+
+//============================================================================//
+// QInt64Hash //
+//============================================================================//
+
+// Copied from qhash.cpp
+static const uchar prime_deltas[] = {
+ 0, 0, 1, 3, 1, 5, 3, 3, 1, 9, 7, 5, 3, 9, 25, 3,
+ 1, 21, 3, 21, 7, 15, 9, 5, 3, 29, 15, 0, 0, 0, 0, 0
+};
+
+// Copied from qhash.cpp
+static inline int primeForNumBits(int numBits)
+{
+ return (1 << numBits) + prime_deltas[numBits];
+}
+
+static inline int primeForCount(int count)
+{
+ int low = 0;
+ int high = 32;
+ for (int i = 0; i < 5; ++i) {
+ int mid = (high + low) / 2;
+ if (count >= 1 << mid)
+ low = mid;
+ else
+ high = mid;
+ }
+ return primeForNumBits(high);
+}
+
+// Hash set of quint64s. Elements cannot be removed without clearing the
+// entire set. A value of -1 is used to mark unused entries.
+class QInt64Set
+{
+public:
+ inline QInt64Set(int capacity = 64);
+ inline ~QInt64Set() {if (m_array) delete[] m_array;}
+ inline bool isValid() const {return m_array;}
+ void insert(quint64 key);
+ bool contains(quint64 key) const;
+ inline void clear();
+private:
+ bool rehash(int capacity);
+
+ static const quint64 UNUSED;
+
+ quint64 *m_array;
+ int m_capacity;
+ int m_count;
+};
+
+const quint64 QInt64Set::UNUSED = quint64(-1);
+
+inline QInt64Set::QInt64Set(int capacity)
+{
+ m_capacity = primeForCount(capacity);
+ m_array = new quint64[m_capacity];
+ if (m_array)
+ clear();
+ else
+ m_capacity = 0;
+}
+
+bool QInt64Set::rehash(int capacity)
+{
+ quint64 *oldArray = m_array;
+ int oldCapacity = m_capacity;
+
+ m_capacity = capacity;
+ m_array = new quint64[m_capacity];
+ if (m_array) {
+ clear();
+ if (oldArray) {
+ for (int i = 0; i < oldCapacity; ++i) {
+ if (oldArray[i] != UNUSED)
+ insert(oldArray[i]);
+ }
+ delete[] oldArray;
+ }
+ return true;
+ } else {
+ m_capacity = oldCapacity;
+ m_array = oldArray;
+ return false;
+ }
+}
+
+void QInt64Set::insert(quint64 key)
+{
+ if (m_count > 3 * m_capacity / 4)
+ rehash(primeForCount(2 * m_capacity));
+ Q_ASSERT_X(m_array, "QInt64Hash<T>::insert", "Hash set not allocated.");
+ int index = int(key % m_capacity);
+ for (int i = 0; i < m_capacity; ++i) {
+ index += i;
+ if (index >= m_capacity)
+ index -= m_capacity;
+ if (m_array[index] == key)
+ return;
+ if (m_array[index] == UNUSED) {
+ ++m_count;
+ m_array[index] = key;
+ return;
+ }
+ }
+ Q_ASSERT_X(0, "QInt64Hash<T>::insert", "Hash set full.");
+}
+
+bool QInt64Set::contains(quint64 key) const
+{
+ Q_ASSERT_X(m_array, "QInt64Hash<T>::contains", "Hash set not allocated.");
+ int index = int(key % m_capacity);
+ for (int i = 0; i < m_capacity; ++i) {
+ index += i;
+ if (index >= m_capacity)
+ index -= m_capacity;
+ if (m_array[index] == key)
+ return true;
+ if (m_array[index] == UNUSED)
+ return false;
+ }
+ return false;
+}
+
+inline void QInt64Set::clear()
+{
+ Q_ASSERT_X(m_array, "QInt64Hash<T>::clear", "Hash set not allocated.");
+ for (int i = 0; i < m_capacity; ++i)
+ m_array[i] = UNUSED;
+ m_count = 0;
+}
+
+//============================================================================//
+// QRingBuffer //
+//============================================================================//
+
+// T must be POD.
+template <class T>
+class QRingBuffer
+{
+public:
+ inline QRingBuffer() : m_array(0), m_head(0), m_size(0), m_capacity(0) { }
+ inline ~QRingBuffer() {if (m_array) delete[] m_array;}
+ bool reallocate(int capacity);
+ inline const T &head() const {Q_ASSERT(m_size > 0); return m_array[m_head];}
+ inline const T &dequeue();
+ inline void enqueue(const T &x);
+ inline bool isEmpty() const {return m_size == 0;}
+private:
+ T *m_array;
+ int m_head;
+ int m_size;
+ int m_capacity;
+};
+
+template <class T>
+bool QRingBuffer<T>::reallocate(int capacity)
+{
+ T *oldArray = m_array;
+ m_array = new T[capacity];
+ if (m_array) {
+ if (oldArray) {
+ if (m_head + m_size > m_capacity) {
+ memcpy(m_array, oldArray + m_head, (m_capacity - m_head) * sizeof(T));
+ memcpy(m_array + (m_capacity - m_head), oldArray, (m_head + m_size - m_capacity) * sizeof(T));
+ } else {
+ memcpy(m_array, oldArray + m_head, m_size * sizeof(T));
+ }
+ delete[] oldArray;
+ }
+ m_capacity = capacity;
+ m_head = 0;
+ return true;
+ } else {
+ m_array = oldArray;
+ return false;
+ }
+}
+
+template <class T>
+inline const T &QRingBuffer<T>::dequeue()
+{
+ Q_ASSERT(m_size > 0);
+ Q_ASSERT(m_array);
+ Q_ASSERT(m_capacity >= m_size);
+ int index = m_head;
+ if (++m_head >= m_capacity)
+ m_head -= m_capacity;
+ --m_size;
+ return m_array[index];
+}
+
+template <class T>
+inline void QRingBuffer<T>::enqueue(const T &x)
+{
+ if (m_size == m_capacity)
+ reallocate(qMax(2 * m_capacity, 64));
+ int index = m_head + m_size;
+ if (index >= m_capacity)
+ index -= m_capacity;
+ m_array[index] = x;
+ ++m_size;
+}
+
+//============================================================================//
+// QTriangulator //
+//============================================================================//
+template<typename T>
+class QTriangulator
+{
+public:
+ typedef QVarLengthArray<int, 6> ShortArray;
+
+ //================================//
+ // QTriangulator::ComplexToSimple //
+ //================================//
+ friend class ComplexToSimple;
+ class ComplexToSimple
+ {
+ public:
+ inline ComplexToSimple(QTriangulator<T> *parent) : m_parent(parent),
+ m_edges(0), m_events(0), m_splits(0) { }
+ void decompose();
+ private:
+ struct Edge
+ {
+ inline int &upper() {return pointingUp ? to : from;}
+ inline int &lower() {return pointingUp ? from : to;}
+ inline int upper() const {return pointingUp ? to : from;}
+ inline int lower() const {return pointingUp ? from : to;}
+
+ QRBTree<int>::Node *node;
+ int from, to; // vertex
+ int next, previous; // edge
+ int winding;
+ bool mayIntersect;
+ bool pointingUp, originallyPointingUp;
+ };
+
+ friend class CompareEdges;
+ class CompareEdges
+ {
+ public:
+ inline CompareEdges(ComplexToSimple *parent) : m_parent(parent) { }
+ bool operator () (int i, int j) const;
+ private:
+ ComplexToSimple *m_parent;
+ };
+
+ struct Intersection
+ {
+ bool operator < (const Intersection &other) const {return other.intersectionPoint < intersectionPoint;}
+
+ QIntersectionPoint intersectionPoint;
+ int vertex;
+ int leftEdge;
+ int rightEdge;
+ };
+
+ struct Split
+ {
+ int vertex;
+ int edge;
+ bool accurate;
+ };
+
+ struct Event
+ {
+ enum Type {Upper, Lower};
+ inline bool operator < (const Event &other) const;
+
+ QPodPoint point;
+ Type type;
+ int edge;
+ };
+
+#ifdef Q_TRIANGULATOR_DEBUG
+ friend class DebugDialog;
+ friend class QTriangulator;
+ class DebugDialog : public QDialog
+ {
+ public:
+ DebugDialog(ComplexToSimple *parent, int currentVertex);
+ protected:
+ void paintEvent(QPaintEvent *);
+ void wheelEvent(QWheelEvent *);
+ void mouseMoveEvent(QMouseEvent *);
+ void mousePressEvent(QMouseEvent *);
+ private:
+ ComplexToSimple *m_parent;
+ QRectF m_window;
+ QPoint m_lastMousePos;
+ int m_vertex;
+ };
+#endif
+
+ void initEdges();
+ bool calculateIntersection(int left, int right);
+ bool edgeIsLeftOfEdge(int leftEdgeIndex, int rightEdgeIndex) const;
+ QRBTree<int>::Node *searchEdgeLeftOf(int edgeIndex) const;
+ QRBTree<int>::Node *searchEdgeLeftOf(int edgeIndex, QRBTree<int>::Node *after) const;
+ QPair<QRBTree<int>::Node *, QRBTree<int>::Node *> bounds(const QPodPoint &point) const;
+ QPair<QRBTree<int>::Node *, QRBTree<int>::Node *> outerBounds(const QPodPoint &point) const;
+ void splitEdgeListRange(QRBTree<int>::Node *leftmost, QRBTree<int>::Node *rightmost, int vertex, const QIntersectionPoint &intersectionPoint);
+ void reorderEdgeListRange(QRBTree<int>::Node *leftmost, QRBTree<int>::Node *rightmost);
+ void sortEdgeList(const QPodPoint eventPoint);
+ void fillPriorityQueue();
+ void calculateIntersections();
+ int splitEdge(int splitIndex);
+ bool splitEdgesAtIntersections();
+ void insertEdgeIntoVectorIfWanted(ShortArray &orderedEdges, int i);
+ void removeUnwantedEdgesAndConnect();
+ void removeUnusedPoints();
+
+ QTriangulator *m_parent;
+ QDataBuffer<Edge> m_edges;
+ QRBTree<int> m_edgeList;
+ QDataBuffer<Event> m_events;
+ QDataBuffer<Split> m_splits;
+ QMaxHeap<Intersection> m_topIntersection;
+ QInt64Set m_processedEdgePairs;
+ int m_initialPointCount;
+ };
+#ifdef Q_TRIANGULATOR_DEBUG
+ friend class ComplexToSimple::DebugDialog;
+#endif
+
+ //=================================//
+ // QTriangulator::SimpleToMonotone //
+ //=================================//
+ friend class SimpleToMonotone;
+ class SimpleToMonotone
+ {
+ public:
+ inline SimpleToMonotone(QTriangulator<T> *parent) : m_parent(parent), m_edges(0), m_upperVertex(0) { }
+ void decompose();
+ private:
+ enum VertexType {MergeVertex, EndVertex, RegularVertex, StartVertex, SplitVertex};
+
+ struct Edge
+ {
+ QRBTree<int>::Node *node;
+ int helper, twin, next, previous;
+ T from, to;
+ VertexType type;
+ bool pointingUp;
+ int upper() const {return (pointingUp ? to : from);}
+ int lower() const {return (pointingUp ? from : to);}
+ };
+
+ friend class CompareVertices;
+ class CompareVertices
+ {
+ public:
+ CompareVertices(SimpleToMonotone *parent) : m_parent(parent) { }
+ bool operator () (int i, int j) const;
+ private:
+ SimpleToMonotone *m_parent;
+ };
+
+ void setupDataStructures();
+ void removeZeroLengthEdges();
+ void fillPriorityQueue();
+ bool edgeIsLeftOfEdge(int leftEdgeIndex, int rightEdgeIndex) const;
+ // Returns the rightmost edge not to the right of the given edge.
+ QRBTree<int>::Node *searchEdgeLeftOfEdge(int edgeIndex) const;
+ // Returns the rightmost edge left of the given point.
+ QRBTree<int>::Node *searchEdgeLeftOfPoint(int pointIndex) const;
+ void classifyVertex(int i);
+ void classifyVertices();
+ bool pointIsInSector(const QPodPoint &p, const QPodPoint &v1, const QPodPoint &v2, const QPodPoint &v3);
+ bool pointIsInSector(int vertex, int sector);
+ int findSector(int edge, int vertex);
+ void createDiagonal(int lower, int upper);
+ void monotoneDecomposition();
+
+ QTriangulator *m_parent;
+ QRBTree<int> m_edgeList;
+ QDataBuffer<Edge> m_edges;
+ QDataBuffer<int> m_upperVertex;
+ bool m_clockwiseOrder;
+ };
+
+ //====================================//
+ // QTriangulator::MonotoneToTriangles //
+ //====================================//
+ friend class MonotoneToTriangles;
+ class MonotoneToTriangles
+ {
+ public:
+ inline MonotoneToTriangles(QTriangulator<T> *parent) : m_parent(parent) { }
+ void decompose();
+ private:
+ inline T indices(int index) const {return m_parent->m_indices.at(index + m_first);}
+ inline int next(int index) const {return (index + 1) % m_length;}
+ inline int previous(int index) const {return (index + m_length - 1) % m_length;}
+ inline bool less(int i, int j) const {return m_parent->m_vertices.at((qint32)indices(i)) < m_parent->m_vertices.at(indices(j));}
+ inline bool leftOfEdge(int i, int j, int k) const
+ {
+ return qPointIsLeftOfLine(m_parent->m_vertices.at((qint32)indices(i)),
+ m_parent->m_vertices.at((qint32)indices(j)), m_parent->m_vertices.at((qint32)indices(k)));
+ }
+
+ QTriangulator<T> *m_parent;
+ int m_first;
+ int m_length;
+ };
+
+ inline QTriangulator() : m_vertices(0) { }
+
+ // Call this only once.
+ void initialize(const qreal *polygon, int count, uint hint, const QTransform &matrix);
+ // Call this only once.
+ void initialize(const QVectorPath &path, const QTransform &matrix, qreal lod);
+ // Call this only once.
+ void initialize(const QPainterPath &path, const QTransform &matrix, qreal lod);
+ // Call either triangulate() or polyline() only once.
+ QVertexSet<T> triangulate();
+ QVertexSet<T> polyline();
+private:
+ QDataBuffer<QPodPoint> m_vertices;
+ QVector<T> m_indices;
+ uint m_hint;
+};
+
+//============================================================================//
+// QTriangulator //
+//============================================================================//
+
+template <typename T>
+QVertexSet<T> QTriangulator<T>::triangulate()
+{
+ for (int i = 0; i < m_vertices.size(); ++i) {
+ Q_ASSERT(qAbs(m_vertices.at(i).x) < (1 << 21));
+ Q_ASSERT(qAbs(m_vertices.at(i).y) < (1 << 21));
+ }
+
+ if (!(m_hint & (QVectorPath::OddEvenFill | QVectorPath::WindingFill)))
+ m_hint |= QVectorPath::OddEvenFill;
+
+ if (m_hint & QVectorPath::NonConvexShapeMask) {
+ ComplexToSimple c2s(this);
+ c2s.decompose();
+ SimpleToMonotone s2m(this);
+ s2m.decompose();
+ }
+ MonotoneToTriangles m2t(this);
+ m2t.decompose();
+
+ QVertexSet<T> result;
+ result.indices = m_indices;
+ result.vertices.resize(2 * m_vertices.size());
+ for (int i = 0; i < m_vertices.size(); ++i) {
+ result.vertices[2 * i + 0] = qreal(m_vertices.at(i).x) / Q_FIXED_POINT_SCALE;
+ result.vertices[2 * i + 1] = qreal(m_vertices.at(i).y) / Q_FIXED_POINT_SCALE;
+ }
+ return result;
+}
+
+template <typename T>
+QVertexSet<T> QTriangulator<T>::polyline()
+{
+ QVertexSet<T> result;
+ result.indices = m_indices;
+ result.vertices.resize(2 * m_vertices.size());
+ for (int i = 0; i < m_vertices.size(); ++i) {
+ result.vertices[2 * i + 0] = qreal(m_vertices.at(i).x) / Q_FIXED_POINT_SCALE;
+ result.vertices[2 * i + 1] = qreal(m_vertices.at(i).y) / Q_FIXED_POINT_SCALE;
+ }
+ return result;
+}
+
+template <typename T>
+void QTriangulator<T>::initialize(const qreal *polygon, int count, uint hint, const QTransform &matrix)
+{
+ m_hint = hint;
+ m_vertices.resize(count);
+ m_indices.resize(count + 1);
+ for (int i = 0; i < count; ++i) {
+ qreal x, y;
+ matrix.map(polygon[2 * i + 0], polygon[2 * i + 1], &x, &y);
+ m_vertices.at(i).x = qRound(x * Q_FIXED_POINT_SCALE);
+ m_vertices.at(i).y = qRound(y * Q_FIXED_POINT_SCALE);
+ m_indices[i] = i;
+ }
+ m_indices[count] = T(-1); //Q_TRIANGULATE_END_OF_POLYGON
+}
+
+template <typename T>
+void QTriangulator<T>::initialize(const QVectorPath &path, const QTransform &matrix, qreal lod)
+{
+ m_hint = path.hints();
+ // Curved paths will be converted to complex polygons.
+ m_hint &= ~QVectorPath::CurvedShapeMask;
+
+ const qreal *p = path.points();
+ const QPainterPath::ElementType *e = path.elements();
+ if (e) {
+ for (int i = 0; i < path.elementCount(); ++i, ++e, p += 2) {
+ switch (*e) {
+ case QPainterPath::MoveToElement:
+ if (!m_indices.isEmpty())
+ m_indices.push_back(T(-1)); // Q_TRIANGULATE_END_OF_POLYGON
+ // Fall through.
+ case QPainterPath::LineToElement:
+ m_indices.push_back(T(m_vertices.size()));
+ m_vertices.resize(m_vertices.size() + 1);
+ qreal x, y;
+ matrix.map(p[0], p[1], &x, &y);
+ m_vertices.last().x = qRound(x * Q_FIXED_POINT_SCALE);
+ m_vertices.last().y = qRound(y * Q_FIXED_POINT_SCALE);
+ break;
+ case QPainterPath::CurveToElement:
+ {
+ qreal pts[8];
+ for (int i = 0; i < 4; ++i)
+ matrix.map(p[2 * i - 2], p[2 * i - 1], &pts[2 * i + 0], &pts[2 * i + 1]);
+ for (int i = 0; i < 8; ++i)
+ pts[i] *= lod;
+ QBezier bezier = QBezier::fromPoints(QPointF(pts[0], pts[1]), QPointF(pts[2], pts[3]), QPointF(pts[4], pts[5]), QPointF(pts[6], pts[7]));
+ QPolygonF poly = bezier.toPolygon();
+ // Skip first point, it already exists in 'm_vertices'.
+ for (int j = 1; j < poly.size(); ++j) {
+ m_indices.push_back(T(m_vertices.size()));
+ m_vertices.resize(m_vertices.size() + 1);
+ m_vertices.last().x = qRound(poly.at(j).x() * Q_FIXED_POINT_SCALE / lod);
+ m_vertices.last().y = qRound(poly.at(j).y() * Q_FIXED_POINT_SCALE / lod);
+ }
+ }
+ i += 2;
+ e += 2;
+ p += 4;
+ break;
+ default:
+ Q_ASSERT_X(0, "QTriangulator::triangulate", "Unexpected element type.");
+ break;
+ }
+ }
+ } else {
+ for (int i = 0; i < path.elementCount(); ++i, p += 2) {
+ m_indices.push_back(T(m_vertices.size()));
+ m_vertices.resize(m_vertices.size() + 1);
+ qreal x, y;
+ matrix.map(p[0], p[1], &x, &y);
+ m_vertices.last().x = qRound(x * Q_FIXED_POINT_SCALE);
+ m_vertices.last().y = qRound(y * Q_FIXED_POINT_SCALE);
+ }
+ }
+ m_indices.push_back(T(-1)); // Q_TRIANGULATE_END_OF_POLYGON
+}
+
+template <typename T>
+void QTriangulator<T>::initialize(const QPainterPath &path, const QTransform &matrix, qreal lod)
+{
+ initialize(qtVectorPathForPath(path), matrix, lod);
+}
+
+//============================================================================//
+// QTriangulator::ComplexToSimple //
+//============================================================================//
+template <typename T>
+void QTriangulator<T>::ComplexToSimple::decompose()
+{
+ m_initialPointCount = m_parent->m_vertices.size();
+ initEdges();
+ do {
+ calculateIntersections();
+ } while (splitEdgesAtIntersections());
+
+ removeUnwantedEdgesAndConnect();
+ removeUnusedPoints();
+
+ m_parent->m_indices.clear();
+ QBitArray processed(m_edges.size(), false);
+ for (int first = 0; first < m_edges.size(); ++first) {
+ // If already processed, or if unused path, skip.
+ if (processed.at(first) || m_edges.at(first).next == -1)
+ continue;
+
+ int i = first;
+ do {
+ Q_ASSERT(!processed.at(i));
+ Q_ASSERT(m_edges.at(m_edges.at(i).next).previous == i);
+ m_parent->m_indices.push_back(m_edges.at(i).from);
+ processed.setBit(i);
+ i = m_edges.at(i).next; // CCW order
+ } while (i != first);
+ m_parent->m_indices.push_back(T(-1)); // Q_TRIANGULATE_END_OF_POLYGON
+ }
+}
+
+template <typename T>
+void QTriangulator<T>::ComplexToSimple::initEdges()
+{
+ // Initialize edge structure.
+ // 'next' and 'previous' are not being initialized at this point.
+ int first = 0;
+ for (int i = 0; i < m_parent->m_indices.size(); ++i) {
+ if (m_parent->m_indices.at(i) == T(-1)) { // Q_TRIANGULATE_END_OF_POLYGON
+ if (m_edges.size() != first)
+ m_edges.last().to = m_edges.at(first).from;
+ first = m_edges.size();
+ } else {
+ Q_ASSERT(i + 1 < m_parent->m_indices.size());
+ // {node, from, to, next, previous, winding, mayIntersect, pointingUp, originallyPointingUp}
+ Edge edge = {0, m_parent->m_indices.at(i), m_parent->m_indices.at(i + 1), -1, -1, 0, true, false, false};
+ m_edges.add(edge);
+ }
+ }
+ if (first != m_edges.size())
+ m_edges.last().to = m_edges.at(first).from;
+ for (int i = 0; i < m_edges.size(); ++i) {
+ m_edges.at(i).originallyPointingUp = m_edges.at(i).pointingUp =
+ m_parent->m_vertices.at(m_edges.at(i).to) < m_parent->m_vertices.at(m_edges.at(i).from);
+ }
+}
+
+// Return true if new intersection was found
+template <typename T>
+bool QTriangulator<T>::ComplexToSimple::calculateIntersection(int left, int right)
+{
+ const Edge &e1 = m_edges.at(left);
+ const Edge &e2 = m_edges.at(right);
+
+ const QPodPoint &u1 = m_parent->m_vertices.at((qint32)e1.from);
+ const QPodPoint &u2 = m_parent->m_vertices.at((qint32)e1.to);
+ const QPodPoint &v1 = m_parent->m_vertices.at((qint32)e2.from);
+ const QPodPoint &v2 = m_parent->m_vertices.at((qint32)e2.to);
+ if (qMax(u1.x, u2.x) <= qMin(v1.x, v2.x))
+ return false;
+
+ quint64 key = (left > right ? (quint64(right) << 32) | quint64(left) : (quint64(left) << 32) | quint64(right));
+ if (m_processedEdgePairs.contains(key))
+ return false;
+ m_processedEdgePairs.insert(key);
+
+ Intersection intersection;
+ intersection.leftEdge = left;
+ intersection.rightEdge = right;
+ intersection.intersectionPoint = QT_PREPEND_NAMESPACE(qIntersectionPoint)(u1, u2, v1, v2);
+
+ if (!intersection.intersectionPoint.isValid())
+ return false;
+
+ Q_ASSERT(intersection.intersectionPoint.isOnLine(u1, u2));
+ Q_ASSERT(intersection.intersectionPoint.isOnLine(v1, v2));
+
+ intersection.vertex = m_parent->m_vertices.size();
+ m_topIntersection.push(intersection);
+ m_parent->m_vertices.add(intersection.intersectionPoint.round());
+ return true;
+}
+
+template <typename T>
+bool QTriangulator<T>::ComplexToSimple::edgeIsLeftOfEdge(int leftEdgeIndex, int rightEdgeIndex) const
+{
+ const Edge &leftEdge = m_edges.at(leftEdgeIndex);
+ const Edge &rightEdge = m_edges.at(rightEdgeIndex);
+ const QPodPoint &u = m_parent->m_vertices.at(rightEdge.upper());
+ const QPodPoint &l = m_parent->m_vertices.at(rightEdge.lower());
+ const QPodPoint &upper = m_parent->m_vertices.at(leftEdge.upper());
+ if (upper.x < qMin(l.x, u.x))
+ return true;
+ if (upper.x > qMax(l.x, u.x))
+ return false;
+ qint64 d = QT_PREPEND_NAMESPACE(qPointDistanceFromLine)(upper, l, u);
+ // d < 0: left, d > 0: right, d == 0: on top
+ if (d == 0)
+ d = QT_PREPEND_NAMESPACE(qPointDistanceFromLine)(m_parent->m_vertices.at(leftEdge.lower()), l, u);
+ return d < 0;
+}
+
+template <typename T>
+QRBTree<int>::Node *QTriangulator<T>::ComplexToSimple::searchEdgeLeftOf(int edgeIndex) const
+{
+ QRBTree<int>::Node *current = m_edgeList.root;
+ QRBTree<int>::Node *result = 0;
+ while (current) {
+ if (edgeIsLeftOfEdge(edgeIndex, current->data)) {
+ current = current->left;
+ } else {
+ result = current;
+ current = current->right;
+ }
+ }
+ return result;
+}
+
+template <typename T>
+QRBTree<int>::Node *QTriangulator<T>::ComplexToSimple::searchEdgeLeftOf(int edgeIndex, QRBTree<int>::Node *after) const
+{
+ if (!m_edgeList.root)
+ return after;
+ QRBTree<int>::Node *result = after;
+ QRBTree<int>::Node *current = (after ? m_edgeList.next(after) : m_edgeList.front(m_edgeList.root));
+ while (current) {
+ if (edgeIsLeftOfEdge(edgeIndex, current->data))
+ return result;
+ result = current;
+ current = m_edgeList.next(current);
+ }
+ return result;
+}
+
+template <typename T>
+QPair<QRBTree<int>::Node *, QRBTree<int>::Node *> QTriangulator<T>::ComplexToSimple::bounds(const QPodPoint &point) const
+{
+ QRBTree<int>::Node *current = m_edgeList.root;
+ QPair<QRBTree<int>::Node *, QRBTree<int>::Node *> result(0, 0);
+ while (current) {
+ const QPodPoint &v1 = m_parent->m_vertices.at(m_edges.at(current->data).lower());
+ const QPodPoint &v2 = m_parent->m_vertices.at(m_edges.at(current->data).upper());
+ qint64 d = QT_PREPEND_NAMESPACE(qPointDistanceFromLine)(point, v1, v2);
+ if (d == 0) {
+ result.first = result.second = current;
+ break;
+ }
+ current = (d < 0 ? current->left : current->right);
+ }
+ if (current == 0)
+ return result;
+
+ current = result.first->left;
+ while (current) {
+ const QPodPoint &v1 = m_parent->m_vertices.at(m_edges.at(current->data).lower());
+ const QPodPoint &v2 = m_parent->m_vertices.at(m_edges.at(current->data).upper());
+ qint64 d = QT_PREPEND_NAMESPACE(qPointDistanceFromLine)(point, v1, v2);
+ Q_ASSERT(d >= 0);
+ if (d == 0) {
+ result.first = current;
+ current = current->left;
+ } else {
+ current = current->right;
+ }
+ }
+
+ current = result.second->right;
+ while (current) {
+ const QPodPoint &v1 = m_parent->m_vertices.at(m_edges.at(current->data).lower());
+ const QPodPoint &v2 = m_parent->m_vertices.at(m_edges.at(current->data).upper());
+ qint64 d = QT_PREPEND_NAMESPACE(qPointDistanceFromLine)(point, v1, v2);
+ Q_ASSERT(d <= 0);
+ if (d == 0) {
+ result.second = current;
+ current = current->right;
+ } else {
+ current = current->left;
+ }
+ }
+
+ return result;
+}
+
+template <typename T>
+QPair<QRBTree<int>::Node *, QRBTree<int>::Node *> QTriangulator<T>::ComplexToSimple::outerBounds(const QPodPoint &point) const
+{
+ QRBTree<int>::Node *current = m_edgeList.root;
+ QPair<QRBTree<int>::Node *, QRBTree<int>::Node *> result(0, 0);
+
+ while (current) {
+ const QPodPoint &v1 = m_parent->m_vertices.at(m_edges.at(current->data).lower());
+ const QPodPoint &v2 = m_parent->m_vertices.at(m_edges.at(current->data).upper());
+ qint64 d = QT_PREPEND_NAMESPACE(qPointDistanceFromLine)(point, v1, v2);
+ if (d == 0)
+ break;
+ if (d < 0) {
+ result.second = current;
+ current = current->left;
+ } else {
+ result.first = current;
+ current = current->right;
+ }
+ }
+
+ if (!current)
+ return result;
+
+ QRBTree<int>::Node *mid = current;
+
+ current = mid->left;
+ while (current) {
+ const QPodPoint &v1 = m_parent->m_vertices.at(m_edges.at(current->data).lower());
+ const QPodPoint &v2 = m_parent->m_vertices.at(m_edges.at(current->data).upper());
+ qint64 d = QT_PREPEND_NAMESPACE(qPointDistanceFromLine)(point, v1, v2);
+ Q_ASSERT(d >= 0);
+ if (d == 0) {
+ current = current->left;
+ } else {
+ result.first = current;
+ current = current->right;
+ }
+ }
+
+ current = mid->right;
+ while (current) {
+ const QPodPoint &v1 = m_parent->m_vertices.at(m_edges.at(current->data).lower());
+ const QPodPoint &v2 = m_parent->m_vertices.at(m_edges.at(current->data).upper());
+ qint64 d = QT_PREPEND_NAMESPACE(qPointDistanceFromLine)(point, v1, v2);
+ Q_ASSERT(d <= 0);
+ if (d == 0) {
+ current = current->right;
+ } else {
+ result.second = current;
+ current = current->left;
+ }
+ }
+
+ return result;
+}
+
+template <typename T>
+void QTriangulator<T>::ComplexToSimple::splitEdgeListRange(QRBTree<int>::Node *leftmost, QRBTree<int>::Node *rightmost, int vertex, const QIntersectionPoint &intersectionPoint)
+{
+ Q_ASSERT(leftmost && rightmost);
+
+ // Split.
+ for (;;) {
+ const QPodPoint &u = m_parent->m_vertices.at(m_edges.at(leftmost->data).from);
+ const QPodPoint &v = m_parent->m_vertices.at(m_edges.at(leftmost->data).to);
+ Q_ASSERT(intersectionPoint.isOnLine(u, v));
+ const Split split = {vertex, leftmost->data, intersectionPoint.isAccurate()};
+ if (intersectionPoint.xOffset.numerator != 0 || intersectionPoint.yOffset.numerator != 0 || (intersectionPoint.upperLeft != u && intersectionPoint.upperLeft != v))
+ m_splits.add(split);
+ if (leftmost == rightmost)
+ break;
+ leftmost = m_edgeList.next(leftmost);
+ }
+}
+
+template <typename T>
+void QTriangulator<T>::ComplexToSimple::reorderEdgeListRange(QRBTree<int>::Node *leftmost, QRBTree<int>::Node *rightmost)
+{
+ Q_ASSERT(leftmost && rightmost);
+
+ QRBTree<int>::Node *storeLeftmost = leftmost;
+ QRBTree<int>::Node *storeRightmost = rightmost;
+
+ // Reorder.
+ while (leftmost != rightmost) {
+ Edge &left = m_edges.at(leftmost->data);
+ Edge &right = m_edges.at(rightmost->data);
+ qSwap(left.node, right.node);
+ qSwap(leftmost->data, rightmost->data);
+ leftmost = m_edgeList.next(leftmost);
+ if (leftmost == rightmost)
+ break;
+ rightmost = m_edgeList.previous(rightmost);
+ }
+
+ rightmost = m_edgeList.next(storeRightmost);
+ leftmost = m_edgeList.previous(storeLeftmost);
+ if (leftmost)
+ calculateIntersection(leftmost->data, storeLeftmost->data);
+ if (rightmost)
+ calculateIntersection(storeRightmost->data, rightmost->data);
+}
+
+template <typename T>
+void QTriangulator<T>::ComplexToSimple::sortEdgeList(const QPodPoint eventPoint)
+{
+ QIntersectionPoint eventPoint2 = QT_PREPEND_NAMESPACE(qIntersectionPoint)(eventPoint);
+ while (!m_topIntersection.isEmpty() && m_topIntersection.top().intersectionPoint < eventPoint2) {
+ Intersection intersection = m_topIntersection.pop();
+
+ QIntersectionPoint currentIntersectionPoint = intersection.intersectionPoint;
+ int currentVertex = intersection.vertex;
+
+ QRBTree<int>::Node *leftmost = m_edges.at(intersection.leftEdge).node;
+ QRBTree<int>::Node *rightmost = m_edges.at(intersection.rightEdge).node;
+
+ for (;;) {
+ QRBTree<int>::Node *previous = m_edgeList.previous(leftmost);
+ if (!previous)
+ break;
+ const Edge &edge = m_edges.at(previous->data);
+ const QPodPoint &u = m_parent->m_vertices.at((qint32)edge.from);
+ const QPodPoint &v = m_parent->m_vertices.at((qint32)edge.to);
+ if (!currentIntersectionPoint.isOnLine(u, v)) {
+ Q_ASSERT(!currentIntersectionPoint.isAccurate() || qCross(currentIntersectionPoint.upperLeft - u, v - u) != 0);
+ break;
+ }
+ leftmost = previous;
+ }
+
+ for (;;) {
+ QRBTree<int>::Node *next = m_edgeList.next(rightmost);
+ if (!next)
+ break;
+ const Edge &edge = m_edges.at(next->data);
+ const QPodPoint &u = m_parent->m_vertices.at((qint32)edge.from);
+ const QPodPoint &v = m_parent->m_vertices.at((qint32)edge.to);
+ if (!currentIntersectionPoint.isOnLine(u, v)) {
+ Q_ASSERT(!currentIntersectionPoint.isAccurate() || qCross(currentIntersectionPoint.upperLeft - u, v - u) != 0);
+ break;
+ }
+ rightmost = next;
+ }
+
+ Q_ASSERT(leftmost && rightmost);
+ splitEdgeListRange(leftmost, rightmost, currentVertex, currentIntersectionPoint);
+ reorderEdgeListRange(leftmost, rightmost);
+
+ while (!m_topIntersection.isEmpty() && m_topIntersection.top().intersectionPoint <= currentIntersectionPoint)
+ m_topIntersection.pop();
+
+#ifdef Q_TRIANGULATOR_DEBUG
+ DebugDialog dialog(this, intersection.vertex);
+ dialog.exec();
+#endif
+
+ }
+}
+
+template <typename T>
+void QTriangulator<T>::ComplexToSimple::fillPriorityQueue()
+{
+ m_events.reset();
+ m_events.reserve(m_edges.size() * 2);
+ for (int i = 0; i < m_edges.size(); ++i) {
+ Q_ASSERT(m_edges.at(i).previous == -1 && m_edges.at(i).next == -1);
+ Q_ASSERT(m_edges.at(i).node == 0);
+ Q_ASSERT(m_edges.at(i).pointingUp == m_edges.at(i).originallyPointingUp);
+ Q_ASSERT(m_edges.at(i).pointingUp == (m_parent->m_vertices.at(m_edges.at(i).to) < m_parent->m_vertices.at(m_edges.at(i).from)));
+ // Ignore zero-length edges.
+ if (m_parent->m_vertices.at(m_edges.at(i).to) != m_parent->m_vertices.at(m_edges.at(i).from)) {
+ QPodPoint upper = m_parent->m_vertices.at(m_edges.at(i).upper());
+ QPodPoint lower = m_parent->m_vertices.at(m_edges.at(i).lower());
+ Event upperEvent = {{upper.x, upper.y}, Event::Upper, i};
+ Event lowerEvent = {{lower.x, lower.y}, Event::Lower, i};
+ m_events.add(upperEvent);
+ m_events.add(lowerEvent);
+ }
+ }
+ //qSort(m_events.data(), m_events.data() + m_events.size());
+ sort(m_events.data(), m_events.size());
+}
+
+template <typename T>
+void QTriangulator<T>::ComplexToSimple::calculateIntersections()
+{
+ fillPriorityQueue();
+
+ Q_ASSERT(m_topIntersection.empty());
+ Q_ASSERT(m_edgeList.root == 0);
+
+ // Find all intersection points.
+ while (!m_events.isEmpty()) {
+ Event event = m_events.last();
+ sortEdgeList(event.point);
+
+ // Find all edges in the edge list that contain the current vertex and mark them to be split later.
+ QPair<QRBTree<int>::Node *, QRBTree<int>::Node *> range = bounds(event.point);
+ QRBTree<int>::Node *leftNode = range.first ? m_edgeList.previous(range.first) : 0;
+ int vertex = (event.type == Event::Upper ? m_edges.at(event.edge).upper() : m_edges.at(event.edge).lower());
+ QIntersectionPoint eventPoint = QT_PREPEND_NAMESPACE(qIntersectionPoint)(event.point);
+
+ if (range.first != 0) {
+ splitEdgeListRange(range.first, range.second, vertex, eventPoint);
+ reorderEdgeListRange(range.first, range.second);
+ }
+
+ // Handle the edges with start or end point in the current vertex.
+ while (!m_events.isEmpty() && m_events.last().point == event.point) {
+ event = m_events.last();
+ m_events.pop_back();
+ int i = event.edge;
+
+ if (m_edges.at(i).node) {
+ // Remove edge from edge list.
