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/**
* @file llimagej2c.h
* @brief Image implmenation for jpeg2000.
*
* $LicenseInfo:firstyear=2001&license=viewergpl$
*
* Copyright (c) 2001-2008, 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_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();
static std::string getEngineInfo();
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;
BOOL mReversible;
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,
BOOL reversible=FALSE) = 0;
friend class LLImageJ2C;
};
#define LINDEN_J2C_COMMENT_PREFIX "LL_"
#endif
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