mirror of
https://github.com/id-Software/DOOM-3-BFG.git
synced 2024-12-14 22:41:49 +00:00
706 lines
29 KiB
C++
706 lines
29 KiB
C++
/*
|
|
===========================================================================
|
|
|
|
Doom 3 BFG Edition GPL Source Code
|
|
Copyright (C) 1993-2012 id Software LLC, a ZeniMax Media company.
|
|
Copyright (C) 2013 Robert Beckebans
|
|
|
|
This file is part of the Doom 3 BFG Edition GPL Source Code ("Doom 3 BFG Edition Source Code").
|
|
|
|
Doom 3 BFG Edition Source Code is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
Doom 3 BFG Edition Source Code is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with Doom 3 BFG Edition Source Code. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
In addition, the Doom 3 BFG Edition Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 BFG Edition Source Code. If not, please request a copy in writing from id Software at the address below.
|
|
|
|
If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.
|
|
|
|
===========================================================================
|
|
*/
|
|
#ifndef __DXTCODEC_H__
|
|
#define __DXTCODEC_H__
|
|
|
|
/*
|
|
================================================================================================
|
|
Contains the DxtEncoder and DxtDecoder declarations.
|
|
================================================================================================
|
|
*/
|
|
|
|
/*
|
|
================================================
|
|
idDxtEncoder encodes Images in a number of DXT formats. Raw input Images are assumed to be in
|
|
4-byte RGBA format. Raw input NormalMaps are assumed to be in 4-byte tangent-space NxNyNz format.
|
|
|
|
The supported formats are:
|
|
* DXT1 = colors in 4x4 block approximated by equidistant points on a line through 3D space
|
|
* DXT2 = DXT3 + colors are pre-multiplied by alpha
|
|
* DXT3 = DXT1 + explicit 4-bit alpha
|
|
* DXT4 = DXT5 + colors are pre-multiplied by alpha
|
|
* DXT5 = DXT1 + alpha values in 4x4 block approximated by equidistant points on line through alpha space
|
|
* CTX1 = colors in a 4x4 block approximated by equidistant points on a line through 2D space
|
|
* DXN1 = one DXT5 alpha block (aka DXT5A, or ATI1N)
|
|
* DXN2 = two DXT5 alpha blocks (aka 3Dc, or ATI2N)
|
|
================================================
|
|
*/
|
|
class idDxtEncoder
|
|
{
|
|
public:
|
|
idDxtEncoder()
|
|
{
|
|
srcPadding = dstPadding = 0;
|
|
}
|
|
~idDxtEncoder() {}
|
|
|
|
void SetSrcPadding( int pad )
|
|
{
|
|
srcPadding = pad;
|
|
}
|
|
void SetDstPadding( int pad )
|
|
{
|
|
dstPadding = pad;
|
|
}
|
|
|
|
// high quality DXT1 compression (no alpha), uses exhaustive search to find a line through color space and is very slow
|
|
void CompressImageDXT1HQ( const byte* inBuf, byte* outBuf, int width, int height );
|
|
|
|
// fast DXT1 compression (no alpha), for real-time use at the cost of a little quality
|
|
void CompressImageDXT1Fast( const byte* inBuf, byte* outBuf, int width, int height );
|
|
void CompressImageDXT1Fast_Generic( const byte* inBuf, byte* outBuf, int width, int height );
|
|
void CompressImageDXT1Fast_SSE2( const byte* inBuf, byte* outBuf, int width, int height );
|
|
|
|
// high quality DXT1 compression (with alpha), uses exhaustive search to find a line through color space and is very slow
|
|
void CompressImageDXT1AlphaHQ( const byte* inBuf, byte* outBuf, int width, int height )
|
|
{
|
|
/* not implemented */ assert( 0 );
|
|
}
|
|
|
|
// fast DXT1 compression (with alpha), for real-time use at the cost of a little quality
|
|
void CompressImageDXT1AlphaFast( const byte* inBuf, byte* outBuf, int width, int height );
|
|
void CompressImageDXT1AlphaFast_Generic( const byte* inBuf, byte* outBuf, int width, int height );
|
|
void CompressImageDXT1AlphaFast_SSE2( const byte* inBuf, byte* outBuf, int width, int height );
|
|
|
|
// high quality DXT5 compression, uses exhaustive search to find a line through color space and is generally