+ Q_ASSERT(event.type == Event::Lower);
+ QRBTree<int>::Node *left = m_edgeList.previous(m_edges.at(i).node);
+ QRBTree<int>::Node *right = m_edgeList.next(m_edges.at(i).node);
+ m_edgeList.deleteNode(m_edges.at(i).node);
+ if (!left || !right)
+ continue;
+ calculateIntersection(left->data, right->data);
+ } else {
+ // Insert edge into edge list.
+ Q_ASSERT(event.type == Event::Upper);
+ QRBTree<int>::Node *left = searchEdgeLeftOf(i, leftNode);
+ m_edgeList.attachAfter(left, m_edges.at(i).node = m_edgeList.newNode());
+ m_edges.at(i).node->data = i;
+ QRBTree<int>::Node *right = m_edgeList.next(m_edges.at(i).node);
+ if (left)
+ calculateIntersection(left->data, i);
+ if (right)
+ calculateIntersection(i, right->data);
+ }
+ }
+ while (!m_topIntersection.isEmpty() && m_topIntersection.top().intersectionPoint <= eventPoint)
+ m_topIntersection.pop();
+#ifdef Q_TRIANGULATOR_DEBUG
+ DebugDialog dialog(this, vertex);
+ dialog.exec();
+#endif
+ }
+ m_processedEdgePairs.clear();
+}
+
+// Split an edge into two pieces at the given point.
+// The upper piece is pushed to the end of the 'm_edges' vector.
+// The lower piece replaces the old edge.
+// Return the edge whose 'from' is 'pointIndex'.
+template <typename T>
+int QTriangulator<T>::ComplexToSimple::splitEdge(int splitIndex)
+{
+ const Split &split = m_splits.at(splitIndex);
+ Edge &lowerEdge = m_edges.at(split.edge);
+ Q_ASSERT(lowerEdge.node == 0);
+ Q_ASSERT(lowerEdge.previous == -1 && lowerEdge.next == -1);
+
+ if (lowerEdge.from == split.vertex)
+ return split.edge;
+ if (lowerEdge.to == split.vertex)
+ return lowerEdge.next;
+
+ // Check that angle >= 90 degrees.
+ //Q_ASSERT(qDot(m_points.at(m_edges.at(edgeIndex).from) - m_points.at(pointIndex),
+ // m_points.at(m_edges.at(edgeIndex).to) - m_points.at(pointIndex)) <= 0);
+
+ Edge upperEdge = lowerEdge;
+ upperEdge.mayIntersect |= !split.accurate; // The edge may have been split before at an inaccurate split point.
+ lowerEdge.mayIntersect = !split.accurate;
+ if (lowerEdge.pointingUp) {
+ lowerEdge.to = upperEdge.from = split.vertex;
+ m_edges.add(upperEdge);
+ return m_edges.size() - 1;
+ } else {
+ lowerEdge.from = upperEdge.to = split.vertex;
+ m_edges.add(upperEdge);
+ return split.edge;
+ }
+}
+
+template <typename T>
+bool QTriangulator<T>::ComplexToSimple::splitEdgesAtIntersections()
+{
+ for (int i = 0; i < m_edges.size(); ++i)
+ m_edges.at(i).mayIntersect = false;
+ bool checkForNewIntersections = false;
+ for (int i = 0; i < m_splits.size(); ++i) {
+ splitEdge(i);
+ checkForNewIntersections |= !m_splits.at(i).accurate;
+ }
+ for (int i = 0; i < m_edges.size(); ++i) {
+ m_edges.at(i).originallyPointingUp = m_edges.at(i).pointingUp =
+ m_parent->m_vertices.at(m_edges.at(i).to) < m_parent->m_vertices.at(m_edges.at(i).from);
+ }
+ m_splits.reset();
+ return checkForNewIntersections;
+}
+
+template <typename T>
+void QTriangulator<T>::ComplexToSimple::insertEdgeIntoVectorIfWanted(ShortArray &orderedEdges, int i)
+{
+ // Edges with zero length should not reach this part.
+ Q_ASSERT(m_parent->m_vertices.at(m_edges.at(i).from) != m_parent->m_vertices.at(m_edges.at(i).to));
+
+ // Skip edges with unwanted winding number.
+ int windingNumber = m_edges.at(i).winding;
+ if (m_edges.at(i).originallyPointingUp)
+ ++windingNumber;
+
+ // Make sure exactly one fill rule is specified.
+ Q_ASSERT(((m_parent->m_hint & QVectorPath::WindingFill) != 0) != ((m_parent->m_hint & QVectorPath::OddEvenFill) != 0));
+
+ if ((m_parent->m_hint & QVectorPath::WindingFill) && windingNumber != 0 && windingNumber != 1)
+ return;
+
+ // Skip cancelling edges.
+ if (!orderedEdges.isEmpty()) {
+ int j = orderedEdges[orderedEdges.size() - 1];
+ // If the last edge is already connected in one end, it should not be cancelled.
+ if (m_edges.at(j).next == -1 && m_edges.at(j).previous == -1
+ && (m_parent->m_vertices.at(m_edges.at(i).from) == m_parent->m_vertices.at(m_edges.at(j).to))
+ && (m_parent->m_vertices.at(m_edges.at(i).to) == m_parent->m_vertices.at(m_edges.at(j).from))) {
+ orderedEdges.removeLast();
+ return;
+ }
+ }
+ orderedEdges.append(i);
+}
+
+template <typename T>
+void QTriangulator<T>::ComplexToSimple::removeUnwantedEdgesAndConnect()
+{
+ Q_ASSERT(m_edgeList.root == 0);
+ // Initialize priority queue.
+ fillPriorityQueue();
+
+ ShortArray orderedEdges;
+
+ while (!m_events.isEmpty()) {
+ Event event = m_events.last();
+ int edgeIndex = event.edge;
+
+ // Check that all the edges in the list crosses the current scanline
+ //if (m_edgeList.root) {
+ // for (QRBTree<int>::Node *node = m_edgeList.front(m_edgeList.root); node; node = m_edgeList.next(node)) {
+ // Q_ASSERT(event.point <= m_points.at(m_edges.at(node->data).lower()));
+ // }
+ //}
+
+ orderedEdges.clear();
+ QPair<QRBTree<int>::Node *, QRBTree<int>::Node *> b = outerBounds(event.point);
+ if (m_edgeList.root) {
+ QRBTree<int>::Node *current = (b.first ? m_edgeList.next(b.first) : m_edgeList.front(m_edgeList.root));
+ // Process edges that are going to be removed from the edge list at the current event point.
+ while (current != b.second) {
+ Q_ASSERT(current);
+ Q_ASSERT(m_edges.at(current->data).node == current);
+ Q_ASSERT(QT_PREPEND_NAMESPACE(qIntersectionPoint)(event.point).isOnLine(m_parent->m_vertices.at(m_edges.at(current->data).from), m_parent->m_vertices.at(m_edges.at(current->data).to)));
+ Q_ASSERT(m_parent->m_vertices.at(m_edges.at(current->data).from) == event.point || m_parent->m_vertices.at(m_edges.at(current->data).to) == event.point);
+ insertEdgeIntoVectorIfWanted(orderedEdges, current->data);
+ current = m_edgeList.next(current);
+ }
+ }
+
+ // Remove edges above the event point, insert edges below the event point.
+ do {
+ event = m_events.last();
+ m_events.pop_back();
+ edgeIndex = event.edge;
+
+ // Edges with zero length should not reach this part.
+ Q_ASSERT(m_parent->m_vertices.at(m_edges.at(edgeIndex).from) != m_parent->m_vertices.at(m_edges.at(edgeIndex).to));
+
+ if (m_edges.at(edgeIndex).node) {
+ Q_ASSERT(event.type == Event::Lower);
+ Q_ASSERT(event.point == m_parent->m_vertices.at(m_edges.at(event.edge).lower()));
+ m_edgeList.deleteNode(m_edges.at(edgeIndex).node);
+ } else {
+ Q_ASSERT(event.type == Event::Upper);
+ Q_ASSERT(event.point == m_parent->m_vertices.at(m_edges.at(event.edge).upper()));
+ QRBTree<int>::Node *left = searchEdgeLeftOf(edgeIndex, b.first);
+ m_edgeList.attachAfter(left, m_edges.at(edgeIndex).node = m_edgeList.newNode());
+ m_edges.at(edgeIndex).node->data = edgeIndex;
+ }
+ } while (!m_events.isEmpty() && m_events.last().point == event.point);
+
+ if (m_edgeList.root) {
+ QRBTree<int>::Node *current = (b.first ? m_edgeList.next(b.first) : m_edgeList.front(m_edgeList.root));
+
+ // Calculate winding number and turn counter-clockwise.
+ int currentWindingNumber = (b.first ? m_edges.at(b.first->data).winding : 0);
+ while (current != b.second) {
+ Q_ASSERT(current);
+ //Q_ASSERT(b.second == 0 || m_edgeList.order(current, b.second) < 0);
+ int i = current->data;
+ Q_ASSERT(m_edges.at(i).node == current);
+
+ // Winding number.
+ int ccwWindingNumber = m_edges.at(i).winding = currentWindingNumber;
+ if (m_edges.at(i).originallyPointingUp) {
+ --m_edges.at(i).winding;
+ } else {
+ ++m_edges.at(i).winding;
+ ++ccwWindingNumber;
+ }
+ currentWindingNumber = m_edges.at(i).winding;
+
+ // Turn counter-clockwise.
+ if ((ccwWindingNumber & 1) == 0) {
+ Q_ASSERT(m_edges.at(i).previous == -1 && m_edges.at(i).next == -1);
+ qSwap(m_edges.at(i).from, m_edges.at(i).to);
+ m_edges.at(i).pointingUp = !m_edges.at(i).pointingUp;
+ }
+
+ current = m_edgeList.next(current);
+ }
+
+ // Process edges that were inserted into the edge list at the current event point.
+ current = (b.second ? m_edgeList.previous(b.second) : m_edgeList.back(m_edgeList.root));
+ while (current != b.first) {
+ Q_ASSERT(current);
+ Q_ASSERT(m_edges.at(current->data).node == current);
+ insertEdgeIntoVectorIfWanted(orderedEdges, current->data);
+ current = m_edgeList.previous(current);
+ }
+ }
+ if (orderedEdges.isEmpty())
+ continue;
+
+ Q_ASSERT((orderedEdges.size() & 1) == 0);
+
+ // Connect edges.
+ // First make sure the first edge point towards the current point.
+ int i;
+ if (m_parent->m_vertices.at(m_edges.at(orderedEdges[0]).from) == event.point) {
+ i = 1;
+ int copy = orderedEdges[0]; // Make copy in case the append() will cause a reallocation.
+ orderedEdges.append(copy);
+ } else {
+ Q_ASSERT(m_parent->m_vertices.at(m_edges.at(orderedEdges[0]).to) == event.point);
+ i = 0;
+ }
+
+ // Remove references to duplicate points. First find the point with lowest index.
+ int pointIndex = INT_MAX;
+ for (int j = i; j < orderedEdges.size(); j += 2) {
+ Q_ASSERT(j + 1 < orderedEdges.size());
+ Q_ASSERT(m_parent->m_vertices.at(m_edges.at(orderedEdges[j]).to) == event.point);
+ Q_ASSERT(m_parent->m_vertices.at(m_edges.at(orderedEdges[j + 1]).from) == event.point);
+ if (m_edges.at(orderedEdges[j]).to < pointIndex)
+ pointIndex = m_edges.at(orderedEdges[j]).to;
+ if (m_edges.at(orderedEdges[j + 1]).from < pointIndex)
+ pointIndex = m_edges.at(orderedEdges[j + 1]).from;
+ }
+
+ for (; i < orderedEdges.size(); i += 2) {
+ // Remove references to duplicate points by making all edges reference one common point.
+ m_edges.at(orderedEdges[i]).to = m_edges.at(orderedEdges[i + 1]).from = pointIndex;
+
+ Q_ASSERT(m_edges.at(orderedEdges[i]).pointingUp || m_edges.at(orderedEdges[i]).previous != -1);
+ Q_ASSERT(!m_edges.at(orderedEdges[i + 1]).pointingUp || m_edges.at(orderedEdges[i + 1]).next != -1);
+
+ m_edges.at(orderedEdges[i]).next = orderedEdges[i + 1];
+ m_edges.at(orderedEdges[i + 1]).previous = orderedEdges[i];
+ }
+ } // end while
+}
+
+template <typename T>
+void QTriangulator<T>::ComplexToSimple::removeUnusedPoints() {
+ QBitArray used(m_parent->m_vertices.size(), false);
+ for (int i = 0; i < m_edges.size(); ++i) {
+ Q_ASSERT((m_edges.at(i).previous == -1) == (m_edges.at(i).next == -1));
+ if (m_edges.at(i).next != -1)
+ used.setBit(m_edges.at(i).from);
+ }
+ QDataBuffer<quint32> newMapping(m_parent->m_vertices.size());
+ newMapping.resize(m_parent->m_vertices.size());
+ int count = 0;
+ for (int i = 0; i < m_parent->m_vertices.size(); ++i) {
+ if (used.at(i)) {
+ m_parent->m_vertices.at(count) = m_parent->m_vertices.at(i);
+ newMapping.at(i) = count;
+ ++count;
+ }
+ }
+ m_parent->m_vertices.resize(count);
+ for (int i = 0; i < m_edges.size(); ++i) {
+ m_edges.at(i).from = newMapping.at(m_edges.at(i).from);
+ m_edges.at(i).to = newMapping.at(m_edges.at(i).to);
+ }
+}
+
+template <typename T>
+bool QTriangulator<T>::ComplexToSimple::CompareEdges::operator () (int i, int j) const
+{
+ int cmp = comparePoints(m_parent->m_parent->m_vertices.at(m_parent->m_edges.at(i).from),
+ m_parent->m_parent->m_vertices.at(m_parent->m_edges.at(j).from));
+ if (cmp == 0) {
+ cmp = comparePoints(m_parent->m_parent->m_vertices.at(m_parent->m_edges.at(i).to),
+ m_parent->m_parent->m_vertices.at(m_parent->m_edges.at(j).to));
+ }
+ return cmp > 0;
+}
+
+template <typename T>
+inline bool QTriangulator<T>::ComplexToSimple::Event::operator < (const Event &other) const
+{
+ if (point == other.point)
+ return type < other.type; // 'Lower' has higher priority than 'Upper'.
+ return other.point < point;
+}
+
+//============================================================================//
+// QTriangulator::ComplexToSimple::DebugDialog //
+//============================================================================//
+
+#ifdef Q_TRIANGULATOR_DEBUG
+template <typename T>
+QTriangulator<T>::ComplexToSimple::DebugDialog::DebugDialog(ComplexToSimple *parent, int currentVertex)
+ : m_parent(parent), m_vertex(currentVertex)
+{
+ QDataBuffer<QPodPoint> &vertices = m_parent->m_parent->m_vertices;
+ if (vertices.isEmpty())
+ return;
+
+ int minX, maxX, minY, maxY;
+ minX = maxX = vertices.at(0).x;
+ minY = maxY = vertices.at(0).y;
+ for (int i = 1; i < vertices.size(); ++i) {
+ minX = qMin(minX, vertices.at(i).x);
+ maxX = qMax(maxX, vertices.at(i).x);
+ minY = qMin(minY, vertices.at(i).y);
+ maxY = qMax(maxY, vertices.at(i).y);
+ }
+ int w = maxX - minX;
+ int h = maxY - minY;
+ qreal border = qMin(w, h) / 10.0;
+ m_window = QRectF(minX - border, minY - border, (maxX - minX + 2 * border), (maxY - minY + 2 * border));
+}
+
+template <typename T>
+void QTriangulator<T>::ComplexToSimple::DebugDialog::paintEvent(QPaintEvent *)
+{
+ QPainter p(this);
+ p.setRenderHint(QPainter::Antialiasing, true);
+ p.fillRect(rect(), Qt::black);
+ QDataBuffer<QPodPoint> &vertices = m_parent->m_parent->m_vertices;
+ if (vertices.isEmpty())
+ return;
+
+ qreal halfPointSize = qMin(m_window.width(), m_window.height()) / 300.0;
+ p.setWindow(m_window.toRect());
+
+ p.setPen(Qt::white);
+
+ QDataBuffer<Edge> &edges = m_parent->m_edges;
+ for (int i = 0; i < edges.size(); ++i) {
+ QPodPoint u = vertices.at(edges.at(i).from);
+ QPodPoint v = vertices.at(edges.at(i).to);
+ p.drawLine(u.x, u.y, v.x, v.y);
+ }
+
+ for (int i = 0; i < vertices.size(); ++i) {
+ QPodPoint q = vertices.at(i);
+ p.fillRect(QRectF(q.x - halfPointSize, q.y - halfPointSize, 2 * halfPointSize, 2 * halfPointSize), Qt::red);
+ }
+
+ Qt::GlobalColor colors[6] = {Qt::red, Qt::green, Qt::blue, Qt::cyan, Qt::magenta, Qt::yellow};
+ p.setOpacity(0.5);
+ int count = 0;
+ if (m_parent->m_edgeList.root) {
+ QRBTree<int>::Node *current = m_parent->m_edgeList.front(m_parent->m_edgeList.root);
+ while (current) {
+ p.setPen(colors[count++ % 6]);
+ QPodPoint u = vertices.at(edges.at(current->data).from);
+ QPodPoint v = vertices.at(edges.at(current->data).to);
+ p.drawLine(u.x, u.y, v.x, v.y);
+ current = m_parent->m_edgeList.next(current);
+ }
+ }
+
+ p.setOpacity(1.0);
+ QPodPoint q = vertices.at(m_vertex);
+ p.fillRect(QRectF(q.x - halfPointSize, q.y - halfPointSize, 2 * halfPointSize, 2 * halfPointSize), Qt::green);
+
+ p.setPen(Qt::gray);
+ QDataBuffer<Split> &splits = m_parent->m_splits;
+ for (int i = 0; i < splits.size(); ++i) {
+ QPodPoint q = vertices.at(splits.at(i).vertex);
+ QPodPoint u = vertices.at(edges.at(splits.at(i).edge).from) - q;
+ QPodPoint v = vertices.at(edges.at(splits.at(i).edge).to) - q;
+ qreal uLen = sqrt(qreal(qDot(u, u)));
+ qreal vLen = sqrt(qreal(qDot(v, v)));
+ if (uLen) {
+ u.x *= 2 * halfPointSize / uLen;
+ u.y *= 2 * halfPointSize / uLen;
+ }
+ if (vLen) {
+ v.x *= 2 * halfPointSize / vLen;
+ v.y *= 2 * halfPointSize / vLen;
+ }
+ u += q;
+ v += q;
+ p.drawLine(u.x, u.y, v.x, v.y);
+ }
+}
+
+template <typename T>
+void QTriangulator<T>::ComplexToSimple::DebugDialog::wheelEvent(QWheelEvent *event)
+{
+ qreal scale = exp(-0.001 * event->delta());
+ QPointF center = m_window.center();
+ QPointF delta = scale * (m_window.bottomRight() - center);
+ m_window = QRectF(center - delta, center + delta);
+ event->accept();
+ update();
+}
+
+template <typename T>
+void QTriangulator<T>::ComplexToSimple::DebugDialog::mouseMoveEvent(QMouseEvent *event)
+{
+ if (event->buttons() & Qt::LeftButton) {
+ QPointF delta = event->pos() - m_lastMousePos;
+ delta.setX(delta.x() * m_window.width() / width());
+ delta.setY(delta.y() * m_window.height() / height());
+ m_window.translate(-delta.x(), -delta.y());
+ m_lastMousePos = event->pos();
+ event->accept();
+ update();
+ }
+}
+
+template <typename T>
+void QTriangulator<T>::ComplexToSimple::DebugDialog::mousePressEvent(QMouseEvent *event)
+{
+ if (event->button() == Qt::LeftButton)
+ m_lastMousePos = event->pos();
+ event->accept();
+}
+
+
+#endif
+
+//============================================================================//
+// QTriangulator::SimpleToMonotone //
+//============================================================================//
+template <typename T>
+void QTriangulator<T>::SimpleToMonotone::decompose()
+{
+ setupDataStructures();
+ removeZeroLengthEdges();
+ monotoneDecomposition();
+
+ m_parent->m_indices.clear();
+ QBitArray processed(m_edges.size(), false);
+ for (int first = 0; first < m_edges.size(); ++first) {
+ if (processed.at(first))
+ continue;
+ int i = first;
+ do {
+ Q_ASSERT(!processed.at(i));
+ Q_ASSERT(m_edges.at(m_edges.at(i).next).previous == i);
+ m_parent->m_indices.push_back(m_edges.at(i).from);
+ processed.setBit(i);
+ i = m_edges.at(i).next;
+ } while (i != first);
+ if (m_parent->m_indices.size() > 0 && m_parent->m_indices.back() != T(-1)) // Q_TRIANGULATE_END_OF_POLYGON
+ m_parent->m_indices.push_back(T(-1)); // Q_TRIANGULATE_END_OF_POLYGON
+ }
+}
+
+template <typename T>
+void QTriangulator<T>::SimpleToMonotone::setupDataStructures()
+{
+ int i = 0;
+ Edge e;
+ e.node = 0;
+ e.twin = -1;
+
+ while (i + 3 <= m_parent->m_indices.size()) {
+ int start = m_edges.size();
+
+ do {
+ e.from = m_parent->m_indices.at(i);
+ e.type = RegularVertex;
+ e.next = m_edges.size() + 1;
+ e.previous = m_edges.size() - 1;
+ m_edges.add(e);
+ ++i;
+ Q_ASSERT(i < m_parent->m_indices.size());
+ } while (m_parent->m_indices.at(i) != T(-1)); // Q_TRIANGULATE_END_OF_POLYGON
+
+ m_edges.last().next = start;
+ m_edges.at(start).previous = m_edges.size() - 1;
+ ++i; // Skip Q_TRIANGULATE_END_OF_POLYGON.
+ }
+
+ for (i = 0; i < m_edges.size(); ++i) {
+ m_edges.at(i).to = m_edges.at(m_edges.at(i).next).from;
+ m_edges.at(i).pointingUp = m_parent->m_vertices.at(m_edges.at(i).to) < m_parent->m_vertices.at(m_edges.at(i).from);
+ m_edges.at(i).helper = -1; // Not initialized here.
+ }
+}
+
+template <typename T>
+void QTriangulator<T>::SimpleToMonotone::removeZeroLengthEdges()
+{
+ for (int i = 0; i < m_edges.size(); ++i) {
+ if (m_parent->m_vertices.at(m_edges.at(i).from) == m_parent->m_vertices.at(m_edges.at(i).to)) {
+ m_edges.at(m_edges.at(i).previous).next = m_edges.at(i).next;
+ m_edges.at(m_edges.at(i).next).previous = m_edges.at(i).previous;
+ m_edges.at(m_edges.at(i).next).from = m_edges.at(i).from;
+ m_edges.at(i).next = -1; // Mark as removed.
+ }
+ }
+
+ QDataBuffer<int> newMapping(m_edges.size());
+ newMapping.resize(m_edges.size());
+ int count = 0;
+ for (int i = 0; i < m_edges.size(); ++i) {
+ if (m_edges.at(i).next != -1) {
+ m_edges.at(count) = m_edges.at(i);
+ newMapping.at(i) = count;
+ ++count;
+ }
+ }
+ m_edges.resize(count);
+ for (int i = 0; i < m_edges.size(); ++i) {
+ m_edges.at(i).next = newMapping.at(m_edges.at(i).next);
+ m_edges.at(i).previous = newMapping.at(m_edges.at(i).previous);
+ }
+}
+
+template <typename T>
+void QTriangulator<T>::SimpleToMonotone::fillPriorityQueue()
+{
+ m_upperVertex.reset();
+ m_upperVertex.reserve(m_edges.size());
+ for (int i = 0; i < m_edges.size(); ++i)
+ m_upperVertex.add(i);
+ CompareVertices cmp(this);
+ //qSort(m_upperVertex.data(), m_upperVertex.data() + m_upperVertex.size(), cmp);
+ sort(m_upperVertex.data(), m_upperVertex.size(), cmp);
+ //for (int i = 1; i < m_upperVertex.size(); ++i) {
+ // Q_ASSERT(!cmp(m_upperVertex.at(i), m_upperVertex.at(i - 1)));
+ //}
+}
+
+template <typename T>
+bool QTriangulator<T>::SimpleToMonotone::edgeIsLeftOfEdge(int leftEdgeIndex, int rightEdgeIndex) const
+{
+ const Edge &leftEdge = m_edges.at(leftEdgeIndex);
+ const Edge &rightEdge = m_edges.at(rightEdgeIndex);
+ const QPodPoint &u = m_parent->m_vertices.at(rightEdge.upper());
+ const QPodPoint &l = m_parent->m_vertices.at(rightEdge.lower());
+ qint64 d = QT_PREPEND_NAMESPACE(qPointDistanceFromLine)(m_parent->m_vertices.at(leftEdge.upper()), l, u);
+ // d < 0: left, d > 0: right, d == 0: on top
+ if (d == 0)
+ d = QT_PREPEND_NAMESPACE(qPointDistanceFromLine)(m_parent->m_vertices.at(leftEdge.lower()), l, u);
+ return d < 0;
+}
+
+// Returns the rightmost edge not to the right of the given edge.
+template <typename T>
+QRBTree<int>::Node *QTriangulator<T>::SimpleToMonotone::searchEdgeLeftOfEdge(int edgeIndex) const
+{
+ QRBTree<int>::Node *current = m_edgeList.root;
+ QRBTree<int>::Node *result = 0;
+ while (current) {
+ if (edgeIsLeftOfEdge(edgeIndex, current->data)) {
+ current = current->left;
+ } else {
+ result = current;
+ current = current->right;
+ }
+ }
+ return result;
+}
+
+// Returns the rightmost edge left of the given point.
+template <typename T>
+QRBTree<int>::Node *QTriangulator<T>::SimpleToMonotone::searchEdgeLeftOfPoint(int pointIndex) const
+{
+ QRBTree<int>::Node *current = m_edgeList.root;
+ QRBTree<int>::Node *result = 0;
+ while (current) {
+ const QPodPoint &p1 = m_parent->m_vertices.at(m_edges.at(current->data).lower());
+ const QPodPoint &p2 = m_parent->m_vertices.at(m_edges.at(current->data).upper());
+ qint64 d = QT_PREPEND_NAMESPACE(qPointDistanceFromLine)(m_parent->m_vertices.at(pointIndex), p1, p2);
+ if (d <= 0) {
+ current = current->left;
+ } else {
+ result = current;
+ current = current->right;
+ }
+ }
+ return result;
+}
+
+template <typename T>
+void QTriangulator<T>::SimpleToMonotone::classifyVertex(int i)
+{
+ Edge &e2 = m_edges.at(i);
+ const Edge &e1 = m_edges.at(e2.previous);
+
+ bool startOrSplit = (e1.pointingUp && !e2.pointingUp);
+ bool endOrMerge = (!e1.pointingUp && e2.pointingUp);
+
+ const QPodPoint &p1 = m_parent->m_vertices.at(e1.from);
+ const QPodPoint &p2 = m_parent->m_vertices.at(e2.from);
+ const QPodPoint &p3 = m_parent->m_vertices.at(e2.to);
+ qint64 d = QT_PREPEND_NAMESPACE(qPointDistanceFromLine)(p1, p2, p3);
+ Q_ASSERT(d != 0 || (!startOrSplit && !endOrMerge));
+
+ e2.type = RegularVertex;
+
+ if (m_clockwiseOrder) {
+ if (startOrSplit)
+ e2.type = (d < 0 ? SplitVertex : StartVertex);
+ else if (endOrMerge)
+ e2.type = (d < 0 ? MergeVertex : EndVertex);
+ } else {
+ if (startOrSplit)
+ e2.type = (d > 0 ? SplitVertex : StartVertex);
+ else if (endOrMerge)
+ e2.type = (d > 0 ? MergeVertex : EndVertex);
+ }
+}
+
+template <typename T>
+void QTriangulator<T>::SimpleToMonotone::classifyVertices()
+{
+ for (int i = 0; i < m_edges.size(); ++i)
+ classifyVertex(i);
+}
+
+template <typename T>
+bool QTriangulator<T>::SimpleToMonotone::pointIsInSector(const QPodPoint &p, const QPodPoint &v1, const QPodPoint &v2, const QPodPoint &v3)
+{
+ bool leftOfPreviousEdge = !qPointIsLeftOfLine(p, v2, v1);
+ bool leftOfNextEdge = !qPointIsLeftOfLine(p, v3, v2);
+
+ if (qPointIsLeftOfLine(v1, v2, v3))
+ return leftOfPreviousEdge && leftOfNextEdge;
+ else
+ return leftOfPreviousEdge || leftOfNextEdge;
+}
+
+template <typename T>
+bool QTriangulator<T>::SimpleToMonotone::pointIsInSector(int vertex, int sector)
+{
+ const QPodPoint &center = m_parent->m_vertices.at(m_edges.at(sector).from);
+ // Handle degenerate edges.
+ while (m_parent->m_vertices.at(m_edges.at(vertex).from) == center)
+ vertex = m_edges.at(vertex).next;
+ int next = m_edges.at(sector).next;
+ while (m_parent->m_vertices.at(m_edges.at(next).from) == center)
+ next = m_edges.at(next).next;
+ int previous = m_edges.at(sector).previous;
+ while (m_parent->m_vertices.at(m_edges.at(previous).from) == center)
+ previous = m_edges.at(previous).previous;
+
+ const QPodPoint &p = m_parent->m_vertices.at(m_edges.at(vertex).from);
+ const QPodPoint &v1 = m_parent->m_vertices.at(m_edges.at(previous).from);
+ const QPodPoint &v3 = m_parent->m_vertices.at(m_edges.at(next).from);
+ if (m_clockwiseOrder)
+ return pointIsInSector(p, v3, center, v1);
+ else
+ return pointIsInSector(p, v1, center, v3);
+}
+
+template <typename T>
+int QTriangulator<T>::SimpleToMonotone::findSector(int edge, int vertex)
+{
+ while (!pointIsInSector(vertex, edge)) {
+ edge = m_edges.at(m_edges.at(edge).previous).twin;
+ Q_ASSERT(edge != -1);
+ }
+ return edge;
+}
+
+template <typename T>
+void QTriangulator<T>::SimpleToMonotone::createDiagonal(int lower, int upper)
+{
+ lower = findSector(lower, upper);
+ upper = findSector(upper, lower);
+
+ int prevLower = m_edges.at(lower).previous;
+ int prevUpper = m_edges.at(upper).previous;
+
+ Edge e;
+
+ e.twin = m_edges.size() + 1;
+ e.next = upper;
+ e.previous = prevLower;
+ e.from = m_edges.at(lower).from;
+ e.to = m_edges.at(upper).from;
+ m_edges.at(upper).previous = m_edges.at(prevLower).next = int(m_edges.size());
+ m_edges.add(e);
+
+ e.twin = m_edges.size() - 1;
+ e.next = lower;
+ e.previous = prevUpper;
+ e.from = m_edges.at(upper).from;
+ e.to = m_edges.at(lower).from;
+ m_edges.at(lower).previous = m_edges.at(prevUpper).next = int(m_edges.size());
+ m_edges.add(e);
+}
+
+template <typename T>
+void QTriangulator<T>::SimpleToMonotone::monotoneDecomposition()
+{
+ if (m_edges.isEmpty())
+ return;
+
+ Q_ASSERT(!m_edgeList.root);
+ QDataBuffer<QPair<int, int> > diagonals(m_upperVertex.size());
+
+ int i = 0;
+ for (int index = 1; index < m_edges.size(); ++index) {
+ if (m_parent->m_vertices.at(m_edges.at(index).from) < m_parent->m_vertices.at(m_edges.at(i).from))
+ i = index;
+ }
+ Q_ASSERT(i < m_edges.size());
+ int j = m_edges.at(i).previous;
+ Q_ASSERT(j < m_edges.size());
+ m_clockwiseOrder = qPointIsLeftOfLine(m_parent->m_vertices.at((quint32)m_edges.at(i).from),
+ m_parent->m_vertices.at((quint32)m_edges.at(j).from), m_parent->m_vertices.at((quint32)m_edges.at(i).to));
+
+ classifyVertices();
+ fillPriorityQueue();
+
+ // debug: set helpers explicitly (shouldn't be necessary)
+ //for (int i = 0; i < m_edges.size(); ++i)
+ // m_edges.at(i).helper = m_edges.at(i).upper();
+
+ while (!m_upperVertex.isEmpty()) {
+ i = m_upperVertex.last();
+ Q_ASSERT(i < m_edges.size());
+ m_upperVertex.pop_back();
+ j = m_edges.at(i).previous;
+ Q_ASSERT(j < m_edges.size());
+
+ QRBTree<int>::Node *leftEdgeNode = 0;
+
+ switch (m_edges.at(i).type) {
+ case RegularVertex:
+ // If polygon interior is to the right of the vertex...
+ if (m_edges.at(i).pointingUp == m_clockwiseOrder) {
+ if (m_edges.at(i).node) {
+ Q_ASSERT(!m_edges.at(j).node);
+ if (m_edges.at(m_edges.at(i).helper).type == MergeVertex)
+ diagonals.add(QPair<int, int>(i, m_edges.at(i).helper));
+ m_edges.at(j).node = m_edges.at(i).node;
+ m_edges.at(i).node = 0;
+ m_edges.at(j).node->data = j;
+ m_edges.at(j).helper = i;
+ } else if (m_edges.at(j).node) {
+ Q_ASSERT(!m_edges.at(i).node);
+ if (m_edges.at(m_edges.at(j).helper).type == MergeVertex)
+ diagonals.add(QPair<int, int>(i, m_edges.at(j).helper));
+ m_edges.at(i).node = m_edges.at(j).node;
+ m_edges.at(j).node = 0;
+ m_edges.at(i).node->data = i;
+ m_edges.at(i).helper = i;
+ } else {
+ qWarning("Inconsistent polygon. (#1)");
+ }
+ } else {
+ leftEdgeNode = searchEdgeLeftOfPoint(m_edges.at(i).from);
+ if (leftEdgeNode) {
+ if (m_edges.at(m_edges.at(leftEdgeNode->data).helper).type == MergeVertex)
+ diagonals.add(QPair<int, int>(i, m_edges.at(leftEdgeNode->data).helper));
+ m_edges.at(leftEdgeNode->data).helper = i;
+ } else {
+ qWarning("Inconsistent polygon. (#2)");
+ }
+ }
+ break;
+ case SplitVertex:
+ leftEdgeNode = searchEdgeLeftOfPoint(m_edges.at(i).from);
+ if (leftEdgeNode) {
+ diagonals.add(QPair<int, int>(i, m_edges.at(leftEdgeNode->data).helper));
+ m_edges.at(leftEdgeNode->data).helper = i;
+ } else {
+ qWarning("Inconsistent polygon. (#3)");
+ }
+ // Fall through.
+ case StartVertex:
+ if (m_clockwiseOrder) {
+ leftEdgeNode = searchEdgeLeftOfEdge(j);
+ QRBTree<int>::Node *node = m_edgeList.newNode();
+ node->data = j;
+ m_edges.at(j).node = node;
+ m_edges.at(j).helper = i;
+ m_edgeList.attachAfter(leftEdgeNode, node);
+ Q_ASSERT(m_edgeList.validate());
+ } else {
+ leftEdgeNode = searchEdgeLeftOfEdge(i);
+ QRBTree<int>::Node *node = m_edgeList.newNode();
+ node->data = i;
+ m_edges.at(i).node = node;
+ m_edges.at(i).helper = i;
+ m_edgeList.attachAfter(leftEdgeNode, node);
+ Q_ASSERT(m_edgeList.validate());
+ }
+ break;
+ case MergeVertex:
+ leftEdgeNode = searchEdgeLeftOfPoint(m_edges.at(i).from);
+ if (leftEdgeNode) {
+ if (m_edges.at(m_edges.at(leftEdgeNode->data).helper).type == MergeVertex)
+ diagonals.add(QPair<int, int>(i, m_edges.at(leftEdgeNode->data).helper));
+ m_edges.at(leftEdgeNode->data).helper = i;
+ } else {
+ qWarning("Inconsistent polygon. (#4)");
+ }
+ // Fall through.
+ case EndVertex:
+ if (m_clockwiseOrder) {
+ if (m_edges.at(m_edges.at(i).helper).type == MergeVertex)
+ diagonals.add(QPair<int, int>(i, m_edges.at(i).helper));
+ if (m_edges.at(i).node) {
+ m_edgeList.deleteNode(m_edges.at(i).node);
+ Q_ASSERT(m_edgeList.validate());
+ } else {
+ qWarning("Inconsistent polygon. (#5)");
+ }
+ } else {
+ if (m_edges.at(m_edges.at(j).helper).type == MergeVertex)
+ diagonals.add(QPair<int, int>(i, m_edges.at(j).helper));
+ if (m_edges.at(j).node) {
+ m_edgeList.deleteNode(m_edges.at(j).node);
+ Q_ASSERT(m_edgeList.validate());
+ } else {
+ qWarning("Inconsistent polygon. (#6)");
+ }
+ }
+ break;
+ }
+ }
+
+ for (int i = 0; i < diagonals.size(); ++i)
+ createDiagonal(diagonals.at(i).first, diagonals.at(i).second);
+}
+
+template <typename T>
+bool QTriangulator<T>::SimpleToMonotone::CompareVertices::operator () (int i, int j) const
+{
+ if (m_parent->m_edges.at(i).from == m_parent->m_edges.at(j).from)
+ return m_parent->m_edges.at(i).type > m_parent->m_edges.at(j).type;
+ return m_parent->m_parent->m_vertices.at(m_parent->m_edges.at(i).from) >
+ m_parent->m_parent->m_vertices.at(m_parent->m_edges.at(j).from);
+}
+
+//============================================================================//
+// QTriangulator::MonotoneToTriangles //
+//============================================================================//
+template <typename T>
+void QTriangulator<T>::MonotoneToTriangles::decompose()
+{
+ QVector<T> result;
+ QDataBuffer<int> stack(m_parent->m_indices.size());
+ m_first = 0;
+ // Require at least three more indices.
