19 files changed, 116 insertions, 109 deletions

diff --git a/src/gui/opengl/qopengl.h b/src/gui/opengl/qopengl.h
index 9d29e07319..a4a626a0c4 100644
--- a/src/gui/opengl/qopengl.h
+++ b/src/gui/opengl/qopengl.h
@@ -46,8 +46,6 @@
 
 #include <QtCore/qglobal.h>
 
-QT_BEGIN_HEADER
-
 #if defined(QT_OPENGL_ES_2)
 # if defined(Q_OS_MAC)
 #  include <OpenGLES/ES2/gl.h>
@@ -113,8 +111,6 @@ QT_BEGIN_NAMESPACE
 
 QT_END_NAMESPACE
 
-QT_END_HEADER
-
 #endif // QT_NO_OPENGL
 
 #endif // QOPENGL_H
diff --git a/src/gui/opengl/qopengl_p.h b/src/gui/opengl/qopengl_p.h
index 84245fb670..3cf636751a 100644
--- a/src/gui/opengl/qopengl_p.h
+++ b/src/gui/opengl/qopengl_p.h
@@ -46,11 +46,9 @@
 #include <private/qopenglcontext_p.h>
 #include <QtCore/qset.h>
 
-QT_BEGIN_HEADER
-
 QT_BEGIN_NAMESPACE
 
-class QOpenGLExtensionMatcher
+class Q_GUI_EXPORT QOpenGLExtensionMatcher
 {
 public:
     QOpenGLExtensionMatcher();
@@ -68,6 +66,4 @@ private:
 
 QT_END_NAMESPACE
 
-QT_END_HEADER
-
 #endif // QOPENGL_H
diff --git a/src/gui/opengl/qopenglbuffer.h b/src/gui/opengl/qopenglbuffer.h
index 5ce8c3db49..014060086d 100644
--- a/src/gui/opengl/qopenglbuffer.h
+++ b/src/gui/opengl/qopenglbuffer.h
@@ -47,8 +47,6 @@
 #include <QtCore/qscopedpointer.h>
 #include <QtGui/qopengl.h>
 
-QT_BEGIN_HEADER
-
 QT_BEGIN_NAMESPACE
 
 
@@ -128,8 +126,6 @@ private:
 
 QT_END_NAMESPACE
 
-QT_END_HEADER
-
 #endif // QT_NO_OPENGL
 
 #endif
diff --git a/src/gui/opengl/qopenglcustomshaderstage_p.h b/src/gui/opengl/qopenglcustomshaderstage_p.h
index 2accb03fa3..bb671b0d3b 100644
--- a/src/gui/opengl/qopenglcustomshaderstage_p.h
+++ b/src/gui/opengl/qopenglcustomshaderstage_p.h
@@ -55,8 +55,6 @@
 
 #include <QOpenGLShaderProgram>
 
-QT_BEGIN_HEADER
-
 QT_BEGIN_NAMESPACE
 
 
@@ -87,7 +85,5 @@ private:
 
 QT_END_NAMESPACE
 
-QT_END_HEADER
-
 
 #endif
diff --git a/src/gui/opengl/qopenglengineshadermanager_p.h b/src/gui/opengl/qopenglengineshadermanager_p.h
index 462ffbf703..49c03a7fee 100644
--- a/src/gui/opengl/qopenglengineshadermanager_p.h
+++ b/src/gui/opengl/qopenglengineshadermanager_p.h
@@ -228,8 +228,6 @@
 #include <private/qopenglcontext_p.h>
 #include <private/qopenglcustomshaderstage_p.h>
 
-QT_BEGIN_HEADER
-
 QT_BEGIN_NAMESPACE
 
 
@@ -508,6 +506,4 @@ private:
 
 QT_END_NAMESPACE
 
-QT_END_HEADER
-
 #endif //QOPENGLENGINE_SHADER_MANAGER_H
diff --git a/src/gui/opengl/qopenglengineshadersource_p.h b/src/gui/opengl/qopenglengineshadersource_p.h
index f1b1dbe5a6..869bd057f2 100644
--- a/src/gui/opengl/qopenglengineshadersource_p.h
+++ b/src/gui/opengl/qopenglengineshadersource_p.h
@@ -56,8 +56,6 @@
 
 #include "qopenglengineshadermanager_p.h"
 
-QT_BEGIN_HEADER
-
 QT_BEGIN_NAMESPACE
 
 
@@ -523,6 +521,4 @@ static const char* const qopenglslRgbMaskFragmentShaderPass2 = "\n\
 