|
|
// too slow to actually use for anything
|
|
void CompressImageDXT5HQ( const byte* inBuf, byte* outBuf, int width, int height );
|
|
|
|
// fast DXT5 compression for real-time use at the cost of a little quality
|
|
void CompressImageDXT5Fast( const byte* inBuf, byte* outBuf, int width, int height );
|
|
void CompressImageDXT5Fast_Generic( const byte* inBuf, byte* outBuf, int width, int height );
|
|
void CompressImageDXT5Fast_SSE2( const byte* inBuf, byte* outBuf, int width, int height );
|
|
|
|
// high quality CTX1 compression, uses exhaustive search to find a line through 2D space and is very slow
|
|
void CompressImageCTX1HQ( const byte* inBuf, byte* outBuf, int width, int height );
|
|
|
|
// fast CTX1 compression for real-time use
|
|
void CompressImageCTX1Fast( const byte* inBuf, byte* outBuf, int width, int height )
|
|
{
|
|
/* not implemented */ assert( 0 );
|
|
}
|
|
void CompressImageCTX1Fast_Generic( const byte* inBuf, byte* outBuf, int width, int height )
|
|
{
|
|
/* not implemented */ assert( 0 );
|
|
}
|
|
void CompressImageCTX1Fast_SSE2( const byte* inBuf, byte* outBuf, int width, int height )
|
|
{
|
|
/* not implemented */ assert( 0 );
|
|
}
|
|
|
|
// high quality DXN1 (aka DXT5A or ATI1N) compression, uses exhaustive search to find a line through color space and is very slow
|
|
void CompressImageDXN1HQ( const byte* inBuf, byte* outBuf, int width, int height )
|
|
{
|
|
/* not implemented */ assert( 0 );
|
|
}
|
|
|
|
// fast single channel compression into, DXN1 (aka DXT5A or ATI1N) format, for real-time use
|
|
void CompressImageDXN1Fast( const byte* inBuf, byte* outBuf, int width, int height );
|
|
void CompressImageDXN1Fast_Generic( const byte* inBuf, byte* outBuf, int width, int height );
|
|
void CompressImageDXN1Fast_SSE2( const byte* inBuf, byte* outBuf, int width, int height )
|
|
{
|
|
/* not implemented */ assert( 0 );
|
|
}
|
|
|
|
// high quality YCoCg DXT5 compression, uses exhaustive search to find a line through color space and is very slow
|
|
void CompressYCoCgDXT5HQ( const byte* inBuf, byte* outBuf, int width, int height );
|
|
|
|
// fast YCoCg DXT5 compression for real-time use (the input is expected to be in CoCg_Y format)
|
|
void CompressYCoCgDXT5Fast( const byte* inBuf, byte* outBuf, int width, int height );
|
|
void CompressYCoCgDXT5Fast_Generic( const byte* inBuf, byte* outBuf, int width, int height );
|
|
void CompressYCoCgDXT5Fast_SSE2( const byte* inBuf, byte* outBuf, int width, int height );
|
|
|
|
// fast YCoCg-Alpha DXT5 compression for real-time use (the input is expected to be in CoCgAY format)
|
|
void CompressYCoCgAlphaDXT5Fast( const byte* inBuf, byte* outBuf, int width, int height );
|
|
|
|
// high quality YCoCg CTX1 + DXT5A compression, uses exhaustive search to find a line through 2D space and is very slow
|
|
void CompressYCoCgCTX1DXT5AHQ( const byte* inBuf, byte* outBuf, int width, int height );
|
|
|
|
// fast YCoCg CTX1 + DXT5A compression for real-time use (the input is expected to be in CoCg_Y format)
|
|
void CompressYCoCgCTX1DXT5AFast( const byte* inBuf, byte* outBuf, int width, int height );
|
|
void CompressYCoCgCTX1DXT5AFast_Generic( const byte* inBuf, byte* outBuf, int width, int height );
|
|
void CompressYCoCgCTX1DXT5AFast_SSE2( const byte* inBuf, byte* outBuf, int width, int height )
|
|
{
|
|
/* not implemented */ assert( 0 );
|
|
}
|
|
|
|
// high quality tangent space NxNyNz normal map compression into DXT1 format (Nz is not used)
|
|
void CompressNormalMapDXT1HQ( const byte* inBuf, byte* outBuf, int width, int height );
|
|
void CompressNormalMapDXT1RenormalizeHQ( const byte* inBuf, byte* outBuf, int width, int height );
|
|
|
|
// fast tangent space NxNyNz normal map compression into DXT1 format (Nz is not used), for real-time use
|
|
void CompressNormalMapDXT1Fast( const byte* inBuf, byte* outBuf, int width, int height )
|
|
{
|
|
/* not implemented */ assert( 0 );
|
|
}
|
|
