diff -r 000000000000 -r 1918ee327afb src/openvg/qpaintengine_vg.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/openvg/qpaintengine_vg.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,3653 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** 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 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 "qpaintengine_vg_p.h"
+#include "qpixmapdata_vg_p.h"
+#include "qpixmapfilter_vg_p.h"
+#include "qvgcompositionhelper_p.h"
+#if !defined(QT_NO_EGL)
+#include <QtGui/private/qegl_p.h>
+#include "qwindowsurface_vgegl_p.h"
+#endif
+#include <QtCore/qvarlengtharray.h>
+#include <QtGui/private/qdrawhelper_p.h>
+#include <QtGui/private/qtextureglyphcache_p.h>
+#include <QtGui/private/qtextengine_p.h>
+#include <QtGui/private/qfontengine_p.h>
+#include <QtGui/private/qpainterpath_p.h>
+#include <QDebug>
+#include <QSet>
+
+QT_BEGIN_NAMESPACE
+
+// vgDrawGlyphs() only exists in OpenVG 1.1 and higher.
+#if !defined(OPENVG_VERSION_1_1) && !defined(QVG_NO_DRAW_GLYPHS)
+#define QVG_NO_DRAW_GLYPHS 1
+#endif
+
+// vgRenderToMask() only exists in OpenVG 1.1 and higher.
+// Also, disable masking completely if we are using the scissor to clip.
+#if !defined(OPENVG_VERSION_1_1) && !defined(QVG_NO_RENDER_TO_MASK)
+#define QVG_NO_RENDER_TO_MASK 1
+#endif
+#if defined(QVG_SCISSOR_CLIP) && !defined(QVG_NO_RENDER_TO_MASK)
+#define QVG_NO_RENDER_TO_MASK 1
+#endif
+
+#if !defined(QVG_NO_DRAW_GLYPHS)
+
+extern int qt_defaultDpiX();
+extern int qt_defaultDpiY();
+
+class QVGPaintEnginePrivate;
+
+class QVGFontGlyphCache
+{
+public:
+    QVGFontGlyphCache();
+    ~QVGFontGlyphCache();
+
+    void cacheGlyphs(QVGPaintEnginePrivate *d,
+                     const QTextItemInt &ti,
+                     const QVarLengthArray<glyph_t> &glyphs);
+    void setScaleFromText(const QTextItemInt &ti);
+
+    VGFont font;
+    VGfloat scaleX;
+    VGfloat scaleY;
+    
+    uint cachedGlyphsMask[256 / 32];
+    QSet<glyph_t> cachedGlyphs;
+};
+
+typedef QHash<QFontEngine*, QVGFontGlyphCache*> QVGFontCache;
+
+#endif
+
+class QVGFontEngineCleaner : public QObject
+{
+    Q_OBJECT
+public:
+    QVGFontEngineCleaner(QVGPaintEnginePrivate *d);
+    ~QVGFontEngineCleaner();
+
+public slots:
+    void fontEngineDestroyed();
+
+private:
+    QVGPaintEnginePrivate *d_ptr;
+};
+
+class QVGPaintEnginePrivate : public QPaintEngineExPrivate
+{
+public:
+    QVGPaintEnginePrivate();
+    ~QVGPaintEnginePrivate();
+
+    void init();
+    void initObjects();
+    void destroy();
+    void setTransform(VGMatrixMode mode, const QTransform& transform);
+    void updateTransform(QPaintDevice *pdev);
+    void draw(VGPath path, const QPen& pen, const QBrush& brush, VGint rule = VG_EVEN_ODD);
+    void stroke(VGPath path, const QPen& pen);
+    void fill(VGPath path, const QBrush& brush, VGint rule = VG_EVEN_ODD);
+    VGPath vectorPathToVGPath(const QVectorPath& path);
+    VGPath painterPathToVGPath(const QPainterPath& path);
+    VGPath roundedRectPath(const QRectF &rect, qreal xRadius, qreal yRadius, Qt::SizeMode mode);
+    VGPaintType setBrush
+        (VGPaint paint, const QBrush& brush, VGMatrixMode mode,
+         VGPaintType prevPaintType);
+    void setPenParams(const QPen& pen);
+    void setBrushTransform(const QBrush& brush, VGMatrixMode mode);
+    void setupColorRamp(const QGradient *grad, VGPaint paint);
+    void setImageOptions();
+#if !defined(QVG_SCISSOR_CLIP)
+    void ensureMask(QVGPaintEngine *engine, int width, int height);
+    void modifyMask
+        (QVGPaintEngine *engine, VGMaskOperation op, const QRegion& region);
+    void modifyMask
+        (QVGPaintEngine *engine, VGMaskOperation op, const QRect& rect);
+#endif
+
+    VGint maxScissorRects;  // Maximum scissor rectangles for clipping.
+
+    VGPaint penPaint;       // Paint for currently active pen.
+    VGPaint brushPaint;     // Paint for currently active brush.
+    VGPaint opacityPaint;   // Paint for drawing images with opacity.
+    VGPaint fillPaint;      // Current fill paint that is active.
+
+    QPen currentPen;        // Current pen set in "penPaint".
+    QBrush currentBrush;    // Current brush set in "brushPaint".
+
+    bool forcePenChange;    // Force a pen change, even if the same.
+    bool forceBrushChange;  // Force a brush change, even if the same.
+
+    VGPaintType penType;    // Type of the last pen that was set.
+    VGPaintType brushType;  // Type of the last brush that was set.
+
+    QPointF brushOrigin;    // Current brush origin.
+
+    VGint fillRule;         // Last fill rule that was set.
+
+    qreal opacity;          // Current drawing opacity.
+    qreal paintOpacity;     // Opacity in opacityPaint.
+
+#if !defined(QVG_NO_MODIFY_PATH)
+    VGPath rectPath;        // Cached path for quick drawing of rectangles.
+    VGPath linePath;        // Cached path for quick drawing of lines.
+    VGPath roundRectPath;   // Cached path for quick drawing of rounded rects.
+#endif
+
+    QTransform transform;   // Currently active transform.
+    bool simpleTransform;   // True if the transform is simple (non-projective).
+    qreal penScale;         // Pen scaling factor from "transform".
+
+    QTransform pathTransform;  // Calculated VG path transformation.
+    QTransform imageTransform; // Calculated VG image transformation.
+    bool pathTransformSet;  // True if path transform set in the VG context.
+
+    bool maskValid;         // True if vgMask() contains valid data.
+    bool maskIsSet;         // True if mask would be fully set if it was valid.
+    bool rawVG;             // True if processing a raw VG escape.
+
+    QRect maskRect;         // Rectangle version of mask if it is simple.
+
+    QTransform penTransform;   // Transform for the pen.
+    QTransform brushTransform; // Transform for the brush.
+
+    VGMatrixMode matrixMode;    // Last matrix mode that was set.
+    VGImageMode imageMode;      // Last image mode that was set.
+
+    QRegion scissorRegion;  // Currently active scissor region.
+    bool scissorActive;     // True if scissor region is active.
+
+    QPaintEngine::DirtyFlags dirty;
+
+    QColor clearColor;      // Last clear color that was set.
+    VGfloat clearOpacity;   // Opacity during the last clear.
+
+    VGBlendMode blendMode;  // Active blend mode.
+    VGRenderingQuality renderingQuality; // Active rendering quality.
+    VGImageQuality imageQuality;    // Active image quality.
+
+#if !defined(QVG_NO_DRAW_GLYPHS)
+    QVGFontCache fontCache;
+    QVGFontEngineCleaner *fontEngineCleaner;
+#endif
+
+    QScopedPointer<QPixmapFilter> convolutionFilter;
+    QScopedPointer<QPixmapFilter> colorizeFilter;
+    QScopedPointer<QPixmapFilter> dropShadowFilter;
+    QScopedPointer<QPixmapFilter> blurFilter;
+
+    // Ensure that the path transform is properly set in the VG context
+    // before we perform a vgDrawPath() operation.
+    inline void ensurePathTransform()
+    {
+        if (!pathTransformSet) {
+            setTransform(VG_MATRIX_PATH_USER_TO_SURFACE, pathTransform);
+            pathTransformSet = true;
+        }
+    }
+
+    // Ensure that a specific pen has been set into penPaint.
+    inline void ensurePen(const QPen& pen) {
+        if (forcePenChange || pen != currentPen) {
+            currentPen = pen;
+            forcePenChange = false;
+            penType = setBrush
+                (penPaint, pen.brush(),
+                 VG_MATRIX_STROKE_PAINT_TO_USER, penType);
+            setPenParams(pen);
+        }
+    }
+
+    // Ensure that a specific brush has been set into brushPaint.
+    inline void ensureBrush(const QBrush& brush) {
+        if (forceBrushChange || brush != currentBrush) {
+            currentBrush = brush;
+            forceBrushChange = false;
+            brushType = setBrush
+                (brushPaint, brush, VG_MATRIX_FILL_PAINT_TO_USER, brushType);
+        }
+        if (fillPaint != brushPaint) {
+            vgSetPaint(brushPaint, VG_FILL_PATH);
+            fillPaint = brushPaint;
+        }
+    }
+
+    // Set various modes, but only if different.
+    inline void setImageMode(VGImageMode mode);
+    inline void setRenderingQuality(VGRenderingQuality mode);
+    inline void setImageQuality(VGImageQuality mode);
+    inline void setBlendMode(VGBlendMode mode);
+    inline void setFillRule(VGint mode);
+
+    // Clear all lazily-set modes.
+    void clearModes();
+};
+
+inline void QVGPaintEnginePrivate::setImageMode(VGImageMode mode)
+{
+    if (imageMode != mode) {
+        imageMode = mode;
+        vgSeti(VG_IMAGE_MODE, mode);
+    }
+}
+
+inline void QVGPaintEnginePrivate::setRenderingQuality(VGRenderingQuality mode)
+{
+    if (renderingQuality != mode) {
+        vgSeti(VG_RENDERING_QUALITY, mode);
+        renderingQuality = mode;
+    }
+}
+
+inline void QVGPaintEnginePrivate::setImageQuality(VGImageQuality mode)
+{
+    if (imageQuality != mode) {
+        vgSeti(VG_IMAGE_QUALITY, mode);
+        imageQuality = mode;
+    }
+}
+
+inline void QVGPaintEnginePrivate::setBlendMode(VGBlendMode mode)
+{
+    if (blendMode != mode) {
+        vgSeti(VG_BLEND_MODE, mode);
+        blendMode = mode;
+    }
+}
+
+inline void QVGPaintEnginePrivate::setFillRule(VGint mode)
+{
+    if (fillRule != mode) {
+        fillRule = mode;
+        vgSeti(VG_FILL_RULE, mode);
+    }
+}
+
+void QVGPaintEnginePrivate::clearModes()
+{
+    matrixMode = (VGMatrixMode)0;
+    imageMode = (VGImageMode)0;
+    blendMode = (VGBlendMode)0;
+    renderingQuality = (VGRenderingQuality)0;
+    imageQuality = (VGImageQuality)0;
+}
+
+QVGPaintEnginePrivate::QVGPaintEnginePrivate()
+{
+    init();
+}
+
+void QVGPaintEnginePrivate::init()
+{
+    maxScissorRects = 0;
+
+    penPaint = 0;
+    brushPaint = 0;
+    opacityPaint = 0;
+    fillPaint = 0;
+
+    forcePenChange = true;
+    forceBrushChange = true;
+    penType = (VGPaintType)0;
+    brushType = (VGPaintType)0;
+
+    brushOrigin = QPointF(0.0f, 0.0f);
+
+    fillRule = 0;
+
+    opacity = 1.0;
+    paintOpacity = 1.0f;
+
+#if !defined(QVG_NO_MODIFY_PATH)
+    rectPath = 0;
+    linePath = 0;
+    roundRectPath = 0;
+#endif
+
+    simpleTransform = true;
+    pathTransformSet = false;
+    penScale = 1.0;
+
+    maskValid = false;
+    maskIsSet = false;
+    rawVG = false;
+
+    scissorActive = false;
+
+    dirty = 0;
+
+    clearOpacity = 1.0f;
+
+#if !defined(QVG_NO_DRAW_GLYPHS)
+    fontEngineCleaner = 0;
+#endif
+
+    clearModes();
+}
+
+QVGPaintEnginePrivate::~QVGPaintEnginePrivate()
+{
+    destroy();
+}
+
+void QVGPaintEnginePrivate::initObjects()
+{
+    maxScissorRects = vgGeti(VG_MAX_SCISSOR_RECTS);
+
+    penPaint = vgCreatePaint();
+    vgSetParameteri(penPaint, VG_PAINT_TYPE, VG_PAINT_TYPE_COLOR);
+    vgSetPaint(penPaint, VG_STROKE_PATH);
+
+    vgSeti(VG_MATRIX_MODE, VG_MATRIX_STROKE_PAINT_TO_USER);
+    vgLoadIdentity();
+
+    brushPaint = vgCreatePaint();
+    vgSetParameteri(brushPaint, VG_PAINT_TYPE, VG_PAINT_TYPE_COLOR);
+    vgSetPaint(brushPaint, VG_FILL_PATH);
+    fillPaint = brushPaint;
+
+    vgSeti(VG_MATRIX_MODE, VG_MATRIX_FILL_PAINT_TO_USER);
+    vgLoadIdentity();
+    matrixMode = VG_MATRIX_FILL_PAINT_TO_USER;
+
+    opacityPaint = vgCreatePaint();
+    vgSetParameteri(opacityPaint, VG_PAINT_TYPE, VG_PAINT_TYPE_COLOR);
+    VGfloat values[4];
+    values[0] = 1.0f;
+    values[1] = 1.0f;
+    values[2] = 1.0f;
+    values[3] = paintOpacity;
+    vgSetParameterfv(opacityPaint, VG_PAINT_COLOR, 4, values);
+
+#if !defined(QVG_NO_MODIFY_PATH)
+    // Create a dummy path for rectangle drawing, which we can
+    // modify later with vgModifyPathCoords().  This should be
+    // faster than constantly creating and destroying paths.
+    rectPath = vgCreatePath(VG_PATH_FORMAT_STANDARD,
+                            VG_PATH_DATATYPE_F,
+                            1.0f, // scale
+                            0.0f, // bias
+                            5,    // segmentCapacityHint
+                            8,    // coordCapacityHint
+                            VG_PATH_CAPABILITY_ALL);
+    static VGubyte const segments[5] = {
+        VG_MOVE_TO_ABS,
+        VG_LINE_TO_ABS,
+        VG_LINE_TO_ABS,
+        VG_LINE_TO_ABS,
+        VG_CLOSE_PATH
+    };
+    VGfloat coords[8];
+    coords[0] = 0.0f;
+    coords[1] = 0.0f;
+    coords[2] = 100.0f;
+    coords[3] = coords[1];
+    coords[4] = coords[2];
+    coords[5] = 100.0f;
+    coords[6] = coords[0];
+    coords[7] = coords[5];
+    vgAppendPathData(rectPath, 5, segments, coords);
+
+    // Create a dummy line drawing path as well.
+    linePath = vgCreatePath(VG_PATH_FORMAT_STANDARD,
+                            VG_PATH_DATATYPE_F,
+                            1.0f, // scale
+                            0.0f, // bias
+                            2,    // segmentCapacityHint
+                            4,    // coordCapacityHint
+                            VG_PATH_CAPABILITY_ALL);
+    vgAppendPathData(linePath, 2, segments, coords);
+#endif
+}
+
+void QVGPaintEnginePrivate::destroy()
+{
+    if (penPaint)
+        vgDestroyPaint(penPaint);
+    if (brushPaint)
+        vgDestroyPaint(brushPaint);
+    if (opacityPaint)
+        vgDestroyPaint(opacityPaint);
+
+#if !defined(QVG_NO_MODIFY_PATH)
+    if (rectPath)
+        vgDestroyPath(rectPath);
+    if (linePath)
+        vgDestroyPath(linePath);
+    if (roundRectPath)
+        vgDestroyPath(roundRectPath);
+#endif
+
+#if !defined(QVG_NO_DRAW_GLYPHS)
+    QVGFontCache::Iterator it;
+    for (it = fontCache.begin(); it != fontCache.end(); ++it)
+        delete it.value();
+    fontCache.clear();
+    delete fontEngineCleaner;
+#endif
+}
+
+// Set a specific VG transformation matrix in the current VG context.
