4 files changed, 68 insertions, 14 deletions

diff --git a/src/gui/painting/qpaintengine_raster.cpp b/src/gui/painting/qpaintengine_raster.cpp
index f0bc0d6..4f8af48 100644
--- a/src/gui/painting/qpaintengine_raster.cpp
+++ b/src/gui/painting/qpaintengine_raster.cpp
@@ -3029,8 +3029,16 @@ void QRasterPaintEngine::drawStaticTextItem(QStaticTextItem *textItem)
     ensurePen();
     ensureState();
 
-    drawCachedGlyphs(textItem->numGlyphs, textItem->glyphs, textItem->glyphPositions,
-                     textItem->fontEngine());
+    QRasterPaintEngineState *s = state();
+
+    QFontEngine *fontEngine = textItem->fontEngine();
+    const qreal pixelSize = fontEngine->fontDef.pixelSize;
+    if (pixelSize * pixelSize * qAbs(s->matrix.determinant()) < 64 * 64) {
+        drawCachedGlyphs(textItem->numGlyphs, textItem->glyphs, textItem->glyphPositions,
+                         fontEngine);
+    } else {
+        QPaintEngineEx::drawStaticTextItem(textItem);
+    }
 }
 
 /*!
diff --git a/src/gui/painting/qpaintengineex.cpp b/src/gui/painting/qpaintengineex.cpp
index bbdf76f..304e5fc 100644
--- a/src/gui/painting/qpaintengineex.cpp
+++ b/src/gui/painting/qpaintengineex.cpp
@@ -44,6 +44,8 @@
 #include "qstroker_p.h"
 #include "qbezier_p.h"
 #include <private/qpainterpath_p.h>
+#include <private/qfontengine_p.h>
+#include <private/qstatictext_p.h>
 
 #include <qvarlengtharray.h>
 #include <qdebug.h>
@@ -1057,5 +1059,38 @@ Q_GUI_EXPORT QPainterPath qt_painterPathFromVectorPath(const QVectorPath &path)
     return p;
 }
 
+void QPaintEngineEx::drawStaticTextItem(QStaticTextItem *staticTextItem)
+{
+    QPainterPath path;
+#ifndef Q_WS_MAC
+    path.setFillRule(Qt::WindingFill);
+#endif
+
+    if (staticTextItem->numGlyphs == 0)
+        return;
+
+    QFontEngine *fontEngine = staticTextItem->fontEngine();
+    fontEngine->addGlyphsToPath(staticTextItem->glyphs, staticTextItem->glyphPositions,
+                                staticTextItem->numGlyphs, &path, 0);
+    if (!path.isEmpty()) {
+        QPainterState *s = state();
+        QPainter::RenderHints oldHints = s->renderHints;
+        bool changedHints = false;
+        if (bool(oldHints & QPainter::TextAntialiasing)
+            && !bool(fontEngine->fontDef.styleStrategy & QFont::NoAntialias)
+            && !bool(oldHints & QPainter::Antialiasing)) {
+            s->renderHints |= QPainter::Antialiasing;
+            renderHintsChanged();
+            changedHints = true;
+        }
+
+        fill(qtVectorPathForPath(path), staticTextItem->color);
+
+        if (changedHints) {
+            s->renderHints = oldHints;
+            renderHintsChanged();
+        }
+    }
+}
 
 QT_END_NAMESPACE
diff --git a/src/gui/painting/qpaintengineex_p.h b/src/gui/painting/qpaintengineex_p.h
index d12c602..7d57eee 100644
--- a/src/gui/painting/qpaintengineex_p.h
+++ b/src/gui/painting/qpaintengineex_p.h
@@ -202,7 +202,7 @@ public:
 
     virtual void updateState(const QPaintEngineState &state);
 
-    virtual void drawStaticTextItem(QStaticTextItem *) = 0;
+    virtual void drawStaticTextItem(QStaticTextItem *);
 
     virtual void setState(QPainterState *s);
     inline QPainterState *state() { return static_cast<QPainterState *>(QPaintEngine::state); }
diff --git a/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp b/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp
index 38bd58d..3cf8faa 100644
--- a/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp
+++ b/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp
@@ -1436,19 +1436,30 @@ void QGL2PaintEngineEx::drawStaticTextItem(QStaticTextItem *textItem)
 
     ensureActive();
 
-    QFontEngineGlyphCache::Type glyphType = textItem->fontEngine()->glyphFormat >= 0
-                                            ? QFontEngineGlyphCache::Type(textItem->fontEngine()->glyphFormat)
-                                            : d->glyphCacheType;
-    if (glyphType == QFontEngineGlyphCache::Raster_RGBMask) {
-        if (d->device->alphaRequested() || state()->matrix.type() > QTransform::TxTranslate
-            || (state()->composition_mode != QPainter::CompositionMode_Source
-            && state()->composition_mode != QPainter::CompositionMode_SourceOver))
-        {
-            glyphType = QFontEngineGlyphCache::Raster_A8;
+    QPainterState *s = state();
+    float det = s->matrix.determinant();
+
+    // don't try to cache huge fonts or vastly transformed fonts
+    QFontEngine *fontEngine = textItem->fontEngine();
+    const qreal pixelSize = fontEngine->fontDef.pixelSize;
+    if (pixelSize * pixelSize * qAbs(det) < QT_MAX_CACHED_GLYPH_SIZE * QT_MAX_CACHED_GLYPH_SIZE ||
+        det < 0.25f || det > 4.f) {
+        QFontEngineGlyphCache::Type glyphType = fontEngine->glyphFormat >= 0
+                                                ? QFontEngineGlyphCache::Type(textItem->fontEngine()->glyphFormat)
+                                                : d->glyphCacheType;
+        if (glyphType == QFontEngineGlyphCache::Raster_RGBMask) {
+            if (d->device->alphaRequested() || s->matrix.type() > QTransform::TxTranslate
+                || (s->composition_mode != QPainter::CompositionMode_Source
+                && s->composition_mode != QPainter::CompositionMode_SourceOver))
+            {
+                glyphType = QFontEngineGlyphCache::Raster_A8;
+            }
         }
-    }
 
-    d->drawCachedGlyphs(glyphType, textItem);
+        d->drawCachedGlyphs(glyphType, textItem);
+    } else {
+        QPaintEngineEx::drawStaticTextItem(textItem);
+    }
 }
 
 bool QGL2PaintEngineEx::drawTexture(const QRectF &dest, GLuint textureId, const QSize &size, const QRectF &src)