void CompressNormalMapDXT1Fast_Generic( const byte* inBuf, byte* outBuf, int width, int height )
|
|
{
|
|
/* not implemented */ assert( 0 );
|
|
}
|
|
void CompressNormalMapDXT1Fast_SSE2( const byte* inBuf, byte* outBuf, int width, int height )
|
|
{
|
|
/* not implemented */ assert( 0 );
|
|
}
|
|
|
|
// high quality tangent space _Ny_Nx normal map compression into DXT5 format
|
|
void CompressNormalMapDXT5HQ( const byte* inBuf, byte* outBuf, int width, int height );
|
|
void CompressNormalMapDXT5RenormalizeHQ( const byte* inBuf, byte* outBuf, int width, int height );
|
|
|
|
// fast tangent space _Ny_Nx normal map compression into DXT5 format, for real-time use
|
|
void CompressNormalMapDXT5Fast( const byte* inBuf, byte* outBuf, int width, int height );
|
|
void CompressNormalMapDXT5Fast_Generic( const byte* inBuf, byte* outBuf, int width, int height );
|
|
void CompressNormalMapDXT5Fast_SSE2( const byte* inBuf, byte* outBuf, int width, int height );
|
|
|
|
// high quality tangent space NxNy_ normal map compression into DXN2 (3Dc, ATI2N) format
|
|
void CompressNormalMapDXN2HQ( const byte* inBuf, byte* outBuf, int width, int height );
|
|
|
|
// fast tangent space NxNy_ normal map compression into DXN2 (3Dc, ATI2N) format, for real-time use
|
|
void CompressNormalMapDXN2Fast( const byte* inBuf, byte* outBuf, int width, int height );
|
|
void CompressNormalMapDXN2Fast_Generic( const byte* inBuf, byte* outBuf, int width, int height );
|
|
void CompressNormalMapDXN2Fast_SSE2( const byte* inBuf, byte* outBuf, int width, int height )
|
|
{
|
|
/* not implemented */ assert( 0 );
|
|
}
|
|
|
|
// fast single channel conversion from DXN1 (aka DXT5A or ATI1N) to DXT1, reasonably fast (also works in-place)
|
|
void ConvertImageDXN1_DXT1( const byte* inBuf, byte* outBuf, int width, int height );
|
|
|
|
// fast single channel conversion from DXT1 to DXN1 (aka DXT5A or ATI1N), reasonably fast (also works in-place)
|
|
void ConvertImageDXT1_DXN1( const byte* inBuf, byte* outBuf, int width, int height )
|
|
{
|
|
/* not implemented */ assert( 0 );
|
|
}
|
|
|
|
// fast tangent space NxNyNz normal map conversion from DXN (3Dc, ATI2N) to DXT5, reasonably fast (also works in-place)
|
|
void ConvertNormalMapDXN2_DXT5( const byte* inBuf, byte* outBuf, int width, int height );
|
|
|
|
// fast tangent space NxNyNz normal map conversion DXT5 to DXN (3Dc, ATI2N), reasonably fast (also works in-place)
|
|
void ConvertNormalMapDXT5_DXN2( const byte* inBuf, byte* outBuf, int width, int height );
|
|
|
|
private:
|
|
int width;
|
|
int height;
|
|
byte* outData;
|
|
int srcPadding;
|
|
int dstPadding;
|
|
|
|
void EmitByte( byte b );
|
|
void EmitUShort( unsigned short s );
|
|
void EmitUInt( unsigned int i );
|
|
unsigned int AlphaDistance( const byte a1, const byte a2 ) const;
|
|
unsigned int ColorDistance( const byte* c1, const byte* c2 ) const;
|
|
unsigned int ColorDistanceWeighted( const byte* c1, const byte* c2 ) const;
|
|
unsigned int CTX1Distance( const byte* c1, const byte* c2 ) const;
|
|
unsigned short ColorTo565( const byte* color ) const;
|
|
unsigned short ColorTo565( byte r, byte g, byte b ) const;
|
|
void ColorFrom565( unsigned short c565, byte* color ) const;
|
|
byte GreenFrom565( unsigned short c565 ) const;
|
|
|
|
void NV4XHardwareBugFix( byte* minColor, byte* maxColor ) const;
|
|
|
|
bool HasConstantValuePer4x4Block( const byte* inBuf, int width, int height, int channel ) const;
|
|
void WriteTinyColorDXT1( const byte* inBuf, int width, int height );
|
|
void WriteTinyColorDXT5( const byte* inBuf, int width, int height );
|
|
void WriteTinyColorCTX1DXT5A( const byte* inBuf, int width, int height );
|
|
void WriteTinyNormalMapDXT5( const byte* NxNy, int width, int height );
|
|
void WriteTinyNormalMapDXN( const byte* NxNy, int width, int height );
|
|
void WriteTinyDXT5A( const byte* NxNy, int width, int height );
|
|
|
|
void GetMinMaxColorsMaxDist( const byte* colorBlock, byte* minColor, byte* maxColor ) const;