 QT_END_NAMESPACE
 
-QT_END_HEADER
-
 #endif // GLGC_SHADER_SOURCE_H
diff --git a/src/gui/opengl/qopenglextensions_p.h b/src/gui/opengl/qopenglextensions_p.h
index a4e473c049..265771ce1b 100644
--- a/src/gui/opengl/qopenglextensions_p.h
+++ b/src/gui/opengl/qopenglextensions_p.h
@@ -55,8 +55,6 @@
 
 #include "qopenglfunctions.h"
 
-QT_BEGIN_HEADER
-
 QT_BEGIN_NAMESPACE
 
 
@@ -193,6 +191,4 @@ inline void QOpenGLExtensions::glGetBufferSubData(GLenum target, qopengl_GLintpt
 
 QT_END_NAMESPACE
 
-QT_END_HEADER
-
 #endif // QOPENGL_EXTENSIONS_P_H
diff --git a/src/gui/opengl/qopenglframebufferobject.h b/src/gui/opengl/qopenglframebufferobject.h
index 9dbef318f0..e4fd7c8e95 100644
--- a/src/gui/opengl/qopenglframebufferobject.h
+++ b/src/gui/opengl/qopenglframebufferobject.h
@@ -49,8 +49,6 @@
 
 #include <QtCore/qscopedpointer.h>
 
-QT_BEGIN_HEADER
-
 QT_BEGIN_NAMESPACE
 
 
@@ -161,8 +159,6 @@ private:
 
 QT_END_NAMESPACE
 
-QT_END_HEADER
-
 #endif // QT_NO_OPENGL
 
 #endif // QOPENGLFRAMEBUFFEROBJECT_H
diff --git a/src/gui/opengl/qopenglfunctions.cpp b/src/gui/opengl/qopenglfunctions.cpp
index ee5855d866..3737df7497 100644
--- a/src/gui/opengl/qopenglfunctions.cpp
+++ b/src/gui/opengl/qopenglfunctions.cpp
@@ -289,7 +289,7 @@ static int qt_gl_resolve_features()
     return features;
 #else
     int features = 0;
-    //QOpenGLFormat::OpenGLVersionFlags versions = QOpenGLFormat::openGLVersionFlags();
+    QSurfaceFormat format = QOpenGLContext::currentContext()->format();
     QOpenGLExtensionMatcher extensions;
 
     // Recognize features by extension name.
@@ -327,6 +327,10 @@ static int qt_gl_resolve_features()
                 QOpenGLFunctions::StencilSeparate |
                 QOpenGLFunctions::BlendEquationSeparate |
                 QOpenGLFunctions::NPOTTextures;
+
+    if (format.majorVersion() >= 3)
+        features |= QOpenGLFunctions::Framebuffers;
+
     return features;
 #endif
 }
@@ -349,10 +353,13 @@ static int qt_gl_resolve_extensions()
         extensions |= QOpenGLExtensions::BGRATextureFormat;
 
 #else
+    QSurfaceFormat format = QOpenGLContext::currentContext()->format();
     extensions |= QOpenGLExtensions::ElementIndexUint | QOpenGLExtensions::MapBuffer;
 
     // Recognize features by extension name.
-    if (extensionMatcher.match("GL_ARB_framebuffer_object")) {
+    if (format.majorVersion() >= 3
+        || extensionMatcher.match("GL_ARB_framebuffer_object"))
+    {
         extensions |= QOpenGLExtensions::FramebufferMultisample |
                       QOpenGLExtensions::FramebufferBlit |
                       QOpenGLExtensions::PackedDepthStencil;
diff --git a/src/gui/opengl/qopenglfunctions.h b/src/gui/opengl/qopenglfunctions.h
index 5f3b63d0a0..100e3751be 100644
--- a/src/gui/opengl/qopenglfunctions.h
+++ b/src/gui/opengl/qopenglfunctions.h
@@ -71,8 +71,6 @@
 #define Q_OPENGL_FUNCTIONS_DEBUG
 #endif
 
-QT_BEGIN_HEADER
-
 QT_BEGIN_NAMESPACE
 
 
@@ -1520,8 +1518,6 @@ inline void QOpenGLFunctions::glVertexAttribPointer(GLuint indx, GLint size, GLe
 