+void QVGPaintEnginePrivate::setTransform
+        (VGMatrixMode mode, const QTransform& transform)
+{
+    VGfloat mat[9];
+    if (mode != matrixMode) {
+        vgSeti(VG_MATRIX_MODE, mode);
+        matrixMode = mode;
+    }
+    mat[0] = transform.m11();
+    mat[1] = transform.m12();
+    mat[2] = transform.m13();
+    mat[3] = transform.m21();
+    mat[4] = transform.m22();
+    mat[5] = transform.m23();
+    mat[6] = transform.m31();
+    mat[7] = transform.m32();
+    mat[8] = transform.m33();
+    vgLoadMatrix(mat);
+}
+
+extern bool qt_scaleForTransform(const QTransform &transform, qreal *scale);
+
+void QVGPaintEnginePrivate::updateTransform(QPaintDevice *pdev)
+{
+    VGfloat devh = pdev->height() - 1;
+
+    // Construct the VG transform by combining the Qt transform with
+    // the following viewport transformation:
+    //        | 1  0  0   |   | 1 0  0.5 |   | 1  0     0.5      |
+    //        | 0 -1 devh | * | 0 1 -0.5 | = | 0 -1 (0.5 + devh) |
+    //        | 0  0  1   |   | 0 0   1  |   | 0  0      1       |
+    // The full VG transform is effectively:
+    //      1. Apply the user's transformation matrix.
+    //      2. Translate by (0.5, -0.5) to correct for Qt and VG putting
+    //         the centre of the pixel at different positions.
+    //      3. Flip the co-ordinate system upside down.
+    QTransform viewport(1.0f, 0.0f, 0.0f,
+                        0.0f, -1.0f, 0.0f,
+                        0.5f, devh + 0.5f, 1.0f);
+
+    // The image transform is always the full transformation,
+    // because it can be projective.
+    imageTransform = transform * viewport;
+
+    // Determine if the transformation is projective.
+    bool projective = (imageTransform.m13() != 0.0f ||
+                       imageTransform.m23() != 0.0f ||
+                       imageTransform.m33() != 1.0f);
+    if (projective) {
+        // The engine cannot do projective path transforms for us,
+        // so we will have to convert the co-ordinates ourselves.
+        // Change the matrix to just the viewport transformation.
+        pathTransform = viewport;
+        simpleTransform = false;
+    } else {
+        pathTransform = imageTransform;
+        simpleTransform = true;
+    }
+    pathTransformSet = false;
+
+    // Calculate the scaling factor to use for turning cosmetic pens
+    // into ordinary non-cosmetic pens.
+    qt_scaleForTransform(transform, &penScale);
+}
+
+VGPath QVGPaintEnginePrivate::vectorPathToVGPath(const QVectorPath& path)
+{
+    int count = path.elementCount();
+    const qreal *points = path.points();
+    const QPainterPath::ElementType *elements = path.elements();
+
+    VGPath vgpath = vgCreatePath(VG_PATH_FORMAT_STANDARD,
+                                 VG_PATH_DATATYPE_F,
+                                 1.0f,        // scale
+                                 0.0f,        // bias
+                                 count + 1,   // segmentCapacityHint
+                                 count * 2,   // coordCapacityHint
+                                 VG_PATH_CAPABILITY_ALL);
+
+    // Size is sufficient segments for drawRoundedRect() paths.
+    QVarLengthArray<VGubyte, 20> segments;
+
+    if (sizeof(qreal) == sizeof(VGfloat) && elements && simpleTransform) {
+        // If Qt was compiled with qreal the same size as VGfloat,
+        // then convert the segment types and use the incoming
+        // points array directly.
+        for (int i = 0; i < count; ++i) {
+            switch (elements[i]) {
+
+            case QPainterPath::MoveToElement:
+                segments.append(VG_MOVE_TO_ABS); break;
+
+            case QPainterPath::LineToElement:
+                segments.append(VG_LINE_TO_ABS); break;
+
+            case QPainterPath::CurveToElement:
+                segments.append(VG_CUBIC_TO_ABS); break;
+
+            case QPainterPath::CurveToDataElement: break;
+
+            }
+        }
+        if (path.hasImplicitClose())
+            segments.append(VG_CLOSE_PATH);
+
+        vgAppendPathData(vgpath, segments.count(), segments.constData(),
+                         reinterpret_cast<const VGfloat *>(points));
+
+        return vgpath;
+    }
+
+    // Sizes chosen so that drawRoundedRect() paths fit in these arrays.
+    QVarLengthArray<VGfloat, 48> coords;
+
+    int curvePos = 0;
+    QPointF temp;
+
+    if (elements && simpleTransform) {
+        // Convert the members of the element array.
+        for (int i = 0; i < count; ++i) {
+            switch (elements[i]) {
+
+            case QPainterPath::MoveToElement:
+            {
+                coords.append(points[0]);
+                coords.append(points[1]);
+                segments.append(VG_MOVE_TO_ABS);
+            }
+            break;
+
+            case QPainterPath::LineToElement:
+            {
+                coords.append(points[0]);
+                coords.append(points[1]);
+                segments.append(VG_LINE_TO_ABS);
+            }
+            break;
+
+            case QPainterPath::CurveToElement:
+            {
+                coords.append(points[0]);
+                coords.append(points[1]);
+                curvePos = 2;
+            }
+            break;
+
+            case QPainterPath::CurveToDataElement:
+            {
+                coords.append(points[0]);
+                coords.append(points[1]);
+                curvePos += 2;
+                if (curvePos == 6) {
+                    curvePos = 0;
+                    segments.append(VG_CUBIC_TO_ABS);
+                }
+            }
+            break;
+
+            }
+            points += 2;
+        }
+    } else if (elements && !simpleTransform) {
+        // Convert the members of the element array after applying the
+        // current transform to the path locally.
+        for (int i = 0; i < count; ++i) {
+            switch (elements[i]) {
+
+            case QPainterPath::MoveToElement:
+            {
+                temp = transform.map(QPointF(points[0], points[1]));
+                coords.append(temp.x());
+                coords.append(temp.y());
+                segments.append(VG_MOVE_TO_ABS);
+            }
+            break;
+
+            case QPainterPath::LineToElement:
+            {
+                temp = transform.map(QPointF(points[0], points[1]));
+                coords.append(temp.x());
+                coords.append(temp.y());
+                segments.append(VG_LINE_TO_ABS);
+            }
+            break;
+
+            case QPainterPath::CurveToElement:
+            {
+                temp = transform.map(QPointF(points[0], points[1]));
+                coords.append(temp.x());
+                coords.append(temp.y());
+                curvePos = 2;
+            }
+            break;
+
+            case QPainterPath::CurveToDataElement:
+            {
+                temp = transform.map(QPointF(points[0], points[1]));
+                coords.append(temp.x());
+                coords.append(temp.y());
+                curvePos += 2;
+                if (curvePos == 6) {
+                    curvePos = 0;
+                    segments.append(VG_CUBIC_TO_ABS);
+                }
+            }
+            break;
+
+            }
+            points += 2;
+        }
+    } else if (count > 0 && simpleTransform) {
+        // If there is no element array, then the path is assumed
+        // to be a MoveTo followed by several LineTo's.
+        coords.append(points[0]);
+        coords.append(points[1]);
+        segments.append(VG_MOVE_TO_ABS);
+        while (count > 1) {
+            points += 2;
+            coords.append(points[0]);
+            coords.append(points[1]);
+            segments.append(VG_LINE_TO_ABS);
+            --count;
+        }
+    } else if (count > 0 && !simpleTransform) {
+        // Convert a simple path, and apply the transform locally.
+        temp = transform.map(QPointF(points[0], points[1]));
+        coords.append(temp.x());
+        coords.append(temp.y());
+        segments.append(VG_MOVE_TO_ABS);
+        while (count > 1) {
+            points += 2;
+            temp = transform.map(QPointF(points[0], points[1]));
+            coords.append(temp.x());
+            coords.append(temp.y());
+            segments.append(VG_LINE_TO_ABS);
+            --count;
+        }
+    }
+
+    // Close the path if specified.
+    if (path.hasImplicitClose())
+        segments.append(VG_CLOSE_PATH);
+
+    vgAppendPathData(vgpath, segments.count(),
+                     segments.constData(), coords.constData());
+
+    return vgpath;
+}
+
+VGPath QVGPaintEnginePrivate::painterPathToVGPath(const QPainterPath& path)
+{
+    int count = path.elementCount();
+
+    VGPath vgpath = vgCreatePath(VG_PATH_FORMAT_STANDARD,
+                                 VG_PATH_DATATYPE_F,
+                                 1.0f,        // scale
+                                 0.0f,        // bias
+                                 count + 1,   // segmentCapacityHint
+                                 count * 2,   // coordCapacityHint
+                                 VG_PATH_CAPABILITY_ALL);
+
+    if (count == 0)
+        return vgpath;
+
+    const QPainterPath::Element *elements = &(path.elementAt(0));
+
+    // Sizes chosen so that drawRoundedRect() paths fit in these arrays.
+    QVarLengthArray<VGfloat, 48> coords;
+    QVarLengthArray<VGubyte, 20> segments;
+
+    int curvePos = 0;
+    QPointF temp;
+
+    // Keep track of the start and end of each sub-path.  QPainterPath
+    // does not have an "implicit close" flag like QVectorPath does.
+    // We therefore have to detect closed paths by looking for a LineTo
+    // element that connects back to the initial MoveTo element.
+    qreal startx = 0.0;
+    qreal starty = 0.0;
+    qreal endx = 0.0;
+    qreal endy = 0.0;
+    bool haveStart = false;
+    bool haveEnd = false;
+
+    if (simpleTransform) {
+        // Convert the members of the element array.
+        for (int i = 0; i < count; ++i) {
+            switch (elements[i].type) {
+
+            case QPainterPath::MoveToElement:
+            {
+                if (haveStart && haveEnd && startx == endx && starty == endy) {
+                    // Implicitly close the previous sub-path.
+                    segments.append(VG_CLOSE_PATH);
+                }
+                startx = elements[i].x;
+                starty = elements[i].y;
+                coords.append(startx);
+                coords.append(starty);
+                haveStart = true;
+                haveEnd = false;
+                segments.append(VG_MOVE_TO_ABS);
+            }
+            break;
+
+            case QPainterPath::LineToElement:
+            {
+                endx = elements[i].x;
+                endy = elements[i].y;
+                coords.append(endx);
+                coords.append(endy);
+                haveEnd = true;
+                segments.append(VG_LINE_TO_ABS);
+            }
+            break;
+
+            case QPainterPath::CurveToElement:
+            {
+                coords.append(elements[i].x);
+                coords.append(elements[i].y);
+                haveEnd = false;
+                curvePos = 2;
+            }
+            break;
+
+            case QPainterPath::CurveToDataElement:
+            {
+                coords.append(elements[i].x);
+                coords.append(elements[i].y);
+                haveEnd = false;
+                curvePos += 2;
+                if (curvePos == 6) {
+                    curvePos = 0;
+                    segments.append(VG_CUBIC_TO_ABS);
+                }
+            }
+            break;
+
+            }
+        }
+    } else {
+        // Convert the members of the element array after applying the
+        // current transform to the path locally.
+        for (int i = 0; i < count; ++i) {
+            switch (elements[i].type) {
+
+            case QPainterPath::MoveToElement:
+            {
+                if (haveStart && haveEnd && startx == endx && starty == endy) {
+                    // Implicitly close the previous sub-path.
+                    segments.append(VG_CLOSE_PATH);
+                }
+                temp = transform.map(QPointF(elements[i].x, elements[i].y));
+                startx = temp.x();
+                starty = temp.y();
+                coords.append(startx);
+                coords.append(starty);
+                haveStart = true;
+                haveEnd = false;
+                segments.append(VG_MOVE_TO_ABS);
+            }
+            break;
+
+            case QPainterPath::LineToElement:
+            {
+                temp = transform.map(QPointF(elements[i].x, elements[i].y));
+                endx = temp.x();
+                endy = temp.y();
+                coords.append(endx);
+                coords.append(endy);
+                haveEnd = true;
+                segments.append(VG_LINE_TO_ABS);
+            }
+            break;
+
+            case QPainterPath::CurveToElement:
+            {
+                temp = transform.map(QPointF(elements[i].x, elements[i].y));
+                coords.append(temp.x());
+                coords.append(temp.y());
+                haveEnd = false;
+                curvePos = 2;
+            }
+            break;
+
+            case QPainterPath::CurveToDataElement:
+            {
+                temp = transform.map(QPointF(elements[i].x, elements[i].y));
+                coords.append(temp.x());
+                coords.append(temp.y());
+                haveEnd = false;
+                curvePos += 2;
+                if (curvePos == 6) {
+                    curvePos = 0;
+                    segments.append(VG_CUBIC_TO_ABS);
+                }
+            }
+            break;
+
+            }
+        }
+    }
+
+    if (haveStart && haveEnd && startx == endx && starty == endy) {
+        // Implicitly close the last sub-path.
+        segments.append(VG_CLOSE_PATH);
+    }
+
+    vgAppendPathData(vgpath, segments.count(),
+                     segments.constData(), coords.constData());
+
+    return vgpath;
+}
+
+VGPath QVGPaintEnginePrivate::roundedRectPath(const QRectF &rect, qreal xRadius, qreal yRadius, Qt::SizeMode mode)
+{
+    static VGubyte roundedrect_types[] = {
+        VG_MOVE_TO_ABS,
+        VG_LINE_TO_ABS,
+        VG_CUBIC_TO_ABS,
+        VG_LINE_TO_ABS,
+        VG_CUBIC_TO_ABS,
+        VG_LINE_TO_ABS,
+        VG_CUBIC_TO_ABS,
+        VG_LINE_TO_ABS,
+        VG_CUBIC_TO_ABS,
+        VG_CLOSE_PATH
+    };
+
+    qreal x1 = rect.left();
+    qreal x2 = rect.right();
+    qreal y1 = rect.top();
+    qreal y2 = rect.bottom();
+
+    if (mode == Qt::RelativeSize) {
+        xRadius = xRadius * rect.width() / 200.;
+        yRadius = yRadius * rect.height() / 200.;
+    }
+
+    xRadius = qMin(xRadius, rect.width() / 2);
+    yRadius = qMin(yRadius, rect.height() / 2);
+
+    VGfloat pts[] = {
+        x1 + xRadius, y1,                   // MoveTo
+        x2 - xRadius, y1,                   // LineTo
+        x2 - (1 - KAPPA) * xRadius, y1,     // CurveTo
+        x2, y1 + (1 - KAPPA) * yRadius,
+        x2, y1 + yRadius,
+        x2, y2 - yRadius,                   // LineTo
+        x2, y2 - (1 - KAPPA) * yRadius,     // CurveTo
+        x2 - (1 - KAPPA) * xRadius, y2,
+        x2 - xRadius, y2,
+        x1 + xRadius, y2,                   // LineTo
+        x1 + (1 - KAPPA) * xRadius, y2,     // CurveTo
+        x1, y2 - (1 - KAPPA) * yRadius,
+        x1, y2 - yRadius,
+        x1, y1 + yRadius,                   // LineTo
+        x1, y1 + KAPPA * yRadius,           // CurveTo
+        x1 + (1 - KAPPA) * xRadius, y1,
+        x1 + xRadius, y1
+    };
+
+#if !defined(QVG_NO_MODIFY_PATH)
+    VGPath vgpath = roundRectPath;
+    if (!vgpath) {
+        vgpath = vgCreatePath(VG_PATH_FORMAT_STANDARD,
+                              VG_PATH_DATATYPE_F,
+                              1.0f,        // scale
+                              0.0f,        // bias
+                              10,          // segmentCapacityHint
+                              17 * 2,      // coordCapacityHint
+                              VG_PATH_CAPABILITY_ALL);
+        vgAppendPathData(vgpath, 10, roundedrect_types, pts);
+        roundRectPath = vgpath;
+    } else {
+        vgModifyPathCoords(vgpath, 0, 9, pts);
+    }
+#else
+    VGPath vgpath = vgCreatePath(VG_PATH_FORMAT_STANDARD,
+                                 VG_PATH_DATATYPE_F,
+                                 1.0f,        // scale
+                                 0.0f,        // bias
+                                 10,          // segmentCapacityHint
+                                 17 * 2,      // coordCapacityHint
+                                 VG_PATH_CAPABILITY_ALL);
+    vgAppendPathData(vgpath, 10, roundedrect_types, pts);
+#endif
+
+    return vgpath;
+}
+
+extern QImage qt_imageForBrush(int style, bool invert);
+
+static QImage colorizeBitmap(const QImage &image, const QColor &color)
+{
+    QImage sourceImage = image.convertToFormat(QImage::Format_MonoLSB);
+    QImage dest = QImage(sourceImage.size(), QImage::Format_ARGB32_Premultiplied);
+
+    QRgb fg = PREMUL(color.rgba());
+    QRgb bg = 0;
+
+    int height = sourceImage.height();
+    int width = sourceImage.width();
+    for (int y=0; y<height; ++y) {
+        uchar *source = sourceImage.scanLine(y);
+        QRgb *target = reinterpret_cast<QRgb *>(dest.scanLine(y));
+        for (int x=0; x < width; ++x)
+            target[x] = (source[x>>3] >> (x&7)) & 1 ? fg : bg;
+    }
+    return dest;
+}
+
+static VGImage toVGImage
+    (const QImage & image, Qt::ImageConversionFlags flags = Qt::AutoColor)
+{
+    QImage img(image);
+
+    VGImageFormat format;
+    switch (img.format()) {
+    case QImage::Format_Mono:
+        img = image.convertToFormat(QImage::Format_MonoLSB, flags);
+        format = VG_BW_1;
+        break;
+    case QImage::Format_MonoLSB:
+        format = VG_BW_1;
+        break;
+    case QImage::Format_RGB32:
+        format = VG_sXRGB_8888;
+        break;
+    case QImage::Format_ARGB32:
+        format = VG_sARGB_8888;
+        break;
+    case QImage::Format_ARGB32_Premultiplied:
+        format = VG_sARGB_8888_PRE;
+        break;
+    case QImage::Format_RGB16:
+        format = VG_sRGB_565;
+        break;
+    default:
+        // Convert everything else into ARGB32_Premultiplied.
