115 lines
4.2 KiB
C++
115 lines
4.2 KiB
C++
/**
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* @file llimagetga.h
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* @brief Image implementation to compresses and decompressed TGA files.
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*
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* $LicenseInfo:firstyear=2001&license=viewergpl$
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*
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* Copyright (c) 2001-2009, Linden Research, Inc.
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*
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* Second Life Viewer Source Code
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* The source code in this file ("Source Code") is provided by Linden Lab
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* to you under the terms of the GNU General Public License, version 2.0
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* ("GPL"), unless you have obtained a separate licensing agreement
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* ("Other License"), formally executed by you and Linden Lab. Terms of
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* the GPL can be found in doc/GPL-license.txt in this distribution, or
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* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
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*
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* There are special exceptions to the terms and conditions of the GPL as
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* it is applied to this Source Code. View the full text of the exception
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* in the file doc/FLOSS-exception.txt in this software distribution, or
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* online at
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* http://secondlifegrid.net/programs/open_source/licensing/flossexception
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*
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* By copying, modifying or distributing this software, you acknowledge
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* that you have read and understood your obligations described above,
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* and agree to abide by those obligations.
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*
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* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
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* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
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* COMPLETENESS OR PERFORMANCE.
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* $/LicenseInfo$
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*/
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#ifndef LL_LLIMAGETGA_H
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#define LL_LLIMAGETGA_H
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#include "llimage.h"
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// This class compresses and decompressed TGA (targa) files
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class LLImageTGA : public LLImageFormatted
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{
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protected:
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virtual ~LLImageTGA();
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public:
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LLImageTGA();
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LLImageTGA(const std::string& file_name);
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/*virtual*/ std::string getExtension() { return std::string("tga"); }
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/*virtual*/ BOOL updateData();
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/*virtual*/ BOOL decode(LLImageRaw* raw_image, F32 decode_time=0.0);
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/*virtual*/ BOOL encode(const LLImageRaw* raw_image, F32 encode_time=0.0);
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BOOL decodeAndProcess(LLImageRaw* raw_image, F32 domain, F32 weight);
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private:
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BOOL decodeTruecolor( LLImageRaw* raw_image, BOOL rle, BOOL flipped );
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BOOL decodeTruecolorRle8( LLImageRaw* raw_image );
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BOOL decodeTruecolorRle15( LLImageRaw* raw_image );
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BOOL decodeTruecolorRle24( LLImageRaw* raw_image );
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BOOL decodeTruecolorRle32( LLImageRaw* raw_image, BOOL &alpha_opaque );
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void decodeTruecolorPixel15( U8* dst, const U8* src );
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BOOL decodeTruecolorNonRle( LLImageRaw* raw_image, BOOL &alpha_opaque );
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BOOL decodeColorMap( LLImageRaw* raw_image, BOOL rle, BOOL flipped );
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void decodeColorMapPixel8(U8* dst, const U8* src);
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void decodeColorMapPixel15(U8* dst, const U8* src);
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void decodeColorMapPixel24(U8* dst, const U8* src);
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void decodeColorMapPixel32(U8* dst, const U8* src);
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bool loadFile(const std::string& file_name);
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private:
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// Class specific data
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U32 mDataOffset; // Offset from start of data to the actual header.
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// Data from header
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U8 mIDLength; // Length of identifier string
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U8 mColorMapType; // 0 = No Map
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U8 mImageType; // Supported: 2 = Uncompressed true color, 3 = uncompressed monochrome without colormap
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U8 mColorMapIndexLo; // First color map entry (low order byte)
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U8 mColorMapIndexHi; // First color map entry (high order byte)
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U8 mColorMapLengthLo; // Color map length (low order byte)
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U8 mColorMapLengthHi; // Color map length (high order byte)
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U8 mColorMapDepth; // Size of color map entry (15, 16, 24, or 32 bits)
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U8 mXOffsetLo; // X offset of image (low order byte)
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U8 mXOffsetHi; // X offset of image (hi order byte)
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U8 mYOffsetLo; // Y offset of image (low order byte)
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U8 mYOffsetHi; // Y offset of image (hi order byte)
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U8 mWidthLo; // Width (low order byte)
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U8 mWidthHi; // Width (hi order byte)
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U8 mHeightLo; // Height (low order byte)
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U8 mHeightHi; // Height (hi order byte)
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U8 mPixelSize; // 8, 16, 24, 32 bits per pixel
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U8 mAttributeBits; // 4 bits: number of attributes per pixel
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U8 mOriginRightBit; // 1 bit: origin, 0 = left, 1 = right
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U8 mOriginTopBit; // 1 bit: origin, 0 = bottom, 1 = top
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U8 mInterleave; // 2 bits: interleaved flag, 0 = none, 1 = interleaved 2, 2 = interleaved 4
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U8* mColorMap;
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S32 mColorMapStart;
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S32 mColorMapLength;
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S32 mColorMapBytesPerEntry;
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BOOL mIs15Bit;
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static const U8 s5to8bits[32];
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};
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#endif
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