 QT_END_NAMESPACE
 
-QT_END_HEADER
-
 #endif // QT_NO_OPENGL
 
 #endif
diff --git a/src/gui/opengl/qopenglpaintdevice.h b/src/gui/opengl/qopenglpaintdevice.h
index 66850c73fc..731000f131 100644
--- a/src/gui/opengl/qopenglpaintdevice.h
+++ b/src/gui/opengl/qopenglpaintdevice.h
@@ -48,8 +48,6 @@
 #include <QtGui/qopengl.h>
 #include <QtGui/qopenglcontext.h>
 
-QT_BEGIN_HEADER
-
 QT_BEGIN_NAMESPACE
 
 
@@ -91,8 +89,6 @@ protected:
 
 QT_END_NAMESPACE
 
-QT_END_HEADER
-
 #endif // QT_NO_OPENGL
 
 #endif // QOPENGLPAINTDEVICE_H
diff --git a/src/gui/opengl/qopenglpaintengine.cpp b/src/gui/opengl/qopenglpaintengine.cpp
index 9fd8a7ada7..555c47f265 100644
--- a/src/gui/opengl/qopenglpaintengine.cpp
+++ b/src/gui/opengl/qopenglpaintengine.cpp
@@ -624,7 +624,7 @@ void QOpenGL2PaintEngineExPrivate::transferMode(EngineMode newMode)
     if (newMode == mode)
         return;
 
-    if (mode == TextDrawingMode || mode == ImageDrawingMode || mode == ImageArrayDrawingMode) {
+    if (mode != BrushDrawingMode) {
         lastTextureUsed = GLuint(-1);
     }
 
@@ -639,10 +639,12 @@ void QOpenGL2PaintEngineExPrivate::transferMode(EngineMode newMode)
         setVertexAttributePointer(QT_TEXTURE_COORDS_ATTR, staticTextureCoordinateArray);
     }
 
-    if (newMode == ImageArrayDrawingMode) {
+    if (newMode == ImageArrayDrawingMode || newMode == ImageOpacityArrayDrawingMode) {
         setVertexAttributePointer(QT_VERTEX_COORDS_ATTR, (GLfloat*)vertexCoordinateArray.data());
         setVertexAttributePointer(QT_TEXTURE_COORDS_ATTR, (GLfloat*)textureCoordinateArray.data());
-        setVertexAttributePointer(QT_OPACITY_ATTR, (GLfloat*)opacityArray.data());
+
+        if (newMode == ImageOpacityArrayDrawingMode)
+            setVertexAttributePointer(QT_OPACITY_ATTR, (GLfloat*)opacityArray.data());
     }
 
     // This needs to change when we implement high-quality anti-aliasing...
@@ -1069,9 +1071,23 @@ void QOpenGL2PaintEngineExPrivate::resetClipIfNeeded()
     glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
 }
 
+bool QOpenGL2PaintEngineExPrivate::prepareForCachedGlyphDraw(const QFontEngineGlyphCache &cache)
+{
+    Q_Q(QOpenGL2PaintEngineEx);
+
+    Q_ASSERT(cache.transform().type() <= QTransform::TxScale);
+
+    QTransform &transform = q->state()->matrix;
+    transform.scale(1.0 / cache.transform().m11(), 1.0 / cache.transform().m22());
+    bool ret = prepareForDraw(false);
+    transform.scale(cache.transform().m11(), cache.transform().m22());
+
+    return ret;
+}
+
 bool QOpenGL2PaintEngineExPrivate::prepareForDraw(bool srcPixelsAreOpaque)
 {
-    if (brushTextureDirty && mode != ImageDrawingMode && mode != ImageArrayDrawingMode)
+    if (brushTextureDirty && (mode == TextDrawingMode || mode == BrushDrawingMode))
         updateBrushTexture();
 
     if (compositionModeDirty)
@@ -1091,12 +1107,12 @@ bool QOpenGL2PaintEngineExPrivate::prepareForDraw(bool srcPixelsAreOpaque)
     }
 
