1/*
2 * Copyright (C) 2013 Apple 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
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include "GraphicsTypes.h"
29#include "Timer.h"
30#include <wtf/HashMap.h>
31
32namespace WebCore {
33
34class GraphicsContext;
35class Image;
36class LayoutSize;
37class RenderBoxModelObject;
38class RenderView;
39class RenderStyle;
40
41class ImageQualityController {
42 WTF_MAKE_NONCOPYABLE(ImageQualityController); WTF_MAKE_FAST_ALLOCATED;
43public:
44 explicit ImageQualityController(const RenderView&);
45
46 static Optional<InterpolationQuality> interpolationQualityFromStyle(const RenderStyle&);
47 InterpolationQuality chooseInterpolationQuality(GraphicsContext&, RenderBoxModelObject*, Image&, const void* layer, const LayoutSize&);
48
49 void rendererWillBeDestroyed(RenderBoxModelObject& renderer) { removeObject(&renderer); }
50
51private:
52 typedef HashMap<const void*, LayoutSize> LayerSizeMap;
53 typedef HashMap<RenderBoxModelObject*, LayerSizeMap> ObjectLayerSizeMap;
54
55 void removeLayer(RenderBoxModelObject*, LayerSizeMap* innerMap, const void* layer);
56 void set(RenderBoxModelObject*, LayerSizeMap* innerMap, const void* layer, const LayoutSize&);
57 void highQualityRepaintTimerFired();
58 void restartTimer();
59 void removeObject(RenderBoxModelObject*);
60
61 const RenderView& m_renderView;
62 ObjectLayerSizeMap m_objectLayerSizeMap;
63 Timer m_timer;
64 bool m_animatedResizeIsActive { false };
65 bool m_liveResizeOptimizationIsActive { false };
66};
67
68} // namespace WebCore
69