109 lines
3.9 KiB
C++
109 lines
3.9 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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* $LicenseInfo:firstyear=2001&license=viewerlgpl$
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* Second Life Viewer Source Code
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* Copyright (C) 2010, Linden Research, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License only.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
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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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