diff options
Diffstat (limited to 'WebCore/platform/image-decoders/bmp/BMPImageDecoder.h')
| -rw-r--r-- | WebCore/platform/image-decoders/bmp/BMPImageDecoder.h | 91 |
1 files changed, 65 insertions, 26 deletions
diff --git a/WebCore/platform/image-decoders/bmp/BMPImageDecoder.h b/WebCore/platform/image-decoders/bmp/BMPImageDecoder.h index a2d4b25..c793585 100644 --- a/WebCore/platform/image-decoders/bmp/BMPImageDecoder.h +++ b/WebCore/platform/image-decoders/bmp/BMPImageDecoder.h @@ -1,46 +1,85 @@ /* - * Copyright (C) 2006 Apple Computer, Inc. All rights reserved. - * + * Copyright (c) 2008, 2009, Google Inc. All rights reserved. + * * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY - * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR - * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, - * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, - * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR - * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY - * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef BMPImageDecoder_h #define BMPImageDecoder_h -#include "ImageDecoder.h" +#include "BMPImageReader.h" +#include <wtf/OwnPtr.h> namespace WebCore { - class BMPImageReader; - // This class decodes the BMP image format. class BMPImageDecoder : public ImageDecoder { public: + BMPImageDecoder(); + + // ImageDecoder virtual String filenameExtension() const { return "bmp"; } + virtual void setData(SharedBuffer*, bool allDataReceived); + virtual bool isSizeAvailable(); + virtual RGBA32Buffer* frameBufferAtIndex(size_t index); - // Whether or not the size information has been decoded yet. - virtual bool isSizeAvailable() const; + private: + inline uint32_t readUint32(int offset) const + { + return BMPImageReader::readUint32(m_data.get(), + m_decodedOffset + offset); + } - virtual RGBA32Buffer* frameBufferAtIndex(size_t index); + // Decodes the image. If |onlySize| is true, stops decoding after + // calculating the image size. If decoding fails but there is no more + // data coming, sets the "decode failure" flag. + void decodeWithCheckForDataEnded(bool onlySize); + + // Decodes the image. If |onlySize| is true, stops decoding after + // calculating the image size. Returns whether decoding succeeded. + // NOTE: Used internally by decodeWithCheckForDataEnded(). Other people + // should not call this. + bool decode(bool onlySize); + + // Processes the file header at the beginning of the data. Sets + // |*imgDataOffset| based on the header contents. Returns true if the + // file header could be decoded. + bool processFileHeader(size_t* imgDataOffset); + + // True if we've seen all the data. + bool m_allDataReceived; + + // An index into |m_data| representing how much we've already decoded. + // Note that this only tracks data _this_ class decodes; once the + // BMPImageReader takes over this will not be updated further. + size_t m_decodedOffset; + + // The reader used to do most of the BMP decoding. + OwnPtr<BMPImageReader> m_reader; }; } // namespace WebCore |