+        img = image.convertToFormat(QImage::Format_ARGB32_Premultiplied, flags);
+        format = VG_sARGB_8888_PRE;
+        break;
+    }
+
+    const uchar *pixels = img.bits();
+
+    VGImage vgImg = vgCreateImage
+        (format, img.width(), img.height(), VG_IMAGE_QUALITY_FASTER);
+    vgImageSubData
+        (vgImg, pixels, img.bytesPerLine(), format, 0, 0,
+         img.width(), img.height());
+
+    return vgImg;
+}
+
+static VGImage toVGImageSubRect
+    (const QImage & image, const QRect& sr,
+     Qt::ImageConversionFlags flags = Qt::AutoColor)
+{
+    QImage img(image);
+
+    VGImageFormat format;
+    int bpp = 4;
+
+    switch (img.format()) {
+    case QImage::Format_Mono:
+    case QImage::Format_MonoLSB:
+        return VG_INVALID_HANDLE;
+    case QImage::Format_RGB32:
+        format = VG_sXRGB_8888;
+        break;
+    case QImage::Format_ARGB32:
+        format = VG_sARGB_8888;
+        break;
+    case QImage::Format_ARGB32_Premultiplied:
+        format = VG_sARGB_8888_PRE;
+        break;
+    case QImage::Format_RGB16:
+        format = VG_sRGB_565;
+        bpp = 2;
+        break;
+    default:
+        // Convert everything else into ARGB32_Premultiplied.
+        img = image.convertToFormat(QImage::Format_ARGB32_Premultiplied, flags);
+        format = VG_sARGB_8888_PRE;
+        break;
+    }
+
+    const uchar *pixels = img.bits() + bpp * sr.x() +
+                          img.bytesPerLine() * sr.y();
+
+    VGImage vgImg = vgCreateImage
+        (format, sr.width(), sr.height(), VG_IMAGE_QUALITY_FASTER);
+    vgImageSubData
+        (vgImg, pixels, img.bytesPerLine(), format, 0, 0,
+         sr.width(), sr.height());
+
+    return vgImg;
+}
+
+static VGImage toVGImageWithOpacity(const QImage & image, qreal opacity)
+{
+    QImage img(image.size(), QImage::Format_ARGB32_Premultiplied);
+    img.fill(0);
+    QPainter painter;
+    painter.begin(&img);
+    painter.setOpacity(opacity);
+    painter.drawImage(0, 0, image);
+    painter.end();
+
+    const uchar *pixels = img.bits();
+
+    VGImage vgImg = vgCreateImage
+        (VG_sARGB_8888_PRE, img.width(), img.height(), VG_IMAGE_QUALITY_FASTER);
+    vgImageSubData
+        (vgImg, pixels, img.bytesPerLine(), VG_sARGB_8888_PRE, 0, 0,
+         img.width(), img.height());
+
+    return vgImg;
+}
+
+static VGImage toVGImageWithOpacitySubRect
+    (const QImage & image, qreal opacity, const QRect& sr)
+{
+    QImage img(sr.size(), QImage::Format_ARGB32_Premultiplied);
+    img.fill(0);
+    QPainter painter;
+    painter.begin(&img);
+    painter.setOpacity(opacity);
+    painter.drawImage(QPoint(0, 0), image, sr);
+    painter.end();
+
+    const uchar *pixels = img.bits();
+
+    VGImage vgImg = vgCreateImage
+        (VG_sARGB_8888_PRE, img.width(), img.height(), VG_IMAGE_QUALITY_FASTER);
+    vgImageSubData
+        (vgImg, pixels, img.bytesPerLine(), VG_sARGB_8888_PRE, 0, 0,
+         img.width(), img.height());
+
+    return vgImg;
+}
+
+VGPaintType QVGPaintEnginePrivate::setBrush
+        (VGPaint paint, const QBrush& brush, VGMatrixMode mode,
+         VGPaintType prevType)
+{
+    VGfloat values[5];
+    setBrushTransform(brush, mode);
+
+    // Reset the paint pattern on the brush, which will discard
+    // the previous VGImage if one was set.
+    if (prevType == VG_PAINT_TYPE_PATTERN || prevType == (VGPaintType)0)
+        vgPaintPattern(paint, VG_INVALID_HANDLE);
+
+    switch (brush.style()) {
+
+    case Qt::SolidPattern: {
+        // The brush is a solid color.
+        QColor color(brush.color());
+        values[0] = color.redF();
+        values[1] = color.greenF();
+        values[2] = color.blueF();
+        values[3] = color.alphaF() * opacity;
+        if (prevType != VG_PAINT_TYPE_COLOR)
+            vgSetParameteri(paint, VG_PAINT_TYPE, VG_PAINT_TYPE_COLOR);
+        vgSetParameterfv(paint, VG_PAINT_COLOR, 4, values);
+        return VG_PAINT_TYPE_COLOR;
+    }
+
+    case Qt::LinearGradientPattern: {
+        // The brush is a linear gradient.
+        Q_ASSERT(brush.gradient()->type() == QGradient::LinearGradient);
+        const QLinearGradient *grad =
+            static_cast<const QLinearGradient*>(brush.gradient());
+        values[0] = grad->start().x();
+        values[1] = grad->start().y();
+        values[2] = grad->finalStop().x();
+        values[3] = grad->finalStop().y();
+        if (prevType != VG_PAINT_TYPE_LINEAR_GRADIENT)
+            vgSetParameteri(paint, VG_PAINT_TYPE, VG_PAINT_TYPE_LINEAR_GRADIENT);
+        vgSetParameterfv(paint, VG_PAINT_LINEAR_GRADIENT, 4, values);
+        setupColorRamp(grad, paint);
+        return VG_PAINT_TYPE_LINEAR_GRADIENT;
+    }
+
+    case Qt::RadialGradientPattern: {
+        // The brush is a radial gradient.
+        Q_ASSERT(brush.gradient()->type() == QGradient::RadialGradient);
+        const QRadialGradient *grad =
+            static_cast<const QRadialGradient*>(brush.gradient());
+        values[0] = grad->center().x();
+        values[1] = grad->center().y();
+        values[2] = grad->focalPoint().x();
+        values[3] = grad->focalPoint().y();
+        values[4] = grad->radius();
+        if (prevType != VG_PAINT_TYPE_RADIAL_GRADIENT)
+            vgSetParameteri(paint, VG_PAINT_TYPE, VG_PAINT_TYPE_RADIAL_GRADIENT);
+        vgSetParameterfv(paint, VG_PAINT_RADIAL_GRADIENT, 5, values);
+        setupColorRamp(grad, paint);
+        return VG_PAINT_TYPE_RADIAL_GRADIENT;
+    }
+
+    case Qt::TexturePattern: {
+        // The brush is a texture specified by a QPixmap/QImage.
+        QPixmapData *pd = brush.texture().pixmapData();
+        VGImage vgImg;
+        bool deref = false;
+        if (pd->pixelType() == QPixmapData::BitmapType) {
+            // Colorize bitmaps using the brush color and opacity.
+            QColor color = brush.color();
+            if (opacity != 1.0)
+                color.setAlphaF(color.alphaF() * opacity);
+            QImage image = colorizeBitmap(*(pd->buffer()), color);
+            vgImg = toVGImage(image);
+            deref = true;
+        } else if (opacity == 1.0) {
+            if (pd->classId() == QPixmapData::OpenVGClass) {
+                QVGPixmapData *vgpd = static_cast<QVGPixmapData *>(pd);
+                vgImg = vgpd->toVGImage();
+            } else {
+                vgImg = toVGImage(*(pd->buffer()));
+                deref = true;
+            }
+        } else if (pd->classId() == QPixmapData::OpenVGClass) {
+            QVGPixmapData *vgpd = static_cast<QVGPixmapData *>(pd);
+            vgImg = vgpd->toVGImage(opacity);
+        } else {
+            vgImg = toVGImageWithOpacity(*(pd->buffer()), opacity);
+            deref = true;
+        }
+        if (vgImg == VG_INVALID_HANDLE)
+            break;
+        if (prevType != VG_PAINT_TYPE_PATTERN)
+            vgSetParameteri(paint, VG_PAINT_TYPE, VG_PAINT_TYPE_PATTERN);
+        vgSetParameteri(paint, VG_PAINT_PATTERN_TILING_MODE, VG_TILE_REPEAT);
+        vgPaintPattern(paint, vgImg);
+        if (deref)
+            vgDestroyImage(vgImg); // Will be valid until pattern is destroyed.
+        return VG_PAINT_TYPE_PATTERN;
+    }
+
+    case Qt::ConicalGradientPattern: {
+        // Convert conical gradients into the first stop color.
+        qWarning() << "QVGPaintEnginePrivate::setBrush: conical gradients are not supported by OpenVG";
+        Q_ASSERT(brush.gradient()->type() == QGradient::ConicalGradient);
+        const QConicalGradient *grad =
+            static_cast<const QConicalGradient*>(brush.gradient());
+        const QGradientStops stops = grad->stops();
+        QColor color;
+        if (stops.size() > 0)
+            color = stops[0].second;
+        values[0] = color.redF();
+        values[1] = color.greenF();
+        values[2] = color.blueF();
+        values[3] = color.alphaF() * opacity;
+        if (prevType != VG_PAINT_TYPE_COLOR)
+            vgSetParameteri(paint, VG_PAINT_TYPE, VG_PAINT_TYPE_COLOR);
+        vgSetParameterfv(paint, VG_PAINT_COLOR, 4, values);
+        return VG_PAINT_TYPE_COLOR;
+    }
+
+    case Qt::Dense1Pattern:
+    case Qt::Dense2Pattern:
+    case Qt::Dense3Pattern:
+    case Qt::Dense4Pattern:
+    case Qt::Dense5Pattern:
+    case Qt::Dense6Pattern:
+    case Qt::Dense7Pattern:
+    case Qt::HorPattern:
+    case Qt::VerPattern:
+    case Qt::CrossPattern:
+    case Qt::BDiagPattern:
+    case Qt::FDiagPattern:
+    case Qt::DiagCrossPattern: {
+        // The brush is a traditional dotted or cross-hatched pattern brush.
+        QColor color = brush.color();
+        if (opacity != 1.0)
+            color.setAlphaF(color.alphaF() * opacity);
+        QImage image = colorizeBitmap
+            (qt_imageForBrush(brush.style(), true), color);
+        VGImage vgImg = toVGImage(image);
+        if (prevType != VG_PAINT_TYPE_PATTERN)
+            vgSetParameteri(paint, VG_PAINT_TYPE, VG_PAINT_TYPE_PATTERN);
+        vgSetParameteri(paint, VG_PAINT_PATTERN_TILING_MODE, VG_TILE_REPEAT);
+        vgPaintPattern(paint, vgImg);
+        vgDestroyImage(vgImg); // Will stay valid until pattern is destroyed.
+        return VG_PAINT_TYPE_PATTERN;
+    }
+
+    default: break;
+    }
+    return (VGPaintType)0;
+}
+
+void QVGPaintEnginePrivate::setPenParams(const QPen& pen)
+{
+    // Note: OpenVG does not support zero-width or cosmetic pens,
+    // so we have to simulate cosmetic pens by reversing the scale.
+    VGfloat width = pen.widthF();
+    if (width <= 0.0f)
+        width = 1.0f;
+    if (pen.isCosmetic()) {
+        if (penScale != 1.0 && penScale != 0.0)
+            width /= penScale;
+    }
+    vgSetf(VG_STROKE_LINE_WIDTH, width);
+
+    if (pen.capStyle() == Qt::FlatCap)
+        vgSetf(VG_STROKE_CAP_STYLE, VG_CAP_BUTT);
+    else if (pen.capStyle() == Qt::SquareCap)
+        vgSetf(VG_STROKE_CAP_STYLE, VG_CAP_SQUARE);
+    else
+        vgSetf(VG_STROKE_CAP_STYLE, VG_CAP_ROUND);
+
+    if (pen.joinStyle() == Qt::MiterJoin) {
+        vgSetf(VG_STROKE_JOIN_STYLE, VG_JOIN_MITER);
+        vgSetf(VG_STROKE_MITER_LIMIT, pen.miterLimit());
+    } else if (pen.joinStyle() == Qt::BevelJoin) {
+        vgSetf(VG_STROKE_JOIN_STYLE, VG_JOIN_BEVEL);
+    } else {
+        vgSetf(VG_STROKE_JOIN_STYLE, VG_JOIN_ROUND);
+    }
+
+    if (pen.style() == Qt::SolidLine) {
+        vgSetfv(VG_STROKE_DASH_PATTERN, 0, NULL);
+    } else {
+        const QVector<qreal> dashPattern = pen.dashPattern();
+        QVector<VGfloat> currentDashPattern(dashPattern.count());
+        for (int i = 0; i < dashPattern.count(); ++i)
+            currentDashPattern[i] = dashPattern[i] * width;
+        vgSetfv(VG_STROKE_DASH_PATTERN, currentDashPattern.count(), currentDashPattern.data());
+        vgSetf(VG_STROKE_DASH_PHASE, pen.dashOffset());
+        vgSetf(VG_STROKE_DASH_PHASE_RESET, VG_FALSE);
+    }
+}
+
+void QVGPaintEnginePrivate::setBrushTransform
+        (const QBrush& brush, VGMatrixMode mode)
+{
+    // Compute the new brush transformation matrix.
+    QTransform transform(brush.transform());
+    if (brushOrigin.x() != 0.0f || brushOrigin.y() != 0.0f)
+        transform.translate(brushOrigin.x(), brushOrigin.y());
+
+    // Bail out if the matrix is the same as last time, to avoid
+    // updating the VG context state unless absolutely necessary.
+    // Most applications won't have a brush transformation set,
+    // which will leave the VG setting at its default of identity.
+    // Always change the transform if coming out of raw VG mode.
+    if (mode == VG_MATRIX_FILL_PAINT_TO_USER) {
+        if (!rawVG && transform == brushTransform)
+            return;
+        brushTransform = transform;
+    } else {
+        if (!rawVG && transform == penTransform)
+            return;
+        penTransform = transform;
+    }
+
+    // Set the brush transformation matrix.
