author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Thu, 27 Aug 2009 07:44:59 +0300 | |
changeset 16 | a359256acfc6 |
parent 0 | dd21522fd290 |
permissions | -rw-r--r-- |
0
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/* |
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* Copyright (C) 2006 Apple Computer, Inc. All rights reserved. |
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* Copyright (C) 2007 Alp Toker <alp.toker@collabora.co.uk> |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#include "config.h" |
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#include "ImageSource.h" |
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#include "SharedBuffer.h" |
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#if PLATFORM(CAIRO) |
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#include "GIFImageDecoder.h" |
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#include "JPEGImageDecoder.h" |
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#include "PNGImageDecoder.h" |
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#include "BMPImageDecoder.h" |
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#include "ICOImageDecoder.h" |
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#include "XBMImageDecoder.h" |
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|
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#include <cairo.h> |
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namespace WebCore { |
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|
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ImageDecoder* createDecoder(const Vector<char>& data) |
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{ |
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// We need at least 4 bytes to figure out what kind of image we're dealing with. |
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int length = data.size(); |
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if (length < 4) |
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return 0; |
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|
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const unsigned char* uContents = (const unsigned char*)data.data(); |
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const char* contents = data.data(); |
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|
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// GIFs begin with GIF8(7 or 9). |
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if (strncmp(contents, "GIF8", 4) == 0) |
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return new GIFImageDecoder(); |
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|
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// Test for PNG. |
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if (uContents[0]==0x89 && |
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uContents[1]==0x50 && |
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uContents[2]==0x4E && |
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uContents[3]==0x47) |
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return new PNGImageDecoder(); |
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|
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// JPEG |
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if (uContents[0]==0xFF && |
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uContents[1]==0xD8 && |
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uContents[2]==0xFF) |
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return new JPEGImageDecoder(); |
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|
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// BMP |
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if (strncmp(contents, "BM", 2) == 0) |
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return new BMPImageDecoder(); |
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|
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// ICOs always begin with a 2-byte 0 followed by a 2-byte 1. |
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// CURs begin with 2-byte 0 followed by 2-byte 2. |
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if (!memcmp(contents, "\000\000\001\000", 4) || |
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!memcmp(contents, "\000\000\002\000", 4)) |
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return new ICOImageDecoder(); |
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|
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// XBMs require 8 bytes of info. |
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if (length >= 8 && strncmp(contents, "#define ", 8) == 0) |
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return new XBMImageDecoder(); |
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// Give up. We don't know what the heck this is. |
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return 0; |
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} |
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|
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ImageSource::ImageSource() |
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: m_decoder(0) |
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{} |
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|
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ImageSource::~ImageSource() |
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{ |
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clear(); |
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} |
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void ImageSource::clear() |
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{ |
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delete m_decoder; |
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m_decoder = 0; |
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} |
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bool ImageSource::initialized() const |
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{ |
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return m_decoder; |
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} |
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109 |
void ImageSource::setData(SharedBuffer* data, bool allDataReceived) |
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110 |
{ |
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111 |
// Make the decoder by sniffing the bytes. |
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112 |
// This method will examine the data and instantiate an instance of the appropriate decoder plugin. |
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113 |
// If insufficient bytes are available to determine the image type, no decoder plugin will be |
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114 |
// made. |
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delete m_decoder; |
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m_decoder = createDecoder(data->buffer()); |
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if (!m_decoder) |
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118 |
return; |
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119 |
m_decoder->setData(data, allDataReceived); |
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120 |
} |
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121 |
|
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122 |
bool ImageSource::isSizeAvailable() |
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123 |
{ |
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124 |
if (!m_decoder) |
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125 |
return false; |
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126 |
|
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return m_decoder->isSizeAvailable(); |
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128 |
} |
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129 |
|
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130 |
IntSize ImageSource::size() const |
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131 |
{ |
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132 |
if (!m_decoder) |
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133 |
return IntSize(); |
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134 |
|
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135 |
return m_decoder->size(); |
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136 |
} |
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137 |
|
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138 |
int ImageSource::repetitionCount() |
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139 |
{ |
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140 |
if (!m_decoder) |
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141 |
return cAnimationNone; |
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142 |
|
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143 |
return m_decoder->repetitionCount(); |
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144 |
} |
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145 |
|
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146 |
size_t ImageSource::frameCount() const |
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147 |
{ |
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148 |
return m_decoder ? m_decoder->frameCount() : 0; |
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149 |
} |
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150 |
|
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151 |
NativeImagePtr ImageSource::createFrameAtIndex(size_t index) |
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152 |
{ |
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153 |
if (!m_decoder) |
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154 |
return 0; |
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155 |
|
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156 |
RGBA32Buffer* buffer = m_decoder->frameBufferAtIndex(index); |
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157 |
if (!buffer || buffer->status() == RGBA32Buffer::FrameEmpty) |
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158 |
return 0; |
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159 |
|
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160 |
return cairo_image_surface_create_for_data((unsigned char*)buffer->bytes().data(), |
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161 |
CAIRO_FORMAT_ARGB32, |
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162 |
size().width(), |
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163 |
buffer->height(), |
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164 |
size().width()*4); |
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165 |
} |
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166 |
|
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167 |
bool ImageSource::frameIsCompleteAtIndex(size_t index) |
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168 |
{ |
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169 |
if (!m_decoder) |
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170 |
return false; |
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|
171 |
|
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172 |
RGBA32Buffer* buffer = m_decoder->frameBufferAtIndex(index); |
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173 |
return buffer && buffer->status() == RGBA32Buffer::FrameComplete; |
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|
174 |
} |
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|
175 |
|
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176 |
float ImageSource::frameDurationAtIndex(size_t index) |
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177 |
{ |
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178 |
if (!m_decoder) |
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179 |
return 0; |
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|
180 |
|
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181 |
RGBA32Buffer* buffer = m_decoder->frameBufferAtIndex(index); |
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182 |
if (!buffer || buffer->status() == RGBA32Buffer::FrameEmpty) |
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183 |
return 0; |
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|
184 |
|
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185 |
// Many annoying ads specify a 0 duration to make an image flash as quickly |
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186 |
// as possible. We follow WinIE's behavior and use a duration of 100 ms |
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187 |
// for any frames that specify a duration of <= 50 ms. See |
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Revision: 200911
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|
188 |
// <http://bugs.webkit.org/show_bug.cgi?id=14413> or Radar 4051389 for |
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189 |
// more. |
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190 |
const float duration = buffer->duration() / 1000.0f; |
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191 |
return (duration < 0.051f) ? 0.100f : duration; |
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|
192 |
} |
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|
193 |
|
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194 |
bool ImageSource::frameHasAlphaAtIndex(size_t index) |
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195 |
{ |
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196 |
if (!m_decoder || !m_decoder->supportsAlpha()) |
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|
197 |
return false; |
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|
198 |
|
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199 |
RGBA32Buffer* buffer = m_decoder->frameBufferAtIndex(index); |
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200 |
if (!buffer || buffer->status() == RGBA32Buffer::FrameEmpty) |
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|
201 |
return false; |
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|
202 |
|
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|
203 |
return buffer->hasAlpha(); |
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204 |
} |
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|
205 |
|
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|
206 |
} |
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|
207 |
|
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|
208 |
#endif // PLATFORM(CAIRO) |