2 * Copyright (C) 2008 Apple Inc. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
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
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11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
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15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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27 #include "CSSImageGeneratorValue.h"
31 #include "IntSizeHash.h"
32 #include "PlatformString.h"
33 #include "RenderObject.h"
34 #include "StyleGeneratedImage.h"
38 CSSImageGeneratorValue::CSSImageGeneratorValue()
39 : m_accessedImage(false)
43 CSSImageGeneratorValue::~CSSImageGeneratorValue()
47 void CSSImageGeneratorValue::addClient(RenderObject* renderer, const IntSize& size)
53 RenderObjectSizeCountMap::iterator it = m_clients.find(renderer);
54 if (it == m_clients.end())
55 m_clients.add(renderer, SizeCountPair(size, 1));
57 SizeCountPair& sizeCount = it->second;
62 void CSSImageGeneratorValue::removeClient(RenderObject* renderer)
64 RenderObjectSizeCountMap::iterator it = m_clients.find(renderer);
65 ASSERT(it != m_clients.end());
67 SizeCountPair& sizeCount = it->second;
68 IntSize size = sizeCount.first;
69 if (!size.isEmpty()) {
71 if (!m_sizes.contains(size))
72 m_images.remove(size);
75 if (!--sizeCount.second)
76 m_clients.remove(renderer);
81 Image* CSSImageGeneratorValue::getImage(RenderObject* renderer, const IntSize& size)
83 RenderObjectSizeCountMap::iterator it = m_clients.find(renderer);
84 ASSERT(it != m_clients.end());
86 SizeCountPair& sizeCount = it->second;
87 IntSize oldSize = sizeCount.first;
88 if (oldSize != size) {
89 // If renderer is the only client, make sure we don't delete this.
90 RefPtr<CSSImageGeneratorValue> protect(this);
91 removeClient(renderer);
92 addClient(renderer, size);
95 // Don't generate an image for empty sizes.
99 // Look up the image in our cache.
100 return m_images.get(size).get();
103 void CSSImageGeneratorValue::putImage(const IntSize& size, PassRefPtr<Image> image)
105 m_images.add(size, image);
108 StyleGeneratedImage* CSSImageGeneratorValue::generatedImage()
110 if (!m_accessedImage) {
111 m_accessedImage = true;
112 m_image = StyleGeneratedImage::create(this, isFixedSize());
114 return m_image.get();
117 } // namespace WebCore