+    if (mode != matrixMode) {
+        vgSeti(VG_MATRIX_MODE, mode);
+        matrixMode = mode;
+    }
+    if (transform.isIdentity()) {
+        vgLoadIdentity();
+    } else {
+        VGfloat mat[9];
+        mat[0] = transform.m11();
+        mat[1] = transform.m12();
+        mat[2] = transform.m13();
+        mat[3] = transform.m21();
+        mat[4] = transform.m22();
+        mat[5] = transform.m23();
+        mat[6] = transform.m31();
+        mat[7] = transform.m32();
+        mat[8] = transform.m33();
+        vgLoadMatrix(mat);
+    }
+}
+
+void QVGPaintEnginePrivate::setupColorRamp(const QGradient *grad, VGPaint paint)
+{
+    QGradient::Spread spread = grad->spread();
+    VGColorRampSpreadMode spreadMode;
+    if (spread == QGradient::ReflectSpread)
+        spreadMode = VG_COLOR_RAMP_SPREAD_REFLECT;
+    else if (spread == QGradient::RepeatSpread)
+        spreadMode = VG_COLOR_RAMP_SPREAD_REPEAT;
+    else
+        spreadMode = VG_COLOR_RAMP_SPREAD_PAD;
+
+    const QGradientStops stops = grad->stops();
+    int n = 5*stops.size();
+    QVector<VGfloat> fill_stops(n);
+
+    for (int i = 0; i < stops.size(); ++i ) {
+        QColor col = stops[i].second;
+        fill_stops[i*5] = stops[i].first;
+        fill_stops[i*5 + 1] = col.redF();
+        fill_stops[i*5 + 2] = col.greenF();
+        fill_stops[i*5 + 3] = col.blueF();
+        fill_stops[i*5 + 4] = col.alphaF() * opacity;
+    }
+
+    vgSetParameteri(paint, VG_PAINT_COLOR_RAMP_SPREAD_MODE, spreadMode);
+    vgSetParameteri(paint, VG_PAINT_COLOR_RAMP_PREMULTIPLIED, VG_FALSE);
+    vgSetParameterfv(paint, VG_PAINT_COLOR_RAMP_STOPS, n, fill_stops.data());
+}
+
+QVGPainterState::QVGPainterState(QVGPainterState& other)
+    : QPainterState(other),
+      isNew(true), clipRegion(other.clipRegion),
+      savedDirty(0)
+{
+}
+
+QVGPainterState::QVGPainterState()
+    : isNew(true), savedDirty(0)
+{
+}
+
+QVGPainterState::~QVGPainterState()
+{
+}
+
+QVGPaintEngine::QVGPaintEngine()
+    : QPaintEngineEx(*new QVGPaintEnginePrivate)
+{
+}
+
+QVGPaintEngine::QVGPaintEngine(QVGPaintEnginePrivate &data)
+    : QPaintEngineEx(data)
+{
+}
+
+QVGPaintEngine::~QVGPaintEngine()
+{
+}
+
+QPainterState *QVGPaintEngine::createState(QPainterState *orig) const
+{
+    if (!orig) {
+        return new QVGPainterState();
+    } else {
+        Q_D(const QVGPaintEngine);
+        QVGPaintEnginePrivate *d2 = const_cast<QVGPaintEnginePrivate*>(d);
+        QVGPainterState *origState = static_cast<QVGPainterState *>(orig);
+        origState->savedDirty = d2->dirty;
+        d2->dirty = 0;
+        return new QVGPainterState(*origState);
+    }
+}
+
+void QVGPaintEnginePrivate::draw
+    (VGPath path, const QPen& pen, const QBrush& brush, VGint rule)
+{
+    VGbitfield mode = 0;
+    if (pen.style() != Qt::NoPen) {
+        ensurePen(pen);
+        mode |= VG_STROKE_PATH;
+    }
+    if (brush.style() != Qt::NoBrush) {
+        ensureBrush(brush);
+        setFillRule(rule);
+        mode |= VG_FILL_PATH;
+    }
+    if (mode != 0) {
+        ensurePathTransform();
+        vgDrawPath(path, mode);
+    }
+}
+
+void QVGPaintEnginePrivate::stroke(VGPath path, const QPen& pen)
+{
+    if (pen.style() == Qt::NoPen)
+        return;
+    ensurePen(pen);
+    ensurePathTransform();
+    vgDrawPath(path, VG_STROKE_PATH);
+}
+
+void QVGPaintEnginePrivate::fill(VGPath path, const QBrush& brush, VGint rule)
+{
+    if (brush.style() == Qt::NoBrush)
+        return;
+    ensureBrush(brush);
+    setFillRule(rule);
+    ensurePathTransform();
+    vgDrawPath(path, VG_FILL_PATH);
+}
+
+bool QVGPaintEngine::begin(QPaintDevice *pdev)
+{
+    Q_UNUSED(pdev);
+    Q_D(QVGPaintEngine);
+
+    // Initialize the VG painting objects if we haven't done it yet.
+    if (!d->penPaint)
+        d->initObjects();
+
+    // The initial clip region is the entire device area.
+    QVGPainterState *s = state();
+    s->clipRegion = defaultClipRegion();
+
+    // Initialize the VG state for this paint operation.
+    restoreState(QPaintEngine::AllDirty);
+    d->dirty = 0;
+    d->rawVG = false;
+    return true;
+}
+
+bool QVGPaintEngine::end()
+{
+    return true;
+}
+
+void QVGPaintEngine::draw(const QVectorPath &path)
+{
+    Q_D(QVGPaintEngine);
+    QVGPainterState *s = state();
+    VGPath vgpath = d->vectorPathToVGPath(path);
+    if (!path.hasWindingFill())
+        d->draw(vgpath, s->pen, s->brush, VG_EVEN_ODD);
+    else
+        d->draw(vgpath, s->pen, s->brush, VG_NON_ZERO);
+    vgDestroyPath(vgpath);
+}
+
+void QVGPaintEngine::fill(const QVectorPath &path, const QBrush &brush)
+{
+    Q_D(QVGPaintEngine);
+    VGPath vgpath = d->vectorPathToVGPath(path);
+    if (!path.hasWindingFill())
+        d->fill(vgpath, brush, VG_EVEN_ODD);
+    else
+        d->fill(vgpath, brush, VG_NON_ZERO);
+    vgDestroyPath(vgpath);
+}
+
+void QVGPaintEngine::stroke(const QVectorPath &path, const QPen &pen)
+{
+    Q_D(QVGPaintEngine);
+    VGPath vgpath = d->vectorPathToVGPath(path);
+    d->stroke(vgpath, pen);
+    vgDestroyPath(vgpath);
+}
+
+// Determine if a co-ordinate transform is simple enough to allow
+// rectangle-based clipping with vgMask().  Simple transforms most
+// often result from origin translations.
+static inline bool clipTransformIsSimple(const QTransform& transform)
+{
+    QTransform::TransformationType type = transform.type();
+    return (type == QTransform::TxNone || type == QTransform::TxTranslate);
+}
+
+#if defined(QVG_SCISSOR_CLIP)
+
+void QVGPaintEngine::clip(const QVectorPath &path, Qt::ClipOperation op)
+{
+    Q_D(QVGPaintEngine);
+    QVGPainterState *s = state();
+
+    d->dirty |= QPaintEngine::DirtyClipRegion;
+
+    if (op == Qt::NoClip) {
+        s->clipRegion = defaultClipRegion();
+        updateScissor();
+        return;
+    }
+
+    // We aren't using masking, so handle simple QRectF's only.
+    if (path.shape() == QVectorPath::RectangleHint &&
+            path.elementCount() == 4 && clipTransformIsSimple(d->transform)) {
+        // Clipping region that resulted from QPainter::setClipRect(QRectF).
+        // Convert it into a QRect and apply.
+        const qreal *points = path.points();
+        QRectF rect(points[0], points[1], points[2] - points[0],
+                    points[5] - points[1]);
+        clip(rect.toRect(), op);
+    } else {
+        // The best we can do is clip to the bounding rectangle
+        // of all control points.
+        clip(path.controlPointRect().toRect(), op);
+    }
+}
+
+void QVGPaintEngine::clip(const QRect &rect, Qt::ClipOperation op)
+{
+    Q_D(QVGPaintEngine);
+    QVGPainterState *s = state();
+
+    d->dirty |= QPaintEngine::DirtyClipRegion;
+
+    // If we have a non-simple transform, then use path-based clipping.
+    if (op != Qt::NoClip && !clipTransformIsSimple(d->transform)) {
+        QPaintEngineEx::clip(rect, op);
+        return;
+    }
+
+    switch (op) {
+        case Qt::NoClip:
+        {
+            s->clipRegion = defaultClipRegion();
+        }
+        break;
+
+        case Qt::ReplaceClip:
+        {
+            s->clipRegion = d->transform.map(QRegion(rect));
+        }
+        break;
+
+        case Qt::IntersectClip:
+        {
+            s->clipRegion = s->clipRegion.intersect(d->transform.map(QRegion(rect)));
+        }
+        break;
+
+        case Qt::UniteClip:
+        {
+            s->clipRegion = s->clipRegion.unite(d->transform.map(QRegion(rect)));
+        }
+        break;
+    }
+
+    updateScissor();
+}
+
+void QVGPaintEngine::clip(const QRegion &region, Qt::ClipOperation op)
+{
+    Q_D(QVGPaintEngine);
+    QVGPainterState *s = state();
+
+    d->dirty |= QPaintEngine::DirtyClipRegion;
+
+    // If we have a non-simple transform, then use path-based clipping.
+    if (op != Qt::NoClip && !clipTransformIsSimple(d->transform)) {
+        QPaintEngineEx::clip(region, op);
+        return;
+    }
+
+    switch (op) {
+        case Qt::NoClip:
+        {
+            s->clipRegion = defaultClipRegion();
+        }
+        break;
+
+        case Qt::ReplaceClip:
+        {
+            s->clipRegion = d->transform.map(region);
+        }
+        break;
+
+        case Qt::IntersectClip:
+        {
+            s->clipRegion = s->clipRegion.intersect(d->transform.map(region));
+        }
+        break;
+
+        case Qt::UniteClip:
+        {
+            s->clipRegion = s->clipRegion.unite(d->transform.map(region));
+        }
+        break;
+    }
+
+    updateScissor();
+}
+
+void QVGPaintEngine::clip(const QPainterPath &path, Qt::ClipOperation op)
+{
+    QPaintEngineEx::clip(path, op);
+}
+
+#else // !QVG_SCISSOR_CLIP
+
+void QVGPaintEngine::clip(const QVectorPath &path, Qt::ClipOperation op)
+{
+    Q_D(QVGPaintEngine);
+
+    d->dirty |= QPaintEngine::DirtyClipRegion;
+
+    if (op == Qt::NoClip) {
+        d->maskValid = false;
+        d->maskIsSet = true;
+        d->maskRect = QRect();
+        vgSeti(VG_MASKING, VG_FALSE);
+        return;
+    }
+
+#if defined(QVG_NO_RENDER_TO_MASK)
+    // We don't have vgRenderToMask(), so handle simple QRectF's only.
+    if (path.shape() == QVectorPath::RectangleHint &&
+            path.elementCount() == 4 && clipTransformIsSimple(d->transform)) {
+        // Clipping region that resulted from QPainter::setClipRect(QRectF).
+        // Convert it into a QRect and apply.
+        const qreal *points = path.points();
+        QRectF rect(points[0], points[1], points[2] - points[0],
+                    points[5] - points[1]);
+        clip(rect.toRect(), op);
+    }
+#else
+    QPaintDevice *pdev = paintDevice();
+    int width = pdev->width();
+    int height = pdev->height();
+
+    if (op == Qt::ReplaceClip) {
+        vgMask(VG_INVALID_HANDLE, VG_CLEAR_MASK, 0, 0, width, height);
+        d->maskRect = QRect();
+    } else if (!d->maskValid) {
+        d->ensureMask(this, width, height);
+    }
+
+    d->ensurePathTransform();
+    VGPath vgpath = d->vectorPathToVGPath(path);
+    switch (op) {
+        case Qt::ReplaceClip:
+        case Qt::UniteClip:
+            vgRenderToMask(vgpath, VG_FILL_PATH, VG_UNION_MASK);
+            break;
+
+        case Qt::IntersectClip:
+            vgRenderToMask(vgpath, VG_FILL_PATH, VG_INTERSECT_MASK);
+            break;
+
+        default: break;
+    }
+    vgDestroyPath(vgpath);
+
+    vgSeti(VG_MASKING, VG_TRUE);
+    d->maskValid = true;
+    d->maskIsSet = false;
+#endif
+}
+
+void QVGPaintEngine::clip(const QRect &rect, Qt::ClipOperation op)
+{
+    Q_D(QVGPaintEngine);
+
+    d->dirty |= QPaintEngine::DirtyClipRegion;
+
+    // If we have a non-simple transform, then use path-based clipping.
+    if (op != Qt::NoClip && !clipTransformIsSimple(d->transform)) {
+        QPaintEngineEx::clip(rect, op);
+        return;
+    }
+
+    switch (op) {
+        case Qt::NoClip:
+        {
+            d->maskValid = false;
+            d->maskIsSet = true;
+            d->maskRect = QRect();
+            vgSeti(VG_MASKING, VG_FALSE);
+        }
+        break;
+
+        case Qt::ReplaceClip:
+        {
+            QRect r = d->transform.mapRect(rect);
+            if (isDefaultClipRect(r)) {
+                // Replacing the clip with a full-window region is the
+                // same as turning off clipping.
+                if (d->maskValid)
+                    vgSeti(VG_MASKING, VG_FALSE);
+                d->maskValid = false;
+                d->maskIsSet = true;
+                d->maskRect = QRect();
+            } else {
+                // Special case: if the intersection of the system
+                // clip and "r" is a single rectangle, then use the
+                // scissor for clipping.  We try to avoid allocating a
+                // QRegion copy on the heap for the test if we can.
+                QRegion clip = d->systemClip; // Reference-counted, no alloc.
+                QRect clipRect;
+                if (clip.numRects() == 1) {
+                    clipRect = clip.boundingRect().intersected(r);
+                } else if (clip.isEmpty()) {
+                    clipRect = r;
+                } else {
+                    clip = clip.intersect(r);
+                    if (clip.numRects() != 1) {
+                        d->maskValid = false;
+                        d->maskIsSet = false;
+                        d->maskRect = QRect();
+                        d->modifyMask(this, VG_FILL_MASK, r);
+                        break;
+                    }
+                    clipRect = clip.boundingRect();
+                }
+                d->maskValid = false;
+                d->maskIsSet = false;
+                d->maskRect = clipRect;
+                vgSeti(VG_MASKING, VG_FALSE);
+                updateScissor();
+            }
+        }
+        break;
+
+        case Qt::IntersectClip:
+        {
+            QRect r = d->transform.mapRect(rect);
+            if (d->maskIsSet && isDefaultClipRect(r)) {
+                // Intersecting a full-window clip with a full-window
+                // region is the same as turning off clipping.
+                if (d->maskValid)
+                    vgSeti(VG_MASKING, VG_FALSE);
+                d->maskValid = false;
+                d->maskIsSet = true;
+                d->maskRect = QRect();
+            } else {
+                d->modifyMask(this, VG_INTERSECT_MASK, r);
+            }
+        }
+        break;
+
+        case Qt::UniteClip:
+        {
+            // If we already have a full-window clip, then uniting a
+            // region with it will do nothing.  Otherwise union.
+            if (!(d->maskIsSet))
+                d->modifyMask(this, VG_UNION_MASK, d->transform.mapRect(rect));
+        }
+        break;
+    }
+}
+
+void QVGPaintEngine::clip(const QRegion &region, Qt::ClipOperation op)
+{
+    Q_D(QVGPaintEngine);
+
+    // Use the QRect case if the region consists of a single rectangle.
+    if (region.numRects() == 1) {
+        clip(region.boundingRect(), op);
+        return;
+    }
+
+    d->dirty |= QPaintEngine::DirtyClipRegion;
+
+    // If we have a non-simple transform, then use path-based clipping.
+    if (op != Qt::NoClip && !clipTransformIsSimple(d->transform)) {
+        QPaintEngineEx::clip(region, op);
+        return;
+    }
+
+    switch (op) {
+        case Qt::NoClip:
+        {
+            d->maskValid = false;
+            d->maskIsSet = true;
+            d->maskRect = QRect();
+            vgSeti(VG_MASKING, VG_FALSE);
+        }
+        break;
+
+        case Qt::ReplaceClip:
+        {
+            QRegion r = d->transform.map(region);
+            if (isDefaultClipRegion(r)) {
+                // Replacing the clip with a full-window region is the
+                // same as turning off clipping.
+                if (d->maskValid)
+                    vgSeti(VG_MASKING, VG_FALSE);
+                d->maskValid = false;
+                d->maskIsSet = true;
+                d->maskRect = QRect();
+            } else {
+                // Special case: if the intersection of the system
+                // clip and the region is a single rectangle, then
+                // use the scissor for clipping.
+                QRegion clip = d->systemClip;
+                if (clip.isEmpty())
+                    clip = r;
+                else
+                    clip = clip.intersect(r);
+                if (clip.numRects() == 1) {
+                    d->maskValid = false;
+                    d->maskIsSet = false;
+                    d->maskRect = clip.boundingRect();
+                    vgSeti(VG_MASKING, VG_FALSE);
+                    updateScissor();
+                } else {
+                    d->maskValid = false;
+                    d->maskIsSet = false;
+                    d->maskRect = QRect();
+                    d->modifyMask(this, VG_FILL_MASK, r);
+                }
+            }
+        }
+        break;
+
+        case Qt::IntersectClip:
+        {
+            if (region.numRects() != 1) {
+                // If there is more than one rectangle, then intersecting
+                // the rectangles one by one in modifyMask() will not give
+                // the desired result.  So fall back to path-based clipping.
+                QPaintEngineEx::clip(region, op);
+                return;
+            }
+            QRegion r = d->transform.map(region);
+            if (d->maskIsSet && isDefaultClipRegion(r)) {
+                // Intersecting a full-window clip with a full-window
+                // region is the same as turning off clipping.
+                if (d->maskValid)
+                    vgSeti(VG_MASKING, VG_FALSE);
+                d->maskValid = false;
+                d->maskIsSet = true;
+                d->maskRect = QRect();
+            } else {
+                d->modifyMask(this, VG_INTERSECT_MASK, r);
+            }
+        }
+        break;
+
+        case Qt::UniteClip:
+        {
+            // If we already have a full-window clip, then uniting a
+            // region with it will do nothing.  Otherwise union.
+            if (!(d->maskIsSet))
+                d->modifyMask(this, VG_UNION_MASK, d->transform.map(region));
+        }
+        break;
+    }
+}
+
+#if !defined(QVG_NO_RENDER_TO_MASK)
+
+// Copied from qpathclipper.cpp.
