1 files changed, 23 insertions, 28 deletions

diff --git a/src/gui/painting/qpainter.cpp b/src/gui/painting/qpainter.cpp
index aa684864e8..d46b30b6e2 100644
--- a/src/gui/painting/qpainter.cpp
+++ b/src/gui/painting/qpainter.cpp
@@ -149,14 +149,6 @@ static inline uint line_emulation(uint emulation)
                         | QPaintEngine_OpaqueBackground);
 }
 
-static bool qt_paintengine_supports_transformations(QPaintEngine::Type type)
-{
-    return type == QPaintEngine::OpenGL2
-            || type == QPaintEngine::OpenVG
-            || type == QPaintEngine::OpenGL
-            || type == QPaintEngine::CoreGraphics;
-}
-
 #ifndef QT_NO_DEBUG
 static bool qt_painter_thread_test(int devType, const char *what, bool extraCondition = false)
 {
@@ -5683,35 +5675,37 @@ void QPainter::drawGlyphRun(const QPointF &position, const QGlyphRun &glyphRun)
     if (!font.isValid())
         return;
 
-    QVector<quint32> glyphIndexes = glyphRun.glyphIndexes();
-    QVector<QPointF> glyphPositions = glyphRun.positions();
+    QGlyphRunPrivate *glyphRun_d = QGlyphRunPrivate::get(glyphRun);
 
-    int count = qMin(glyphIndexes.size(), glyphPositions.size());
-    QVarLengthArray<QFixedPoint, 128> fixedPointPositions(count);
+    const quint32 *glyphIndexes = glyphRun_d->glyphIndexData;
+    const QPointF *glyphPositions = glyphRun_d->glyphPositionData;
 
-    bool paintEngineSupportsTransformations =
-            d->extended != 0
-            ? qt_paintengine_supports_transformations(d->extended->type())
-            : qt_paintengine_supports_transformations(d->engine->type());
+    int count = qMin(glyphRun_d->glyphIndexDataSize, glyphRun_d->glyphPositionDataSize);
+    QVarLengthArray<QFixedPoint, 128> fixedPointPositions(count);
 
-    // If the matrix is not affine, the paint engine will fall back to
-    // drawing the glyphs as paths, which in turn means we should not
-    // preprocess the glyph positions
-    if (!d->state->matrix.isAffine())
-        paintEngineSupportsTransformations = true;
+    QRawFontPrivate *fontD = QRawFontPrivate::get(font);
+    bool supportsTransformations;
+    if (d->extended != 0) {
+        supportsTransformations = d->extended->supportsTransformations(fontD->fontEngine->fontDef.pixelSize,
+                                                                       d->state->matrix);
+    } else {
+        supportsTransformations = d->engine->type() == QPaintEngine::CoreGraphics
+                                  || d->state->matrix.isAffine();
+    }
 
     for (int i=0; i<count; ++i) {
-        QPointF processedPosition = position + glyphPositions.at(i);
-        if (!paintEngineSupportsTransformations)
+        QPointF processedPosition = position + glyphPositions[i];
+        if (!supportsTransformations)
             processedPosition = d->state->transform().map(processedPosition);
         fixedPointPositions[i] = QFixedPoint::fromPointF(processedPosition);
     }
 
-    d->drawGlyphs(glyphIndexes.data(), fixedPointPositions.data(), count, font, glyphRun.overline(),
+    d->drawGlyphs(glyphIndexes, fixedPointPositions.data(), count, font, glyphRun.overline(),
                   glyphRun.underline(), glyphRun.strikeOut());
 }
 
-void QPainterPrivate::drawGlyphs(quint32 *glyphArray, QFixedPoint *positions, int glyphCount,
+void QPainterPrivate::drawGlyphs(const quint32 *glyphArray, QFixedPoint *positions,
+                                 int glyphCount,
                                  const QRawFont &font, bool overline, bool underline,
                                  bool strikeOut)
 {
@@ -5878,11 +5872,12 @@ void QPainter::drawStaticText(const QPointF &topLeftPosition, const QStaticText
         return;
     }
 
-    bool paintEngineSupportsTransformations = qt_paintengine_supports_transformations(d->extended->type());
-    if (paintEngineSupportsTransformations && !staticText_d->untransformedCoordinates) {
+    bool supportsTransformations = d->extended->supportsTransformations(staticText_d->font.pixelSize(),
+                                                                        d->state->matrix);
+    if (supportsTransformations && !staticText_d->untransformedCoordinates) {
         staticText_d->untransformedCoordinates = true;
         staticText_d->needsRelayout = true;
-    } else if (!paintEngineSupportsTransformations && staticText_d->untransformedCoordinates) {
+    } else if (!supportsTransformations && staticText_d->untransformedCoordinates) {
         staticText_d->untransformedCoordinates = false;
         staticText_d->needsRelayout = true;
     }