1/*
2 * Copyright (C) 2008, 2011, 2012, 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. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include "CSSValue.h"
29#include "FloatSizeHash.h"
30#include <wtf/HashCountedSet.h>
31
32namespace WebCore {
33
34class CachedImage;
35class CachedResourceLoader;
36class GeneratedImage;
37class Image;
38class RenderElement;
39
40struct ResourceLoaderOptions;
41
42class CSSImageGeneratorValue : public CSSValue {
43public:
44 ~CSSImageGeneratorValue();
45
46 void addClient(RenderElement&);
47 void removeClient(RenderElement&);
48 const HashCountedSet<RenderElement*>& clients() const { return m_clients; }
49
50 RefPtr<Image> image(RenderElement&, const FloatSize&);
51
52 bool isFixedSize() const;
53 FloatSize fixedSize(const RenderElement&);
54
55 bool isPending() const;
56 bool knownToBeOpaque(const RenderElement&) const;
57
58 void loadSubimages(CachedResourceLoader&, const ResourceLoaderOptions&);
59
60protected:
61 CSSImageGeneratorValue(ClassType);
62
63 GeneratedImage* cachedImageForSize(FloatSize);
64 void saveCachedImageForSize(FloatSize, GeneratedImage&);
65
66 // Helper functions for Crossfade and Filter.
67 static CachedImage* cachedImageForCSSValue(CSSValue&, CachedResourceLoader&, const ResourceLoaderOptions&);
68 static bool subimageIsPending(const CSSValue&);
69
70private:
71 class CachedGeneratedImage;
72
73 void evictCachedGeneratedImage(FloatSize);
74
75 HashCountedSet<RenderElement*> m_clients;
76 HashMap<FloatSize, std::unique_ptr<CachedGeneratedImage>> m_images;
77};
78
79} // namespace WebCore
80
81SPECIALIZE_TYPE_TRAITS_CSS_VALUE(CSSImageGeneratorValue, isImageGeneratorValue())
82