mirror of
https://github.com/nillerusr/source-engine.git
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112 lines
2.5 KiB
C++
112 lines
2.5 KiB
C++
//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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// $NoKeywords: $
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//
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//=============================================================================//
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#include <stdlib.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include "vtf/vtf.h"
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#include "UtlBuffer.h"
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int main( int argc, char **argv )
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{
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if( argc != 5 )
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{
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fprintf( stderr, "Usage: vtfscreen blah.vtf 0 1 2\n" );
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exit( -1 );
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}
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const char *pSrcFilename = argv[1];
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int rOffset = atoi( argv[2] );
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int gOffset = atoi( argv[3] );
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int bOffset = atoi( argv[4] );
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CUtlBuffer srcData;
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struct _stat buf;
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if( _stat( pSrcFilename, &buf ) == -1 )
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{
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fprintf( stderr, "Couldn't stat %s\n", pSrcFilename );
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exit( -1 );
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}
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int srcFileSize = buf.st_size;
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srcData.EnsureCapacity( srcFileSize );
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FILE *fp = fopen( pSrcFilename, "rb" );
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if( !fp )
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{
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fprintf( stderr, "Couldn't open %s\n", pSrcFilename );
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exit( -1 );
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}
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int nBytesRead = fread( srcData.Base(), 1, srcFileSize, fp );
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fclose( fp );
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srcData.SeekPut( CUtlBuffer::SEEK_HEAD, nBytesRead );
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IVTFTexture *pSrcTexture = CreateVTFTexture();
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pSrcTexture->Unserialize( srcData );
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ImageFormat srcFormat = pSrcTexture->Format();
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pSrcTexture->ConvertImageFormat( IMAGE_FORMAT_DEFAULT, false );
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int totalSize = pSrcTexture->ComputeTotalSize();
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unsigned char *pImageData = pSrcTexture->ImageData();
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int i;
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for( i = 0; i < totalSize; i += 4 )
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{
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#if 0
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// ATI BEFORE E32003
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int r, g, b;
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r = ( int )pImageData[i+0];
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g = ( int )pImageData[i+1];
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b = ( int )pImageData[i+2];
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int grey = r + g + b;
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grey = grey / 3;
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pImageData[i+0] = 0;
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pImageData[i+1] = grey;
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pImageData[i+2] = 0;
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#endif
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#if 0
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// NVIDIA - first e3 build
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pImageData[i+1] = 0;
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pImageData[i+2] = 0;
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#endif
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#if 0
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// ATI e3 build on . .get the green component and stomp all channels with it.
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pImageData[i+0] = pImageData[i+1];
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pImageData[i+2] = pImageData[i+1];
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#endif
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#if 0
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// Intel . .get the blue component and stomp all channels with it.
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pImageData[i+0] = pImageData[i+2];
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pImageData[i+1] = pImageData[i+2];
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#endif
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// leave alpha alone
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int tmpR, tmpG, tmpB;
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tmpR = pImageData[i+rOffset];
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tmpG = pImageData[i+gOffset];
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tmpB = pImageData[i+bOffset];
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pImageData[i+0] = tmpR;
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pImageData[i+1] = tmpG;
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pImageData[i+2] = tmpB;
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}
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pSrcTexture->ConvertImageFormat( srcFormat, false );
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CUtlBuffer dstData;
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pSrcTexture->Serialize( dstData );
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fp = fopen( pSrcFilename, "wb" );
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fwrite( dstData.Base(), 1, dstData.TellPut(), fp );
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fclose( fp );
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return 0;
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}
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