diff -r b72c6db6890b -r 5dc02b23752f src/gui/painting/qpaintengineex.cpp
--- a/src/gui/painting/qpaintengineex.cpp	Wed Jun 23 19:07:03 2010 +0300
+++ b/src/gui/painting/qpaintengineex.cpp	Tue Jul 06 15:10:48 2010 +0300
@@ -149,6 +149,7 @@
 
 
 struct StrokeHandler {
+    StrokeHandler(int reserve) : pts(reserve), types(reserve) {}
     QDataBuffer<qreal> pts;
     QDataBuffer<QPainterPath::ElementType> types;
 };
@@ -394,7 +395,7 @@
         return;
 
     if (!d->strokeHandler) {
-        d->strokeHandler = new StrokeHandler;
+        d->strokeHandler = new StrokeHandler(path.elementCount()+4);
         d->stroker.setMoveToHook(qpaintengineex_moveTo);
         d->stroker.setLineToHook(qpaintengineex_lineTo);
         d->stroker.setCubicToHook(qpaintengineex_cubicTo);
@@ -460,6 +461,7 @@
         // change the current transform. Normal transformed,
         // non-cosmetic pens will be transformed as part of fill
         // later, so they are also covered here..
+        d->activeStroker->setCurveThresholdFromTransform(state()->matrix);
         d->activeStroker->begin(d->strokeHandler);
         if (types) {
             while (points < lastPoint) {
@@ -517,6 +519,7 @@
             QPainterPath painterPath = state()->matrix.map(path.convertToPainterPath());
             d->activeStroker->strokePath(painterPath, d->strokeHandler, QTransform());
         } else {
+            d->activeStroker->setCurveThresholdFromTransform(state()->matrix);
             d->activeStroker->begin(d->strokeHandler);
             if (types) {
                 while (points < lastPoint) {
@@ -607,11 +610,11 @@
 {
     qreal right = r.x() + r.width();
     qreal bottom = r.y() + r.height();
-    qreal pts[] = { r.x(), r.y(),
-                    right, r.y(),
+    qreal pts[] = { qreal(r.x()), qreal(r.y()),
+                    right, qreal(r.y()),
                     right, bottom,
-                    r.x(), bottom,
-                    r.x(), r.y() };
+                    qreal(r.x()), bottom,
+                    qreal(r.x()), qreal(r.y()) };
     QVectorPath vp(pts, 5, 0, QVectorPath::RectangleHint);
     clip(vp, op);
 }
@@ -711,11 +714,11 @@
         // ### Is there a one off here?
         qreal right = r.x() + r.width();
         qreal bottom = r.y() + r.height();
-        qreal pts[] = { r.x(), r.y(),
-                        right, r.y(),
+        qreal pts[] = { qreal(r.x()), qreal(r.y()),
+                        right, qreal(r.y()),
                         right, bottom,
-                        r.x(), bottom,
-                        r.x(), r.y() };
+                        qreal(r.x()), bottom,
+                        qreal(r.x()), qreal(r.y()) };
         QVectorPath vp(pts, 5, 0, QVectorPath::RectangleHint);
         draw(vp);
     }
@@ -893,7 +896,7 @@
             for (int i=0; i<count; ++i) {
                 pts[++oset] = points[i].x();
                 pts[++oset] = points[i].y();
-                pts[++oset] = points[i].x() + 1/63;
+                pts[++oset] = points[i].x() + 1/63.;
                 pts[++oset] = points[i].y();
             }
             QVectorPath path(pts, count * 2, qpaintengineex_line_types_16, QVectorPath::LinesHint);
@@ -903,7 +906,8 @@
         }
     } else {
         for (int i=0; i<pointCount; ++i) {
-            qreal pts[] = { points[i].x(), points[i].y(), points[i].x() +1/63., points[i].y() };
+            qreal pts[] = { qreal(points[i].x()), qreal(points[i].y()),
+                            qreal(points[i].x() +1/63.), qreal(points[i].y()) };
             QVectorPath path(pts, 2, 0);
             stroke(path, pen);
         }
@@ -970,23 +974,29 @@
     fill(path, brush);
 }
 
-void QPaintEngineEx::drawPixmaps(const QDrawPixmaps::Data *drawingData, int dataCount, const QPixmap &pixmap, QDrawPixmaps::DrawingHints /*hints*/)
+void QPaintEngineEx::drawPixmapFragments(const QPainter::PixmapFragment *fragments, int fragmentCount,
+                                         const QPixmap &pixmap, QPainter::PixmapFragmentHints /*hints*/)
 {
+    if (pixmap.isNull())
+        return;
+
     qreal oldOpacity = state()->opacity;
     QTransform oldTransform = state()->matrix;
 
-    for (int i = 0; i < dataCount; ++i) {
+    for (int i = 0; i < fragmentCount; ++i) {
         QTransform transform = oldTransform;
-        transform.translate(drawingData[i].point.x(), drawingData[i].point.y());
-        transform.rotate(drawingData[i].rotation);
-        state()->opacity = oldOpacity * drawingData[i].opacity;
+        transform.translate(fragments[i].x, fragments[i].y);
+        transform.rotate(fragments[i].rotation);
+        state()->opacity = oldOpacity * fragments[i].opacity;
         state()->matrix = transform;
         opacityChanged();
         transformChanged();
 
-        qreal w = drawingData[i].scaleX * drawingData[i].source.width();
-        qreal h = drawingData[i].scaleY * drawingData[i].source.height();
-        drawPixmap(QRectF(-0.5 * w, -0.5 * h, w, h), pixmap, drawingData[i].source);
+        qreal w = fragments[i].scaleX * fragments[i].width;
+        qreal h = fragments[i].scaleY * fragments[i].height;
+        QRectF sourceRect(fragments[i].sourceLeft, fragments[i].sourceTop,
+                          fragments[i].width, fragments[i].height);
+        drawPixmap(QRectF(-0.5 * w, -0.5 * h, w, h), pixmap, sourceRect);
     }
 
     state()->opacity = oldOpacity;