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/**
* @file llimagejpeg.h
* @brief This class compresses and decompresses JPEG files
*
* Copyright (c) 2002-$CurrentYear$, Linden Research, Inc.
* $License$
*/
#ifndef LL_LLIMAGEJPEG_H
#define LL_LLIMAGEJPEG_H
#include <setjmp.h>
#include "llimage.h"
extern "C" {
#include "jpeglib/jinclude.h"
#include "jpeglib/jpeglib.h"
#include "jpeglib/jerror.h"
}
class LLImageJPEG : public LLImageFormatted
{
protected:
virtual ~LLImageJPEG();
public:
LLImageJPEG();
/*virtual*/ BOOL updateData();
/*virtual*/ BOOL decode(LLImageRaw* raw_image, F32 time=0.0);
/*virtual*/ BOOL encode(const LLImageRaw* raw_image, F32 time=0.0);
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
jmp_buf mSetjmpBuffer; // To allow the library to abort.
};
#endif // LL_LLIMAGEJPEG_H
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