     QOpenGLEngineShaderManager::OpacityMode opacityMode;
-    if (mode == ImageArrayDrawingMode) {
+    if (mode == ImageOpacityArrayDrawingMode) {
         opacityMode = QOpenGLEngineShaderManager::AttributeOpacity;
     } else {
         opacityMode = stateHasOpacity ? QOpenGLEngineShaderManager::UniformOpacity
                                       : QOpenGLEngineShaderManager::NoOpacity;
-        if (stateHasOpacity && (mode != ImageDrawingMode)) {
+        if (stateHasOpacity && (mode != ImageDrawingMode && mode != ImageArrayDrawingMode)) {
             // Using a brush
             bool brushIsPattern = (currentBrush.style() >= Qt::Dense1Pattern) &&
                                   (currentBrush.style() <= Qt::DiagCrossPattern);
@@ -1116,7 +1132,7 @@ bool QOpenGL2PaintEngineExPrivate::prepareForDraw(bool srcPixelsAreOpaque)
         matrixUniformDirty = true;
     }
 
-    if (brushUniformsDirty && mode != ImageDrawingMode && mode != ImageArrayDrawingMode)
+    if (brushUniformsDirty && (mode == TextDrawingMode || mode == BrushDrawingMode))
         updateBrushUniforms();
 
     if (opacityMode == QOpenGLEngineShaderManager::UniformOpacity && opacityUniformDirty) {
@@ -1407,11 +1423,9 @@ void QOpenGL2PaintEngineEx::drawStaticTextItem(QStaticTextItem *textItem)
     ensureActive();
 
     QPainterState *s = state();
-    float det = s->matrix.determinant();
 
-    // don't try to cache huge fonts or vastly transformed fonts
     QFontEngine *fontEngine = textItem->fontEngine();
-    if (shouldDrawCachedGlyphs(fontEngine, s->matrix) && det >= 0.25f && det <= 4.f) {
+    if (shouldDrawCachedGlyphs(fontEngine, s->matrix)) {
         QFontEngineGlyphCache::Type glyphType = fontEngine->glyphFormat >= 0
                                                 ? QFontEngineGlyphCache::Type(textItem->fontEngine()->glyphFormat)
                                                 : d->glyphCacheType;
@@ -1461,13 +1475,6 @@ void QOpenGL2PaintEngineEx::drawTextItem(const QPointF &p, const QTextItem &text
 
     QTransform::TransformationType txtype = s->matrix.type();
 
-    float det = s->matrix.determinant();
-    bool drawCached = txtype < QTransform::TxProject;
-
-    // don't try to cache huge fonts or vastly transformed fonts
-    if (!shouldDrawCachedGlyphs(ti.fontEngine, s->matrix) || det < 0.25f || det > 4.f)
-        drawCached = false;
-
     QFontEngineGlyphCache::Type glyphType = ti.fontEngine->glyphFormat >= 0
                                             ? QFontEngineGlyphCache::Type(ti.fontEngine->glyphFormat)
                                             : d->glyphCacheType;
@@ -1482,7 +1489,7 @@ void QOpenGL2PaintEngineEx::drawTextItem(const QPointF &p, const QTextItem &text
         }
     }
 
-    if (drawCached) {
+    if (shouldDrawCachedGlyphs(ti.fontEngine, s->matrix)) {
         QVarLengthArray<QFixedPoint> positions;
         QVarLengthArray<glyph_t> glyphs;
         QTransform matrix = QTransform::fromTranslate(p.x(), p.y());
@@ -1531,6 +1538,12 @@ namespace {
 
 // #define QT_OPENGL_DRAWCACHEDGLYPHS_INDEX_ARRAY_VBO
 
+bool QOpenGL2PaintEngineEx::shouldDrawCachedGlyphs(QFontEngine *fontEngine, const QTransform &t) const
+{
+    // Don't try to cache vastly transformed fonts
+    return t.type() < QTransform::TxProject && QPaintEngineEx::shouldDrawCachedGlyphs(fontEngine, t);
+}
+
 void QOpenGL2PaintEngineExPrivate::drawCachedGlyphs(QFontEngineGlyphCache::Type glyphType,
                                                 QStaticTextItem *staticTextItem)
 {
@@ -1542,10 +1555,18 @@ void QOpenGL2PaintEngineExPrivate::drawCachedGlyphs(QFontEngineGlyphCache::Type
     bool recreateVertexArrays = false;
     QFontEngine *fe = staticTextItem->fontEngine();
 
