llimagetga.h
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- /**
- * @file llimagetga.h
- * @brief Image implementation to compresses and decompressed TGA files.
- *
- * $LicenseInfo:firstyear=2001&license=viewergpl$
- *
- * 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_LLIMAGETGA_H
- #define LL_LLIMAGETGA_H
- #include "llimage.h"
- // This class compresses and decompressed TGA (targa) files
- class LLImageTGA : public LLImageFormatted
- {
- protected:
- virtual ~LLImageTGA();
-
- public:
- LLImageTGA();
- LLImageTGA(const std::string& file_name);
- /*virtual*/ std::string getExtension() { return std::string("tga"); }
- /*virtual*/ BOOL updateData();
- /*virtual*/ BOOL decode(LLImageRaw* raw_image, F32 decode_time=0.0);
- /*virtual*/ BOOL encode(const LLImageRaw* raw_image, F32 encode_time=0.0);
- BOOL decodeAndProcess(LLImageRaw* raw_image, F32 domain, F32 weight);
-
- private:
- BOOL decodeTruecolor( LLImageRaw* raw_image, BOOL rle, BOOL flipped );
- BOOL decodeTruecolorRle8( LLImageRaw* raw_image );
- BOOL decodeTruecolorRle15( LLImageRaw* raw_image );
- BOOL decodeTruecolorRle24( LLImageRaw* raw_image );
- BOOL decodeTruecolorRle32( LLImageRaw* raw_image, BOOL &alpha_opaque );
- void decodeTruecolorPixel15( U8* dst, const U8* src );
- BOOL decodeTruecolorNonRle( LLImageRaw* raw_image, BOOL &alpha_opaque );
-
- BOOL decodeColorMap( LLImageRaw* raw_image, BOOL rle, BOOL flipped );
- void decodeColorMapPixel8(U8* dst, const U8* src);
- void decodeColorMapPixel15(U8* dst, const U8* src);
- void decodeColorMapPixel24(U8* dst, const U8* src);
- void decodeColorMapPixel32(U8* dst, const U8* src);
- bool loadFile(const std::string& file_name);
-
- private:
- // Class specific data
- U32 mDataOffset; // Offset from start of data to the actual header.
- // Data from header
- U8 mIDLength; // Length of identifier string
- U8 mColorMapType; // 0 = No Map
- U8 mImageType; // Supported: 2 = Uncompressed true color, 3 = uncompressed monochrome without colormap
- U8 mColorMapIndexLo; // First color map entry (low order byte)
- U8 mColorMapIndexHi; // First color map entry (high order byte)
- U8 mColorMapLengthLo; // Color map length (low order byte)
- U8 mColorMapLengthHi; // Color map length (high order byte)
- U8 mColorMapDepth; // Size of color map entry (15, 16, 24, or 32 bits)
- U8 mXOffsetLo; // X offset of image (low order byte)
- U8 mXOffsetHi; // X offset of image (hi order byte)
- U8 mYOffsetLo; // Y offset of image (low order byte)
- U8 mYOffsetHi; // Y offset of image (hi order byte)
- U8 mWidthLo; // Width (low order byte)
- U8 mWidthHi; // Width (hi order byte)
- U8 mHeightLo; // Height (low order byte)
- U8 mHeightHi; // Height (hi order byte)
- U8 mPixelSize; // 8, 16, 24, 32 bits per pixel
- U8 mAttributeBits; // 4 bits: number of attributes per pixel
- U8 mOriginRightBit; // 1 bit: origin, 0 = left, 1 = right
- U8 mOriginTopBit; // 1 bit: origin, 0 = bottom, 1 = top
- U8 mInterleave; // 2 bits: interleaved flag, 0 = none, 1 = interleaved 2, 2 = interleaved 4
- U8* mColorMap;
- S32 mColorMapStart;
- S32 mColorMapLength;
- S32 mColorMapBytesPerEntry;
- BOOL mIs15Bit;
- static const U8 s5to8bits[32];
- };
- #endif