+ while (m_first + 3 <= m_parent->m_indices.size()) {
+ m_length = 0;
+ while (m_parent->m_indices.at(m_first + m_length) != T(-1)) { // Q_TRIANGULATE_END_OF_POLYGON
+ ++m_length;
+ Q_ASSERT(m_first + m_length < m_parent->m_indices.size());
+ }
+ if (m_length < 3) {
+ m_first += m_length + 1;
+ continue;
+ }
+
+ int minimum = 0;
+ while (less(next(minimum), minimum))
+ minimum = next(minimum);
+ while (less(previous(minimum), minimum))
+ minimum = previous(minimum);
+
+ stack.reset();
+ stack.add(minimum);
+ int left = previous(minimum);
+ int right = next(minimum);
+ bool stackIsOnLeftSide;
+ bool clockwiseOrder = leftOfEdge(minimum, left, right);
+
+ if (less(left, right)) {
+ stack.add(left);
+ left = previous(left);
+ stackIsOnLeftSide = true;
+ } else {
+ stack.add(right);
+ right = next(right);
+ stackIsOnLeftSide = false;
+ }
+
+ for (int count = 0; count + 2 < m_length; ++count)
+ {
+ Q_ASSERT(stack.size() >= 2);
+ if (less(left, right)) {
+ if (stackIsOnLeftSide == false) {
+ for (int i = 0; i + 1 < stack.size(); ++i) {
+ result.push_back(indices(stack.at(i + 1)));
+ result.push_back(indices(left));
+ result.push_back(indices(stack.at(i)));
+ }
+ stack.first() = stack.last();
+ stack.resize(1);
+ } else {
+ while (stack.size() >= 2 && (clockwiseOrder ^ !leftOfEdge(left, stack.at(stack.size() - 2), stack.last()))) {
+ result.push_back(indices(stack.at(stack.size() - 2)));
+ result.push_back(indices(left));
+ result.push_back(indices(stack.last()));
+ stack.pop_back();
+ }
+ }
+ stack.add(left);
+ left = previous(left);
+ stackIsOnLeftSide = true;
+ } else {
+ if (stackIsOnLeftSide == true) {
+ for (int i = 0; i + 1 < stack.size(); ++i) {
+ result.push_back(indices(stack.at(i)));
+ result.push_back(indices(right));
+ result.push_back(indices(stack.at(i + 1)));
+ }
+ stack.first() = stack.last();
+ stack.resize(1);
+ } else {
+ while (stack.size() >= 2 && (clockwiseOrder ^ !leftOfEdge(right, stack.last(), stack.at(stack.size() - 2)))) {
+ result.push_back(indices(stack.last()));
+ result.push_back(indices(right));
+ result.push_back(indices(stack.at(stack.size() - 2)));
+ stack.pop_back();
+ }
+ }
+ stack.add(right);
+ right = next(right);
+ stackIsOnLeftSide = false;
+ }
+ }
+
+ m_first += m_length + 1;
+ }
+ m_parent->m_indices = result;
+}
+
+//============================================================================//
+// qTriangulate //
+//============================================================================//
+
+QTriangleSet qTriangulate(const qreal *polygon,
+ int count, uint hint, const QTransform &matrix)
+{
+ QTriangleSet triangleSet;
+ if (QGLExtensions::glExtensions() & QGLExtensions::ElementIndexUint) {
+ QTriangulator<quint32> triangulator;
+ triangulator.initialize(polygon, count, hint, matrix);
+ QVertexSet<quint32> vertexSet = triangulator.triangulate();
+ triangleSet.vertices = vertexSet.vertices;
+ triangleSet.indices.setDataUint(vertexSet.indices);
+
+ } else {
+ QTriangulator<quint16> triangulator;
+ triangulator.initialize(polygon, count, hint, matrix);
+ QVertexSet<quint16> vertexSet = triangulator.triangulate();
+ triangleSet.vertices = vertexSet.vertices;
+ triangleSet.indices.setDataUshort(vertexSet.indices);
+ }
+ return triangleSet;
+}
+
+QTriangleSet qTriangulate(const QVectorPath &path,
+ const QTransform &matrix, qreal lod)
+{
+ QTriangleSet triangleSet;
+ if (QGLExtensions::glExtensions() & QGLExtensions::ElementIndexUint) {
+ QTriangulator<quint32> triangulator;
+ triangulator.initialize(path, matrix, lod);
+ QVertexSet<quint32> vertexSet = triangulator.triangulate();
+ triangleSet.vertices = vertexSet.vertices;
+ triangleSet.indices.setDataUint(vertexSet.indices);
+ } else {
+ QTriangulator<quint16> triangulator;
+ triangulator.initialize(path, matrix, lod);
+ QVertexSet<quint16> vertexSet = triangulator.triangulate();
+ triangleSet.vertices = vertexSet.vertices;
+ triangleSet.indices.setDataUshort(vertexSet.indices);
+ }
+ return triangleSet;
+}
+
+QTriangleSet qTriangulate(const QPainterPath &path,
+ const QTransform &matrix, qreal lod)
+{
+ QTriangleSet triangleSet;
+ if (QGLExtensions::glExtensions() & QGLExtensions::ElementIndexUint) {
+ QTriangulator<quint32> triangulator;
+ triangulator.initialize(path, matrix, lod);
+ QVertexSet<quint32> vertexSet = triangulator.triangulate();
+ triangleSet.vertices = vertexSet.vertices;
+ triangleSet.indices.setDataUint(vertexSet.indices);
+ } else {
+ QTriangulator<quint16> triangulator;
+ triangulator.initialize(path, matrix, lod);
+ QVertexSet<quint16> vertexSet = triangulator.triangulate();
+ triangleSet.vertices = vertexSet.vertices;
+ triangleSet.indices.setDataUshort(vertexSet.indices);
+ }
+ return triangleSet;
+}
+
+QPolylineSet qPolyline(const QVectorPath &path,
+ const QTransform &matrix, qreal lod)
+{
+ QPolylineSet polyLineSet;
+ if (QGLExtensions::glExtensions() & QGLExtensions::ElementIndexUint) {
+ QTriangulator<quint32> triangulator;
+ triangulator.initialize(path, matrix, lod);
+ QVertexSet<quint32> vertexSet = triangulator.polyline();
+ polyLineSet.vertices = vertexSet.vertices;
+ polyLineSet.indices.setDataUint(vertexSet.indices);
+ } else {
+ QTriangulator<quint16> triangulator;
+ triangulator.initialize(path, matrix, lod);
+ QVertexSet<quint16> vertexSet = triangulator.triangulate();
+ polyLineSet.vertices = vertexSet.vertices;
+ polyLineSet.indices.setDataUshort(vertexSet.indices);
+ }
+ return polyLineSet;
+}
+
+QPolylineSet qPolyline(const QPainterPath &path,
+ const QTransform &matrix, qreal lod)
+{
+ QPolylineSet polyLineSet;
+ if (QGLExtensions::glExtensions() & QGLExtensions::ElementIndexUint) {
+ QTriangulator<quint32> triangulator;
+ triangulator.initialize(path, matrix, lod);
+ QVertexSet<quint32> vertexSet = triangulator.polyline();
+ polyLineSet.vertices = vertexSet.vertices;
+ polyLineSet.indices.setDataUint(vertexSet.indices);
+ } else {
+ QTriangulator<quint16> triangulator;
+ triangulator.initialize(path, matrix, lod);
+ QVertexSet<quint16> vertexSet = triangulator.triangulate();
+ polyLineSet.vertices = vertexSet.vertices;
+ polyLineSet.indices.setDataUshort(vertexSet.indices);
+ }
+ return polyLineSet;
+}
+
+QT_END_NAMESPACE
diff --git a/src/opengl/gl2paintengineex/qtriangulator_p.h b/src/opengl/gl2paintengineex/qtriangulator_p.h
new file mode 100644
index 0000000000..a205b923e9
--- /dev/null
+++ b/src/opengl/gl2paintengineex/qtriangulator_p.h
@@ -0,0 +1,148 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtOpenGL module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QTRIANGULATOR_P_H
+#define QTRIANGULATOR_P_H
+
+//
+// W A R N I N G
+// -------------
+//
+// This file is not part of the Qt API. It exists purely as an
+// implementation detail. This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QtCore/qvector.h>
+#include <QtGui/private/qvectorpath_p.h>
+
+QT_BEGIN_NAMESPACE
+
+class QVertexIndexVector
+{
+public:
+ enum Type {
+ UnsignedInt,
+ UnsignedShort
+ };
+
+ inline Type type() const { return t; }
+
+ inline void setDataUint(const QVector<quint32> &data)
+ {
+ t = UnsignedInt;
+ indices32 = data;
+ }
+
+ inline void setDataUshort(const QVector<quint16> &data)
+ {
+ t = UnsignedShort;
+ indices16 = data;
+ }
+
+ inline const void* data() const
+ {
+ if (t == UnsignedInt)
+ return indices32.data();
+ return indices16.data();
+ }
+
+ inline int size() const
+ {
+ if (t == UnsignedInt)
+ return indices32.size();
+ return indices16.size();
+ }
+
+ inline QVertexIndexVector &operator = (const QVertexIndexVector &other)
+ {
+ if (t == UnsignedInt)
+ indices32 = other.indices32;
+ else
+ indices16 = other.indices16;
+
+ return *this;
+ }
+
+private:
+
+ Type t;
+ QVector<quint32> indices32;
+ QVector<quint16> indices16;
+};
+
+struct QTriangleSet
+{
+ inline QTriangleSet() { }
+ inline QTriangleSet(const QTriangleSet &other) : vertices(other.vertices), indices(other.indices) { }
+ QTriangleSet &operator = (const QTriangleSet &other) {vertices = other.vertices; indices = other.indices; return *this;}
+
+ // The vertices of a triangle are given by: (x[i[n]], y[i[n]]), (x[j[n]], y[j[n]]), (x[k[n]], y[k[n]]), n = 0, 1, ...
+ QVector<qreal> vertices; // [x[0], y[0], x[1], y[1], x[2], ...]
+ QVertexIndexVector indices; // [i[0], j[0], k[0], i[1], j[1], k[1], i[2], ...]
+};
+
+struct QPolylineSet
+{
+ inline QPolylineSet() { }
+ inline QPolylineSet(const QPolylineSet &other) : vertices(other.vertices), indices(other.indices) { }
+ QPolylineSet &operator = (const QPolylineSet &other) {vertices = other.vertices; indices = other.indices; return *this;}
+
+ QVector<qreal> vertices; // [x[0], y[0], x[1], y[1], x[2], ...]
+ QVertexIndexVector indices;
+};
+
+// The vertex coordinates of the returned triangle set will be rounded to a grid with a mesh size
+// of 1/32. The polygon is first transformed, then scaled by 32, the coordinates are rounded to
+// integers, the polygon is triangulated, and then scaled back by 1/32.
+// 'hint' should be a combination of QVectorPath::Hints.
+// 'lod' is the level of detail. Default is 1. Curves are split into more lines when 'lod' is higher.
+QTriangleSet qTriangulate(const qreal *polygon, int count, uint hint = QVectorPath::PolygonHint | QVectorPath::OddEvenFill, const QTransform &matrix = QTransform());
+QTriangleSet qTriangulate(const QVectorPath &path, const QTransform &matrix = QTransform(), qreal lod = 1);
+QTriangleSet qTriangulate(const QPainterPath &path, const QTransform &matrix = QTransform(), qreal lod = 1);
+QPolylineSet qPolyline(const QVectorPath &path, const QTransform &matrix = QTransform(), qreal lod = 1);
+QPolylineSet qPolyline(const QPainterPath &path, const QTransform &matrix = QTransform(), qreal lod = 1);
+
+QT_END_NAMESPACE
+
+#endif
diff --git a/src/opengl/opengl.pro b/src/opengl/opengl.pro
new file mode 100644
index 0000000000..e7c1c446de
--- /dev/null
+++ b/src/opengl/opengl.pro
@@ -0,0 +1,181 @@
+TARGET = QtOpenGL
+QPRO_PWD = $$PWD
+QT = core gui
+DEFINES += QT_BUILD_OPENGL_LIB
+DEFINES += QT_NO_USING_NAMESPACE
+win32-msvc*|win32-icc:QMAKE_LFLAGS += /BASE:0x63000000
+solaris-cc*:QMAKE_CXXFLAGS_RELEASE -= -O2
+irix-cc*:QMAKE_CXXFLAGS += -no_prelink -ptused
+
+unix|win32-g++*:QMAKE_PKGCONFIG_REQUIRES = QtCore QtGui
+
+include(../qbase.pri)
+
+!win32:!embedded:!mac:!symbian:!qpa:CONFIG += x11
+contains(QT_CONFIG, opengl):CONFIG += opengl
+contains(QT_CONFIG, opengles1):CONFIG += opengles1
+contains(QT_CONFIG, opengles2):CONFIG += opengles2
+contains(QT_CONFIG, egl):CONFIG += egl
+
+HEADERS += qgl.h \
+ qgl_p.h \
+ qglcolormap.h \
+ qglfunctions.h \
+ qglpixelbuffer.h \
+ qglpixelbuffer_p.h \
+ qglframebufferobject.h \
+ qglframebufferobject_p.h \
+ qglextensions_p.h \
+ qglpaintdevice_p.h \
+ qglbuffer.h \
+
+
+SOURCES += qgl.cpp \
+ qglcolormap.cpp \
+ qglfunctions.cpp \
+ qglpixelbuffer.cpp \
+ qglframebufferobject.cpp \
+ qglextensions.cpp \
+ qglpaintdevice.cpp \
+ qglbuffer.cpp \
+
+
+!contains(QT_CONFIG, opengles2) {
+ HEADERS += qpaintengine_opengl_p.h
+ SOURCES += qpaintengine_opengl.cpp
+}
+
+!contains(QT_CONFIG, opengles1) {
+ HEADERS += qglshaderprogram.h \
+ qglpixmapfilter_p.h \
+ qgraphicsshadereffect_p.h \
+ qgraphicssystem_gl_p.h \
+ qwindowsurface_gl_p.h \
+ qpixmapdata_gl_p.h \
+ gl2paintengineex/qglgradientcache_p.h \
+ gl2paintengineex/qglengineshadermanager_p.h \
+ gl2paintengineex/qgl2pexvertexarray_p.h \
+ gl2paintengineex/qpaintengineex_opengl2_p.h \
+ gl2paintengineex/qglengineshadersource_p.h \
+ gl2paintengineex/qglcustomshaderstage_p.h \
+ gl2paintengineex/qtriangulatingstroker_p.h \
+ gl2paintengineex/qtriangulator_p.h \
+ gl2paintengineex/qtextureglyphcache_gl_p.h \
+ gl2paintengineex/qglshadercache_p.h \
+ gl2paintengineex/qglshadercache_meego_p.h
+
+ SOURCES += qglshaderprogram.cpp \
+ qglpixmapfilter.cpp \
+ qgraphicsshadereffect.cpp \
+ qgraphicssystem_gl.cpp \
+ qwindowsurface_gl.cpp \
+ qpixmapdata_gl.cpp \
+ gl2paintengineex/qglgradientcache.cpp \
+ gl2paintengineex/qglengineshadermanager.cpp \
+ gl2paintengineex/qgl2pexvertexarray.cpp \
+ gl2paintengineex/qpaintengineex_opengl2.cpp \
+ gl2paintengineex/qglcustomshaderstage.cpp \
+ gl2paintengineex/qtriangulatingstroker.cpp \
+ gl2paintengineex/qtriangulator.cpp \
+ gl2paintengineex/qtextureglyphcache_gl.cpp
+
+}
+
+qpa {
+ SOURCES += qgl_qpa.cpp \
+ qglpixelbuffer_stub.cpp
+}
+
+x11 {
+ contains(QT_CONFIG, egl) {
+ SOURCES += qgl_x11egl.cpp \
+ qglpixelbuffer_egl.cpp \
+ qgl_egl.cpp \
+ qpixmapdata_x11gl_egl.cpp \
+ qwindowsurface_x11gl.cpp
+
+ HEADERS += qgl_egl_p.h \
+ qpixmapdata_x11gl_p.h \
+ qwindowsurface_x11gl_p.h
+
+ } else {
+ SOURCES += qgl_x11.cpp \
+ qglpixelbuffer_x11.cpp
+ }
+
+ contains(QT_CONFIG, fontconfig) {
+ contains(QT_CONFIG, system-freetype) {
+ embedded:CONFIG += opentype
+ # pull in the proper freetype2 include directory
+ include($$QT_SOURCE_TREE/config.tests/unix/freetype/freetype.pri)
+ LIBS_PRIVATE += -lfreetype
+ } else {
+ ### Note: how does this compile with a non-system freetype?
+ # This probably does not compile
+ }
+ } else {
+ DEFINES *= QT_NO_FREETYPE
+ }
+
+ LIBS_PRIVATE += $$QMAKE_LIBS_DYNLOAD
+}
+
+mac:!qpa {
+ OBJECTIVE_SOURCES += qgl_mac.mm \
+ qglpixelbuffer_mac.mm
+ LIBS_PRIVATE += -framework AppKit -framework Carbon
+}
+win32:!wince*: {
+ DEFINES += QT_NO_EGL
+ SOURCES += qgl_win.cpp \
+ qglpixelbuffer_win.cpp
+}
+wince*: {
+ SOURCES += qgl_wince.cpp \
+ qglpixelbuffer_egl.cpp \
+ qgl_egl.cpp
+
+ HEADERS += qgl_egl_p.h
+}
+
+embedded {
+ SOURCES += qgl_qws.cpp \
+ qglpixelbuffer_egl.cpp \
+ qglscreen_qws.cpp \
+ qglwindowsurface_qws.cpp \
+ qgl_egl.cpp
+
+ HEADERS += qglscreen_qws.h \
+ qglwindowsurface_qws_p.h \
+ qgl_egl_p.h
+
+ contains(QT_CONFIG, fontconfig) {
+ include($$QT_SOURCE_TREE/config.tests/unix/freetype/freetype.pri)
+ } else {
+ DEFINES *= QT_NO_FREETYPE
+ }
+}
+
+symbian {
+ DEFINES += QGL_USE_TEXTURE_POOL QGL_NO_PRESERVED_SWAP
+ SOURCES -= qpixmapdata_gl.cpp
+ SOURCES += qgl_symbian.cpp \
+ qpixmapdata_poolgl.cpp \
+ qglpixelbuffer_egl.cpp \
+ qgl_egl.cpp \
+ qgltexturepool.cpp
+
+ HEADERS += qgl_egl_p.h \
+ qgltexturepool_p.h
+
+ contains(QT_CONFIG, freetype) {
+ DEFINES += QT_NO_FONTCONFIG
+ INCLUDEPATH += \
+ ../3rdparty/freetype/src \
+ ../3rdparty/freetype/include
+ }
+
+ symbian:TARGET.UID3 = 0x2002131A
+}
+
+INCLUDEPATH += ../3rdparty/harfbuzz/src
diff --git a/src/opengl/opengl.pro.user.2.1pre1 b/src/opengl/opengl.pro.user.2.1pre1
new file mode 100644
index 0000000000..0c38724b0b
--- /dev/null
+++ b/src/opengl/opengl.pro.user.2.1pre1
@@ -0,0 +1,83 @@
+<!DOCTYPE QtCreatorProject>
+<qtcreator>
+ <data>
+ <variable>ProjectExplorer.Project.ActiveTarget</variable>
+ <value type="int">0</value>
+ </data>
+ <data>
+ <variable>ProjectExplorer.Project.EditorSettings</variable>
+ <valuemap type="QVariantMap">
+ <value key="EditorConfiguration.Codec" type="QByteArray">UTF-8</value>
+ </valuemap>
+ </data>
+ <data>
+ <variable>ProjectExplorer.Project.Target.0</variable>
+ <valuemap type="QVariantMap">
+ <value key="ProjectExplorer.ProjectConfiguration.DisplayName" type="QString">Desktop</value>
+ <value key="ProjectExplorer.ProjectConfiguration.Id" type="QString">Qt4ProjectManager.Target.DesktopTarget</value>
+ <value key="ProjectExplorer.Target.ActiveBuildConfiguration" type="int">0</value>
+ <value key="ProjectExplorer.Target.ActiveRunConfiguration" type="int">0</value>
+ <valuemap key="ProjectExplorer.Target.BuildConfiguration.0" type="QVariantMap">
+ <valuemap key="ProjectExplorer.BuildConfiguration.BuildStep.0" type="QVariantMap">
+ <value key="ProjectExplorer.ProjectConfiguration.DisplayName" type="QString">qmake</value>
+ <value key="ProjectExplorer.ProjectConfiguration.Id" type="QString">QtProjectManager.QMakeBuildStep</value>
+ <valuelist key="QtProjectManager.QMakeBuildStep.QMakeArguments" type="QVariantList">
+ <value type="QString">QMAKE_ABSOLUTE_SOURCE_PATH=/home/jlind/dev/qt/lighthouse-master/src/opengl</value>
+ </valuelist>
+ </valuemap>
+ <valuemap key="ProjectExplorer.BuildConfiguration.BuildStep.1" type="QVariantMap">
+ <value key="ProjectExplorer.ProjectConfiguration.DisplayName" type="QString">Make</value>
+ <value key="ProjectExplorer.ProjectConfiguration.Id" type="QString">Qt4ProjectManager.MakeStep</value>
+ <value key="Qt4ProjectManager.MakeStep.Clean" type="bool">false</value>
+ <valuelist key="Qt4ProjectManager.MakeStep.MakeArguments" type="QVariantList">
+ <value type="QString">-j9</value>
+ </valuelist>
+ <value key="Qt4ProjectManager.MakeStep.MakeCommand" type="QString"></value>
+ </valuemap>
+ <value key="ProjectExplorer.BuildConfiguration.BuildStepsCount" type="int">2</value>
+ <valuemap key="ProjectExplorer.BuildConfiguration.CleanStep.0" type="QVariantMap">
+ <value key="ProjectExplorer.ProjectConfiguration.DisplayName" type="QString">Make</value>
+ <value key="ProjectExplorer.ProjectConfiguration.Id" type="QString">Qt4ProjectManager.MakeStep</value>
+ <value key="Qt4ProjectManager.MakeStep.Clean" type="bool">true</value>
+ <valuelist key="Qt4ProjectManager.MakeStep.MakeArguments" type="QVariantList">
+ <value type="QString">clean</value>
+ </valuelist>
+ <value key="Qt4ProjectManager.MakeStep.MakeCommand" type="QString"></value>
+ </valuemap>
+ <value key="ProjectExplorer.BuildConfiguration.CleanStepsCount" type="int">1</value>
+ <value key="ProjectExplorer.BuildConfiguration.ClearSystemEnvironment" type="bool">false</value>
+ <valuelist key="ProjectExplorer.BuildConfiguration.UserEnvironmentChanges" type="QVariantList"/>
+ <value key="ProjectExplorer.ProjectConfiguration.DisplayName" type="QString">Debug</value>
+ <value key="ProjectExplorer.ProjectConfiguration.Id" type="QString">Qt4ProjectManager.Qt4BuildConfiguration</value>
+ <value key="Qt4ProjectManager.Qt4BuildConfiguration.BuildConfiguration" type="int">2</value>
+ <value key="Qt4ProjectManager.Qt4BuildConfiguration.BuildDirectory" type="QString">/home/jlind/builds/master-lighthouse/src/opengl</value>
+ <value key="Qt4ProjectManager.Qt4BuildConfiguration.QtVersionId" type="int">23</value>
+ <value key="Qt4ProjectManager.Qt4BuildConfiguration.ToolChain" type="int">0</value>
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+ <value key="ProjectExplorer.ProjectConfiguration.DisplayName" type="QString">headers</value>
+ <value key="ProjectExplorer.ProjectConfiguration.Id" type="QString">Qt4ProjectManager.Qt4RunConfiguration</value>
+ <value key="Qt4ProjectManager.Qt4RunConfiguration.BaseEnvironmentBase" type="int">2</value>
+ <valuelist key="Qt4ProjectManager.Qt4RunConfiguration.CommandLineArguments" type="QVariantList"/>
+ <value key="Qt4ProjectManager.Qt4RunConfiguration.ProFile" type="QString">../../../../../builds/master-lighthouse/include/QtOpenGL/headers.pri</value>
+ <value key="Qt4ProjectManager.Qt4RunConfiguration.UseDyldImageSuffix" type="bool">false</value>
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+ <valuelist key="Qt4ProjectManager.Qt4RunConfiguration.UserEnvironmentChanges" type="QVariantList"/>
+ <value key="Qt4ProjectManager.Qt4RunConfiguration.UserSetName" type="bool">false</value>
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+ </valuemap>
+ </data>
+ <data>
+ <variable>ProjectExplorer.Project.TargetCount</variable>
+ <value type="int">1</value>
+ </data>
+ <data>
+ <variable>ProjectExplorer.Project.Updater.FileVersion</variable>
+ <value type="int">4</value>
+ </data>
+</qtcreator>
diff --git a/src/opengl/qgl.cpp b/src/opengl/qgl.cpp
new file mode 100644
index 0000000000..057fb55e2c
--- /dev/null
+++ b/src/opengl/qgl.cpp
@@ -0,0 +1,6057 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtOpenGL module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qapplication.h"
+#include "qplatformdefs.h"
+#include "qgl.h"
+#include <qdebug.h>
+
+#if defined(Q_WS_X11)
+#include "private/qt_x11_p.h"
+#include "private/qpixmap_x11_p.h"
+#define INT32 dummy_INT32
+#define INT8 dummy_INT8
+#ifdef QT_NO_EGL
+# include <GL/glx.h>
+#endif
+#undef INT32
+#undef INT8
+#include "qx11info_x11.h"
+#elif defined(Q_WS_MAC)
+# include <private/qt_mac_p.h>
+#endif
+
+#include <qdatetime.h>
+
+#include <stdlib.h> // malloc
+
+#include "qpixmap.h"
+#include "qimage.h"
+#include "qgl_p.h"
+
+#if !defined(QT_OPENGL_ES_1)
+#include "gl2paintengineex/qpaintengineex_opengl2_p.h"
+#include <private/qwindowsurface_gl_p.h>
+#endif
+
+#ifndef QT_OPENGL_ES_2
+#include <private/qpaintengine_opengl_p.h>
+#endif
+
+#ifdef Q_WS_QWS
+#include <private/qglwindowsurface_qws_p.h>
+#endif
+
+#ifdef Q_WS_QPA
+#include <QtGui/QPlatformGLContext>
+#endif
+
+#include <qglpixelbuffer.h>
+#include <qglframebufferobject.h>
+
+#include <private/qimage_p.h>
+#include <private/qpixmapdata_p.h>
+#include <private/qpixmapdata_gl_p.h>
+#include <private/qglpixelbuffer_p.h>
+#include <private/qimagepixmapcleanuphooks_p.h>
+#include "qcolormap.h"
+#include "qfile.h"
+#include "qlibrary.h"
+#include <qmutex.h>
+
+#if defined(QT_OPENGL_ES) && !defined(QT_NO_EGL)
+#include <EGL/egl.h>
+#endif
+#ifdef QGL_USE_TEXTURE_POOL
+#include <private/qgltexturepool_p.h>
+#endif
+
+// #define QT_GL_CONTEXT_RESOURCE_DEBUG
+
+QT_BEGIN_NAMESPACE
+
+#if defined(Q_WS_X11) || defined(Q_WS_MAC) || defined(Q_WS_QWS) || defined(Q_WS_QPA) || defined(Q_OS_SYMBIAN)
+QGLExtensionFuncs QGLContextPrivate::qt_extensionFuncs;
+#endif
+
+#ifdef Q_WS_X11
+extern const QX11Info *qt_x11Info(const QPaintDevice *pd);
+#endif
+
+struct QGLThreadContext {
+ ~QGLThreadContext() {
+ if (context)
+ context->doneCurrent();
+ }
+ QGLContext *context;
+};
+
+#ifndef Q_WS_QPA
+static QThreadStorage<QGLThreadContext *> qgl_context_storage;
+#endif
+
+Q_GLOBAL_STATIC(QGLFormat, qgl_default_format)
+
+class QGLDefaultOverlayFormat: public QGLFormat
+{
+public:
+ inline QGLDefaultOverlayFormat()
+ {
+ setOption(QGL::FormatOption(0xffff << 16)); // turn off all options
+ setOption(QGL::DirectRendering);
+ setPlane(1);
+ }
+};
+Q_GLOBAL_STATIC(QGLDefaultOverlayFormat, defaultOverlayFormatInstance)
+
+Q_GLOBAL_STATIC(QGLSignalProxy, theSignalProxy)
+QGLSignalProxy *QGLSignalProxy::instance()
+{
+ QGLSignalProxy *proxy = theSignalProxy();
+ if (proxy && proxy->thread() != qApp->thread()) {
+ if (proxy->thread() == QThread::currentThread())
+ proxy->moveToThread(qApp->thread());
+ }
+ return proxy;
+}
+
+
+class QGLEngineSelector
+{
+public:
+ QGLEngineSelector() : engineType(QPaintEngine::MaxUser)
+ {
+ }
+
+ void setPreferredPaintEngine(QPaintEngine::Type type) {
+ if (type == QPaintEngine::OpenGL || type == QPaintEngine::OpenGL2)
+ engineType = type;
+ }
+
+ QPaintEngine::Type preferredPaintEngine() {
+#ifdef Q_WS_MAC
+ // The ATI X1600 driver for Mac OS X does not support return
+ // values from functions in GLSL. Since working around this in
+ // the GL2 engine would require a big, ugly rewrite, we're
+ // falling back to the GL 1 engine..
+ static bool mac_x1600_check_done = false;
+ if (!mac_x1600_check_done) {
+ QGLTemporaryContext *tmp = 0;
+ if (!QGLContext::currentContext())
+ tmp = new QGLTemporaryContext();
+ if (strstr((char *) glGetString(GL_RENDERER), "X1600"))
+ engineType = QPaintEngine::OpenGL;
+ if (tmp)
+ delete tmp;
+ mac_x1600_check_done = true;
+ }
+#endif
+ if (engineType == QPaintEngine::MaxUser) {
+ // No user-set engine - use the defaults
+#if defined(QT_OPENGL_ES_2)
+ engineType = QPaintEngine::OpenGL2;
+#else
+ // We can't do this in the constructor for this object because it
+ // needs to be called *before* the QApplication constructor.
+ // Also check for the FragmentShader extension in conjunction with
+ // the 2.0 version flag, to cover the case where we export the display
+ // from an old GL 1.1 server to a GL 2.x client. In that case we can't
+ // use GL 2.0.
+ if ((QGLFormat::openGLVersionFlags() & QGLFormat::OpenGL_Version_2_0)
+ && (QGLExtensions::glExtensions() & QGLExtensions::FragmentShader)
+ && qgetenv("QT_GL_USE_OPENGL1ENGINE").isEmpty())
+ engineType = QPaintEngine::OpenGL2;
+ else
+ engineType = QPaintEngine::OpenGL;
+#endif
+ }
+ return engineType;
+ }
+
+private:
+ QPaintEngine::Type engineType;
+};
+
+Q_GLOBAL_STATIC(QGLEngineSelector, qgl_engine_selector)
+
+
+bool qt_gl_preferGL2Engine()
+{
+ return qgl_engine_selector()->preferredPaintEngine() == QPaintEngine::OpenGL2;
+}
+
+
+/*!
+ \namespace QGL
+ \inmodule QtOpenGL
+
+ \brief The QGL namespace specifies miscellaneous identifiers used
+ in the Qt OpenGL module.
+
+ \ingroup painting-3D
+*/
+
+/*!
+ \enum QGL::FormatOption
+
+ This enum specifies the format options that can be used to configure an OpenGL
+ context. These are set using QGLFormat::setOption().
+
+ \value DoubleBuffer Specifies the use of double buffering.
+ \value DepthBuffer Enables the use of a depth buffer.
+ \value Rgba Specifies that the context should use RGBA as its pixel format.
+ \value AlphaChannel Enables the use of an alpha channel.
+ \value AccumBuffer Enables the use of an accumulation buffer.
+ \value StencilBuffer Enables the use of a stencil buffer.
+ \value StereoBuffers Enables the use of a stereo buffers for use with visualization hardware.
+ \value DirectRendering Specifies that the context is used for direct rendering to a display.
+ \value HasOverlay Enables the use of an overlay.
+ \value SampleBuffers Enables the use of sample buffers.
+ \value DeprecatedFunctions Enables the use of deprecated functionality for OpenGL 3.x
+ contexts. A context with deprecated functionality enabled is
+ called a full context in the OpenGL specification.
+ \value SingleBuffer Specifies the use of a single buffer, as opposed to double buffers.
+ \value NoDepthBuffer Disables the use of a depth buffer.
+ \value ColorIndex Specifies that the context should use a color index as its pixel format.
+ \value NoAlphaChannel Disables the use of an alpha channel.
+ \value NoAccumBuffer Disables the use of an accumulation buffer.
+ \value NoStencilBuffer Disables the use of a stencil buffer.
+ \value NoStereoBuffers Disables the use of stereo buffers.
+ \value IndirectRendering Specifies that the context is used for indirect rendering to a buffer.
+ \value NoOverlay Disables the use of an overlay.
+ \value NoSampleBuffers Disables the use of sample buffers.
+ \value NoDeprecatedFunctions Disables the use of deprecated functionality for OpenGL 3.x
+ contexts. A context with deprecated functionality disabled is
+ called a forward compatible context in the OpenGL specification.
+
+ \sa {Sample Buffers Example}
+*/
+
+/*!
+ \fn void QGL::setPreferredPaintEngine(QPaintEngine::Type engineType)
+
+ \since 4.6
+
+ Sets the preferred OpenGL paint engine that is used to draw onto
+ QGLWidget, QGLPixelBuffer and QGLFramebufferObject targets with QPainter
+ in Qt.
+
+ The \a engineType parameter specifies which of the GL engines to
+ use. Only \c QPaintEngine::OpenGL and \c QPaintEngine::OpenGL2 are
+ valid parameters to this function. All other values are ignored.
+
+ By default, the \c QPaintEngine::OpenGL2 engine is used if GL/GLES
+ version 2.0 is available, otherwise \c QPaintEngine::OpenGL is
+ used.
+
+ \warning This function must be called before the QApplication
+ constructor is called.
+*/
+void QGL::setPreferredPaintEngine(QPaintEngine::Type engineType)
+{
+ qgl_engine_selector()->setPreferredPaintEngine(engineType);
+}
+
+
+/*****************************************************************************
+ QGLFormat implementation
+ *****************************************************************************/
+
+
+/*!
+ \class QGLFormat
+ \brief The QGLFormat class specifies the display format of an OpenGL
+ rendering context.
+
+ \ingroup painting-3D
+
+ A display format has several characteristics:
+ \list
+ \i \link setDoubleBuffer() Double or single buffering.\endlink
+ \i \link setDepth() Depth buffer.\endlink
+ \i \link setRgba() RGBA or color index mode.\endlink
+ \i \link setAlpha() Alpha channel.\endlink
+ \i \link setAccum() Accumulation buffer.\endlink
+ \i \link setStencil() Stencil buffer.\endlink
+ \i \link setStereo() Stereo buffers.\endlink
+ \i \link setDirectRendering() Direct rendering.\endlink
+ \i \link setOverlay() Presence of an overlay.\endlink
+ \i \link setPlane() Plane of an overlay.\endlink
+ \i \link setSampleBuffers() Multisample buffers.\endlink
+ \endlist
+
+ You can also specify preferred bit depths for the color buffer,
+ depth buffer, alpha buffer, accumulation buffer and the stencil
+ buffer with the functions: setRedBufferSize(), setGreenBufferSize(),
+ setBlueBufferSize(), setDepthBufferSize(), setAlphaBufferSize(),
+ setAccumBufferSize() and setStencilBufferSize().
+
+ Note that even if you specify that you prefer a 32 bit depth
+ buffer (e.g. with setDepthBufferSize(32)), the format that is
+ chosen may not have a 32 bit depth buffer, even if there is a
+ format available with a 32 bit depth buffer. The main reason for
+ this is how the system dependant picking algorithms work on the
+ different platforms, and some format options may have higher
+ precedence than others.
+
+ You create and tell a QGLFormat object what rendering options you
+ want from an OpenGL rendering context.
+
+ OpenGL drivers or accelerated hardware may or may not support
+ advanced features such as alpha channel or stereographic viewing.
+ If you request some features that the driver/hardware does not
+ provide when you create a QGLWidget, you will get a rendering
+ context with the nearest subset of features.
+
+ There are different ways to define the display characteristics of
+ a rendering context. One is to create a QGLFormat and make it the
+ default for the entire application:
+ \snippet doc/src/snippets/code/src_opengl_qgl.cpp 0
+
+ Or you can specify the desired format when creating an object of
+ your QGLWidget subclass:
+ \snippet doc/src/snippets/code/src_opengl_qgl.cpp 1
+
+ After the widget has been created, you can find out which of the
+ requested features the system was able to provide:
+ \snippet doc/src/snippets/code/src_opengl_qgl.cpp 2
+
+ \legalese
+ OpenGL is a trademark of Silicon Graphics, Inc. in the
+ United States and other countries.
+ \endlegalese
+
+ \sa QGLContext, QGLWidget
+*/
+
+#ifndef QT_OPENGL_ES
+
+static inline void transform_point(GLdouble out[4], const GLdouble m[16], const GLdouble in[4])
+{
+#define M(row,col) m[col*4+row]
+ out[0] =
+ M(0, 0) * in[0] + M(0, 1) * in[1] + M(0, 2) * in[2] + M(0, 3) * in[3];
+ out[1] =
+ M(1, 0) * in[0] + M(1, 1) * in[1] + M(1, 2) * in[2] + M(1, 3) * in[3];
+ out[2] =
+ M(2, 0) * in[0] + M(2, 1) * in[1] + M(2, 2) * in[2] + M(2, 3) * in[3];
+ out[3] =
+ M(3, 0) * in[0] + M(3, 1) * in[1] + M(3, 2) * in[2] + M(3, 3) * in[3];
+#undef M
+}
+
+static inline GLint qgluProject(GLdouble objx, GLdouble objy, GLdouble objz,
+ const GLdouble model[16], const GLdouble proj[16],
+ const GLint viewport[4],
+ GLdouble * winx, GLdouble * winy, GLdouble * winz)
+{
+ GLdouble in[4], out[4];
+
+ in[0] = objx;
+ in[1] = objy;
+ in[2] = objz;
+ in[3] = 1.0;
+ transform_point(out, model, in);
+ transform_point(in, proj, out);
+
+ if (in[3] == 0.0)
+ return GL_FALSE;
+
+ in[0] /= in[3];
+ in[1] /= in[3];
+ in[2] /= in[3];
+
+ *winx = viewport[0] + (1 + in[0]) * viewport[2] / 2;
+ *winy = viewport[1] + (1 + in[1]) * viewport[3] / 2;
+
+ *winz = (1 + in[2]) / 2;
+ return GL_TRUE;
+}
+
+#endif // !QT_OPENGL_ES
+
+/*!