+    // We allow scaling, so that the glyph-cache will contain glyphs with the
+    // appropriate resolution in the case of displays with a device-pixel-ratio != 1.
+    QTransform transform = s->matrix.type() < QTransform::TxRotate ?
+        QTransform::fromScale(qAbs(s->matrix.m11()), qAbs(s->matrix.m22())) :
+        QTransform::fromScale(
+            QVector2D(s->matrix.m11(), s->matrix.m12()).length(),
+            QVector2D(s->matrix.m21(), s->matrix.m22()).length());
+
     QOpenGLTextureGlyphCache *cache =
-            (QOpenGLTextureGlyphCache *) fe->glyphCache(cacheKey, glyphType, QTransform());
+            (QOpenGLTextureGlyphCache *) fe->glyphCache(cacheKey, glyphType, transform);
     if (!cache || cache->cacheType() != glyphType || cache->contextGroup() == 0) {
-        cache = new QOpenGLTextureGlyphCache(glyphType, QTransform());
+        cache = new QOpenGLTextureGlyphCache(glyphType, transform);
         fe->setGlyphCache(cacheKey, cache);
         recreateVertexArrays = true;
     }
@@ -1583,7 +1604,10 @@ void QOpenGL2PaintEngineExPrivate::drawCachedGlyphs(QFontEngineGlyphCache::Type
     if (cache->width() == 0 || cache->height() == 0)
         return;
 
-    transferMode(TextDrawingMode);
+    if (glyphType == QFontEngineGlyphCache::Raster_ARGB)
+        transferMode(ImageArrayDrawingMode);
+    else
+        transferMode(TextDrawingMode);
 
     int margin = fe->glyphMargin(glyphType);
 
@@ -1637,8 +1661,8 @@ void QOpenGL2PaintEngineExPrivate::drawCachedGlyphs(QFontEngineGlyphCache::Type
             if (c.isNull())
                 continue;
 
-            int x = qFloor(staticTextItem->glyphPositions[i].x) + c.baseLineX - margin;
-            int y = qRound(staticTextItem->glyphPositions[i].y) - c.baseLineY - margin;
+            int x = qFloor(staticTextItem->glyphPositions[i].x.toReal() * cache->transform().m11()) + c.baseLineX - margin;
+            int y = qRound(staticTextItem->glyphPositions[i].y.toReal() * cache->transform().m22()) - c.baseLineY - margin;
 
             vertexCoordinates->addQuad(QRectF(x, y, c.w, c.h));
             textureCoordinates->addQuad(QRectF(c.x*dx, c.y*dy, c.w * dx, c.h * dy));
@@ -1679,8 +1703,10 @@ void QOpenGL2PaintEngineExPrivate::drawCachedGlyphs(QFontEngineGlyphCache::Type
 #endif
     }
 
-    setVertexAttributePointer(QT_VERTEX_COORDS_ATTR, (GLfloat*)vertexCoordinates->data());
-    setVertexAttributePointer(QT_TEXTURE_COORDS_ATTR, (GLfloat*)textureCoordinates->data());
+    if (glyphType != QFontEngineGlyphCache::Raster_ARGB || recreateVertexArrays) {
+        setVertexAttributePointer(QT_VERTEX_COORDS_ATTR, (GLfloat*)vertexCoordinates->data());
+        setVertexAttributePointer(QT_TEXTURE_COORDS_ATTR, (GLfloat*)textureCoordinates->data());
+    }
 
     if (!snapToPixelGrid) {
         snapToPixelGrid = true;
@@ -1711,9 +1737,9 @@ void QOpenGL2PaintEngineExPrivate::drawCachedGlyphs(QFontEngineGlyphCache::Type
             }
 
             compositionModeDirty = false; // I can handle this myself, thank you very much
-            prepareForDraw(false); // Text always causes src pixels to be transparent
+            prepareForCachedGlyphDraw(*cache);
 
-            // prepareForDraw() have set the opacity on the current shader, so the opacity state can now be reset.
+            // prepareForCachedGlyphDraw() have set the opacity on the current shader, so the opacity state can now be reset.
             if (compMode == QPainter::CompositionMode_Source) {
                 q->state()->opacity = oldOpacity;
                 opacityUniformDirty = true;
@@ -1734,7 +1760,7 @@ void QOpenGL2PaintEngineExPrivate::drawCachedGlyphs(QFontEngineGlyphCache::Type
             }
 
             compositionModeDirty = false; // I can handle this myself, thank you very much
-            prepareForDraw(false); // Text always causes src pixels to be transparent
+            prepareForCachedGlyphDraw(*cache);
             glEnable(GL_BLEND);
             glBlendFunc(GL_ZERO, GL_ONE_MINUS_SRC_COLOR);
 
