/* * 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. */ #pragma once #include "ScalableImageDecoder.h" #include <stdio.h> // Needed by jpeglib.h for FILE. // ICU defines TRUE and FALSE macros, breaking libjpeg v9 headers #undef TRUE #undef FALSE extern "C" { #include "jpeglib.h" } namespace WebCore { class JPEGImageReader; // This class decodes the JPEG image format. class JPEGImageDecoder final : public ScalableImageDecoder { public: static Ref<ScalableImageDecoder> create(AlphaOption alphaOption, GammaAndColorProfileOption gammaAndColorProfileOption) { return adoptRef(*new JPEGImageDecoder(alphaOption, gammaAndColorProfileOption)); } virtual ~JPEGImageDecoder(); // ScalableImageDecoder String filenameExtension() const override { return "jpg"_s; } ScalableImageDecoderFrame* frameBufferAtIndex(size_t index) override; // CAUTION: setFailed() deletes |m_reader|. Be careful to avoid // accessing deleted memory, especially when calling this from inside // JPEGImageReader! bool setFailed() override; bool outputScanlines(); void jpegComplete(); void setOrientation(ImageOrientation orientation) { m_orientation = orientation; } private: JPEGImageDecoder(AlphaOption, GammaAndColorProfileOption); void tryDecodeSize(bool allDataReceived) override { decode(true, allDataReceived); } // 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, bool allDataReceived); template <J_COLOR_SPACE colorSpace> bool outputScanlines(ScalableImageDecoderFrame& buffer); template <J_COLOR_SPACE colorSpace, bool isScaled> bool outputScanlines(ScalableImageDecoderFrame& buffer); std::unique_ptr<JPEGImageReader> m_reader; }; } // namespace WebCore