cc: Hide Gpu Rasterization details in Resource Provider.

cc/resources/resource_provider.h

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_RESOURCES_RESOURCE_PROVIDER_H_
 #define CC_RESOURCES_RESOURCE_PROVIDER_H_
 
 #include <deque>
 #include <set>
 #include <string>
@@ skipping 288 matching lines @@
 
    private:
     ResourceProvider* resource_provider_;
     ResourceProvider::ResourceId resource_id_;
     SkBitmap sk_bitmap_;
     scoped_ptr<SkCanvas> sk_canvas_;
 
     DISALLOW_COPY_AND_ASSIGN(ScopedWriteLockSoftware);
   };
 
+  // The following class is needed to modify GL resources using GPU
+  // raster. The user must ensure that they only use GPU raster on
+  // GL resources while an instance of this class is alive.
+  class CC_EXPORT ScopedGpuRaster {
+   public:
+    ScopedGpuRaster(ResourceProvider* resource_provider);
+    ~ScopedGpuRaster();
+
+   private:
+    ResourceProvider* resource_provider_;
+
+    DISALLOW_COPY_AND_ASSIGN(ScopedGpuRaster);
+  };
+
   class Fence : public base::RefCounted<Fence> {
    public:
     Fence() {}
     virtual bool HasPassed() = 0;
 
    protected:
     friend class base::RefCounted<Fence>;
     virtual ~Fence() {}
 
    private:
@@ skipping 301 matching lines @@
   // specified filter for both minification and magnification. Returns the
   // texture target used. The resource must be locked for reading.
   GLenum BindForSampling(ResourceProvider::ResourceId resource_id,
                          GLenum unit,
                          GLenum filter);
 
   // Returns NULL if the output_surface_ does not have a ContextProvider.
   gpu::gles2::GLES2Interface* ContextGL() const;
   class GrContext* GrContext() const;
 
+  void BeginGpuRaster();
+  void EndGpuRaster();
+
   OutputSurface* output_surface_;
   SharedBitmapManager* shared_bitmap_manager_;
   bool lost_output_surface_;
   int highp_threshold_min_;
   ResourceId next_id_;
   ResourceMap resources_;
   int next_child_;
   ChildMap children_;
 
   ResourceType default_resource_type_;
@@ skipping 62 matching lines @@
   return format_gl_data_format[format];
 }
 
 inline GLenum GLInternalFormat(ResourceFormat format) {
   return GLDataFormat(format);
 }
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_RESOURCE_PROVIDER_H_