llimagej2c.h
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- /**
- * @file llimagej2c.h
- * @brief Image implmenation for jpeg2000.
- *
- * $LicenseInfo:firstyear=2001&license=viewergpl$
- *
- * Copyright (c) 2001-2010, 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_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*/ std::string getExtension() { return std::string("j2c"); }
- /*virtual*/ BOOL updateData();
- /*virtual*/ BOOL decode(LLImageRaw *raw_imagep, F32 decode_time);
- /*virtual*/ BOOL decodeChannels(LLImageRaw *raw_imagep, F32 decode_time, S32 first_channel, S32 max_channel_count);
- /*virtual*/ BOOL encode(const LLImageRaw *raw_imagep, F32 encode_time);
- /*virtual*/ S32 calcHeaderSize();
- /*virtual*/ S32 calcDataSize(S32 discard_level = 0);
- /*virtual*/ S32 calcDiscardLevelBytes(S32 bytes);
- /*virtual*/ S8 getRawDiscardLevel();
- // Override these so that we don't try to set a global variable from a DLL
- /*virtual*/ void resetLastError();
- /*virtual*/ void setLastError(const std::string& message, const std::string& filename = std::string());
-
-
- // 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 std::string &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...
-
- S32 mDataSizes[MAX_DISCARD_LEVEL+1]; // Size of data required to reach a given level
- U32 mAreaUsedForDataSizeCalcs; // Height * width used to calculate mDataSizes
- S8 mRawDiscardLevel;
- F32 mRate;
- BOOL mReversible;
- LLImageJ2CImpl *mImpl;
- std::string mLastError;
- };
- // 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