|
|
void GetMinMaxColorsLuminance( const byte* colorBlock, byte* minColor, byte* maxColor ) const;
|
|
int GetSquareAlphaError( const byte* colorBlock, const int alphaOffset, const byte minAlpha, const byte maxAlpha, int lastError ) const;
|
|
int GetMinMaxAlphaHQ( const byte* colorBlock, const int alphaOffset, byte* minColor, byte* maxColor ) const;
|
|
int GetSquareColorsError( const byte* colorBlock, const unsigned short color0, const unsigned short color1, int lastError ) const;
|
|
int GetMinMaxColorsHQ( const byte* colorBlock, byte* minColor, byte* maxColor, bool noBlack ) const;
|
|
int GetSquareCTX1Error( const byte* colorBlock, const byte* color0, const byte* color1, int lastError ) const;
|
|
int GetMinMaxCTX1HQ( const byte* colorBlock, byte* minColor, byte* maxColor ) const;
|
|
int GetSquareNormalYError( const byte* colorBlock, const unsigned short color0, const unsigned short color1, int lastError, int scale ) const;
|
|
int GetMinMaxNormalYHQ( const byte* colorBlock, byte* minColor, byte* maxColor, bool noBlack, int scale ) const;
|
|
int GetSquareNormalsDXT1Error( const int* colorBlock, const unsigned short color0, const unsigned short color1, int lastError, unsigned int& colorIndices ) const;
|
|
int GetMinMaxNormalsDXT1HQ( const byte* colorBlock, byte* minColor, byte* maxColor, unsigned int& colorIndices, bool noBlack ) const;
|
|
int GetSquareNormalsDXT5Error( const int* normalBlock, const byte* minNormal, const byte* maxNormal, int lastError, unsigned int& colorIndices, byte* alphaIndices ) const;
|
|
int GetMinMaxNormalsDXT5HQ( const byte* normalBlock, byte* minColor, byte* maxColor, unsigned int& colorIndices, byte* alphaIndices ) const;
|
|
int GetMinMaxNormalsDXT5HQFast( const byte* normalBlock, byte* minColor, byte* maxColor, unsigned int& colorIndices, byte* alphaIndices ) const;
|
|
void ScaleYCoCg( byte* colorBlock ) const;
|
|
void BiasScaleNormalY( byte* colorBlock ) const;
|
|
void RotateNormalsDXT1( byte* block ) const;
|
|
void RotateNormalsDXT5( byte* block ) const;
|
|
int FindColorIndices( const byte* colorBlock, const unsigned short color0, const unsigned short color1, unsigned int& result ) const;
|
|
int FindAlphaIndices( const byte* colorBlock, const int alphaOffset, const byte alpha0, const byte alpha1, byte* indexes ) const;
|
|
int FindCTX1Indices( const byte* colorBlock, const byte* color0, const byte* color1, unsigned int& result ) const;
|
|
|
|
void ExtractBlock( const byte* inPtr, int width, byte* colorBlock ) const;
|
|
void GetMinMaxBBox( const byte* colorBlock, byte* minColor, byte* maxColor ) const;
|
|
void InsetColorsBBox( byte* minColor, byte* maxColor ) const;
|
|
void SelectColorsDiagonal( const byte* colorBlock, byte* minColor, byte* maxColor ) const;
|
|
void ScaleYCoCg( byte* colorBlock, byte* minColor, byte* maxColor ) const;
|
|
void InsetYCoCgAlpaBBox( byte* minColor, byte* maxColor ) const;
|
|
void InsetYCoCgBBox( byte* minColor, byte* maxColor ) const;
|
|
void SelectYCoCgDiagonal( const byte* colorBlock, byte* minColor, byte* maxColor ) const;
|
|
void InsetNormalsBBoxDXT5( byte* minNormal, byte* maxNormal ) const;
|
|
void InsetNormalsBBox3Dc( byte* minNormal, byte* maxNormal ) const;
|
|
void EmitColorIndices( const byte* colorBlock, const byte* minColor, const byte* maxColor );
|
|
void EmitColorAlphaIndices( const byte* colorBlock, const byte* minColor, const byte* maxColor );
|
|
void EmitCTX1Indices( const byte* colorBlock, const byte* minColor, const byte* maxColor );
|
|
void EmitAlphaIndices( const byte* colorBlock, const int channel, const byte minAlpha, const byte maxAlpha );
|
|
void EmitGreenIndices( const byte* block, const int channel, const byte minGreen, const byte maxGreen );
|
|
|
|
// Keeping the ASM versions to keep the performance of 32-bit debug builds reasonable.
|
|
// The implementation using intrinsics is very slow in debug builds because registers are continuously spilled to memory.
