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