+ Constructs a QGLFormat object with the following default settings:
+ \list
+ \i \link setDoubleBuffer() Double buffer:\endlink Enabled.
+ \i \link setDepth() Depth buffer:\endlink Enabled.
+ \i \link setRgba() RGBA:\endlink Enabled (i.e., color index disabled).
+ \i \link setAlpha() Alpha channel:\endlink Disabled.
+ \i \link setAccum() Accumulator buffer:\endlink Disabled.
+ \i \link setStencil() Stencil buffer:\endlink Enabled.
+ \i \link setStereo() Stereo:\endlink Disabled.
+ \i \link setDirectRendering() Direct rendering:\endlink Enabled.
+ \i \link setOverlay() Overlay:\endlink Disabled.
+ \i \link setPlane() Plane:\endlink 0 (i.e., normal plane).
+ \i \link setSampleBuffers() Multisample buffers:\endlink Disabled.
+ \endlist
+*/
+
+QGLFormat::QGLFormat()
+{
+ d = new QGLFormatPrivate;
+}
+
+
+/*!
+ Creates a QGLFormat object that is a copy of the current
+ defaultFormat().
+
+ If \a options is not 0, the default format is modified by the
+ specified format options. The \a options parameter should be
+ QGL::FormatOption values OR'ed together.
+
+ This constructor makes it easy to specify a certain desired format
+ in classes derived from QGLWidget, for example:
+ \snippet doc/src/snippets/code/src_opengl_qgl.cpp 3
+
+ Note that there are QGL::FormatOption values to turn format settings
+ both on and off, e.g. QGL::DepthBuffer and QGL::NoDepthBuffer,
+ QGL::DirectRendering and QGL::IndirectRendering, etc.
+
+ The \a plane parameter defaults to 0 and is the plane which this
+ format should be associated with. Not all OpenGL implementations
+ supports overlay/underlay rendering planes.
+
+ \sa defaultFormat(), setOption(), setPlane()
+*/
+
+QGLFormat::QGLFormat(QGL::FormatOptions options, int plane)
+{
+ d = new QGLFormatPrivate;
+ QGL::FormatOptions newOpts = options;
+ d->opts = defaultFormat().d->opts;
+ d->opts |= (newOpts & 0xffff);
+ d->opts &= ~(newOpts >> 16);
+ d->pln = plane;
+}
+
+/*!
+ \internal
+*/
+void QGLFormat::detach()
+{
+ if (d->ref != 1) {
+ QGLFormatPrivate *newd = new QGLFormatPrivate(d);
+ if (!d->ref.deref())
+ delete d;
+ d = newd;
+ }
+}
+
+/*!
+ Constructs a copy of \a other.
+*/
+
+QGLFormat::QGLFormat(const QGLFormat &other)
+{
+ d = other.d;
+ d->ref.ref();
+}
+
+/*!
+ Assigns \a other to this object.
+*/
+
+QGLFormat &QGLFormat::operator=(const QGLFormat &other)
+{
+ if (d != other.d) {
+ other.d->ref.ref();
+ if (!d->ref.deref())
+ delete d;
+ d = other.d;
+ }
+ return *this;
+}
+
+/*!
+ Destroys the QGLFormat.
+*/
+QGLFormat::~QGLFormat()
+{
+ if (!d->ref.deref())
+ delete d;
+}
+
+/*!
+ \fn bool QGLFormat::doubleBuffer() const
+
+ Returns true if double buffering is enabled; otherwise returns
+ false. Double buffering is enabled by default.
+
+ \sa setDoubleBuffer()
+*/
+
+/*!
+ If \a enable is true sets double buffering; otherwise sets single
+ buffering.
+
+ Double buffering is enabled by default.
+
+ Double buffering is a technique where graphics are rendered on an
+ off-screen buffer and not directly to the screen. When the drawing
+ has been completed, the program calls a swapBuffers() function to
+ exchange the screen contents with the buffer. The result is
+ flicker-free drawing and often better performance.
+
+ Note that single buffered contexts are currently not supported
+ with EGL.
+
+ \sa doubleBuffer(), QGLContext::swapBuffers(),
+ QGLWidget::swapBuffers()
+*/
+
+void QGLFormat::setDoubleBuffer(bool enable)
+{
+ setOption(enable ? QGL::DoubleBuffer : QGL::SingleBuffer);
+}
+
+
+/*!
+ \fn bool QGLFormat::depth() const
+
+ Returns true if the depth buffer is enabled; otherwise returns
+ false. The depth buffer is enabled by default.
+
+ \sa setDepth(), setDepthBufferSize()
+*/
+
+/*!
+ If \a enable is true enables the depth buffer; otherwise disables
+ the depth buffer.
+
+ The depth buffer is enabled by default.
+
+ The purpose of a depth buffer (or Z-buffering) is to remove hidden
+ surfaces. Pixels are assigned Z values based on the distance to
+ the viewer. A pixel with a high Z value is closer to the viewer
+ than a pixel with a low Z value. This information is used to
+ decide whether to draw a pixel or not.
+
+ \sa depth(), setDepthBufferSize()
+*/
+
+void QGLFormat::setDepth(bool enable)
+{
+ setOption(enable ? QGL::DepthBuffer : QGL::NoDepthBuffer);
+}
+
+
+/*!
+ \fn bool QGLFormat::rgba() const
+
+ Returns true if RGBA color mode is set. Returns false if color
+ index mode is set. The default color mode is RGBA.
+
+ \sa setRgba()
+*/
+
+/*!
+ If \a enable is true sets RGBA mode. If \a enable is false sets
+ color index mode.
+
+ The default color mode is RGBA.
+
+ RGBA is the preferred mode for most OpenGL applications. In RGBA
+ color mode you specify colors as red + green + blue + alpha
+ quadruplets.
+
+ In color index mode you specify an index into a color lookup
+ table.
+
+ \sa rgba()
+*/
+
+void QGLFormat::setRgba(bool enable)
+{
+ setOption(enable ? QGL::Rgba : QGL::ColorIndex);
+}
+
+
+/*!
+ \fn bool QGLFormat::alpha() const
+
+ Returns true if the alpha buffer in the framebuffer is enabled;
+ otherwise returns false. The alpha buffer is disabled by default.
+
+ \sa setAlpha(), setAlphaBufferSize()
+*/
+
+/*!
+ If \a enable is true enables the alpha buffer; otherwise disables
+ the alpha buffer.
+
+ The alpha buffer is disabled by default.
+
+ The alpha buffer is typically used for implementing transparency
+ or translucency. The A in RGBA specifies the transparency of a
+ pixel.
+
+ \sa alpha(), setAlphaBufferSize()
+*/
+
+void QGLFormat::setAlpha(bool enable)
+{
+ setOption(enable ? QGL::AlphaChannel : QGL::NoAlphaChannel);
+}
+
+
+/*!
+ \fn bool QGLFormat::accum() const
+
+ Returns true if the accumulation buffer is enabled; otherwise
+ returns false. The accumulation buffer is disabled by default.
+
+ \sa setAccum(), setAccumBufferSize()
+*/
+
+/*!
+ If \a enable is true enables the accumulation buffer; otherwise
+ disables the accumulation buffer.
+
+ The accumulation buffer is disabled by default.
+
+ The accumulation buffer is used to create blur effects and
+ multiple exposures.
+
+ \sa accum(), setAccumBufferSize()
+*/
+
+void QGLFormat::setAccum(bool enable)
+{
+ setOption(enable ? QGL::AccumBuffer : QGL::NoAccumBuffer);
+}
+
+
+/*!
+ \fn bool QGLFormat::stencil() const
+
+ Returns true if the stencil buffer is enabled; otherwise returns
+ false. The stencil buffer is enabled by default.
+
+ \sa setStencil(), setStencilBufferSize()
+*/
+
+/*!
+ If \a enable is true enables the stencil buffer; otherwise
+ disables the stencil buffer.
+
+ The stencil buffer is enabled by default.
+
+ The stencil buffer masks certain parts of the drawing area so that
+ masked parts are not drawn on.
+
+ \sa stencil(), setStencilBufferSize()
+*/
+
+void QGLFormat::setStencil(bool enable)
+{
+ setOption(enable ? QGL::StencilBuffer: QGL::NoStencilBuffer);
+}
+
+
+/*!
+ \fn bool QGLFormat::stereo() const
+
+ Returns true if stereo buffering is enabled; otherwise returns
+ false. Stereo buffering is disabled by default.
+
+ \sa setStereo()
+*/
+
+/*!
+ If \a enable is true enables stereo buffering; otherwise disables
+ stereo buffering.
+
+ Stereo buffering is disabled by default.
+
+ Stereo buffering provides extra color buffers to generate left-eye
+ and right-eye images.
+
+ \sa stereo()
+*/
+
+void QGLFormat::setStereo(bool enable)
+{
+ setOption(enable ? QGL::StereoBuffers : QGL::NoStereoBuffers);
+}
+
+
+/*!
+ \fn bool QGLFormat::directRendering() const
+
+ Returns true if direct rendering is enabled; otherwise returns
+ false.
+
+ Direct rendering is enabled by default.
+
+ \sa setDirectRendering()
+*/
+
+/*!
+ If \a enable is true enables direct rendering; otherwise disables
+ direct rendering.
+
+ Direct rendering is enabled by default.
+
+ Enabling this option will make OpenGL bypass the underlying window
+ system and render directly from hardware to the screen, if this is
+ supported by the system.
+
+ \sa directRendering()
+*/
+
+void QGLFormat::setDirectRendering(bool enable)
+{
+ setOption(enable ? QGL::DirectRendering : QGL::IndirectRendering);
+}
+
+/*!
+ \fn bool QGLFormat::sampleBuffers() const
+
+ Returns true if multisample buffer support is enabled; otherwise
+ returns false.
+
+ The multisample buffer is disabled by default.
+
+ \sa setSampleBuffers()
+*/
+
+/*!
+ If \a enable is true, a GL context with multisample buffer support
+ is picked; otherwise ignored.
+
+ \sa sampleBuffers(), setSamples(), samples()
+*/
+void QGLFormat::setSampleBuffers(bool enable)
+{
+ setOption(enable ? QGL::SampleBuffers : QGL::NoSampleBuffers);
+}
+
+/*!
+ Returns the number of samples per pixel when multisampling is
+ enabled. By default, the highest number of samples that is
+ available is used.
+
+ \sa setSampleBuffers(), sampleBuffers(), setSamples()
+*/
+int QGLFormat::samples() const
+{
+ return d->numSamples;
+}
+
+/*!
+ Set the preferred number of samples per pixel when multisampling
+ is enabled to \a numSamples. By default, the highest number of
+ samples available is used.
+
+ \sa setSampleBuffers(), sampleBuffers(), samples()
+*/
+void QGLFormat::setSamples(int numSamples)
+{
+ detach();
+ if (numSamples < 0) {
+ qWarning("QGLFormat::setSamples: Cannot have negative number of samples per pixel %d", numSamples);
+ return;
+ }
+ d->numSamples = numSamples;
+ setSampleBuffers(numSamples > 0);
+}
+
+/*!
+ \since 4.2
+
+ Set the preferred swap interval. This can be used to sync the GL
+ drawing into a system window to the vertical refresh of the screen.
+ Setting an \a interval value of 0 will turn the vertical refresh syncing
+ off, any value higher than 0 will turn the vertical syncing on.
+
+ Under Windows and under X11, where the \c{WGL_EXT_swap_control}
+ and \c{GLX_SGI_video_sync} extensions are used, the \a interval
+ parameter can be used to set the minimum number of video frames
+ that are displayed before a buffer swap will occur. In effect,
+ setting the \a interval to 10, means there will be 10 vertical
+ retraces between every buffer swap.
+
+ Under Windows the \c{WGL_EXT_swap_control} extension has to be present,
+ and under X11 the \c{GLX_SGI_video_sync} extension has to be present.
+*/
+void QGLFormat::setSwapInterval(int interval)
+{
+ detach();
+ d->swapInterval = interval;
+}
+
+/*!
+ \since 4.2
+
+ Returns the currently set swap interval. -1 is returned if setting
+ the swap interval isn't supported in the system GL implementation.
+*/
+int QGLFormat::swapInterval() const
+{
+ return d->swapInterval;
+}
+
+/*!
+ \fn bool QGLFormat::hasOverlay() const
+
+ Returns true if overlay plane is enabled; otherwise returns false.
+
+ Overlay is disabled by default.
+
+ \sa setOverlay()
+*/
+
+/*!
+ If \a enable is true enables an overlay plane; otherwise disables
+ the overlay plane.
+
+ Enabling the overlay plane will cause QGLWidget to create an
+ additional context in an overlay plane. See the QGLWidget
+ documentation for further information.
+
+ \sa hasOverlay()
+*/
+
+void QGLFormat::setOverlay(bool enable)
+{
+ setOption(enable ? QGL::HasOverlay : QGL::NoOverlay);
+}
+
+/*!
+ Returns the plane of this format. The default for normal formats
+ is 0, which means the normal plane. The default for overlay
+ formats is 1, which is the first overlay plane.
+
+ \sa setPlane(), defaultOverlayFormat()
+*/
+int QGLFormat::plane() const
+{
+ return d->pln;
+}
+
+/*!
+ Sets the requested plane to \a plane. 0 is the normal plane, 1 is
+ the first overlay plane, 2 is the second overlay plane, etc.; -1,
+ -2, etc. are underlay planes.
+
+ Note that in contrast to other format specifications, the plane
+ specifications will be matched exactly. This means that if you
+ specify a plane that the underlying OpenGL system cannot provide,
+ an \link QGLWidget::isValid() invalid\endlink QGLWidget will be
+ created.
+
+ \sa plane()
+*/
+void QGLFormat::setPlane(int plane)
+{
+ detach();
+ d->pln = plane;
+}
+
+/*!
+ Sets the format option to \a opt.
+
+ \sa testOption()
+*/
+
+void QGLFormat::setOption(QGL::FormatOptions opt)
+{
+ detach();
+ if (opt & 0xffff)
+ d->opts |= opt;
+ else
+ d->opts &= ~(opt >> 16);
+}
+
+
+
+/*!
+ Returns true if format option \a opt is set; otherwise returns false.
+
+ \sa setOption()
+*/
+
+bool QGLFormat::testOption(QGL::FormatOptions opt) const
+{
+ if (opt & 0xffff)
+ return (d->opts & opt) != 0;
+ else
+ return (d->opts & (opt >> 16)) == 0;
+}
+
+/*!
+ Set the minimum depth buffer size to \a size.
+
+ \sa depthBufferSize(), setDepth(), depth()
+*/
+void QGLFormat::setDepthBufferSize(int size)
+{
+ detach();
+ if (size < 0) {
+ qWarning("QGLFormat::setDepthBufferSize: Cannot set negative depth buffer size %d", size);
+ return;
+ }
+ d->depthSize = size;
+ setDepth(size > 0);
+}
+
+/*!
+ Returns the depth buffer size.
+
+ \sa depth(), setDepth(), setDepthBufferSize()
+*/
+int QGLFormat::depthBufferSize() const
+{
+ return d->depthSize;
+}
+
+/*!
+ \since 4.2
+
+ Set the preferred red buffer size to \a size.
+
+ \sa setGreenBufferSize(), setBlueBufferSize(), setAlphaBufferSize()
+*/
+void QGLFormat::setRedBufferSize(int size)
+{
+ detach();
+ if (size < 0) {
+ qWarning("QGLFormat::setRedBufferSize: Cannot set negative red buffer size %d", size);
+ return;
+ }
+ d->redSize = size;
+}
+
+/*!
+ \since 4.2
+
+ Returns the red buffer size.
+
+ \sa setRedBufferSize()
+*/
+int QGLFormat::redBufferSize() const
+{
+ return d->redSize;
+}
+
+/*!
+ \since 4.2
+
+ Set the preferred green buffer size to \a size.
+
+ \sa setRedBufferSize(), setBlueBufferSize(), setAlphaBufferSize()
+*/
+void QGLFormat::setGreenBufferSize(int size)
+{
+ detach();
+ if (size < 0) {
+ qWarning("QGLFormat::setGreenBufferSize: Cannot set negative green buffer size %d", size);
+ return;
+ }
+ d->greenSize = size;
+}
+
+/*!
+ \since 4.2
+
+ Returns the green buffer size.
+
+ \sa setGreenBufferSize()
+*/
+int QGLFormat::greenBufferSize() const
+{
+ return d->greenSize;
+}
+
+/*!
+ \since 4.2
+
+ Set the preferred blue buffer size to \a size.
+
+ \sa setRedBufferSize(), setGreenBufferSize(), setAlphaBufferSize()
+*/
+void QGLFormat::setBlueBufferSize(int size)
+{
+ detach();
+ if (size < 0) {
+ qWarning("QGLFormat::setBlueBufferSize: Cannot set negative blue buffer size %d", size);
+ return;
+ }
+ d->blueSize = size;
+}
+
+/*!
+ \since 4.2
+
+ Returns the blue buffer size.
+
+ \sa setBlueBufferSize()
+*/
+int QGLFormat::blueBufferSize() const
+{
+ return d->blueSize;
+}
+
+/*!
+ Set the preferred alpha buffer size to \a size.
+ This function implicitly enables the alpha channel.
+
+ \sa setRedBufferSize(), setGreenBufferSize(), alphaBufferSize()
+*/
+void QGLFormat::setAlphaBufferSize(int size)
+{
+ detach();
+ if (size < 0) {
+ qWarning("QGLFormat::setAlphaBufferSize: Cannot set negative alpha buffer size %d", size);
+ return;
+ }
+ d->alphaSize = size;
+ setAlpha(size > 0);
+}
+
+/*!
+ Returns the alpha buffer size.
+
+ \sa alpha(), setAlpha(), setAlphaBufferSize()
+*/
+int QGLFormat::alphaBufferSize() const
+{
+ return d->alphaSize;
+}
+
+/*!
+ Set the preferred accumulation buffer size, where \a size is the
+ bit depth for each RGBA component.
+
+ \sa accum(), setAccum(), accumBufferSize()
+*/
+void QGLFormat::setAccumBufferSize(int size)
+{
+ detach();
+ if (size < 0) {
+ qWarning("QGLFormat::setAccumBufferSize: Cannot set negative accumulate buffer size %d", size);
+ return;
+ }
+ d->accumSize = size;
+ setAccum(size > 0);
+}
+
+/*!
+ Returns the accumulation buffer size.
+
+ \sa setAccumBufferSize(), accum(), setAccum()
+*/
+int QGLFormat::accumBufferSize() const
+{
+ return d->accumSize;
+}
+
+/*!
+ Set the preferred stencil buffer size to \a size.
+
+ \sa stencilBufferSize(), setStencil(), stencil()
+*/
+void QGLFormat::setStencilBufferSize(int size)
+{
+ detach();
+ if (size < 0) {
+ qWarning("QGLFormat::setStencilBufferSize: Cannot set negative stencil buffer size %d", size);
+ return;
+ }
+ d->stencilSize = size;
+ setStencil(size > 0);
+}
+
+/*!
+ Returns the stencil buffer size.
+
+ \sa stencil(), setStencil(), setStencilBufferSize()
+*/
+int QGLFormat::stencilBufferSize() const
+{
+ return d->stencilSize;
+}
+
+/*!
+ \since 4.7
+
+ Set the OpenGL version to the \a major and \a minor numbers. If a
+ context compatible with the requested OpenGL version cannot be
+ created, a context compatible with version 1.x is created instead.
+
+ \sa majorVersion(), minorVersion()
+*/
+void QGLFormat::setVersion(int major, int minor)
+{
+ if (major < 1 || minor < 0) {
+ qWarning("QGLFormat::setVersion: Cannot set zero or negative version number %d.%d", major, minor);
+ return;
+ }
+ detach();
+ d->majorVersion = major;
+ d->minorVersion = minor;
+}
+
+/*!
+ \since 4.7
+
+ Returns the OpenGL major version.
+
+ \sa setVersion(), minorVersion()
+*/
+int QGLFormat::majorVersion() const
+{
+ return d->majorVersion;
+}
+
+/*!
+ \since 4.7
+
+ Returns the OpenGL minor version.
+
+ \sa setVersion(), majorVersion()
+*/
+int QGLFormat::minorVersion() const
+{
+ return d->minorVersion;
+}
+
+/*!
+ \enum QGLFormat::OpenGLContextProfile
+ \since 4.7
+
+ This enum describes the OpenGL context profiles that can be
+ specified for contexts implementing OpenGL version 3.2 or
+ higher. These profiles are different from OpenGL ES profiles.
+
+ \value NoProfile OpenGL version is lower than 3.2.
+ \value CoreProfile Functionality deprecated in OpenGL version 3.0 is not available.
+ \value CompatibilityProfile Functionality from earlier OpenGL versions is available.
+*/
+
+/*!
+ \since 4.7
+
+ Set the OpenGL context profile to \a profile. The \a profile is
+ ignored if the requested OpenGL version is less than 3.2.
+
+ \sa profile()
+*/
+void QGLFormat::setProfile(OpenGLContextProfile profile)
+{
+ detach();
+ d->profile = profile;
+}
+
+/*!
+ \since 4.7
+
+ Returns the OpenGL context profile.
+
+ \sa setProfile()
+*/
+QGLFormat::OpenGLContextProfile QGLFormat::profile() const
+{
+ return d->profile;
+}
+
+
+/*!
+ \fn bool QGLFormat::hasOpenGL()
+
+ Returns true if the window system has any OpenGL support;
+ otherwise returns false.
+
+ \warning This function must not be called until the QApplication
+ object has been created.
+*/
+
+
+
+/*!
+ \fn bool QGLFormat::hasOpenGLOverlays()
+
+ Returns true if the window system supports OpenGL overlays;
+ otherwise returns false.
+
+ \warning This function must not be called until the QApplication
+ object has been created.
+*/
+
+QGLFormat::OpenGLVersionFlags Q_AUTOTEST_EXPORT qOpenGLVersionFlagsFromString(const QString &versionString)
+{
+ QGLFormat::OpenGLVersionFlags versionFlags = QGLFormat::OpenGL_Version_None;
+
+ if (versionString.startsWith(QLatin1String("OpenGL ES"))) {
+ QStringList parts = versionString.split(QLatin1Char(' '));
+ if (parts.size() >= 3) {
+ if (parts[2].startsWith(QLatin1String("1."))) {
+ if (parts[1].endsWith(QLatin1String("-CM"))) {
+ versionFlags |= QGLFormat::OpenGL_ES_Common_Version_1_0 |
+ QGLFormat::OpenGL_ES_CommonLite_Version_1_0;
+ if (parts[2].startsWith(QLatin1String("1.1")))
+ versionFlags |= QGLFormat::OpenGL_ES_Common_Version_1_1 |
+ QGLFormat::OpenGL_ES_CommonLite_Version_1_1;
+ } else {
+ // Not -CM, must be CL, CommonLite
+ versionFlags |= QGLFormat::OpenGL_ES_CommonLite_Version_1_0;
+ if (parts[2].startsWith(QLatin1String("1.1")))
+ versionFlags |= QGLFormat::OpenGL_ES_CommonLite_Version_1_1;
+ }
+ } else {
+ // OpenGL ES version 2.0 or higher
+ versionFlags |= QGLFormat::OpenGL_ES_Version_2_0;
+ }
+ } else {
+ // if < 3 parts to the name, it is an unrecognised OpenGL ES
+ qWarning("Unrecognised OpenGL ES version");
+ }
+ } else {
+ // not ES, regular OpenGL, the version numbers are first in the string
+ if (versionString.startsWith(QLatin1String("1."))) {
+ switch (versionString[2].toAscii()) {
+ case '5':
+ versionFlags |= QGLFormat::OpenGL_Version_1_5;
+ case '4':
+ versionFlags |= QGLFormat::OpenGL_Version_1_4;
+ case '3':
+ versionFlags |= QGLFormat::OpenGL_Version_1_3;
+ case '2':
+ versionFlags |= QGLFormat::OpenGL_Version_1_2;
+ case '1':
+ versionFlags |= QGLFormat::OpenGL_Version_1_1;
+ default:
+ break;
+ }
+ } else if (versionString.startsWith(QLatin1String("2."))) {
+ versionFlags |= QGLFormat::OpenGL_Version_1_1 |
+ QGLFormat::OpenGL_Version_1_2 |
+ QGLFormat::OpenGL_Version_1_3 |
+ QGLFormat::OpenGL_Version_1_4 |
+ QGLFormat::OpenGL_Version_1_5 |
+ QGLFormat::OpenGL_Version_2_0;
+ if (versionString[2].toAscii() == '1')
+ versionFlags |= QGLFormat::OpenGL_Version_2_1;
+ } else if (versionString.startsWith(QLatin1String("3."))) {
+ versionFlags |= QGLFormat::OpenGL_Version_1_1 |
+ QGLFormat::OpenGL_Version_1_2 |
+ QGLFormat::OpenGL_Version_1_3 |
+ QGLFormat::OpenGL_Version_1_4 |
+ QGLFormat::OpenGL_Version_1_5 |
+ QGLFormat::OpenGL_Version_2_0 |
+ QGLFormat::OpenGL_Version_2_1 |
+ QGLFormat::OpenGL_Version_3_0;
+ switch (versionString[2].toAscii()) {
+ case '3':
+ versionFlags |= QGLFormat::OpenGL_Version_3_3;
+ case '2':
+ versionFlags |= QGLFormat::OpenGL_Version_3_2;
+ case '1':
+ versionFlags |= QGLFormat::OpenGL_Version_3_1;
+ case '0':
+ break;
+ default:
+ versionFlags |= QGLFormat::OpenGL_Version_3_1 |
+ QGLFormat::OpenGL_Version_3_2 |
+ QGLFormat::OpenGL_Version_3_3;
+ break;
+ }
+ } else if (versionString.startsWith(QLatin1String("4."))) {
+ versionFlags |= QGLFormat::OpenGL_Version_1_1 |
+ QGLFormat::OpenGL_Version_1_2 |
+ QGLFormat::OpenGL_Version_1_3 |
+ QGLFormat::OpenGL_Version_1_4 |
+ QGLFormat::OpenGL_Version_1_5 |
+ QGLFormat::OpenGL_Version_2_0 |
+ QGLFormat::OpenGL_Version_2_1 |
+ QGLFormat::OpenGL_Version_3_0 |
+ QGLFormat::OpenGL_Version_3_1 |
+ QGLFormat::OpenGL_Version_3_2 |
+ QGLFormat::OpenGL_Version_3_3 |
+ QGLFormat::OpenGL_Version_4_0;
+ } else {
+ versionFlags |= QGLFormat::OpenGL_Version_1_1 |
+ QGLFormat::OpenGL_Version_1_2 |
+ QGLFormat::OpenGL_Version_1_3 |
+ QGLFormat::OpenGL_Version_1_4 |
+ QGLFormat::OpenGL_Version_1_5 |
+ QGLFormat::OpenGL_Version_2_0 |
+ QGLFormat::OpenGL_Version_2_1 |
+ QGLFormat::OpenGL_Version_3_0 |
+ QGLFormat::OpenGL_Version_3_1 |
+ QGLFormat::OpenGL_Version_3_2 |
+ QGLFormat::OpenGL_Version_3_3 |
+ QGLFormat::OpenGL_Version_4_0;
+ }
+ }
+ return versionFlags;
+}
+
+/*!
+ \enum QGLFormat::OpenGLVersionFlag
+ \since 4.2
+
+ This enum describes the various OpenGL versions that are
+ recognized by Qt. Use the QGLFormat::openGLVersionFlags() function
+ to identify which versions that are supported at runtime.
+
+ \value OpenGL_Version_None If no OpenGL is present or if no OpenGL context is current.
+
+ \value OpenGL_Version_1_1 OpenGL version 1.1 or higher is present.
+
+ \value OpenGL_Version_1_2 OpenGL version 1.2 or higher is present.
+
+ \value OpenGL_Version_1_3 OpenGL version 1.3 or higher is present.
+
+ \value OpenGL_Version_1_4 OpenGL version 1.4 or higher is present.
+
+ \value OpenGL_Version_1_5 OpenGL version 1.5 or higher is present.
+
+ \value OpenGL_Version_2_0 OpenGL version 2.0 or higher is present.
+ Note that version 2.0 supports all the functionality of version 1.5.
+
+ \value OpenGL_Version_2_1 OpenGL version 2.1 or higher is present.
+
+ \value OpenGL_Version_3_0 OpenGL version 3.0 or higher is present.
+
+ \value OpenGL_Version_3_1 OpenGL version 3.1 or higher is present.
+ Note that OpenGL version 3.1 or higher does not necessarily support all the features of
+ version 3.0 and lower.
+
+ \value OpenGL_Version_3_2 OpenGL version 3.2 or higher is present.
+
+ \value OpenGL_Version_3_3 OpenGL version 3.3 or higher is present.
+
+ \value OpenGL_Version_4_0 OpenGL version 4.0 or higher is present.
+
+ \value OpenGL_ES_CommonLite_Version_1_0 OpenGL ES version 1.0 Common Lite or higher is present.
+
+ \value OpenGL_ES_Common_Version_1_0 OpenGL ES version 1.0 Common or higher is present.
+ The Common profile supports all the features of Common Lite.
+
+ \value OpenGL_ES_CommonLite_Version_1_1 OpenGL ES version 1.1 Common Lite or higher is present.
+
+ \value OpenGL_ES_Common_Version_1_1 OpenGL ES version 1.1 Common or higher is present.
+ The Common profile supports all the features of Common Lite.
+
+ \value OpenGL_ES_Version_2_0 OpenGL ES version 2.0 or higher is present.
+ Note that OpenGL ES version 2.0 does not support all the features of OpenGL ES 1.x.
+ So if OpenGL_ES_Version_2_0 is returned, none of the ES 1.x flags are returned.
+
+ See also \l{http://www.opengl.org} for more information about the different
+ revisions of OpenGL.
+
+ \sa openGLVersionFlags()
+*/
+
+/*!
+ \since 4.2
+
+ Identifies, at runtime, which OpenGL versions that are supported
+ by the current platform.
+
+ Note that if OpenGL version 1.5 is supported, its predecessors
+ (i.e., version 1.4 and lower) are also supported. To identify the
+ support of a particular feature, like multi texturing, test for
+ the version in which the feature was first introduced (i.e.,
+ version 1.3 in the case of multi texturing) to adapt to the largest
+ possible group of runtime platforms.
+
+ This function needs a valid current OpenGL context to work;
+ otherwise it will return OpenGL_Version_None.
+
+ \sa hasOpenGL(), hasOpenGLOverlays()
+*/
+QGLFormat::OpenGLVersionFlags QGLFormat::openGLVersionFlags()
+{
+ static bool cachedDefault = false;
+ static OpenGLVersionFlags defaultVersionFlags = OpenGL_Version_None;
+ QGLContext *currentCtx = const_cast<QGLContext *>(QGLContext::currentContext());
+ QGLTemporaryContext *tmpContext = 0;
+
+ if (currentCtx && currentCtx->d_func()->version_flags_cached)
+ return currentCtx->d_func()->version_flags;
+
+ if (!currentCtx) {
+ if (cachedDefault) {
+ return defaultVersionFlags;
+ } else {
+ if (!hasOpenGL())
+ return defaultVersionFlags;
+ tmpContext = new QGLTemporaryContext;
+ cachedDefault = true;
+ }
+ }
+
+ QString versionString(QLatin1String(reinterpret_cast<const char*>(glGetString(GL_VERSION))));
+ OpenGLVersionFlags versionFlags = qOpenGLVersionFlagsFromString(versionString);
+ if (currentCtx) {
+ currentCtx->d_func()->version_flags_cached = true;
+ currentCtx->d_func()->version_flags = versionFlags;
+ }
+ if (tmpContext) {
+ defaultVersionFlags = versionFlags;
+ delete tmpContext;
+ }
+
+ return versionFlags;
+}
+
+
+/*!
+ Returns the default QGLFormat for the application. All QGLWidget
+ objects that are created use this format unless another format is
+ specified, e.g. when they are constructed.
+
+ If no special default format has been set using
+ setDefaultFormat(), the default format is the same as that created
+ with QGLFormat().
+
+ \sa setDefaultFormat()
+*/
+
+QGLFormat QGLFormat::defaultFormat()
+{
+ return *qgl_default_format();
+}
+
+/*!
+ Sets a new default QGLFormat for the application to \a f. For
+ example, to set single buffering as the default instead of double
+ buffering, your main() might contain code like this:
+ \snippet doc/src/snippets/code/src_opengl_qgl.cpp 4
+
+ \sa defaultFormat()
+*/
+
+void QGLFormat::setDefaultFormat(const QGLFormat &f)
+{
+ *qgl_default_format() = f;
+}
+
+
+/*!
+ Returns the default QGLFormat for overlay contexts.
+
+ The default overlay format is:
+ \list
+ \i \link setDoubleBuffer() Double buffer:\endlink Disabled.
+ \i \link setDepth() Depth buffer:\endlink Disabled.
+ \i \link setRgba() RGBA:\endlink Disabled (i.e., color index enabled).
+ \i \link setAlpha() Alpha channel:\endlink Disabled.
+ \i \link setAccum() Accumulator buffer:\endlink Disabled.
+ \i \link setStencil() Stencil buffer:\endlink Disabled.
+ \i \link setStereo() Stereo:\endlink Disabled.
+ \i \link setDirectRendering() Direct rendering:\endlink Enabled.
+ \i \link setOverlay() Overlay:\endlink Disabled.
+ \i \link setSampleBuffers() Multisample buffers:\endlink Disabled.
+ \i \link setPlane() Plane:\endlink 1 (i.e., first overlay plane).
+ \endlist
+
+ \sa setDefaultFormat()
+*/
+
+QGLFormat QGLFormat::defaultOverlayFormat()
+{
+ return *defaultOverlayFormatInstance();
+}
+
+/*!
+ Sets a new default QGLFormat for overlay contexts to \a f. This
+ format is used whenever a QGLWidget is created with a format that
+ hasOverlay() enabled.
+
+ For example, to get a double buffered overlay context (if
+ available), use code like this:
+
+ \snippet doc/src/snippets/code/src_opengl_qgl.cpp 5
+
+ As usual, you can find out after widget creation whether the
+ underlying OpenGL system was able to provide the requested
+ specification:
+
+ \snippet doc/src/snippets/code/src_opengl_qgl.cpp 6
+
+ \sa defaultOverlayFormat()
+*/
+
+void QGLFormat::setDefaultOverlayFormat(const QGLFormat &f)
+{
+ QGLFormat *defaultFormat = defaultOverlayFormatInstance();
+ *defaultFormat = f;
+ // Make sure the user doesn't request that the overlays themselves
+ // have overlays, since it is unlikely that the system supports
+ // infinitely many planes...
+ defaultFormat->setOverlay(false);
+}
+
+
+/*!
+ Returns true if all the options of the two QGLFormat objects
+ \a a and \a b are equal; otherwise returns false.
+
+ \relates QGLFormat
+*/
+
+bool operator==(const QGLFormat& a, const QGLFormat& b)
+{
+ return (a.d == b.d) || ((int) a.d->opts == (int) b.d->opts
+ && a.d->pln == b.d->pln
+ && a.d->alphaSize == b.d->alphaSize
+ && a.d->accumSize == b.d->accumSize
+ && a.d->stencilSize == b.d->stencilSize
+ && a.d->depthSize == b.d->depthSize
+ && a.d->redSize == b.d->redSize
+ && a.d->greenSize == b.d->greenSize
+ && a.d->blueSize == b.d->blueSize
+ && a.d->numSamples == b.d->numSamples
+ && a.d->swapInterval == b.d->swapInterval
+ && a.d->majorVersion == b.d->majorVersion
+ && a.d->minorVersion == b.d->minorVersion
+ && a.d->profile == b.d->profile);
+}
+
+#ifndef QT_NO_DEBUG_STREAM
+QDebug operator<<(QDebug dbg, const QGLFormat &f)
+{
+ const QGLFormatPrivate * const d = f.d;
+
+ dbg.nospace() << "QGLFormat("
+ << "options " << d->opts
+ << ", plane " << d->pln
+ << ", depthBufferSize " << d->depthSize
+ << ", accumBufferSize " << d->accumSize
+ << ", stencilBufferSize " << d->stencilSize
+ << ", redBufferSize " << d->redSize
+ << ", greenBufferSize " << d->greenSize
+ << ", blueBufferSize " << d->blueSize
+ << ", alphaBufferSize " << d->alphaSize
+ << ", samples " << d->numSamples
+ << ", swapInterval " << d->swapInterval
+ << ", majorVersion " << d->majorVersion
+ << ", minorVersion " << d->minorVersion
+ << ", profile " << d->profile
+ << ')';
+
+ return dbg.space();
+}
+#endif
+
+
+/*!
+ Returns false if all the options of the two QGLFormat objects
+ \a a and \a b are equal; otherwise returns true.
+
+ \relates QGLFormat
+*/
+
+bool operator!=(const QGLFormat& a, const QGLFormat& b)
+{
+ return !(a == b);
+}
+
+struct QGLContextGroupList {
+ void append(QGLContextGroup *group) {
+ QMutexLocker locker(&m_mutex);
+ m_list.append(group);
+ }
+
+ void remove(QGLContextGroup *group) {
+ QMutexLocker locker(&m_mutex);
+ m_list.removeOne(group);
+ }
+
+ QList<QGLContextGroup *> m_list;
+ QMutex m_mutex;
+};
+
+Q_GLOBAL_STATIC(QGLContextGroupList, qt_context_groups)
+
+/*****************************************************************************
+ QGLContext implementation
+ *****************************************************************************/
+
+QGLContextGroup::QGLContextGroup(const QGLContext *context)
+ : m_context(context), m_guards(0), m_refs(1)
+{
+ qt_context_groups()->append(this);
+}
+
+QGLContextGroup::~QGLContextGroup()
+{
+ // Clear any remaining QGLSharedResourceGuard objects on the group.