@@ -1758,22 +1784,31 @@ void QOpenGL2PaintEngineExPrivate::drawCachedGlyphs(QFontEngineGlyphCache::Type
             }
 
             compositionModeDirty = false;
-            prepareForDraw(false); // Text always causes src pixels to be transparent
+            prepareForCachedGlyphDraw(*cache);
             glEnable(GL_BLEND);
             glBlendFunc(GL_ONE, GL_ONE);
         }
         compositionModeDirty = true;
+    } else if (glyphType == QFontEngineGlyphCache::Raster_ARGB) {
+        currentBrush = noBrush;
+        shaderManager->setSrcPixelType(QOpenGLEngineShaderManager::ImageSrc);
+        if (prepareForCachedGlyphDraw(*cache))
+            shaderManager->currentProgram()->setUniformValue(location(QOpenGLEngineShaderManager::ImageTexture), QT_IMAGE_TEXTURE_UNIT);
     } else {
         // Greyscale/mono glyphs
 
         shaderManager->setMaskType(QOpenGLEngineShaderManager::PixelMask);
-        prepareForDraw(false); // Text always causes src pixels to be transparent
+        prepareForCachedGlyphDraw(*cache);
     }
 
     QOpenGLTextureGlyphCache::FilterMode filterMode = (s->matrix.type() > QTransform::TxTranslate)?QOpenGLTextureGlyphCache::Linear:QOpenGLTextureGlyphCache::Nearest;
     if (lastMaskTextureUsed != cache->texture() || cache->filterMode() != filterMode) {
 
-        funcs.glActiveTexture(GL_TEXTURE0 + QT_MASK_TEXTURE_UNIT);
+        if (glyphType == QFontEngineGlyphCache::Raster_ARGB)
+            funcs.glActiveTexture(GL_TEXTURE0 + QT_IMAGE_TEXTURE_UNIT);
+        else
+            funcs.glActiveTexture(GL_TEXTURE0 + QT_MASK_TEXTURE_UNIT);
+
         if (lastMaskTextureUsed != cache->texture()) {
             glBindTexture(GL_TEXTURE_2D, cache->texture());
             lastMaskTextureUsed = cache->texture();
@@ -1889,7 +1924,7 @@ void QOpenGL2PaintEngineExPrivate::drawPixmapFragments(const QPainter::PixmapFra
 
     funcs.glActiveTexture(GL_TEXTURE0 + QT_IMAGE_TEXTURE_UNIT);
     GLuint id = QOpenGLTextureCache::cacheForContext(ctx)->bindTexture(ctx, pixmap);
-    transferMode(ImageArrayDrawingMode);
+    transferMode(ImageOpacityArrayDrawingMode);
 
     bool isBitmap = pixmap.isQBitmap();
     bool isOpaque = !isBitmap && (!pixmap.hasAlpha() || (hints & QPainter::OpaqueHint)) && allOpaque;
diff --git a/src/gui/opengl/qopenglpaintengine_p.h b/src/gui/opengl/qopenglpaintengine_p.h
index 93e1b4232e..d51f0e5256 100644
--- a/src/gui/opengl/qopenglpaintengine_p.h
+++ b/src/gui/opengl/qopenglpaintengine_p.h
@@ -70,7 +70,8 @@ enum EngineMode {
     ImageDrawingMode,
     TextDrawingMode,
     BrushDrawingMode,
-    ImageArrayDrawingMode
+    ImageArrayDrawingMode,
+    ImageOpacityArrayDrawingMode
 };
 
 QT_BEGIN_NAMESPACE
@@ -157,7 +158,8 @@ public:
     void setRenderTextActive(bool);
 
     bool isNativePaintingActive() const;
-    bool supportsTransformations(QFontEngine *, const QTransform &) const { return true; }
+    bool requiresPretransformedGlyphPositions(QFontEngine *, const QTransform &) const { return false; }
+    bool shouldDrawCachedGlyphs(QFontEngine *, const QTransform &) const;
 
 private:
     Q_DISABLE_COPY(QOpenGL2PaintEngineEx)
@@ -235,6 +237,7 @@ public:
     void setBrush(const QBrush& brush);
     void transferMode(EngineMode newMode);
     bool prepareForDraw(bool srcPixelsAreOpaque); // returns true if the program has changed
+    bool prepareForCachedGlyphDraw(const QFontEngineGlyphCache &cache);
     inline void useSimpleShader();
     inline GLuint location(const QOpenGLEngineShaderManager::Uniform uniform) {
         return shaderManager->getUniformLocation(uniform);
diff --git a/src/gui/opengl/qopenglshadercache_meego_p.h b/src/gui/opengl/qopenglshadercache_meego_p.h
index 3d62d79ee7..d1c14150d1 100644
--- a/src/gui/opengl/qopenglshadercache_meego_p.h
+++ b/src/gui/opengl/qopenglshadercache_meego_p.h
@@ -68,8 +68,6 @@
 #  include <syslog.h>
 #endif
 
-QT_BEGIN_HEADER
-
 /*
     This cache stores internal Qt shader programs in shared memory.
 