+static bool qt_vg_pathToRect(const QPainterPath &path, QRectF *rect)
+{
+    if (path.elementCount() != 5)
+        return false;
+
+    const bool mightBeRect = path.elementAt(0).isMoveTo()
+        && path.elementAt(1).isLineTo()
+        && path.elementAt(2).isLineTo()
+        && path.elementAt(3).isLineTo()
+        && path.elementAt(4).isLineTo();
+
+    if (!mightBeRect)
+        return false;
+
+    const qreal x1 = path.elementAt(0).x;
+    const qreal y1 = path.elementAt(0).y;
+
+    const qreal x2 = path.elementAt(1).x;
+    const qreal y2 = path.elementAt(2).y;
+
+    if (path.elementAt(1).y != y1)
+        return false;
+
+    if (path.elementAt(2).x != x2)
+        return false;
+
+    if (path.elementAt(3).x != x1 || path.elementAt(3).y != y2)
+        return false;
+
+    if (path.elementAt(4).x != x1 || path.elementAt(4).y != y1)
+        return false;
+
+    if (rect)
+        *rect = QRectF(QPointF(x1, y1), QPointF(x2, y2));
+
+    return true;
+}
+
+#endif
+
+void QVGPaintEngine::clip(const QPainterPath &path, Qt::ClipOperation op)
+{
+#if !defined(QVG_NO_RENDER_TO_MASK)
+    Q_D(QVGPaintEngine);
+
+    // If the path is a simple rectangle, then use clip(QRect) instead.
+    QRectF simpleRect;
+    if (qt_vg_pathToRect(path, &simpleRect)) {
+        clip(simpleRect.toRect(), op);
+        return;
+    }
+
+    d->dirty |= QPaintEngine::DirtyClipRegion;
+
+    if (op == Qt::NoClip) {
+        d->maskValid = false;
+        d->maskIsSet = true;
+        d->maskRect = QRect();
+        vgSeti(VG_MASKING, VG_FALSE);
+        return;
+    }
+
+    QPaintDevice *pdev = paintDevice();
+    int width = pdev->width();
+    int height = pdev->height();
+
+    if (op == Qt::ReplaceClip) {
+        vgMask(VG_INVALID_HANDLE, VG_CLEAR_MASK, 0, 0, width, height);
+        d->maskRect = QRect();
+    } else if (!d->maskValid) {
+        d->ensureMask(this, width, height);
+    }
+
+    d->ensurePathTransform();
+    VGPath vgpath = d->painterPathToVGPath(path);
+    switch (op) {
+        case Qt::ReplaceClip:
+        case Qt::UniteClip:
+            vgRenderToMask(vgpath, VG_FILL_PATH, VG_UNION_MASK);
+            break;
+
+        case Qt::IntersectClip:
+            vgRenderToMask(vgpath, VG_FILL_PATH, VG_INTERSECT_MASK);
+            break;
+
+        default: break;
+    }
+    vgDestroyPath(vgpath);
+
+    vgSeti(VG_MASKING, VG_TRUE);
+    d->maskValid = true;
+    d->maskIsSet = false;
+#else
+    QPaintEngineEx::clip(path, op);
+#endif
+}
+
+void QVGPaintEnginePrivate::ensureMask
+        (QVGPaintEngine *engine, int width, int height)
+{
+    if (maskIsSet) {
+        vgMask(VG_INVALID_HANDLE, VG_FILL_MASK, 0, 0, width, height);
+        maskRect = QRect();
+    } else {
+        vgMask(VG_INVALID_HANDLE, VG_CLEAR_MASK, 0, 0, width, height);
+        if (maskRect.isValid()) {
+            vgMask(VG_INVALID_HANDLE, VG_FILL_MASK,
+                   maskRect.x(), height - maskRect.y() - maskRect.height(),
+                   maskRect.width(), maskRect.height());
+            maskRect = QRect();
+            engine->updateScissor();
+        }
+    }
+}
+
+void QVGPaintEnginePrivate::modifyMask
+        (QVGPaintEngine *engine, VGMaskOperation op, const QRegion& region)
+{
+    QPaintDevice *pdev = engine->paintDevice();
+    int width = pdev->width();
+    int height = pdev->height();
+
+    if (!maskValid)
+        ensureMask(engine, width, height);
+
+    QVector<QRect> rects = region.rects();
+    for (int i = 0; i < rects.size(); ++i) {
+        vgMask(VG_INVALID_HANDLE, op,
+               rects[i].x(), height - rects[i].y() - rects[i].height(),
+               rects[i].width(), rects[i].height());
+    }
+
+    vgSeti(VG_MASKING, VG_TRUE);
+    maskValid = true;
+    maskIsSet = false;
+}
+
+void QVGPaintEnginePrivate::modifyMask
+        (QVGPaintEngine *engine, VGMaskOperation op, const QRect& rect)
+{
+    QPaintDevice *pdev = engine->paintDevice();
+    int width = pdev->width();
+    int height = pdev->height();
+
+    if (!maskValid)
+        ensureMask(engine, width, height);
+
+    if (rect.isValid()) {
+        vgMask(VG_INVALID_HANDLE, op,
+               rect.x(), height - rect.y() - rect.height(),
+               rect.width(), rect.height());
+    }
+
+    vgSeti(VG_MASKING, VG_TRUE);
+    maskValid = true;
+    maskIsSet = false;
+}
+
+#endif // !QVG_SCISSOR_CLIP
+
+void QVGPaintEngine::updateScissor()
+{
+    Q_D(QVGPaintEngine);
+
+    QRegion region = d->systemClip;
+
+#if defined(QVG_SCISSOR_CLIP)
+    // Using the scissor to do clipping, so combine the systemClip
+    // with the current painting clipRegion.
+    QVGPainterState *s = state();
+    if (s->clipEnabled) {
+        if (region.isEmpty())
+            region = s->clipRegion;
+        else
+            region = region.intersect(s->clipRegion);
+        if (isDefaultClipRegion(region)) {
+            // The scissor region is the entire drawing surface,
+            // so there is no point doing any scissoring.
+            vgSeti(VG_SCISSORING, VG_FALSE);
+            d->scissorActive = false;
+            return;
+        }
+    } else
+#endif
+    {
+#if !defined(QVG_SCISSOR_CLIP)
+        // Combine the system clip with the simple mask rectangle.
+        if (!d->maskRect.isNull()) {
+            if (region.isEmpty())
+                region = d->maskRect;
+            else
+                region = region.intersect(d->maskRect);
+            if (isDefaultClipRegion(region)) {
+                // The scissor region is the entire drawing surface,
+                // so there is no point doing any scissoring.
+                vgSeti(VG_SCISSORING, VG_FALSE);
+                d->scissorActive = false;
+                return;
+            }
+        } else
+#endif
+
+        // Disable the scissor completely if the system clip is empty.
+        if (region.isEmpty()) {
+            vgSeti(VG_SCISSORING, VG_FALSE);
+            d->scissorActive = false;
+            return;
+        }
+    }
+
+    if (d->scissorActive && region == d->scissorRegion)
+        return;
+
+    QVector<QRect> rects = region.rects();
+    int count = rects.count();
+    if (count > d->maxScissorRects)
+        count = d->maxScissorRects;
+    QVarLengthArray<VGint> params(count * 4);
+    int height = paintDevice()->height();
+    for (int i = 0; i < count; ++i) {
+        params[i * 4 + 0] = rects[i].x();
+        params[i * 4 + 1] = height - rects[i].y() - rects[i].height();
+        params[i * 4 + 2] = rects[i].width();
+        params[i * 4 + 3] = rects[i].height();
+    }
+
+    vgSetiv(VG_SCISSOR_RECTS, count * 4, params.data());
+    vgSeti(VG_SCISSORING, VG_TRUE);
+    d->scissorActive = true;
+    d->scissorRegion = region;
+}
+
+QRegion QVGPaintEngine::defaultClipRegion()
+{
+    // The default clip region for a paint device is the whole drawing area.
+    QPaintDevice *pdev = paintDevice();
+    return QRegion(0, 0, pdev->width(), pdev->height());
+}
+
+bool QVGPaintEngine::isDefaultClipRegion(const QRegion& region)
+{
+    if (region.numRects() != 1)
+        return false;
+
+    QPaintDevice *pdev = paintDevice();
+    int width = pdev->width();
+    int height = pdev->height();
+
+    QRect rect = region.boundingRect();
+    return (rect.x() == 0 && rect.y() == 0 &&
+            rect.width() == width && rect.height() == height);
+}
+
+bool QVGPaintEngine::isDefaultClipRect(const QRect& rect)
+{
+    QPaintDevice *pdev = paintDevice();
+    int width = pdev->width();
+    int height = pdev->height();
+
+    return (rect.x() == 0 && rect.y() == 0 &&
+            rect.width() == width && rect.height() == height);
+}
+
+void QVGPaintEngine::clipEnabledChanged()
+{
+#if defined(QVG_SCISSOR_CLIP)
+    updateScissor();
+#else
+    Q_D(QVGPaintEngine);
+    QVGPainterState *s = state();
+    d->dirty |= QPaintEngine::DirtyClipEnabled;
+    if (s->clipEnabled && s->clipOperation != Qt::NoClip) {
+        // Replay the entire clip stack to put the mask into the right state.
+        d->maskValid = false;
+        d->maskIsSet = true;
+        d->maskRect = QRect();
+        s->clipRegion = defaultClipRegion();
+        d->replayClipOperations();
+        d->transform = s->transform();
+        d->updateTransform(paintDevice());
+    } else {
+        vgSeti(VG_MASKING, VG_FALSE);
+        d->maskValid = false;
+        d->maskIsSet = false;
+        d->maskRect = QRect();
+    }
+#endif
+}
+
+void QVGPaintEngine::penChanged()
+{
+    Q_D(QVGPaintEngine);
+    d->dirty |= QPaintEngine::DirtyPen;
+}
+
+void QVGPaintEngine::brushChanged()
+{
+    Q_D(QVGPaintEngine);
+    d->dirty |= QPaintEngine::DirtyBrush;
+}
+
+void QVGPaintEngine::brushOriginChanged()
+{
+    Q_D(QVGPaintEngine);
+    d->dirty |= QPaintEngine::DirtyBrushOrigin;
+    d->brushOrigin = state()->brushOrigin;
+    d->forcePenChange = true;
+    d->forceBrushChange = true;
+}
+
+void QVGPaintEngine::opacityChanged()
+{
+    Q_D(QVGPaintEngine);
+    d->dirty |= QPaintEngine::DirtyOpacity;
+    d->opacity = state()->opacity;
+    d->forcePenChange = true;
+    d->forceBrushChange = true;
+}
+
+void QVGPaintEngine::compositionModeChanged()
+{
+    Q_D(QVGPaintEngine);
+    d->dirty |= QPaintEngine::DirtyCompositionMode;
+
+    VGBlendMode vgMode = VG_BLEND_SRC_OVER;
+
+    switch (state()->composition_mode) {
+    case QPainter::CompositionMode_SourceOver:
+        vgMode = VG_BLEND_SRC_OVER;
+        break;
+    case QPainter::CompositionMode_DestinationOver:
+        vgMode = VG_BLEND_DST_OVER;
+        break;
+    case QPainter::CompositionMode_Source:
+        vgMode = VG_BLEND_SRC;
+        break;
+    case QPainter::CompositionMode_SourceIn:
+        vgMode = VG_BLEND_SRC_IN;
+        break;
+    case QPainter::CompositionMode_DestinationIn:
+        vgMode = VG_BLEND_DST_IN;
+        break;
+    case QPainter::CompositionMode_Plus:
+        vgMode = VG_BLEND_ADDITIVE;
+        break;
+    case QPainter::CompositionMode_Multiply:
+        vgMode = VG_BLEND_MULTIPLY;
+        break;
+    case QPainter::CompositionMode_Screen:
+        vgMode = VG_BLEND_SCREEN;
+        break;
+    case QPainter::CompositionMode_Darken:
+        vgMode = VG_BLEND_DARKEN;
+        break;
+    case QPainter::CompositionMode_Lighten:
+        vgMode = VG_BLEND_LIGHTEN;
+        break;
+    default:
+        qWarning() << "QVGPaintEngine::compositionModeChanged unsupported mode" << state()->composition_mode;
+        break;  // Fall back to VG_BLEND_SRC_OVER.
+    }
+
+    d->setBlendMode(vgMode);
+}
+
+void QVGPaintEngine::renderHintsChanged()
+{
+    Q_D(QVGPaintEngine);
+    d->dirty |= QPaintEngine::DirtyHints;
+
+    QPainter::RenderHints hints = state()->renderHints;
+
+    VGRenderingQuality rq =
+            (hints & QPainter::Antialiasing)
+                ? VG_RENDERING_QUALITY_BETTER
+                : VG_RENDERING_QUALITY_NONANTIALIASED;
+    VGImageQuality iq =
+            (hints & QPainter::SmoothPixmapTransform)
+                ? VG_IMAGE_QUALITY_BETTER
+                : VG_IMAGE_QUALITY_NONANTIALIASED;
+
+    d->setRenderingQuality(rq);
+    d->setImageQuality(iq);
+}
+
+void QVGPaintEngine::transformChanged()
+{
+    Q_D(QVGPaintEngine);
+    QVGPainterState *s = state();
+    d->dirty |= QPaintEngine::DirtyTransform;
+    d->transform = s->transform();
+    qreal oldPenScale = d->penScale;
+    d->updateTransform(paintDevice());
+    if (d->penScale != oldPenScale)
+        d->forcePenChange = true;
+}
+
+bool QVGPaintEngine::clearRect(const QRectF &rect, const QColor &color)
+{
+    Q_D(QVGPaintEngine);
+    QVGPainterState *s = state();
+    if (!s->clipEnabled || s->clipOperation == Qt::NoClip) {
+        // The transform will either be identity or a simple translation,
+        // so do a simpler version of "r = d->transform.map(rect).toRect()".
+        QRect r = QRect(qRound(rect.x() + d->transform.dx()),
+                        qRound(rect.y() + d->transform.dy()),
+                        qRound(rect.width()),
+                        qRound(rect.height()));
+        int height = paintDevice()->height();
+        if (d->clearColor != color || d->clearOpacity != s->opacity) {
+            VGfloat values[4];
+            values[0] = color.redF();
+            values[1] = color.greenF();
+            values[2] = color.blueF();
+            values[3] = color.alphaF() * s->opacity;
+            vgSetfv(VG_CLEAR_COLOR, 4, values);
+            d->clearColor = color;
+            d->clearOpacity = s->opacity;
+        }
+        vgClear(r.x(), height - r.y() - r.height(),
+                r.width(), r.height());
+        return true;
+    }
+    return false;
+}
+
+void QVGPaintEngine::fillRect(const QRectF &rect, const QBrush &brush)
+{
+    Q_D(QVGPaintEngine);
+
+    if (brush.style() == Qt::NoBrush)
+        return;
+
+    // Check to see if we can use vgClear() for faster filling.
+    if (brush.style() == Qt::SolidPattern &&
+            clipTransformIsSimple(d->transform) && d->opacity == 1.0f &&
+            clearRect(rect, brush.color())) {
+        return;
+    }
+
+#if !defined(QVG_NO_MODIFY_PATH)
+    VGfloat coords[8];
+    if (d->simpleTransform) {
+        coords[0] = rect.x();
+        coords[1] = rect.y();
+        coords[2] = rect.x() + rect.width();
+        coords[3] = coords[1];
+        coords[4] = coords[2];
+        coords[5] = rect.y() + rect.height();
+        coords[6] = coords[0];
+        coords[7] = coords[5];
+    } else {
+        QPointF tl = d->transform.map(rect.topLeft());
+        QPointF tr = d->transform.map(rect.topRight());
+        QPointF bl = d->transform.map(rect.bottomLeft());
+        QPointF br = d->transform.map(rect.bottomRight());
+        coords[0] = tl.x();
+        coords[1] = tl.y();
+        coords[2] = tr.x();
+        coords[3] = tr.y();
+        coords[4] = br.x();
+        coords[5] = br.y();
+        coords[6] = bl.x();
+        coords[7] = bl.y();
+    }
+    vgModifyPathCoords(d->rectPath, 0, 4, coords);
+    d->fill(d->rectPath, brush);
+#else
+    QPaintEngineEx::fillRect(rect, brush);
+#endif
+}
+
+void QVGPaintEngine::fillRect(const QRectF &rect, const QColor &color)
+{
+    Q_D(QVGPaintEngine);
+
+    // Check to see if we can use vgClear() for faster filling.
