Imported existing code

indra/llimage/llimagej2c.h

@@ -0,0 +1,123 @@
+/** 
+ * @file llimagej2c.h
+ * @brief Image implmenation for jpeg2000.
+ *
+ * $LicenseInfo:firstyear=2001&license=viewergpl$
+ * 
+ * Copyright (c) 2001-2009, 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...
+	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