| // 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_LAYER_UPDATER_H_ |
| #define CC_LAYER_UPDATER_H_ |
| |
| #include "base/memory/ref_counted.h" |
| #include "cc/cc_export.h" |
| #include "cc/prioritized_resource.h" |
| #include "third_party/khronos/GLES2/gl2.h" |
| |
| namespace gfx { |
| class Rect; |
| class Vector2d; |
| } |
| |
| namespace cc { |
| |
| class TextureManager; |
| struct RenderingStats; |
| class ResourceUpdateQueue; |
| |
| 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 m_texture.get(); } |
| void swapTextureWith(scoped_ptr<PrioritizedResource>& texture) { m_texture.swap(texture); } |
| // TODO(reveman): partialUpdate should be a property of this class |
| // instead of an argument passed to update(). |
| virtual void update(ResourceUpdateQueue&, const gfx::Rect& sourceRect, const gfx::Vector2d& destOffset, bool partialUpdate, RenderingStats&) = 0; |
| protected: |
| explicit Resource(scoped_ptr<PrioritizedResource> texture); |
| |
| private: |
| scoped_ptr<PrioritizedResource> m_texture; |
| }; |
| |
| LayerUpdater() { } |
| |
| virtual scoped_ptr<Resource> createResource(PrioritizedResourceManager*) = 0; |
| // The |resultingOpaqueRect| 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(const gfx::Rect& contentRect, const gfx::Size& tileSize, float contentsWidthScale, float contentsHeightScale, gfx::Rect& resultingOpaqueRect, RenderingStats&) { } |
| |
| // Set true by the layer when it is known that the entire output is going to be opaque. |
| virtual void setOpaque(bool) { } |
| |
| protected: |
| virtual ~LayerUpdater() { } |
| |
| private: |
| friend class base::RefCounted<LayerUpdater>; |
| }; |
| |
| } // namespace cc |
| |
| #endif // CC_LAYER_UPDATER_H_ |