Bug 709490 - Part 6: Add frame ID to CanvasClient so compositor could update frame correctly. r=roc

--HG--
extra : rebase_source : 1c2226028988ecc166152be7d567491de149d540

gfx/layers/LayerTreeInvalidation.cpp

@@ -385,7 +385,7 @@ struct ColorLayerProperties : public LayerPropertiesBase
   IntRect mBounds;
 };
 
-static ImageHost* GetImageHost(ImageLayer* aLayer)
+static ImageHost* GetImageHost(Layer* aLayer)
 {
   LayerComposite* composite = aLayer->AsLayerComposite();
   if (composite) {
@@ -465,6 +465,34 @@ struct ImageLayerProperties : public LayerPropertiesBase
   bool mIsMask;
 };
 
+struct CanvasLayerProperties : public LayerPropertiesBase
+{
+  explicit CanvasLayerProperties(CanvasLayer* aCanvas)
+    : LayerPropertiesBase(aCanvas)
+    , mImageHost(GetImageHost(aCanvas))
+  {
+    mFrameID = mImageHost ? mImageHost->GetFrameID() : -1;
+  }
+
+  virtual nsIntRegion ComputeChangeInternal(NotifySubDocInvalidationFunc aCallback,
+                                            bool& aGeometryChanged)
+  {
+    CanvasLayer* canvasLayer = static_cast<CanvasLayer*>(mLayer.get());
+
+    ImageHost* host = GetImageHost(canvasLayer);
+    if (host && host->GetFrameID() != mFrameID) {
+      aGeometryChanged = true;
+
+      return NewTransformedBounds();
+    }
+
+    return IntRect();
+  }
+
+  nsRefPtr<ImageHost> mImageHost;
+  int32_t mFrameID;
+};
+
 UniquePtr<LayerPropertiesBase>
 CloneLayerTreePropertiesInternal(Layer* aRoot, bool aIsMask /* = false */)
 {
@@ -483,6 +511,7 @@ CloneLayerTreePropertiesInternal(Layer* aRoot, bool aIsMask /* = false */)
     case Layer::TYPE_IMAGE:
       return MakeUnique<ImageLayerProperties>(static_cast<ImageLayer*>(aRoot), aIsMask);
     case Layer::TYPE_CANVAS:
+      return MakeUnique<CanvasLayerProperties>(static_cast<CanvasLayer*>(aRoot));
     case Layer::TYPE_READBACK:
     case Layer::TYPE_SHADOW:
     case Layer::TYPE_PAINTED:

gfx/layers/client/CanvasClient.cpp

@@ -125,6 +125,7 @@ CanvasClient2D::Update(gfx::IntSize aSize, ClientCanvasLayer* aLayer)
     CompositableForwarder::TimedTextureClient* t = textures.AppendElement();
     t->mTextureClient = mBuffer;
     t->mPictureRect = nsIntRect(nsIntPoint(0, 0), mBuffer->GetSize());
+    t->mFrameID = mFrameID;
     GetForwarder()->UseTextures(this, textures);
     mBuffer->SyncWithObject(GetForwarder()->GetSyncObject());
   }
@@ -459,6 +460,7 @@ CanvasClientSharedSurface::Updated()
   CompositableForwarder::TimedTextureClient* t = textures.AppendElement();
   t->mTextureClient = mFront;
   t->mPictureRect = nsIntRect(nsIntPoint(0, 0), mFront->GetSize());
+  t->mFrameID = mFrameID;
   forwarder->UseTextures(this, textures);
 }
 

gfx/layers/client/CanvasClient.h

@@ -57,6 +57,7 @@ public:
 
   CanvasClient(CompositableForwarder* aFwd, TextureFlags aFlags)
     : CompositableClient(aFwd, aFlags)
+    , mFrameID(0)
   {
     mTextureFlags = aFlags;
   }
@@ -67,9 +68,18 @@ public:
 
   virtual void Update(gfx::IntSize aSize, ClientCanvasLayer* aLayer) = 0;
 
+  virtual bool AddTextureClient(TextureClient* aTexture) override
+  {
+    ++mFrameID;
+    return CompositableClient::AddTextureClient(aTexture);
+  }
+
   virtual void UpdateAsync(AsyncCanvasRenderer* aRenderer) {}
 
   virtual void Updated() { }
+
+protected:
+  int32_t mFrameID;
 };
 
 // Used for 2D canvases and WebGL canvas on non-GL systems where readback is requried.
@@ -97,7 +107,7 @@ public:
   virtual bool AddTextureClient(TextureClient* aTexture) override
   {
     MOZ_ASSERT((mTextureFlags & aTexture->GetFlags()) == mTextureFlags);
-    return CompositableClient::AddTextureClient(aTexture);
+    return CanvasClient::AddTextureClient(aTexture);
   }
 
   virtual void OnDetach() override