Merge branch '4.6'

Conflicts:
	examples/webkit/fancybrowser/main.cpp
	src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp
	tools/assistant/tools/assistant/bookmarkmanager.cpp

16 files changed, 573 insertions, 822 deletions

diff --git a/src/opengl/gl2paintengineex/qglcustomshaderstage_p.h b/src/opengl/gl2paintengineex/qglcustomshaderstage_p.h
index e319389..e0033be 100644
--- a/src/opengl/gl2paintengineex/qglcustomshaderstage_p.h
+++ b/src/opengl/gl2paintengineex/qglcustomshaderstage_p.h
@@ -68,7 +68,7 @@ class Q_OPENGL_EXPORT QGLCustomShaderStage
 public:
     QGLCustomShaderStage();
     virtual ~QGLCustomShaderStage();
-    virtual void setUniforms(QGLShaderProgram*) = 0;
+    virtual void setUniforms(QGLShaderProgram*) {}
 
     void setUniformsDirty();
 
diff --git a/src/opengl/gl2paintengineex/qglengineshadermanager.cpp b/src/opengl/gl2paintengineex/qglengineshadermanager.cpp
index 8a8f483..9d545b9 100644
--- a/src/opengl/gl2paintengineex/qglengineshadermanager.cpp
+++ b/src/opengl/gl2paintengineex/qglengineshadermanager.cpp
@@ -170,13 +170,15 @@ QGLEngineSharedShaders::QGLEngineSharedShaders(const QGLContext* context)
     source.append(qShaderSnippets[MainVertexShader]);
     source.append(qShaderSnippets[PositionOnlyVertexShader]);
     vertexShader = new QGLShader(QGLShader::Vertex, context, this);
-    vertexShader->compileSourceCode(source);
+    if (!vertexShader->compileSourceCode(source))
+        qWarning("Vertex shader for simpleShaderProg (MainVertexShader & PositionOnlyVertexShader) failed to compile");
 
     source.clear();
     source.append(qShaderSnippets[MainFragmentShader]);
     source.append(qShaderSnippets[ShockingPinkSrcFragmentShader]);
     fragShader = new QGLShader(QGLShader::Fragment, context, this);
-    fragShader->compileSourceCode(source);
+    if (!fragShader->compileSourceCode(source))
+        qWarning("Fragment shader for simpleShaderProg (MainFragmentShader & ShockingPinkSrcFragmentShader) failed to compile");
 
     simpleShaderProg = new QGLShaderProgram(context, this);
     simpleShaderProg->addShader(vertexShader);
@@ -193,13 +195,15 @@ QGLEngineSharedShaders::QGLEngineSharedShaders(const QGLContext* context)
     source.append(qShaderSnippets[MainWithTexCoordsVertexShader]);
     source.append(qShaderSnippets[UntransformedPositionVertexShader]);
     vertexShader = new QGLShader(QGLShader::Vertex, context, this);
-    vertexShader->compileSourceCode(source);
+    if (!vertexShader->compileSourceCode(source))
+        qWarning("Vertex shader for blitShaderProg (MainWithTexCoordsVertexShader & UntransformedPositionVertexShader) failed to compile");
 
     source.clear();
     source.append(qShaderSnippets[MainFragmentShader]);
     source.append(qShaderSnippets[ImageSrcFragmentShader]);
     fragShader = new QGLShader(QGLShader::Fragment, context, this);
-    fragShader->compileSourceCode(source);
+    if (!fragShader->compileSourceCode(source))
+        qWarning("Fragment shader for blitShaderProg (MainFragmentShader & ImageSrcFragmentShader) failed to compile");
 
     blitShaderProg = new QGLShaderProgram(context, this);
     blitShaderProg->addShader(vertexShader);
@@ -234,84 +238,95 @@ QGLEngineShaderProg *QGLEngineSharedShaders::findProgramInCache(const QGLEngineS
         }
     }
 
-    QByteArray source;
-    source.append(qShaderSnippets[prog.mainFragShader]);
-    source.append(qShaderSnippets[prog.srcPixelFragShader]);
-    if (prog.srcPixelFragShader == CustomImageSrcFragmentShader)
-        source.append(prog.customStageSource);
-    if (prog.compositionFragShader)
-        source.append(qShaderSnippets[prog.compositionFragShader]);
-    if (prog.maskFragShader)
-        source.append(qShaderSnippets[prog.maskFragShader]);
-    QGLShader* fragShader = new QGLShader(QGLShader::Fragment, ctxGuard.context(), this);
-    fragShader->compileSourceCode(source);
-
-    source.clear();
-    source.append(qShaderSnippets[prog.mainVertexShader]);
-    source.append(qShaderSnippets[prog.positionVertexShader]);
-    QGLShader* vertexShader = new QGLShader(QGLShader::Vertex, ctxGuard.context(), this);
-    vertexShader->compileSourceCode(source);
+    QGLShader *vertexShader = 0;
+    QGLShader *fragShader = 0;
+    QGLEngineShaderProg *newProg = 0;
+    bool success = false;
+
+    do {
+        QByteArray source;
+        source.append(qShaderSnippets[prog.mainFragShader]);
+        source.append(qShaderSnippets[prog.srcPixelFragShader]);
+        if (prog.srcPixelFragShader == CustomImageSrcFragmentShader)
+            source.append(prog.customStageSource);
+        if (prog.compositionFragShader)
+            source.append(qShaderSnippets[prog.compositionFragShader]);
+        if (prog.maskFragShader)
+            source.append(qShaderSnippets[prog.maskFragShader]);
+        fragShader = new QGLShader(QGLShader::Fragment, ctxGuard.context(), this);
+        QByteArray description;
+#if defined(QT_DEBUG)
+        // Name the shader for easier debugging
+        description.append("Fragment shader: main=");
+        description.append(snippetNameStr(prog.mainFragShader));
+        description.append(", srcPixel=");
+        description.append(snippetNameStr(prog.srcPixelFragShader));
+        if (prog.compositionFragShader) {
+            description.append(", composition=");
+            description.append(snippetNameStr(prog.compositionFragShader));
+        }
+        if (prog.maskFragShader) {
+            description.append(", mask=");
+            description.append(snippetNameStr(prog.maskFragShader));
+        }
+        fragShader->setObjectName(QString::fromLatin1(description));
+#endif
+        if (!fragShader->compileSourceCode(source)) {
+            qWarning() << "Warning:" << description << "failed to compile!";
+            break;
+        }
 
+        source.clear();
+        source.append(qShaderSnippets[prog.mainVertexShader]);
+        source.append(qShaderSnippets[prog.positionVertexShader]);
+        vertexShader = new QGLShader(QGLShader::Vertex, ctxGuard.context(), this);
 #if defined(QT_DEBUG)
-    // Name the shaders for easier debugging
-    QByteArray description;
-    description.append("Fragment shader: main=");
-    description.append(snippetNameStr(prog.mainFragShader));
-    description.append(", srcPixel=");
-    description.append(snippetNameStr(prog.srcPixelFragShader));
-    if (prog.compositionFragShader) {
-        description.append(", composition=");
-        description.append(snippetNameStr(prog.compositionFragShader));
-    }
-    if (prog.maskFragShader) {
-        description.append(", mask=");
-        description.append(snippetNameStr(prog.maskFragShader));
-    }
-    fragShader->setObjectName(QString::fromLatin1(description));
-
-    description.clear();
-    description.append("Vertex shader: main=");
-    description.append(snippetNameStr(prog.mainVertexShader));
-    description.append(", position=");
-    description.append(snippetNameStr(prog.positionVertexShader));
-    vertexShader->setObjectName(QString::fromLatin1(description));
+        // Name the shader for easier debugging
+        description.clear();
+        description.append("Vertex shader: main=");
+        description.append(snippetNameStr(prog.mainVertexShader));
+        description.append(", position=");
+        description.append(snippetNameStr(prog.positionVertexShader));
+        vertexShader->setObjectName(QString::fromLatin1(description));
 #endif
+        if (!vertexShader->compileSourceCode(source)) {
+            qWarning() << "Warning:" << description << "failed to compile!";
+            break;
+        }
 
-    QGLEngineShaderProg* newProg = new QGLEngineShaderProg(prog);
-
-    // If the shader program's not found in the cache, create it now.
-    newProg->program = new QGLShaderProgram(ctxGuard.context(), this);
-    newProg->program->addShader(vertexShader);
-    newProg->program->addShader(fragShader);
-
-    // We have to bind the vertex attribute names before the program is linked:
-    newProg->program->bindAttributeLocation("vertexCoordsArray", QT_VERTEX_COORDS_ATTR);
-    if (newProg->useTextureCoords)
-        newProg->program->bindAttributeLocation("textureCoordArray", QT_TEXTURE_COORDS_ATTR);
-    if (newProg->useOpacityAttribute)
-        newProg->program->bindAttributeLocation("opacityArray", QT_OPACITY_ATTR);
-
-    newProg->program->link();
-    if (!newProg->program->isLinked()) {
-        QLatin1String none("none");
-        QLatin1String br("\n");
-        QString error;
-        error = QLatin1String("Shader program failed to link,")
+        newProg = new QGLEngineShaderProg(prog);
+
+        // If the shader program's not found in the cache, create it now.
+        newProg->program = new QGLShaderProgram(ctxGuard.context(), this);
+        newProg->program->addShader(vertexShader);
+        newProg->program->addShader(fragShader);
+
+        // We have to bind the vertex attribute names before the program is linked:
+        newProg->program->bindAttributeLocation("vertexCoordsArray", QT_VERTEX_COORDS_ATTR);
+        if (newProg->useTextureCoords)
+            newProg->program->bindAttributeLocation("textureCoordArray", QT_TEXTURE_COORDS_ATTR);
+        if (newProg->useOpacityAttribute)
+            newProg->program->bindAttributeLocation("opacityArray", QT_OPACITY_ATTR);
+
+        newProg->program->link();
+        if (!newProg->program->isLinked()) {
+            QLatin1String none("none");
+            QLatin1String br("\n");
+            QString error;
+            error = QLatin1String("Shader program failed to link,")
 #if defined(QT_DEBUG)
-            + br
-            + QLatin1String("  Shaders Used:") + br
-            + QLatin1String("    ") + vertexShader->objectName() + QLatin1String(": ") + br
-            + QLatin1String(vertexShader->sourceCode()) + br
-            + QLatin1String("    ") + fragShader->objectName() + QLatin1String(": ") + br
-            + QLatin1String(fragShader->sourceCode()) + br
+                + br
+                + QLatin1String("  Shaders Used:") + br
+                + QLatin1String("    ") + vertexShader->objectName() + QLatin1String(": ") + br
+                + QLatin1String(vertexShader->sourceCode()) + br
+                + QLatin1String("    ") + fragShader->objectName() + QLatin1String(": ") + br
+                + QLatin1String(fragShader->sourceCode()) + br
 #endif
-            + QLatin1String("  Error Log:\n")
-            + QLatin1String("    ") + newProg->program->log();
-        qWarning() << error;
-        delete newProg; // Deletes the QGLShaderProgram in it's destructor
-        newProg = 0;
-    }
-    else {
+                + QLatin1String("  Error Log:\n")
+                + QLatin1String("    ") + newProg->program->log();
+            qWarning() << error;
+            break;
+        }
         if (cachedPrograms.count() > 30) {
             // The cache is full, so delete the last 5 programs in the list.
             // These programs will be least used, as a program us bumped to
@@ -323,6 +338,22 @@ QGLEngineShaderProg *QGLEngineSharedShaders::findProgramInCache(const QGLEngineS
         }
 
         cachedPrograms.insert(0, newProg);
+
+        success = true;
+    } while (false);
+
+    // Clean up everything if we weren't successful
+    if (!success) {
+        if (newProg) {
+            delete newProg; // Also deletes the QGLShaderProgram which in turn deletes the QGLShaders
+            newProg = 0;
+        }
+        else {
+            if (vertexShader)
+                delete vertexShader;
+            if (fragShader)
+                delete fragShader;
+        }
     }
 
     return newProg;
@@ -364,6 +395,9 @@ QGLEngineShaderManager::~QGLEngineShaderManager()
 
 uint QGLEngineShaderManager::getUniformLocation(Uniform id)
 {
+    if (!currentShaderProg)
+        return 0;
+
     QVector<uint> &uniformLocations = currentShaderProg->uniformLocations;
     if (uniformLocations.isEmpty())
         uniformLocations.fill(GLuint(-1), NumUniforms);
@@ -406,6 +440,7 @@ void QGLEngineShaderManager::setDirty()
 
 void QGLEngineShaderManager::setSrcPixelType(Qt::BrushStyle style)
 {
+    Q_ASSERT(style != Qt::NoBrush);
     if (srcPixelType == PixelSrcType(style))
         return;
 
@@ -467,7 +502,10 @@ void QGLEngineShaderManager::removeCustomStage()
 
 QGLShaderProgram* QGLEngineShaderManager::currentProgram()
 {
-    return currentShaderProg->program;
+    if (currentShaderProg)
+        return currentShaderProg->program;
+    else
+        return simpleProgram();
 }
 
