gpu: Add async pixel transfer interface, stub and tests.

gpu/command_buffer/service/texture_manager.h

 // Copyright (c) 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 GPU_COMMAND_BUFFER_SERVICE_TEXTURE_MANAGER_H_
 #define GPU_COMMAND_BUFFER_SERVICE_TEXTURE_MANAGER_H_
 
 #include <string>
 #include <vector>
 #include "base/basictypes.h"
 #include "base/hash_tables.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "gpu/command_buffer/service/feature_info.h"
 #include "gpu/command_buffer/service/gl_utils.h"
 #include "gpu/gpu_export.h"
+#include "ui/gl/async_pixel_transfer_delegate.h"
 #include "ui/gl/gl_image.h"
 
 namespace gpu {
 namespace gles2 {
 
 class GLES2Decoder;
 class Display;
 class TextureDefinition;
 class MemoryTracker;
 class MemoryTypeTracker;
@@ skipping 141 matching lines @@
     }
 
     void SetStreamTexture(bool stream_texture) {
       stream_texture_ = stream_texture;
     }
 
     int IsStreamTexture() {
       return stream_texture_;
     }
 
+    gfx::AsyncPixelTransferState* AsyncTransferState() {
+      DCHECK(service_id_ != 0);
+      if (!async_transfer_state_)
+          async_transfer_state_ =
+              gfx::AsyncPixelTransferDelegate::Get()->
+                  CreatePixelTransferState(service_id_);
+      return async_transfer_state_.get();
+    }
+
     void SetImmutable(bool immutable) {
       immutable_ = immutable;
     }
 
     bool IsImmutable() {
       return immutable_;
     }
 
     // Whether a particular level/face is cleared.
     bool IsLevelCleared(GLenum target, GLint level);
@@ skipping 142 matching lines @@
     // The number of framebuffers this texture is attached to.
     int framebuffer_attachment_count_;
 
     // Whether the associated context group owns this texture and should delete
     // it.
     bool owned_;
 
     // Whether this is a special streaming texture.
     bool stream_texture_;
 
+    // State to facilitate async transfers on this texture.
+    scoped_refptr<gfx::AsyncPixelTransferState> async_transfer_state_;
+
     // Whether the texture is immutable and no further changes to the format
     // or dimensions of the texture object can be made.
     bool immutable_;
 
     // Size in bytes this texture is assumed to take in memory.
     uint32 estimated_size_;
 
     DISALLOW_COPY_AND_ASSIGN(TextureInfo);
   };
 
@@ skipping 216 matching lines @@
   // The default textures for each target (texture name = 0)
   TextureInfo::Ref default_textures_[kNumDefaultTextures];
 
   DISALLOW_COPY_AND_ASSIGN(TextureManager);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_TEXTURE_MANAGER_H_