+ QGLSharedResourceGuard *guard = m_guards;
+ while (guard != 0) {
+ guard->m_group = 0;
+ guard->m_id = 0;
+ guard = guard->m_next;
+ }
+ qt_context_groups()->remove(this);
+}
+
+void QGLContextGroup::addGuard(QGLSharedResourceGuard *guard)
+{
+ if (m_guards)
+ m_guards->m_prev = guard;
+ guard->m_next = m_guards;
+ guard->m_prev = 0;
+ m_guards = guard;
+}
+
+void QGLContextGroup::removeGuard(QGLSharedResourceGuard *guard)
+{
+ if (guard->m_next)
+ guard->m_next->m_prev = guard->m_prev;
+ if (guard->m_prev)
+ guard->m_prev->m_next = guard->m_next;
+ else
+ m_guards = guard->m_next;
+}
+
+const QGLContext *qt_gl_transfer_context(const QGLContext *ctx)
+{
+ if (!ctx)
+ return 0;
+ QList<const QGLContext *> shares
+ (QGLContextPrivate::contextGroup(ctx)->shares());
+ if (shares.size() >= 2)
+ return (ctx == shares.at(0)) ? shares.at(1) : shares.at(0);
+ else
+ return 0;
+}
+
+QGLContextPrivate::QGLContextPrivate(QGLContext *context)
+ : internal_context(false)
+ , q_ptr(context)
+{
+ group = new QGLContextGroup(context);
+ texture_destroyer = new QGLTextureDestroyer;
+ texture_destroyer->moveToThread(qApp->thread());
+}
+
+QGLContextPrivate::~QGLContextPrivate()
+{
+ if (!group->m_refs.deref()) {
+ Q_ASSERT(group->context() == q_ptr);
+ delete group;
+ }
+
+ delete texture_destroyer;
+}
+
+void QGLContextPrivate::init(QPaintDevice *dev, const QGLFormat &format)
+{
+ Q_Q(QGLContext);
+ glFormat = reqFormat = format;
+ valid = false;
+ q->setDevice(dev);
+#if defined(Q_WS_X11)
+ pbuf = 0;
+ gpm = 0;
+ vi = 0;
+ screen = QX11Info::appScreen();
+#endif
+#if defined(Q_WS_WIN)
+ dc = 0;
+ win = 0;
+ threadId = 0;
+ pixelFormatId = 0;
+ cmap = 0;
+ hbitmap = 0;
+ hbitmap_hdc = 0;
+#endif
+#if defined(Q_WS_MAC)
+# ifndef QT_MAC_USE_COCOA
+ update = false;
+# endif
+ vi = 0;
+#endif
+#if defined(Q_WS_QPA)
+ platformContext = 0;
+#endif
+#if !defined(QT_NO_EGL)
+ ownsEglContext = false;
+ eglContext = 0;
+ eglSurface = EGL_NO_SURFACE;
+#endif
+ fbo = 0;
+ crWin = false;
+ initDone = false;
+ sharing = false;
+ max_texture_size = -1;
+ version_flags_cached = false;
+ version_flags = QGLFormat::OpenGL_Version_None;
+ extension_flags_cached = false;
+ extension_flags = 0;
+ current_fbo = 0;
+ default_fbo = 0;
+ active_engine = 0;
+ workaround_needsFullClearOnEveryFrame = false;
+ workaround_brokenFBOReadBack = false;
+ workaround_brokenTexSubImage = false;
+ workaroundsCached = false;
+
+ workaround_brokenTextureFromPixmap = false;
+ workaround_brokenTextureFromPixmap_init = false;
+
+ workaround_brokenAlphaTexSubImage = false;
+ workaround_brokenAlphaTexSubImage_init = false;
+
+ for (int i = 0; i < QT_GL_VERTEX_ARRAY_TRACKED_COUNT; ++i)
+ vertexAttributeArraysEnabledState[i] = false;
+}
+
+QGLContext* QGLContext::currentCtx = 0;
+
+/*
+ Read back the contents of the currently bound framebuffer, used in
+ QGLWidget::grabFrameBuffer(), QGLPixelbuffer::toImage() and
+ QGLFramebufferObject::toImage()
+*/
+
+static void convertFromGLImage(QImage &img, int w, int h, bool alpha_format, bool include_alpha)
+{
+ if (QSysInfo::ByteOrder == QSysInfo::BigEndian) {
+ // OpenGL gives RGBA; Qt wants ARGB
+ uint *p = (uint*)img.bits();
+ uint *end = p + w*h;
+ if (alpha_format && include_alpha) {
+ while (p < end) {
+ uint a = *p << 24;
+ *p = (*p >> 8) | a;
+ p++;
+ }
+ } else {
+ // This is an old legacy fix for PowerPC based Macs, which
+ // we shouldn't remove
+ while (p < end) {
+ *p = 0xff000000 | (*p>>8);
+ ++p;
+ }
+ }
+ } else {
+ // OpenGL gives ABGR (i.e. RGBA backwards); Qt wants ARGB
+ for (int y = 0; y < h; y++) {
+ uint *q = (uint*)img.scanLine(y);
+ for (int x=0; x < w; ++x) {
+ const uint pixel = *q;
+ if (alpha_format && include_alpha) {
+ *q = ((pixel << 16) & 0xff0000) | ((pixel >> 16) & 0xff)
+ | (pixel & 0xff00ff00);
+ } else {
+ *q = 0xff000000 | ((pixel << 16) & 0xff0000)
+ | ((pixel >> 16) & 0xff) | (pixel & 0x00ff00);
+ }
+
+ q++;
+ }
+ }
+
+ }
+ img = img.mirrored();
+}
+
+QImage qt_gl_read_framebuffer(const QSize &size, bool alpha_format, bool include_alpha)
+{
+ QImage img(size, (alpha_format && include_alpha) ? QImage::Format_ARGB32_Premultiplied
+ : QImage::Format_RGB32);
+ int w = size.width();
+ int h = size.height();
+ glReadPixels(0, 0, w, h, GL_RGBA, GL_UNSIGNED_BYTE, img.bits());
+ convertFromGLImage(img, w, h, alpha_format, include_alpha);
+ return img;
+}
+
+QImage qt_gl_read_texture(const QSize &size, bool alpha_format, bool include_alpha)
+{
+ QImage img(size, alpha_format ? QImage::Format_ARGB32_Premultiplied : QImage::Format_RGB32);
+ int w = size.width();
+ int h = size.height();
+#if !defined(QT_OPENGL_ES_2) && !defined(QT_OPENGL_ES_1)
+ //### glGetTexImage not in GL ES 2.0, need to do something else here!
+ glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, img.bits());
+#endif
+ convertFromGLImage(img, w, h, alpha_format, include_alpha);
+ return img;
+}
+
+// returns the highest number closest to v, which is a power of 2
+// NB! assumes 32 bit ints
+int qt_next_power_of_two(int v)
+{
+ v--;
+ v |= v >> 1;
+ v |= v >> 2;
+ v |= v >> 4;
+ v |= v >> 8;
+ v |= v >> 16;
+ ++v;
+ return v;
+}
+
+typedef void (*_qt_pixmap_cleanup_hook_64)(qint64);
+typedef void (*_qt_image_cleanup_hook_64)(qint64);
+
+extern Q_GUI_EXPORT _qt_pixmap_cleanup_hook_64 qt_pixmap_cleanup_hook_64;
+extern Q_GUI_EXPORT _qt_image_cleanup_hook_64 qt_image_cleanup_hook_64;
+
+
+Q_GLOBAL_STATIC(QGLTextureCache, qt_gl_texture_cache)
+
+QGLTextureCache::QGLTextureCache()
+ : m_cache(64*1024) // cache ~64 MB worth of textures - this is not accurate though
+{
+ QImagePixmapCleanupHooks::instance()->addPixmapDataModificationHook(cleanupTexturesForPixampData);
+ QImagePixmapCleanupHooks::instance()->addPixmapDataDestructionHook(cleanupBeforePixmapDestruction);
+ QImagePixmapCleanupHooks::instance()->addImageHook(cleanupTexturesForCacheKey);
+}
+
+QGLTextureCache::~QGLTextureCache()
+{
+ QImagePixmapCleanupHooks::instance()->removePixmapDataModificationHook(cleanupTexturesForPixampData);
+ QImagePixmapCleanupHooks::instance()->removePixmapDataDestructionHook(cleanupBeforePixmapDestruction);
+ QImagePixmapCleanupHooks::instance()->removeImageHook(cleanupTexturesForCacheKey);
+}
+
+void QGLTextureCache::insert(QGLContext* ctx, qint64 key, QGLTexture* texture, int cost)
+{
+ QWriteLocker locker(&m_lock);
+ const QGLTextureCacheKey cacheKey = {key, QGLContextPrivate::contextGroup(ctx)};
+ m_cache.insert(cacheKey, texture, cost);
+}
+
+void QGLTextureCache::remove(qint64 key)
+{
+ QWriteLocker locker(&m_lock);
+ QMutexLocker groupLocker(&qt_context_groups()->m_mutex);
+ QList<QGLContextGroup *>::const_iterator it = qt_context_groups()->m_list.constBegin();
+ while (it != qt_context_groups()->m_list.constEnd()) {
+ const QGLTextureCacheKey cacheKey = {key, *it};
+ m_cache.remove(cacheKey);
+ ++it;
+ }
+}
+
+bool QGLTextureCache::remove(QGLContext* ctx, GLuint textureId)
+{
+ QWriteLocker locker(&m_lock);
+ QList<QGLTextureCacheKey> keys = m_cache.keys();
+ for (int i = 0; i < keys.size(); ++i) {
+ QGLTexture *tex = m_cache.object(keys.at(i));
+ if (tex->id == textureId && tex->context == ctx) {
+ tex->options |= QGLContext::MemoryManagedBindOption; // forces a glDeleteTextures() call
+ m_cache.remove(keys.at(i));
+ return true;
+ }
+ }
+ return false;
+}
+
+void QGLTextureCache::removeContextTextures(QGLContext* ctx)
+{
+ QWriteLocker locker(&m_lock);
+ QList<QGLTextureCacheKey> keys = m_cache.keys();
+ for (int i = 0; i < keys.size(); ++i) {
+ const QGLTextureCacheKey &key = keys.at(i);
+ if (m_cache.object(key)->context == ctx)
+ m_cache.remove(key);
+ }
+}
+
+/*
+ a hook that removes textures from the cache when a pixmap/image
+ is deref'ed
+*/
+void QGLTextureCache::cleanupTexturesForCacheKey(qint64 cacheKey)
+{
+ qt_gl_texture_cache()->remove(cacheKey);
+}
+
+
+void QGLTextureCache::cleanupTexturesForPixampData(QPixmapData* pmd)
+{
+ cleanupTexturesForCacheKey(pmd->cacheKey());
+}
+
+void QGLTextureCache::cleanupBeforePixmapDestruction(QPixmapData* pmd)
+{
+ // Remove any bound textures first:
+ cleanupTexturesForPixampData(pmd);
+
+#if defined(Q_WS_X11)
+ if (pmd->classId() == QPixmapData::X11Class) {
+ Q_ASSERT(pmd->ref == 0); // Make sure reference counting isn't broken
+ QGLContextPrivate::destroyGlSurfaceForPixmap(pmd);
+ }
+#endif
+}
+
+QGLTextureCache *QGLTextureCache::instance()
+{
+ return qt_gl_texture_cache();
+}
+
+// DDS format structure
+struct DDSFormat {
+ quint32 dwSize;
+ quint32 dwFlags;
+ quint32 dwHeight;
+ quint32 dwWidth;
+ quint32 dwLinearSize;
+ quint32 dummy1;
+ quint32 dwMipMapCount;
+ quint32 dummy2[11];
+ struct {
+ quint32 dummy3[2];
+ quint32 dwFourCC;
+ quint32 dummy4[5];
+ } ddsPixelFormat;
+};
+
+// compressed texture pixel formats
+#define FOURCC_DXT1 0x31545844
+#define FOURCC_DXT2 0x32545844
+#define FOURCC_DXT3 0x33545844
+#define FOURCC_DXT4 0x34545844
+#define FOURCC_DXT5 0x35545844
+
+#ifndef GL_COMPRESSED_RGB_S3TC_DXT1_EXT
+#define GL_COMPRESSED_RGB_S3TC_DXT1_EXT 0x83F0
+#define GL_COMPRESSED_RGBA_S3TC_DXT1_EXT 0x83F1
+#define GL_COMPRESSED_RGBA_S3TC_DXT3_EXT 0x83F2
+#define GL_COMPRESSED_RGBA_S3TC_DXT5_EXT 0x83F3
+#endif
+
+#ifndef GL_GENERATE_MIPMAP_SGIS
+#define GL_GENERATE_MIPMAP_SGIS 0x8191
+#define GL_GENERATE_MIPMAP_HINT_SGIS 0x8192
+#endif
+
+/*!
+ \class QGLContext
+ \brief The QGLContext class encapsulates an OpenGL rendering context.
+
+ \ingroup painting-3D
+
+ An OpenGL rendering context is a complete set of OpenGL state
+ variables. The rendering context's \l {QGL::FormatOption} {format}
+ is set in the constructor, but it can also be set later with
+ setFormat(). The format options that are actually set are returned
+ by format(); the options you asked for are returned by
+ requestedFormat(). Note that after a QGLContext object has been
+ constructed, the actual OpenGL context must be created by
+ explicitly calling the \link create() create()\endlink
+ function. The makeCurrent() function makes this context the
+ current rendering context. You can make \e no context current
+ using doneCurrent(). The reset() function will reset the context
+ and make it invalid.
+
+ You can examine properties of the context with, e.g. isValid(),
+ isSharing(), initialized(), windowCreated() and
+ overlayTransparentColor().
+
+ If you're using double buffering you can swap the screen contents
+ with the off-screen buffer using swapBuffers().
+
+ Please note that QGLContext is not thread safe.
+*/
+
+/*!
+ \enum QGLContext::BindOption
+ \since 4.6
+
+ A set of options to decide how to bind a texture using bindTexture().
+
+ \value NoBindOption Don't do anything, pass the texture straight
+ through.
+
+ \value InvertedYBindOption Specifies that the texture should be flipped
+ over the X axis so that the texture coordinate 0,0 corresponds to
+ the top left corner. Inverting the texture implies a deep copy
+ prior to upload.
+
+ \value MipmapBindOption Specifies that bindTexture() should try
+ to generate mipmaps. If the GL implementation supports the \c
+ GL_SGIS_generate_mipmap extension, mipmaps will be automatically
+ generated for the texture. Mipmap generation is only supported for
+ the \c GL_TEXTURE_2D target.
+
+ \value PremultipliedAlphaBindOption Specifies that the image should be
+ uploaded with premultiplied alpha and does a conversion accordingly.
+
+ \value LinearFilteringBindOption Specifies that the texture filtering
+ should be set to GL_LINEAR. Default is GL_NEAREST. If mipmap is
+ also enabled, filtering will be set to GL_LINEAR_MIPMAP_LINEAR.
+
+ \value DefaultBindOption In Qt 4.5 and earlier, bindTexture()
+ would mirror the image and automatically generate mipmaps. This
+ option helps preserve this default behavior.
+
+ \omitvalue CanFlipNativePixmapBindOption Used by x11 from pixmap to choose
+ whether or not it can bind the pixmap upside down or not.
+
+ \omitvalue MemoryManagedBindOption Used by paint engines to
+ indicate that the pixmap should be memory managed along side with
+ the pixmap/image that it stems from, e.g. installing destruction
+ hooks in them.
+
+ \omitvalue TemporarilyCachedBindOption Used by paint engines on some
+ platforms to indicate that the pixmap or image texture is possibly
+ cached only temporarily and must be destroyed immediately after the use.
+
+ \omitvalue InternalBindOption
+*/
+
+/*!
+ \obsolete
+
+ Constructs an OpenGL context for the given paint \a device, which
+ can be a widget or a pixmap. The \a format specifies several
+ display options for the context.
+
+ If the underlying OpenGL/Window system cannot satisfy all the
+ features requested in \a format, the nearest subset of features
+ will be used. After creation, the format() method will return the
+ actual format obtained.
+
+ Note that after a QGLContext object has been constructed, \l
+ create() must be called explicitly to create the actual OpenGL
+ context. The context will be \l {isValid()}{invalid} if it was not
+ possible to obtain a GL context at all.
+*/
+
+QGLContext::QGLContext(const QGLFormat &format, QPaintDevice *device)
+ : d_ptr(new QGLContextPrivate(this))
+{
+ Q_D(QGLContext);
+ d->init(device, format);
+}
+
+/*!
+ Constructs an OpenGL context with the given \a format which
+ specifies several display options for the context.
+
+ If the underlying OpenGL/Window system cannot satisfy all the
+ features requested in \a format, the nearest subset of features
+ will be used. After creation, the format() method will return the
+ actual format obtained.
+
+ Note that after a QGLContext object has been constructed, \l
+ create() must be called explicitly to create the actual OpenGL
+ context. The context will be \l {isValid()}{invalid} if it was not
+ possible to obtain a GL context at all.
+
+ \sa format(), isValid()
+*/
+QGLContext::QGLContext(const QGLFormat &format)
+ : d_ptr(new QGLContextPrivate(this))
+{
+ Q_D(QGLContext);
+ d->init(0, format);
+}
+
+/*!
+ Destroys the OpenGL context and frees its resources.
+*/
+
+QGLContext::~QGLContext()
+{
+ // remove any textures cached in this context
+ QGLTextureCache::instance()->removeContextTextures(this);
+
+ // clean up resources specific to this context
+ d_ptr->cleanup();
+ // clean up resources belonging to this context's group
+ d_ptr->group->cleanupResources(this);
+
+ QGLSignalProxy::instance()->emitAboutToDestroyContext(this);
+ reset();
+}
+
+void QGLContextPrivate::cleanup()
+{
+ QHash<QGLContextResourceBase *, void *>::ConstIterator it;
+ for (it = m_resources.begin(); it != m_resources.end(); ++it)
+ it.key()->freeResource(it.value());
+ m_resources.clear();
+}
+
+#define ctx q_ptr
+void QGLContextPrivate::setVertexAttribArrayEnabled(int arrayIndex, bool enabled)
+{
+ Q_ASSERT(arrayIndex < QT_GL_VERTEX_ARRAY_TRACKED_COUNT);
+#ifdef glEnableVertexAttribArray
+ Q_ASSERT(glEnableVertexAttribArray);
+#endif
+
+ if (vertexAttributeArraysEnabledState[arrayIndex] && !enabled)
+ glDisableVertexAttribArray(arrayIndex);
+
+ if (!vertexAttributeArraysEnabledState[arrayIndex] && enabled)
+ glEnableVertexAttribArray(arrayIndex);
+
+ vertexAttributeArraysEnabledState[arrayIndex] = enabled;
+}
+
+void QGLContextPrivate::syncGlState()
+{
+#ifdef glEnableVertexAttribArray
+ Q_ASSERT(glEnableVertexAttribArray);
+#endif
+ for (int i = 0; i < QT_GL_VERTEX_ARRAY_TRACKED_COUNT; ++i) {
+ if (vertexAttributeArraysEnabledState[i])
+ glEnableVertexAttribArray(i);
+ else
+ glDisableVertexAttribArray(i);
+ }
+
+}
+#undef ctx
+
+#ifdef QT_NO_EGL
+void QGLContextPrivate::swapRegion(const QRegion &)
+{
+ Q_Q(QGLContext);
+ q->swapBuffers();
+}
+#endif
+
+/*!
+ \overload
+
+ Reads the compressed texture file \a fileName and generates a 2D GL
+ texture from it.
+
+ This function can load DirectDrawSurface (DDS) textures in the
+ DXT1, DXT3 and DXT5 DDS formats if the \c GL_ARB_texture_compression
+ and \c GL_EXT_texture_compression_s3tc extensions are supported.
+
+ Since 4.6.1, textures in the ETC1 format can be loaded if the
+ \c GL_OES_compressed_ETC1_RGB8_texture extension is supported
+ and the ETC1 texture has been encapsulated in the PVR container format.
+ Also, textures in the PVRTC2 and PVRTC4 formats can be loaded
+ if the \c GL_IMG_texture_compression_pvrtc extension is supported.
+
+ \sa deleteTexture()
+*/
+
+GLuint QGLContext::bindTexture(const QString &fileName)
+{
+ QGLTexture texture(this);
+ QSize size = texture.bindCompressedTexture(fileName);
+ if (!size.isValid())
+ return 0;
+ return texture.id;
+}
+
+static inline QRgb qt_gl_convertToGLFormatHelper(QRgb src_pixel, GLenum texture_format)
+{
+ if (texture_format == GL_BGRA) {
+ if (QSysInfo::ByteOrder == QSysInfo::BigEndian) {
+ return ((src_pixel << 24) & 0xff000000)
+ | ((src_pixel >> 24) & 0x000000ff)
+ | ((src_pixel << 8) & 0x00ff0000)
+ | ((src_pixel >> 8) & 0x0000ff00);
+ } else {
+ return src_pixel;
+ }
+ } else { // GL_RGBA
+ if (QSysInfo::ByteOrder == QSysInfo::BigEndian) {
+ return (src_pixel << 8) | ((src_pixel >> 24) & 0xff);
+ } else {
+ return ((src_pixel << 16) & 0xff0000)
+ | ((src_pixel >> 16) & 0xff)
+ | (src_pixel & 0xff00ff00);
+ }
+ }
+}
+
+QRgb qt_gl_convertToGLFormat(QRgb src_pixel, GLenum texture_format)
+{
+ return qt_gl_convertToGLFormatHelper(src_pixel, texture_format);
+}
+
+static void convertToGLFormatHelper(QImage &dst, const QImage &img, GLenum texture_format)
+{
+ Q_ASSERT(dst.depth() == 32);
+ Q_ASSERT(img.depth() == 32);
+
+ if (dst.size() != img.size()) {
+ int target_width = dst.width();
+ int target_height = dst.height();
+ qreal sx = target_width / qreal(img.width());
+ qreal sy = target_height / qreal(img.height());
+
+ quint32 *dest = (quint32 *) dst.scanLine(0); // NB! avoid detach here
+ uchar *srcPixels = (uchar *) img.scanLine(img.height() - 1);
+ int sbpl = img.bytesPerLine();
+ int dbpl = dst.bytesPerLine();
+
+ int ix = int(0x00010000 / sx);
+ int iy = int(0x00010000 / sy);
+
+ quint32 basex = int(0.5 * ix);
+ quint32 srcy = int(0.5 * iy);
+
+ // scale, swizzle and mirror in one loop
+ while (target_height--) {
+ const uint *src = (const quint32 *) (srcPixels - (srcy >> 16) * sbpl);
+ int srcx = basex;
+ for (int x=0; x<target_width; ++x) {
+ dest[x] = qt_gl_convertToGLFormatHelper(src[srcx >> 16], texture_format);
+ srcx += ix;
+ }
+ dest = (quint32 *)(((uchar *) dest) + dbpl);
+ srcy += iy;
+ }
+ } else {
+ const int width = img.width();
+ const int height = img.height();
+ const uint *p = (const uint*) img.scanLine(img.height() - 1);
+ uint *q = (uint*) dst.scanLine(0);
+
+ if (texture_format == GL_BGRA) {
+ if (QSysInfo::ByteOrder == QSysInfo::BigEndian) {
+ // mirror + swizzle
+ for (int i=0; i < height; ++i) {
+ const uint *end = p + width;
+ while (p < end) {
+ *q = ((*p << 24) & 0xff000000)
+ | ((*p >> 24) & 0x000000ff)
+ | ((*p << 8) & 0x00ff0000)
+ | ((*p >> 8) & 0x0000ff00);
+ p++;
+ q++;
+ }
+ p -= 2 * width;
+ }
+ } else {
+ const uint bytesPerLine = img.bytesPerLine();
+ for (int i=0; i < height; ++i) {
+ memcpy(q, p, bytesPerLine);
+ q += width;
+ p -= width;
+ }
+ }
+ } else {
+ if (QSysInfo::ByteOrder == QSysInfo::BigEndian) {
+ for (int i=0; i < height; ++i) {
+ const uint *end = p + width;
+ while (p < end) {
+ *q = (*p << 8) | ((*p >> 24) & 0xff);
+ p++;
+ q++;
+ }
+ p -= 2 * width;
+ }
+ } else {
+ for (int i=0; i < height; ++i) {
+ const uint *end = p + width;
+ while (p < end) {
+ *q = ((*p << 16) & 0xff0000) | ((*p >> 16) & 0xff) | (*p & 0xff00ff00);
+ p++;
+ q++;
+ }
+ p -= 2 * width;
+ }
+ }
+ }
+ }
+}
+
+#if defined(Q_WS_X11) || defined(Q_WS_MAC) || defined(Q_WS_QWS) || defined(Q_WS_QPA) || defined(Q_OS_SYMBIAN)
+QGLExtensionFuncs& QGLContextPrivate::extensionFuncs(const QGLContext *)
+{
+ return qt_extensionFuncs;
+}
+#endif
+
+QImage QGLContextPrivate::convertToGLFormat(const QImage &image, bool force_premul,
+ GLenum texture_format)
+{
+ QImage::Format target_format = image.format();
+ if (force_premul || image.format() != QImage::Format_ARGB32)
+ target_format = QImage::Format_ARGB32_Premultiplied;
+
+ QImage result(image.width(), image.height(), target_format);
+ convertToGLFormatHelper(result, image.convertToFormat(target_format), texture_format);
+ return result;
+}
+
+/*! \internal */
+QGLTexture *QGLContextPrivate::bindTexture(const QImage &image, GLenum target, GLint format,
+ QGLContext::BindOptions options)
+{
+ Q_Q(QGLContext);
+
+ const qint64 key = image.cacheKey();
+ QGLTexture *texture = textureCacheLookup(key, target);
+ if (texture) {
+ if (image.paintingActive()) {
+ // A QPainter is active on the image - take the safe route and replace the texture.
+ q->deleteTexture(texture->id);
+ texture = 0;
+ } else {
+ glBindTexture(target, texture->id);
+ return texture;
+ }
+ }
+
+ if (!texture)
+ texture = bindTexture(image, target, format, key, options);
+ // NOTE: bindTexture(const QImage&, GLenum, GLint, const qint64, bool) should never return null
+ Q_ASSERT(texture);
+
+ // Enable the cleanup hooks for this image so that the texture cache entry is removed when the
+ // image gets deleted:
+ QImagePixmapCleanupHooks::enableCleanupHooks(image);
+
+ return texture;
+}
+
+// #define QGL_BIND_TEXTURE_DEBUG
+
+// map from Qt's ARGB endianness-dependent format to GL's big-endian RGBA layout
+static inline void qgl_byteSwapImage(QImage &img, GLenum pixel_type)
+{
+ const int width = img.width();
+ const int height = img.height();
+
+ if (pixel_type == GL_UNSIGNED_INT_8_8_8_8_REV
+ || (pixel_type == GL_UNSIGNED_BYTE && QSysInfo::ByteOrder == QSysInfo::LittleEndian))
+ {
+ for (int i = 0; i < height; ++i) {
+ uint *p = (uint *) img.scanLine(i);
+ for (int x = 0; x < width; ++x)
+ p[x] = ((p[x] << 16) & 0xff0000) | ((p[x] >> 16) & 0xff) | (p[x] & 0xff00ff00);
+ }
+ } else {
+ for (int i = 0; i < height; ++i) {
+ uint *p = (uint *) img.scanLine(i);
+ for (int x = 0; x < width; ++x)
+ p[x] = (p[x] << 8) | ((p[x] >> 24) & 0xff);
+ }
+ }
+}
+
+QGLTexture* QGLContextPrivate::bindTexture(const QImage &image, GLenum target, GLint internalFormat,
+ const qint64 key, QGLContext::BindOptions options)
+{
+ Q_Q(QGLContext);
+
+#ifdef QGL_BIND_TEXTURE_DEBUG
+ printf("QGLContextPrivate::bindTexture(), imageSize=(%d,%d), internalFormat =0x%x, options=%x, key=%llx\n",
+ image.width(), image.height(), internalFormat, int(options), key);
+ QTime time;
+ time.start();
+#endif
+
+#ifndef QT_NO_DEBUG
+ // Reset the gl error stack...git
+ while (glGetError() != GL_NO_ERROR) ;
+#endif
+
+ // Scale the pixmap if needed. GL textures needs to have the
+ // dimensions 2^n+2(border) x 2^m+2(border), unless we're using GL
+ // 2.0 or use the GL_TEXTURE_RECTANGLE texture target
+ int tx_w = qt_next_power_of_two(image.width());
+ int tx_h = qt_next_power_of_two(image.height());
+
+ QImage img = image;
+
+ if (!(QGLExtensions::glExtensions() & QGLExtensions::NPOTTextures)
+ && !(QGLFormat::openGLVersionFlags() & QGLFormat::OpenGL_ES_Version_2_0)
+ && (target == GL_TEXTURE_2D && (tx_w != image.width() || tx_h != image.height())))
+ {
+ img = img.scaled(tx_w, tx_h);
+#ifdef QGL_BIND_TEXTURE_DEBUG
+ printf(" - upscaled to %dx%d (%d ms)\n", tx_w, tx_h, time.elapsed());
+
+#endif
+ }
+
+ GLuint filtering = options & QGLContext::LinearFilteringBindOption ? GL_LINEAR : GL_NEAREST;
+
+ GLuint tx_id;
+ glGenTextures(1, &tx_id);
+ glBindTexture(target, tx_id);
+ glTexParameterf(target, GL_TEXTURE_MAG_FILTER, filtering);
+
+#if defined(QT_OPENGL_ES_2)
+ bool genMipmap = false;
+#endif
+ if (glFormat.directRendering()
+ && (QGLExtensions::glExtensions() & QGLExtensions::GenerateMipmap)
+ && target == GL_TEXTURE_2D
+ && (options & QGLContext::MipmapBindOption))
+ {
+#if !defined(QT_OPENGL_ES_2)
+ glHint(GL_GENERATE_MIPMAP_HINT_SGIS, GL_NICEST);
+#ifndef QT_OPENGL_ES
+ glTexParameteri(target, GL_GENERATE_MIPMAP_SGIS, GL_TRUE);
+#else
+ glTexParameterf(target, GL_GENERATE_MIPMAP_SGIS, GL_TRUE);
+#endif
+#else
+ glHint(GL_GENERATE_MIPMAP_HINT, GL_NICEST);
+ genMipmap = true;
+#endif
+ glTexParameterf(target, GL_TEXTURE_MIN_FILTER, options & QGLContext::LinearFilteringBindOption
+ ? GL_LINEAR_MIPMAP_LINEAR : GL_NEAREST_MIPMAP_NEAREST);
+#ifdef QGL_BIND_TEXTURE_DEBUG
+ printf(" - generating mipmaps (%d ms)\n", time.elapsed());
+#endif
+ } else {
+ glTexParameterf(target, GL_TEXTURE_MIN_FILTER, filtering);
+ }
+
+ QImage::Format target_format = img.format();
+ bool premul = options & QGLContext::PremultipliedAlphaBindOption;
+ GLenum externalFormat;
+ GLuint pixel_type;
+ if (QGLExtensions::glExtensions() & QGLExtensions::BGRATextureFormat) {
+ externalFormat = GL_BGRA;
+ if (QGLFormat::openGLVersionFlags() & QGLFormat::OpenGL_Version_1_2)
+ pixel_type = GL_UNSIGNED_INT_8_8_8_8_REV;
+ else
+ pixel_type = GL_UNSIGNED_BYTE;
+ } else {
+ externalFormat = GL_RGBA;
+ pixel_type = GL_UNSIGNED_BYTE;
+ }
+
+ switch (target_format) {
+ case QImage::Format_ARGB32:
+ if (premul) {
+ img = img.convertToFormat(target_format = QImage::Format_ARGB32_Premultiplied);
+#ifdef QGL_BIND_TEXTURE_DEBUG
+ printf(" - converted ARGB32 -> ARGB32_Premultiplied (%d ms) \n", time.elapsed());
+#endif
+ }
+ break;
+ case QImage::Format_ARGB32_Premultiplied:
+ if (!premul) {
+ img = img.convertToFormat(target_format = QImage::Format_ARGB32);
+#ifdef QGL_BIND_TEXTURE_DEBUG
+ printf(" - converted ARGB32_Premultiplied -> ARGB32 (%d ms)\n", time.elapsed());
+#endif
+ }
+ break;
+ case QImage::Format_RGB16:
+ pixel_type = GL_UNSIGNED_SHORT_5_6_5;
+ externalFormat = GL_RGB;
+ internalFormat = GL_RGB;
+ break;
+ case QImage::Format_RGB32:
+ break;
+ default:
+ if (img.hasAlphaChannel()) {
+ img = img.convertToFormat(premul
+ ? QImage::Format_ARGB32_Premultiplied
+ : QImage::Format_ARGB32);
+#ifdef QGL_BIND_TEXTURE_DEBUG
+ printf(" - converted to 32-bit alpha format (%d ms)\n", time.elapsed());
+#endif
+ } else {
+ img = img.convertToFormat(QImage::Format_RGB32);
+#ifdef QGL_BIND_TEXTURE_DEBUG
+ printf(" - converted to 32-bit (%d ms)\n", time.elapsed());
+#endif
+ }
+ }
+
+ if (options & QGLContext::InvertedYBindOption) {
+ if (img.isDetached()) {
+ int ipl = img.bytesPerLine() / 4;
+ int h = img.height();
+ for (int y=0; y<h/2; ++y) {
+ int *a = (int *) img.scanLine(y);
+ int *b = (int *) img.scanLine(h - y - 1);
+ for (int x=0; x<ipl; ++x)
+ qSwap(a[x], b[x]);
+ }
+ } else {
+ // Create a new image and copy across. If we use the
+ // above in-place code then a full copy of the image is
+ // made before the lines are swapped, which processes the
+ // data twice. This version should only do it once.
+ img = img.mirrored();
+ }
+#ifdef QGL_BIND_TEXTURE_DEBUG
+ printf(" - flipped bits over y (%d ms)\n", time.elapsed());
+#endif
+ }
+
+ if (externalFormat == GL_RGBA) {
+ // The only case where we end up with a depth different from
+ // 32 in the switch above is for the RGB16 case, where we set
+ // the format to GL_RGB
+ Q_ASSERT(img.depth() == 32);
+ qgl_byteSwapImage(img, pixel_type);
+#ifdef QGL_BIND_TEXTURE_DEBUG
+ printf(" - did byte swapping (%d ms)\n", time.elapsed());
+#endif
+ }
+#ifdef QT_OPENGL_ES
+ // OpenGL/ES requires that the internal and external formats be
+ // identical.
+ internalFormat = externalFormat;
+#endif
+#ifdef QGL_BIND_TEXTURE_DEBUG
+ printf(" - uploading, image.format=%d, externalFormat=0x%x, internalFormat=0x%x, pixel_type=0x%x\n",
+ img.format(), externalFormat, internalFormat, pixel_type);
+#endif
+
+ const QImage &constRef = img; // to avoid detach in bits()...
+#ifdef QGL_USE_TEXTURE_POOL
+ QGLTexturePool::instance()->createPermanentTexture(tx_id,
+ target,
+ 0, internalFormat,
+ img.width(), img.height(),
+ externalFormat,
+ pixel_type,
+ constRef.bits());
+#else
+ glTexImage2D(target, 0, internalFormat, img.width(), img.height(), 0, externalFormat,
+ pixel_type, constRef.bits());
+#endif
+#if defined(QT_OPENGL_ES_2)
+ if (genMipmap)
+ glGenerateMipmap(target);
+#endif
+#ifndef QT_NO_DEBUG
+ GLenum error = glGetError();
+ if (error != GL_NO_ERROR) {
+ qWarning(" - texture upload failed, error code 0x%x, enum: %d (%x)\n", error, target, target);
+ }
+#endif
+
+#ifdef QGL_BIND_TEXTURE_DEBUG
+ static int totalUploadTime = 0;
+ totalUploadTime += time.elapsed();
+ printf(" - upload done in %d ms, (accumulated: %d ms)\n", time.elapsed(), totalUploadTime);
+#endif
+
+
+ // this assumes the size of a texture is always smaller than the max cache size
+ int cost = img.width()*img.height()*4/1024;
+ QGLTexture *texture = new QGLTexture(q, tx_id, target, options);
+ QGLTextureCache::instance()->insert(q, key, texture, cost);
+
+ return texture;
+}
+
+QGLTexture *QGLContextPrivate::textureCacheLookup(const qint64 key, GLenum target)
+{
+ Q_Q(QGLContext);
+ QGLTexture *texture = QGLTextureCache::instance()->getTexture(q, key);
+ if (texture && texture->target == target
+ && (texture->context == q || QGLContext::areSharing(q, texture->context)))
+ {
+ return texture;
+ }
+ return 0;
+}
+
+/*! \internal */
+QGLTexture *QGLContextPrivate::bindTexture(const QPixmap &pixmap, GLenum target, GLint format, QGLContext::BindOptions options)
+{
+ Q_Q(QGLContext);
+ QPixmapData *pd = pixmap.pixmapData();
+#if !defined(QT_OPENGL_ES_1)
+ if (target == GL_TEXTURE_2D && pd->classId() == QPixmapData::OpenGLClass) {
+ const QGLPixmapData *data = static_cast<const QGLPixmapData *>(pd);
+
+ if (data->isValidContext(q)) {
+ data->bind();
+ return data->texture();
+ }
+ }
+#else
+ Q_UNUSED(pd);
+#endif
+
+ const qint64 key = pixmap.cacheKey();
+ QGLTexture *texture = textureCacheLookup(key, target);
+ if (texture) {
+ if (pixmap.paintingActive()) {
+ // A QPainter is active on the pixmap - take the safe route and replace the texture.