|
|
void ExtractBlock_SSE2( const byte* inPtr, int width, byte* colorBlock ) const;
|
|
void GetMinMaxBBox_SSE2( const byte* colorBlock, byte* minColor, byte* maxColor ) const;
|
|
void InsetColorsBBox_SSE2( byte* minColor, byte* maxColor ) const;
|
|
void InsetNormalsBBoxDXT5_SSE2( byte* minNormal, byte* maxNormal ) const;
|
|
void EmitColorIndices_SSE2( const byte* colorBlock, const byte* minColor, const byte* maxColor );
|
|
void EmitColorAlphaIndices_SSE2( const byte* colorBlock, const byte* minColor, const byte* maxColor );
|
|
void EmitCoCgIndices_SSE2( const byte* colorBlock, const byte* minColor, const byte* maxColor );
|
|
void EmitAlphaIndices_SSE2( const byte* colorBlock, const int minAlpha, const int maxAlpha );
|
|
void EmitAlphaIndices_SSE2( const byte* colorBlock, const int channelBitOffset, const int minAlpha, const int maxAlpha );
|
|
void EmitGreenIndices_SSE2( const byte* block, const int channelBitOffset, const int minGreen, const int maxGreen );
|
|
void ScaleYCoCg_SSE2( byte* colorBlock, byte* minColor, byte* maxColor ) const;
|
|
void InsetYCoCgBBox_SSE2( byte* minColor, byte* maxColor ) const;
|
|
void SelectYCoCgDiagonal_SSE2( const byte* colorBlock, byte* minColor, byte* maxColor ) const;
|
|
|
|
|
|
|
|
void EmitNormalYIndices( const byte* normalBlock, const int offset, const byte minNormalY, const byte maxNormalY );
|
|
void EmitNormalYIndices_SSE2( const byte* normalBlock, const int offset, const byte minNormalY, const byte maxNormalY );
|
|
|
|
void DecodeDXNAlphaValues( const byte* inBuf, byte* values );
|
|
void EncodeDXNAlphaValues( byte* outBuf, const byte min, const byte max, const byte* values );
|
|
|
|
void DecodeNormalYValues( const byte* inBuf, byte& min, byte& max, byte* values );
|
|
void EncodeNormalRGBIndices( byte* outBuf, const byte min, const byte max, const byte* values );
|
|
};
|
|
|
|
/*
|
|
========================
|
|
idDxtEncoder::CompressImageDXT1Fast
|
|
========================
|
|
*/
|
|
ID_INLINE void idDxtEncoder::CompressImageDXT1Fast( const byte* inBuf, byte* outBuf, int width, int height )
|
|
{
|
|
#if defined(USE_INTRINSICS)
|
|
CompressImageDXT1Fast_SSE2( inBuf, outBuf, width, height );
|
|
#else
|
|
CompressImageDXT1Fast_Generic( inBuf, outBuf, width, height );
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idDxtEncoder::CompressImageDXT1AlphaFast
|
|
========================
|
|
*/
|
|
ID_INLINE void idDxtEncoder::CompressImageDXT1AlphaFast( const byte* inBuf, byte* outBuf, int width, int height )
|
|
{
|
|
#if defined(USE_INTRINSICS)
|
|
CompressImageDXT1AlphaFast_SSE2( inBuf, outBuf, width, height );
|
|
#else
|
|
CompressImageDXT1AlphaFast_Generic( inBuf, outBuf, width, height );
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idDxtEncoder::CompressImageDXT5Fast
|
|
========================
|
|
*/
|
|
ID_INLINE void idDxtEncoder::CompressImageDXT5Fast( const byte* inBuf, byte* outBuf, int width, int height )
|
|
{
|
|
#if defined(USE_INTRINSICS)
|
|
CompressImageDXT5Fast_SSE2( inBuf, outBuf, width, height );
|
|
#else
|
|
CompressImageDXT5Fast_Generic( inBuf, outBuf, width, height );
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idDxtEncoder::CompressImageDXN1Fast
|
|
========================
|
|
*/
|
|
ID_INLINE void idDxtEncoder::CompressImageDXN1Fast( const byte* inBuf, byte* outBuf, int width, int height )
|
|
{
|
|
CompressImageDXN1Fast_Generic( inBuf, outBuf, width, height );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idDxtEncoder::CompressYCoCgDXT5Fast
|
|
========================
|
|
*/
|
|
ID_INLINE void idDxtEncoder::CompressYCoCgDXT5Fast( const byte* inBuf, byte* outBuf, int width, int height )
|
|
{
|
|
#if defined(USE_INTRINSICS)
