diff options
Diffstat (limited to 'chromium/cc/resources/layer_updater.h')
-rw-r--r-- | chromium/cc/resources/layer_updater.h | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/chromium/cc/resources/layer_updater.h b/chromium/cc/resources/layer_updater.h new file mode 100644 index 00000000000..5d8eb89ad4e --- /dev/null +++ b/chromium/cc/resources/layer_updater.h @@ -0,0 +1,73 @@ +// 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_ |