Imported existing code

indra/llimage/llimagejpeg.h

@@ -0,0 +1,92 @@
+/** 
+ * @file llimagejpeg.h
+ * @brief This class compresses and decompresses JPEG files
+ *
+ * $LicenseInfo:firstyear=2002&license=viewergpl$
+ * 
+ * Copyright (c) 2002-2009, 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_LLIMAGEJPEG_H
+#define LL_LLIMAGEJPEG_H
+
+#include <csetjmp>
+
+#include "llimage.h"
+
+extern "C" {
+#ifdef LL_STANDALONE
+# include <jpeglib.h>
+# include <jerror.h>
+#else
+# include "jpeglib/jpeglib.h"
+# include "jpeglib/jerror.h"
+#endif
+}
+
+class LLImageJPEG : public LLImageFormatted
+{
+protected:
+	virtual ~LLImageJPEG();
+	
+public:
+	LLImageJPEG(S32 quality = 75);
+
+	/*virtual*/ std::string getExtension() { return std::string("jpg"); }
+	/*virtual*/ BOOL updateData();
+	/*virtual*/ BOOL decode(LLImageRaw* raw_image, F32 decode_time);
+	/*virtual*/ BOOL encode(const LLImageRaw* raw_image, F32 encode_time);
+
+	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
+private:
+	static jmp_buf	sSetjmpBuffer;		// To allow the library to abort.
+};
+
+#endif  // LL_LLIMAGEJPEG_H