cc: [WIP] Use worker context and OrderingBarrierCHROMIUM for one-copy.

cc/resources/resource_provider.h

Index: cc/resources/resource_provider.h
diff --git a/cc/resources/resource_provider.h b/cc/resources/resource_provider.h
index d5b57127c205db172299d6cc7048e747779e56a8..74e87f38c1eeb526e041f6c50315449753a59f7f 100644
--- a/cc/resources/resource_provider.h
+++ b/cc/resources/resource_provider.h
@@ -331,6 +331,54 @@ class CC_EXPORT ResourceProvider {
     DISALLOW_COPY_AND_ASSIGN(ScopedWriteLockGpuMemoryBuffer);
   };
 
+  class CC_EXPORT ScopedWriteLockGpuMemoryBufferForThread {
+   public:
+    ScopedWriteLockGpuMemoryBufferForThread(ResourceProvider* resource_provider,
+                                            ResourceId resource_id);
+    ~ScopedWriteLockGpuMemoryBufferForThread();
+
+    gfx::GpuMemoryBuffer* GetGpuMemoryBuffer();
+    ContextProvider* worker_context() { return worker_context_; }
+    ResourceFormat format() { return format_; }
+    gfx::Size size() { return size_; }
+
+    unsigned bound_image_id() { return bound_image_id_; }
+    void set_bound_image_id(unsigned id) { bound_image_id_ = id; }
+    unsigned image_id() { return image_id_; }
+    void set_image_id(unsigned id) { image_id_ = id; }
+    unsigned dirty_image() { return dirty_image_; }
+    void set_dirty_image(unsigned id) { dirty_image_ = id; }
+    bool allocated() { return allocated_; }
+    void set_allocated(bool status) { allocated_ = status; }
+    bool read_lock_fences_enabled() { return read_lock_fences_enabled_; }
+    void set_read_lock_fences_enabled(bool status) {
+      read_lock_fences_enabled_ = status;
+    }
+    GLenum internal_format() { return internal_format_; }
+    unsigned source_gl_id() { return source_gl_id_; }
+    unsigned dest_gl_id() { return dest_gl_id_; }
+
+   private:
+    ResourceProvider* resource_provider_;
+    ResourceProvider::Resource* resource_;
+    gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager_;
+    gfx::GpuMemoryBuffer* gpu_memory_buffer_;
+    base::ThreadChecker thread_checker_;
+    ContextProvider* worker_context_;
+    unsigned image_id_;
+    unsigned bound_image_id_;
+    bool allocated_;
+    bool dirty_image_;
+    bool read_lock_fences_enabled_;
+    unsigned source_gl_id_;
+    unsigned dest_gl_id_;

[piman, 2015/07/01 22:11:05]

These 2 fields are not initialized. For that matter, dest_gl_id_ doesn't belong
here. And source_gl_id() should really be resource_->gl_id.

[sohanjg, 2015/07/02 14:40:28]

Done.

+    gfx::Size size_;
+    ResourceFormat format_;
+    GLenum internal_format_;
+
+    DISALLOW_COPY_AND_ASSIGN(ScopedWriteLockGpuMemoryBufferForThread);
+  };
+
   class CC_EXPORT ScopedWriteLockGr {
    public:
     ScopedWriteLockGr(ResourceProvider* resource_provider,