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/**
* @file llimagej2c.h
* @brief Image implmenation for jpeg2000.
*
* Copyright (c) 2001-$CurrentYear$, Linden Research, Inc.
* $License$
*/
#ifndef LL_LLIMAGEJ2C_H
#define LL_LLIMAGEJ2C_H
#include "llimage.h"
#include "llassettype.h"
class LLImageJ2CImpl;
class LLImageJ2C : public LLImageFormatted
{
protected:
virtual ~LLImageJ2C();
public:
LLImageJ2C();
// Base class overrides
/*virtual*/ BOOL updateData();
/*virtual*/ BOOL decode(LLImageRaw *raw_imagep, F32 decode_time=0.0);
/*virtual*/ BOOL decode(LLImageRaw *raw_imagep, F32 decode_time, S32 first_channel, S32 max_channel_count);
/*virtual*/ BOOL encode(const LLImageRaw *raw_imagep, F32 encode_time=0.0);
/*virtual*/ S32 calcHeaderSize();
/*virtual*/ S32 calcDataSize(S32 discard_level = 0);
/*virtual*/ S32 calcDiscardLevelBytes(S32 bytes);
/*virtual*/ S8 getRawDiscardLevel();
// Encode with comment text
BOOL encode(const LLImageRaw *raw_imagep, const char* comment_text, F32 encode_time=0.0);
BOOL validate(U8 *data, U32 file_size);
BOOL loadAndValidate(const LLString &filename);
// Encode accessors
void setReversible(const BOOL reversible); // Use non-lossy?
void setRate(F32 rate);
void setMaxBytes(S32 max_bytes);
S32 getMaxBytes() const { return mMaxBytes; }
static S32 calcHeaderSizeJ2C();
static S32 calcDataSizeJ2C(S32 w, S32 h, S32 comp, S32 discard_level, F32 rate = 0.f);
static void openDSO();
static void closeDSO();
protected:
friend class LLImageJ2CImpl;
friend class LLImageJ2COJ;
friend class LLImageJ2CKDU;
void decodeFailed();
void updateRawDiscardLevel();
S32 mMaxBytes; // Maximum number of bytes of data to use...
S8 mRawDiscardLevel;
F32 mRate;
LLImageJ2CImpl *mImpl;
};
// Derive from this class to implement JPEG2000 decoding
class LLImageJ2CImpl
{
public:
virtual ~LLImageJ2CImpl();
protected:
// Find out the image size and number of channels.
// Return value:
// true: image size and number of channels was determined
// false: error on decode
virtual BOOL getMetadata(LLImageJ2C &base) = 0;
// Decode the raw image optionally aborting (to continue later) after
// decode_time seconds. Decode at most max_channel_count and start
// decoding channel first_channel.
// Return value:
// true: decoding complete (even if it failed)
// false: time expired while decoding
virtual BOOL decodeImpl(LLImageJ2C &base, LLImageRaw &raw_image, F32 decode_time, S32 first_channel, S32 max_channel_count) = 0;
virtual BOOL encodeImpl(LLImageJ2C &base, const LLImageRaw &raw_image, const char* comment_text, F32 encode_time=0.0) = 0;
friend class LLImageJ2C;
};
#define LINDEN_J2C_COMMENT_PREFIX "LL_"
#endif
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