/** * @file llimagejpeg.h * @brief This class compresses and decompresses JPEG files * * $LicenseInfo:firstyear=2002&license=viewerlgpl$ * Second Life Viewer Source Code * Copyright (C) 2010, Linden Research, Inc. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; * version 2.1 of the License only. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA * $/LicenseInfo$ */ #ifndef LL_LLIMAGEJPEG_H #define LL_LLIMAGEJPEG_H #include <csetjmp> #include "llimage.h" #include "llwin32headerslean.h" extern "C" { #ifdef LL_USESYSTEMLIBS # include <jpeglib.h> # include <jerror.h> #else # include "jpeglib/jpeglib.h" # include "jpeglib/jerror.h" #endif } class LLImageJPEG : public LLImageFormatted { protected: virtual ~LLImageJPEG(); public: LLImageJPEG(S32 quality = 75); /*virtual*/ std::string getExtension() { return std::string("jpg"); } /*virtual*/ BOOL updateData(); /*virtual*/ BOOL decode(LLImageRaw* raw_image, F32 decode_time); /*virtual*/ BOOL encode(const LLImageRaw* raw_image, F32 encode_time); void setEncodeQuality( S32 q ) { mEncodeQuality = q; } // on a scale from 1 to 100 S32 getEncodeQuality() { return mEncodeQuality; } // Callbacks registered with jpeglib static void encodeInitDestination ( j_compress_ptr cinfo ); static boolean encodeEmptyOutputBuffer(j_compress_ptr cinfo); static void encodeTermDestination(j_compress_ptr cinfo); static void decodeInitSource(j_decompress_ptr cinfo); static boolean decodeFillInputBuffer(j_decompress_ptr cinfo); static void decodeSkipInputData(j_decompress_ptr cinfo, long num_bytes); static void decodeTermSource(j_decompress_ptr cinfo); static void errorExit(j_common_ptr cinfo); static void errorEmitMessage(j_common_ptr cinfo, int msg_level); static void errorOutputMessage(j_common_ptr cinfo); static BOOL decompress(LLImageJPEG* imagep); protected: U8* mOutputBuffer; // temp buffer used during encoding S32 mOutputBufferSize; // bytes in mOuputBuffer S32 mEncodeQuality; // on a scale from 1 to 100 private: static jmp_buf sSetjmpBuffer; // To allow the library to abort. }; #endif // LL_LLIMAGEJPEG_H