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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 246 insertions, 0 deletions

diff --git a/src/opengl/qglpaintdevice.cpp b/src/opengl/qglpaintdevice.cpp
new file mode 100644
index 0000000000..61d8f26fda
--- /dev/null
+++ b/src/opengl/qglpaintdevice.cpp
@@ -0,0 +1,246 @@
+/****************************************************************************
+**
+** 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 <private/qglpaintdevice_p.h>
+#include <private/qgl_p.h>
+#include <private/qglpixelbuffer_p.h>
+#include <private/qglframebufferobject_p.h>
+#ifdef Q_WS_X11
+#include <private/qpixmapdata_x11gl_p.h>
+#endif
+
+#if !defined(QT_OPENGL_ES_1)
+#include <private/qpixmapdata_gl_p.h>
+#include <private/qwindowsurface_gl_p.h>
+#endif
+
+QT_BEGIN_NAMESPACE
+
+QGLPaintDevice::QGLPaintDevice()
+    : m_thisFBO(0)
+{
+}
+
+QGLPaintDevice::~QGLPaintDevice()
+{
+}
+
+int QGLPaintDevice::metric(QPaintDevice::PaintDeviceMetric metric) const
+{
+    switch(metric) {
+    case PdmWidth:
+        return size().width();
+    case PdmHeight:
+        return size().height();
+    case PdmDepth: {
+        const QGLFormat f = format();
+        return f.redBufferSize() + f.greenBufferSize() + f.blueBufferSize() + f.alphaBufferSize();
+    }
+    default:
+        qWarning("QGLPaintDevice::metric() - metric %d not known", metric);
+        return 0;
+    }
+}
+
+void QGLPaintDevice::beginPaint()
+{
+    // Make sure our context is the current one:
+    QGLContext *ctx = context();
+    if (ctx != QGLContext::currentContext())
+        ctx->makeCurrent();
+
+    // Record the currently bound FBO so we can restore it again
+    // in endPaint() and bind this device's FBO
+    //
+    // Note: m_thisFBO could be zero if the paint device is not
+    // backed by an FBO (e.g. window back buffer).  But there could
+    // be a previous FBO bound to the context which we need to
+    // explicitly unbind.  Otherwise the painting will go into
+    // the previous FBO instead of to the window.
+    m_previousFBO = ctx->d_func()->current_fbo;
+
+    if (m_previousFBO != m_thisFBO) {
+        ctx->d_ptr->current_fbo = m_thisFBO;
+        glBindFramebuffer(GL_FRAMEBUFFER_EXT, m_thisFBO);
+    }
+
+    // Set the default fbo for the context to m_thisFBO so that
+    // if some raw GL code between beginNativePainting() and
+    // endNativePainting() calls QGLFramebufferObject::release(),
+    // painting will revert to the window surface's fbo.
