/** * @file llimagetga.h * @brief Image implementation to compresses and decompressed TGA files. * * $LicenseInfo:firstyear=2001&license=viewergpl$ * * 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_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