 QGLShaderProgram* QGLEngineShaderManager::simpleProgram()
diff --git a/src/opengl/gl2paintengineex/qglengineshadersource_p.h b/src/opengl/gl2paintengineex/qglengineshadersource_p.h
index 2407979..46de124 100644
--- a/src/opengl/gl2paintengineex/qglengineshadersource_p.h
+++ b/src/opengl/gl2paintengineex/qglengineshadersource_p.h
@@ -99,12 +99,15 @@ static const char* const qglslMainWithTexCoordsAndOpacityVertexShader = "\
             opacity = opacityArray; \
     }";
 
+// NOTE: We let GL do the perspective correction so texture lookups in the fragment
+//       shader are also perspective corrected.
 static const char* const qglslPositionOnlyVertexShader = "\
-    attribute highp vec4    vertexCoordsArray;\
-    uniform   highp mat4    pmvMatrix;\
+    attribute highp vec2    vertexCoordsArray;\
+    uniform   highp mat3    pmvMatrix;\
     void setPosition(void)\
     {\
-            gl_Position = pmvMatrix * vertexCoordsArray;\
+        vec3 transformedPos = pmvMatrix * vec3(vertexCoordsArray.xy, 1.0); \
+        gl_Position = vec4(transformedPos.xy, 0.0, transformedPos.z); \
     }";
 
 static const char* const qglslUntransformedPositionVertexShader = "\
@@ -116,20 +119,19 @@ static const char* const qglslUntransformedPositionVertexShader = "\
 
 // Pattern Brush - This assumes the texture size is 8x8 and thus, the inverted size is 0.125
 static const char* const qglslPositionWithPatternBrushVertexShader = "\
-    attribute highp   vec4  vertexCoordsArray; \
-    uniform   highp   mat4  pmvMatrix; \
+    attribute highp   vec2  vertexCoordsArray; \
+    uniform   highp   mat3  pmvMatrix; \
     uniform   mediump vec2  halfViewportSize; \
     uniform   highp   vec2  invertedTextureSize; \
     uniform   highp   mat3  brushTransform; \
     varying   highp   vec2  patternTexCoords; \
     void setPosition(void) { \
-            gl_Position = pmvMatrix * vertexCoordsArray;\
-            gl_Position.xy = gl_Position.xy / gl_Position.w; \
+            vec3 transformedPos = pmvMatrix * vec3(vertexCoordsArray.xy, 1.0); \
+            gl_Position.xy = transformedPos.xy / transformedPos.z; \
             mediump vec2 viewportCoords = (gl_Position.xy + 1.0) * halfViewportSize; \
-            mediump vec3 hTexCoords = brushTransform * vec3(viewportCoords, 1); \
+            mediump vec3 hTexCoords = brushTransform * vec3(viewportCoords, 1.0); \
             mediump float invertedHTexCoordsZ = 1.0 / hTexCoords.z; \
-            gl_Position.xy = gl_Position.xy * invertedHTexCoordsZ; \
-            gl_Position.w = invertedHTexCoordsZ; \
+            gl_Position = vec4(gl_Position.xy * invertedHTexCoordsZ, 0.0, invertedHTexCoordsZ); \
             patternTexCoords.xy = (hTexCoords.xy * 0.125) * invertedHTexCoordsZ; \
     }";
 
@@ -147,20 +149,19 @@ static const char* const qglslPatternBrushSrcFragmentShader = "\
 
 // Linear Gradient Brush
 static const char* const qglslPositionWithLinearGradientBrushVertexShader = "\
-    attribute highp   vec4  vertexCoordsArray; \
-    uniform   highp   mat4  pmvMatrix; \
+    attribute highp   vec2  vertexCoordsArray; \
+    uniform   highp   mat3  pmvMatrix; \
     uniform   mediump vec2  halfViewportSize; \
     uniform   highp   vec3  linearData; \
     uniform   highp   mat3  brushTransform; \
     varying   mediump float index; \
     void setPosition() { \
-        gl_Position = pmvMatrix * vertexCoordsArray;\
-        gl_Position.xy = gl_Position.xy / gl_Position.w; \
+        vec3 transformedPos = pmvMatrix * vec3(vertexCoordsArray.xy, 1.0); \
+        gl_Position.xy = transformedPos.xy / transformedPos.z; \
         mediump vec2 viewportCoords = (gl_Position.xy + 1.0) * halfViewportSize; \
         mediump vec3 hTexCoords = brushTransform * vec3(viewportCoords, 1); \
         mediump float invertedHTexCoordsZ = 1.0 / hTexCoords.z; \
-        gl_Position.xy = gl_Position.xy * invertedHTexCoordsZ; \
-        gl_Position.w = invertedHTexCoordsZ; \
+        gl_Position = vec4(gl_Position.xy * invertedHTexCoordsZ, 0.0, invertedHTexCoordsZ); \
         index = (dot(linearData.xy, hTexCoords.xy) * linearData.z) * invertedHTexCoordsZ; \
     }";
 
@@ -178,20 +179,19 @@ static const char* const qglslLinearGradientBrushSrcFragmentShader = "\
 
 // Conical Gradient Brush
 static const char* const qglslPositionWithConicalGradientBrushVertexShader = "\
-    attribute highp   vec4  vertexCoordsArray;\
-    uniform   highp   mat4  pmvMatrix;\
+    attribute highp   vec2  vertexCoordsArray;\
+    uniform   highp   mat3  pmvMatrix;\
     uniform   mediump vec2  halfViewportSize; \
     uniform   highp   mat3  brushTransform; \
     varying   highp   vec2  A; \
     void setPosition(void)\
     {\
-        gl_Position = pmvMatrix * vertexCoordsArray;\
-        gl_Position.xy = gl_Position.xy / gl_Position.w; \
+        vec3 transformedPos = pmvMatrix * vec3(vertexCoordsArray.xy, 1.0); \
+        gl_Position.xy = transformedPos.xy / transformedPos.z; \
         mediump vec2  viewportCoords = (gl_Position.xy + 1.0) * halfViewportSize; \
         mediump vec3 hTexCoords = brushTransform * vec3(viewportCoords, 1); \
         mediump float invertedHTexCoordsZ = 1.0 / hTexCoords.z; \
-        gl_Position.xy = gl_Position.xy * invertedHTexCoordsZ; \
-        gl_Position.w = invertedHTexCoordsZ; \
+        gl_Position = vec4(gl_Position.xy * invertedHTexCoordsZ, 0.0, invertedHTexCoordsZ); \
         A = hTexCoords.xy * invertedHTexCoordsZ; \
     }";
 
@@ -215,8 +215,8 @@ static const char* const qglslConicalGradientBrushSrcFragmentShader = "\n\
 
 // Radial Gradient Brush
 static const char* const qglslPositionWithRadialGradientBrushVertexShader = "\
-    attribute highp   vec4 vertexCoordsArray;\
-    uniform   highp   mat4 pmvMatrix;\
+    attribute highp   vec2 vertexCoordsArray;\
+    uniform   highp   mat3 pmvMatrix;\
     uniform   mediump vec2 halfViewportSize; \
     uniform   highp   mat3 brushTransform; \
     uniform   highp   vec2 fmp; \
@@ -224,13 +224,12 @@ static const char* const qglslPositionWithRadialGradientBrushVertexShader = "\
     varying   highp   vec2  A; \
     void setPosition(void) \
     {\
-        gl_Position = pmvMatrix * vertexCoordsArray;\
-        gl_Position.xy = gl_Position.xy / gl_Position.w; \
+        vec3 transformedPos = pmvMatrix * vec3(vertexCoordsArray.xy, 1.0); \
+        gl_Position.xy = transformedPos.xy / transformedPos.z; \
         mediump vec2 viewportCoords = (gl_Position.xy + 1.0) * halfViewportSize; \
         mediump vec3 hTexCoords = brushTransform * vec3(viewportCoords, 1); \
         mediump float invertedHTexCoordsZ = 1.0 / hTexCoords.z; \
-        gl_Position.xy = gl_Position.xy * invertedHTexCoordsZ; \
-        gl_Position.w = invertedHTexCoordsZ; \
+        gl_Position = vec4(gl_Position.xy * invertedHTexCoordsZ, 0.0, invertedHTexCoordsZ); \
         A = hTexCoords.xy * invertedHTexCoordsZ; \
         b = 2.0 * dot(A, fmp); \
     }";
@@ -253,20 +252,19 @@ static const char* const qglslRadialGradientBrushSrcFragmentShader = "\
 
 // Texture Brush
 static const char* const qglslPositionWithTextureBrushVertexShader = "\
-    attribute highp   vec4  vertexCoordsArray; \
-    uniform   highp   mat4  pmvMatrix; \
+    attribute highp   vec2 vertexCoordsArray; \
+    uniform   highp   mat3  pmvMatrix; \
     uniform   mediump vec2  halfViewportSize; \
     uniform   highp   vec2  invertedTextureSize; \
     uniform   highp   mat3  brushTransform; \
     varying   highp   vec2  textureCoords; \
     void setPosition(void) { \
-            gl_Position = pmvMatrix * vertexCoordsArray;\
-            gl_Position.xy = gl_Position.xy / gl_Position.w; \
+            vec3 transformedPos = pmvMatrix * vec3(vertexCoordsArray.xy, 1.0); \
+            gl_Position.xy = transformedPos.xy / transformedPos.z; \
             mediump vec2 viewportCoords = (gl_Position.xy + 1.0) * halfViewportSize; \
             mediump vec3 hTexCoords = brushTransform * vec3(viewportCoords, 1); \
             mediump float invertedHTexCoordsZ = 1.0 / hTexCoords.z; \
-            gl_Position.xy = gl_Position.xy * invertedHTexCoordsZ; \
-            gl_Position.w = invertedHTexCoordsZ; \
+            gl_Position = vec4(gl_Position.xy * invertedHTexCoordsZ, 0.0, invertedHTexCoordsZ); \
             textureCoords.xy = (hTexCoords.xy * invertedTextureSize) * gl_Position.w; \
     }";
 
diff --git a/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp b/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp
index f9c41b1..abe52fe 100644
--- a/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp
+++ b/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp
@@ -387,19 +387,25 @@ inline QColor qt_premultiplyColor(QColor c, GLfloat opacity)
 }
 
 
-void QGL2PaintEngineExPrivate::setBrush(const QBrush* brush)
+void QGL2PaintEngineExPrivate::setBrush(const QBrush& brush)
 {
+    Q_ASSERT(brush.style() != Qt::NoBrush);
+
+    if (qbrush_fast_equals(currentBrush, brush))
+        return;
+
     currentBrush = brush;
+
     brushTextureDirty = true;
     brushUniformsDirty = true;
-    if (currentBrush->style() == Qt::TexturePattern
-        && qHasPixmapTexture(*brush) && brush->texture().isQBitmap())
+    if (currentBrush.style() == Qt::TexturePattern
+        && qHasPixmapTexture(brush) && brush.texture().isQBitmap())
     {
         shaderManager->setSrcPixelType(QGLEngineShaderManager::TextureSrcWithPattern);
     } else {
-        shaderManager->setSrcPixelType(currentBrush->style());
+        shaderManager->setSrcPixelType(currentBrush.style());
     }
-    shaderManager->optimiseForBrushTransform(currentBrush->transform());
+    shaderManager->optimiseForBrushTransform(currentBrush.transform());
 }
 
 
@@ -421,7 +427,7 @@ void QGL2PaintEngineExPrivate::updateBrushTexture()
 {
     Q_Q(QGL2PaintEngineEx);
 //     qDebug("QGL2PaintEngineExPrivate::updateBrushTexture()");
-    Qt::BrushStyle style = currentBrush->style();
+    Qt::BrushStyle style = currentBrush.style();
 
     if ( (style >= Qt::Dense1Pattern) && (style <= Qt::DiagCrossPattern) ) {
         // Get the image data for the pattern
@@ -434,7 +440,7 @@ void QGL2PaintEngineExPrivate::updateBrushTexture()
     else if (style >= Qt::LinearGradientPattern && style <= Qt::ConicalGradientPattern) {
         // Gradiant brush: All the gradiants use the same texture
 
-        const QGradient* g = currentBrush->gradient();
+        const QGradient* g = currentBrush.gradient();
 
         // We apply global opacity in the fragment shaders, so we always pass 1.0
         // for opacity to the cache.
@@ -451,7 +457,7 @@ void QGL2PaintEngineExPrivate::updateBrushTexture()
             updateTextureFilter(GL_TEXTURE_2D, GL_CLAMP_TO_EDGE, q->state()->renderHints & QPainter::SmoothPixmapTransform);
     }
     else if (style == Qt::TexturePattern) {
-        const QPixmap& texPixmap = currentBrush->texture();
+        const QPixmap& texPixmap = currentBrush.texture();
 
         glActiveTexture(GL_TEXTURE0 + QT_BRUSH_TEXTURE_UNIT);
         QGLTexture *tex = ctx->d_func()->bindTexture(texPixmap, GL_TEXTURE_2D, GL_RGBA, QGLContext::InternalBindOption);
@@ -465,15 +471,15 @@ void QGL2PaintEngineExPrivate::updateBrushTexture()
 void QGL2PaintEngineExPrivate::updateBrushUniforms()
 {
 //     qDebug("QGL2PaintEngineExPrivate::updateBrushUniforms()");
-    Qt::BrushStyle style = currentBrush->style();
+    Qt::BrushStyle style = currentBrush.style();
 
     if (style == Qt::NoBrush)
         return;
 