|
|
CompressYCoCgDXT5Fast_SSE2( inBuf, outBuf, width, height );
|
|
#else
|
|
CompressYCoCgDXT5Fast_Generic( inBuf, outBuf, width, height );
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idDxtEncoder::CompressYCoCgCTX1DXT5AFast
|
|
========================
|
|
*/
|
|
ID_INLINE void idDxtEncoder::CompressYCoCgCTX1DXT5AFast( const byte* inBuf, byte* outBuf, int width, int height )
|
|
{
|
|
CompressYCoCgCTX1DXT5AFast_Generic( inBuf, outBuf, width, height );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idDxtEncoder::CompressNormalMapDXT5Fast
|
|
========================
|
|
*/
|
|
ID_INLINE void idDxtEncoder::CompressNormalMapDXT5Fast( const byte* inBuf, byte* outBuf, int width, int height )
|
|
{
|
|
#if defined(USE_INTRINSICS)
|
|
CompressNormalMapDXT5Fast_SSE2( inBuf, outBuf, width, height );
|
|
#else
|
|
CompressNormalMapDXT5Fast_Generic( inBuf, outBuf, width, height );
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idDxtEncoder::CompressNormalMapDXN2Fast
|
|
========================
|
|
*/
|
|
ID_INLINE void idDxtEncoder::CompressNormalMapDXN2Fast( const byte* inBuf, byte* outBuf, int width, int height )
|
|
{
|
|
CompressNormalMapDXN2Fast_Generic( inBuf, outBuf, width, height );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idDxtEncoder::EmitByte
|
|
========================
|
|
*/
|
|
ID_INLINE void idDxtEncoder::EmitByte( byte b )
|
|
{
|
|
*outData = b;
|
|
outData += 1;
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idDxtEncoder::EmitUShort
|
|
========================
|
|
*/
|
|
ID_INLINE void idDxtEncoder::EmitUShort( unsigned short s )
|
|
{
|
|
*( ( unsigned short* )outData ) = s;
|
|
outData += 2;
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idDxtEncoder::EmitUInt
|
|
========================
|
|
*/
|
|
ID_INLINE void idDxtEncoder::EmitUInt( unsigned int i )
|
|
{
|
|
*( ( unsigned int* )outData ) = i;
|
|
outData += 4;
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idDxtEncoder::AlphaDistance
|
|
========================
|
|
*/
|
|
ID_INLINE unsigned int idDxtEncoder::AlphaDistance( const byte a1, const byte a2 ) const
|
|
{
|
|
return ( a1 - a2 ) * ( a1 - a2 );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idDxtEncoder::ColorDistance
|
|
========================
|
|
*/
|
|
ID_INLINE unsigned int idDxtEncoder::ColorDistance( const byte* c1, const byte* c2 ) const
|
|
{
|
|
return ( ( c1[ 0 ] - c2[ 0 ] ) * ( c1[ 0 ] - c2[ 0 ] ) ) + ( ( c1[ 1 ] - c2[ 1 ] ) * ( c1[ 1 ] - c2[ 1 ] ) ) + ( ( c1[ 2 ] - c2[ 2 ] ) * ( c1[ 2 ] - c2[ 2 ] ) );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idDxtEncoder::ColorDistanceWeighted
|
|
========================
|
|
*/
|
|
ID_INLINE unsigned int idDxtEncoder::ColorDistanceWeighted( const byte* c1, const byte* c2 ) const
|
|
{
|
|
int r, g, b;
|
|
int rmean;
|
|
|
|
// http://www.compuphase.com/cmetric.htm
|
|
rmean = ( ( int )c1[0] + ( int )c2[0] ) / 2;
|
|
r = ( int )c1[0] - ( int )c2[0];
|
|
g = ( int )c1[1] - ( int )c2[1];
|
|
b = ( int )c1[2] - ( int )c2[2];
|
|
return ( ( ( 512 + rmean ) * r * r ) >> 8 ) + 4 * g * g + ( ( ( 767 - rmean ) * b * b ) >> 8 );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idDxtEncoder::CTX1Distance
|
|
========================
|
|
*/
|
|
ID_INLINE unsigned int idDxtEncoder::CTX1Distance( const byte* c1, const byte* c2 ) const
|
|
{
|
|
return ( ( c1[ 0 ] - c2[ 0 ] ) * ( c1[ 0 ] - c2[ 0 ] ) ) + ( ( c1[ 1 ] - c2[ 1 ] ) * ( c1[ 1 ] - c2[ 1 ] ) );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idDxtEncoder::ColorTo565
|
|
========================
|
|
*/
|
|
ID_INLINE unsigned short idDxtEncoder::ColorTo565( const byte* color ) const
|
|
{
|
|
