Integrate the OpenVG graphics system into Qt 4.6

This change also moves the EGL support classes from QtOpenGL to QtGui
so they can be shared between OpenGL and OpenVG.

1 files changed, 340 insertions, 0 deletions

diff --git a/src/openvg/qpixmapfilter_vg.cpp b/src/openvg/qpixmapfilter_vg.cpp
new file mode 100644
index 0000000000..ff8604b960
--- /dev/null
+++ b/src/openvg/qpixmapfilter_vg.cpp
@@ -0,0 +1,340 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtOpenVG 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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at http://www.qtsoftware.com/contact.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qpixmapfilter_vg_p.h"
+#include <QtCore/qvarlengtharray.h>
+#include <QtGui/qpainter.h>
+
+QT_BEGIN_NAMESPACE
+
+#if !defined(QT_SHIVAVG)
+
+QVGPixmapConvolutionFilter::QVGPixmapConvolutionFilter()
+    : QPixmapConvolutionFilter()
+{
+}
+
+QVGPixmapConvolutionFilter::~QVGPixmapConvolutionFilter()
+{
+}
+
+extern void qt_vg_drawVGImage
+    (QPainter *painter, const QPointF& pos, VGImage vgImg);
+
+void QVGPixmapConvolutionFilter::draw
+        (QPainter *painter, const QPointF &dest,
+         const QPixmap &src, const QRectF &srcRect) const
+{
+    if (src.pixmapData()->classId() != QPixmapData::OpenVGClass) {
+        // The pixmap data is not an instance of QVGPixmapData, so fall
+        // back to the default convolution filter implementation.
+        QPixmapConvolutionFilter::draw(painter, dest, src, srcRect);
+        return;
+    }
+
+    QVGPixmapData *pd = static_cast<QVGPixmapData *>(src.pixmapData());
+
+    VGImage srcImage = pd->toVGImage();
+    if (srcImage == VG_INVALID_HANDLE)
+        return;
+
+    QSize size = pd->size();
+    VGImage dstImage = vgCreateImage
+        (VG_sARGB_8888_PRE, size.width(), size.height(),
+         VG_IMAGE_QUALITY_FASTER);
+    if (dstImage == VG_INVALID_HANDLE)
+        return;
+
+    int kernelWidth = rows();
+    int kernelHeight = columns();
+    const qreal *kern = convolutionKernel();
+    QVarLengthArray<VGshort> kernel;
+    for (int i = 0; i < kernelWidth; ++i) {
+        for (int j = 0; j < kernelHeight; ++j) {
+            kernel.append((VGshort)(kern[j * kernelWidth + i] * 1024.0f));
+        }
+    }
+
+    VGfloat values[4];
+    values[0] = 0.0f;
+    values[1] = 0.0f;
+    values[2] = 0.0f;
+    values[3] = 0.0f;
+    vgSetfv(VG_TILE_FILL_COLOR, 4, values);
+
+    vgConvolve(dstImage, srcImage,
+               kernelWidth, kernelHeight, 0, 0,
+               kernel.constData(), 1.0f / 1024.0f, 0.0f,
+               VG_TILE_FILL);
+
+    VGImage child = VG_INVALID_HANDLE;
+
+    if (srcRect.isNull() ||
+        (srcRect.topLeft().isNull() && srcRect.size() == size)) {
+        child = dstImage;
+    } else {
+        QRect src = srcRect.toRect();
+        child = vgChildImage(dstImage, src.x(), src.y(), src.width(), src.height());
+    }
+
+    qt_vg_drawVGImage(painter, dest, child);
+
+    if(child != dstImage)
+        vgDestroyImage(child);
+    vgDestroyImage(dstImage);
+}
+
+QVGPixmapColorizeFilter::QVGPixmapColorizeFilter()
+    : QPixmapColorizeFilter(),
+      firstTime(true)
+{
+}
+
+QVGPixmapColorizeFilter::~QVGPixmapColorizeFilter()
+{
+}
+
+void QVGPixmapColorizeFilter::draw(QPainter *painter, const QPointF &dest, const QPixmap &src, const QRectF &srcRect) const
+{
+    if (src.pixmapData()->classId() != QPixmapData::OpenVGClass) {
+        // The pixmap data is not an instance of QVGPixmapData, so fall
+        // back to the default convolution filter implementation.