-    QTransform brushQTransform = currentBrush->transform();
+    QTransform brushQTransform = currentBrush.transform();
 
     if (style == Qt::SolidPattern) {
-        QColor col = qt_premultiplyColor(currentBrush->color(), (GLfloat)q->state()->opacity);
+        QColor col = qt_premultiplyColor(currentBrush.color(), (GLfloat)q->state()->opacity);
         shaderManager->currentProgram()->setUniformValue(location(QGLEngineShaderManager::FragmentColor), col);
     }
     else {
@@ -481,7 +487,7 @@ void QGL2PaintEngineExPrivate::updateBrushUniforms()
         QPointF translationPoint;
 
         if (style <= Qt::DiagCrossPattern) {
-            QColor col = qt_premultiplyColor(currentBrush->color(), (GLfloat)q->state()->opacity);
+            QColor col = qt_premultiplyColor(currentBrush.color(), (GLfloat)q->state()->opacity);
 
             shaderManager->currentProgram()->setUniformValue(location(QGLEngineShaderManager::PatternColor), col);
 
@@ -489,7 +495,7 @@ void QGL2PaintEngineExPrivate::updateBrushUniforms()
             shaderManager->currentProgram()->setUniformValue(location(QGLEngineShaderManager::HalfViewportSize), halfViewportSize);
         }
         else if (style == Qt::LinearGradientPattern) {
-            const QLinearGradient *g = static_cast<const QLinearGradient *>(currentBrush->gradient());
+            const QLinearGradient *g = static_cast<const QLinearGradient *>(currentBrush.gradient());
 
             QPointF realStart = g->start();
             QPointF realFinal = g->finalStop();
@@ -509,7 +515,7 @@ void QGL2PaintEngineExPrivate::updateBrushUniforms()
             shaderManager->currentProgram()->setUniformValue(location(QGLEngineShaderManager::HalfViewportSize), halfViewportSize);
         }
         else if (style == Qt::ConicalGradientPattern) {
-            const QConicalGradient *g = static_cast<const QConicalGradient *>(currentBrush->gradient());
+            const QConicalGradient *g = static_cast<const QConicalGradient *>(currentBrush.gradient());
             translationPoint   = g->center();
 
             GLfloat angle = -(g->angle() * 2 * Q_PI) / 360.0;
@@ -520,7 +526,7 @@ void QGL2PaintEngineExPrivate::updateBrushUniforms()
             shaderManager->currentProgram()->setUniformValue(location(QGLEngineShaderManager::HalfViewportSize), halfViewportSize);
         }
         else if (style == Qt::RadialGradientPattern) {
-            const QRadialGradient *g = static_cast<const QRadialGradient *>(currentBrush->gradient());
+            const QRadialGradient *g = static_cast<const QRadialGradient *>(currentBrush.gradient());
             QPointF realCenter = g->center();
             QPointF realFocal  = g->focalPoint();
             qreal   realRadius = g->radius();
@@ -538,10 +544,10 @@ void QGL2PaintEngineExPrivate::updateBrushUniforms()
             shaderManager->currentProgram()->setUniformValue(location(QGLEngineShaderManager::HalfViewportSize), halfViewportSize);
         }
         else if (style == Qt::TexturePattern) {
-            const QPixmap& texPixmap = currentBrush->texture();
+            const QPixmap& texPixmap = currentBrush.texture();
 
-            if (qHasPixmapTexture(*currentBrush) && currentBrush->texture().isQBitmap()) {
-                QColor col = qt_premultiplyColor(currentBrush->color(), (GLfloat)q->state()->opacity);
+            if (qHasPixmapTexture(currentBrush) && currentBrush.texture().isQBitmap()) {
+                QColor col = qt_premultiplyColor(currentBrush.color(), (GLfloat)q->state()->opacity);
                 shaderManager->currentProgram()->setUniformValue(location(QGLEngineShaderManager::PatternColor), col);
             }
 
@@ -562,7 +568,7 @@ void QGL2PaintEngineExPrivate::updateBrushUniforms()
         QTransform gl_to_qt(1, 0, 0, -1, 0, height);
         QTransform inv_matrix;
         if (style == Qt::TexturePattern && textureInvertedY == -1)
-            inv_matrix = gl_to_qt * (QTransform(1, 0, 0, -1, 0, currentBrush->texture().height()) * brushQTransform * matrix).inverted() * translate;
+            inv_matrix = gl_to_qt * (QTransform(1, 0, 0, -1, 0, currentBrush.texture().height()) * brushQTransform * matrix).inverted() * translate;
         else
             inv_matrix = gl_to_qt * (brushQTransform * matrix).inverted() * translate;
 
@@ -578,37 +584,37 @@ void QGL2PaintEngineExPrivate::updateMatrix()
 {
 //     qDebug("QGL2PaintEngineExPrivate::updateMatrix()");
 
-    // We set up the 4x4 transformation matrix on the vertex shaders to
-    // be the equivalent of glOrtho(0, w, h, 0, -1, 1) * transform:
+    const QTransform& transform = q->state()->matrix;
+
+    // The projection matrix converts from Qt's coordinate system to GL's coordinate system
+    //    * GL's viewport is 2x2, Qt's is width x height
+    //    * GL has +y -> -y going from bottom -> top, Qt is the other way round
+    //    * GL has [0,0] in the center, Qt has it in the top-left
     //
-    // | 2/width     0     0 -1 |   | m11  m21  0   dx |
-    // |   0    -2/height  0  1 |   | m12  m22  0   dy |
-    // |   0         0    -1  0 | * |  0    0   1   0  |
-    // |   0         0     0  1 |   | m13  m23  0  m33 |
+    // This results in the Projection matrix below, which is multiplied by the painter's
+    // transformation matrix, as shown below:
     //
-    // We expand out the multiplication to save the cost of a full 4x4
-    // matrix multiplication as most of the components are trivial.
-    const QTransform& transform = q->state()->matrix;
+    //                Projection Matrix                      Painter Transform
+    // ------------------------------------------------   ------------------------
+    // | 2.0 / width  |      0.0      |     -1.0      |   |  m11  |  m21  |  dx  |
+    // |     0.0      | -2.0 / height |      1.0      | * |  m12  |  m22  |  dy  |
+    // |     0.0      |      0.0      |      1.0      |   |  m13  |  m23  |  m33 |
+    // ------------------------------------------------   ------------------------
+    //
+    // NOTE: The resultant matrix is also transposed, as GL expects column-major matracies
+
+    const GLfloat wfactor = 2.0f / width;
+    const GLfloat hfactor = -2.0f / height;
 
-    qreal wfactor = 2.0 / width;
-    qreal hfactor = -2.0 / height;
-
-    pmvMatrix[0][0] = wfactor * transform.m11() - transform.m13();
-    pmvMatrix[0][1] = hfactor * transform.m12() + transform.m13();
-    pmvMatrix[0][2] = 0.0;
-    pmvMatrix[0][3] = transform.m13();
-    pmvMatrix[1][0] = wfactor * transform.m21() - transform.m23();
-    pmvMatrix[1][1] = hfactor * transform.m22() + transform.m23();
-    pmvMatrix[1][2] = 0.0;
-    pmvMatrix[1][3] = transform.m23();
-    pmvMatrix[2][0] = 0.0;
-    pmvMatrix[2][1] = 0.0;
-    pmvMatrix[2][2] = -1.0;
-    pmvMatrix[2][3] = 0.0;
-    pmvMatrix[3][0] = wfactor * transform.dx() - transform.m33();
-    pmvMatrix[3][1] = hfactor * transform.dy() + transform.m33();
-    pmvMatrix[3][2] = 0.0;
-    pmvMatrix[3][3] = transform.m33();
+    pmvMatrix[0][0] = (wfactor * transform.m11())  - transform.m13();
+    pmvMatrix[1][0] = (wfactor * transform.m21())  - transform.m23();
+    pmvMatrix[2][0] = (wfactor * transform.dx() )  - transform.m33();
+    pmvMatrix[0][1] = (hfactor * transform.m12())  + transform.m13();
+    pmvMatrix[1][1] = (hfactor * transform.m22())  + transform.m23();
+    pmvMatrix[2][1] = (hfactor * transform.dy() )  + transform.m33();
+    pmvMatrix[0][2] = transform.m13();
+    pmvMatrix[1][2] = transform.m23();
+    pmvMatrix[2][2] = transform.m33();
 
     // 1/10000 == 0.0001, so we have good enough res to cover curves
     // that span the entire widget...
@@ -876,7 +882,7 @@ void QGL2PaintEngineExPrivate::fill(const QVectorPath& path)
     // Check to see if there's any hints
     if (path.shape() == QVectorPath::RectangleHint) {
         QGLRect rect(points[0].x(), points[0].y(), points[2].x(), points[2].y());
-        prepareForDraw(currentBrush->isOpaque());
+        prepareForDraw(currentBrush.isOpaque());
         composite(rect);
     } else if (path.isConvex()) {
 
@@ -931,7 +937,7 @@ void QGL2PaintEngineExPrivate::fill(const QVectorPath& path)
 #endif
             }
 
-            prepareForDraw(currentBrush->isOpaque());
+            prepareForDraw(currentBrush.isOpaque());
             glEnableVertexAttribArray(QT_VERTEX_COORDS_ATTR);
 #ifdef QT_OPENGL_CACHE_AS_VBOS
             glBindBuffer(GL_ARRAY_BUFFER, cache->vbo);
@@ -948,7 +954,7 @@ void QGL2PaintEngineExPrivate::fill(const QVectorPath& path)
                 path.makeCacheable();
             vertexCoordinateArray.clear();
             vertexCoordinateArray.addPath(path, inverseScale, false);
-            prepareForDraw(currentBrush->isOpaque());
+            prepareForDraw(currentBrush.isOpaque());
             drawVertexArrays(vertexCoordinateArray, GL_TRIANGLE_FAN);
         }
 
@@ -1019,7 +1025,7 @@ void QGL2PaintEngineExPrivate::fill(const QVectorPath& path)
 #endif
             }
 
-            prepareForDraw(currentBrush->isOpaque());
+            prepareForDraw(currentBrush.isOpaque());
             glEnableVertexAttribArray(QT_VERTEX_COORDS_ATTR);
 #ifdef QT_OPENGL_CACHE_AS_VBOS
             glBindBuffer(GL_ARRAY_BUFFER, cache->vbo);
@@ -1059,7 +1065,7 @@ void QGL2PaintEngineExPrivate::fill(const QVectorPath& path)
                 glStencilFunc(GL_NOTEQUAL, 0, GL_STENCIL_HIGH_BIT);
             }
 
-            prepareForDraw(currentBrush->isOpaque());
+            prepareForDraw(currentBrush.isOpaque());
 
             if (inRenderText)
                 prepareDepthRangeForRenderText();
@@ -1257,10 +1263,10 @@ bool QGL2PaintEngineExPrivate::prepareForDraw(bool srcPixelsAreOpaque)
                                       : QGLEngineShaderManager::NoOpacity;
         if (stateHasOpacity && (mode != ImageDrawingMode)) {
             // Using a brush
-            bool brushIsPattern = (currentBrush->style() >= Qt::Dense1Pattern) &&
-                                  (currentBrush->style() <= Qt::DiagCrossPattern);
+            bool brushIsPattern = (currentBrush.style() >= Qt::Dense1Pattern) &&
+                                  (currentBrush.style() <= Qt::DiagCrossPattern);
 
-            if ((currentBrush->style() == Qt::SolidPattern) || brushIsPattern)
+            if ((currentBrush.style() == Qt::SolidPattern) || brushIsPattern)
                 opacityMode = QGLEngineShaderManager::NoOpacity; // Global opacity handled by srcPixel shader
         }
     }
@@ -1388,7 +1394,7 @@ void QGL2PaintEngineEx::fill(const QVectorPath &path, const QBrush &brush)
         d->matrixDirty = true;
     }
 
-    d->setBrush(&brush);
+    d->setBrush(brush);
     d->fill(path);
 
     if (doOffset) {
@@ -1427,7 +1433,7 @@ void QGL2PaintEngineEx::stroke(const QVectorPath &path, const QPen &pen)
     }
 
     bool opaque = penBrush.isOpaque() && s->opacity > 0.99;
-    d->setBrush(&penBrush);
+    d->setBrush(penBrush);
     d->transferMode(BrushDrawingMode);
 
     // updateMatrix() is responsible for setting the inverse scale on
@@ -1706,7 +1712,7 @@ void QGL2PaintEngineExPrivate::drawCachedGlyphs(const QPointF &p, QFontEngineGly
         glVertexAttribPointer(QT_TEXTURE_COORDS_ATTR, 2, GL_FLOAT, GL_FALSE, 0, textureCoordinateArray.data());
 