return ( ( color[ 0 ] >> 3 ) << 11 ) | ( ( color[ 1 ] >> 2 ) << 5 ) | ( color[ 2 ] >> 3 );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idDxtEncoder::ColorFrom565
|
|
========================
|
|
*/
|
|
ID_INLINE void idDxtEncoder::ColorFrom565( unsigned short c565, byte* color ) const
|
|
{
|
|
color[0] = byte( ( ( c565 >> 8 ) & ( ( ( 1 << ( 8 - 3 ) ) - 1 ) << 3 ) ) | ( ( c565 >> 13 ) & ( ( 1 << 3 ) - 1 ) ) );
|
|
color[1] = byte( ( ( c565 >> 3 ) & ( ( ( 1 << ( 8 - 2 ) ) - 1 ) << 2 ) ) | ( ( c565 >> 9 ) & ( ( 1 << 2 ) - 1 ) ) );
|
|
color[2] = byte( ( ( c565 << 3 ) & ( ( ( 1 << ( 8 - 3 ) ) - 1 ) << 3 ) ) | ( ( c565 >> 2 ) & ( ( 1 << 3 ) - 1 ) ) );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idDxtEncoder::ColorTo565
|
|
========================
|
|
*/
|
|
ID_INLINE unsigned short idDxtEncoder::ColorTo565( byte r, byte g, byte b ) const
|
|
{
|
|
return ( ( r >> 3 ) << 11 ) | ( ( g >> 2 ) << 5 ) | ( b >> 3 );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idDxtEncoder::GreenFrom565
|
|
========================
|
|
*/
|
|
ID_INLINE byte idDxtEncoder::GreenFrom565( unsigned short c565 ) const
|
|
{
|
|
byte c = byte( ( c565 & ( ( ( 1 << 6 ) - 1 ) << 5 ) ) >> 3 );
|
|
return ( c | ( c >> 6 ) );
|
|
}
|
|
|
|
/*
|
|
================================================
|
|
idDxtDecoder decodes DXT-compressed Images. Raw output Images are in
|
|
4-byte RGBA format. Raw output NormalMaps are in 4-byte tangent-space NxNyNz format.
|
|
================================================
|
|
*/
|
|
class idDxtDecoder
|
|
{
|
|
public:
|
|
|
|
// DXT1 decompression (no alpha)
|
|
void DecompressImageDXT1( const byte* inBuf, byte* outBuf, int width, int height );
|
|
|
|
// DXT5 decompression
|
|
void DecompressImageDXT5( const byte* inBuf, byte* outBuf, int width, int height );
|
|
|
|
// DXT5 decompression with nVidia 7x hardware bug
|
|
void DecompressImageDXT5_nVidia7x( const byte* inBuf, byte* outBuf, int width, int height );
|
|
|
|
// CTX1
|
|
void DecompressImageCTX1( const byte* inBuf, byte* outBuf, int width, int height )
|
|
{
|
|
/* not implemented */ assert( 0 );
|
|
}
|
|
|
|
// DXN1
|
|
void DecompressImageDXN1( const byte* inBuf, byte* outBuf, int width, int height )
|
|
{
|
|
/* not implemented */ assert( 0 );
|
|
}
|
|
|
|
// YCoCg DXT5 (the output is in CoCg_Y format)
|
|
void DecompressYCoCgDXT5( const byte* inBuf, byte* outBuf, int width, int height );
|
|
|
|
// YCoCg CTX1 + DXT5A (the output is in CoCg_Y format)
|
|
void DecompressYCoCgCTX1DXT5A( const byte* inBuf, byte* outBuf, int width, int height );
|
|
|
|
// tangent space normal map decompression from DXT1 format
|
|
void DecompressNormalMapDXT1( const byte* inBuf, byte* outBuf, int width, int height );
|
|
void DecompressNormalMapDXT1Renormalize( const byte* inBuf, byte* outBuf, int width, int height );
|
|
|
|
// tangent space normal map decompression from DXT5 format
|
|
void DecompressNormalMapDXT5( const byte* inBuf, byte* outBuf, int width, int height );
|
|
void DecompressNormalMapDXT5Renormalize( const byte* inBuf, byte* outBuf, int width, int height );
|
|
|
|
// tangent space normal map decompression from DXN2 format
|
|
void DecompressNormalMapDXN2( const byte* inBuf, byte* outBuf, int width, int height );
|
|
|
|
// decompose a DXT image into indices and two images with colors
|
|
void DecomposeImageDXT1( const byte* inBuf, byte* colorIndices, byte* pic1, byte* pic2, int width, int height );
|
|
void DecomposeImageDXT5( const byte* inBuf, byte* colorIndices, byte* alphaIndices, byte* pic1, byte* pic2, int width, int height );
|
|
|
|
private:
|
|
int width;
|
|
int height;
|
|
const byte* inData;
|
|
|
|
byte ReadByte();
|
|
unsigned short ReadUShort();
|
|
unsigned int ReadUInt();
