Add a DrawWindowUnderlay() to match DrawWindowOverlay()

gfx/layers/ipc/CompositorParent.cpp

@@ -42,6 +42,7 @@
 #include "ShadowLayersParent.h"
 #include "LayerManagerOGL.h"
 #include "nsIWidget.h"
+#include "nsGkAtoms.h"
 
 #if defined(MOZ_WIDGET_ANDROID)
 #include "AndroidBridge.h"
@@ -192,6 +193,12 @@ CompositorParent::Composite()
 #endif
   layer->AsShadowLayer()->SetShadowTransform(worldTransform);
 
+  // Hang the transform of the root layer off the layer manager.
+  gfx3DMatrix transform = layer->GetTransform();
+  transform *= worldTransform;
+  TransformLayerUserData* transformUserData = new TransformLayerUserData(transform);
+  mLayerManager->SetUserData(nsGkAtoms::transform, transformUserData);
+
   mLayerManager->EndEmptyTransaction();
   mLastCompose = mozilla::TimeStamp::Now();
 }
@@ -206,7 +213,7 @@ CompositorParent::GetPrimaryScrollableLayer()
 
   nsTArray<Layer*> queue;
   queue.AppendElement(root);
-  for (int i = 0; i < queue.Length(); i++) {
+  for (unsigned i = 0; i < queue.Length(); i++) {
     ContainerLayer* containerLayer = queue[i]->AsContainerLayer();
     if (!containerLayer) {
       continue;

gfx/layers/ipc/CompositorParent.h

@@ -140,6 +140,14 @@ private:
   DISALLOW_EVIL_CONSTRUCTORS(CompositorParent);
 };
 
+class TransformLayerUserData : public LayerUserData {
+public:
+    gfx3DMatrix matrix;
+
+    TransformLayerUserData(gfx3DMatrix& aMatrix) : matrix(aMatrix) {}
+    virtual ~TransformLayerUserData() {}
+};
+
 } // layers
 } // mozilla
 

gfx/layers/opengl/LayerManagerOGL.cpp

@@ -785,10 +785,14 @@ LayerManagerOGL::Render()
   mGLContext->fClearColor(1.0, 1.0, 1.0, 0.0);
   mGLContext->fClear(LOCAL_GL_COLOR_BUFFER_BIT | LOCAL_GL_DEPTH_BUFFER_BIT);
 
+  // Allow widget to render a custom background.
+  mWidget->DrawWindowUnderlay(this, rect);
+
   // Render our layers.
   RootLayer()->RenderLayer(mGLContext->IsDoubleBuffered() ? 0 : mBackBufferFBO,
                            nsIntPoint(0, 0));
 
+  // Allow widget to render a custom foreground too.
   mWidget->DrawWindowOverlay(this, rect);
 
   if (mTarget) {
@@ -801,8 +805,6 @@ LayerManagerOGL::Render()
     mFPS.DrawFPS(mGLContext, GetCopy2DProgram());
   }
 
-  PerformPostRenderHook();
-
   if (mGLContext->IsDoubleBuffered()) {
     mGLContext->SwapBuffers();
     LayerManager::PostPresent();
@@ -894,22 +896,6 @@ LayerManagerOGL::Render()
   mGLContext->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, 0);
 }
 
-void
-LayerManagerOGL::PerformPreRenderHook()
-{
-#ifdef MOZ_WIDGET_ANDROID
-  // TODO: AndroidBridge::PerformPreRenderHook();
-#endif
-}
-
-void
-LayerManagerOGL::PerformPostRenderHook()
-{
-#ifdef MOZ_WIDGET_ANDROID
-  // TODO: AndroidBridge::PerformPostRenderHook();
-#endif
-}
-
 void
 LayerManagerOGL::SetWorldTransform(const gfxMatrix& aMatrix)
 {

gfx/layers/opengl/LayerManagerOGL.h

@@ -387,9 +387,6 @@ public:
    * to a window of the given dimensions.
    */
   void SetupPipeline(int aWidth, int aHeight, WorldTransforPolicy aTransformPolicy);
- 
-  void PerformPreRenderHook();
-  void PerformPostRenderHook();
 
   /**
    * Setup World transform matrix.

widget/android/nsWindow.cpp

@@ -2385,3 +2385,15 @@ nsWindow::GetIMEUpdatePreference()
     return nsIMEUpdatePreference(true, true);
 }
 
+#ifdef MOZ_JAVA_COMPOSITOR
+void
+nsWindow::DrawWindowUnderlay(LayerManager* aManager, nsIntRect aRect) {
+    __android_log_print(ANDROID_LOG_ERROR, "Gecko", "### TODO: Render custom background");
+}
+
+void
+nsWindow::DrawWindowOverlay(LayerManager* aManager, nsIntRect aRect) {
+    __android_log_print(ANDROID_LOG_ERROR, "Gecko", "### TODO: Render custom foreground");
+}
+#endif
+

widget/android/nsWindow.h

@@ -179,6 +179,9 @@ public:
 #ifdef MOZ_JAVA_COMPOSITOR
     static void BindToTexture();
     static bool HasDirectTexture();
+
+    virtual void DrawWindowUnderlay(LayerManager* aManager, nsIntRect aRect);
+    virtual void DrawWindowOverlay(LayerManager* aManager, nsIntRect aRect);
 #endif
 
 protected:

widget/nsIWidget.h

@@ -1071,6 +1071,14 @@ class nsIWidget : public nsISupports {
                                           LayerManagerPersistence aPersistence = LAYER_MANAGER_CURRENT,
                                           bool* aAllowRetaining = nsnull) = 0;
 
+    /**
+     * Called before the LayerManager draws the layer tree.
+     *
+     * @param aManager The drawing LayerManager.
+     * @param aWidgetRect The current widget rect that is being drawn.
+     */
+    virtual void DrawWindowUnderlay(LayerManager* aManager, nsIntRect aRect) = 0;
+
     /**
      * Called after the LayerManager draws the layer tree
      *

widget/xpwidgets/nsBaseWidget.h

@@ -132,6 +132,7 @@ public:
                                           bool* aAllowRetaining = nsnull);
 
   virtual void            CreateCompositor();
+  virtual void            DrawWindowUnderlay(LayerManager* aManager, nsIntRect aRect) {}
   virtual void            DrawWindowOverlay(LayerManager* aManager, nsIntRect aRect) {}
   virtual void            UpdateThemeGeometries(const nsTArray<ThemeGeometry>& aThemeGeometries) {}
   virtual gfxASurface*    GetThebesSurface();