     QBrush pensBrush = q->state()->pen.brush();
-    setBrush(&pensBrush);
+    setBrush(pensBrush);
 
     if (inRenderText)
         prepareDepthRangeForRenderText();
@@ -1751,7 +1757,7 @@ void QGL2PaintEngineExPrivate::drawCachedGlyphs(const QPointF &p, QFontEngineGly
                 q->state()->opacity = 1;
                 opacityUniformDirty = true;
                 pensBrush = Qt::white;
-                setBrush(&pensBrush);
+                setBrush(pensBrush);
             }
 
             compositionModeDirty = false; // I can handle this myself, thank you very much
@@ -1772,7 +1778,7 @@ void QGL2PaintEngineExPrivate::drawCachedGlyphs(const QPointF &p, QFontEngineGly
                 q->state()->opacity = oldOpacity;
                 opacityUniformDirty = true;
                 pensBrush = q->state()->pen.brush();
-                setBrush(&pensBrush);
+                setBrush(pensBrush);
             }
 
             compositionModeDirty = false;
@@ -1917,6 +1923,7 @@ bool QGL2PaintEngineEx::begin(QPaintDevice *pdev)
     d->opacityUniformDirty = true;
     d->needsSync = true;
     d->use_system_clip = !systemClip().isEmpty();
+    d->currentBrush = QBrush();
 
     d->dirtyStencilRegion = QRect(0, 0, d->width, d->height);
     d->stencilClean = true;
diff --git a/src/opengl/gl2paintengineex/qpaintengineex_opengl2_p.h b/src/opengl/gl2paintengineex/qpaintengineex_opengl2_p.h
index 844d42b..c78b011 100644
--- a/src/opengl/gl2paintengineex/qpaintengineex_opengl2_p.h
+++ b/src/opengl/gl2paintengineex/qpaintengineex_opengl2_p.h
@@ -171,7 +171,6 @@ public:
             q(q_ptr),
             width(0), height(0),
             ctx(0),
-            currentBrush(0),
             inverseScale(1),
             shaderManager(0),
             inRenderText(false)
@@ -185,7 +184,7 @@ public:
     void updateCompositionMode();
     void updateTextureFilter(GLenum target, GLenum wrapMode, bool smoothPixmapTransform, GLuint id = -1);
 
-    void setBrush(const QBrush* brush);
+    void setBrush(const QBrush& brush);
 
     void transferMode(EngineMode newMode);
     void resetGLState();
@@ -244,7 +243,7 @@ public:
     QRect currentScissorBounds;
     uint maxClip;
 
-    const QBrush*    currentBrush; // May not be the state's brush!
+    QBrush currentBrush; // May not be the state's brush!
 
     GLfloat     inverseScale;
 
@@ -255,7 +254,7 @@ public:
     GLfloat staticVertexCoordinateArray[8];
     GLfloat staticTextureCoordinateArray[8];
 
-    GLfloat pmvMatrix[4][4];
+    GLfloat pmvMatrix[3][3];
 
     QGLEngineShaderManager* shaderManager;
 
@@ -291,10 +290,7 @@ public:
     QScopedPointer<QPixmapFilter> convolutionFilter;
     QScopedPointer<QPixmapFilter> colorizeFilter;
     QScopedPointer<QPixmapFilter> blurFilter;
-    QScopedPointer<QPixmapFilter> animationBlurFilter;
-    QScopedPointer<QPixmapFilter> fastBlurFilter;
     QScopedPointer<QPixmapFilter> dropShadowFilter;
-    QScopedPointer<QPixmapFilter> fastDropShadowFilter;
 
     QSet<QVectorPath::CacheEntry *> pathCaches;
     QVector<GLuint> unusedVBOSToClean;
diff --git a/src/opengl/gl2paintengineex/qtriangulatingstroker.cpp b/src/opengl/gl2paintengineex/qtriangulatingstroker.cpp
index 6082f49..395b8a3 100644
--- a/src/opengl/gl2paintengineex/qtriangulatingstroker.cpp
+++ b/src/opengl/gl2paintengineex/qtriangulatingstroker.cpp
@@ -62,8 +62,14 @@ void QTriangulatingStroker::endCapOrJoinClosed(const qreal *start, const qreal *
         endCap(cur);
     }
     int count = m_vertices.size();
-    m_vertices.add(m_vertices.at(count-2));
-    m_vertices.add(m_vertices.at(count-1));
+
+    // Copy the (x, y) values because QDataBuffer::add(const float& t)
+    // may resize the buffer, which will leave t pointing at the
+    // previous buffer's memory region if we don't copy first.
+    float x = m_vertices.at(count-2);
+    float y = m_vertices.at(count-1);
+    m_vertices.add(x);
+    m_vertices.add(y);
 }
 
 
diff --git a/src/opengl/qgl.cpp b/src/opengl/qgl.cpp
index b6f8919..466e851 100644
--- a/src/opengl/qgl.cpp
+++ b/src/opengl/qgl.cpp
@@ -2063,6 +2063,29 @@ QGLTexture *QGLContextPrivate::bindTexture(const QImage &image, GLenum target, G
 
 // #define QGL_BIND_TEXTURE_DEBUG
 
+// map from Qt's ARGB endianness-dependent format to GL's big-endian RGBA layout
+static inline void qgl_byteSwapImage(QImage &img, GLenum pixel_type)
+{
+    const int width = img.width();
+    const int height = img.height();
+
+    if (pixel_type == GL_UNSIGNED_INT_8_8_8_8_REV
+        || (pixel_type == GL_UNSIGNED_BYTE && QSysInfo::ByteOrder == QSysInfo::LittleEndian))
+    {
+        for (int i = 0; i < height; ++i) {
+            uint *p = (uint *) img.scanLine(i);
+            for (int x = 0; x < width; ++x)
+                p[x] = ((p[x] << 16) & 0xff0000) | ((p[x] >> 16) & 0xff) | (p[x] & 0xff00ff00);
+        }
+    } else {
+        for (int i = 0; i < height; ++i) {
+            uint *p = (uint *) img.scanLine(i);
+            for (int x = 0; x < width; ++x)
+                p[x] = (p[x] << 8) | ((p[x] >> 24) & 0xff);
+        }
+    }
+}
+
 QGLTexture* QGLContextPrivate::bindTexture(const QImage &image, GLenum target, GLint internalFormat,
                                            const qint64 key, QGLContext::BindOptions options)
 {
@@ -2215,23 +2238,7 @@ QGLTexture* QGLContextPrivate::bindTexture(const QImage &image, GLenum target, G
         // 32 in the switch above is for the RGB16 case, where we set
         // the format to GL_RGB
         Q_ASSERT(img.depth() == 32);
-        const int width = img.width();
-        const int height = img.height();
-
-        if (pixel_type == GL_UNSIGNED_INT_8_8_8_8_REV
-            || (pixel_type == GL_UNSIGNED_BYTE && QSysInfo::ByteOrder == QSysInfo::LittleEndian)) {
-            for (int i=0; i < height; ++i) {
-                uint *p = (uint *) img.scanLine(i);
-                for (int x=0; x<width; ++x)
-                    p[x] = ((p[x] << 16) & 0xff0000) | ((p[x] >> 16) & 0xff) | (p[x] & 0xff00ff00);
-            }
-        } else {
-            for (int i=0; i < height; ++i) {
-                uint *p = (uint *) img.scanLine(i);
-                for (int x=0; x<width; ++x)
-                    p[x] = (p[x] << 8) | ((p[x] >> 24) & 0xff);
-            }
-        }
+        qgl_byteSwapImage(img, pixel_type);
     }
 #ifdef QT_OPENGL_ES
     // OpenGL/ES requires that the internal and external formats be identical.
@@ -3803,6 +3810,11 @@ bool QGLWidget::event(QEvent *e)
     }
 
 #if defined(QT_OPENGL_ES)
+    // A re-parent is likely to destroy the X11 window and re-create it. It is important
+    // that we free the EGL surface _before_ the winID changes - otherwise we can leak.
+    if (e->type() == QEvent::ParentAboutToChange)
+        d->glcx->d_func()->destroyEglSurfaceForDevice();
+
     if ((e->type() == QEvent::ParentChange) || (e->type() == QEvent::WindowStateChange)) {
         // The window may have been re-created during re-parent or state change - if so, the EGL
         // surface will need to be re-created.
@@ -4290,6 +4302,7 @@ static void qt_save_gl_state()
     glDisable(GL_CULL_FACE);
     glDisable(GL_LIGHTING);
     glDisable(GL_STENCIL_TEST);
+    glDisable(GL_DEPTH_TEST);
     glEnable(GL_BLEND);
     glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
 }
@@ -4343,6 +4356,10 @@ static void qt_gl_draw_text(QPainter *p, int x, int y, const QString &str,
    \note This function clears the stencil buffer.
 
    \note This function is not supported on OpenGL/ES systems.
+
+   \note This function temporarily disables depth-testing when the
+   text is drawn.
+
    \l{Overpainting Example}{Overpaint} with QPainter::drawText() instead.
 */
 
@@ -4433,6 +4450,13 @@ void QGLWidget::renderText(int x, int y, const QString &str, const QFont &font,
     have the labels move with the model as it is rotated etc.
 
     \note This function is not supported on OpenGL/ES systems.
+
+    \note If depth testing is enabled before this function is called,
+    then the drawn text will be depth-tested against the models that
+    have already been drawn in the scene.  Use \c{glDisable(GL_DEPTH_TEST)}
+    before calling this function to annotate the models without
+    depth-testing the text.
+
     \l{Overpainting Example}{Overpaint} with QPainter::drawText() instead.
 */
 void QGLWidget::renderText(double x, double y, double z, const QString &str, const QFont &font, int)
diff --git a/src/opengl/qgl.h b/src/opengl/qgl.h
index 079953f..2076c46 100644
--- a/src/opengl/qgl.h
+++ b/src/opengl/qgl.h
@@ -546,6 +546,7 @@ private:
     friend class QGLPixelBuffer;
     friend class QGLPixelBufferPrivate;
     friend class QGLContext;
+    friend class QGLContextPrivate;
     friend class QGLOverlayWidget;
     friend class QOpenGLPaintEngine;
     friend class QGLPaintDevice;
diff --git a/src/opengl/qgl_egl.cpp b/src/opengl/qgl_egl.cpp
index fbf0349..839e8eb 100644
--- a/src/opengl/qgl_egl.cpp
+++ b/src/opengl/qgl_egl.cpp
@@ -142,19 +142,7 @@ void QGLContext::reset()
     d->cleanup();
     doneCurrent();
     if (d->eglContext) {
-        if (d->eglSurface != EGL_NO_SURFACE) {
-#ifdef Q_WS_X11
-            // Make sure we don't call eglDestroySurface on a surface which
-            // was created for a different winId:
-            if (d->paintDevice->devType() == QInternal::Widget) {
-                QGLWidget* w = static_cast<QGLWidget*>(d->paintDevice);
-
-                if (w->d_func()->eglSurfaceWindowId == w->winId())
-                    eglDestroySurface(d->eglContext->display(), d->eglSurface);
-            } else
-#endif
-                eglDestroySurface(d->eglContext->display(), d->eglSurface);
-        }
+        d->destroyEglSurfaceForDevice();
         delete d->eglContext;
     }
     d->eglContext = 0;
@@ -198,6 +186,26 @@ void QGLContext::swapBuffers() const
     d->eglContext->swapBuffers(d->eglSurface);
 }
 
+void QGLContextPrivate::destroyEglSurfaceForDevice()
+{
+    if (eglSurface != EGL_NO_SURFACE) {
+#ifdef Q_WS_X11
+        // Make sure we don't call eglDestroySurface on a surface which
+        // was created for a different winId:
+        if (paintDevice->devType() == QInternal::Widget) {
+            QGLWidget* w = static_cast<QGLWidget*>(paintDevice);
+
+            if (w->d_func()->eglSurfaceWindowId == w->winId())
+                eglDestroySurface(eglContext->display(), eglSurface);
+            else
+                qWarning("WARNING: Potential EGL surface leak!");
+        } else
+#endif
+            eglDestroySurface(eglContext->display(), eglSurface);
+        eglSurface = EGL_NO_SURFACE;
+    }
+}
+
 void QGLWidget::setMouseTracking(bool enable)
 {
     QWidget::setMouseTracking(enable);
diff --git a/src/opengl/qgl_p.h b/src/opengl/qgl_p.h
index 11770d3..99c0f33 100644
--- a/src/opengl/qgl_p.h
+++ b/src/opengl/qgl_p.h
@@ -288,6 +288,7 @@ public:
 #if defined(QT_OPENGL_ES)
     QEglContext *eglContext;
     EGLSurface eglSurface;
+    void destroyEglSurfaceForDevice();
 #elif defined(Q_WS_X11) || defined(Q_WS_MAC)
     void* cx;
 #endif
diff --git a/src/opengl/qgl_x11egl.cpp b/src/opengl/qgl_x11egl.cpp
index a868e83..19026b3 100644
--- a/src/opengl/qgl_x11egl.cpp
+++ b/src/opengl/qgl_x11egl.cpp
@@ -173,10 +173,16 @@ void QGLWidget::updateOverlayGL()
     //handle overlay
 }
 
+//#define QT_DEBUG_X11_VISUAL_SELECTION 1
+
 bool qt_egl_setup_x11_visual(XVisualInfo &vi, EGLDisplay display, EGLConfig config, const QX11Info &x11Info, bool useArgbVisual)
 {
     bool foundVisualIsArgb = useArgbVisual;
 
+#ifdef QT_DEBUG_X11_VISUAL_SELECTION
+    qDebug("qt_egl_setup_x11_visual() - useArgbVisual=%d", useArgbVisual);
+#endif
+
     memset(&vi, 0, sizeof(XVisualInfo));
 
