mirror of
https://github.com/nillerusr/source-engine.git
synced 2024-12-22 14:16:50 +00:00
92 lines
2.5 KiB
C++
92 lines
2.5 KiB
C++
//========= Copyright Valve Corporation, All rights reserved. ============//
|
|
//
|
|
// Purpose:
|
|
//
|
|
//===========================================================================//
|
|
|
|
#include <tier0/platform.h>
|
|
#include "bitmap/float_bm.h"
|
|
#include "mathlib/mathlib.h"
|
|
#include <tier2/tier2.h>
|
|
|
|
#define N_TEXTURES_OUTPUT 3
|
|
#define TEXTURE_TO_TEXTURE_SCALE 8.0
|
|
#define BASE_SCALE 0.25
|
|
|
|
static float Truncate8( float f )
|
|
{
|
|
uint8 px= (uint8) min(255.0, (f*255.0));
|
|
return px*(1.0/255.0);
|
|
}
|
|
|
|
static float ErrorWeights[]={ 0.3, 0.59, 0.11 };
|
|
|
|
void main(int argc,char **argv)
|
|
{
|
|
InitCommandLineProgram( argc, argv );
|
|
if ( argc==3)
|
|
{
|
|
FloatBitMap_t src_texture;
|
|
src_texture.LoadFromPFM( argv[1] );
|
|
float sfactor=atof(argv[2]);
|
|
// we will split the float texture into 2 textures.
|
|
FloatBitMap_t output_textures[N_TEXTURES_OUTPUT];
|
|
for(int o=0; o<N_TEXTURES_OUTPUT; o++)
|
|
{
|
|
output_textures[o].AllocateRGB( src_texture.Width, src_texture.Height );
|
|
}
|
|
for(int y=0; y < src_texture.Height; y++)
|
|
for(int x=0; x< src_texture.Width; x++)
|
|
{
|
|
for(int c=0;c<3;c++)
|
|
src_texture.Pixel(x,y,c) *= sfactor;
|
|
float curscale=BASE_SCALE;
|
|
float px_error[N_TEXTURES_OUTPUT];
|
|
float sum_error=0;
|
|
for(int o=0; o<N_TEXTURES_OUTPUT; o++)
|
|
{
|
|
px_error[o]=0.;
|
|
for(int c=0;c<3;c++)
|
|
{
|
|
float opixel=Truncate8( src_texture.Pixel( x, y, c )/curscale );
|
|
|
|
output_textures[o].Pixel( x, y, c )= opixel;
|
|
float expanded_pixel = curscale * opixel;
|
|
float err= fabs( src_texture.Pixel( x, y, c )- expanded_pixel );
|
|
if (src_texture.Pixel(x,y,c) > curscale)
|
|
err *=2;
|
|
px_error[o] += ErrorWeights[o] * err;
|
|
}
|
|
sum_error += px_error[o];
|
|
curscale *= TEXTURE_TO_TEXTURE_SCALE;
|
|
}
|
|
// now, set the weight for each map based upon closeness of fit between the scales
|
|
for(int o=0; o<N_TEXTURES_OUTPUT; o++)
|
|
{
|
|
if (sum_error == 0) // possible, I guess, for black
|
|
{
|
|
if ( o == 0)
|
|
src_texture.Pixel(x, y, 3) = 1.0;
|
|
else
|
|
src_texture.Pixel(x, y, 3) = 0.0;
|
|
}
|
|
else
|
|
output_textures[o].Pixel(x, y, 3)=1.0-(px_error[o]/sum_error);
|
|
}
|
|
}
|
|
// now, output results
|
|
for(int o=0;o<N_TEXTURES_OUTPUT;o++)
|
|
{
|
|
char fnamebuf[1024];
|
|
strcpy(fnamebuf, argv[1]);
|
|
char *dot=strchr(fnamebuf,'.');
|
|
if (! dot)
|
|
dot=fnamebuf+strlen(fnamebuf);
|
|
sprintf(dot,"_%d.tga",o);
|
|
output_textures[o].WriteTGAFile(fnamebuf);
|
|
}
|
|
}
|
|
else
|
|
printf("format is 'pfm2tgas xxx.pfm scalefactor'\n");
|
|
}
|