+    if (clipTransformIsSimple(d->transform) && d->opacity == 1.0f &&
+            clearRect(rect, color)) {
+        return;
+    }
+
+#if !defined(QVG_NO_MODIFY_PATH)
+    VGfloat coords[8];
+    if (d->simpleTransform) {
+        coords[0] = rect.x();
+        coords[1] = rect.y();
+        coords[2] = rect.x() + rect.width();
+        coords[3] = coords[1];
+        coords[4] = coords[2];
+        coords[5] = rect.y() + rect.height();
+        coords[6] = coords[0];
+        coords[7] = coords[5];
+    } else {
+        QPointF tl = d->transform.map(rect.topLeft());
+        QPointF tr = d->transform.map(rect.topRight());
+        QPointF bl = d->transform.map(rect.bottomLeft());
+        QPointF br = d->transform.map(rect.bottomRight());
+        coords[0] = tl.x();
+        coords[1] = tl.y();
+        coords[2] = tr.x();
+        coords[3] = tr.y();
+        coords[4] = br.x();
+        coords[5] = br.y();
+        coords[6] = bl.x();
+        coords[7] = bl.y();
+    }
+    vgModifyPathCoords(d->rectPath, 0, 4, coords);
+    d->fill(d->rectPath, QBrush(color));
+#else
+    QPaintEngineEx::fillRect(rect, QBrush(color));
+#endif
+}
+
+void QVGPaintEngine::drawRoundedRect(const QRectF &rect, qreal xrad, qreal yrad, Qt::SizeMode mode)
+{
+    Q_D(QVGPaintEngine);
+    if (d->simpleTransform) {
+        QVGPainterState *s = state();
+        VGPath vgpath = d->roundedRectPath(rect, xrad, yrad, mode);
+        d->draw(vgpath, s->pen, s->brush);
+#if defined(QVG_NO_MODIFY_PATH)
+        vgDestroyPath(vgpath);
+#endif
+    } else {
+        QPaintEngineEx::drawRoundedRect(rect, xrad, yrad, mode);
+    }
+}
+
+void QVGPaintEngine::drawRects(const QRect *rects, int rectCount)
+{
+#if !defined(QVG_NO_MODIFY_PATH)
+    Q_D(QVGPaintEngine);
+    QVGPainterState *s = state();
+    for (int i = 0; i < rectCount; ++i, ++rects) {
+        VGfloat coords[8];
+        if (d->simpleTransform) {
+            coords[0] = rects->x();
+            coords[1] = rects->y();
+            coords[2] = rects->x() + rects->width();
+            coords[3] = coords[1];
+            coords[4] = coords[2];
+            coords[5] = rects->y() + rects->height();
+            coords[6] = coords[0];
+            coords[7] = coords[5];
+        } else {
+            QPointF tl = d->transform.map(QPointF(rects->x(), rects->y()));
+            QPointF tr = d->transform.map(QPointF(rects->x() + rects->width(),
+                                                  rects->y()));
+            QPointF bl = d->transform.map(QPointF(rects->x(),
+                                                  rects->y() + rects->height()));
+            QPointF br = d->transform.map(QPointF(rects->x() + rects->width(),
+                                                  rects->y() + rects->height()));
+            coords[0] = tl.x();
+            coords[1] = tl.y();
+            coords[2] = tr.x();
+            coords[3] = tr.y();
+            coords[4] = br.x();
+            coords[5] = br.y();
+            coords[6] = bl.x();
+            coords[7] = bl.y();
+        }
+        vgModifyPathCoords(d->rectPath, 0, 4, coords);
+        d->draw(d->rectPath, s->pen, s->brush);
+    }
+#else
+    QPaintEngineEx::drawRects(rects, rectCount);
+#endif
+}
+
+void QVGPaintEngine::drawRects(const QRectF *rects, int rectCount)
+{
+#if !defined(QVG_NO_MODIFY_PATH)
+    Q_D(QVGPaintEngine);
+    QVGPainterState *s = state();
+    for (int i = 0; i < rectCount; ++i, ++rects) {
+        VGfloat coords[8];
+        if (d->simpleTransform) {
+            coords[0] = rects->x();
+            coords[1] = rects->y();
+            coords[2] = rects->x() + rects->width();
+            coords[3] = coords[1];
+            coords[4] = coords[2];
+            coords[5] = rects->y() + rects->height();
+            coords[6] = coords[0];
+            coords[7] = coords[5];
+        } else {
+            QPointF tl = d->transform.map(rects->topLeft());
+            QPointF tr = d->transform.map(rects->topRight());
+            QPointF bl = d->transform.map(rects->bottomLeft());
+            QPointF br = d->transform.map(rects->bottomRight());
+            coords[0] = tl.x();
+            coords[1] = tl.y();
+            coords[2] = tr.x();
+            coords[3] = tr.y();
+            coords[4] = br.x();
+            coords[5] = br.y();
+            coords[6] = bl.x();
+            coords[7] = bl.y();
+        }
+        vgModifyPathCoords(d->rectPath, 0, 4, coords);
+        d->draw(d->rectPath, s->pen, s->brush);
+    }
+#else
+    QPaintEngineEx::drawRects(rects, rectCount);
+#endif
+}
+
+void QVGPaintEngine::drawLines(const QLine *lines, int lineCount)
+{
+#if !defined(QVG_NO_MODIFY_PATH)
+    Q_D(QVGPaintEngine);
+    QVGPainterState *s = state();
+    for (int i = 0; i < lineCount; ++i, ++lines) {
+        VGfloat coords[4];
+        if (d->simpleTransform) {
+            coords[0] = lines->x1();
+            coords[1] = lines->y1();
+            coords[2] = lines->x2();
+            coords[3] = lines->y2();
+        } else {
+            QPointF p1 = d->transform.map(QPointF(lines->x1(), lines->y1()));
+            QPointF p2 = d->transform.map(QPointF(lines->x2(), lines->y2()));
+            coords[0] = p1.x();
+            coords[1] = p1.y();
+            coords[2] = p2.x();
+            coords[3] = p2.y();
+        }
+        vgModifyPathCoords(d->linePath, 0, 2, coords);
+        d->stroke(d->linePath, s->pen);
+    }
+#else
+    QPaintEngineEx::drawLines(lines, lineCount);
+#endif
+}
+
+void QVGPaintEngine::drawLines(const QLineF *lines, int lineCount)
+{
+#if !defined(QVG_NO_MODIFY_PATH)
+    Q_D(QVGPaintEngine);
+    QVGPainterState *s = state();
+    for (int i = 0; i < lineCount; ++i, ++lines) {
+        VGfloat coords[4];
+        if (d->simpleTransform) {
+            coords[0] = lines->x1();
+            coords[1] = lines->y1();
+            coords[2] = lines->x2();
+            coords[3] = lines->y2();
+        } else {
+            QPointF p1 = d->transform.map(lines->p1());
+            QPointF p2 = d->transform.map(lines->p2());
+            coords[0] = p1.x();
+            coords[1] = p1.y();
+            coords[2] = p2.x();
+            coords[3] = p2.y();
+        }
+        vgModifyPathCoords(d->linePath, 0, 2, coords);
+        d->stroke(d->linePath, s->pen);
+    }
+#else
+    QPaintEngineEx::drawLines(lines, lineCount);
+#endif
+}
+
+void QVGPaintEngine::drawEllipse(const QRectF &r)
+{
+    // Based on the description of vguEllipse() in the OpenVG specification.
+    // We don't use vguEllipse(), to avoid unnecessary library dependencies.
+    Q_D(QVGPaintEngine);
+    if (d->simpleTransform) {
+        QVGPainterState *s = state();
+        VGPath path = vgCreatePath(VG_PATH_FORMAT_STANDARD,
+                                   VG_PATH_DATATYPE_F,
+                                   1.0f, // scale
+                                   0.0f, // bias
+                                   4,    // segmentCapacityHint
+                                   12,   // coordCapacityHint
+                                   VG_PATH_CAPABILITY_ALL);
+        static VGubyte segments[4] = {
+            VG_MOVE_TO_ABS,
+            VG_SCCWARC_TO_REL,
+            VG_SCCWARC_TO_REL,
+            VG_CLOSE_PATH
+        };
+        VGfloat coords[12];
+        VGfloat halfwid = r.width() / 2;
+        VGfloat halfht = r.height() / 2;
+        coords[0]  = r.x() + r.width();
+        coords[1]  = r.y() + halfht;
+        coords[2]  = halfwid;
+        coords[3]  = halfht;
+        coords[4]  = 0.0f;
+        coords[5]  = -r.width();
+        coords[6]  = 0.0f;
+        coords[7]  = halfwid;
+        coords[8]  = halfht;
+        coords[9]  = 0.0f;
+        coords[10] = r.width();
+        coords[11] = 0.0f;
+        vgAppendPathData(path, 4, segments, coords);
+        d->draw(path, s->pen, s->brush);
+        vgDestroyPath(path);
+    } else {
+        // The projective transform version of an ellipse is difficult.
+        // Generate a QVectorPath containing cubic curves and transform that.
+        QPaintEngineEx::drawEllipse(r);
+    }
+}
+
+void QVGPaintEngine::drawEllipse(const QRect &r)
+{
+    drawEllipse(QRectF(r));
+}
+
+void QVGPaintEngine::drawPath(const QPainterPath &path)
+{
+    // Shortcut past the QPainterPath -> QVectorPath conversion,
+    // converting the QPainterPath directly into a VGPath.
+    Q_D(QVGPaintEngine);
+    QVGPainterState *s = state();
+    VGPath vgpath = d->painterPathToVGPath(path);
+    if (path.fillRule() == Qt::OddEvenFill)
+        d->draw(vgpath, s->pen, s->brush, VG_EVEN_ODD);
+    else
+        d->draw(vgpath, s->pen, s->brush, VG_NON_ZERO);
+    vgDestroyPath(vgpath);
+}
+
+void QVGPaintEngine::drawPoints(const QPointF *points, int pointCount)
+{
+#if !defined(QVG_NO_MODIFY_PATH)
+    Q_D(QVGPaintEngine);
+
+    // Set up a new pen if necessary.
+    QPen pen = state()->pen;
+    if (pen.style() == Qt::NoPen)
+        return;
+    if (pen.capStyle() == Qt::FlatCap)
+        pen.setCapStyle(Qt::SquareCap);
+
+    for (int i = 0; i < pointCount; ++i, ++points) {
+        VGfloat coords[4];
+        if (d->simpleTransform) {
+            coords[0] = points->x();
+            coords[1] = points->y();
+            coords[2] = coords[0];
+            coords[3] = coords[1];
+        } else {
+            QPointF p = d->transform.map(*points);
+            coords[0] = p.x();
+            coords[1] = p.y();
+            coords[2] = coords[0];
+            coords[3] = coords[1];
+        }
+        vgModifyPathCoords(d->linePath, 0, 2, coords);
+        d->stroke(d->linePath, pen);
+    }
+#else
+    QPaintEngineEx::drawPoints(points, pointCount);
+#endif
+}
+
+void QVGPaintEngine::drawPoints(const QPoint *points, int pointCount)
+{
+#if !defined(QVG_NO_MODIFY_PATH)
+    Q_D(QVGPaintEngine);
+
+    // Set up a new pen if necessary.
+    QPen pen = state()->pen;
+    if (pen.style() == Qt::NoPen)
+        return;
+    if (pen.capStyle() == Qt::FlatCap)
+        pen.setCapStyle(Qt::SquareCap);
+
+    for (int i = 0; i < pointCount; ++i, ++points) {
+        VGfloat coords[4];
+        if (d->simpleTransform) {
+            coords[0] = points->x();
+            coords[1] = points->y();
+            coords[2] = coords[0];
+            coords[3] = coords[1];
+        } else {
+            QPointF p = d->transform.map(QPointF(*points));
+            coords[0] = p.x();
+            coords[1] = p.y();
+            coords[2] = coords[0];
+            coords[3] = coords[1];
+        }
+        vgModifyPathCoords(d->linePath, 0, 2, coords);
+        d->stroke(d->linePath, pen);
+    }
+#else
+    QPaintEngineEx::drawPoints(points, pointCount);
+#endif
+}
+
+void QVGPaintEngine::drawPolygon(const QPointF *points, int pointCount, PolygonDrawMode mode)
+{
+    Q_D(QVGPaintEngine);
+    QVGPainterState *s = state();
+    VGPath path = vgCreatePath(VG_PATH_FORMAT_STANDARD,
+                               VG_PATH_DATATYPE_F,
+                               1.0f,             // scale
+                               0.0f,             // bias
+                               pointCount + 1,   // segmentCapacityHint
+                               pointCount * 2,   // coordCapacityHint
+                               VG_PATH_CAPABILITY_ALL);
+    QVarLengthArray<VGfloat, 16> coords;
+    QVarLengthArray<VGubyte, 10> segments;
+    for (int i = 0; i < pointCount; ++i, ++points) {
+        if (d->simpleTransform) {
+            coords.append(points->x());
+            coords.append(points->y());
+        } else {
+            QPointF temp = d->transform.map(*points);
+            coords.append(temp.x());
+            coords.append(temp.y());
+        }
+        if (i == 0)
+            segments.append(VG_MOVE_TO_ABS);
+        else
+            segments.append(VG_LINE_TO_ABS);
+    }
+    if (mode != QPaintEngine::PolylineMode)
+        segments.append(VG_CLOSE_PATH);
+    vgAppendPathData(path, segments.count(),
+                     segments.constData(), coords.constData());
+    switch (mode) {
+        case QPaintEngine::WindingMode:
+            d->draw(path, s->pen, s->brush, VG_NON_ZERO);
+            break;
+
+        case QPaintEngine::PolylineMode:
+            d->stroke(path, s->pen);
+            break;
+
+        default:
+            d->draw(path, s->pen, s->brush, VG_EVEN_ODD);
+            break;
+    }
+    vgDestroyPath(path);
+}
+
+void QVGPaintEngine::drawPolygon(const QPoint *points, int pointCount, PolygonDrawMode mode)
+{
+    Q_D(QVGPaintEngine);
+    QVGPainterState *s = state();
+    VGPath path = vgCreatePath(VG_PATH_FORMAT_STANDARD,
+                               VG_PATH_DATATYPE_F,
+                               1.0f,             // scale
+                               0.0f,             // bias
+                               pointCount + 1,   // segmentCapacityHint
+                               pointCount * 2,   // coordCapacityHint
+                               VG_PATH_CAPABILITY_ALL);
+    QVarLengthArray<VGfloat, 16> coords;
+    QVarLengthArray<VGubyte, 10> segments;
+    for (int i = 0; i < pointCount; ++i, ++points) {
+        if (d->simpleTransform) {
+            coords.append(points->x());
+            coords.append(points->y());
+        } else {
+            QPointF temp = d->transform.map(QPointF(*points));
+            coords.append(temp.x());
+            coords.append(temp.y());
+        }
+        if (i == 0)
+            segments.append(VG_MOVE_TO_ABS);
+        else
+            segments.append(VG_LINE_TO_ABS);
+    }
+    if (mode != QPaintEngine::PolylineMode)
+        segments.append(VG_CLOSE_PATH);
+    vgAppendPathData(path, segments.count(),
+                     segments.constData(), coords.constData());
+    switch (mode) {
+        case QPaintEngine::WindingMode:
+            d->draw(path, s->pen, s->brush, VG_NON_ZERO);
+            break;
+
+        case QPaintEngine::PolylineMode:
+            d->stroke(path, s->pen);
+            break;
+
+        default:
+            d->draw(path, s->pen, s->brush, VG_EVEN_ODD);
+            break;
+    }
+    vgDestroyPath(path);
+}
+
+void QVGPaintEnginePrivate::setImageOptions()
+{
+    if (opacity != 1.0f && simpleTransform) {
+        if (opacity != paintOpacity) {
+            VGfloat values[4];
+            values[0] = 1.0f;
+            values[1] = 1.0f;
+            values[2] = 1.0f;
+            values[3] = opacity;
+            vgSetParameterfv(opacityPaint, VG_PAINT_COLOR, 4, values);
+            paintOpacity = opacity;
+        }
+        if (fillPaint != opacityPaint) {
+            vgSetPaint(opacityPaint, VG_FILL_PATH);
+            fillPaint = opacityPaint;
+        }
+        setImageMode(VG_DRAW_IMAGE_MULTIPLY);
+    } else {
+        setImageMode(VG_DRAW_IMAGE_NORMAL);
+    }
+}
+
+static void drawVGImage(QVGPaintEnginePrivate *d,
+                        const QRectF& r, VGImage vgImg,
+                        const QSize& imageSize, const QRectF& sr)
+{
+    if (vgImg == VG_INVALID_HANDLE)
+        return;
+    VGImage child = VG_INVALID_HANDLE;
+
+    if (sr.topLeft().isNull() && sr.size() == imageSize) {
+        child = vgImg;
+    } else {
+        QRect src = sr.toRect();
+#if !defined(QT_SHIVAVG)
+        child = vgChildImage(vgImg, src.x(), src.y(), src.width(), src.height());
+#else
+        child = vgImg;  // XXX: ShivaVG doesn't have vgChildImage().