@@ -450,7 +448,5 @@ QT_END_NAMESPACE
 
 #endif
 
-QT_END_HEADER
-
 #endif
 #endif
diff --git a/src/gui/opengl/qopenglshadercache_p.h b/src/gui/opengl/qopenglshadercache_p.h
index 0e0b6c3735..17305539df 100644
--- a/src/gui/opengl/qopenglshadercache_p.h
+++ b/src/gui/opengl/qopenglshadercache_p.h
@@ -59,8 +59,6 @@
 #  include "qopenglshadercache_meego_p.h"
 #else
 
-QT_BEGIN_HEADER
-
 QT_BEGIN_NAMESPACE
 
 
@@ -91,7 +89,5 @@ public:
 
 QT_END_NAMESPACE
 
-QT_END_HEADER
-
 #endif
 #endif
diff --git a/src/gui/opengl/qopenglshaderprogram.h b/src/gui/opengl/qopenglshaderprogram.h
index cd05d0f96b..f371326239 100644
--- a/src/gui/opengl/qopenglshaderprogram.h
+++ b/src/gui/opengl/qopenglshaderprogram.h
@@ -50,8 +50,6 @@
 #include <QtGui/qvector4d.h>
 #include <QtGui/qmatrix4x4.h>
 
-QT_BEGIN_HEADER
-
 QT_BEGIN_NAMESPACE
 
 
@@ -293,8 +291,6 @@ private:
 
 QT_END_NAMESPACE
 
-QT_END_HEADER
-
 #endif // QT_NO_OPENGL
 
 #endif
diff --git a/src/gui/opengl/qopengltexturecache.cpp b/src/gui/opengl/qopengltexturecache.cpp
index fffc3688e3..94b82885ff 100644
--- a/src/gui/opengl/qopengltexturecache.cpp
+++ b/src/gui/opengl/qopengltexturecache.cpp
@@ -95,9 +95,10 @@ void QOpenGLTextureCacheWrapper::cleanupTexturesForPixmapData(QPlatformPixmap *p
     cleanupTexturesForCacheKey(pmd->cacheKey());
 }
 
-QOpenGLTextureCache::QOpenGLTextureCache(QOpenGLContext *ctx)
+QOpenGLTextureCache::QOpenGLTextureCache(QOpenGLContext *ctx, bool useByteSwapImage)
     : QOpenGLSharedResource(ctx->shareGroup())
     , m_cache(64 * 1024) // 64 MB cache
+    , m_useByteSwapImage(useByteSwapImage)
 {
 }
 
@@ -180,7 +181,9 @@ GLuint QOpenGLTextureCache::bindTexture(QOpenGLContext *context, qint64 key, con
 
     QImage tx = image.convertToFormat(QImage::Format_ARGB32_Premultiplied);
 
-    qgl_byteSwapImage(tx);
+    // Performance could be improved by skipping qgl_byteSwapImage().
+    if (m_useByteSwapImage)
+        qgl_byteSwapImage(tx);
 
     glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, tx.width(), tx.height(), 0, GL_RGBA, GL_UNSIGNED_BYTE, const_cast<const QImage &>(tx).bits());
 
diff --git a/src/gui/opengl/qopengltexturecache_p.h b/src/gui/opengl/qopengltexturecache_p.h
index 2e82d5f373..d4d3f00069 100644
--- a/src/gui/opengl/qopengltexturecache_p.h
+++ b/src/gui/opengl/qopengltexturecache_p.h
@@ -78,7 +78,7 @@ class Q_GUI_EXPORT QOpenGLTextureCache : public QOpenGLSharedResource
 public:
     static QOpenGLTextureCache *cacheForContext(QOpenGLContext *context);
 
-    QOpenGLTextureCache(QOpenGLContext *);
+    QOpenGLTextureCache(QOpenGLContext *, bool useByteSwapImage = true);
     ~QOpenGLTextureCache();
 
