3 files changed, 97 insertions, 16 deletions

diff --git a/src/gui/painting/qpaintengineex.cpp b/src/gui/painting/qpaintengineex.cpp
index 28f9220..3cf5ff9 100644
--- a/src/gui/painting/qpaintengineex.cpp
+++ b/src/gui/painting/qpaintengineex.cpp
@@ -138,6 +138,76 @@ QPaintEngineExPrivate::~QPaintEngineExPrivate()
 }
 
 
+void QPaintEngineExPrivate::replayClipOperations()
+{
+    Q_Q(QPaintEngineEx);
+
+    QPainter *p = q->painter();
+    if (!p || !p->d_ptr)
+        return;
+
+    QPainterPrivate *pp = p->d_ptr;
+    QList<QPainterClipInfo> clipInfo = pp->state->clipInfo;
+
+    QTransform transform = q->state()->matrix;
+
+    QTransform redirection;
+    redirection.translate(-q->state()->redirection_offset.x(), -q->state()->redirection_offset.y());
+
+    for (int i = 0; i <  clipInfo.size(); ++i) {
+        const QPainterClipInfo &info = clipInfo.at(i);
+
+        QTransform combined = info.matrix * redirection;
+
+        if (combined != q->state()->matrix) {
+            q->state()->matrix = combined;
+            q->transformChanged();
+        }
+
+        switch (info.clipType) {
+        case QPainterClipInfo::RegionClip:
+            q->clip(info.region, info.operation);
+            break;
+        case QPainterClipInfo::PathClip:
+            q->clip(info.path, info.operation);
+            break;
+        case QPainterClipInfo::RectClip:
+            q->clip(info.rect, info.operation);
+            break;
+        case QPainterClipInfo::RectFClip: {
+            qreal right = info.rectf.x() + info.rectf.width();
+            qreal bottom = info.rectf.y() + info.rectf.height();
+            qreal pts[] = { info.rectf.x(), info.rectf.y(),
+                            right, info.rectf.y(),
+                            right, bottom,
+                            info.rectf.x(), bottom };
+            QVectorPath vp(pts, 4, 0, QVectorPath::RectangleHint);
+            q->clip(vp, info.operation);
+            break;
+            }
+        }
+    }
+
+    if (transform != q->state()->matrix) {
+        q->state()->matrix = transform;
+        q->transformChanged();
+    }
+}
+
+
+bool QPaintEngineExPrivate::hasClipOperations() const
+{
+    Q_Q(const QPaintEngineEx);
+
+    QPainter *p = q->painter();
+    if (!p || !p->d_ptr)
+        return false;
+
+    QPainterPrivate *pp = p->d_ptr;
+    QList<QPainterClipInfo> clipInfo = pp->state->clipInfo;
+
+    return !clipInfo.isEmpty();
+}
 
 /*******************************************************************************
  *
@@ -244,13 +314,18 @@ static void qpaintengineex_cubicTo(qreal c1x, qreal c1y, qreal c2x, qreal c2y, q
     ((StrokeHandler *) data)->types.add(QPainterPath::CurveToDataElement);
 }
 
+QPaintEngineEx::QPaintEngineEx()
+    : QPaintEngine(*new QPaintEngineExPrivate, AllFeatures)
+{
+    extended = true;
+}
+
 QPaintEngineEx::QPaintEngineEx(QPaintEngineExPrivate &data)
     : QPaintEngine(data, AllFeatures)
 {
     extended = true;
 }
 
-
 QPainterState *QPaintEngineEx::createState(QPainterState *orig) const
 {
     if (!orig)
@@ -483,6 +558,9 @@ void QPaintEngineEx::clip(const QRect &r, Qt::ClipOperation op)
 
 void QPaintEngineEx::clip(const QRegion &region, Qt::ClipOperation op)
 {
+    if (region.numRects() == 1)
+        clip(region.boundingRect(), op);
+
     QVector<QRect> rects = region.rects();
     if (rects.size() <= 32) {
         qreal pts[2*32*4];
diff --git a/src/gui/painting/qpaintengineex_p.h b/src/gui/painting/qpaintengineex_p.h
index 1c55242..3f64260 100644
--- a/src/gui/painting/qpaintengineex_p.h
+++ b/src/gui/painting/qpaintengineex_p.h
@@ -139,27 +139,13 @@ public:
 QDebug Q_GUI_EXPORT &operator<<(QDebug &, const QVectorPath &path);
 #endif
 
-class Q_GUI_EXPORT QPaintEngineExPrivate : public QPaintEnginePrivate
-{
-public:
-    QPaintEngineExPrivate();
-    ~QPaintEngineExPrivate();
-
-    QStroker stroker;
-    QDashStroker dasher;
-    StrokeHandler *strokeHandler;
-    QStrokerOps *activeStroker;
-    QPen strokerPen;
-};
-
 class QPixmapFilter;
 
 class Q_GUI_EXPORT QPaintEngineEx : public QPaintEngine
 {
     Q_DECLARE_PRIVATE(QPaintEngineEx)
 public:
-    inline QPaintEngineEx()
-        : QPaintEngine(*new QPaintEngineExPrivate, AllFeatures) { extended = true; }
+    QPaintEngineEx();
 
     virtual QPainterState *createState(QPainterState *orig) const;
 
@@ -224,6 +210,22 @@ protected:
     QPaintEngineEx(QPaintEngineExPrivate &data);
 };
 
+class Q_GUI_EXPORT QPaintEngineExPrivate : public QPaintEnginePrivate
+{
+    Q_DECLARE_PUBLIC(QPaintEngineEx)
+public:
+    QPaintEngineExPrivate();
+    ~QPaintEngineExPrivate();
+
+    void replayClipOperations();
+    bool hasClipOperations() const;
+
+    QStroker stroker;
+    QDashStroker dasher;
+    StrokeHandler *strokeHandler;
+    QStrokerOps *activeStroker;
+    QPen strokerPen;
+};
 
 inline uint QVectorPath::polygonFlags(QPaintEngine::PolygonDrawMode mode) {
     switch (mode) {
diff --git a/src/gui/painting/qpainter.h b/src/gui/painting/qpainter.h
index f3df7a3..78cd713 100644
--- a/src/gui/painting/qpainter.h
+++ b/src/gui/painting/qpainter.h
@@ -507,6 +507,7 @@ private:
     friend class QFontEngineXLFD;
     friend class QWSManager;
     friend class QPaintEngine;
+    friend class QPaintEngineExPrivate;
     friend class QOpenGLPaintEngine;
     friend class QX11PaintEngine;
     friend class QX11PaintEnginePrivate;