     EGLint eglConfigColorSize;
@@ -199,7 +205,9 @@ bool qt_egl_setup_x11_visual(XVisualInfo &vi, EGLDisplay display, EGLConfig conf
                 XRenderPictFormat *format;
                 format = XRenderFindVisualFormat(x11Info.display(), chosenVisualInfo->visual);
                 if (format->type == PictTypeDirect && format->direct.alphaMask) {
-//                    qDebug("Using ARGB X Visual ID (%d) provided by EGL", (int)vi.visualid);
+#ifdef QT_DEBUG_X11_VISUAL_SELECTION
+                    qDebug("Using ARGB X Visual ID (%d) provided by EGL", (int)vi.visualid);
+#endif
                     foundVisualIsArgb = true;
                     vi = *chosenVisualInfo;
                 }
@@ -212,7 +220,9 @@ bool qt_egl_setup_x11_visual(XVisualInfo &vi, EGLDisplay display, EGLConfig conf
 #endif
             {
                 if (eglConfigColorSize == chosenVisualInfo->depth) {
-//                    qDebug("Using opaque X Visual ID (%d) provided by EGL", (int)vi.visualid);
+#ifdef QT_DEBUG_X11_VISUAL_SELECTION
+                    qDebug("Using opaque X Visual ID (%d) provided by EGL", (int)vi.visualid);
+#endif
                     vi = *chosenVisualInfo;
                 } else
                     qWarning("Warning: EGL suggested using X visual ID %d (%d bpp) for config %d (%d bpp), but the depths do not match!",
@@ -248,7 +258,9 @@ bool qt_egl_setup_x11_visual(XVisualInfo &vi, EGLDisplay display, EGLConfig conf
             if (format->type == PictTypeDirect && format->direct.alphaMask) {
                 vi = matchingVisuals[i];
                 foundVisualIsArgb = true;
-//                qDebug("Using X Visual ID (%d) for ARGB visual as provided by XRender", (int)vi.visualid);
+#ifdef QT_DEBUG_X11_VISUAL_SELECTION
+                qDebug("Using X Visual ID (%d) for ARGB visual as provided by XRender", (int)vi.visualid);
+#endif
                 break;
             }
         }
@@ -272,24 +284,28 @@ bool qt_egl_setup_x11_visual(XVisualInfo &vi, EGLDisplay display, EGLConfig conf
             } else
                 qWarning("         - Falling back to X11 suggested depth (%d)", depth);
         }
-//        else
-//            qDebug("Using X Visual ID (%d) for EGL provided depth (%d)", (int)vi.visualid, depth);
+#ifdef QT_DEBUG_X11_VISUAL_SELECTION
+        else
+            qDebug("Using X Visual ID (%d) for EGL provided depth (%d)", (int)vi.visualid, depth);
+#endif
 
         // Don't try to use ARGB now unless the visual is 32-bit - even then it might stil fail :-(
         if (useArgbVisual)
             foundVisualIsArgb = vi.depth == 32; //### We might at some point (soon) get ARGB4444
     }
 
-//    qDebug("Visual Info:");
-//    qDebug("   bits_per_rgb=%d", vi.bits_per_rgb);
-//    qDebug("   red_mask=0x%x", vi.red_mask);
-//    qDebug("   green_mask=0x%x", vi.green_mask);
-//    qDebug("   blue_mask=0x%x", vi.blue_mask);
-//    qDebug("   colormap_size=%d", vi.colormap_size);
-//    qDebug("   c_class=%d", vi.c_class);
-//    qDebug("   depth=%d", vi.depth);
-//    qDebug("   screen=%d", vi.screen);
-//    qDebug("   visualid=%d", vi.visualid);
+#ifdef QT_DEBUG_X11_VISUAL_SELECTION
+    qDebug("Visual Info:");
+    qDebug("   bits_per_rgb=%d", vi.bits_per_rgb);
+    qDebug("   red_mask=0x%x", vi.red_mask);
+    qDebug("   green_mask=0x%x", vi.green_mask);
+    qDebug("   blue_mask=0x%x", vi.blue_mask);
+    qDebug("   colormap_size=%d", vi.colormap_size);
+    qDebug("   c_class=%d", vi.c_class);
+    qDebug("   depth=%d", vi.depth);
+    qDebug("   screen=%d", vi.screen);
+    qDebug("   visualid=%d", vi.visualid);
+#endif
     return foundVisualIsArgb;
 }
 
@@ -320,7 +336,7 @@ void QGLWidget::setContext(QGLContext *context, const QGLContext* shareContext,
     // If the application has set WA_TranslucentBackground and not explicitly set
     // the alpha buffer size to zero, modify the format so it have an alpha channel
     QGLFormat& fmt = d->glcx->d_func()->glFormat;
-    const bool tryArgbVisual = testAttribute(Qt::WA_TranslucentBackground);
+    const bool tryArgbVisual = testAttribute(Qt::WA_TranslucentBackground) || fmt.alpha();
     if (tryArgbVisual && fmt.alphaBufferSize() == -1)
         fmt.setAlphaBufferSize(1);
 
diff --git a/src/opengl/qglframebufferobject.cpp b/src/opengl/qglframebufferobject.cpp
index d0297c9..4b5c30a 100644
--- a/src/opengl/qglframebufferobject.cpp
+++ b/src/opengl/qglframebufferobject.cpp
@@ -597,6 +597,12 @@ void QGLFramebufferObjectPrivate::init(QGLFramebufferObject *q, const QSize &sz,
     the constructors that take a QGLFramebufferObject parameter, and set the
     QGLFramebufferObject::samples() property to a non-zero value.
 
+    When painting to a QGLFramebufferObject using QPainter, the state of
+    the current GL context will be altered by the paint engine to reflect
+    its needs.  Applications should not rely upon the GL state being reset
+    to its original conditions, particularly the current shader program,
+    GL viewport, texture units, and drawing modes.
+
     For multisample framebuffer objects a color render buffer is created,
     otherwise a texture with the specified texture target is created.
     The color render buffer or texture will have the specified internal
diff --git a/src/opengl/qglpixmapfilter.cpp b/src/opengl/qglpixmapfilter.cpp
index c478630..d4bcbe9 100644
--- a/src/opengl/qglpixmapfilter.cpp
+++ b/src/opengl/qglpixmapfilter.cpp
@@ -55,11 +55,17 @@
 #include "qgl_p.h"
 
 #include "private/qapplication_p.h"
+#include "private/qdrawhelper_p.h"
+#include "private/qmemrotate_p.h"
 #include "private/qmath_p.h"
 #include "qmath.h"
 
 QT_BEGIN_NAMESPACE
 
+// qpixmapfilter.cpp
+void qt_blurImage(QImage &blurImage, qreal radius, bool quality, int transposed = 0);
+QImage qt_halfScaled(const QImage &source);
+
 void QGLPixmapFilterBase::bindTexture(const QPixmap &src) const
 {
     const_cast<QGLContext *>(QGLContext::currentContext())->d_func()->bindTexture(src, GL_TEXTURE_2D, GL_RGBA, QGLContext::BindOptions(QGLContext::DefaultBindOption | QGLContext::MemoryManagedBindOption));
@@ -102,48 +108,21 @@ private:
 class QGLPixmapBlurFilter : public QGLCustomShaderStage, public QGLPixmapFilter<QPixmapBlurFilter>
 {
 public:
-    QGLPixmapBlurFilter(QGraphicsBlurEffect::BlurHints hints);
-
-    void setUniforms(QGLShaderProgram *program);
-
-    static QByteArray generateGaussianShader(int radius, bool singlePass = false, bool dropShadow = false);
+    QGLPixmapBlurFilter();
 
 protected:
     bool processGL(QPainter *painter, const QPointF &pos, const QPixmap &src, const QRectF &srcRect) const;
-
-private:
-
-    mutable QSize m_textureSize;
-    mutable bool m_horizontalBlur;
-    mutable bool m_singlePass;
-    mutable bool m_animatedBlur;
-
-    mutable qreal m_t;
-    mutable QSize m_targetSize;
-
-    mutable bool m_haveCached;
-    mutable int m_cachedRadius;
-    mutable QGraphicsBlurEffect::BlurHints m_hints;
 };
 
 class QGLPixmapDropShadowFilter : public QGLCustomShaderStage, public QGLPixmapFilter<QPixmapDropShadowFilter>
 {
 public:
-    QGLPixmapDropShadowFilter(QGraphicsBlurEffect::BlurHints hints);
+    QGLPixmapDropShadowFilter();
 
     void setUniforms(QGLShaderProgram *program);
 
 protected:
     bool processGL(QPainter *painter, const QPointF &pos, const QPixmap &src, const QRectF &srcRect) const;
-
-private:
-    mutable QSize m_textureSize;
-    mutable bool m_horizontalBlur;
-    mutable bool m_singlePass;
-
-    mutable bool m_haveCached;
-    mutable int m_cachedRadius;
-    mutable QGraphicsBlurEffect::BlurHints m_hints;
 };
 
 extern QGLWidget *qt_gl_share_widget();
@@ -158,31 +137,14 @@ QPixmapFilter *QGL2PaintEngineEx::pixmapFilter(int type, const QPixmapFilter *pr
         return d->colorizeFilter.data();
 
     case QPixmapFilter::BlurFilter: {
-        const QPixmapBlurFilter *proto = static_cast<const QPixmapBlurFilter *>(prototype);
-        if (proto->blurHints() & QGraphicsBlurEffect::AnimationHint) {
-            if (!d->animationBlurFilter)
-                d->animationBlurFilter.reset(new QGLPixmapBlurFilter(proto->blurHints()));
-            return d->animationBlurFilter.data();
-        }
-        if ((proto->blurHints() & QGraphicsBlurEffect::QualityHint) && proto->radius() > 5) {
-            if (!d->blurFilter)
-                d->blurFilter.reset(new QGLPixmapBlurFilter(QGraphicsBlurEffect::QualityHint));
-            return d->blurFilter.data();
-        }
-        if (!d->fastBlurFilter)
-            d->fastBlurFilter.reset(new QGLPixmapBlurFilter(QGraphicsBlurEffect::PerformanceHint));
-        return d->fastBlurFilter.data();
+        if (!d->blurFilter)
+            d->blurFilter.reset(new QGLPixmapBlurFilter());
+        return d->blurFilter.data();
         }
 
     case QPixmapFilter::DropShadowFilter: {
-        const QPixmapDropShadowFilter *proto = static_cast<const QPixmapDropShadowFilter *>(prototype);
-        if (proto->blurRadius() <= 5) {
-            if (!d->fastDropShadowFilter)
-                d->fastDropShadowFilter.reset(new QGLPixmapDropShadowFilter(QGraphicsBlurEffect::PerformanceHint));
-            return d->fastDropShadowFilter.data();
-        }
         if (!d->dropShadowFilter)
-            d->dropShadowFilter.reset(new QGLPixmapDropShadowFilter(QGraphicsBlurEffect::QualityHint));
+            d->dropShadowFilter.reset(new QGLPixmapDropShadowFilter());
         return d->dropShadowFilter.data();
         }
 
@@ -311,59 +273,43 @@ bool QGLPixmapConvolutionFilter::processGL(QPainter *painter, const QPointF &pos
     return true;
 }
 
-static const char *qt_gl_texture_sampling_helper =
-    "lowp float texture2DAlpha(lowp sampler2D src, highp vec2 srcCoords) {\n"
-    "   return texture2D(src, srcCoords).a;\n"
-    "}\n";
-
-QGLPixmapBlurFilter::QGLPixmapBlurFilter(QGraphicsBlurEffect::BlurHints hints)
-    : m_animatedBlur(false)
-    , m_haveCached(false)
-    , m_cachedRadius(0)
-    , m_hints(hints)
-{
-}
-
-// should be even numbers as they will be divided by two
-static const int qCachedBlurLevels[] = { 6, 14, 30 };
-static const int qNumCachedBlurTextures = sizeof(qCachedBlurLevels) / sizeof(*qCachedBlurLevels);
-static const int qMaxCachedBlurLevel = qCachedBlurLevels[qNumCachedBlurTextures - 1];
-
-static qreal qLogBlurLevel(int level)
+QGLPixmapBlurFilter::QGLPixmapBlurFilter()
 {
-    static bool initialized = false;
-    static qreal logBlurLevelCache[qNumCachedBlurTextures];
-    if (!initialized) {
-        for (int i = 0; i < qNumCachedBlurTextures; ++i)
-            logBlurLevelCache[i] = qLn(qCachedBlurLevels[i]);
-        initialized = true;
-    }
-    return logBlurLevelCache[level];
 }
 
 class QGLBlurTextureInfo
 {
 public:
-    QGLBlurTextureInfo(QSize size, GLuint textureIds[])
-        : m_size(size)
+    QGLBlurTextureInfo(const QImage &image, GLuint tex, qreal r)
+        : m_texture(tex)
+        , m_radius(r)
     {
-        for (int i = 0; i < qNumCachedBlurTextures; ++i)
-            m_textureIds[i] = textureIds[i];
+        m_paddedImage << image;
     }
 
     ~QGLBlurTextureInfo()
     {
-        glDeleteTextures(qNumCachedBlurTextures, m_textureIds);
+        glDeleteTextures(1, &m_texture);
     }
 
