| // Copyright 2011 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_LAYER_UPDATER_H_ |
| #define CC_RESOURCES_LAYER_UPDATER_H_ |
| |
| #include "base/memory/ref_counted.h" |
| #include "base/memory/scoped_ptr.h" |
| #include "cc/base/cc_export.h" |
| #include "ui/gfx/rect.h" |
| #include "ui/gfx/vector2d.h" |
| |
| namespace cc { |
| |
| class PrioritizedResource; |
| class PrioritizedResourceManager; |
| class ResourceUpdateQueue; |
| class TextureManager; |
| |
| class CC_EXPORT LayerUpdater : public base::RefCounted<LayerUpdater> { |
| public: |
| // Allows updaters to store per-resource update properties. |
| class CC_EXPORT Resource { |
| public: |
| virtual ~Resource(); |
| |
| PrioritizedResource* texture() { return texture_.get(); } |
| // TODO(reveman): partial_update should be a property of this class |
| // instead of an argument passed to Update(). |
| virtual void Update(ResourceUpdateQueue* queue, |
| gfx::Rect source_rect, |
| gfx::Vector2d dest_offset, |
| bool partial_update) = 0; |
| protected: |
| explicit Resource(scoped_ptr<PrioritizedResource> texture); |
| |
| private: |
| scoped_ptr<PrioritizedResource> texture_; |
| |
| DISALLOW_COPY_AND_ASSIGN(Resource); |
| }; |
| |
| LayerUpdater() {} |
| |
| virtual scoped_ptr<Resource> CreateResource( |
| PrioritizedResourceManager* manager) = 0; |
| // The |resulting_opaque_rect| gives back a region of the layer that was |
| // painted opaque. If the layer is marked opaque in the updater, then this |
| // region should be ignored in preference for the entire layer's area. |
| virtual void PrepareToUpdate(gfx::Rect content_rect, |
| gfx::Size tile_size, |
| float contents_width_scale, |
| float contents_height_scale, |
| gfx::Rect* resulting_opaque_rect) {} |
| virtual void ReduceMemoryUsage() {} |
| |
| // Set true by the layer when it is known that the entire output is going to |
| // be opaque. |
| virtual void SetOpaque(bool opaque) {} |
| |
| protected: |
| virtual ~LayerUpdater() {} |
| |
| private: |
| friend class base::RefCounted<LayerUpdater>; |
| |
| DISALLOW_COPY_AND_ASSIGN(LayerUpdater); |
| }; |
| |
| } // namespace cc |
| |
| #endif // CC_RESOURCES_LAYER_UPDATER_H_ |