|
|
unsigned short ColorTo565( const byte* color ) const;
|
|
void ColorFrom565( unsigned short c565, byte* color ) const;
|
|
unsigned short NormalYTo565( byte y ) const;
|
|
byte NormalYFrom565( unsigned short c565 ) const;
|
|
byte NormalScaleFrom565( unsigned short c565 ) const;
|
|
byte NormalBiasFrom565( unsigned short c565 ) const;
|
|
|
|
void EmitBlock( byte* outPtr, int x, int y, const byte* colorBlock );
|
|
void DecodeAlphaValues( byte* colorBlock, const int offset );
|
|
void DecodeColorValues( byte* colorBlock, bool noBlack, bool writeAlpha );
|
|
void DecodeCTX1Values( byte* colorBlock );
|
|
|
|
void DecomposeColorBlock( byte colors[2][4], byte colorIndices[16], bool noBlack );
|
|
void DecomposeAlphaBlock( byte colors[2][4], byte alphaIndices[16] );
|
|
|
|
void DecodeNormalYValues( byte* normalBlock, const int offsetY, byte& bias, byte& scale );
|
|
void DeriveNormalZValues( byte* normalBlock );
|
|
};
|
|
|
|
/*
|
|
========================
|
|
idDxtDecoder::ReadByte
|
|
========================
|
|
*/
|
|
ID_INLINE byte idDxtDecoder::ReadByte()
|
|
{
|
|
byte b = *inData;
|
|
inData += 1;
|
|
return b;
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idDxtDecoder::ReadUShort
|
|
========================
|
|
*/
|
|
ID_INLINE unsigned short idDxtDecoder::ReadUShort()
|
|
{
|
|
unsigned short s = *( ( unsigned short* )inData );
|
|
inData += 2;
|
|
return s;
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idDxtDecoder::ReadUInt
|
|
========================
|
|
*/
|
|
ID_INLINE unsigned int idDxtDecoder::ReadUInt()
|
|
{
|
|
unsigned int i = *( ( unsigned int* )inData );
|
|
inData += 4;
|
|
return i;
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idDxtDecoder::ColorTo565
|
|
========================
|
|
*/
|
|
ID_INLINE unsigned short idDxtDecoder::ColorTo565( const byte* color ) const
|
|
{
|
|
return ( ( color[ 0 ] >> 3 ) << 11 ) | ( ( color[ 1 ] >> 2 ) << 5 ) | ( color[ 2 ] >> 3 );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idDxtDecoder::ColorFrom565
|
|
========================
|
|
*/
|
|
ID_INLINE void idDxtDecoder::ColorFrom565( unsigned short c565, byte* color ) const
|
|
{
|
|
color[0] = byte( ( ( c565 >> 8 ) & ( ( ( 1 << ( 8 - 3 ) ) - 1 ) << 3 ) ) | ( ( c565 >> 13 ) & ( ( 1 << 3 ) - 1 ) ) );
|
|
color[1] = byte( ( ( c565 >> 3 ) & ( ( ( 1 << ( 8 - 2 ) ) - 1 ) << 2 ) ) | ( ( c565 >> 9 ) & ( ( 1 << 2 ) - 1 ) ) );
|
|
color[2] = byte( ( ( c565 << 3 ) & ( ( ( 1 << ( 8 - 3 ) ) - 1 ) << 3 ) ) | ( ( c565 >> 2 ) & ( ( 1 << 3 ) - 1 ) ) );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idDxtDecoder::NormalYTo565
|
|
========================
|
|
*/
|
|
ID_INLINE unsigned short idDxtDecoder::NormalYTo565( byte y ) const
|
|
{
|
|
return ( ( y >> 2 ) << 5 );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idDxtDecoder::NormalYFrom565
|
|
========================
|
|
*/
|
|
ID_INLINE byte idDxtDecoder::NormalYFrom565( unsigned short c565 ) const
|
|
{
|
|
byte c = byte( ( c565 & ( ( ( 1 << 6 ) - 1 ) << 5 ) ) >> 3 );
|
|
return ( c | ( c >> 6 ) );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idDxtDecoder::NormalBiasFrom565
|
|
========================
|
|
*/
|
|
ID_INLINE byte idDxtDecoder::NormalBiasFrom565( unsigned short c565 ) const
|
|
{
|
|
byte c = byte( ( c565 & ( ( ( 1 << 5 ) - 1 ) << 11 ) ) >> 8 );
|
|
return ( c | ( c >> 5 ) );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idDxtDecoder::NormalScaleFrom565
|
|
========================
|
|
*/
|
|
ID_INLINE byte idDxtDecoder::NormalScaleFrom565( unsigned short c565 ) const
|
|
{
|
|
byte c = byte( ( c565 & ( ( ( 1 << 5 ) - 1 ) << 0 ) ) << 3 );
|
|
return ( c | ( c >> 5 ) );
|
|
}
|
|
|
|
#endif // !__DXTCODEC_H__
|