llimagejpeg.h
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- /**
- * @file llimagejpeg.h
- * @brief This class compresses and decompresses JPEG files
- *
- * $LicenseInfo:firstyear=2002&license=viewergpl$
- *
- * Copyright (c) 2002-2010, Linden Research, Inc.
- *
- * Second Life Viewer Source Code
- * The source code in this file ("Source Code") is provided by Linden Lab
- * to you under the terms of the GNU General Public License, version 2.0
- * ("GPL"), unless you have obtained a separate licensing agreement
- * ("Other License"), formally executed by you and Linden Lab. Terms of
- * the GPL can be found in doc/GPL-license.txt in this distribution, or
- * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
- *
- * There are special exceptions to the terms and conditions of the GPL as
- * it is applied to this Source Code. View the full text of the exception
- * in the file doc/FLOSS-exception.txt in this software distribution, or
- * online at
- * http://secondlifegrid.net/programs/open_source/licensing/flossexception
- *
- * By copying, modifying or distributing this software, you acknowledge
- * that you have read and understood your obligations described above,
- * and agree to abide by those obligations.
- *
- * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
- * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
- * COMPLETENESS OR PERFORMANCE.
- * $/LicenseInfo$
- */
- #ifndef LL_LLIMAGEJPEG_H
- #define LL_LLIMAGEJPEG_H
- #include <csetjmp>
- #include "llimage.h"
- extern "C" {
- #ifdef LL_STANDALONE
- # 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