93 lines
3.0 KiB
C++
93 lines
3.0 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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* $LicenseInfo:firstyear=2002&license=viewergpl$
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*
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* Copyright (c) 2002-2009, Linden Research, Inc.
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*
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* Second Life Viewer Source Code
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* The source code in this file ("Source Code") is provided by Linden Lab
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* to you under the terms of the GNU General Public License, version 2.0
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* ("GPL"), unless you have obtained a separate licensing agreement
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* ("Other License"), formally executed by you and Linden Lab. Terms of
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* the GPL can be found in doc/GPL-license.txt in this distribution, or
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* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
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*
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* There are special exceptions to the terms and conditions of the GPL as
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* it is applied to this Source Code. View the full text of the exception
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* in the file doc/FLOSS-exception.txt in this software distribution, or
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* online at
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* http://secondlifegrid.net/programs/open_source/licensing/flossexception
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*
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* By copying, modifying or distributing this software, you acknowledge
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* that you have read and understood your obligations described above,
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* and agree to abide by those obligations.
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*
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* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
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* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
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* COMPLETENESS OR PERFORMANCE.
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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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extern "C" {
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#ifdef LL_STANDALONE
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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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static BOOL decompress(LLImageJPEG* imagep);
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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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