| // Copyright 2012 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_LAYERS_CONTENT_LAYER_CLIENT_H_ |
| #define CC_LAYERS_CONTENT_LAYER_CLIENT_H_ |
| |
| #include <stddef.h> |
| |
| #include "cc/cc_export.h" |
| #include "cc/paint/display_item_list.h" |
| |
| namespace gfx { |
| class Rect; |
| } |
| |
| namespace cc { |
| |
| class CC_EXPORT ContentLayerClient { |
| public: |
| enum PaintingControlSetting { |
| PAINTING_BEHAVIOR_NORMAL, |
| PAINTING_BEHAVIOR_NORMAL_FOR_TEST, |
| DISPLAY_LIST_CONSTRUCTION_DISABLED, |
| DISPLAY_LIST_CACHING_DISABLED, |
| DISPLAY_LIST_PAINTING_DISABLED, |
| SUBSEQUENCE_CACHING_DISABLED, |
| PARTIAL_INVALIDATION, |
| }; |
| |
| // The paintable region is the rectangular region, within the bounds of the |
| // layer this client paints, that the client is capable of painting via |
| // paintContents(). Calling paintContents() will return a DisplayItemList |
| // that is guaranteed valid only within this region. |
| virtual gfx::Rect PaintableRegion() = 0; |
| |
| // Paints the content area for the layer, typically dirty rects submitted |
| // to the layer itself, into a DisplayItemList that it returns. The |
| // PaintingControlSetting enum controls painting to isolate different |
| // components in performance tests. |
| virtual scoped_refptr<DisplayItemList> PaintContentsToDisplayList( |
| PaintingControlSetting painting_control) = 0; |
| |
| // If true the layer may skip clearing the background before rasterizing, |
| // because it will cover any uncleared data with content. |
| virtual bool FillsBoundsCompletely() const = 0; |
| |
| // Returns an estimate of the current memory usage within this object, |
| // excluding memory shared with painting artifacts (i.e., |
| // DisplayItemList). Should be invoked after PaintContentsToDisplayList, |
| // so that the result includes data cached internally during painting. |
| virtual size_t GetApproximateUnsharedMemoryUsage() const = 0; |
| |
| protected: |
| virtual ~ContentLayerClient() {} |
| }; |
| |
| } // namespace cc |
| |
| #endif // CC_LAYERS_CONTENT_LAYER_CLIENT_H_ |