cc: Refactored Tile::GetResourceId

cc/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_MANAGED_TILE_STATE_H_
+#define CC_MANAGED_TILE_STATE_H_
+
+#include <list>
+
+#include "base/memory/scoped_ptr.h"
+#include "cc/resource_pool.h"
+#include "cc/resource_provider.h"
+#include "cc/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,
+        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(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 ||
+               mode_ == PICTURE_PILE_MODE;
+      }
+
+      scoped_ptr<ResourcePool::Resource>& GetResourceForTesting() {
+        return resource_;
+      }
+
+    private:
+      friend class TileManager;
+      friend class ManagedTileState;
+
+      void set_transparent() {
+        mode_ = TRANSPARENT_MODE;
+      }
+
+      void set_solid_color(const SkColor& color) {
+        mode_ = SOLID_COLOR_MODE;
+        solid_color_ = color;
+      }
+
+      Mode mode_;
+      SkColor solid_color_;
+
+      scoped_ptr<ResourcePool::Resource> resource_;
+      bool resource_is_being_initialized_;
+      bool can_be_freed_;
+      bool contents_swizzled_;
+  };
+
+
+  ManagedTileState();
+  ~ManagedTileState();
+  scoped_ptr<base::Value> AsValue() const;
+
+  // Persisted state: valid all the time.
+  bool can_use_gpu_memory;
+  bool need_to_gather_pixel_refs;
+  std::list<skia::LazyPixelRef*> pending_pixel_refs;
+  TileRasterState raster_state;
+  DrawingInfo drawing_info;
+  PicturePileImpl::Analysis picture_pile_analysis;
+  bool picture_pile_analyzed;
+
+  // Ephemeral state, valid only during TileManager::ManageTiles.
+  TileManagerBin bin[NUM_BIN_PRIORITIES];
+  TileManagerBin tree_bin[NUM_TREES];
+
+  // The bin that the tile would have if the GPU memory manager had
+  // a maximally permissive policy, send to the GPU memory manager
+  // 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