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295f920116
I wrote a script to do this which is attached to the bug. TBR=abarth@chromium.org BUG=435361 Review URL: https://codereview.chromium.org/736373003
86 lines
3.7 KiB
C++
86 lines
3.7 KiB
C++
/*
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* Copyright (c) 2008, 2009, Google Inc. All rights reserved.
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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 are
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* met:
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*
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* * 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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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY 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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#ifndef SKY_ENGINE_PLATFORM_IMAGE_DECODERS_BMP_BMPIMAGEDECODER_H_
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#define SKY_ENGINE_PLATFORM_IMAGE_DECODERS_BMP_BMPIMAGEDECODER_H_
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#include "platform/image-decoders/bmp/BMPImageReader.h"
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#include "sky/engine/wtf/OwnPtr.h"
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namespace blink {
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// This class decodes the BMP image format.
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class PLATFORM_EXPORT BMPImageDecoder : public ImageDecoder {
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public:
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BMPImageDecoder(ImageSource::AlphaOption, ImageSource::GammaAndColorProfileOption, size_t maxDecodedBytes);
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// ImageDecoder
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virtual String filenameExtension() const override { return "bmp"; }
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virtual void setData(SharedBuffer*, bool allDataReceived) override;
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virtual bool isSizeAvailable() override;
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virtual ImageFrame* frameBufferAtIndex(size_t) override;
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// CAUTION: setFailed() deletes |m_reader|. Be careful to avoid
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// accessing deleted memory, especially when calling this from inside
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// BMPImageReader!
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virtual bool setFailed() override;
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private:
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inline uint32_t readUint32(int offset) const
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{
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return BMPImageReader::readUint32(m_data.get(), m_decodedOffset + offset);
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}
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// Decodes the image. If |onlySize| is true, stops decoding after
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// calculating the image size. If decoding fails but there is no more
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// data coming, sets the "decode failure" flag.
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void decode(bool onlySize);
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// Decodes the image. If |onlySize| is true, stops decoding after
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// calculating the image size. Returns whether decoding succeeded.
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bool decodeHelper(bool onlySize);
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// Processes the file header at the beginning of the data. Sets
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// |*imgDataOffset| based on the header contents. Returns true if the
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// file header could be decoded.
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bool processFileHeader(size_t* imgDataOffset);
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// An index into |m_data| representing how much we've already decoded.
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// Note that this only tracks data _this_ class decodes; once the
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// BMPImageReader takes over this will not be updated further.
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size_t m_decodedOffset;
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// The reader used to do most of the BMP decoding.
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OwnPtr<BMPImageReader> m_reader;
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};
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} // namespace blink
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#endif // SKY_ENGINE_PLATFORM_IMAGE_DECODERS_BMP_BMPIMAGEDECODER_H_
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