+ q->deleteTexture(texture->id);
+ texture = 0;
+ } else {
+ glBindTexture(target, texture->id);
+ return texture;
+ }
+ }
+
+#if defined(Q_WS_X11)
+ // Try to use texture_from_pixmap
+ const QX11Info *xinfo = qt_x11Info(paintDevice);
+ if (pd->classId() == QPixmapData::X11Class && pd->pixelType() == QPixmapData::PixmapType
+ && xinfo && xinfo->screen() == pixmap.x11Info().screen()
+ && target == GL_TEXTURE_2D
+ && QApplication::instance()->thread() == QThread::currentThread())
+ {
+ if (!workaround_brokenTextureFromPixmap_init) {
+ workaround_brokenTextureFromPixmap_init = true;
+
+ const QByteArray versionString(reinterpret_cast<const char*>(glGetString(GL_VERSION)));
+ const int pos = versionString.indexOf("NVIDIA ");
+
+ if (pos >= 0) {
+ const QByteArray nvidiaVersionString = versionString.mid(pos + strlen("NVIDIA "));
+
+ if (nvidiaVersionString.startsWith("195") || nvidiaVersionString.startsWith("256"))
+ workaround_brokenTextureFromPixmap = true;
+ }
+ }
+
+ if (!workaround_brokenTextureFromPixmap) {
+ texture = bindTextureFromNativePixmap(const_cast<QPixmap*>(&pixmap), key, options);
+ if (texture) {
+ texture->options |= QGLContext::MemoryManagedBindOption;
+ texture->boundPixmap = pd;
+ boundPixmaps.insert(pd, QPixmap(pixmap));
+ }
+ }
+ }
+#endif
+
+ if (!texture) {
+ QImage image = pixmap.toImage();
+ // If the system depth is 16 and the pixmap doesn't have an alpha channel
+ // then we convert it to RGB16 in the hope that it gets uploaded as a 16
+ // bit texture which is much faster to access than a 32-bit one.
+ if (pixmap.depth() == 16 && !image.hasAlphaChannel() )
+ image = image.convertToFormat(QImage::Format_RGB16);
+ texture = bindTexture(image, target, format, key, options);
+ }
+ // NOTE: bindTexture(const QImage&, GLenum, GLint, const qint64, bool) should never return null
+ Q_ASSERT(texture);
+
+ if (texture->id > 0)
+ QImagePixmapCleanupHooks::enableCleanupHooks(pixmap);
+
+ return texture;
+}
+
+/*! \internal */
+int QGLContextPrivate::maxTextureSize()
+{
+ if (max_texture_size != -1)
+ return max_texture_size;
+
+ glGetIntegerv(GL_MAX_TEXTURE_SIZE, &max_texture_size);
+
+#if defined(QT_OPENGL_ES)
+ return max_texture_size;
+#else
+ GLenum proxy = GL_PROXY_TEXTURE_2D;
+
+ GLint size;
+ GLint next = 64;
+ glTexImage2D(proxy, 0, GL_RGBA, next, next, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0);
+ glGetTexLevelParameteriv(proxy, 0, GL_TEXTURE_WIDTH, &size);
+ if (size == 0) {
+ return max_texture_size;
+ }
+ do {
+ size = next;
+ next = size * 2;
+
+ if (next > max_texture_size)
+ break;
+ glTexImage2D(proxy, 0, GL_RGBA, next, next, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0);
+ glGetTexLevelParameteriv(proxy, 0, GL_TEXTURE_WIDTH, &next);
+ } while (next > size);
+
+ max_texture_size = size;
+ return max_texture_size;
+#endif
+}
+
+/*!
+ Generates and binds a 2D GL texture to the current context, based
+ on \a image. The generated texture id is returned and can be used in
+ later \c glBindTexture() calls.
+
+ \overload
+*/
+GLuint QGLContext::bindTexture(const QImage &image, GLenum target, GLint format)
+{
+ if (image.isNull())
+ return 0;
+
+ Q_D(QGLContext);
+ QGLTexture *texture = d->bindTexture(image, target, format, DefaultBindOption);
+ return texture->id;
+}
+
+/*!
+ \since 4.6
+
+ Generates and binds a 2D GL texture to the current context, based
+ on \a image. The generated texture id is returned and can be used
+ in later \c glBindTexture() calls.
+
+ The \a target parameter specifies the texture target. The default
+ target is \c GL_TEXTURE_2D.
+
+ The \a format parameter sets the internal format for the
+ texture. The default format is \c GL_RGBA.
+
+ The binding \a options are a set of options used to decide how to
+ bind the texture to the context.
+
+ The texture that is generated is cached, so multiple calls to
+ bindTexture() with the same QImage will return the same texture
+ id.
+
+ Note that we assume default values for the glPixelStore() and
+ glPixelTransfer() parameters.
+
+ \sa deleteTexture()
+*/
+GLuint QGLContext::bindTexture(const QImage &image, GLenum target, GLint format, BindOptions options)
+{
+ if (image.isNull())
+ return 0;
+
+ Q_D(QGLContext);
+ QGLTexture *texture = d->bindTexture(image, target, format, options);
+ return texture->id;
+}
+
+#ifdef Q_MAC_COMPAT_GL_FUNCTIONS
+/*! \internal */
+GLuint QGLContext::bindTexture(const QImage &image, QMacCompatGLenum target, QMacCompatGLint format)
+{
+ if (image.isNull())
+ return 0;
+
+ Q_D(QGLContext);
+ QGLTexture *texture = d->bindTexture(image, GLenum(target), GLint(format), DefaultBindOption);
+ return texture->id;
+}
+
+/*! \internal */
+GLuint QGLContext::bindTexture(const QImage &image, QMacCompatGLenum target, QMacCompatGLint format,
+ BindOptions options)
+{
+ if (image.isNull())
+ return 0;
+
+ Q_D(QGLContext);
+ QGLTexture *texture = d->bindTexture(image, GLenum(target), GLint(format), options);
+ return texture->id;
+}
+#endif
+
+/*! \overload
+
+ Generates and binds a 2D GL texture based on \a pixmap.
+*/
+GLuint QGLContext::bindTexture(const QPixmap &pixmap, GLenum target, GLint format)
+{
+ if (pixmap.isNull())
+ return 0;
+
+ Q_D(QGLContext);
+ QGLTexture *texture = d->bindTexture(pixmap, target, format, DefaultBindOption);
+ return texture->id;
+}
+
+/*!
+ \overload
+ \since 4.6
+
+ Generates and binds a 2D GL texture to the current context, based
+ on \a pixmap.
+*/
+GLuint QGLContext::bindTexture(const QPixmap &pixmap, GLenum target, GLint format, BindOptions options)
+{
+ if (pixmap.isNull())
+ return 0;
+
+ Q_D(QGLContext);
+ QGLTexture *texture = d->bindTexture(pixmap, target, format, options);
+ return texture->id;
+}
+
+#ifdef Q_MAC_COMPAT_GL_FUNCTIONS
+/*! \internal */
+GLuint QGLContext::bindTexture(const QPixmap &pixmap, QMacCompatGLenum target, QMacCompatGLint format)
+{
+ if (pixmap.isNull())
+ return 0;
+
+ Q_D(QGLContext);
+ QGLTexture *texture = d->bindTexture(pixmap, GLenum(target), GLint(format), DefaultBindOption);
+ return texture->id;
+}
+/*! \internal */
+GLuint QGLContext::bindTexture(const QPixmap &pixmap, QMacCompatGLenum target, QMacCompatGLint format,
+ BindOptions options)
+{
+ if (pixmap.isNull())
+ return 0;
+
+ Q_D(QGLContext);
+ QGLTexture *texture = d->bindTexture(pixmap, GLenum(target), GLint(format), options);
+ return texture->id;
+}
+#endif
+
+/*!
+ Removes the texture identified by \a id from the texture cache,
+ and calls glDeleteTextures() to delete the texture from the
+ context.
+
+ \sa bindTexture()
+*/
+void QGLContext::deleteTexture(GLuint id)
+{
+ if (QGLTextureCache::instance()->remove(this, id))
+ return;
+ glDeleteTextures(1, &id);
+}
+
+#ifdef Q_MAC_COMPAT_GL_FUNCTIONS
+/*! \internal */
+void QGLContext::deleteTexture(QMacCompatGLuint id)
+{
+ return deleteTexture(GLuint(id));
+}
+#endif
+
+void qt_add_rect_to_array(const QRectF &r, GLfloat *array)
+{
+ qreal left = r.left();
+ qreal right = r.right();
+ qreal top = r.top();
+ qreal bottom = r.bottom();
+
+ array[0] = left;
+ array[1] = top;
+ array[2] = right;
+ array[3] = top;
+ array[4] = right;
+ array[5] = bottom;
+ array[6] = left;
+ array[7] = bottom;
+}
+
+void qt_add_texcoords_to_array(qreal x1, qreal y1, qreal x2, qreal y2, GLfloat *array)
+{
+ array[0] = x1;
+ array[1] = y1;
+ array[2] = x2;
+ array[3] = y1;
+ array[4] = x2;
+ array[5] = y2;
+ array[6] = x1;
+ array[7] = y2;
+}
+
+#if !defined(QT_OPENGL_ES_2)
+
+static void qDrawTextureRect(const QRectF &target, GLint textureWidth, GLint textureHeight, GLenum textureTarget)
+{
+ GLfloat tx = 1.0f;
+ GLfloat ty = 1.0f;
+
+#ifdef QT_OPENGL_ES
+ Q_UNUSED(textureWidth);
+ Q_UNUSED(textureHeight);
+ Q_UNUSED(textureTarget);
+#else
+ if (textureTarget != GL_TEXTURE_2D) {
+ if (textureWidth == -1 || textureHeight == -1) {
+ glGetTexLevelParameteriv(textureTarget, 0, GL_TEXTURE_WIDTH, &textureWidth);
+ glGetTexLevelParameteriv(textureTarget, 0, GL_TEXTURE_HEIGHT, &textureHeight);
+ }
+
+ tx = GLfloat(textureWidth);
+ ty = GLfloat(textureHeight);
+ }
+#endif
+
+ GLfloat texCoordArray[4*2] = {
+ 0, ty, tx, ty, tx, 0, 0, 0
+ };
+
+ GLfloat vertexArray[4*2];
+ qt_add_rect_to_array(target, vertexArray);
+
+ glVertexPointer(2, GL_FLOAT, 0, vertexArray);
+ glTexCoordPointer(2, GL_FLOAT, 0, texCoordArray);
+
+ glEnableClientState(GL_VERTEX_ARRAY);
+ glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+ glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
+
+ glDisableClientState(GL_VERTEX_ARRAY);
+ glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+}
+
+#endif // !QT_OPENGL_ES_2
+
+/*!
+ \since 4.4
+
+ This function supports the following use cases:
+
+ \list
+ \i On OpenGL and OpenGL ES 1.x it draws the given texture, \a textureId,
+ to the given target rectangle, \a target, in OpenGL model space. The
+ \a textureTarget should be a 2D texture target.
+ \i On OpenGL and OpenGL ES 2.x, if a painter is active, not inside a
+ beginNativePainting / endNativePainting block, and uses the
+ engine with type QPaintEngine::OpenGL2, the function will draw the given
+ texture, \a textureId, to the given target rectangle, \a target,
+ respecting the current painter state. This will let you draw a texture
+ with the clip, transform, render hints, and composition mode set by the
+ painter. Note that the texture target needs to be GL_TEXTURE_2D for this
+ use case, and that this is the only supported use case under OpenGL ES 2.x.
+ \endlist
+
+*/
+void QGLContext::drawTexture(const QRectF &target, GLuint textureId, GLenum textureTarget)
+{
+#if !defined(QT_OPENGL_ES) || defined(QT_OPENGL_ES_2)
+ if (d_ptr->active_engine &&
+ d_ptr->active_engine->type() == QPaintEngine::OpenGL2) {
+ QGL2PaintEngineEx *eng = static_cast<QGL2PaintEngineEx*>(d_ptr->active_engine);
+ if (!eng->isNativePaintingActive()) {
+ QRectF src(0, 0, target.width(), target.height());
+ QSize size(target.width(), target.height());
+ if (eng->drawTexture(target, textureId, size, src))
+ return;
+ }
+ }
+#endif
+
+#ifndef QT_OPENGL_ES_2
+#ifdef QT_OPENGL_ES
+ if (textureTarget != GL_TEXTURE_2D) {
+ qWarning("QGLContext::drawTexture(): texture target must be GL_TEXTURE_2D on OpenGL ES");
+ return;
+ }
+#else
+ const bool wasEnabled = glIsEnabled(GL_TEXTURE_2D);
+ GLint oldTexture;
+ glGetIntegerv(GL_TEXTURE_BINDING_2D, &oldTexture);
+#endif
+
+ glEnable(textureTarget);
+ glBindTexture(textureTarget, textureId);
+
+ qDrawTextureRect(target, -1, -1, textureTarget);
+
+#ifdef QT_OPENGL_ES
+ glDisable(textureTarget);
+#else
+ if (!wasEnabled)
+ glDisable(textureTarget);
+ glBindTexture(textureTarget, oldTexture);
+#endif
+#else
+ Q_UNUSED(target);
+ Q_UNUSED(textureId);
+ Q_UNUSED(textureTarget);
+ qWarning("drawTexture() with OpenGL ES 2.0 requires an active OpenGL2 paint engine");
+#endif
+}
+
+#ifdef Q_MAC_COMPAT_GL_FUNCTIONS
+/*! \internal */
+void QGLContext::drawTexture(const QRectF &target, QMacCompatGLuint textureId, QMacCompatGLenum textureTarget)
+{
+ drawTexture(target, GLuint(textureId), GLenum(textureTarget));
+}
+#endif
+
+/*!
+ \since 4.4
+
+ This function supports the following use cases:
+
+ \list
+ \i By default it draws the given texture, \a textureId,
+ at the given \a point in OpenGL model space. The
+ \a textureTarget should be a 2D texture target.
+ \i If a painter is active, not inside a
+ beginNativePainting / endNativePainting block, and uses the
+ engine with type QPaintEngine::OpenGL2, the function will draw the given
+ texture, \a textureId, at the given \a point,
+ respecting the current painter state. This will let you draw a texture
+ with the clip, transform, render hints, and composition mode set by the
+ painter. Note that the texture target needs to be GL_TEXTURE_2D for this
+ use case.
+ \endlist
+
+ \note This function is not supported under any version of OpenGL ES.
+*/
+void QGLContext::drawTexture(const QPointF &point, GLuint textureId, GLenum textureTarget)
+{
+#ifdef QT_OPENGL_ES
+ Q_UNUSED(point);
+ Q_UNUSED(textureId);
+ Q_UNUSED(textureTarget);
+ qWarning("drawTexture(const QPointF &point, GLuint textureId, GLenum textureTarget) not supported with OpenGL ES, use rect version instead");
+#else
+
+ const bool wasEnabled = glIsEnabled(GL_TEXTURE_2D);
+ GLint oldTexture;
+ glGetIntegerv(GL_TEXTURE_BINDING_2D, &oldTexture);
+
+ glEnable(textureTarget);
+ glBindTexture(textureTarget, textureId);
+
+ GLint textureWidth;
+ GLint textureHeight;
+
+ glGetTexLevelParameteriv(textureTarget, 0, GL_TEXTURE_WIDTH, &textureWidth);
+ glGetTexLevelParameteriv(textureTarget, 0, GL_TEXTURE_HEIGHT, &textureHeight);
+
+ if (d_ptr->active_engine &&
+ d_ptr->active_engine->type() == QPaintEngine::OpenGL2) {
+ QGL2PaintEngineEx *eng = static_cast<QGL2PaintEngineEx*>(d_ptr->active_engine);
+ if (!eng->isNativePaintingActive()) {
+ QRectF dest(point, QSizeF(textureWidth, textureHeight));
+ QRectF src(0, 0, textureWidth, textureHeight);
+ QSize size(textureWidth, textureHeight);
+ if (eng->drawTexture(dest, textureId, size, src))
+ return;
+ }
+ }
+
+ qDrawTextureRect(QRectF(point, QSizeF(textureWidth, textureHeight)), textureWidth, textureHeight, textureTarget);
+
+ if (!wasEnabled)
+ glDisable(textureTarget);
+ glBindTexture(textureTarget, oldTexture);
+#endif
+}
+
+#ifdef Q_MAC_COMPAT_GL_FUNCTIONS
+/*! \internal */
+void QGLContext::drawTexture(const QPointF &point, QMacCompatGLuint textureId, QMacCompatGLenum textureTarget)
+{
+ drawTexture(point, GLuint(textureId), GLenum(textureTarget));
+}
+#endif
+
+
+/*!
+ This function sets the limit for the texture cache to \a size,
+ expressed in kilobytes.
+
+ By default, the cache limit is approximately 64 MB.
+
+ \sa textureCacheLimit()
+*/
+void QGLContext::setTextureCacheLimit(int size)
+{
+ QGLTextureCache::instance()->setMaxCost(size);
+}
+
+/*!
+ Returns the current texture cache limit in kilobytes.
+
+ \sa setTextureCacheLimit()
+*/
+int QGLContext::textureCacheLimit()
+{
+ return QGLTextureCache::instance()->maxCost();
+}
+
+
+/*!
+ \fn QGLFormat QGLContext::format() const
+
+ Returns the frame buffer format that was obtained (this may be a
+ subset of what was requested).
+
+ \sa requestedFormat()
+*/
+
+/*!
+ \fn QGLFormat QGLContext::requestedFormat() const
+
+ Returns the frame buffer format that was originally requested in
+ the constructor or setFormat().
+
+ \sa format()
+*/
+
+/*!
+ Sets a \a format for this context. The context is \link reset()
+ reset\endlink.
+
+ Call create() to create a new GL context that tries to match the
+ new format.
+
+ \snippet doc/src/snippets/code/src_opengl_qgl.cpp 7
+
+ \sa format(), reset(), create()
+*/
+
+void QGLContext::setFormat(const QGLFormat &format)
+{
+ Q_D(QGLContext);
+ reset();
+ d->glFormat = d->reqFormat = format;
+}
+
+/*!
+ \internal
+*/
+void QGLContext::setDevice(QPaintDevice *pDev)
+{
+ Q_D(QGLContext);
+ if (isValid())
+ reset();
+ d->paintDevice = pDev;
+ if (d->paintDevice && (d->paintDevice->devType() != QInternal::Widget
+ && d->paintDevice->devType() != QInternal::Pixmap
+ && d->paintDevice->devType() != QInternal::Pbuffer)) {
+ qWarning("QGLContext: Unsupported paint device type");
+ }
+}
+
+/*!
+ \fn bool QGLContext::isValid() const
+
+ Returns true if a GL rendering context has been successfully
+ created; otherwise returns false.
+*/
+
+/*!
+ \fn void QGLContext::setValid(bool valid)
+ \internal
+
+ Forces the GL rendering context to be valid.
+*/
+
+/*!
+ \fn bool QGLContext::isSharing() const
+
+ Returns true if this context is sharing its GL context with
+ another QGLContext, otherwise false is returned. Note that context
+ sharing might not be supported between contexts with different
+ formats.
+*/
+
+/*!
+ Returns true if \a context1 and \a context2 are sharing their
+ GL resources such as textures, shader programs, etc;
+ otherwise returns false.
+
+ \since 4.6
+*/
+bool QGLContext::areSharing(const QGLContext *context1, const QGLContext *context2)
+{
+ if (!context1 || !context2)
+ return false;
+ return context1->d_ptr->group == context2->d_ptr->group;
+}
+
+/*!
+ \fn bool QGLContext::deviceIsPixmap() const
+
+ Returns true if the paint device of this context is a pixmap;
+ otherwise returns false.
+*/
+
+/*!
+ \fn bool QGLContext::windowCreated() const
+
+ Returns true if a window has been created for this context;
+ otherwise returns false.
+
+ \sa setWindowCreated()
+*/
+
+/*!
+ \fn void QGLContext::setWindowCreated(bool on)
+
+ If \a on is true the context has had a window created for it. If
+ \a on is false no window has been created for the context.
+
+ \sa windowCreated()
+*/
+
+/*!
+ \fn uint QGLContext::colorIndex(const QColor& c) const
+
+ \internal
+
+ Returns a colormap index for the color c, in ColorIndex mode. Used
+ by qglColor() and qglClearColor().
+*/
+
+
+/*!
+ \fn bool QGLContext::initialized() const
+
+ Returns true if this context has been initialized, i.e. if
+ QGLWidget::initializeGL() has been performed on it; otherwise
+ returns false.
+
+ \sa setInitialized()
+*/
+
+/*!
+ \fn void QGLContext::setInitialized(bool on)
+
+ If \a on is true the context has been initialized, i.e.
+ QGLContext::setInitialized() has been called on it. If \a on is
+ false the context has not been initialized.
+
+ \sa initialized()
+*/
+
+/*!
+ \fn const QGLContext* QGLContext::currentContext()
+
+ Returns the current context, i.e. the context to which any OpenGL
+ commands will currently be directed. Returns 0 if no context is
+ current.
+
+ \sa makeCurrent()
+*/
+
+/*!
+ \fn QColor QGLContext::overlayTransparentColor() const
+
+ If this context is a valid context in an overlay plane, returns
+ the plane's transparent color. Otherwise returns an \link
+ QColor::isValid() invalid \endlink color.
+
+ The returned color's \link QColor::pixel() pixel \endlink value is
+ the index of the transparent color in the colormap of the overlay
+ plane. (Naturally, the color's RGB values are meaningless.)
+
+ The returned QColor object will generally work as expected only
+ when passed as the argument to QGLWidget::qglColor() or
+ QGLWidget::qglClearColor(). Under certain circumstances it can
+ also be used to draw transparent graphics with a QPainter. See the
+ examples/opengl/overlay_x11 example for details.
+*/
+
+
+/*!
+ Creates the GL context. Returns true if it was successful in
+ creating a valid GL rendering context on the paint device
+ specified in the constructor; otherwise returns false (i.e. the
+ context is invalid).
+
+ After successful creation, format() returns the set of features of
+ the created GL rendering context.
+
+ If \a shareContext points to a valid QGLContext, this method will
+ try to establish OpenGL display list and texture object sharing
+ between this context and the \a shareContext. Note that this may
+ fail if the two contexts have different \l {format()} {formats}.
+ Use isSharing() to see if sharing is in effect.
+
+ \warning Implementation note: initialization of C++ class
+ members usually takes place in the class constructor. QGLContext
+ is an exception because it must be simple to customize. The
+ virtual functions chooseContext() (and chooseVisual() for X11) can
+ be reimplemented in a subclass to select a particular context. The
+ problem is that virtual functions are not properly called during
+ construction (even though this is correct C++) because C++
+ constructs class hierarchies from the bottom up. For this reason
+ we need a create() function.
+
+ \sa chooseContext(), format(), isValid()
+*/
+
+bool QGLContext::create(const QGLContext* shareContext)
+{
+ Q_D(QGLContext);
+#ifdef Q_WS_QPA
+ if (!d->paintDevice && !d->platformContext)
+#else
+ if (!d->paintDevice)
+#endif
+ return false;
+
+ reset();
+ d->valid = chooseContext(shareContext);
+ if (d->valid && d->paintDevice && d->paintDevice->devType() == QInternal::Widget) {
+ QWidgetPrivate *wd = qt_widget_private(static_cast<QWidget *>(d->paintDevice));
+ wd->usesDoubleBufferedGLContext = d->glFormat.doubleBuffer();
+ }
+#ifndef Q_WS_QPA //We do this in choose context->setupSharing()
+ if (d->sharing) // ok, we managed to share
+ QGLContextGroup::addShare(this, shareContext);
+#endif
+ return d->valid;
+}
+
+bool QGLContext::isValid() const
+{
+ Q_D(const QGLContext);
+ return d->valid;
+}
+
+void QGLContext::setValid(bool valid)
+{
+ Q_D(QGLContext);
+ d->valid = valid;
+}
+
+bool QGLContext::isSharing() const
+{
+ Q_D(const QGLContext);
+ return d->group->isSharing();
+}
+
+QGLFormat QGLContext::format() const
+{
+ Q_D(const QGLContext);
+ return d->glFormat;
+}
+
+QGLFormat QGLContext::requestedFormat() const
+{
+ Q_D(const QGLContext);
+ return d->reqFormat;
+}
+
+ QPaintDevice* QGLContext::device() const
+{
+ Q_D(const QGLContext);
+ return d->paintDevice;
+}
+
+bool QGLContext::deviceIsPixmap() const
+{
+ Q_D(const QGLContext);
+ return d->paintDevice->devType() == QInternal::Pixmap;
+}
+
+
+bool QGLContext::windowCreated() const
+{
+ Q_D(const QGLContext);
+ return d->crWin;
+}
+
+
+void QGLContext::setWindowCreated(bool on)
+{
+ Q_D(QGLContext);
+ d->crWin = on;
+}
+
+bool QGLContext::initialized() const
+{
+ Q_D(const QGLContext);
+ return d->initDone;
+}
+
+void QGLContext::setInitialized(bool on)
+{
+ Q_D(QGLContext);
+ d->initDone = on;
+}
+
+const QGLContext* QGLContext::currentContext()
+{
+#ifdef Q_WS_QPA
+ if (const QPlatformGLContext *threadContext = QPlatformGLContext::currentContext()) {
+ return QGLContext::fromPlatformGLContext(const_cast<QPlatformGLContext *>(threadContext));
+ }
+ return 0;
+#else
+ QGLThreadContext *threadContext = qgl_context_storage.localData();
+ if (threadContext)
+ return threadContext->context;
+ return 0;
+#endif //Q_WS_QPA
+}
+
+void QGLContextPrivate::setCurrentContext(QGLContext *context)
+{
+#ifdef Q_WS_QPA
+ Q_UNUSED(context);
+#else
+ QGLThreadContext *threadContext = qgl_context_storage.localData();
+ if (!threadContext) {
+ if (!QThread::currentThread()) {
+ // We don't have a current QThread, so just set the static.
+ QGLContext::currentCtx = context;
+ return;
+ }
+ threadContext = new QGLThreadContext;
+ qgl_context_storage.setLocalData(threadContext);
+ }
+ threadContext->context = context;
+ QGLContext::currentCtx = context; // XXX: backwards-compat, not thread-safe
+#endif
+}
+
+/*!
+ \fn bool QGLContext::chooseContext(const QGLContext* shareContext = 0)
+
+ This semi-internal function is called by create(). It creates a
+ system-dependent OpenGL handle that matches the format() of \a
+ shareContext as closely as possible, returning true if successful
+ or false if a suitable handle could not be found.
+
+ On Windows, it calls the virtual function choosePixelFormat(),
+ which finds a matching pixel format identifier. On X11, it calls
+ the virtual function chooseVisual() which finds an appropriate X
+ visual. On other platforms it may work differently.
+*/
+
+/*! \fn int QGLContext::choosePixelFormat(void* dummyPfd, HDC pdc)
+
+ \bold{Win32 only:} This virtual function chooses a pixel format
+ that matches the OpenGL \link setFormat() format\endlink.
+ Reimplement this function in a subclass if you need a custom
+ context.
+
+ \warning The \a dummyPfd pointer and \a pdc are used as a \c
+ PIXELFORMATDESCRIPTOR*. We use \c void to avoid using
+ Windows-specific types in our header files.
+
+ \sa chooseContext()
+*/
+
+/*! \fn void *QGLContext::chooseVisual()
+
+ \bold{X11 only:} This virtual function tries to find a visual that
+ matches the format, reducing the demands if the original request
+ cannot be met.
+
+ The algorithm for reducing the demands of the format is quite
+ simple-minded, so override this method in your subclass if your
+ application has spcific requirements on visual selection.
+
+ \sa chooseContext()
+*/
+
+/*! \fn void *QGLContext::tryVisual(const QGLFormat& f, int bufDepth)
+ \internal
+
+ \bold{X11 only:} This virtual function chooses a visual that matches
+ the OpenGL \link format() format\endlink. Reimplement this function
+ in a subclass if you need a custom visual.
+
+ \sa chooseContext()
+*/
+
+/*!
+ \fn void QGLContext::reset()
+
+ Resets the context and makes it invalid.
+
+ \sa create(), isValid()
+*/
+
+
+/*!
+ \fn void QGLContext::makeCurrent()
+
+ Makes this context the current OpenGL rendering context. All GL
+ functions you call operate on this context until another context
+ is made current.
+
+ In some very rare cases the underlying call may fail. If this
+ occurs an error message is output to stderr.
+*/
+
+
+/*!
+ \fn void QGLContext::swapBuffers() const
+
+ Swaps the screen contents with an off-screen buffer. Only works if
+ the context is in double buffer mode.
+
+ \sa QGLFormat::setDoubleBuffer()
+*/
+
+
+/*!
+ \fn void QGLContext::doneCurrent()
+
+ Makes no GL context the current context. Normally, you do not need
+ to call this function; QGLContext calls it as necessary.
+*/
+
+
+/*!
+ \fn QPaintDevice* QGLContext::device() const
+
+ Returns the paint device set for this context.
+
+ \sa QGLContext::QGLContext()
+*/
+
+/*!
+ \obsolete
+ \fn void QGLContext::generateFontDisplayLists(const QFont& font, int listBase)
+
+ Generates a set of 256 display lists for the 256 first characters
+ in the font \a font. The first list will start at index \a listBase.
+
+ \sa QGLWidget::renderText()
+*/
+
+
+
+/*****************************************************************************
+ QGLWidget implementation
+ *****************************************************************************/
+
+
+/*!
+ \class QGLWidget
+ \brief The QGLWidget class is a widget for rendering OpenGL graphics.
+
+ \ingroup painting-3D
+
+
+ QGLWidget provides functionality for displaying OpenGL graphics
+ integrated into a Qt application. It is very simple to use. You
+ inherit from it and use the subclass like any other QWidget,
+ except that you have the choice between using QPainter and
+ standard OpenGL rendering commands.
+
+ QGLWidget provides three convenient virtual functions that you can
+ reimplement in your subclass to perform the typical OpenGL tasks:
+
+ \list
+ \i paintGL() - Renders the OpenGL scene. Gets called whenever the widget
+ needs to be updated.
+ \i resizeGL() - Sets up the OpenGL viewport, projection, etc. Gets
+ called whenever the widget has been resized (and also when it
+ is shown for the first time because all newly created widgets get a
+ resize event automatically).
+ \i initializeGL() - Sets up the OpenGL rendering context, defines display
+ lists, etc. Gets called once before the first time resizeGL() or
+ paintGL() is called.
+ \endlist
+
+ Here is a rough outline of how a QGLWidget subclass might look:
+
+ \snippet doc/src/snippets/code/src_opengl_qgl.cpp 8
+
+ If you need to trigger a repaint from places other than paintGL()
+ (a typical example is when using \link QTimer timers\endlink to
+ animate scenes), you should call the widget's updateGL() function.
+
+ Your widget's OpenGL rendering context is made current when
+ paintGL(), resizeGL(), or initializeGL() is called. If you need to
+ call the standard OpenGL API functions from other places (e.g. in
+ your widget's constructor or in your own paint functions), you
+ must call makeCurrent() first.
+
+ QGLWidget provides functions for requesting a new display \link
+ QGLFormat format\endlink and you can also create widgets with
+ customized rendering \link QGLContext contexts\endlink.
+
+ You can also share OpenGL display lists between QGLWidget objects (see
+ the documentation of the QGLWidget constructors for details).
+
+ Note that under Windows, the QGLContext belonging to a QGLWidget
+ has to be recreated when the QGLWidget is reparented. This is
+ necessary due to limitations on the Windows platform. This will
+ most likely cause problems for users that have subclassed and
+ installed their own QGLContext on a QGLWidget. It is possible to
+ work around this issue by putting the QGLWidget inside a dummy
+ widget and then reparenting the dummy widget, instead of the
+ QGLWidget. This will side-step the issue altogether, and is what
+ we recommend for users that need this kind of functionality.
+
+ On Mac OS X, when Qt is built with Cocoa support, a QGLWidget
+ can't have any sibling widgets placed ontop of itself. This is due
+ to limitations in the Cocoa API and is not supported by Apple.
+
+ \section1 Overlays
+
+ The QGLWidget creates a GL overlay context in addition to the
+ normal context if overlays are supported by the underlying system.
+
+ If you want to use overlays, you specify it in the \link QGLFormat
+ format\endlink. (Note: Overlay must be requested in the format
+ passed to the QGLWidget constructor.) Your GL widget should also
+ implement some or all of these virtual methods:
+
+ \list
+ \i paintOverlayGL()
+ \i resizeOverlayGL()
+ \i initializeOverlayGL()
+ \endlist
+
+ These methods work in the same way as the normal paintGL() etc.
+ functions, except that they will be called when the overlay
+ context is made current. You can explicitly make the overlay
+ context current by using makeOverlayCurrent(), and you can access
+ the overlay context directly (e.g. to ask for its transparent
+ color) by calling overlayContext().
+
+ On X servers in which the default visual is in an overlay plane,
+ non-GL Qt windows can also be used for overlays.
+
+ \section1 Painting Techniques
+
+ As described above, subclass QGLWidget to render pure 3D content in the
+ following way:
+
+ \list
+ \o Reimplement the QGLWidget::initializeGL() and QGLWidget::resizeGL() to
+ set up the OpenGL state and provide a perspective transformation.
+ \o Reimplement QGLWidget::paintGL() to paint the 3D scene, calling only
+ OpenGL functions to draw on the widget.
+ \endlist
+
+ It is also possible to draw 2D graphics onto a QGLWidget subclass, it is necessary
+ to reimplement QGLWidget::paintEvent() and do the following:
+
+ \list
+ \o Construct a QPainter object.
+ \o Initialize it for use on the widget with the QPainter::begin() function.
+ \o Draw primitives using QPainter's member functions.
+ \o Call QPainter::end() to finish painting.
+ \endlist
+
+ Overpainting 2D content on top of 3D content takes a little more effort.
+ One approach to doing this is shown in the
+ \l{Overpainting Example}{Overpainting} example.
+
+ \section1 Threading
+
+ As of Qt version 4.8, support for doing threaded GL rendering has
+ been improved. There are three scenarios that we currently support:
+ \list
+ \o 1. Buffer swapping in a thread.
+
+ Swapping buffers in a double buffered context may be a
+ synchronous, locking call that may be a costly operation in some
+ GL implementations. Especially so on embedded devices. It's not
+ optimal to have the CPU idling while the GPU is doing a buffer
+ swap. In those cases it is possible to do the rendering in the
+ main thread and do the actual buffer swap in a separate
+ thread. This can be done with the following steps:
+
+ 1. Call doneCurrent() in the main thread when the rendering is
+ finished.
+
+ 2. Notify the swapping thread that it can grab the context.
+
+ 3. Make the rendering context current in the swapping thread with
+ makeCurrent() and then call swapBuffers().
+
+ 4. Call doneCurrent() in the swapping thread and notify the main
+ thread that swapping is done.
+
+ Doing this will free up the main thread so that it can continue
+ with, for example, handling UI events or network requests. Even if
+ there is a context swap involved, it may be preferable compared to
+ having the main thread wait while the GPU finishes the swap
+ operation. Note that this is highly implementation dependent.
+
+ \o 2. Texture uploading in a thread.
+
+ Doing texture uploads in a thread may be very useful for
+ applications handling large amounts of images that needs to be
+ displayed, like for instance a photo gallery application. This is
+ supported in Qt through the existing bindTexture() API. A simple
+ way of doing this is to create two sharing QGLWidgets. One is made
+ current in the main GUI thread, while the other is made current in
+ the texture upload thread. The widget in the uploading thread is
+ never shown, it is only used for sharing textures with the main
+ thread. For each texture that is bound via bindTexture(), notify
+ the main thread so that it can start using the texture.
+
+ \o 3. Using QPainter to draw into a QGLWidget in a thread.
+
+ In Qt 4.8, it is possible to draw into a QGLWidget using a
+ QPainter in a separate thread. Note that this is also possible for
+ QGLPixelBuffers and QGLFramebufferObjects. Since this is only
+ supported in the GL 2 paint engine, OpenGL 2.0 or OpenGL ES 2.0 is
+ required.
+
+ QGLWidgets can only be created in the main GUI thread. This means
+ a call to doneCurrent() is necessary to release the GL context
+ from the main thread, before the widget can be drawn into by
+ another thread. Also, the main GUI thread will dispatch resize and
+ paint events to a QGLWidget when the widget is resized, or parts
+ of it becomes exposed or needs redrawing. It is therefore
+ necessary to handle those events because the default
+ implementations inside QGLWidget will try to make the QGLWidget's
+ context current, which again will interfere with any threads
+ rendering into the widget. Reimplement QGLWidget::paintEvent() and
+ QGLWidget::resizeEvent() to notify the rendering thread that a
+ resize or update is necessary, and be careful not to call the base
+ class implementation. If you are rendering an animation, it might
+ not be necessary to handle the paint event at all since the
+ rendering thread is doing regular updates. Then it would be enough
+ to reimplement QGLWidget::paintEvent() to do nothing.
+
+ \endlist
+
+ As a general rule when doing threaded rendering: be aware that
+ binding and releasing contexts in different threads have to be
+ synchronized by the user. A GL rendering context can only be
+ current in one thread at any time. If you try to open a QPainter
+ on a QGLWidget and the widget's rendering context is current in
+ another thread, it will fail.
+
+ Note that under X11 it is necessary to set the
+ Qt::AA_X11InitThreads application attribute to make the X11
+ library and GLX calls thread safe, otherwise the above scenarios
+ will fail.
+
+ In addition to this, rendering using raw GL calls in a separate
+ thread is supported.
+
+ \e{OpenGL is a trademark of Silicon Graphics, Inc. in the United States and other
+ countries.}
+
+ \sa QGLPixelBuffer, {Hello GL Example}, {2D Painting Example}, {Overpainting Example},
+ {Grabber Example}
+*/
+
+/*!
+ Constructs an OpenGL widget with a \a parent widget.
+
+ The \link QGLFormat::defaultFormat() default format\endlink is
+ used. The widget will be \link isValid() invalid\endlink if the
+ system has no \link QGLFormat::hasOpenGL() OpenGL support\endlink.
+
+ The \a parent and widget flag, \a f, arguments are passed
+ to the QWidget constructor.
+
+ If \a shareWidget is a valid QGLWidget, this widget will share
+ OpenGL display lists and texture objects with \a shareWidget. But
+ if \a shareWidget and this widget have different \l {format()}
+ {formats}, sharing might not be possible. You can check whether
+ sharing is in effect by calling isSharing().
+
+ The initialization of OpenGL rendering state, etc. should be done
+ by overriding the initializeGL() function, rather than in the
+ constructor of your QGLWidget subclass.