-    QSize size() const { return m_size; }
-    GLuint textureId(int i) const { return m_textureIds[i]; }
+    QImage paddedImage(int scaleLevel = 0) const;
+    GLuint texture() const { return m_texture; }
+    qreal radius() const { return m_radius; }
 
 private:
-    GLuint m_textureIds[qNumCachedBlurTextures];
-    QSize m_size;
+    mutable QList<QImage> m_paddedImage;
+    GLuint m_texture;
+    qreal m_radius;
 };
 
+QImage QGLBlurTextureInfo::paddedImage(int scaleLevel) const
+{
+    for (int i = m_paddedImage.size() - 1; i <= scaleLevel; ++i)
+        m_paddedImage << qt_halfScaled(m_paddedImage.at(i));
+
+    return m_paddedImage.at(scaleLevel);
+}
+
 class QGLBlurTextureCache : public QObject
 {
 public:
@@ -373,7 +319,6 @@ public:
     ~QGLBlurTextureCache();
 
     QGLBlurTextureInfo *takeBlurTextureInfo(const QPixmap &pixmap);
-    bool fitsInCache(const QPixmap &pixmap) const;
     bool hasBlurTextureInfo(const QPixmap &pixmap) const;
     void insertBlurTextureInfo(const QPixmap &pixmap, QGLBlurTextureInfo *info);
     void clearBlurTextureInfo(const QPixmap &pixmap);
@@ -458,12 +403,7 @@ void QGLBlurTextureCache::insertBlurTextureInfo(const QPixmap &pixmap, QGLBlurTe
     if (timerId)
         killTimer(timerId);
 
-    timerId = startTimer(1000);
-}
-
-bool QGLBlurTextureCache::fitsInCache(const QPixmap &pixmap) const
-{
-    return pixmap.width() * pixmap.height() <= cache.maxCost();
+    timerId = startTimer(8000);
 }
 
 void QGLBlurTextureCache::pixmapDestroyed(QPixmap *pixmap)
@@ -474,567 +414,217 @@ void QGLBlurTextureCache::pixmapDestroyed(QPixmap *pixmap)
     }
 }
 
-static const char *qt_gl_interpolate_filter =
-        "uniform lowp float interpolationValue;"
-        "uniform lowp sampler2D interpolateTarget;"
-        "uniform highp vec4 interpolateMapping;"
-        "lowp vec4 customShader(lowp sampler2D src, highp vec2 srcCoords)"
-        "{"
-        "    return mix(texture2D(interpolateTarget, interpolateMapping.xy + interpolateMapping.zw * srcCoords),"
-        "               texture2D(src, srcCoords), interpolationValue);"
-        "}";
+static const int qAnimatedBlurLevelIncrement = 16;
+static const int qMaxBlurHalfScaleLevel = 1;
 
-static void initializeTexture(GLuint id, int width, int height)
+static GLuint generateBlurTexture(const QSize &size, GLenum format = GL_RGBA)
 {
-    glBindTexture(GL_TEXTURE_2D, id);
-    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0,
-                 GL_RGBA, GL_UNSIGNED_BYTE, NULL);
-    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
-    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
-    glBindTexture(GL_TEXTURE_2D, 0);
+    GLuint texture;
+    glGenTextures(1, &texture);
+    glBindTexture(GL_TEXTURE_2D, texture);
+    glTexImage2D(GL_TEXTURE_2D, 0, format, size.width(), size.height(), 0, format,
+                 GL_UNSIGNED_BYTE, 0);
+    return texture;
 }
 
-bool QGLPixmapBlurFilter::processGL(QPainter *painter, const QPointF &pos, const QPixmap &src, const QRectF &) const
+static inline uint nextMultiple(uint x, uint multiplier)
 {
-    QGLPixmapBlurFilter *filter = const_cast<QGLPixmapBlurFilter *>(this);
-
-    QGLContext *ctx = const_cast<QGLContext *>(QGLContext::currentContext());
-    QGLBlurTextureCache *blurTextureCache = QGLBlurTextureCache::cacheForContext(ctx);
-
-    if ((m_hints & QGraphicsBlurEffect::AnimationHint) && blurTextureCache->fitsInCache(src)) {
-        QRect targetRect = src.rect().adjusted(-qMaxCachedBlurLevel, -qMaxCachedBlurLevel, qMaxCachedBlurLevel, qMaxCachedBlurLevel);
-        // ensure even dimensions (going to divide by two)
-        targetRect.setWidth((targetRect.width() + 1) & ~1);
-        targetRect.setHeight((targetRect.height() + 1) & ~1);
-
-        QGLBlurTextureInfo *info = 0;
-        if (blurTextureCache->hasBlurTextureInfo(src)) {
-            info = blurTextureCache->takeBlurTextureInfo(src);
-        } else {
-            m_animatedBlur = false;
-            m_hints = QGraphicsBlurEffect::QualityHint;
-            m_singlePass = false;
-
-            QGLFramebufferObjectFormat format;
-            format.setInternalTextureFormat(GLenum(GL_RGBA));
-            QGLFramebufferObject *fbo = qgl_fbo_pool()->acquire(targetRect.size() / 2, format, true);
-
-            if (!fbo)
-                return false;
-
-            QPainter fboPainter(fbo);
-            QGL2PaintEngineEx *engine = static_cast<QGL2PaintEngineEx *>(fboPainter.paintEngine());
-
-            glClearColor(0, 0, 0, 0);
-            glClear(GL_COLOR_BUFFER_BIT);
-
-            // ensure GL_LINEAR filtering is used for scaling down to half the size
-            fboPainter.setRenderHint(QPainter::SmoothPixmapTransform);
-            fboPainter.setCompositionMode(QPainter::CompositionMode_Source);
-            fboPainter.drawPixmap(qMaxCachedBlurLevel / 2, qMaxCachedBlurLevel / 2,
-                    targetRect.width() / 2 - qMaxCachedBlurLevel, targetRect.height() / 2 - qMaxCachedBlurLevel, src);
-
-            GLuint textures[qNumCachedBlurTextures]; // blur textures
-            glGenTextures(qNumCachedBlurTextures, textures);
-            GLuint temp; // temp texture
-            glGenTextures(1, &temp);
-
-            initializeTexture(temp, fbo->width(), fbo->height());
-            m_textureSize = fbo->size();
-
-            int currentBlur = 0;
-
-            QRect fboRect(0, 0, fbo->width(), fbo->height());
-            GLuint sourceTexture = fbo->texture();
-            for (int i = 0; i < qNumCachedBlurTextures; ++i) {
-                int targetBlur = qCachedBlurLevels[i] / 2;
-
-                int blurDelta = qRound(qSqrt(targetBlur * targetBlur - currentBlur * currentBlur));
-                QByteArray source = generateGaussianShader(blurDelta);
-                filter->setSource(source);
-
-                currentBlur = targetBlur;
-
-                // now we're going to be nasty and keep using the same FBO with different textures
-                glFramebufferTexture2D(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
-                        GL_TEXTURE_2D, temp, 0);
-
-                m_horizontalBlur = true;
-                filter->setOnPainter(&fboPainter);
-                engine->drawTexture(fboRect, sourceTexture, fbo->size(), fboRect);
-                filter->removeFromPainter(&fboPainter);
-
-                sourceTexture = textures[i];
-                initializeTexture(sourceTexture, fbo->width(), fbo->height());
-
-                glFramebufferTexture2D(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
-                        GL_TEXTURE_2D, textures[i], 0);
-
-                m_horizontalBlur = false;
-                filter->setOnPainter(&fboPainter);
-                engine->drawTexture(fboRect, temp, fbo->size(), fboRect);
-                filter->removeFromPainter(&fboPainter);
-            }
-
-            glDeleteTextures(1, &temp);
+    uint mod = x % multiplier;
+    if (mod == 0)
+        return x;
+    return x + multiplier - mod;
+}
 
-            // reattach the original FBO texture
-            glFramebufferTexture2D(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
-                    GL_TEXTURE_2D, fbo->texture(), 0);
+void qt_memrotate90_gl(const quint32 *src, int srcWidth, int srcHeight, int srcStride,
+                       quint32 *dest, int dstStride);
 
-            fboPainter.end();
+bool QGLPixmapBlurFilter::processGL(QPainter *painter, const QPointF &pos, const QPixmap &src, const QRectF &) const
+{
+    if (radius() < 1) {
+        painter->drawPixmap(pos, src);
+        return true;
+    }
 
-            qgl_fbo_pool()->release(fbo);
+    qreal actualRadius = radius();
 
-            info = new QGLBlurTextureInfo(fboRect.size(), textures);
-        }
+    QGLContext *ctx = const_cast<QGLContext *>(QGLContext::currentContext());
 
-        if (!m_haveCached || !m_animatedBlur) {
-            m_haveCached = true;
-            m_animatedBlur = true;
-            m_hints = QGraphicsBlurEffect::AnimationHint;
-            filter->setSource(qt_gl_interpolate_filter);
-        }
+    QGLBlurTextureCache *blurTextureCache = QGLBlurTextureCache::cacheForContext(ctx);
+    QGLBlurTextureInfo *info = 0;
+    int padding = nextMultiple(qCeil(actualRadius), qAnimatedBlurLevelIncrement);
+    QRect targetRect = src.rect().adjusted(-padding, -padding, padding, padding);
 
-        QGL2PaintEngineEx *engine = static_cast<QGL2PaintEngineEx *>(painter->paintEngine());
-        painter->setRenderHint(QPainter::SmoothPixmapTransform);
-        filter->setOnPainter(painter);
+    // pad so that we'll be able to half-scale qMaxBlurHalfScaleLevel times
+    targetRect.setWidth((targetRect.width() + (qMaxBlurHalfScaleLevel-1)) & ~(qMaxBlurHalfScaleLevel-1));
+    targetRect.setHeight((targetRect.height() + (qMaxBlurHalfScaleLevel-1)) & ~(qMaxBlurHalfScaleLevel-1));
 
-        qreal logRadius = qLn(radius());
+    QSize textureSize;
 
-        int t;
-        for (t = -1; t < qNumCachedBlurTextures - 2; ++t) {
-            if (logRadius < qLogBlurLevel(t+1))
-                break;
-        }
+    info = blurTextureCache->takeBlurTextureInfo(src);
+    if (!info || info->radius() < actualRadius) {
+        QSize paddedSize = targetRect.size() / 2;
 
-        qreal logBase = t >= 0 ? qLogBlurLevel(t) : 0;
-        m_t = qBound(qreal(0), (logRadius - logBase) / (qLogBlurLevel(t+1) - logBase), qreal(1));
+        QImage padded(paddedSize.height(), paddedSize.width(), QImage::Format_ARGB32_Premultiplied);
+        padded.fill(0);
 
-        m_textureSize = info->size();
+        if (info) {
+            int oldPadding = qRound(info->radius());
 
-        glActiveTexture(GL_TEXTURE0 + 3);
-        if (t >= 0) {
-            glBindTexture(GL_TEXTURE_2D, info->textureId(t));
-            m_targetSize = info->size();
+            QPainter p(&padded);
+            p.setCompositionMode(QPainter::CompositionMode_Source);
+            p.drawImage((padding - oldPadding) / 2, (padding - oldPadding) / 2, info->paddedImage());
+            p.end();
         } else {
-            QGLTexture *texture =
-                ctx->d_func()->bindTexture(src, GL_TEXTURE_2D, GL_RGBA,
-                                           QGLContext::InternalBindOption
-                                           | QGLContext::CanFlipNativePixmapBindOption);
-            m_targetSize = src.size();
-            if (!(texture->options & QGLContext::InvertedYBindOption))
-                m_targetSize.setHeight(-m_targetSize.height());
+            // TODO: combine byteswapping and memrotating into one by declaring
+            // custom GL_RGBA pixel type and qt_colorConvert template for it
+            QImage prepadded = qt_halfScaled(src.toImage()).convertToFormat(QImage::Format_ARGB32_Premultiplied);
+
+            // byte-swap and memrotates in one go
+            qt_memrotate90_gl(reinterpret_cast<const quint32*>(prepadded.bits()),
+                              prepadded.width(), prepadded.height(), prepadded.bytesPerLine(),
+                              reinterpret_cast<quint32*>(padded.scanLine(padding / 2)) + padding / 2,
+                              padded.bytesPerLine());
         }
 
-        // restrict the target rect to the max of the radii we are interpolating between
-        int radiusDelta = qMaxCachedBlurLevel - qCachedBlurLevels[t+1];
-        targetRect = targetRect.translated(pos.toPoint()).adjusted(radiusDelta, radiusDelta, -radiusDelta, -radiusDelta);
-
-        radiusDelta /= 2;
-        QRect sourceRect = QRect(QPoint(), m_textureSize).adjusted(radiusDelta, radiusDelta, -radiusDelta, -radiusDelta);
-
-        engine->drawTexture(targetRect, info->textureId(t+1), m_textureSize, sourceRect);
-
-        glActiveTexture(GL_TEXTURE0 + 3);
-        glBindTexture(GL_TEXTURE_2D, 0);
-
-        filter->removeFromPainter(painter);
-        blurTextureCache->insertBlurTextureInfo(src, info);
-
-        return true;
-    }
+        delete info;
+        info = new QGLBlurTextureInfo(padded, generateBlurTexture(paddedSize), padding);
 
