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/**
* @file llimagejpeg.h
* @brief This class compresses and decompresses JPEG files
*
* $LicenseInfo:firstyear=2002&license=viewergpl$
*
* Copyright (c) 2002-2008, 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
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