+
+ \sa QGLFormat::defaultFormat(), {Textures Example}
+*/
+
+QGLWidget::QGLWidget(QWidget *parent, const QGLWidget* shareWidget, Qt::WindowFlags f)
+ : QWidget(*(new QGLWidgetPrivate), parent, f | Qt::MSWindowsOwnDC)
+{
+ Q_D(QGLWidget);
+ setAttribute(Qt::WA_PaintOnScreen);
+ setAttribute(Qt::WA_NoSystemBackground);
+ setAutoFillBackground(true); // for compatibility
+ d->init(new QGLContext(QGLFormat::defaultFormat(), this), shareWidget);
+}
+
+
+/*!
+ Constructs an OpenGL widget with parent \a parent.
+
+ The \a format argument specifies the desired \link QGLFormat
+ rendering options \endlink. If the underlying OpenGL/Window system
+ cannot satisfy all the features requested in \a format, the
+ nearest subset of features will be used. After creation, the
+ format() method will return the actual format obtained.
+
+ The widget will be \link isValid() invalid\endlink if the system
+ has no \link QGLFormat::hasOpenGL() OpenGL support\endlink.
+
+ The \a parent and widget flag, \a f, arguments are passed
+ to the QWidget constructor.
+
+ If \a shareWidget is a valid QGLWidget, this widget will share
+ OpenGL display lists and texture objects with \a shareWidget. But
+ if \a shareWidget and this widget have different \l {format()}
+ {formats}, sharing might not be possible. You can check whether
+ sharing is in effect by calling isSharing().
+
+ The initialization of OpenGL rendering state, etc. should be done
+ by overriding the initializeGL() function, rather than in the
+ constructor of your QGLWidget subclass.
+
+ \sa QGLFormat::defaultFormat(), isValid()
+*/
+
+QGLWidget::QGLWidget(const QGLFormat &format, QWidget *parent, const QGLWidget* shareWidget,
+ Qt::WindowFlags f)
+ : QWidget(*(new QGLWidgetPrivate), parent, f | Qt::MSWindowsOwnDC)
+{
+ Q_D(QGLWidget);
+ setAttribute(Qt::WA_PaintOnScreen);
+ setAttribute(Qt::WA_NoSystemBackground);
+ setAutoFillBackground(true); // for compatibility
+ d->init(new QGLContext(format, this), shareWidget);
+}
+
+/*!
+ Constructs an OpenGL widget with parent \a parent.
+
+ The \a context argument is a pointer to the QGLContext that
+ you wish to be bound to this widget. This allows you to pass in
+ your own QGLContext sub-classes.
+
+ The widget will be \link isValid() invalid\endlink if the system
+ has no \link QGLFormat::hasOpenGL() OpenGL support\endlink.
+
+ The \a parent and widget flag, \a f, arguments are passed
+ to the QWidget constructor.
+
+ If \a shareWidget is a valid QGLWidget, this widget will share
+ OpenGL display lists and texture objects with \a shareWidget. But
+ if \a shareWidget and this widget have different \l {format()}
+ {formats}, sharing might not be possible. You can check whether
+ sharing is in effect by calling isSharing().
+
+ The initialization of OpenGL rendering state, etc. should be done
+ by overriding the initializeGL() function, rather than in the
+ constructor of your QGLWidget subclass.
+
+ \sa QGLFormat::defaultFormat(), isValid()
+*/
+QGLWidget::QGLWidget(QGLContext *context, QWidget *parent, const QGLWidget *shareWidget,
+ Qt::WindowFlags f)
+ : QWidget(*(new QGLWidgetPrivate), parent, f | Qt::MSWindowsOwnDC)
+{
+ Q_D(QGLWidget);
+ setAttribute(Qt::WA_PaintOnScreen);
+ setAttribute(Qt::WA_NoSystemBackground);
+ setAutoFillBackground(true); // for compatibility
+ d->init(context, shareWidget);
+}
+
+/*!
+ Destroys the widget.
+*/
+
+QGLWidget::~QGLWidget()
+{
+ Q_D(QGLWidget);
+#if defined(GLX_MESA_release_buffers) && defined(QGL_USE_MESA_EXT)
+ bool doRelease = (glcx && glcx->windowCreated());
+#endif
+ delete d->glcx;
+ d->glcx = 0;
+#if defined(Q_WS_WIN)
+ delete d->olcx;
+ d->olcx = 0;
+#endif
+#if defined(GLX_MESA_release_buffers) && defined(QGL_USE_MESA_EXT)
+ if (doRelease)
+ glXReleaseBuffersMESA(x11Display(), winId());
+#endif
+ d->cleanupColormaps();
+
+#ifdef Q_WS_MAC
+ QWidget *current = parentWidget();
+ while (current) {
+ qt_widget_private(current)->glWidgets.removeAll(QWidgetPrivate::GlWidgetInfo(this));
+ if (current->isWindow())
+ break;
+ current = current->parentWidget();
+ };
+#endif
+}
+
+/*!
+ \fn QGLFormat QGLWidget::format() const
+
+ Returns the format of the contained GL rendering context.
+*/
+
+/*!
+ \fn bool QGLWidget::doubleBuffer() const
+
+ Returns true if the contained GL rendering context has double
+ buffering; otherwise returns false.
+
+ \sa QGLFormat::doubleBuffer()
+*/
+
+/*!
+ \fn void QGLWidget::setAutoBufferSwap(bool on)
+
+ If \a on is true automatic GL buffer swapping is switched on;
+ otherwise it is switched off.
+
+ If \a on is true and the widget is using a double-buffered format,
+ the background and foreground GL buffers will automatically be
+ swapped after each paintGL() call.
+
+ The buffer auto-swapping is on by default.
+
+ \sa autoBufferSwap(), doubleBuffer(), swapBuffers()
+*/
+
+/*!
+ \fn bool QGLWidget::autoBufferSwap() const
+
+ Returns true if the widget is doing automatic GL buffer swapping;
+ otherwise returns false.
+
+ \sa setAutoBufferSwap()
+*/
+
+/*!
+ \fn void *QGLContext::getProcAddress(const QString &proc) const
+
+ Returns a function pointer to the GL extension function passed in
+ \a proc. 0 is returned if a pointer to the function could not be
+ obtained.
+*/
+
+/*!
+ \fn bool QGLWidget::isValid() const
+
+ Returns true if the widget has a valid GL rendering context;
+ otherwise returns false. A widget will be invalid if the system
+ has no \link QGLFormat::hasOpenGL() OpenGL support\endlink.
+*/
+
+bool QGLWidget::isValid() const
+{
+ Q_D(const QGLWidget);
+ return d->glcx && d->glcx->isValid();
+}
+
+/*!
+ \fn bool QGLWidget::isSharing() const
+
+ Returns true if this widget's GL context is shared with another GL
+ context, otherwise false is returned. Context sharing might not be
+ possible if the widgets use different formats.
+
+ \sa format()
+*/
+
+bool QGLWidget::isSharing() const
+{
+ Q_D(const QGLWidget);
+ return d->glcx->isSharing();
+}
+
+/*!
+ \fn void QGLWidget::makeCurrent()
+
+ Makes this widget the current widget for OpenGL operations, i.e.
+ makes the widget's rendering context the current OpenGL rendering
+ context.
+*/
+
+void QGLWidget::makeCurrent()
+{
+ Q_D(QGLWidget);
+ d->glcx->makeCurrent();
+}
+
+/*!
+ \fn void QGLWidget::doneCurrent()
+
+ Makes no GL context the current context. Normally, you do not need
+ to call this function; QGLContext calls it as necessary. However,
+ it may be useful in multithreaded environments.
+*/
+
+void QGLWidget::doneCurrent()
+{
+ Q_D(QGLWidget);
+ d->glcx->doneCurrent();
+}
+
+/*!
+ \fn void QGLWidget::swapBuffers()
+
+ Swaps the screen contents with an off-screen buffer. This only
+ works if the widget's format specifies double buffer mode.
+
+ Normally, there is no need to explicitly call this function
+ because it is done automatically after each widget repaint, i.e.
+ each time after paintGL() has been executed.
+
+ \sa doubleBuffer(), setAutoBufferSwap(), QGLFormat::setDoubleBuffer()
+*/
+
+void QGLWidget::swapBuffers()
+{
+ Q_D(QGLWidget);
+ d->glcx->swapBuffers();
+}
+
+
+/*!
+ \fn const QGLContext* QGLWidget::overlayContext() const
+
+ Returns the overlay context of this widget, or 0 if this widget
+ has no overlay.
+
+ \sa context()
+*/
+
+
+
+/*!
+ \fn void QGLWidget::makeOverlayCurrent()
+
+ Makes the overlay context of this widget current. Use this if you
+ need to issue OpenGL commands to the overlay context outside of
+ initializeOverlayGL(), resizeOverlayGL(), and paintOverlayGL().
+
+ Does nothing if this widget has no overlay.
+
+ \sa makeCurrent()
+*/
+
+
+/*!
+ \obsolete
+
+ Sets a new format for this widget.
+
+ If the underlying OpenGL/Window system cannot satisfy all the
+ features requested in \a format, the nearest subset of features will
+ be used. After creation, the format() method will return the actual
+ rendering context format obtained.
+
+ The widget will be assigned a new QGLContext, and the initializeGL()
+ function will be executed for this new context before the first
+ resizeGL() or paintGL().
+
+ This method will try to keep display list and texture object sharing
+ in effect with other QGLWidget objects, but changing the format might make
+ sharing impossible. Use isSharing() to see if sharing is still in
+ effect.
+
+ \sa format(), isSharing(), isValid()
+*/
+
+void QGLWidget::setFormat(const QGLFormat &format)
+{
+ setContext(new QGLContext(format,this));
+}
+
+
+
+
+/*!
+ \fn const QGLContext *QGLWidget::context() const
+
+ Returns the context of this widget.
+
+ It is possible that the context is not valid (see isValid()), for
+ example, if the underlying hardware does not support the format
+ attributes that were requested.
+*/
+
+/*
+ \fn void QGLWidget::setContext(QGLContext *context,
+ const QGLContext* shareContext,
+ bool deleteOldContext)
+ \obsolete
+
+ Sets a new context for this widget. The QGLContext \a context must
+ be created using \e new. QGLWidget will delete \a context when
+ another context is set or when the widget is destroyed.
+
+ If \a context is invalid, QGLContext::create() is performed on
+ it. The initializeGL() function will then be executed for the new
+ context before the first resizeGL() or paintGL().
+
+ If \a context is invalid, this method will try to keep display list
+ and texture object sharing in effect, or (if \a shareContext points
+ to a valid context) start display list and texture object sharing
+ with that context, but sharing might be impossible if the two
+ contexts have different \l {format()} {formats}. Use isSharing() to
+ see whether sharing is in effect.
+
+ If \a deleteOldContext is true (the default), the existing context
+ will be deleted. You may use false here if you have kept a pointer
+ to the old context (as returned by context()), and want to restore
+ that context later.
+
+ \sa context(), isSharing()
+*/
+
+
+
+/*!
+ \fn void QGLWidget::updateGL()
+
+ Updates the widget by calling glDraw().
+*/
+
+void QGLWidget::updateGL()
+{
+ if (updatesEnabled())
+ glDraw();
+}
+
+
+/*!
+ \fn void QGLWidget::updateOverlayGL()
+
+ Updates the widget's overlay (if any). Will cause the virtual
+ function paintOverlayGL() to be executed.
+
+ The widget's rendering context will become the current context and
+ initializeGL() will be called if it hasn't already been called.
+*/
+
+
+/*!
+ This virtual function is called once before the first call to
+ paintGL() or resizeGL(), and then once whenever the widget has
+ been assigned a new QGLContext. Reimplement it in a subclass.
+
+ This function should set up any required OpenGL context rendering
+ flags, defining display lists, etc.
+
+ There is no need to call makeCurrent() because this has already
+ been done when this function is called.
+*/
+
+void QGLWidget::initializeGL()
+{
+}
+
+
+/*!
+ This virtual function is called whenever the widget needs to be
+ painted. Reimplement it in a subclass.
+
+ There is no need to call makeCurrent() because this has already
+ been done when this function is called.
+*/
+
+void QGLWidget::paintGL()
+{
+}
+
+
+/*!
+ \fn void QGLWidget::resizeGL(int width , int height)
+
+ This virtual function is called whenever the widget has been
+ resized. The new size is passed in \a width and \a height.
+ Reimplement it in a subclass.
+
+ There is no need to call makeCurrent() because this has already
+ been done when this function is called.
+*/
+
+void QGLWidget::resizeGL(int, int)
+{
+}
+
+
+
+/*!
+ This virtual function is used in the same manner as initializeGL()
+ except that it operates on the widget's overlay context instead of
+ the widget's main context. This means that initializeOverlayGL()
+ is called once before the first call to paintOverlayGL() or
+ resizeOverlayGL(). Reimplement it in a subclass.
+
+ This function should set up any required OpenGL context rendering
+ flags, defining display lists, etc. for the overlay context.
+
+ There is no need to call makeOverlayCurrent() because this has
+ already been done when this function is called.
+*/
+
+void QGLWidget::initializeOverlayGL()
+{
+}
+
+
+/*!
+ This virtual function is used in the same manner as paintGL()
+ except that it operates on the widget's overlay context instead of
+ the widget's main context. This means that paintOverlayGL() is
+ called whenever the widget's overlay needs to be painted.
+ Reimplement it in a subclass.
+
+ There is no need to call makeOverlayCurrent() because this has
+ already been done when this function is called.
+*/
+
+void QGLWidget::paintOverlayGL()
+{
+}
+
+
+/*!
+ \fn void QGLWidget::resizeOverlayGL(int width , int height)
+
+ This virtual function is used in the same manner as paintGL()
+ except that it operates on the widget's overlay context instead of
+ the widget's main context. This means that resizeOverlayGL() is
+ called whenever the widget has been resized. The new size is
+ passed in \a width and \a height. Reimplement it in a subclass.
+
+ There is no need to call makeOverlayCurrent() because this has
+ already been done when this function is called.
+*/
+
+void QGLWidget::resizeOverlayGL(int, int)
+{
+}
+
+/*! \fn bool QGLWidget::event(QEvent *e)
+ \reimp
+*/
+#if !defined(Q_OS_WINCE) && !defined(Q_WS_QWS) && !defined(Q_WS_QPA)
+bool QGLWidget::event(QEvent *e)
+{
+ Q_D(QGLWidget);
+
+ if (e->type() == QEvent::Paint) {
+ QPoint offset;
+ QPaintDevice *redirectedDevice = d->redirected(&offset);
+ if (redirectedDevice && redirectedDevice->devType() == QInternal::Pixmap) {
+ d->restoreRedirected();
+ QPixmap pixmap = renderPixmap();
+ d->setRedirected(redirectedDevice, offset);
+ QPainter p(redirectedDevice);
+ p.drawPixmap(-offset, pixmap);
+ return true;
+ }
+ }
+
+#if defined(Q_WS_X11)
+ if (e->type() == QEvent::ParentChange) {
+ // if we've reparented a window that has the current context
+ // bound, we need to rebind that context to the new window id
+ if (d->glcx == QGLContext::currentContext())
+ makeCurrent();
+
+ if (d->glcx->d_func()->screen != d->xinfo.screen() || testAttribute(Qt::WA_TranslucentBackground)) {
+ setContext(new QGLContext(d->glcx->requestedFormat(), this));
+ // ### recreating the overlay isn't supported atm
+ }
+ }
+
+#ifndef QT_NO_EGL
+ // A re-parent is likely to destroy the X11 window and re-create it. It is important
+ // that we free the EGL surface _before_ the winID changes - otherwise we can leak.
+ if (e->type() == QEvent::ParentAboutToChange)
+ d->glcx->d_func()->destroyEglSurfaceForDevice();
+
+ if ((e->type() == QEvent::ParentChange) || (e->type() == QEvent::WindowStateChange)) {
+ // The window may have been re-created during re-parent or state change - if so, the EGL
+ // surface will need to be re-created.
+ d->recreateEglSurface();
+ }
+#endif
+#elif defined(Q_WS_WIN)
+ if (e->type() == QEvent::ParentChange) {
+ QGLContext *newContext = new QGLContext(d->glcx->requestedFormat(), this);
+ setContext(newContext, d->glcx);
+
+ // the overlay needs to be recreated as well
+ delete d->olcx;
+ if (isValid() && context()->format().hasOverlay()) {
+ d->olcx = new QGLContext(QGLFormat::defaultOverlayFormat(), this);
+ if (!d->olcx->create(isSharing() ? d->glcx : 0)) {
+ delete d->olcx;
+ d->olcx = 0;
+ d->glcx->d_func()->glFormat.setOverlay(false);
+ }
+ } else {
+ d->olcx = 0;
+ }
+ } else if (e->type() == QEvent::Show) {
+ if (!format().rgba())
+ d->updateColormap();
+ }
+#elif defined(Q_WS_MAC)
+ if (e->type() == QEvent::MacGLWindowChange
+#if 0 //(MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5)
+ && ((QSysInfo::MacintoshVersion >= QSysInfo::MV_10_5 && isWindow())
+ || QSysInfo::MacintoshVersion <= QSysInfo::MV_10_4)
+#endif
+ ) {
+ if (d->needWindowChange) {
+ d->needWindowChange = false;
+ d->glcx->updatePaintDevice();
+ update();
+ }
+ return true;
+# if defined(QT_MAC_USE_COCOA)
+ } else if (e->type() == QEvent::MacGLClearDrawable) {
+ d->glcx->d_ptr->clearDrawable();
+# endif
+ }
+#elif defined(Q_OS_SYMBIAN)
+ // prevents errors on some systems, where we get a flush to a
+ // hidden widget
+ if (e->type() == QEvent::Hide) {
+ makeCurrent();
+ glFinish();
+ doneCurrent();
+ } else if (e->type() == QEvent::ParentChange) {
+ // if we've reparented a window that has the current context
+ // bound, we need to rebind that context to the new window id
+ if (d->glcx == QGLContext::currentContext())
+ makeCurrent();
+
+ if (testAttribute(Qt::WA_TranslucentBackground))
+ setContext(new QGLContext(d->glcx->requestedFormat(), this));
+ }
+
+ // A re-parent is likely to destroy the Symbian window and re-create it. It is important
+ // that we free the EGL surface _before_ the winID changes - otherwise we can leak.
+ if (e->type() == QEvent::ParentAboutToChange)
+ d->glcx->d_func()->destroyEglSurfaceForDevice();
+
+ if ((e->type() == QEvent::ParentChange) || (e->type() == QEvent::WindowStateChange)) {
+ // The window may have been re-created during re-parent or state change - if so, the EGL
+ // surface will need to be re-created.
+ d->recreateEglSurface();
+ }
+
+#endif
+
+ return QWidget::event(e);
+}
+#endif
+
+/*!
+ \fn void QGLWidget::paintEvent(QPaintEvent *event)
+
+ Handles paint events passed in the \a event parameter. Will cause
+ the virtual paintGL() function to be called.
+
+ The widget's rendering context will become the current context and
+ initializeGL() will be called if it hasn't already been called.
+*/
+
+void QGLWidget::paintEvent(QPaintEvent *)
+{
+ if (updatesEnabled()) {
+ glDraw();
+ updateOverlayGL();
+ }
+}
+
+
+/*!
+ \fn void QGLWidget::resizeEvent(QResizeEvent *event)
+
+ Handles resize events that are passed in the \a event parameter.
+ Calls the virtual function resizeGL().
+*/
+
+
+/*!
+ \fn void QGLWidget::setMouseTracking(bool enable)
+
+ If \a enable is true then mouse tracking is enabled; otherwise it
+ is disabled.
+*/
+
+
+/*!
+ Renders the current scene on a pixmap and returns the pixmap.
+
+ You can use this method on both visible and invisible QGLWidget objects.
+
+ This method will create a pixmap and a temporary QGLContext to
+ render on the pixmap. It will then call initializeGL(),
+ resizeGL(), and paintGL() on this context. Finally, the widget's
+ original GL context is restored.
+
+ The size of the pixmap will be \a w pixels wide and \a h pixels
+ high unless one of these parameters is 0 (the default), in which
+ case the pixmap will have the same size as the widget.
+
+ If \a useContext is true, this method will try to be more
+ efficient by using the existing GL context to render the pixmap.
+ The default is false. Only use true if you understand the risks.
+ Note that under Windows a temporary context has to be created
+ and usage of the \e useContext parameter is not supported.
+
+ Overlays are not rendered onto the pixmap.
+
+ If the GL rendering context and the desktop have different bit
+ depths, the result will most likely look surprising.
+
+ Note that the creation of display lists, modifications of the view
+ frustum etc. should be done from within initializeGL(). If this is
+ not done, the temporary QGLContext will not be initialized
+ properly, and the rendered pixmap may be incomplete/corrupted.
+*/
+
+QPixmap QGLWidget::renderPixmap(int w, int h, bool useContext)
+{
+ Q_D(QGLWidget);
+ QSize sz = size();
+ if ((w > 0) && (h > 0))
+ sz = QSize(w, h);
+
+#if defined(Q_WS_X11)
+ extern int qt_x11_preferred_pixmap_depth;
+ int old_depth = qt_x11_preferred_pixmap_depth;
+ qt_x11_preferred_pixmap_depth = x11Info().depth();
+
+ QPixmapData *data = new QX11PixmapData(QPixmapData::PixmapType);
+ data->resize(sz.width(), sz.height());
+ QPixmap pm(data);
+ qt_x11_preferred_pixmap_depth = old_depth;
+ QX11Info xinfo = x11Info();
+
+ // make sure we use a pixmap with the same depth/visual as the widget
+ if (xinfo.visual() != QX11Info::appVisual()) {
+ QX11InfoData* xd = pm.x11Info().getX11Data(true);
+ xd->depth = xinfo.depth();
+ xd->visual = static_cast<Visual *>(xinfo.visual());
+ const_cast<QX11Info &>(pm.x11Info()).setX11Data(xd);
+ }
+
+#else
+ QPixmap pm(sz);
+#endif
+
+ d->glcx->doneCurrent();
+
+ bool success = true;
+
+ if (useContext && isValid() && d->renderCxPm(&pm))
+ return pm;
+
+ QGLFormat fmt = d->glcx->requestedFormat();
+ fmt.setDirectRendering(false); // Direct is unlikely to work
+ fmt.setDoubleBuffer(false); // We don't need dbl buf
+#ifdef Q_WS_MAC // crash prevention on the Mac - it's unlikely to work anyway
+ fmt.setSampleBuffers(false);
+#endif
+
+ QGLContext* ocx = d->glcx;
+ ocx->doneCurrent();
+ d->glcx = new QGLContext(fmt, &pm);
+ d->glcx->create();
+
+ if (d->glcx->isValid())
+ updateGL();
+ else
+ success = false;
+
+ delete d->glcx;
+ d->glcx = ocx;
+
+ ocx->makeCurrent();
+
+ if (success) {
+#if defined(Q_WS_X11)
+ if (xinfo.visual() != QX11Info::appVisual()) {
+ QImage image = pm.toImage();
+ QPixmap p = QPixmap::fromImage(image);
+ return p;
+ }
+#endif
+ return pm;
+ }
+ return QPixmap();
+}
+
+/*!
+ Returns an image of the frame buffer. If \a withAlpha is true the
+ alpha channel is included.
+
+ Depending on your hardware, you can explicitly select which color
+ buffer to grab with a glReadBuffer() call before calling this
+ function.
+*/
+QImage QGLWidget::grabFrameBuffer(bool withAlpha)
+{
+ makeCurrent();
+ QImage res;
+ int w = width();
+ int h = height();
+ if (format().rgba()) {
+ res = qt_gl_read_framebuffer(QSize(w, h), format().alpha(), withAlpha);
+ } else {
+#if defined (Q_WS_WIN) && !defined(QT_OPENGL_ES)
+ res = QImage(w, h, QImage::Format_Indexed8);
+ glReadPixels(0, 0, w, h, GL_COLOR_INDEX, GL_UNSIGNED_BYTE, res.bits());
+ const QVector<QColor> pal = QColormap::instance().colormap();
+ if (pal.size()) {
+ res.setColorCount(pal.size());
+ for (int i = 0; i < pal.size(); i++)
+ res.setColor(i, pal.at(i).rgb());
+ }
+ res = res.mirrored();
+#endif
+ }
+
+ return res;
+}
+
+
+
+/*!
+ Initializes OpenGL for this widget's context. Calls the virtual
+ function initializeGL().
+*/
+
+void QGLWidget::glInit()
+{
+ Q_D(QGLWidget);
+ if (!isValid())
+ return;
+ makeCurrent();
+ initializeGL();
+ d->glcx->setInitialized(true);
+}
+
+
+/*!
+ Executes the virtual function paintGL().
+
+ The widget's rendering context will become the current context and
+ initializeGL() will be called if it hasn't already been called.
+*/
+
+void QGLWidget::glDraw()
+{
+ Q_D(QGLWidget);
+ if (!isValid())
+ return;
+#ifdef Q_OS_SYMBIAN
+ // Crashes on Symbian if trying to render to invisible surfaces
+ if (!isVisible() && d->glcx->device()->devType() == QInternal::Widget)
+ return;
+#endif
+ makeCurrent();
+#ifndef QT_OPENGL_ES
+ if (d->glcx->deviceIsPixmap())
+ glDrawBuffer(GL_FRONT);
+#endif
+ if (!d->glcx->initialized()) {
+ glInit();
+ resizeGL(d->glcx->device()->width(), d->glcx->device()->height()); // New context needs this "resize"
+ }
+ paintGL();
+ if (doubleBuffer()) {
+ if (d->autoSwap)
+ swapBuffers();
+ } else {
+ glFlush();
+ }
+}
+
+/*!
+ Convenience function for specifying a drawing color to OpenGL.
+ Calls glColor4 (in RGBA mode) or glIndex (in color-index mode)
+ with the color \a c. Applies to this widgets GL context.
+
+ \note This function is not supported on OpenGL/ES 2.0 systems.
+
+ \sa qglClearColor(), QGLContext::currentContext(), QColor
+*/
+
+void QGLWidget::qglColor(const QColor& c) const
+{
+#if !defined(QT_OPENGL_ES_2)
+#ifdef QT_OPENGL_ES
+ glColor4f(c.redF(), c.greenF(), c.blueF(), c.alphaF());
+#else
+ Q_D(const QGLWidget);
+ const QGLContext *ctx = QGLContext::currentContext();
+ if (ctx) {
+ if (ctx->format().rgba())
+ glColor4f(c.redF(), c.greenF(), c.blueF(), c.alphaF());
+ else if (!d->cmap.isEmpty()) { // QGLColormap in use?
+ int i = d->cmap.find(c.rgb());
+ if (i < 0)
+ i = d->cmap.findNearest(c.rgb());
+ glIndexi(i);
+ } else
+ glIndexi(ctx->colorIndex(c));
+ }
+#endif //QT_OPENGL_ES
+#else
+ Q_UNUSED(c);
+#endif //QT_OPENGL_ES_2
+}
+
+/*!
+ Convenience function for specifying the clearing color to OpenGL.
+ Calls glClearColor (in RGBA mode) or glClearIndex (in color-index
+ mode) with the color \a c. Applies to this widgets GL context.
+
+ \sa qglColor(), QGLContext::currentContext(), QColor
+*/
+
+void QGLWidget::qglClearColor(const QColor& c) const
+{
+#ifdef QT_OPENGL_ES
+ glClearColor(c.redF(), c.greenF(), c.blueF(), c.alphaF());
+#else
+ Q_D(const QGLWidget);
+ const QGLContext *ctx = QGLContext::currentContext();
+ if (ctx) {
+ if (ctx->format().rgba())
+ glClearColor(c.redF(), c.greenF(), c.blueF(), c.alphaF());
+ else if (!d->cmap.isEmpty()) { // QGLColormap in use?
+ int i = d->cmap.find(c.rgb());
+ if (i < 0)
+ i = d->cmap.findNearest(c.rgb());
+ glClearIndex(i);
+ } else
+ glClearIndex(ctx->colorIndex(c));
+ }
+#endif
+}
+
+
+/*!
+ Converts the image \a img into the unnamed format expected by
+ OpenGL functions such as glTexImage2D(). The returned image is not
+ usable as a QImage, but QImage::width(), QImage::height() and
+ QImage::bits() may be used with OpenGL. The GL format used is
+ \c GL_RGBA.
+
+ \omit ###
+
+ \l opengl/texture example
+ The following few lines are from the texture example. Most of the
+ code is irrelevant, so we just quote the relevant bits:
+
+ \quotefromfile opengl/texture/gltexobj.cpp
+ \skipto tex1
+ \printline tex1
+ \printline gllogo.bmp
+
+ We create \e tex1 (and another variable) for OpenGL, and load a real
+ image into \e buf.
+
+ \skipto convertToGLFormat
+ \printline convertToGLFormat
+
+ A few lines later, we convert \e buf into OpenGL format and store it
+ in \e tex1.
+
+ \skipto glTexImage2D
+ \printline glTexImage2D
+ \printline tex1.bits
+
+ Note the dimension restrictions for texture images as described in
+ the glTexImage2D() documentation. The width must be 2^m + 2*border
+ and the height 2^n + 2*border where m and n are integers and
+ border is either 0 or 1.
+
+ Another function in the same example uses \e tex1 with OpenGL.
+
+ \endomit
+*/
+
+QImage QGLWidget::convertToGLFormat(const QImage& img)
+{
+ QImage res(img.size(), QImage::Format_ARGB32);
+ convertToGLFormatHelper(res, img.convertToFormat(QImage::Format_ARGB32), GL_RGBA);
+ return res;
+}
+
+
+/*!
+ \fn QGLColormap & QGLWidget::colormap() const
+
+ Returns the colormap for this widget.
+
+ Usually it is only top-level widgets that can have different
+ colormaps installed. Asking for the colormap of a child widget
+ will return the colormap for the child's top-level widget.
+
+ If no colormap has been set for this widget, the QGLColormap
+ returned will be empty.
+
+ \sa setColormap(), QGLColormap::isEmpty()
+*/
+
+/*!
+ \fn void QGLWidget::setColormap(const QGLColormap & cmap)
+
+ Set the colormap for this widget to \a cmap. Usually it is only
+ top-level widgets that can have colormaps installed.
+
+ \sa colormap()
+*/
+
+
+/*!
+ \obsolete
+
+ Returns the value of the first display list that is generated for
+ the characters in the given \a font. \a listBase indicates the base
+ value used when generating the display lists for the font. The
+ default value is 2000.
+
+ \note This function is not supported on OpenGL/ES systems.
+*/
+int QGLWidget::fontDisplayListBase(const QFont & font, int listBase)
+{
+#ifndef QT_OPENGL_ES
+ Q_D(QGLWidget);
+ int base;
+
+ if (!d->glcx) { // this can't happen unless we run out of mem
+ return 0;
+ }
+
+ // always regenerate font disp. lists for pixmaps - hw accelerated
+ // contexts can't handle this otherwise
+ bool regenerate = d->glcx->deviceIsPixmap();
+#ifndef QT_NO_FONTCONFIG
+ // font color needs to be part of the font cache key when using
+ // antialiased fonts since one set of glyphs needs to be generated
+ // for each font color
+ QString color_key;
+ if (font.styleStrategy() != QFont::NoAntialias) {
+ GLfloat color[4];
+ glGetFloatv(GL_CURRENT_COLOR, color);
+ color_key.sprintf("%f_%f_%f",color[0], color[1], color[2]);
+ }
+ QString key = font.key() + color_key + QString::number((int) regenerate);
+#else
+ QString key = font.key() + QString::number((int) regenerate);
+#endif
+ if (!regenerate && (d->displayListCache.find(key) != d->displayListCache.end())) {
+ base = d->displayListCache[key];
+ } else {
+ int maxBase = listBase - 256;
+ QMap<QString,int>::ConstIterator it;
+ for (it = d->displayListCache.constBegin(); it != d->displayListCache.constEnd(); ++it) {
+ if (maxBase < it.value()) {
+ maxBase = it.value();
+ }
+ }
+ maxBase += 256;
+ d->glcx->generateFontDisplayLists(font, maxBase);
+ d->displayListCache[key] = maxBase;
+ base = maxBase;
+ }
+ return base;
+#else // QT_OPENGL_ES
+ Q_UNUSED(font);
+ Q_UNUSED(listBase);
+ return 0;
+#endif
+}
+
+#ifndef QT_OPENGL_ES
+
+static void qt_save_gl_state()
+{
+ glPushClientAttrib(GL_CLIENT_ALL_ATTRIB_BITS);
+ glPushAttrib(GL_ALL_ATTRIB_BITS);
+ glMatrixMode(GL_TEXTURE);
+ glPushMatrix();
+ glLoadIdentity();
+ glMatrixMode(GL_PROJECTION);
+ glPushMatrix();
+ glMatrixMode(GL_MODELVIEW);
+ glPushMatrix();
+
+ glShadeModel(GL_FLAT);
+ glDisable(GL_CULL_FACE);
+ glDisable(GL_LIGHTING);
+ glDisable(GL_STENCIL_TEST);
+ glDisable(GL_DEPTH_TEST);
+ glEnable(GL_BLEND);
+ glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
+}
+
+static void qt_restore_gl_state()
+{
+ glMatrixMode(GL_TEXTURE);
+ glPopMatrix();
+ glMatrixMode(GL_PROJECTION);
+ glPopMatrix();
+ glMatrixMode(GL_MODELVIEW);
+ glPopMatrix();
+ glPopAttrib();
+ glPopClientAttrib();
+}
+
+static void qt_gl_draw_text(QPainter *p, int x, int y, const QString &str,
+ const QFont &font)
+{
+ GLfloat color[4];
+ glGetFloatv(GL_CURRENT_COLOR, &color[0]);
+
+ QColor col;
+ col.setRgbF(color[0], color[1], color[2],color[3]);
+ QPen old_pen = p->pen();
+ QFont old_font = p->font();
+
+ p->setPen(col);
+ p->setFont(font);
+ p->drawText(x, y, str);
+
+ p->setPen(old_pen);
+ p->setFont(old_font);
+}
+
+#endif // !QT_OPENGL_ES
+
+/*!
+ Renders the string \a str into the GL context of this widget.
+
+ \a x and \a y are specified in window coordinates, with the origin
+ in the upper left-hand corner of the window. If \a font is not
+ specified, the currently set application font will be used to
+ render the string. To change the color of the rendered text you can
+ use the glColor() call (or the qglColor() convenience function),
+ just before the renderText() call.
+
+ The \a listBase parameter is obsolete and will be removed in a
+ future version of Qt.
+
+ \note This function clears the stencil buffer.
+
+ \note This function is not supported on OpenGL/ES systems.
+
+ \note This function temporarily disables depth-testing when the
+ text is drawn.
+
+ \note This function can only be used inside a
+ QPainter::beginNativePainting()/QPainter::endNativePainting() block
+ if the default OpenGL paint engine is QPaintEngine::OpenGL. To make
+ QPaintEngine::OpenGL the default GL engine, call
+ QGL::setPreferredPaintEngine(QPaintEngine::OpenGL) before the
+ QApplication constructor.
+
+ \l{Overpainting Example}{Overpaint} with QPainter::drawText() instead.
+*/
+
+void QGLWidget::renderText(int x, int y, const QString &str, const QFont &font, int)
+{
+#ifndef QT_OPENGL_ES
+ Q_D(QGLWidget);
+ if (str.isEmpty() || !isValid())
+ return;
+
+ GLint view[4];
+ bool use_scissor_testing = glIsEnabled(GL_SCISSOR_TEST);
+ if (!use_scissor_testing)
+ glGetIntegerv(GL_VIEWPORT, &view[0]);
+ int width = d->glcx->device()->width();
+ int height = d->glcx->device()->height();
+ bool auto_swap = autoBufferSwap();
+
+ QPaintEngine::Type oldEngineType = qgl_engine_selector()->preferredPaintEngine();
+
+ QPaintEngine *engine = paintEngine();
+ if (engine && (oldEngineType == QPaintEngine::OpenGL2) && engine->isActive()) {
+ qWarning("QGLWidget::renderText(): Calling renderText() while a GL 2 paint engine is"
+ " active on the same device is not allowed.");
+ return;
+ }
+
+ // this changes what paintEngine() returns
+ qgl_engine_selector()->setPreferredPaintEngine(QPaintEngine::OpenGL);
+ engine = paintEngine();
+ QPainter *p;
+ bool reuse_painter = false;
+ if (engine->isActive()) {
+ reuse_painter = true;
+ p = engine->painter();
+ qt_save_gl_state();
+
+ glDisable(GL_DEPTH_TEST);
+ glViewport(0, 0, width, height);
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ glOrtho(0, width, height, 0, 0, 1);
+ glMatrixMode(GL_MODELVIEW);
+
+ glLoadIdentity();
+ } else {
+ setAutoBufferSwap(false);
+ // disable glClear() as a result of QPainter::begin()
+ d->disable_clear_on_painter_begin = true;
+ p = new QPainter(this);
+ }
+
+ QRect viewport(view[0], view[1], view[2], view[3]);
+ if (!use_scissor_testing && viewport != rect()) {
+ // if the user hasn't set a scissor box, we set one that
+ // covers the current viewport
+ glScissor(view[0], view[1], view[2], view[3]);
+ glEnable(GL_SCISSOR_TEST);
+ } else if (use_scissor_testing) {
+ // use the scissor box set by the user
+ glEnable(GL_SCISSOR_TEST);
+ }
+
+ qt_gl_draw_text(p, x, y, str, font);
+
+ if (reuse_painter) {
+ qt_restore_gl_state();
+ } else {
+ p->end();
+ delete p;
+ setAutoBufferSwap(auto_swap);
+ d->disable_clear_on_painter_begin = false;
+ }
+ qgl_engine_selector()->setPreferredPaintEngine(oldEngineType);
+#else // QT_OPENGL_ES
+ Q_UNUSED(x);
+ Q_UNUSED(y);
+ Q_UNUSED(str);
+ Q_UNUSED(font);
+ qWarning("QGLWidget::renderText is not supported under OpenGL/ES");
+#endif
+}
+
+/*! \overload
+
+ \a x, \a y and \a z are specified in scene or object coordinates
+ relative to the currently set projection and model matrices. This
+ can be useful if you want to annotate models with text labels and
+ have the labels move with the model as it is rotated etc.
+
+ \note This function is not supported on OpenGL/ES systems.
