Implement on demand quad rasterization for PicturePiles.

cc/resources/managed_tile_state.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_RESOURCES_MANAGED_TILE_STATE_H_
 #define CC_RESOURCES_MANAGED_TILE_STATE_H_
 
 #include <list>
 
 #include "base/memory/scoped_ptr.h"
 #include "cc/resources/resource_pool.h"
 #include "cc/resources/resource_provider.h"
 #include "cc/resources/tile_manager.h"
 
 namespace cc {
 
 // This is state that is specific to a tile that is
 // managed by the TileManager.
 class CC_EXPORT ManagedTileState {
  public:
   class CC_EXPORT DrawingInfo {
     public:
       enum Mode {
-        TEXTURE_MODE,
+        RESOURCE_MODE,
         SOLID_COLOR_MODE,
         TRANSPARENT_MODE,
         PICTURE_PILE_MODE,
         NUM_MODES
       };
 
       DrawingInfo();
       ~DrawingInfo();
 
       Mode mode() const {
         return mode_;
       }
 
       bool IsReadyToDraw() const;
 
       ResourceProvider::ResourceId get_resource_id() const {
-        DCHECK(mode_ == TEXTURE_MODE);
+        DCHECK(mode_ == RESOURCE_MODE);
         DCHECK(resource_);
         DCHECK(!resource_is_being_initialized_);
         return resource_->id();
       }
 
       SkColor get_solid_color() const {
         DCHECK(mode_ == SOLID_COLOR_MODE);
 
         return solid_color_;
       }
 
       bool contents_swizzled() const {
         return contents_swizzled_;
       }
 
       bool requires_resource() const {
-        return mode_ == TEXTURE_MODE ||
+        return mode_ == RESOURCE_MODE ||
                mode_ == PICTURE_PILE_MODE;
       }
 
       scoped_ptr<ResourcePool::Resource>& GetResourceForTesting() {
         return resource_;
       }
 
     private:
       friend class TileManager;
       friend class ManagedTileState;
 
+      void set_use_resource() {
+        mode_ = RESOURCE_MODE;
+      }
+
       void set_transparent() {
         mode_ = TRANSPARENT_MODE;
       }
 
       void set_solid_color(const SkColor& color) {
         mode_ = SOLID_COLOR_MODE;
         solid_color_ = color;
       }
 
+      void set_rasterize_on_demand() {
+        mode_ = PICTURE_PILE_MODE;
+      }
+
+      void set_contents_swizzled(bool contents_swizzled) {
+        contents_swizzled_ = contents_swizzled;
+      }
+
       Mode mode_;
       SkColor solid_color_;
 
       scoped_ptr<ResourcePool::Resource> resource_;
       bool resource_is_being_initialized_;
       bool can_be_freed_;
       bool contents_swizzled_;
   };
 
 
@@ skipping 19 matching lines @@
   // to determine policy.
   TileManagerBin gpu_memmgr_stats_bin;
   TileResolution resolution;
   float time_to_needed_in_seconds;
   float distance_to_visible_in_pixels;
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_MANAGED_TILE_STATE_H_