Layers implementation in GL.

- add textures management code for layers in TilesManager
- add the layers drawing GL code
- modify BaseLayerAndroid::drawGL() to paint the layers
- modify TexturesGenerator to process layers painting requests
Note: some further refactoring (when getting rid of SkLayer as a base
class) will let us remove some redudant function, e.g.
setAnchorPoint/setAnchorPointZ (bug:3292285)

Change-Id: I3cc88575f331104d45c89e84ba27f3af755aa845

1 files changed, 4 insertions, 2 deletions

diff --git a/WebCore/platform/graphics/android/BackedDoubleBufferedTexture.h b/WebCore/platform/graphics/android/BackedDoubleBufferedTexture.h
index 4ffdc07..844715d 100644
--- a/WebCore/platform/graphics/android/BackedDoubleBufferedTexture.h
+++ b/WebCore/platform/graphics/android/BackedDoubleBufferedTexture.h
@@ -53,7 +53,7 @@ public:
 
     // updates the texture with current bitmap and releases (and if needed also
     // swaps) the texture.
-    void producerUpdate(TextureInfo* textureInfo);
+    virtual void producerUpdate(TextureInfo* textureInfo);
 
     // The level can be one of the following values:
     //  * -1 for an unused texture.
@@ -68,7 +68,9 @@ public:
     // returns false if ownership cannot be transferred because the tile is busy
     bool acquire(TextureOwner* owner);
     void release(TextureOwner* owner);
-    void release();
+
+    // set the texture owner if not busy. Return false if busy, true otherwise.
+    bool setOwner(TextureOwner* owner);
 
     // private member accessor functions
     TextureOwner* owner() { return m_owner; } // only used by the consumer thread