+#endif
+    }
+
+    QTransform transform(d->imageTransform);
+    VGfloat scaleX = sr.width() == 0.0f ? 0.0f : r.width() / sr.width();
+    VGfloat scaleY = sr.height() == 0.0f ? 0.0f : r.height() / sr.height();
+    transform.translate(r.x(), r.y());
+    transform.scale(scaleX, scaleY);
+    d->setTransform(VG_MATRIX_IMAGE_USER_TO_SURFACE, transform);
+
+    d->setImageOptions();
+    vgDrawImage(child);
+
+    if(child != vgImg)
+        vgDestroyImage(child);
+}
+
+static void drawVGImage(QVGPaintEnginePrivate *d,
+                        const QPointF& pos, VGImage vgImg)
+{
+    if (vgImg == VG_INVALID_HANDLE)
+        return;
+
+    QTransform transform(d->imageTransform);
+    transform.translate(pos.x(), pos.y());
+    d->setTransform(VG_MATRIX_IMAGE_USER_TO_SURFACE, transform);
+
+    d->setImageOptions();
+    vgDrawImage(vgImg);
+}
+
+// Used by qpixmapfilter_vg.cpp to draw filtered VGImage's.
+void qt_vg_drawVGImage(QPainter *painter, const QPointF& pos, VGImage vgImg)
+{
+    QVGPaintEngine *engine =
+        static_cast<QVGPaintEngine *>(painter->paintEngine());
+    drawVGImage(engine->vgPrivate(), pos, vgImg);
+}
+
+// Used by qpixmapfilter_vg.cpp to draw filtered VGImage's as a stencil.
+void qt_vg_drawVGImageStencil
+    (QPainter *painter, const QPointF& pos, VGImage vgImg, const QBrush& brush)
+{
+    QVGPaintEngine *engine =
+        static_cast<QVGPaintEngine *>(painter->paintEngine());
+
+    QVGPaintEnginePrivate *d = engine->vgPrivate();
+
+    QTransform transform(d->imageTransform);
+    transform.translate(pos.x(), pos.y());
+    d->setTransform(VG_MATRIX_IMAGE_USER_TO_SURFACE, transform);
+
+    d->ensureBrush(brush);
+    d->setImageMode(VG_DRAW_IMAGE_STENCIL);
+    vgDrawImage(vgImg);
+}
+
+void QVGPaintEngine::drawPixmap(const QRectF &r, const QPixmap &pm, const QRectF &sr)
+{
+    QPixmapData *pd = pm.pixmapData();
+    if (pd->classId() == QPixmapData::OpenVGClass) {
+        Q_D(QVGPaintEngine);
+        QVGPixmapData *vgpd = static_cast<QVGPixmapData *>(pd);
+        if (!vgpd->isValid())
+            return;
+        if (d->simpleTransform)
+            drawVGImage(d, r, vgpd->toVGImage(), vgpd->size(), sr);
+        else
+            drawVGImage(d, r, vgpd->toVGImage(d->opacity), vgpd->size(), sr);
+    } else {
+        drawImage(r, *(pd->buffer()), sr, Qt::AutoColor);
+    }
+}
+
+void QVGPaintEngine::drawPixmap(const QPointF &pos, const QPixmap &pm)
+{
+    QPixmapData *pd = pm.pixmapData();
+    if (pd->classId() == QPixmapData::OpenVGClass) {
+        Q_D(QVGPaintEngine);
+        QVGPixmapData *vgpd = static_cast<QVGPixmapData *>(pd);
+        if (!vgpd->isValid())
+            return;
+        if (d->simpleTransform)
+            drawVGImage(d, pos, vgpd->toVGImage());
+        else
+            drawVGImage(d, pos, vgpd->toVGImage(d->opacity));
+    } else {
+        drawImage(pos, *(pd->buffer()));
+    }
+}
+
+void QVGPaintEngine::drawImage
+        (const QRectF &r, const QImage &image, const QRectF &sr,
+         Qt::ImageConversionFlags flags)
+{
+    Q_D(QVGPaintEngine);
+    VGImage vgImg;
+    if (d->simpleTransform || d->opacity == 1.0f)
+        vgImg = toVGImageSubRect(image, sr.toRect(), flags);
+    else
+        vgImg = toVGImageWithOpacitySubRect(image, d->opacity, sr.toRect());
+    if (vgImg != VG_INVALID_HANDLE) {
+        if (r.size() == sr.size()) {
+            drawVGImage(d, r.topLeft(), vgImg);
+        } else {
+            drawVGImage(d, r, vgImg, sr.size().toSize(),
+                        QRectF(QPointF(0, 0), sr.size()));
+        }
+    } else {
+        // Monochrome images need to use the vgChildImage() path.
+        vgImg = toVGImage(image, flags);
+        drawVGImage(d, r, vgImg, image.size(), sr);
+    }
+    vgDestroyImage(vgImg);
+}
+
+void QVGPaintEngine::drawImage(const QPointF &pos, const QImage &image)
+{
+    Q_D(QVGPaintEngine);
+    VGImage vgImg;
+    if (d->simpleTransform || d->opacity == 1.0f)
+        vgImg = toVGImage(image);
+    else
+        vgImg = toVGImageWithOpacity(image, d->opacity);
+    drawVGImage(d, pos, vgImg);
+    vgDestroyImage(vgImg);
+}
+
+void QVGPaintEngine::drawTiledPixmap
+        (const QRectF &r, const QPixmap &pixmap, const QPointF &s)
+{
+    QBrush brush(state()->pen.color(), pixmap);
+    QTransform xform;
+    xform.translate(-s.x(), -s.y());
+    brush.setTransform(xform);
+    fillRect(r, brush);
+}
+
+// Best performance will be achieved with QDrawPixmaps::OpaqueHint
+// (i.e. no opacity), no rotation or scaling, and drawing the full
+// pixmap rather than parts of the pixmap.  Even having just one of
+// these conditions will improve performance.
+void QVGPaintEngine::drawPixmaps
+    (const QDrawPixmaps::Data *drawingData, int dataCount,
+     const QPixmap &pixmap, QFlags<QDrawPixmaps::DrawingHint> hints)
+{
+#if !defined(QT_SHIVAVG)
+    Q_D(QVGPaintEngine);
+
+    // If the pixmap is not VG, or the transformation is projective,
+    // then fall back to the default implementation.
+    QPixmapData *pd = pixmap.pixmapData();
+    if (pd->classId() != QPixmapData::OpenVGClass || !d->simpleTransform) {
+        QPaintEngineEx::drawPixmaps(drawingData, dataCount, pixmap, hints);
+        return;
+    }
+
+    // Bail out if nothing to do.
+    if (dataCount <= 0)
+        return;
+
+    // Bail out if we don't have a usable VGImage for the pixmap.
+    QVGPixmapData *vgpd = static_cast<QVGPixmapData *>(pd);
+    if (!vgpd->isValid())
+        return;
+    VGImage vgImg = vgpd->toVGImage();
+    if (vgImg == VG_INVALID_HANDLE)
+        return;
+
+    // We cache the results of any vgChildImage() calls because the
+    // same child is very likely to be used over and over in particle
+    // systems.  However, performance is even better if vgChildImage()
+    // isn't needed at all, so use full source rects where possible.
+    QVarLengthArray<VGImage> cachedImages;
+    QVarLengthArray<QRect> cachedSources;
+
+    // Select the opacity paint object.
+    if ((hints & QDrawPixmaps::OpaqueHint) != 0 && d->opacity == 1.0f) {
+        d->setImageMode(VG_DRAW_IMAGE_NORMAL);
+    }  else {
+        hints = 0;
+        if (d->fillPaint != d->opacityPaint) {
+            vgSetPaint(d->opacityPaint, VG_FILL_PATH);
+            d->fillPaint = d->opacityPaint;
+        }
+    }
+
+    for (int i = 0; i < dataCount; ++i) {
+        QTransform transform(d->imageTransform);
+        transform.translate(drawingData[i].point.x(), drawingData[i].point.y());
+        transform.rotate(drawingData[i].rotation);
+
+        VGImage child;
+        QSize imageSize = vgpd->size();
+        QRectF sr = drawingData[i].source;
+        if (sr.topLeft().isNull() && sr.size() == imageSize) {
+            child = vgImg;
+        } else {
+            // Look for a previous child with the same source rectangle
+            // to avoid constantly calling vgChildImage()/vgDestroyImage().
+            QRect src = sr.toRect();
+            int j;
+            for (j = 0; j < cachedSources.size(); ++j) {
+                if (cachedSources[j] == src)
+                    break;
+            }
+            if (j < cachedSources.size()) {
+                child = cachedImages[j];
+            } else {
+                child = vgChildImage
+                    (vgImg, src.x(), src.y(), src.width(), src.height());
+                cachedImages.append(child);
+                cachedSources.append(src);
+            }
+        }
+
+        VGfloat scaleX = drawingData[i].scaleX;
+        VGfloat scaleY = drawingData[i].scaleY;
+        transform.translate(-0.5 * scaleX * sr.width(),
+                            -0.5 * scaleY * sr.height());
+        transform.scale(scaleX, scaleY);
+        d->setTransform(VG_MATRIX_IMAGE_USER_TO_SURFACE, transform);
+
+        if ((hints & QDrawPixmaps::OpaqueHint) == 0) {
+            qreal opacity = d->opacity * drawingData[i].opacity;
+            if (opacity != 1.0f) {
+                if (d->paintOpacity != opacity) {
+                    VGfloat values[4];
+                    values[0] = 1.0f;
+                    values[1] = 1.0f;
+                    values[2] = 1.0f;
+                    values[3] = opacity;
+                    d->paintOpacity = opacity;
+                    vgSetParameterfv
+                        (d->opacityPaint, VG_PAINT_COLOR, 4, values);
+                }
+                d->setImageMode(VG_DRAW_IMAGE_MULTIPLY);
+            } else {
+                d->setImageMode(VG_DRAW_IMAGE_NORMAL);
+            }
+        }
+
+        vgDrawImage(child);
+    }
+
+    // Destroy the cached child sub-images.
+    for (int i = 0; i < cachedImages.size(); ++i)
+        vgDestroyImage(cachedImages[i]);
+#else
+    QPaintEngineEx::drawPixmaps(drawingData, dataCount, pixmap, hints);
+#endif
+}
+
+QVGFontEngineCleaner::QVGFontEngineCleaner(QVGPaintEnginePrivate *d)
+    : QObject(), d_ptr(d)
+{
+}
+
+QVGFontEngineCleaner::~QVGFontEngineCleaner()
+{
+}
+
+void QVGFontEngineCleaner::fontEngineDestroyed()
+{
+#if !defined(QVG_NO_DRAW_GLYPHS)
+    QFontEngine *engine = static_cast<QFontEngine *>(sender());
+    QVGFontCache::Iterator it = d_ptr->fontCache.find(engine);
+    if (it != d_ptr->fontCache.end()) {
+        delete it.value();
+        d_ptr->fontCache.erase(it);
+    }
+#endif
+}
+
+#if !defined(QVG_NO_DRAW_GLYPHS)
+
+QVGFontGlyphCache::QVGFontGlyphCache()
+{
+    font = vgCreateFont(0);
+    scaleX = scaleY = 0.0;
+    memset(cachedGlyphsMask, 0, sizeof(cachedGlyphsMask));
+}
+
+QVGFontGlyphCache::~QVGFontGlyphCache()
+{
+    if (font != VG_INVALID_HANDLE)
+        vgDestroyFont(font);
+}
+
+void QVGFontGlyphCache::setScaleFromText(const QTextItemInt &ti)
+{
+    QFontInfo fi(ti.font());
+    qreal pixelSize = fi.pixelSize();
+    qreal emSquare = ti.fontEngine->properties().emSquare.toReal();
+    scaleX = scaleY = static_cast<VGfloat>(pixelSize / emSquare);
+}
+
+void QVGFontGlyphCache::cacheGlyphs
+        (QVGPaintEnginePrivate *d, const QTextItemInt &ti,
+         const QVarLengthArray<glyph_t> &glyphs)
+{
+    VGfloat origin[2];
+    VGfloat escapement[2];
+    const glyph_t *g = glyphs.constData();
+    int count = glyphs.size();
+    glyph_metrics_t metrics;
+    // Some Qt font engines don't set yoff in getUnscaledGlyph().
+    // Zero the metric structure so that everything has a default value.
+    memset(&metrics, 0, sizeof(metrics));
+    while (count-- > 0) {
+        // Skip this glyph if we have already cached it before.
+        glyph_t glyph = *g++;
+        if (glyph < 256) {
+            if ((cachedGlyphsMask[glyph / 32] & (1 << (glyph % 32))) != 0)
+                continue;
+            cachedGlyphsMask[glyph / 32] |= (1 << (glyph % 32));
+        } else if (cachedGlyphs.contains(glyph)) {
+            continue;
+        } else {
+            cachedGlyphs.insert(glyph);
+        }
+#if !defined(QVG_NO_IMAGE_GLYPHS)
+        Q_UNUSED(d);
+        QImage scaledImage = ti.fontEngine->alphaMapForGlyph(glyph);
+        VGImage vgImage = VG_INVALID_HANDLE;
+        metrics = ti.fontEngine->boundingBox(glyph);
+        if (!scaledImage.isNull()) {  // Not a space character
+            if (scaledImage.format() == QImage::Format_Indexed8) {
+                vgImage = vgCreateImage(VG_A_8, scaledImage.width(), scaledImage.height(), VG_IMAGE_QUALITY_FASTER);
+                vgImageSubData(vgImage, scaledImage.bits(), scaledImage.bytesPerLine(), VG_A_8, 0, 0, scaledImage.width(), scaledImage.height());
+            } else if (scaledImage.format() == QImage::Format_Mono) {
+                QImage img = scaledImage.convertToFormat(QImage::Format_Indexed8);
+                vgImage = vgCreateImage(VG_A_8, img.width(), img.height(), VG_IMAGE_QUALITY_FASTER);
+                vgImageSubData(vgImage, img.bits(), img.bytesPerLine(), VG_A_8, 0, 0, img.width(), img.height());
+            } else {
+                QImage img = scaledImage.convertToFormat(QImage::Format_ARGB32_Premultiplied);
+                vgImage = vgCreateImage(VG_sARGB_8888_PRE, img.width(), img.height(), VG_IMAGE_QUALITY_FASTER);
+                vgImageSubData(vgImage, img.bits(), img.bytesPerLine(), VG_sARGB_8888_PRE, 0, 0, img.width(), img.height());
+            }
+        }
+        origin[0] = -metrics.x.toReal() + 0.5f;
+        origin[1] = -metrics.y.toReal() + 0.5f;
+        escapement[0] = metrics.xoff.toReal();
+        escapement[1] = metrics.yoff.toReal();
+        vgSetGlyphToImage(font, glyph, vgImage, origin, escapement);
+        vgDestroyImage(vgImage);    // Reduce reference count.
+#else
+        // Calculate the path for the glyph and cache it.
+        QPainterPath path;
+        ti.fontEngine->getUnscaledGlyph(glyph, &path, &metrics);
+        VGPath vgPath;
+        if (!path.isEmpty()) {
+            vgPath = d->painterPathToVGPath(path);
+        } else {
+            // Probably a "space" character with no visible outline.
+            vgPath = VG_INVALID_HANDLE;
+        }
+        origin[0] = 0;
+        origin[1] = 0;
+        escapement[0] = metrics.xoff.toReal();
+        escapement[1] = metrics.yoff.toReal();
+        vgSetGlyphToPath(font, glyph, vgPath, VG_FALSE, origin, escapement);
+        vgDestroyPath(vgPath);      // Reduce reference count.
+#endif // !defined(QVG_NO_IMAGE_GLYPHS)
+    }
+}
+
+#endif // !defined(QVG_NO_DRAW_GLYPHS)
+
+void QVGPaintEngine::drawTextItem(const QPointF &p, const QTextItem &textItem)
+{
+#if !defined(QVG_NO_DRAW_GLYPHS)
+    Q_D(QVGPaintEngine);
+    const QTextItemInt &ti = static_cast<const QTextItemInt &>(textItem);
+
+    // If we are not using a simple transform, then fall back
+    // to the default Qt path stroking algorithm.
+    if (!d->simpleTransform) {
+        QPaintEngineEx::drawTextItem(p, textItem);
+        return;
+    }
+ 
+    // Get the glyphs and positions associated with the text item.
+    QVarLengthArray<QFixedPoint> positions;
+    QVarLengthArray<glyph_t> glyphs;
+    QTransform matrix = d->transform;
+    matrix.translate(p.x(), p.y());
+    ti.fontEngine->getGlyphPositions
+        (ti.glyphs, matrix, ti.flags, glyphs, positions);
+
+    // Find the glyph cache for this font.