     GLuint bindTexture(QOpenGLContext *context, const QPixmap &pixmap);
@@ -94,6 +94,7 @@ private:
 
     QMutex m_mutex;
     QCache<quint64, QOpenGLCachedTexture> m_cache;
+    bool m_useByteSwapImage;
 };
 
 QT_END_NAMESPACE
diff --git a/src/gui/opengl/qopengltextureglyphcache.cpp b/src/gui/opengl/qopengltextureglyphcache.cpp
index b751629117..83f407575e 100644
--- a/src/gui/opengl/qopengltextureglyphcache.cpp
+++ b/src/gui/opengl/qopengltextureglyphcache.cpp
@@ -120,7 +120,7 @@ void QOpenGLTextureGlyphCache::createTextureData(int width, int height)
     m_textureResource->m_width = width;
     m_textureResource->m_height = height;
 
-    if (m_type == QFontEngineGlyphCache::Raster_RGBMask) {
+    if (m_type == QFontEngineGlyphCache::Raster_RGBMask || m_type == QFontEngineGlyphCache::Raster_ARGB) {
         QVarLengthArray<uchar> data(width * height * 4);
         for (int i = 0; i < data.size(); ++i)
             data[i] = 0;
@@ -314,30 +314,40 @@ void QOpenGLTextureGlyphCache::fillTexture(const Coord &c, glyph_t glyph, QFixed
             for (int x = 0; x < maskWidth; ++x)
                 src[x] = -src[x]; // convert 0 and 1 into 0 and 255
         }
-    } else if (mask.format() == QImage::Format_RGB32) {
-        // Make the alpha component equal to the average of the RGB values.
-        // This is needed when drawing sub-pixel antialiased text on translucent targets.
-        for (int y = 0; y < maskHeight; ++y) {
-            quint32 *src = (quint32 *) mask.scanLine(y);
-            for (int x = 0; x < maskWidth; ++x) {
-                uchar r = src[x] >> 16;
-                uchar g = src[x] >> 8;
-                uchar b = src[x];
-                quint32 avg = (quint32(r) + quint32(g) + quint32(b) + 1) / 3; // "+1" for rounding.
+    } else if (mask.depth() == 32) {
+        if (mask.format() == QImage::Format_RGB32
+            // We need to make the alpha component equal to the average of the RGB values.
+            // This is needed when drawing sub-pixel antialiased text on translucent targets.
+#if defined(QT_OPENGL_ES_2)
+            || !hasBGRA // We need to reverse the bytes
+#endif
+            ) {
+            for (int y = 0; y < maskHeight; ++y) {
+                quint32 *src = (quint32 *) mask.scanLine(y);
+                for (int x = 0; x < maskWidth; ++x) {
+                    uchar r = src[x] >> 16;
+                    uchar g = src[x] >> 8;
+                    uchar b = src[x];
+                    quint32 avg;
+                    if (mask.format() == QImage::Format_RGB32)
+                        avg = (quint32(r) + quint32(g) + quint32(b) + 1) / 3; // "+1" for rounding.
+                    else // Format_ARGB_Premultiplied
+                        avg = src[x] >> 24;
 
 #if defined(QT_OPENGL_ES_2)
-                if (!hasBGRA) {
-                    // Reverse bytes to match GL_RGBA
-                    src[x] = (avg << 24) | (quint32(r) << 0) | (quint32(g) << 8) | (quint32(b) << 16);
-                } else
+                    if (!hasBGRA) {
+                        // Reverse bytes to match GL_RGBA
+                        src[x] = (avg << 24) | (quint32(r) << 0) | (quint32(g) << 8) | (quint32(b) << 16);
+                    } else
 #endif
-                    src[x] = (src[x] & 0x00ffffff) | (avg << 24);
+                        src[x] = (src[x] & 0x00ffffff) | (avg << 24);
+                }
             }
         }
     }
 
     glBindTexture(GL_TEXTURE_2D, m_textureResource->m_texture);
-    if (mask.format() == QImage::Format_RGB32) {
+    if (mask.depth() == 32) {
 #if defined(QT_OPENGL_ES_2)
         glTexSubImage2D(GL_TEXTURE_2D, 0, c.x, c.y, maskWidth, maskHeight, hasBGRA ? GL_BGRA_EXT : GL_RGBA, GL_UNSIGNED_BYTE, mask.bits());
 #else