+
+ \note If depth testing is enabled before this function is called,
+ then the drawn text will be depth-tested against the models that
+ have already been drawn in the scene. Use \c{glDisable(GL_DEPTH_TEST)}
+ before calling this function to annotate the models without
+ depth-testing the text.
+
+ \l{Overpainting Example}{Overpaint} with QPainter::drawText() instead.
+*/
+void QGLWidget::renderText(double x, double y, double z, const QString &str, const QFont &font, int)
+{
+#ifndef QT_OPENGL_ES
+ Q_D(QGLWidget);
+ if (str.isEmpty() || !isValid())
+ return;
+
+ bool auto_swap = autoBufferSwap();
+
+ int width = d->glcx->device()->width();
+ int height = d->glcx->device()->height();
+ GLdouble model[4][4], proj[4][4];
+ GLint view[4];
+ glGetDoublev(GL_MODELVIEW_MATRIX, &model[0][0]);
+ glGetDoublev(GL_PROJECTION_MATRIX, &proj[0][0]);
+ glGetIntegerv(GL_VIEWPORT, &view[0]);
+ GLdouble win_x = 0, win_y = 0, win_z = 0;
+ qgluProject(x, y, z, &model[0][0], &proj[0][0], &view[0],
+ &win_x, &win_y, &win_z);
+ win_y = height - win_y; // y is inverted
+
+ QPaintEngine::Type oldEngineType = qgl_engine_selector()->preferredPaintEngine();
+ QPaintEngine *engine = paintEngine();
+
+ if (engine && (oldEngineType == QPaintEngine::OpenGL2) && engine->isActive()) {
+ qWarning("QGLWidget::renderText(): Calling renderText() while a GL 2 paint engine is"
+ " active on the same device is not allowed.");
+ return;
+ }
+
+ // this changes what paintEngine() returns
+ qgl_engine_selector()->setPreferredPaintEngine(QPaintEngine::OpenGL);
+ engine = paintEngine();
+ QPainter *p;
+ bool reuse_painter = false;
+ bool use_depth_testing = glIsEnabled(GL_DEPTH_TEST);
+ bool use_scissor_testing = glIsEnabled(GL_SCISSOR_TEST);
+
+ if (engine->isActive()) {
+ reuse_painter = true;
+ p = engine->painter();
+ qt_save_gl_state();
+ } else {
+ setAutoBufferSwap(false);
+ // disable glClear() as a result of QPainter::begin()
+ d->disable_clear_on_painter_begin = true;
+ p = new QPainter(this);
+ }
+
+ QRect viewport(view[0], view[1], view[2], view[3]);
+ if (!use_scissor_testing && viewport != rect()) {
+ glScissor(view[0], view[1], view[2], view[3]);
+ glEnable(GL_SCISSOR_TEST);
+ } else if (use_scissor_testing) {
+ glEnable(GL_SCISSOR_TEST);
+ }
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ glViewport(0, 0, width, height);
+ glOrtho(0, width, height, 0, 0, 1);
+ glMatrixMode(GL_MODELVIEW);
+ glLoadIdentity();
+ glAlphaFunc(GL_GREATER, 0.0);
+ glEnable(GL_ALPHA_TEST);
+ if (use_depth_testing)
+ glEnable(GL_DEPTH_TEST);
+ glTranslated(0, 0, -win_z);
+ qt_gl_draw_text(p, qRound(win_x), qRound(win_y), str, font);
+
+ if (reuse_painter) {
+ qt_restore_gl_state();
+ } else {
+ p->end();
+ delete p;
+ setAutoBufferSwap(auto_swap);
+ d->disable_clear_on_painter_begin = false;
+ }
+ qgl_engine_selector()->setPreferredPaintEngine(oldEngineType);
+#else // QT_OPENGL_ES
+ Q_UNUSED(x);
+ Q_UNUSED(y);
+ Q_UNUSED(z);
+ Q_UNUSED(str);
+ Q_UNUSED(font);
+ qWarning("QGLWidget::renderText is not supported under OpenGL/ES");
+#endif
+}
+
+QGLFormat QGLWidget::format() const
+{
+ Q_D(const QGLWidget);
+ return d->glcx->format();
+}
+
+const QGLContext *QGLWidget::context() const
+{
+ Q_D(const QGLWidget);
+ return d->glcx;
+}
+
+bool QGLWidget::doubleBuffer() const
+{
+ Q_D(const QGLWidget);
+ return d->glcx->d_ptr->glFormat.testOption(QGL::DoubleBuffer);
+}
+
+void QGLWidget::setAutoBufferSwap(bool on)
+{
+ Q_D(QGLWidget);
+ d->autoSwap = on;
+}
+
+bool QGLWidget::autoBufferSwap() const
+{
+ Q_D(const QGLWidget);
+ return d->autoSwap;
+}
+
+/*!
+ Calls QGLContext:::bindTexture(\a image, \a target, \a format) on the currently
+ set context.
+
+ \sa deleteTexture()
+*/
+GLuint QGLWidget::bindTexture(const QImage &image, GLenum target, GLint format)
+{
+ if (image.isNull())
+ return 0;
+
+ Q_D(QGLWidget);
+ return d->glcx->bindTexture(image, target, format, QGLContext::DefaultBindOption);
+}
+
+/*!
+ \overload
+ \since 4.6
+
+ The binding \a options are a set of options used to decide how to
+ bind the texture to the context.
+ */
+GLuint QGLWidget::bindTexture(const QImage &image, GLenum target, GLint format, QGLContext::BindOptions options)
+{
+ if (image.isNull())
+ return 0;
+
+ Q_D(QGLWidget);
+ return d->glcx->bindTexture(image, target, format, options);
+}
+
+
+#ifdef Q_MAC_COMPAT_GL_FUNCTIONS
+/*! \internal */
+GLuint QGLWidget::bindTexture(const QImage &image, QMacCompatGLenum target, QMacCompatGLint format)
+{
+ if (image.isNull())
+ return 0;
+
+ Q_D(QGLWidget);
+ return d->glcx->bindTexture(image, GLenum(target), GLint(format), QGLContext::DefaultBindOption);
+}
+
+GLuint QGLWidget::bindTexture(const QImage &image, QMacCompatGLenum target, QMacCompatGLint format,
+ QGLContext::BindOptions options)
+{
+ if (image.isNull())
+ return 0;
+
+ Q_D(QGLWidget);
+ return d->glcx->bindTexture(image, GLenum(target), GLint(format), options);
+}
+#endif
+
+/*!
+ Calls QGLContext:::bindTexture(\a pixmap, \a target, \a format) on the currently
+ set context.
+
+ \sa deleteTexture()
+*/
+GLuint QGLWidget::bindTexture(const QPixmap &pixmap, GLenum target, GLint format)
+{
+ if (pixmap.isNull())
+ return 0;
+
+ Q_D(QGLWidget);
+ return d->glcx->bindTexture(pixmap, target, format, QGLContext::DefaultBindOption);
+}
+
+/*!
+ \overload
+ \since 4.6
+
+ Generates and binds a 2D GL texture to the current context, based
+ on \a pixmap. The generated texture id is returned and can be used in
+
+ The binding \a options are a set of options used to decide how to
+ bind the texture to the context.
+ */
+GLuint QGLWidget::bindTexture(const QPixmap &pixmap, GLenum target, GLint format,
+ QGLContext::BindOptions options)
+{
+ Q_D(QGLWidget);
+ return d->glcx->bindTexture(pixmap, target, format, options);
+}
+
+#ifdef Q_MAC_COMPAT_GL_FUNCTIONS
+/*! \internal */
+GLuint QGLWidget::bindTexture(const QPixmap &pixmap, QMacCompatGLenum target, QMacCompatGLint format)
+{
+ Q_D(QGLWidget);
+ return d->glcx->bindTexture(pixmap, target, format, QGLContext::DefaultBindOption);
+}
+
+GLuint QGLWidget::bindTexture(const QPixmap &pixmap, QMacCompatGLenum target, QMacCompatGLint format,
+ QGLContext::BindOptions options)
+{
+ Q_D(QGLWidget);
+ return d->glcx->bindTexture(pixmap, target, format, options);
+}
+#endif
+
+
+/*! \overload
+
+ Calls QGLContext::bindTexture(\a fileName) on the currently set context.
+
+ \sa deleteTexture()
+*/
+GLuint QGLWidget::bindTexture(const QString &fileName)
+{
+ Q_D(QGLWidget);
+ return d->glcx->bindTexture(fileName);
+}
+
+/*!
+ Calls QGLContext::deleteTexture(\a id) on the currently set
+ context.
+
+ \sa bindTexture()
+*/
+void QGLWidget::deleteTexture(GLuint id)
+{
+ Q_D(QGLWidget);
+ d->glcx->deleteTexture(id);
+}
+
+#ifdef Q_MAC_COMPAT_GL_FUNCTIONS
+/*! \internal */
+void QGLWidget::deleteTexture(QMacCompatGLuint id)
+{
+ Q_D(QGLWidget);
+ d->glcx->deleteTexture(GLuint(id));
+}
+#endif
+
+/*!
+ \since 4.4
+
+ Calls the corresponding QGLContext::drawTexture() with
+ \a target, \a textureId, and \a textureTarget for this
+ widget's context.
+*/
+void QGLWidget::drawTexture(const QRectF &target, GLuint textureId, GLenum textureTarget)
+{
+ Q_D(QGLWidget);
+ d->glcx->drawTexture(target, textureId, textureTarget);
+}
+
+#ifdef Q_MAC_COMPAT_GL_FUNCTIONS
+/*! \internal */
+void QGLWidget::drawTexture(const QRectF &target, QMacCompatGLuint textureId, QMacCompatGLenum textureTarget)
+{
+ Q_D(QGLWidget);
+ d->glcx->drawTexture(target, GLint(textureId), GLenum(textureTarget));
+}
+#endif
+
+/*!
+ \since 4.4
+
+ Calls the corresponding QGLContext::drawTexture() with
+ \a point, \a textureId, and \a textureTarget for this
+ widget's context.
+*/
+void QGLWidget::drawTexture(const QPointF &point, GLuint textureId, GLenum textureTarget)
+{
+ Q_D(QGLWidget);
+ d->glcx->drawTexture(point, textureId, textureTarget);
+}
+
+#ifdef Q_MAC_COMPAT_GL_FUNCTIONS
+/*! \internal */
+void QGLWidget::drawTexture(const QPointF &point, QMacCompatGLuint textureId, QMacCompatGLenum textureTarget)
+{
+ Q_D(QGLWidget);
+ d->glcx->drawTexture(point, GLuint(textureId), GLenum(textureTarget));
+}
+#endif
+
+#ifndef QT_OPENGL_ES_1
+Q_GLOBAL_STATIC(QGLEngineThreadStorage<QGL2PaintEngineEx>, qt_gl_2_engine)
+#endif
+
+#ifndef QT_OPENGL_ES_2
+Q_GLOBAL_STATIC(QGLEngineThreadStorage<QOpenGLPaintEngine>, qt_gl_engine)
+#endif
+
+Q_OPENGL_EXPORT QPaintEngine* qt_qgl_paint_engine()
+{
+#if defined(QT_OPENGL_ES_1)
+ return qt_gl_engine()->engine();
+#elif defined(QT_OPENGL_ES_2)
+ return qt_gl_2_engine()->engine();
+#else
+ if (qt_gl_preferGL2Engine())
+ return qt_gl_2_engine()->engine();
+ else
+ return qt_gl_engine()->engine();
+#endif
+}
+
+/*!
+ \internal
+
+ Returns the GL widget's paint engine. This is normally a
+ QOpenGLPaintEngine.
+*/
+QPaintEngine *QGLWidget::paintEngine() const
+{
+ return qt_qgl_paint_engine();
+}
+
+#ifdef QT3_SUPPORT
+/*!
+ \overload
+ \obsolete
+ */
+QGLWidget::QGLWidget(QWidget *parent, const char *name,
+ const QGLWidget* shareWidget, Qt::WindowFlags f)
+ : QWidget(*(new QGLWidgetPrivate), parent, f | Qt::MSWindowsOwnDC)
+{
+ Q_D(QGLWidget);
+ if (name)
+ setObjectName(QString::fromAscii(name));
+ setAttribute(Qt::WA_PaintOnScreen);
+ setAttribute(Qt::WA_NoSystemBackground);
+ setAutoFillBackground(true); // for compatibility
+ d->init(new QGLContext(QGLFormat::defaultFormat(), this), shareWidget);
+}
+
+/*!
+ \overload
+ \obsolete
+ */
+QGLWidget::QGLWidget(const QGLFormat &format, QWidget *parent,
+ const char *name, const QGLWidget* shareWidget,
+ Qt::WindowFlags f)
+ : QWidget(*(new QGLWidgetPrivate), parent, f | Qt::MSWindowsOwnDC)
+{
+ Q_D(QGLWidget);
+ if (name)
+ setObjectName(QString::fromAscii(name));
+ setAttribute(Qt::WA_PaintOnScreen);
+ setAttribute(Qt::WA_NoSystemBackground);
+ setAutoFillBackground(true); // for compatibility
+ d->init(new QGLContext(format, this), shareWidget);
+}
+
+/*!
+ \overload
+ \obsolete
+ */
+QGLWidget::QGLWidget(QGLContext *context, QWidget *parent,
+ const char *name, const QGLWidget *shareWidget, Qt::WindowFlags f)
+ : QWidget(*(new QGLWidgetPrivate), parent, f | Qt::MSWindowsOwnDC)
+{
+ Q_D(QGLWidget);
+ if (name)
+ setObjectName(QString::fromAscii(name));
+ setAttribute(Qt::WA_PaintOnScreen);
+ setAttribute(Qt::WA_NoSystemBackground);
+ setAutoFillBackground(true); // for compatibility
+ d->init(context, shareWidget);
+}
+
+#endif // QT3_SUPPORT
+
+typedef GLubyte * (*qt_glGetStringi)(GLenum, GLuint);
+
+#ifndef GL_NUM_EXTENSIONS
+#define GL_NUM_EXTENSIONS 0x821D
+#endif
+
+QGLExtensionMatcher::QGLExtensionMatcher(const char *str)
+{
+ init(str);
+}
+
+QGLExtensionMatcher::QGLExtensionMatcher()
+{
+ const char *extensionStr = reinterpret_cast<const char *>(glGetString(GL_EXTENSIONS));
+
+ if (extensionStr) {
+ init(extensionStr);
+ } else {
+ // clear error state
+ while (glGetError()) {}
+
+ const QGLContext *ctx = QGLContext::currentContext();
+ if (ctx) {
+ qt_glGetStringi glGetStringi = (qt_glGetStringi)ctx->getProcAddress(QLatin1String("glGetStringi"));
+
+ GLint numExtensions;
+ glGetIntegerv(GL_NUM_EXTENSIONS, &numExtensions);
+
+ for (int i = 0; i < numExtensions; ++i) {
+ const char *str = reinterpret_cast<const char *>(glGetStringi(GL_EXTENSIONS, i));
+
+ m_offsets << m_extensions.size();
+
+ while (*str != 0)
+ m_extensions.append(*str++);
+ m_extensions.append(' ');
+ }
+ }
+ }
+}
+
+void QGLExtensionMatcher::init(const char *str)
+{
+ m_extensions = str;
+
+ // make sure extension string ends with a space
+ if (!m_extensions.endsWith(' '))
+ m_extensions.append(' ');
+
+ int index = 0;
+ int next = 0;
+ while ((next = m_extensions.indexOf(' ', index)) >= 0) {
+ m_offsets << index;
+ index = next + 1;
+ }
+}
+
+/*
+ Returns the GL extensions for the current context.
+*/
+QGLExtensions::Extensions QGLExtensions::currentContextExtensions()
+{
+ QGLExtensionMatcher extensions;
+ Extensions glExtensions;
+
+ if (extensions.match("GL_ARB_texture_rectangle"))
+ glExtensions |= TextureRectangle;
+ if (extensions.match("GL_ARB_multisample"))
+ glExtensions |= SampleBuffers;
+ if (extensions.match("GL_SGIS_generate_mipmap"))
+ glExtensions |= GenerateMipmap;
+ if (extensions.match("GL_ARB_texture_compression"))
+ glExtensions |= TextureCompression;
+ if (extensions.match("GL_EXT_texture_compression_s3tc"))
+ glExtensions |= DDSTextureCompression;
+ if (extensions.match("GL_OES_compressed_ETC1_RGB8_texture"))
+ glExtensions |= ETC1TextureCompression;
+ if (extensions.match("GL_IMG_texture_compression_pvrtc"))
+ glExtensions |= PVRTCTextureCompression;
+ if (extensions.match("GL_ARB_fragment_program"))
+ glExtensions |= FragmentProgram;
+ if (extensions.match("GL_ARB_fragment_shader"))
+ glExtensions |= FragmentShader;
+ if (extensions.match("GL_ARB_shader_objects"))
+ glExtensions |= FragmentShader;
+ if (extensions.match("GL_ARB_texture_mirrored_repeat"))
+ glExtensions |= MirroredRepeat;
+ if (extensions.match("GL_EXT_framebuffer_object"))
+ glExtensions |= FramebufferObject;
+ if (extensions.match("GL_EXT_stencil_two_side"))
+ glExtensions |= StencilTwoSide;
+ if (extensions.match("GL_EXT_stencil_wrap"))
+ glExtensions |= StencilWrap;
+ if (extensions.match("GL_EXT_packed_depth_stencil"))
+ glExtensions |= PackedDepthStencil;
+ if (extensions.match("GL_NV_float_buffer"))
+ glExtensions |= NVFloatBuffer;
+ if (extensions.match("GL_ARB_pixel_buffer_object"))
+ glExtensions |= PixelBufferObject;
+ if (extensions.match("GL_IMG_texture_format_BGRA8888"))
+ glExtensions |= BGRATextureFormat;
+#if defined(QT_OPENGL_ES_2)
+ glExtensions |= FramebufferObject;
+ glExtensions |= GenerateMipmap;
+ glExtensions |= FragmentShader;
+#endif
+#if defined(QT_OPENGL_ES_1)
+ if (extensions.match("GL_OES_framebuffer_object"))
+ glExtensions |= FramebufferObject;
+#endif
+#if defined(QT_OPENGL_ES)
+ if (extensions.match("GL_OES_packed_depth_stencil"))
+ glExtensions |= PackedDepthStencil;
+ if (extensions.match("GL_OES_element_index_uint"))
+ glExtensions |= ElementIndexUint;
+ if (extensions.match("GL_OES_depth24"))
+ glExtensions |= Depth24;
+#else
+ glExtensions |= ElementIndexUint;
+#endif
+ if (extensions.match("GL_ARB_framebuffer_object")) {
+ // ARB_framebuffer_object also includes EXT_framebuffer_blit.
+ glExtensions |= FramebufferObject;
+ glExtensions |= FramebufferBlit;
+ }
+
+ if (extensions.match("GL_EXT_framebuffer_blit"))
+ glExtensions |= FramebufferBlit;
+
+ if (extensions.match("GL_ARB_texture_non_power_of_two"))
+ glExtensions |= NPOTTextures;
+
+ if (extensions.match("GL_EXT_bgra"))
+ glExtensions |= BGRATextureFormat;
+
+ return glExtensions;
+}
+
+
+class QGLDefaultExtensions
+{
+public:
+ QGLDefaultExtensions() {
+ QGLTemporaryContext tempContext;
+ extensions = QGLExtensions::currentContextExtensions();
+ }
+
+ QGLExtensions::Extensions extensions;
+};
+
+Q_GLOBAL_STATIC(QGLDefaultExtensions, qtDefaultExtensions)
+
+/*
+ Returns the GL extensions for the current QGLContext. If there is no
+ current QGLContext, a default context will be created and the extensions
+ for that context will be returned instead.
+*/
+QGLExtensions::Extensions QGLExtensions::glExtensions()
+{
+ Extensions extensionFlags = 0;
+ QGLContext *currentCtx = const_cast<QGLContext *>(QGLContext::currentContext());
+
+ if (currentCtx && currentCtx->d_func()->extension_flags_cached)
+ return currentCtx->d_func()->extension_flags;
+
+ if (!currentCtx) {
+ extensionFlags = qtDefaultExtensions()->extensions;
+ } else {
+ extensionFlags = currentContextExtensions();
+ currentCtx->d_func()->extension_flags_cached = true;
+ currentCtx->d_func()->extension_flags = extensionFlags;
+ }
+ return extensionFlags;
+}
+
+/*
+ This is the shared initialization for all platforms. Called from QGLWidgetPrivate::init()
+*/
+void QGLWidgetPrivate::initContext(QGLContext *context, const QGLWidget* shareWidget)
+{
+ Q_Q(QGLWidget);
+
+ glDevice.setWidget(q);
+
+ glcx = 0;
+ autoSwap = true;
+
+ if (context && !context->device())
+ context->setDevice(q);
+ q->setContext(context, shareWidget ? shareWidget->context() : 0);
+
+ if (!glcx)
+ glcx = new QGLContext(QGLFormat::defaultFormat(), q);
+}
+
+#if defined(Q_WS_X11) || defined(Q_WS_MAC) || defined(Q_WS_QWS) || defined(Q_WS_QPA)
+Q_GLOBAL_STATIC(QString, qt_gl_lib_name)
+
+Q_OPENGL_EXPORT void qt_set_gl_library_name(const QString& name)
+{
+ qt_gl_lib_name()->operator=(name);
+}
+
+Q_OPENGL_EXPORT const QString qt_gl_library_name()
+{
+ if (qt_gl_lib_name()->isNull()) {
+#ifdef Q_WS_MAC
+ return QLatin1String("/System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib");
+#else
+# if defined(QT_OPENGL_ES_1)
+ return QLatin1String("GLES_CM");
+# elif defined(QT_OPENGL_ES_2)
+ return QLatin1String("GLESv2");
+# else
+ return QLatin1String("GL");
+# endif
+#endif // defined Q_WS_MAC
+ }
+ return *qt_gl_lib_name();
+}
+#endif
+
+void QGLContextGroup::addShare(const QGLContext *context, const QGLContext *share) {
+ Q_ASSERT(context && share);
+ if (context->d_ptr->group == share->d_ptr->group)
+ return;
+
+ // Make sure 'context' is not already shared with another group of contexts.
+ Q_ASSERT(context->d_ptr->group->m_refs == 1);
+
+ // Free 'context' group resources and make it use the same resources as 'share'.
+ QGLContextGroup *group = share->d_ptr->group;
+ delete context->d_ptr->group;
+ context->d_ptr->group = group;
+ group->m_refs.ref();
+
+ // Maintain a list of all the contexts in each group of sharing contexts.
+ // The list is empty if the "share" context wasn't sharing already.
+ if (group->m_shares.isEmpty())
+ group->m_shares.append(share);
+ group->m_shares.append(context);
+}
+
+void QGLContextGroup::removeShare(const QGLContext *context) {
+ // Remove the context from the group.
+ QGLContextGroup *group = context->d_ptr->group;
+ if (group->m_shares.isEmpty())
+ return;
+ group->m_shares.removeAll(context);
+
+ // Update context group representative.
+ Q_ASSERT(group->m_shares.size() != 0);
+ if (group->m_context == context)
+ group->m_context = group->m_shares[0];
+
+ // If there is only one context left, then make the list empty.
+ if (group->m_shares.size() == 1)
+ group->m_shares.clear();
+}
+
+QGLContextGroupResourceBase::QGLContextGroupResourceBase()
+ : active(0)
+{
+#ifdef QT_GL_CONTEXT_RESOURCE_DEBUG
+ qDebug("Creating context group resource object %p.", this);
+#endif
+}
+
+QGLContextGroupResourceBase::~QGLContextGroupResourceBase()
+{
+#ifdef QT_GL_CONTEXT_RESOURCE_DEBUG
+ qDebug("Deleting context group resource %p. Group size: %d.", this, m_groups.size());
+#endif
+ for (int i = 0; i < m_groups.size(); ++i) {
+ m_groups.at(i)->m_resources.remove(this);
+ active.deref();
+ }
+#ifndef QT_NO_DEBUG
+ if (active != 0) {
+ qWarning("QtOpenGL: Resources are still available at program shutdown.\n"
+ " This is possibly caused by a leaked QGLWidget, \n"
+ " QGLFramebufferObject or QGLPixelBuffer.");
+ }
+#endif
+}
+
+void QGLContextGroupResourceBase::insert(const QGLContext *context, void *value)
+{
+#ifdef QT_GL_CONTEXT_RESOURCE_DEBUG
+ qDebug("Inserting context group resource %p for context %p, managed by %p.", value, context, this);
+#endif
+ QGLContextGroup *group = QGLContextPrivate::contextGroup(context);
+ Q_ASSERT(!group->m_resources.contains(this));
+ group->m_resources.insert(this, value);
+ m_groups.append(group);
+ active.ref();
+}
+
+void *QGLContextGroupResourceBase::value(const QGLContext *context)
+{
+ QGLContextGroup *group = QGLContextPrivate::contextGroup(context);
+ return group->m_resources.value(this, 0);
+}
+
+void QGLContextGroupResourceBase::cleanup(const QGLContext *ctx)
+{
+ void *resource = value(ctx);
+
+ if (resource != 0) {
+ QGLShareContextScope scope(ctx);
+ freeResource(resource);
+
+ QGLContextGroup *group = QGLContextPrivate::contextGroup(ctx);
+ group->m_resources.remove(this);
+ m_groups.removeOne(group);
+ active.deref();
+ }
+}
+
+void QGLContextGroupResourceBase::cleanup(const QGLContext *ctx, void *value)
+{
+#ifdef QT_GL_CONTEXT_RESOURCE_DEBUG
+ qDebug("Cleaning up context group resource %p, for context %p in thread %p.", this, ctx, QThread::currentThread());
+#endif
+ QGLShareContextScope scope(ctx);
+ freeResource(value);
+ active.deref();
+
+ QGLContextGroup *group = QGLContextPrivate::contextGroup(ctx);
+ m_groups.removeOne(group);
+}
+
+void QGLContextGroup::cleanupResources(const QGLContext *context)
+{
+ // If there are still shares, then no cleanup to be done yet.
+ if (m_shares.size() > 1)
+ return;
+
+ // Iterate over all resources and free each in turn.
+ QHash<QGLContextGroupResourceBase *, void *>::ConstIterator it;
+ for (it = m_resources.begin(); it != m_resources.end(); ++it)
+ it.key()->cleanup(context, it.value());
+}
+
+QGLSharedResourceGuard::~QGLSharedResourceGuard()
+{
+ if (m_group)
+ m_group->removeGuard(this);
+}
+
+void QGLSharedResourceGuard::setContext(const QGLContext *context)
+{
+ if (m_group)
+ m_group->removeGuard(this);
+ if (context) {
+ m_group = QGLContextPrivate::contextGroup(context);
+ m_group->addGuard(this);
+ } else {
+ m_group = 0;
+ }
+}
+
+QSize QGLTexture::bindCompressedTexture
+ (const QString& fileName, const char *format)
+{
+ QFile file(fileName);
+ if (!file.open(QIODevice::ReadOnly))
+ return QSize();
+ QByteArray contents = file.readAll();
+ file.close();
+ return bindCompressedTexture
+ (contents.constData(), contents.size(), format);
+}
+
+// PVR header format for container files that store textures compressed
+// with the ETC1, PVRTC2, and PVRTC4 encodings. Format information from the
+// PowerVR SDK at http://www.imgtec.com/powervr/insider/powervr-sdk.asp
+// "PVRTexTool Reference Manual, version 1.11f".
+struct PvrHeader
+{
+ quint32 headerSize;
+ quint32 height;
+ quint32 width;
+ quint32 mipMapCount;
+ quint32 flags;
+ quint32 dataSize;
+ quint32 bitsPerPixel;
+ quint32 redMask;
+ quint32 greenMask;
+ quint32 blueMask;
+ quint32 alphaMask;
+ quint32 magic;
+ quint32 surfaceCount;
+};
+
+#define PVR_MAGIC 0x21525650 // "PVR!" in little-endian
+
+#define PVR_FORMAT_MASK 0x000000FF
+#define PVR_FORMAT_PVRTC2 0x00000018
+#define PVR_FORMAT_PVRTC4 0x00000019
+#define PVR_FORMAT_ETC1 0x00000036
+
+#define PVR_HAS_MIPMAPS 0x00000100
+#define PVR_TWIDDLED 0x00000200
+#define PVR_NORMAL_MAP 0x00000400
+#define PVR_BORDER_ADDED 0x00000800
+#define PVR_CUBE_MAP 0x00001000
+#define PVR_FALSE_COLOR_MIPMAPS 0x00002000
+#define PVR_VOLUME_TEXTURE 0x00004000
+#define PVR_ALPHA_IN_TEXTURE 0x00008000
+#define PVR_VERTICAL_FLIP 0x00010000
+
+#ifndef GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG
+#define GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG 0x8C00
+#define GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG 0x8C01
+#define GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG 0x8C02
+#define GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG 0x8C03
+#endif
+
+#ifndef GL_ETC1_RGB8_OES
+#define GL_ETC1_RGB8_OES 0x8D64
+#endif
+
+bool QGLTexture::canBindCompressedTexture
+ (const char *buf, int len, const char *format, bool *hasAlpha)
+{
+ if (QSysInfo::ByteOrder != QSysInfo::LittleEndian) {
+ // Compressed texture loading only supported on little-endian
+ // systems such as x86 and ARM at the moment.
+ return false;
+ }
+ if (!format) {
+ // Auto-detect the format from the header.
+ if (len >= 4 && !qstrncmp(buf, "DDS ", 4)) {
+ *hasAlpha = true;
+ return true;
+ } else if (len >= 52 && !qstrncmp(buf + 44, "PVR!", 4)) {
+ const PvrHeader *pvrHeader =
+ reinterpret_cast<const PvrHeader *>(buf);
+ *hasAlpha = (pvrHeader->alphaMask != 0);
+ return true;
+ }
+ } else {
+ // Validate the format against the header.
+ if (!qstricmp(format, "DDS")) {
+ if (len >= 4 && !qstrncmp(buf, "DDS ", 4)) {
+ *hasAlpha = true;
+ return true;
+ }
+ } else if (!qstricmp(format, "PVR") || !qstricmp(format, "ETC1")) {
+ if (len >= 52 && !qstrncmp(buf + 44, "PVR!", 4)) {
+ const PvrHeader *pvrHeader =
+ reinterpret_cast<const PvrHeader *>(buf);
+ *hasAlpha = (pvrHeader->alphaMask != 0);
+ return true;
+ }
+ }
+ }
+ return false;
+}
+
+#define ctx QGLContext::currentContext()
+
+QSize QGLTexture::bindCompressedTexture
+ (const char *buf, int len, const char *format)
+{
+ if (QSysInfo::ByteOrder != QSysInfo::LittleEndian) {
+ // Compressed texture loading only supported on little-endian
+ // systems such as x86 and ARM at the moment.
+ return QSize();
+ }
+#if !defined(QT_OPENGL_ES)
+ if (!glCompressedTexImage2D) {
+ if (!(QGLExtensions::glExtensions() & QGLExtensions::TextureCompression)) {
+ qWarning("QGLContext::bindTexture(): The GL implementation does "
+ "not support texture compression extensions.");
+ return QSize();
+ }
+ glCompressedTexImage2D = (_glCompressedTexImage2DARB) ctx->getProcAddress(QLatin1String("glCompressedTexImage2DARB"));
+ if (!glCompressedTexImage2D) {
+ qWarning("QGLContext::bindTexture(): could not resolve "
+ "glCompressedTexImage2DARB.");
+ return QSize();
+ }
+ }
+#endif
+ if (!format) {
+ // Auto-detect the format from the header.
+ if (len >= 4 && !qstrncmp(buf, "DDS ", 4))
+ return bindCompressedTextureDDS(buf, len);
+ else if (len >= 52 && !qstrncmp(buf + 44, "PVR!", 4))
+ return bindCompressedTexturePVR(buf, len);
+ } else {
+ // Validate the format against the header.
+ if (!qstricmp(format, "DDS")) {
+ if (len >= 4 && !qstrncmp(buf, "DDS ", 4))
+ return bindCompressedTextureDDS(buf, len);
+ } else if (!qstricmp(format, "PVR") || !qstricmp(format, "ETC1")) {
+ if (len >= 52 && !qstrncmp(buf + 44, "PVR!", 4))
+ return bindCompressedTexturePVR(buf, len);
+ }
+ }
+ return QSize();
+}
+
+QSize QGLTexture::bindCompressedTextureDDS(const char *buf, int len)
+{
+ // We only support 2D texture loading at present.
+ if (target != GL_TEXTURE_2D)
+ return QSize();
+
+ // Bail out if the necessary extension is not present.
+ if (!(QGLExtensions::glExtensions() & QGLExtensions::DDSTextureCompression)) {
+ qWarning("QGLContext::bindTexture(): DDS texture compression is not supported.");
+ return QSize();
+ }
+
+ const DDSFormat *ddsHeader = reinterpret_cast<const DDSFormat *>(buf + 4);
+ if (!ddsHeader->dwLinearSize) {
+ qWarning("QGLContext::bindTexture(): DDS image size is not valid.");
+ return QSize();
+ }
+
+ int blockSize = 16;
+ GLenum format;
+
+ switch(ddsHeader->ddsPixelFormat.dwFourCC) {
+ case FOURCC_DXT1:
+ format = GL_COMPRESSED_RGBA_S3TC_DXT1_EXT;
+ blockSize = 8;
+ break;
+ case FOURCC_DXT3:
+ format = GL_COMPRESSED_RGBA_S3TC_DXT3_EXT;
+ break;
+ case FOURCC_DXT5:
+ format = GL_COMPRESSED_RGBA_S3TC_DXT5_EXT;
+ break;
+ default:
+ qWarning("QGLContext::bindTexture(): DDS image format not supported.");
+ return QSize();
+ }
+
+ const GLubyte *pixels =
+ reinterpret_cast<const GLubyte *>(buf + ddsHeader->dwSize + 4);
+
+ glGenTextures(1, &id);
+ glBindTexture(GL_TEXTURE_2D, id);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+
+ int size;
+ int offset = 0;
+ int available = len - int(ddsHeader->dwSize + 4);
+ int w = ddsHeader->dwWidth;
+ int h = ddsHeader->dwHeight;
+
+ // load mip-maps
+ for(int i = 0; i < (int) ddsHeader->dwMipMapCount; ++i) {
+ if (w == 0) w = 1;
+ if (h == 0) h = 1;
+
+ size = ((w+3)/4) * ((h+3)/4) * blockSize;
+ if (size > available)
+ break;
+ glCompressedTexImage2D(GL_TEXTURE_2D, i, format, w, h, 0,
+ size, pixels + offset);
+ offset += size;
+ available -= size;
+
+ // half size for each mip-map level
+ w = w/2;
+ h = h/2;
+ }
+
+ // DDS images are not inverted.
+ options &= ~QGLContext::InvertedYBindOption;
+
+ return QSize(ddsHeader->dwWidth, ddsHeader->dwHeight);
+}
+
+QSize QGLTexture::bindCompressedTexturePVR(const char *buf, int len)
+{
+ // We only support 2D texture loading at present. Cube maps later.
+ if (target != GL_TEXTURE_2D)
+ return QSize();
+
+ // Determine which texture format we will be loading.
+ const PvrHeader *pvrHeader = reinterpret_cast<const PvrHeader *>(buf);
+ GLenum textureFormat;
+ quint32 minWidth, minHeight;
+ switch (pvrHeader->flags & PVR_FORMAT_MASK) {
+ case PVR_FORMAT_PVRTC2:
+ if (pvrHeader->alphaMask)
+ textureFormat = GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG;
+ else
+ textureFormat = GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG;
+ minWidth = 16;
+ minHeight = 8;
+ break;
+
+ case PVR_FORMAT_PVRTC4:
+ if (pvrHeader->alphaMask)
+ textureFormat = GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG;
+ else
+ textureFormat = GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG;
+ minWidth = 8;
+ minHeight = 8;
+ break;
+
+ case PVR_FORMAT_ETC1:
+ textureFormat = GL_ETC1_RGB8_OES;
+ minWidth = 4;
+ minHeight = 4;
+ break;
+
+ default:
+ qWarning("QGLContext::bindTexture(): PVR image format 0x%x not supported.", int(pvrHeader->flags & PVR_FORMAT_MASK));
+ return QSize();
+ }
+
+ // Bail out if the necessary extension is not present.
+ if (textureFormat == GL_ETC1_RGB8_OES) {
+ if (!(QGLExtensions::glExtensions() &
+ QGLExtensions::ETC1TextureCompression)) {
+ qWarning("QGLContext::bindTexture(): ETC1 texture compression is not supported.");
+ return QSize();
+ }
+ } else {
+ if (!(QGLExtensions::glExtensions() &
+ QGLExtensions::PVRTCTextureCompression)) {
+ qWarning("QGLContext::bindTexture(): PVRTC texture compression is not supported.");
+ return QSize();
+ }
+ }
+
+ // Boundary check on the buffer size.
+ quint32 bufferSize = pvrHeader->headerSize + pvrHeader->dataSize;
+ if (bufferSize > quint32(len)) {
+ qWarning("QGLContext::bindTexture(): PVR image size is not valid.");
+ return QSize();
+ }
+
+ // Create the texture.
+ glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+ glGenTextures(1, &id);
+ glBindTexture(GL_TEXTURE_2D, id);
+ if (pvrHeader->mipMapCount) {
+ if ((options & QGLContext::LinearFilteringBindOption) != 0) {
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
+ } else {
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
+ }
+ } else if ((options & QGLContext::LinearFilteringBindOption) != 0) {
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ } else {
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ }
+
+ // Load the compressed mipmap levels.
+ const GLubyte *buffer =
+ reinterpret_cast<const GLubyte *>(buf + pvrHeader->headerSize);
+ bufferSize = pvrHeader->dataSize;
+ quint32 level = 0;
+ quint32 width = pvrHeader->width;
+ quint32 height = pvrHeader->height;
+ while (bufferSize > 0 && level <= pvrHeader->mipMapCount) {
+ quint32 size =
+ (qMax(width, minWidth) * qMax(height, minHeight) *
+ pvrHeader->bitsPerPixel) / 8;
+ if (size > bufferSize)
+ break;
+ glCompressedTexImage2D(GL_TEXTURE_2D, GLint(level), textureFormat,
+