Allow task pools to reason about transparency.

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 68 matching lines @@
     RESOURCE_TYPE_GL_TEXTURE,
     RESOURCE_TYPE_BITMAP,
   };
 
   static scoped_ptr<ResourceProvider> Create(
       OutputSurface* output_surface,
       SharedBitmapManager* shared_bitmap_manager,
       gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager,
       BlockingTaskRunner* blocking_main_thread_task_runner,
       int highp_threshold_min,
-      bool use_rgba_4444_texture_format,
       size_t id_allocation_chunk_size,
       const std::vector<unsigned>& use_image_texture_targets);
   ~ResourceProvider() override;
 
   void DidLoseOutputSurface() { lost_output_surface_ = true; }
 
   int max_texture_size() const { return max_texture_size_; }
-  ResourceFormat memory_efficient_texture_format() const {
-    return use_rgba_4444_texture_format_ ? RGBA_4444 : best_texture_format_;
-  }
   ResourceFormat best_texture_format() const { return best_texture_format_; }
   ResourceFormat best_render_buffer_format() const {
     return best_render_buffer_format_;
   }
   ResourceFormat yuv_resource_format() const { return yuv_resource_format_; }
   bool use_sync_query() const { return use_sync_query_; }
   gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager() {
     return gpu_memory_buffer_manager_;
   }
   size_t num_resources() const { return resources_.size(); }
@@ skipping 331 matching lines @@
                     base::trace_event::ProcessMemoryDump* pmd) override;
 
   int tracing_id() const { return tracing_id_; }
 
  protected:
   ResourceProvider(OutputSurface* output_surface,
                    SharedBitmapManager* shared_bitmap_manager,
                    gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager,
                    BlockingTaskRunner* blocking_main_thread_task_runner,
                    int highp_threshold_min,
-                   bool use_rgba_4444_texture_format,
                    size_t id_allocation_chunk_size,
                    const std::vector<unsigned>& use_image_texture_targets);
   void Initialize();
 
  private:
   struct Resource {
     enum Origin { INTERNAL, EXTERNAL, DELEGATED };
 
     ~Resource();
     Resource(unsigned texture_id,
@@ skipping 127 matching lines @@
   bool use_texture_usage_hint_;
   bool use_compressed_texture_etc1_;
   ResourceFormat yuv_resource_format_;
   int max_texture_size_;
   ResourceFormat best_texture_format_;
   ResourceFormat best_render_buffer_format_;
 
   base::ThreadChecker thread_checker_;
 
   scoped_refptr<Fence> current_read_lock_fence_;
-  bool use_rgba_4444_texture_format_;
 
   const size_t id_allocation_chunk_size_;
   scoped_ptr<IdAllocator> texture_id_allocator_;
   scoped_ptr<IdAllocator> buffer_id_allocator_;
 
   bool use_sync_query_;
   std::vector<unsigned> use_image_texture_targets_;
 
   // A process-unique ID used for disambiguating memory dumps from different
   // resource providers.
   int tracing_id_;
 
   DISALLOW_COPY_AND_ASSIGN(ResourceProvider);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_RESOURCE_PROVIDER_H_