Bug 907926 - Make ContentClientBasic support Azure content. r=nrc

gfx/layers/ThebesLayerBuffer.cpp

@@ -277,6 +277,7 @@ ThebesLayerBuffer::DrawTo(ThebesLayer* aLayer,
     aTarget->Restore();
   } else {
     RefPtr<DrawTarget> dt = aTarget->GetDrawTarget();
+    bool clipped = false;
 
     // If the entire buffer is valid, we can just draw the whole thing,
     // no need to clip. But we'll still clip if clipping is cheap ---
@@ -292,11 +293,24 @@ ThebesLayerBuffer::DrawTo(ThebesLayer* aLayer,
       // we might sample pixels outside GetEffectiveVisibleRegion(), which is wrong
       // and may cause gray lines.
       gfxUtils::ClipToRegionSnapped(dt, aLayer->GetEffectiveVisibleRegion());
+      clipped = true;
     }
 
-    DrawBufferWithRotation(aTarget, BUFFER_BLACK, aOpacity, aMask, aMaskTransform);
-    aTarget->Restore();
-   }
+    RefPtr<SourceSurface> mask;
+    if (aMask) {
+      mask = gfxPlatform::GetPlatform()->GetSourceSurfaceForSurface(dt, aMask);
+    }
+
+    Matrix maskTransform;
+    if (aMaskTransform) {
+      maskTransform = ToMatrix(*aMaskTransform);
+    }
+
+    DrawBufferWithRotation(dt, BUFFER_BLACK, aOpacity, mask, &maskTransform);
+    if (clipped) {
+      dt->PopClip();
+    }
+  }
 }
 
 static void

gfx/layers/client/ContentClient.cpp

@@ -83,6 +83,7 @@ ContentClientBasic::CreateBuffer(ContentType aType,
                                  uint32_t aFlags,
                                  gfxASurface**)
 {
+  MOZ_ASSERT(!(aFlags & BUFFER_COMPONENT_ALPHA));
   nsRefPtr<gfxASurface> referenceSurface = GetBuffer();
   if (!referenceSurface) {
     gfxContext* defaultTarget = mManager->GetDefaultTarget();
@@ -105,9 +106,13 @@ ContentClientBasic::CreateDTBuffer(ContentType aType,
                                    uint32_t aFlags,
                                    RefPtr<DrawTarget>* aWhiteDT)
 {
-  NS_RUNTIMEABORT("ContentClientBasic does not support Moz2D drawing yet!");
-  // TODO[Bas] - Implement me!?
-  return nullptr;
+  MOZ_ASSERT(!(aFlags & BUFFER_COMPONENT_ALPHA));
+  gfxASurface::gfxImageFormat format =
+    gfxPlatform::GetPlatform()->OptimalFormatForContent(aType);
+
+  return gfxPlatform::GetPlatform()->CreateOffscreenContentDrawTarget(
+    IntSize(aRect.width, aRect.height),
+    ImageFormatToSurfaceFormat(format));
 }
 
 void

gfx/layers/client/ContentClient.h

@@ -160,6 +160,7 @@ public:
                                                        const nsIntRect& aRect,
                                                        uint32_t aFlags,
                                                        RefPtr<gfx::DrawTarget>* aWhiteDT);
+  virtual bool SupportsAzureContent() const { return true; }
 
   virtual TextureInfo GetTextureInfo() const MOZ_OVERRIDE
   {