Delay activation/draw on GPU tile work completion

cc/raster/raster_buffer_provider.h

 // Copyright 2013 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_RASTER_RASTER_BUFFER_PROVIDER_H_
 #define CC_RASTER_RASTER_BUFFER_PROVIDER_H_
 
 #include <stddef.h>
 
 #include "cc/playback/raster_source.h"
 #include "cc/raster/raster_buffer.h"
 #include "cc/raster/task_graph_runner.h"
 #include "cc/raster/tile_task.h"
 #include "cc/resources/resource_format.h"
+#include "cc/resources/resource_provider.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/size.h"
 
 namespace cc {
 class Resource;
 
 class CC_EXPORT RasterBufferProvider {
  public:
   RasterBufferProvider();
   virtual ~RasterBufferProvider();
@@ skipping 31 matching lines @@
   // Returns the format to use for the tiles.
   virtual ResourceFormat GetResourceFormat(bool must_support_alpha) const = 0;
 
   // Determine if the resource requires swizzling.
   virtual bool IsResourceSwizzleRequired(bool must_support_alpha) const = 0;
 
   // Determine if the RasterBufferProvider can handle partial raster into
   // the Resource provided in AcquireBufferForRaster.
   virtual bool CanPartialRasterIntoProvidedResource() const = 0;
 
+  // Returns true if the indicated resource is ready to draw.
+  virtual bool IsResourceReadyToDraw(ResourceId id) const = 0;
+
+  // Calls the provided |callback| when the provided |resources| are ready to
+  // draw. Returns a callback ID which can be used to track this callback.
+  // Will return 0 if no callback is needed (resources are already ready to
+  // draw). The caller may optionally pass the ID of a pending callback to
+  // avoid creating a new callback unnecessarily. If the caller does not
+  // have a pending callback, 0 should be passed for |pending_callback_id|.
+  virtual uint64_t SetReadyToDrawCallback(
+      const ResourceProvider::ResourceIdArray& resource_ids,
+      const base::Callback<void()>& callback,
+      uint64_t pending_callback_id) const = 0;
+
   // Shutdown for doing cleanup.
   virtual void Shutdown() = 0;
 
  protected:
   // Check if resource format matches output format.
   static bool ResourceFormatRequiresSwizzle(ResourceFormat format);
 };
 
 }  // namespace cc
 
 #endif  // CC_RASTER_RASTER_BUFFER_PROVIDER_H_