Refactoring for merging ManagedTileState into Tile.

cc/resources/tile_draw_info.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_TILE_DRAW_INFO_H_
+#define CC_RESOURCES_TILE_DRAW_INFO_H_
+
+#include "base/debug/trace_event_argument.h"
+#include "base/memory/scoped_ptr.h"
+#include "cc/resources/platform_color.h"
+#include "cc/resources/resource_provider.h"
+#include "cc/resources/scoped_resource.h"
+#include "cc/resources/tile_task_runner.h"
+
+namespace cc {
+
+// This class holds all the state relevant to drawing a tile.
+class CC_EXPORT TileDrawInfo {
+ public:
+  enum Mode { RESOURCE_MODE, SOLID_COLOR_MODE, PICTURE_PILE_MODE };
+
+  TileDrawInfo();
+  ~TileDrawInfo();
+
+  Mode mode() const { return mode_; }
+
+  bool IsReadyToDraw() const;
+
+  ResourceProvider::ResourceId get_resource_id() const {
+    DCHECK(mode_ == RESOURCE_MODE);
+    DCHECK(resource_);
+
+    return resource_->id();
+  }
+
+  SkColor get_solid_color() const {
+    DCHECK(mode_ == SOLID_COLOR_MODE);
+
+    return solid_color_;
+  }
+
+  bool contents_swizzled() const {
+    DCHECK(resource_);
+    return !PlatformColor::SameComponentOrder(resource_->format());
+  }
+
+  bool requires_resource() const {
+    return mode_ == RESOURCE_MODE || mode_ == PICTURE_PILE_MODE;
+  }
+
+  inline bool has_resource() const { return !!resource_; }
+
+  void SetSolidColorForTesting(SkColor color) { set_solid_color(color); }
+  void SetResourceForTesting(scoped_ptr<ScopedResource> resource) {
+    resource_ = resource.Pass();
+  }
+
+  void AsValueInto(base::debug::TracedValue* state) const;
+
+ private:
+  friend class Tile;
+  friend class TileManager;
+
+  void set_use_resource() { mode_ = RESOURCE_MODE; }
+
+  void set_solid_color(const SkColor& color) {
+    mode_ = SOLID_COLOR_MODE;
+    solid_color_ = color;
+  }
+
+  void set_rasterize_on_demand() { mode_ = PICTURE_PILE_MODE; }
+
+  Mode mode_;
+  SkColor solid_color_;
+  scoped_ptr<ScopedResource> resource_;
+};
+
+}  // namespace cc
+
+#endif  // CC_RESOURCES_TILE_DRAW_INFO_H_