| /* |
| * Copyright (C) 2011 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef WebContentLayerClient_h |
| #define WebContentLayerClient_h |
| |
| #include "WebCommon.h" |
| |
| namespace gfx { |
| class Rect; |
| } |
| |
| namespace blink { |
| |
| struct WebRect; |
| class WebDisplayItemList; |
| |
| class BLINK_PLATFORM_EXPORT WebContentLayerClient { |
| public: |
| enum PaintingControlSetting { |
| PaintDefaultBehavior, |
| DisplayListConstructionDisabled, |
| DisplayListCachingDisabled, |
| DisplayListPaintingDisabled |
| }; |
| |
| // 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 WebDisplayitemList that is guaranteed valid |
| // only within this region. |
| // In particular, this is used to represent the interest rect in Blink. |
| virtual gfx::Rect paintableRegion() = 0; |
| |
| // Paints the content area for the layer, typically dirty rects submitted |
| // through WebContentLayer::setNeedsDisplayInRect, submitting drawing commands |
| // to populate the WebDisplayItemList. |
| // The |PaintingControlSetting| enum controls painting to isolate different components in performance tests. |
| // Currently the DisplayListConstructionDisabled does nothing. |
| virtual void paintContents( |
| WebDisplayItemList*, |
| PaintingControlSetting = PaintDefaultBehavior) = 0; |
| |
| // Returns an estimate of the current memory usage within this object, |
| // excluding memory shared with painting artifacts (i.e., |
| // WebDisplayItemList). Should be invoked after paintContents, so that the |
| // result includes data cached internally during painting. |
| virtual size_t approximateUnsharedMemoryUsage() const { return 0; } |
| |
| protected: |
| virtual ~WebContentLayerClient() { } |
| }; |
| |
| } // namespace blink |
| |
| #endif // WebContentLayerClient_h |