+        QPixmapColorizeFilter::draw(painter, dest, src, srcRect);
+        return;
+    }
+
+    QVGPixmapData *pd = static_cast<QVGPixmapData *>(src.pixmapData());
+
+    VGImage srcImage = pd->toVGImage();
+    if (srcImage == VG_INVALID_HANDLE)
+        return;
+
+    QSize size = pd->size();
+    VGImage dstImage = vgCreateImage
+        (VG_sARGB_8888_PRE, size.width(), size.height(),
+         VG_IMAGE_QUALITY_FASTER);
+    if (dstImage == VG_INVALID_HANDLE)
+        return;
+
+    // Recompute the color matrix if the color has changed.
+    QColor c = color();
+    if (c != prevColor || firstTime) {
+        prevColor = c;
+
+        // Determine the weights for the matrix from the color.
+        VGfloat weights[3];
+        VGfloat invweights[3];
+        VGfloat alpha = c.alphaF();
+        weights[0] = c.redF() * alpha;
+        weights[1] = c.greenF() * alpha;
+        weights[2] = c.blueF() * alpha;
+        invweights[0] = 1.0f - weights[0];
+        invweights[1] = 1.0f - weights[1];
+        invweights[2] = 1.0f - weights[2];
+
+        // Grayscale weights.
+        static const VGfloat redGray = 11.0f / 32.0f;
+        static const VGfloat greenGray = 16.0f / 32.0f;
+        static const VGfloat blueGray = 1.0f - (redGray + greenGray);
+
+        matrix[0][0] = redGray * invweights[0];
+        matrix[0][1] = redGray * invweights[1];
+        matrix[0][2] = redGray * invweights[2];
+        matrix[0][3] = 0.0f;
+        matrix[1][0] = greenGray * invweights[0];
+        matrix[1][1] = greenGray * invweights[1];
+        matrix[1][2] = greenGray * invweights[2];
+        matrix[1][3] = 0.0f;
+        matrix[2][0] = blueGray * invweights[0];
+        matrix[2][1] = blueGray * invweights[1];
+        matrix[2][2] = blueGray * invweights[2];
+        matrix[2][3] = 0.0f;
+        matrix[3][0] = 0.0f;
+        matrix[3][1] = 0.0f;
+        matrix[3][2] = 0.0f;
+        matrix[3][3] = 1.0f;
+        matrix[4][0] = weights[0];
+        matrix[4][1] = weights[1];
+        matrix[4][2] = weights[2];
+        matrix[4][3] = 0.0f;
+    }
+
+    firstTime = false;
+
+    vgColorMatrix(dstImage, srcImage, matrix[0]);
+
+    VGImage child = VG_INVALID_HANDLE;
+
+    if (srcRect.isNull() ||
+        (srcRect.topLeft().isNull() && srcRect.size() == size)) {
+        child = dstImage;
+    } else {
+        QRect src = srcRect.toRect();
+        child = vgChildImage(dstImage, src.x(), src.y(), src.width(), src.height());
+    }
+
+    qt_vg_drawVGImage(painter, dest, child);
+
+    if(child != dstImage)
+        vgDestroyImage(child);
+    vgDestroyImage(dstImage);
+}
+
+QVGPixmapDropShadowFilter::QVGPixmapDropShadowFilter()
+    : QPixmapDropShadowFilter(),
+      prevRadius(0.0f),
+      kernelSize(0),
+      firstTime(true)
+{
+}
+
+QVGPixmapDropShadowFilter::~QVGPixmapDropShadowFilter()
+{
+}
+
+void QVGPixmapDropShadowFilter::draw(QPainter *painter, const QPointF &dest, const QPixmap &src, const QRectF &srcRect) const
+{
+    if (src.pixmapData()->classId() != QPixmapData::OpenVGClass) {
+        // The pixmap data is not an instance of QVGPixmapData, so fall
+        // back to the default drop shadow filter implementation.
