1 /*
2 * Copyright (C) 2006 Apple Computer, Inc. All rights reserved.
3 * Copyright (C) 2007 Alp Toker <alp.toker@collabora.co.uk>
4 * Copyright (C) 2008, Google Inc. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
16 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
19 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
22 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
23 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include "config.h"
29 #include "platform/graphics/ImageSource.h"
30
31 #include "platform/graphics/DeferredImageDecoder.h"
32 #include "platform/image-decoders/ImageDecoder.h"
33
34 namespace blink {
35
ImageSource(ImageSource::AlphaOption alphaOption,ImageSource::GammaAndColorProfileOption gammaAndColorProfileOption)36 ImageSource::ImageSource(ImageSource::AlphaOption alphaOption, ImageSource::GammaAndColorProfileOption gammaAndColorProfileOption)
37 : m_alphaOption(alphaOption)
38 , m_gammaAndColorProfileOption(gammaAndColorProfileOption)
39 {
40 }
41
~ImageSource()42 ImageSource::~ImageSource()
43 {
44 }
45
clearCacheExceptFrame(size_t clearExceptFrame)46 size_t ImageSource::clearCacheExceptFrame(size_t clearExceptFrame)
47 {
48 return m_decoder ? m_decoder->clearCacheExceptFrame(clearExceptFrame) : 0;
49 }
50
initialized() const51 bool ImageSource::initialized() const
52 {
53 return m_decoder;
54 }
55
resetDecoder()56 void ImageSource::resetDecoder()
57 {
58 m_decoder.clear();
59 }
60
setData(SharedBuffer & data,bool allDataReceived)61 void ImageSource::setData(SharedBuffer& data, bool allDataReceived)
62 {
63 // Create a decoder by sniffing the encoded data. If insufficient data bytes are available to
64 // determine the encoded image type, no decoder is created.
65 if (!m_decoder)
66 m_decoder = DeferredImageDecoder::create(data, m_alphaOption, m_gammaAndColorProfileOption);
67
68 if (m_decoder)
69 m_decoder->setData(data, allDataReceived);
70 }
71
filenameExtension() const72 String ImageSource::filenameExtension() const
73 {
74 return m_decoder ? m_decoder->filenameExtension() : String();
75 }
76
isSizeAvailable()77 bool ImageSource::isSizeAvailable()
78 {
79 return m_decoder && m_decoder->isSizeAvailable();
80 }
81
hasColorProfile() const82 bool ImageSource::hasColorProfile() const
83 {
84 return m_decoder && m_decoder->hasColorProfile();
85 }
86
size(RespectImageOrientationEnum shouldRespectOrientation) const87 IntSize ImageSource::size(RespectImageOrientationEnum shouldRespectOrientation) const
88 {
89 return frameSizeAtIndex(0, shouldRespectOrientation);
90 }
91
frameSizeAtIndex(size_t index,RespectImageOrientationEnum shouldRespectOrientation) const92 IntSize ImageSource::frameSizeAtIndex(size_t index, RespectImageOrientationEnum shouldRespectOrientation) const
93 {
94 if (!m_decoder)
95 return IntSize();
96
97 IntSize size = m_decoder->frameSizeAtIndex(index);
98 if ((shouldRespectOrientation == RespectImageOrientation) && m_decoder->orientation().usesWidthAsHeight())
99 return IntSize(size.height(), size.width());
100
101 return size;
102 }
103
getHotSpot(IntPoint & hotSpot) const104 bool ImageSource::getHotSpot(IntPoint& hotSpot) const
105 {
106 return m_decoder ? m_decoder->hotSpot(hotSpot) : false;
107 }
108
repetitionCount()109 int ImageSource::repetitionCount()
110 {
111 return m_decoder ? m_decoder->repetitionCount() : cAnimationNone;
112 }
113
frameCount() const114 size_t ImageSource::frameCount() const
115 {
116 return m_decoder ? m_decoder->frameCount() : 0;
117 }
118
createFrameAtIndex(size_t index)119 PassRefPtr<NativeImageSkia> ImageSource::createFrameAtIndex(size_t index)
120 {
121 if (!m_decoder)
122 return nullptr;
123
124 ImageFrame* buffer = m_decoder->frameBufferAtIndex(index);
125 if (!buffer || buffer->status() == ImageFrame::FrameEmpty)
126 return nullptr;
127
128 // Zero-height images can cause problems for some ports. If we have an
129 // empty image dimension, just bail.
130 if (size().isEmpty())
131 return nullptr;
132
133 // Return the buffer contents as a native image. For some ports, the data
134 // is already in a native container, and this just increments its refcount.
135 return buffer->asNewNativeImage();
136 }
137
frameDurationAtIndex(size_t index) const138 float ImageSource::frameDurationAtIndex(size_t index) const
139 {
140 if (!m_decoder)
141 return 0;
142
143 // Many annoying ads specify a 0 duration to make an image flash as quickly as possible.
144 // We follow Firefox's behavior and use a duration of 100 ms for any frames that specify
145 // a duration of <= 10 ms. See <rdar://problem/7689300> and <http://webkit.org/b/36082>
146 // for more information.
147 const float duration = m_decoder->frameDurationAtIndex(index) / 1000.0f;
148 if (duration < 0.011f)
149 return 0.100f;
150 return duration;
151 }
152
orientationAtIndex(size_t) const153 ImageOrientation ImageSource::orientationAtIndex(size_t) const
154 {
155 return m_decoder ? m_decoder->orientation() : DefaultImageOrientation;
156 }
157
frameHasAlphaAtIndex(size_t index) const158 bool ImageSource::frameHasAlphaAtIndex(size_t index) const
159 {
160 return !m_decoder || m_decoder->frameHasAlphaAtIndex(index);
161 }
162
frameIsCompleteAtIndex(size_t index) const163 bool ImageSource::frameIsCompleteAtIndex(size_t index) const
164 {
165 return m_decoder && m_decoder->frameIsCompleteAtIndex(index);
166 }
167
frameBytesAtIndex(size_t index) const168 unsigned ImageSource::frameBytesAtIndex(size_t index) const
169 {
170 return m_decoder ? m_decoder->frameBytesAtIndex(index) : 0;
171 }
172
173 } // namespace blink
174