/* * Copyright (C) 2006 Apple Inc. All rights reserved. * Copyright (C) 2008-2009 Torch Mobile, Inc. * * 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 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 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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef JPEGImageDecoder_h #define JPEGImageDecoder_h #include "ImageDecoder.h" #include <stdio.h> // Needed by jpeglib.h for FILE. #include <wtf/OwnPtr.h> #if OS(WINCE) // Remove warning: 'FAR' macro redefinition #undef FAR // jmorecfg.h in libjpeg checks for XMD_H with the comment: "X11/xmd.h correctly defines INT32" // fix INT32 redefinition error by pretending we are X11/xmd.h #define XMD_H #endif extern "C" { #include "jpeglib.h" } namespace WebCore { class JPEGImageReader; // This class decodes the JPEG image format. class JPEGImageDecoder : public ImageDecoder { public: JPEGImageDecoder(ImageSource::AlphaOption, ImageSource::GammaAndColorProfileOption); virtual ~JPEGImageDecoder(); // ImageDecoder virtual String filenameExtension() const { return "jpg"; } virtual bool isSizeAvailable(); virtual bool setSize(unsigned width, unsigned height); virtual ImageFrame* frameBufferAtIndex(size_t index); // CAUTION: setFailed() deletes |m_reader|. Be careful to avoid // accessing deleted memory, especially when calling this from inside // JPEGImageReader! virtual bool setFailed(); bool willDownSample() { ASSERT(ImageDecoder::isSizeAvailable()); return m_scaled; } bool outputScanlines(); void jpegComplete(); void setColorProfile(const ColorProfile& colorProfile) { m_colorProfile = colorProfile; } void setOrientation(ImageOrientation orientation) { m_orientation = orientation; } private: // 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 decode(bool onlySize); template <J_COLOR_SPACE colorSpace> bool outputScanlines(ImageFrame& buffer); template <J_COLOR_SPACE colorSpace, bool isScaled> bool outputScanlines(ImageFrame& buffer); OwnPtr<JPEGImageReader> m_reader; }; } // namespace WebCore #endif