+    QVGFontCache::ConstIterator it = d->fontCache.constFind(ti.fontEngine);
+    QVGFontGlyphCache *glyphCache;
+    if (it != d->fontCache.constEnd()) {
+        glyphCache = it.value();
+    } else {
+        glyphCache = new QVGFontGlyphCache();
+        if (glyphCache->font == VG_INVALID_HANDLE) {
+            qWarning("QVGPaintEngine::drawTextItem: OpenVG fonts are not supported by the OpenVG engine");
+            delete glyphCache;
+            QPaintEngineEx::drawTextItem(p, textItem);
+            return;
+        }
+        glyphCache->setScaleFromText(ti);
+        d->fontCache.insert(ti.fontEngine, glyphCache);
+        if (!d->fontEngineCleaner)
+            d->fontEngineCleaner = new QVGFontEngineCleaner(d);
+        QObject::connect(ti.fontEngine, SIGNAL(destroyed()),
+                         d->fontEngineCleaner, SLOT(fontEngineDestroyed()));
+    }
+
+    // Set the transformation to use for drawing the current glyphs.
+    QTransform glyphTransform(d->pathTransform);
+    glyphTransform.translate(p.x(), p.y());
+#if defined(QVG_NO_IMAGE_GLYPHS)
+    glyphTransform.scale(glyphCache->scaleX, glyphCache->scaleY);
+#endif
+    d->setTransform(VG_MATRIX_GLYPH_USER_TO_SURFACE, glyphTransform);
+
+    // Add the glyphs from the text item into the glyph cache.
+    glyphCache->cacheGlyphs(d, ti, glyphs);
+
+    // Set the glyph drawing origin.
+    VGfloat origin[2];
+    origin[0] = 0;
+    origin[1] = 0;
+    vgSetfv(VG_GLYPH_ORIGIN, 2, origin);
+
+    // Fast anti-aliasing for paths, better for images.
+#if !defined(QVG_NO_IMAGE_GLYPHS)
+    d->setImageQuality(VG_IMAGE_QUALITY_BETTER);
+    d->setImageMode(VG_DRAW_IMAGE_STENCIL);
+#else
+    d->setRenderingQuality(VG_RENDERING_QUALITY_FASTER);
+#endif
+
+    // Draw the glyphs.  We need to fill with the brush associated with
+    // the Qt pen, not the Qt brush.
+    d->ensureBrush(state()->pen.brush());
+    vgDrawGlyphs(glyphCache->font, glyphs.size(), (VGuint*)glyphs.data(),
+                 NULL, NULL, VG_FILL_PATH, VG_TRUE);
+#else
+    // OpenGL 1.0 does not have support for VGFont and glyphs,
+    // so fall back to the default Qt path stroking algorithm.
+    QPaintEngineEx::drawTextItem(p, textItem);
+#endif
+}
+
+void QVGPaintEngine::setState(QPainterState *s)
+{
+    Q_D(QVGPaintEngine);
+    QPaintEngineEx::setState(s);
+    QVGPainterState *ps = static_cast<QVGPainterState *>(s);
+    if (ps->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().
+        ps->isNew = false;
+    } else {
+        // This state object was set as part of a restore().
+        restoreState(d->dirty);
+        d->dirty = ps->savedDirty;
+    }
+}
+
+void QVGPaintEngine::beginNativePainting()
+{
+    Q_D(QVGPaintEngine);
+
+    // About to enter raw VG mode: flush pending changes and make
+    // sure that all matrices are set to the current transformation.
+    QVGPainterState *s = this->state();
+    d->ensurePen(s->pen);
+    d->ensureBrush(s->brush);
+    d->ensurePathTransform();
+    d->setTransform(VG_MATRIX_IMAGE_USER_TO_SURFACE, d->imageTransform);
+#if !defined(QVG_NO_DRAW_GLYPHS)
+    d->setTransform(VG_MATRIX_GLYPH_USER_TO_SURFACE, d->pathTransform);
+#endif
+    d->rawVG = true;
+}
+
+void QVGPaintEngine::endNativePainting()
+{
+    Q_D(QVGPaintEngine);
+    // Exiting raw VG mode: force all state values to be
+    // explicitly set on the VG engine to undo any changes
+    // that were made by the raw VG function calls.
+    QPaintEngine::DirtyFlags dirty = d->dirty;
+    d->clearModes();
+    d->forcePenChange = true;
+    d->forceBrushChange = true;
+    d->penType = (VGPaintType)0;
+    d->brushType = (VGPaintType)0;
+    d->clearColor = QColor();
+    d->fillPaint = d->brushPaint;
+    restoreState(QPaintEngine::AllDirty);
+    d->dirty = dirty;
+    d->rawVG = false;
+    vgSetPaint(d->penPaint, VG_STROKE_PATH);
+    vgSetPaint(d->brushPaint, VG_FILL_PATH);
+}
+
+QPixmapFilter *QVGPaintEngine::pixmapFilter(int type, const QPixmapFilter *prototype)
+{
+#if !defined(QT_SHIVAVG)
+    Q_D(QVGPaintEngine);
+    switch (type) {
+        case QPixmapFilter::ConvolutionFilter:
+            if (!d->convolutionFilter)
+                d->convolutionFilter.reset(new QVGPixmapConvolutionFilter);
+            return d->convolutionFilter.data();
+        case QPixmapFilter::ColorizeFilter:
+            if (!d->colorizeFilter)
+                d->colorizeFilter.reset(new QVGPixmapColorizeFilter);
+            return d->colorizeFilter.data();
+        case QPixmapFilter::DropShadowFilter:
+            if (!d->dropShadowFilter)
+                d->dropShadowFilter.reset(new QVGPixmapDropShadowFilter);
+            return d->dropShadowFilter.data();
+        case QPixmapFilter::BlurFilter:
+            if (!d->blurFilter)
+                d->blurFilter.reset(new QVGPixmapBlurFilter);
+            return d->blurFilter.data();
+        default: break;
+    }
+#endif
+    return QPaintEngineEx::pixmapFilter(type, prototype);
+}
+
+void QVGPaintEngine::restoreState(QPaintEngine::DirtyFlags dirty)
+{
+    Q_D(QVGPaintEngine);
+
+    // Restore the pen, brush, and other settings.
+    if ((dirty & QPaintEngine::DirtyBrushOrigin) != 0)
+        brushOriginChanged();
+    d->fillRule = 0;
+    if ((dirty & QPaintEngine::DirtyOpacity) != 0)
+        opacityChanged();
+    if ((dirty & QPaintEngine::DirtyTransform) != 0)
+        transformChanged();
+    if ((dirty & QPaintEngine::DirtyCompositionMode) != 0)
+        compositionModeChanged();
+    if ((dirty & QPaintEngine::DirtyHints) != 0)
+        renderHintsChanged();
+    if ((dirty & (QPaintEngine::DirtyClipRegion |
+                  QPaintEngine::DirtyClipPath |
+                  QPaintEngine::DirtyClipEnabled)) != 0) {
+        d->maskValid = false;
+        d->maskIsSet = false;
+        d->maskRect = QRect();
+        clipEnabledChanged();
+    }
+
+#if defined(QVG_SCISSOR_CLIP)
+    if ((dirty & (QPaintEngine::DirtyClipRegion |
+                  QPaintEngine::DirtyClipPath |
+                  QPaintEngine::DirtyClipEnabled)) == 0) {
+        updateScissor();
+    }
+#else
+    updateScissor();
+#endif
+}
+
+#if !defined(QVG_NO_SINGLE_CONTEXT) && !defined(QT_NO_EGL)
+
+QVGCompositionHelper::QVGCompositionHelper()
+{
+    d = qt_vg_create_paint_engine()->vgPrivate();
+}
+
+QVGCompositionHelper::~QVGCompositionHelper()
+{
+}
+
+void QVGCompositionHelper::startCompositing(const QSize& screenSize)
+{
+    this->screenSize = screenSize;
+    clearScissor();
+    d->setBlendMode(VG_BLEND_SRC_OVER);
+}
+
+void QVGCompositionHelper::endCompositing()
+{
+    clearScissor();
+}
+
+void QVGCompositionHelper::blitWindow
+    (QVGEGLWindowSurfacePrivate *surface, const QRect& rect,
+     const QPoint& topLeft, int opacity)
+{
+    // Get the VGImage that is acting as a back buffer for the window.
+    VGImage image = surface->surfaceImage();
+    if (image == VG_INVALID_HANDLE)
+        return;
+    QSize imageSize = surface->surfaceSize();
+
+    // Determine which sub rectangle of the window to draw.
+    QRect sr = rect.translated(-topLeft);
+
+    if (opacity >= 255) {
+        // Fully opaque: use vgSetPixels() to directly copy the sub-region.
+        int y = screenSize.height() - (rect.bottom() + 1);
+        vgSetPixels(rect.x(), y, image, sr.x(),
+                    imageSize.height() - (sr.y() + sr.height()),
+                    sr.width(), sr.height());
+    } else {
+        // Extract the child image that we want to draw.
+        VGImage child;
+        if (sr.topLeft().isNull() && sr.size() == imageSize)
+            child = image;
+        else {
+            child = vgChildImage
+                (image, sr.x(), imageSize.height() - (sr.y() + sr.height()),
+                 sr.width(), sr.height());
+        }
+
+        // Set the image transform.
+        QTransform transform;
+        int y = screenSize.height() - (rect.bottom() + 1);
+        transform.translate(rect.x() + 0.5f, y + 0.5f);
+        d->setTransform(VG_MATRIX_IMAGE_USER_TO_SURFACE, transform);
+
+        // Enable opacity for image drawing if necessary.
+        if (opacity < 255) {
+            if (opacity != d->paintOpacity) {
+                VGfloat values[4];
+                values[0] = 1.0f;
+                values[1] = 1.0f;
+                values[2] = 1.0f;
+                values[3] = ((VGfloat)opacity) / 255.0f;
+                vgSetParameterfv(d->opacityPaint, VG_PAINT_COLOR, 4, values);
+                d->paintOpacity = values[3];
+            }
+            if (d->fillPaint != d->opacityPaint) {
+                vgSetPaint(d->opacityPaint, VG_FILL_PATH);
+                d->fillPaint = d->opacityPaint;
+            }
+            d->setImageMode(VG_DRAW_IMAGE_MULTIPLY);
+        } else {
+            d->setImageMode(VG_DRAW_IMAGE_NORMAL);
+        }
+
+        // Draw the child image.
+        vgDrawImage(child);
+
+        // Destroy the child image.
+        if(child != image)
+            vgDestroyImage(child);
+    }
+}
+
+static void fillBackgroundRect(const QRect& rect, QVGPaintEnginePrivate *d)
+{
+    VGfloat coords[8];
+    coords[0] = rect.x();
+    coords[1] = rect.y();
+    coords[2] = rect.x() + rect.width();
+    coords[3] = coords[1];
+    coords[4] = coords[2];
+    coords[5] = rect.y() + rect.height();
+    coords[6] = coords[0];
+    coords[7] = coords[5];
+#if !defined(QVG_NO_MODIFY_PATH)
+    vgModifyPathCoords(d->rectPath, 0, 4, coords);
+    vgDrawPath(d->rectPath, VG_FILL_PATH);
+#else
+    Q_UNUSED(d);
+    VGPath rectPath = vgCreatePath
+            (VG_PATH_FORMAT_STANDARD,
+             VG_PATH_DATATYPE_F,
+             1.0f, // scale
+             0.0f, // bias
+             5,    // segmentCapacityHint
+             8,    // coordCapacityHint
+             VG_PATH_CAPABILITY_ALL);
+    static VGubyte const segments[5] = {
+        VG_MOVE_TO_ABS,
+        VG_LINE_TO_ABS,
+        VG_LINE_TO_ABS,
+        VG_LINE_TO_ABS,
+        VG_CLOSE_PATH
+    };
+    vgAppendPathData(rectPath, 5, segments, coords);
+    vgDrawPath(rectPath, VG_FILL_PATH);
+    vgDestroyPath(rectPath);
+#endif
+}
+
+void QVGCompositionHelper::fillBackground
+    (const QRegion& region, const QBrush& brush)
+{
+    // Set the path transform to the default viewport transformation.
+    VGfloat devh = screenSize.height() - 1;
+    QTransform viewport(1.0f, 0.0f, 0.0f,
+                        0.0f, -1.0f, 0.0f,
+                        0.5f, devh + 0.5f, 1.0f);
+    d->setTransform(VG_MATRIX_PATH_USER_TO_SURFACE, viewport);
+
+    // Set the brush to use to fill the background.
+    d->ensureBrush(brush);
+    d->setFillRule(VG_EVEN_ODD);
+
+    if (region.numRects() == 1) {
+        fillBackgroundRect(region.boundingRect(), d);
+    } else {
+        const QVector<QRect> rects = region.rects();
+        for (int i = 0; i < rects.size(); ++i)
+            fillBackgroundRect(rects.at(i), d);
+    }
+
+    // We will need to reset the path transform during the next paint.
+    d->pathTransformSet = false;
+}
+
+void QVGCompositionHelper::drawCursorImage
+    (const QImage& image, const QPoint& offset)
+{
+    QImage img = image.convertToFormat(QImage::Format_ARGB32_Premultiplied);
+
+    VGImage vgImg = vgCreateImage
+        (VG_sARGB_8888_PRE, img.width(), img.height(),
+         VG_IMAGE_QUALITY_FASTER);
+    vgImageSubData
+        (vgImg, img.bits() + img.bytesPerLine() * (img.height() - 1),
+         -(img.bytesPerLine()), VG_sARGB_8888_PRE, 0, 0,
+         img.width(), img.height());
+
+    QTransform transform;
+    int y = screenSize.height() - (offset.y() + img.height());
+    transform.translate(offset.x() + 0.5f, y + 0.5f);
+    d->setTransform(VG_MATRIX_IMAGE_USER_TO_SURFACE, transform);
+
+    d->setImageMode(VG_DRAW_IMAGE_NORMAL);
+    vgDrawImage(vgImg);
+
+    vgDestroyImage(vgImg);
+}
+
+void QVGCompositionHelper::drawCursorPixmap
+    (const QPixmap& pixmap, const QPoint& offset)
+{
+    QPixmapData *pd = pixmap.pixmapData();
+    if (pd->classId() == QPixmapData::OpenVGClass) {
+        QVGPixmapData *vgpd = static_cast<QVGPixmapData *>(pd);
+        if (vgpd->isValid()) {
+            VGfloat devh = screenSize.height() - 1;
+            QTransform transform(1.0f, 0.0f, 0.0f,
+                                 0.0f, -1.0f, 0.0f,
+                                 0.5f, devh + 0.5f, 1.0f);
+            transform.translate(offset.x(), offset.y());
+            d->setTransform(VG_MATRIX_IMAGE_USER_TO_SURFACE, transform);
+
+            d->setImageMode(VG_DRAW_IMAGE_NORMAL);
+            vgDrawImage(vgpd->toVGImage());
+            return;
+        }
+    }
+
+    drawCursorImage(pixmap.toImage(), offset);
+}
+
+void QVGCompositionHelper::setScissor(const QRegion& region)
+{
+    QVector<QRect> rects = region.rects();
+    int count = rects.count();
+    if (count > d->maxScissorRects)
+        count = d->maxScissorRects;
+    QVarLengthArray<VGint> params(count * 4);
+    int height = screenSize.height();
+    for (int i = 0; i < count; ++i) {
+        params[i * 4 + 0] = rects[i].x();
+        params[i * 4 + 1] = height - rects[i].y() - rects[i].height();
+        params[i * 4 + 2] = rects[i].width();
+        params[i * 4 + 3] = rects[i].height();
+    }
+
+    vgSetiv(VG_SCISSOR_RECTS, count * 4, params.data());
+    vgSeti(VG_SCISSORING, VG_TRUE);
+    d->scissorActive = true;
+    d->scissorRegion = region;
+}
+
+void QVGCompositionHelper::clearScissor()
+{
+    if (d->scissorActive) {
+        vgSeti(VG_SCISSORING, VG_FALSE);
+        d->scissorActive = false;
+    }
+}
+
+#endif // !QVG_NO_SINGLE_CONTEXT && !QT_NO_EGL
+
+VGImageFormat qt_vg_image_to_vg_format(QImage::Format format)
+{
+    switch (format) {
+        case QImage::Format_MonoLSB:
+            return VG_BW_1;
+        case QImage::Format_ARGB32_Premultiplied:
+            return VG_sARGB_8888_PRE;
+        case QImage::Format_RGB32:
+            return VG_sXRGB_8888;
+        case QImage::Format_ARGB32:
+            return VG_sARGB_8888;
+        case QImage::Format_RGB16:
+            return VG_sRGB_565;
+        case QImage::Format_ARGB4444_Premultiplied:
+            return VG_sARGB_4444;
+        default: break;
+    }
+    return VG_sARGB_8888;   // XXX
+}
+
+QT_END_NAMESPACE
+
+#include "qpaintengine_vg.moc"