+    ctx->d_ptr->default_fbo = m_thisFBO;
+}
+
+void QGLPaintDevice::ensureActiveTarget()
+{
+    QGLContext* ctx = context();
+    if (ctx != QGLContext::currentContext())
+        ctx->makeCurrent();
+
+    if (ctx->d_ptr->current_fbo != m_thisFBO) {
+        ctx->d_ptr->current_fbo = m_thisFBO;
+        glBindFramebuffer(GL_FRAMEBUFFER_EXT, m_thisFBO);
+    }
+
+    ctx->d_ptr->default_fbo = m_thisFBO;
+}
+
+void QGLPaintDevice::endPaint()
+{
+    // Make sure the FBO bound at beginPaint is re-bound again here:
+    QGLContext *ctx = context();
+    if (m_previousFBO != ctx->d_func()->current_fbo) {
+        ctx->d_ptr->current_fbo = m_previousFBO;
+        glBindFramebuffer(GL_FRAMEBUFFER_EXT, m_previousFBO);
+    }
+
+    ctx->d_ptr->default_fbo = 0;
+}
+
+QGLFormat QGLPaintDevice::format() const
+{
+    return context()->format();
+}
+
+bool QGLPaintDevice::alphaRequested() const
+{
+    return context()->d_func()->reqFormat.alpha();
+}
+
+bool QGLPaintDevice::isFlipped() const
+{
+    return false;
+}
+
+////////////////// QGLWidgetGLPaintDevice //////////////////
+
+QGLWidgetGLPaintDevice::QGLWidgetGLPaintDevice()
+{
+}
+
+QPaintEngine* QGLWidgetGLPaintDevice::paintEngine() const
+{
+    return glWidget->paintEngine();
+}
+
+void QGLWidgetGLPaintDevice::setWidget(QGLWidget* w)
+{
+    glWidget = w;
+}
+
+void QGLWidgetGLPaintDevice::beginPaint()
+{
+    QGLPaintDevice::beginPaint();
+    if (!glWidget->d_func()->disable_clear_on_painter_begin && glWidget->autoFillBackground()) {
+        if (glWidget->testAttribute(Qt::WA_TranslucentBackground))
+            glClearColor(0.0, 0.0, 0.0, 0.0);
+        else {
+            const QColor &c = glWidget->palette().brush(glWidget->backgroundRole()).color();
+            float alpha = c.alphaF();
+            glClearColor(c.redF() * alpha, c.greenF() * alpha, c.blueF() * alpha, alpha);
+        }
+        if (context()->d_func()->workaround_needsFullClearOnEveryFrame)
+            glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
+        else
+            glClear(GL_COLOR_BUFFER_BIT);
+    }
+}
+
+void QGLWidgetGLPaintDevice::endPaint()
+{
+    if (glWidget->autoBufferSwap())
+        glWidget->swapBuffers();
+    QGLPaintDevice::endPaint();
+}
+
+
+QSize QGLWidgetGLPaintDevice::size() const
+{
+    return glWidget->size();
+}
+
+QGLContext* QGLWidgetGLPaintDevice::context() const
+{
+    return const_cast<QGLContext*>(glWidget->context());
+}
+
+// returns the QGLPaintDevice for the given QPaintDevice
+QGLPaintDevice* QGLPaintDevice::getDevice(QPaintDevice* pd)
+{
+    QGLPaintDevice* glpd = 0;
+
+    switch(pd->devType()) {
+        case QInternal::Widget:
+            // Should not be called on a non-gl widget:
+            Q_ASSERT(qobject_cast<QGLWidget*>(static_cast<QWidget*>(pd)));
+            glpd = &(static_cast<QGLWidget*>(pd)->d_func()->glDevice);
+            break;
+        case QInternal::Pbuffer:
+            glpd = &(static_cast<QGLPixelBuffer*>(pd)->d_func()->glDevice);
+            break;
+        case QInternal::FramebufferObject:
+            glpd = &(static_cast<QGLFramebufferObject*>(pd)->d_func()->glDevice);
+            break;
+        case QInternal::Pixmap: {
+#if !defined(QT_OPENGL_ES_1)
+            QPixmapData* pmd = static_cast<QPixmap*>(pd)->pixmapData();
+            if (pmd->classId() == QPixmapData::OpenGLClass)
+                glpd = static_cast<QGLPixmapData*>(pmd)->glDevice();
+#ifdef Q_WS_X11
+            else if (pmd->classId() == QPixmapData::X11Class)
+                glpd = static_cast<QX11GLPixmapData*>(pmd);
+#endif
+            else
+                qWarning("Pixmap type not supported for GL rendering");
+#else
+            qWarning("Pixmap render targets not supported on OpenGL ES 1.x");
+#endif
+            break;
+        }
+        default:
+            qWarning("QGLPaintDevice::getDevice() - Unknown device type %d", pd->devType());
+            break;
+    }
+
+    return glpd;
+}
+
+QT_END_NAMESPACE