+        QPixmapDropShadowFilter::draw(painter, dest, src, srcRect);
+        return;
+    }
+
+    QVGPixmapData *pd = static_cast<QVGPixmapData *>(src.pixmapData());
+
+    VGImage srcImage = pd->toVGImage();
+    if (srcImage == VG_INVALID_HANDLE)
+        return;
+
+    QSize size = pd->size();
+    VGImage tmpImage = vgCreateImage
+        (VG_sARGB_8888_PRE, size.width(), size.height(),
+         VG_IMAGE_QUALITY_FASTER);
+    if (tmpImage == VG_INVALID_HANDLE)
+        return;
+
+    VGImage dstImage = vgCreateImage
+        (VG_sARGB_8888_PRE, size.width(), size.height(),
+         VG_IMAGE_QUALITY_FASTER);
+    if (dstImage == VG_INVALID_HANDLE) {
+        vgDestroyImage(tmpImage);
+        return;
+    }
+
+    // Recompute the color matrix if the color has changed.
+    QColor c = color();
+    if (c != prevColor || firstTime) {
+        prevColor = c;
+
+        matrix[0][0] = 0.0f;
+        matrix[0][1] = 0.0f;
+        matrix[0][2] = 0.0f;
+        matrix[0][3] = 0.0f;
+        matrix[1][0] = 0.0f;
+        matrix[1][1] = 0.0f;
+        matrix[1][2] = 0.0f;
+        matrix[1][3] = 0.0f;
+        matrix[2][0] = 0.0f;
+        matrix[2][1] = 0.0f;
+        matrix[2][2] = 0.0f;
+        matrix[2][3] = 0.0f;
+        matrix[3][0] = c.redF();
+        matrix[3][1] = c.greenF();
+        matrix[3][2] = c.blueF();
+        matrix[3][3] = c.alphaF();
+        matrix[4][0] = 0.0f;
+        matrix[4][1] = 0.0f;
+        matrix[4][2] = 0.0f;
+        matrix[4][3] = 0.0f;
+    }
+
+    // Blacken the source image.
+    vgColorMatrix(tmpImage, srcImage, matrix[0]);
+
+    // Recompute the convolution kernel if the blur radius has changed.
+    qreal radius = blurRadius();
+    if (radius != prevRadius || firstTime) {
+        prevRadius = radius;
+        int dim = 2 * qRound(radius) + 1;
+        int size = dim * dim;
+        VGshort f = VGshort(1024.0f / size);
+        kernel.resize(size);
+        for (int i = 0; i < size; ++i)
+            kernel[i] = f;
+        kernelSize = dim;
+    }
+
+    // Apply the convolution filter using the kernel.
+    VGfloat values[4];
+    values[0] = 0.0f;
+    values[1] = 0.0f;
+    values[2] = 0.0f;
+    values[3] = 0.0f;
+    vgSetfv(VG_TILE_FILL_COLOR, 4, values);
+    vgConvolve(dstImage, tmpImage,
+               kernelSize, kernelSize, 0, 0,
+               kernel.constData(), 1.0f / 1024.0f, 0.0f,
+               VG_TILE_FILL);
+
+    firstTime = false;
+
+    VGImage child = VG_INVALID_HANDLE;
+
+    if (srcRect.isNull() ||
+        (srcRect.topLeft().isNull() && srcRect.size() == size)) {
+        child = dstImage;
+    } else {
+        QRect src = srcRect.toRect();
+        child = vgChildImage(dstImage, src.x(), src.y(), src.width(), src.height());
+    }
+
+    qt_vg_drawVGImage(painter, dest + offset(), child);
+
+    if(child != dstImage)
+        vgDestroyImage(child);
+    vgDestroyImage(tmpImage);
+    vgDestroyImage(dstImage);
+}
+
+#endif
+
+QT_END_NAMESPACE