-    if (blurTextureCache->hasBlurTextureInfo(src))
-        blurTextureCache->clearBlurTextureInfo(src);
-
-    int actualRadius = qRound(radius());
-    int filterRadius = actualRadius;
-    int fastRadii[] = { 1, 2, 3, 5, 8, 15, 25 };
-    if (!(m_hints & QGraphicsBlurEffect::QualityHint)) {
-        uint i = 0;
-        for (; i < (sizeof(fastRadii)/sizeof(*fastRadii))-1; ++i) {
-            if (fastRadii[i+1] > filterRadius)
-                break;
-        }
-        filterRadius = fastRadii[i];
+        textureSize = paddedSize;
+    } else {
+        textureSize = QSize(info->paddedImage().height(), info->paddedImage().width());
     }
 
-    m_singlePass = filterRadius <= 3;
-
-    if (!m_haveCached || m_animatedBlur || filterRadius != m_cachedRadius) {
-        // Only regenerate the shader from source if parameters have changed.
-        m_haveCached = true;
-        m_animatedBlur = false;
-        m_cachedRadius = filterRadius;
-        QByteArray source = generateGaussianShader(filterRadius, m_singlePass);
-        filter->setSource(source);
+    actualRadius *= qreal(0.5);
+    int level = 1;
+    for (; level < qMaxBlurHalfScaleLevel; ++level) {
+        if (actualRadius <= 16)
+            break;
+        actualRadius *= qreal(0.5);
     }
 
-    QRect targetRect = QRectF(src.rect()).translated(pos).adjusted(-actualRadius, -actualRadius, actualRadius, actualRadius).toAlignedRect();
+    const int s = (1 << level);
 
-    if (m_singlePass) {
-        // prepare for updateUniforms
-        m_textureSize = src.size();
+    int prepadding = qRound(info->radius());
+    padding = qMin(prepadding, qCeil(actualRadius) << level);
+    targetRect = src.rect().adjusted(-padding, -padding, padding, padding);
 
-        // ensure GL_LINEAR filtering is used
-        painter->setRenderHint(QPainter::SmoothPixmapTransform);
-        filter->setOnPainter(painter);
-        QBrush pixmapBrush = src;
-        pixmapBrush.setTransform(QTransform::fromTranslate(pos.x(), pos.y()));
-        painter->fillRect(targetRect, pixmapBrush);
-        filter->removeFromPainter(painter);
-    } else {
-        QGLFramebufferObjectFormat format;
-        format.setInternalTextureFormat(GLenum(src.hasAlphaChannel() ? GL_RGBA : GL_RGB));
-        QGLFramebufferObject *fbo = qgl_fbo_pool()->acquire(targetRect.size(), format);
+    targetRect.setWidth(targetRect.width() & ~(s-1));
+    targetRect.setHeight(targetRect.height() & ~(s-1));
 
-        if (!fbo)
-            return false;
+    int paddingDelta = (prepadding - padding) >> level;
 
-        // prepare for updateUniforms
-        m_textureSize = src.size();
+    QRect subRect(paddingDelta, paddingDelta, targetRect.width() >> level, targetRect.height() >> level);
+    QImage sourceImage = info->paddedImage(level-1);
 
-        // horizontal pass, to pixmap
-        m_horizontalBlur = true;
+    QImage subImage(subRect.height(), subRect.width(), QImage::Format_ARGB32_Premultiplied);
+    qt_rectcopy((QRgb *)subImage.bits(), ((QRgb *)sourceImage.scanLine(paddingDelta)) + paddingDelta,
+                0, 0, subRect.height(), subRect.width(), subImage.bytesPerLine(), sourceImage.bytesPerLine());
 
-        QPainter fboPainter(fbo);
+    GLuint texture = info->texture();
 
-        glClearColor(0, 0, 0, 0);
-        glClear(GL_COLOR_BUFFER_BIT);
+    qt_blurImage(subImage, actualRadius, blurHints() & QGraphicsBlurEffect::QualityHint, 1);
 
-        // ensure GL_LINEAR filtering is used
-        fboPainter.setRenderHint(QPainter::SmoothPixmapTransform);
-        fboPainter.setCompositionMode(QPainter::CompositionMode_Source);
-        filter->setOnPainter(&fboPainter);
-        QBrush pixmapBrush = src;
-        pixmapBrush.setTransform(QTransform::fromTranslate(actualRadius, actualRadius));
-        fboPainter.fillRect(QRect(0, 0, targetRect.width(), targetRect.height()), pixmapBrush);
-        filter->removeFromPainter(&fboPainter);
-        fboPainter.end();
+    // subtract one pixel off the end to prevent the bilinear sampling from sampling uninitialized data
+    QRect textureSubRect = subImage.rect().adjusted(0, 0, -1, -1);
+    QRectF targetRectF = QRectF(targetRect).adjusted(0, 0, -targetRect.width() / qreal(textureSize.width()), -targetRect.height() / qreal(textureSize.height()));
 
-        QGL2PaintEngineEx *engine = static_cast<QGL2PaintEngineEx *>(painter->paintEngine());
+    glBindTexture(GL_TEXTURE_2D, texture);
+    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, subImage.width(), subImage.height(), GL_RGBA,
+            GL_UNSIGNED_BYTE, const_cast<const QImage &>(subImage).bits());
 
-        // vertical pass, to painter
-        m_horizontalBlur = false;
-        m_textureSize = fbo->size();
+    QGL2PaintEngineEx *engine = static_cast<QGL2PaintEngineEx *>(painter->paintEngine());
+    painter->setRenderHint(QPainter::SmoothPixmapTransform);
 
-        painter->save();
-        // ensure GL_LINEAR filtering is used
-        painter->setRenderHint(QPainter::SmoothPixmapTransform);
-        filter->setOnPainter(painter);
-        engine->drawTexture(targetRect, fbo->texture(), fbo->size(), QRect(QPoint(), targetRect.size()).translated(0, fbo->height() - targetRect.height()));
-        filter->removeFromPainter(painter);
-        painter->restore();
+    // texture is flipped on the y-axis
+    targetRectF = QRectF(targetRectF.x(), targetRectF.bottom(), targetRectF.width(), -targetRectF.height());
+    engine->drawTexture(targetRectF.translated(pos), texture, textureSize, textureSubRect);
 
-        qgl_fbo_pool()->release(fbo);
-    }
+    blurTextureCache->insertBlurTextureInfo(src, info);
 
     return true;
 }
 
-void QGLPixmapBlurFilter::setUniforms(QGLShaderProgram *program)
-{
-    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
-    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
-
-    if (m_animatedBlur) {
-        program->setUniformValue("interpolateTarget", 3);
-        program->setUniformValue("interpolationValue", GLfloat(m_t));
-
-        if (m_textureSize == m_targetSize) {
-            program->setUniformValue("interpolateMapping", 0.0f, 0.0f, 1.0f, 1.0f);
-        } else {
-            float offsetX = (-qMaxCachedBlurLevel - 0.5) / qreal(m_targetSize.width());
-            float offsetY = (-qMaxCachedBlurLevel - 0.5) / qreal(m_targetSize.height());
-
-            if (m_targetSize.height() < 0)
-                offsetY = 1 + offsetY;
-
-            float scaleX = 2.0f * qreal(m_textureSize.width()) / qreal(m_targetSize.width());
-            float scaleY = 2.0f * qreal(m_textureSize.height()) / qreal(m_targetSize.height());
-
-            program->setUniformValue("interpolateMapping", offsetX, offsetY, scaleX, scaleY);
-        }
-
-        return;
-    }
+static const char *qt_gl_drop_shadow_filter =
+        "uniform lowp vec4 shadowColor;"
+        "lowp vec4 customShader(lowp sampler2D src, highp vec2 srcCoords)"
+        "{"
+        "    return shadowColor * texture2D(src, srcCoords.yx).a;"
+        "}";
 
-    if (m_hints & QGraphicsBlurEffect::QualityHint) {
-        if (m_singlePass)
-            program->setUniformValue("delta", 1.0 / m_textureSize.width(), 1.0 / m_textureSize.height());
-        else if (m_horizontalBlur)
-            program->setUniformValue("delta", 1.0 / m_textureSize.width(), 0.0);
-        else
-            program->setUniformValue("delta", 0.0, 1.0 / m_textureSize.height());
-    } else {
-        qreal blur = radius() / qreal(m_cachedRadius);
-
-        if (m_singlePass)
-            program->setUniformValue("delta", blur / m_textureSize.width(), blur / m_textureSize.height());
-        else if (m_horizontalBlur)
-            program->setUniformValue("delta", blur / m_textureSize.width(), 0.0);
-        else
-            program->setUniformValue("delta", 0.0, blur / m_textureSize.height());
-    }
-}
 
-static inline qreal gaussian(qreal dx, qreal sigma)
+QGLPixmapDropShadowFilter::QGLPixmapDropShadowFilter()
 {
-    return exp(-dx * dx / (2 * sigma * sigma)) / (Q_2PI * sigma * sigma);
+    setSource(qt_gl_drop_shadow_filter);
 }
 
-QByteArray QGLPixmapBlurFilter::generateGaussianShader(int radius, bool singlePass, bool dropShadow)
+bool QGLPixmapDropShadowFilter::processGL(QPainter *painter, const QPointF &pos, const QPixmap &src, const QRectF &srcRect) const
 {
-    Q_ASSERT(radius >= 1);
-
-    radius = qMin(127, radius);
-
-    static QCache<uint, QByteArray> shaderSourceCache;
-    uint key = radius | (int(singlePass) << 7) | (int(dropShadow) << 8);
-    QByteArray *cached = shaderSourceCache.object(key);
-    if (cached)
-        return *cached;
-
-    QByteArray source;
-    source.reserve(1000);
-    source.append(qt_gl_texture_sampling_helper);
-
-    source.append("uniform highp vec2      delta;\n");
-    if (dropShadow)
-        source.append("uniform mediump vec4    shadowColor;\n");
-    source.append("lowp vec4 customShader(lowp sampler2D src, highp vec2 srcCoords) {\n");
-
-    QVector<qreal> sampleOffsets;
-    QVector<qreal> weights;
-
-    QVector<qreal> gaussianComponents;
-
-    qreal sigma = radius / 1.65;
-
-    qreal sum = 0;
-    for (int i = -radius; i < radius; ++i) {
-        float value = gaussian(i, sigma);
-        gaussianComponents << value;
-        sum += value;
-    }
-
-    // normalize
-    for (int i = 0; i < gaussianComponents.size(); ++i)
-        gaussianComponents[i] /= sum;
-
-    for (int i = 0; i < gaussianComponents.size() - 1; i += 2) {
-        qreal weight = gaussianComponents.at(i) + gaussianComponents.at(i + 1);
-        qreal offset = i - radius + gaussianComponents.at(i + 1) / weight;
-
-        sampleOffsets << offset;
-        weights << weight;
-    }
-
-    int limit = sampleOffsets.size();
-    if (singlePass)
-        limit *= limit;
-
-    QByteArray baseCoordinate = "srcCoords";
-
-    for (int i = 0; i < limit; ++i) {
-        QByteArray coordinate = baseCoordinate;
-
-        qreal weight;
-        if (singlePass) {
-            const int xIndex = i % sampleOffsets.size();
-            const int yIndex = i / sampleOffsets.size();
-
-            const qreal deltaX = sampleOffsets.at(xIndex);
-            const qreal deltaY = sampleOffsets.at(yIndex);
-            weight = weights.at(xIndex) * weights.at(yIndex);
-
-            if (!qFuzzyCompare(deltaX, deltaY)) {
-                coordinate.append(" + vec2(delta.x * float(");
-                coordinate.append(QByteArray::number(deltaX));
-                coordinate.append("), delta.y * float(");
-                coordinate.append(QByteArray::number(deltaY));
-                coordinate.append("))");
-            } else if (!qFuzzyIsNull(deltaX)) {
-                coordinate.append(" + delta * float(");
-                coordinate.append(QByteArray::number(deltaX));
-                coordinate.append(")");
-            }
-        } else {
-            const qreal delta = sampleOffsets.at(i);
-            weight = weights.at(i);
-            if (!qFuzzyIsNull(delta)) {
-                coordinate.append(" + delta * float(");
-                coordinate.append(QByteArray::number(delta));
-                coordinate.append(")");
-            }
-        }
-
-        if (i == 0) {
-            if (dropShadow)
-                source.append("    mediump float sample = ");
-            else
-                source.append("    mediump vec4 sample = ");
-        } else {
-            if (dropShadow)
-                source.append("    sample += ");
-            else
-                source.append("    sample += ");
-        }
+    QGLPixmapDropShadowFilter *filter = const_cast<QGLPixmapDropShadowFilter *>(this);
 
-        source.append("texture2D(src, ");
-        source.append(coordinate);
-        source.append(")");
+    qreal r = blurRadius();
+    QRectF targetRectUnaligned = QRectF(src.rect()).translated(pos + offset()).adjusted(-r, -r, r, r);
+    QRect targetRect = targetRectUnaligned.toAlignedRect();
 
-        if (dropShadow)
-            source.append(".a");
+    // ensure even dimensions (going to divide by two)
+    targetRect.setWidth((targetRect.width() + 1) & ~1);
+    targetRect.setHeight((targetRect.height() + 1) & ~1);
 
