1/* 2 * Copyright (C) 2013 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31#ifndef ImageQualityController_h 32#define ImageQualityController_h 33 34#include "core/rendering/RenderObject.h" 35#include "platform/geometry/IntSize.h" 36#include "platform/geometry/LayoutSize.h" 37#include "platform/graphics/Image.h" 38#include "platform/graphics/ImageOrientation.h" 39#include "platform/graphics/ImageSource.h" 40#include "wtf/HashMap.h" 41 42namespace blink { 43 44typedef HashMap<const void*, LayoutSize> LayerSizeMap; 45typedef HashMap<RenderObject*, LayerSizeMap> ObjectLayerSizeMap; 46 47class ImageQualityController FINAL { 48 WTF_MAKE_NONCOPYABLE(ImageQualityController); WTF_MAKE_FAST_ALLOCATED; 49public: 50 ~ImageQualityController(); 51 52 static ImageQualityController* imageQualityController(); 53 54 static void remove(RenderObject*); 55 56 InterpolationQuality chooseInterpolationQuality(GraphicsContext*, RenderObject*, Image*, const void* layer, const LayoutSize&); 57 58 // For testing. 59 static bool has(RenderObject*); 60 // This is public for testing. Do not call this from other classes. 61 void set(RenderObject*, LayerSizeMap* innerMap, const void* layer, const LayoutSize&); 62 63private: 64 ImageQualityController(); 65 66 bool shouldPaintAtLowQuality(GraphicsContext*, RenderObject*, Image*, const void* layer, const LayoutSize&); 67 void removeLayer(RenderObject*, LayerSizeMap* innerMap, const void* layer); 68 void objectDestroyed(RenderObject*); 69 bool isEmpty() { return m_objectLayerSizeMap.isEmpty(); } 70 71 void highQualityRepaintTimerFired(Timer<ImageQualityController>*); 72 void restartTimer(); 73 74 ObjectLayerSizeMap m_objectLayerSizeMap; 75 Timer<ImageQualityController> m_timer; 76 bool m_animatedResizeIsActive; 77 bool m_liveResizeOptimizationIsActive; 78}; 79 80} // namespace blink 81 82#endif 83