-        if (!qFuzzyCompare(weight, qreal(1))) {
-            source.append(" * float(");
-            source.append(QByteArray::number(weight));
-            source.append(");\n");
-        } else {
-            source.append(";\n");
-        }
-    }
+    QGLContext *ctx = const_cast<QGLContext *>(QGLContext::currentContext());
+    QGLBlurTextureCache *blurTextureCache = QGLBlurTextureCache::cacheForContext(ctx);
 
-    source.append("    return ");
-    if (dropShadow)
-        source.append("shadowColor * ");
-    source.append("sample;\n");
-    source.append("}\n");
+    QGLBlurTextureInfo *info = blurTextureCache->takeBlurTextureInfo(src);
+    if (!info || info->radius() != r) {
+        QImage half = qt_halfScaled(src.toImage().alphaChannel());
 
-    cached = new QByteArray(source);
-    shaderSourceCache.insert(key, cached);
+        qreal rx = r + targetRect.left() - targetRectUnaligned.left();
+        qreal ry = r + targetRect.top() - targetRectUnaligned.top();
 
-    return source;
-}
+        QImage image = QImage(targetRect.size() / 2, QImage::Format_Indexed8);
+        image.setColorTable(half.colorTable());
+        image.fill(0);
+        int dx = qRound(rx * qreal(0.5));
+        int dy = qRound(ry * qreal(0.5));
+        qt_rectcopy(image.bits(), half.bits(), dx, dy,
+                    half.width(), half.height(),
+                    image.bytesPerLine(), half.bytesPerLine());
 
-QGLPixmapDropShadowFilter::QGLPixmapDropShadowFilter(QGraphicsBlurEffect::BlurHints hints)
-    : m_haveCached(false)
-    , m_cachedRadius(0)
-    , m_hints(hints)
-{
-}
+        qt_blurImage(image, r * qreal(0.5), false, 1);
 
-bool QGLPixmapDropShadowFilter::processGL(QPainter *painter, const QPointF &pos, const QPixmap &src, const QRectF &srcRect) const
-{
-    QGLPixmapDropShadowFilter *filter = const_cast<QGLPixmapDropShadowFilter *>(this);
+        GLuint texture = generateBlurTexture(image.size(), GL_ALPHA);
 
-    int actualRadius = qRound(blurRadius());
-    int filterRadius = actualRadius;
-    m_singlePass = filterRadius <= 3;
+        glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, image.width(), image.height(), GL_ALPHA,
+                        GL_UNSIGNED_BYTE, image.bits());
 
-    if (!m_haveCached || filterRadius != m_cachedRadius) {
-        // Only regenerate the shader from source if parameters have changed.
-        m_haveCached = true;
-        m_cachedRadius = filterRadius;
-        QByteArray source = QGLPixmapBlurFilter::generateGaussianShader(filterRadius, m_singlePass, true);
-        filter->setSource(source);
+        info = new QGLBlurTextureInfo(image, texture, r);
     }
 
-    QRect targetRect = QRectF(src.rect()).translated(pos + offset()).adjusted(-actualRadius, -actualRadius, actualRadius, actualRadius).toAlignedRect();
-
-    if (m_singlePass) {
-        // prepare for updateUniforms
-        m_textureSize = src.size();
-
-        painter->save();
-        // ensure GL_LINEAR filtering is used
-        painter->setRenderHint(QPainter::SmoothPixmapTransform);
-        filter->setOnPainter(painter);
-        QBrush pixmapBrush = src;
-        pixmapBrush.setTransform(QTransform::fromTranslate(pos.x() + offset().x(), pos.y() + offset().y()));
-        painter->fillRect(targetRect, pixmapBrush);
-        filter->removeFromPainter(painter);
-        painter->restore();
-    } else {
-        QGLFramebufferObjectFormat format;
-        format.setInternalTextureFormat(GLenum(src.hasAlphaChannel() ? GL_RGBA : GL_RGB));
-        QGLFramebufferObject *fbo = qgl_fbo_pool()->acquire(targetRect.size(), format);
-
-        if (!fbo)
-            return false;
-
-        // prepare for updateUniforms
-        m_textureSize = src.size();
-
-        // horizontal pass, to pixmap
-        m_horizontalBlur = true;
-
-        QPainter fboPainter(fbo);
+    GLuint texture = info->texture();
 
-        glClearColor(0, 0, 0, 0);
-        glClear(GL_COLOR_BUFFER_BIT);
-
-        // ensure GL_LINEAR filtering is used
-        fboPainter.setRenderHint(QPainter::SmoothPixmapTransform);
-        fboPainter.setCompositionMode(QPainter::CompositionMode_Source);
-        filter->setOnPainter(&fboPainter);
-        QBrush pixmapBrush = src;
-        pixmapBrush.setTransform(QTransform::fromTranslate(actualRadius, actualRadius));
-        fboPainter.fillRect(QRect(0, 0, targetRect.width(), targetRect.height()), pixmapBrush);
-        filter->removeFromPainter(&fboPainter);
-        fboPainter.end();
-
-        QGL2PaintEngineEx *engine = static_cast<QGL2PaintEngineEx *>(painter->paintEngine());
+    filter->setOnPainter(painter);
 
-        // vertical pass, to painter
-        m_horizontalBlur = false;
-        m_textureSize = fbo->size();
+    QGL2PaintEngineEx *engine = static_cast<QGL2PaintEngineEx *>(painter->paintEngine());
+    painter->setRenderHint(QPainter::SmoothPixmapTransform);
 
-        painter->save();
-        // ensure GL_LINEAR filtering is used
-        painter->setRenderHint(QPainter::SmoothPixmapTransform);
-        filter->setOnPainter(painter);
-        engine->drawTexture(targetRect, fbo->texture(), fbo->size(), QRectF(0, fbo->height() - targetRect.height(), targetRect.width(), targetRect.height()));
-        filter->removeFromPainter(painter);
-        painter->restore();
+    engine->drawTexture(targetRect, texture, info->paddedImage().size(), info->paddedImage().rect());
 
-        qgl_fbo_pool()->release(fbo);
-    }
+    filter->removeFromPainter(painter);
 
     // Now draw the actual pixmap over the top.
     painter->drawPixmap(pos, src, srcRect);
 
+    blurTextureCache->insertBlurTextureInfo(src, info);
+
     return true;
 }
 
 void QGLPixmapDropShadowFilter::setUniforms(QGLShaderProgram *program)
 {
-    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
-    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
-
     QColor col = color();
-    if (m_horizontalBlur && !m_singlePass) {
-        program->setUniformValue("shadowColor", 1.0f, 1.0f, 1.0f, 1.0f);
-    } else {
-        qreal alpha = col.alphaF();
-        program->setUniformValue("shadowColor", col.redF() * alpha,
-                                                col.greenF() * alpha,
-                                                col.blueF() * alpha,
-                                                alpha);
-    }
-
-    if (m_hints & QGraphicsBlurEffect::QualityHint) {
-        if (m_singlePass)
-            program->setUniformValue("delta", 1.0 / m_textureSize.width(), 1.0 / m_textureSize.height());
-        else if (m_horizontalBlur)
-            program->setUniformValue("delta", 1.0 / m_textureSize.width(), 0.0);
-        else
-            program->setUniformValue("delta", 0.0, 1.0 / m_textureSize.height());
-    } else {
-        qreal blur = blurRadius() / qreal(m_cachedRadius);
-
-        if (m_singlePass)
-            program->setUniformValue("delta", blur / m_textureSize.width(), blur / m_textureSize.height());
-        else if (m_horizontalBlur)
-            program->setUniformValue("delta", blur / m_textureSize.width(), 0.0);
-        else
-            program->setUniformValue("delta", 0.0, blur / m_textureSize.height());
-    }
+    qreal alpha = col.alphaF();
+    program->setUniformValue("shadowColor", col.redF() * alpha,
+                                            col.greenF() * alpha,
+                                            col.blueF() * alpha,
+                                            alpha);
 }
 
 QT_END_NAMESPACE
diff --git a/src/opengl/qglshaderprogram.cpp b/src/opengl/qglshaderprogram.cpp
index b4191dc..f9737a56 100644
--- a/src/opengl/qglshaderprogram.cpp
+++ b/src/opengl/qglshaderprogram.cpp
@@ -2275,6 +2275,42 @@ void QGLShaderProgram::setUniformValue(const char *name, const QMatrix4x4& value
     \overload
 
     Sets the uniform variable at \a location in the current context
+    to a 2x2 matrix \a value.  The matrix elements must be specified
+    in column-major order.
+
+    \sa setAttributeValue()
+    \since 4.6.2
+*/
+void QGLShaderProgram::setUniformValue(int location, const GLfloat value[2][2])
+{
+    Q_D(QGLShaderProgram);
+    Q_UNUSED(d);
+    if (location != -1)
+        glUniformMatrix2fv(location, 1, GL_FALSE, value[0]);
+}
+
+/*!
+    \overload
+
+    Sets the uniform variable at \a location in the current context
+    to a 3x3 matrix \a value.  The matrix elements must be specified
+    in column-major order.
+
+    \sa setAttributeValue()
+    \since 4.6.2
+*/
+void QGLShaderProgram::setUniformValue(int location, const GLfloat value[3][3])
+{
+    Q_D(QGLShaderProgram);
+    Q_UNUSED(d);
+    if (location != -1)
+        glUniformMatrix3fv(location, 1, GL_FALSE, value[0]);
+}
+
+/*!
+    \overload
+
+    Sets the uniform variable at \a location in the current context
     to a 4x4 matrix \a value.  The matrix elements must be specified
     in column-major order.
 
@@ -2288,6 +2324,37 @@ void QGLShaderProgram::setUniformValue(int location, const GLfloat value[4][4])
         glUniformMatrix4fv(location, 1, GL_FALSE, value[0]);
 }
 
+
+/*!
+    \overload
+
+    Sets the uniform variable called \a name in the current context
+    to a 2x2 matrix \a value.  The matrix elements must be specified
+    in column-major order.
+
+    \sa setAttributeValue()
+    \since 4.6.2
+*/
+void QGLShaderProgram::setUniformValue(const char *name, const GLfloat value[2][2])
+{
+    setUniformValue(uniformLocation(name), value);
+}
+
+/*!
+    \overload
+
+    Sets the uniform variable called \a name in the current context
+    to a 3x3 matrix \a value.  The matrix elements must be specified
+    in column-major order.
+
+    \sa setAttributeValue()
+    \since 4.6.2
+*/
+void QGLShaderProgram::setUniformValue(const char *name, const GLfloat value[3][3])
+{
+    setUniformValue(uniformLocation(name), value);
+}
+
 /*!
     \overload
 
diff --git a/src/opengl/qglshaderprogram.h b/src/opengl/qglshaderprogram.h
index deeaee2..4eb80dd 100644
--- a/src/opengl/qglshaderprogram.h
+++ b/src/opengl/qglshaderprogram.h
@@ -216,6 +216,8 @@ public:
     void setUniformValue(int location, const QMatrix4x2& value);
     void setUniformValue(int location, const QMatrix4x3& value);
     void setUniformValue(int location, const QMatrix4x4& value);
+    void setUniformValue(int location, const GLfloat value[2][2]);
+    void setUniformValue(int location, const GLfloat value[3][3]);
     void setUniformValue(int location, const GLfloat value[4][4]);
     void setUniformValue(int location, const QTransform& value);
 
@@ -242,6 +244,8 @@ public:
     void setUniformValue(const char *name, const QMatrix4x2& value);
     void setUniformValue(const char *name, const QMatrix4x3& value);
     void setUniformValue(const char *name, const QMatrix4x4& value);
+    void setUniformValue(const char *name, const GLfloat value[2][2]);
+    void setUniformValue(const char *name, const GLfloat value[3][3]);
     void setUniformValue(const char *name, const GLfloat value[4][4]);
     void setUniformValue(const char *name, const QTransform& value);
 
diff --git a/src/opengl/qpixmapdata_gl.cpp b/src/opengl/qpixmapdata_gl.cpp
index 4e1d50d..92c990b 100644
--- a/src/opengl/qpixmapdata_gl.cpp
+++ b/src/opengl/qpixmapdata_gl.cpp
@@ -341,22 +341,11 @@ void QGLPixmapData::ensureCreated() const
 
     if (!m_source.isNull()) {
         if (external_format == GL_RGB) {
-            QImage tx = m_source.convertToFormat(QImage::Format_RGB32);
-
-            QVector<uchar> pixelData(w * h * 3);
-            uchar *p = &pixelData[0];
-            QRgb *src = (QRgb *)tx.bits();
-
-            for (int i = 0; i < w * h; ++i) {
-                *p++ = qRed(*src);
-                *p++ = qGreen(*src);
-                *p++ = qBlue(*src);
-                ++src;
-            }
+            const QImage tx = m_source.convertToFormat(QImage::Format_RGB888);
 
             glBindTexture(target, m_texture.id);
             glTexSubImage2D(target, 0, 0, 0, w, h, external_format,
-                            GL_UNSIGNED_BYTE, &pixelData[0]);
+                            GL_UNSIGNED_BYTE, tx.bits());
         } else {
             const QImage tx = ctx->d_func()->convertToGLFormat(m_source, true, external_format);