134 lines
2.9 KiB
C
134 lines
2.9 KiB
C
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/* warp light generation */
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#include <string.h>
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#include <stdio.h>
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#include <dir.h>
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#include <dos.h>
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#include <mem.h>
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#include <fcntl.h>
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#include <sys\stat.h>
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#include <io.h>
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#include <bios.h>
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#include <stdlib.h>
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typedef unsigned char byte;
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unsigned NUMLIGHTS;
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byte palette[768];
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byte far lightpalette[254][256];
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/*
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= RF_BuildLights
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= 0 is full palette
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= NUMLIGHTS and NUMLIGHTS+1 are all black
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*/
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void RF_BuildLights (void)
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{
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int i,l,c,test,table;
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int red,green,blue;
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int dist,bestdist,rdist,gdist,bdist,bestcolor;
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byte *palptr, *palsrc;
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byte far *screen;
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screen = MK_FP(0xa000,0);
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for (l=0;l<NUMLIGHTS;l++)
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{
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palsrc = palette;
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for (c=0;c<256;c++)
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{
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red = *palsrc++;
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green = *palsrc++;
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blue = *palsrc++;
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// red = (red*(NUMLIGHTS-l)+(NUMLIGHTS/2))/NUMLIGHTS + l;
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// green = (green*(NUMLIGHTS-l)+(NUMLIGHTS/2))/NUMLIGHTS + l;
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// blue = (blue*(NUMLIGHTS-l)+(NUMLIGHTS/2))/NUMLIGHTS + l;
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red = (red*(NUMLIGHTS-l)+(NUMLIGHTS/2))/NUMLIGHTS;
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green = (green*(NUMLIGHTS-l)+(NUMLIGHTS/2))/NUMLIGHTS;
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blue = (blue*(NUMLIGHTS-l)+(NUMLIGHTS/2))/NUMLIGHTS;
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// find the closest color
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palptr = palette;
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bestdist = 32000;
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if (c<255)
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for (test=0;test<255;test++)
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{
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rdist = (int)*palptr++ - red;
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gdist = (int)*palptr++ - green;
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bdist = (int)*palptr++ - blue;
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dist = rdist*rdist + gdist*gdist + bdist*bdist;
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if (dist<bestdist)
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{
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bestdist=dist;
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bestcolor=test;
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}
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}
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else bestcolor=c;
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lightpalette[l][c] = bestcolor;
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}
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_fmemcpy (screen,lightpalette[l],256);
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screen+=320;
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_fmemcpy (screen,lightpalette[l],256);
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screen+=320;
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_fmemcpy (screen,lightpalette[l],256);
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screen+=320;
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}
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}
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void extern LoadCPR(char *filename);
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int cdecl main(int argc,char **argv)
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{
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int i,j,loop,handle;
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unsigned writen;
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if (argc != 3)
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{
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printf ("lights picture.lbm lighttables\n");
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return 1;
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}
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_AX=0x13; geninterrupt(0x10);
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LoadCPR(argv[1]);
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_ES = FP_SEG(palette);
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_DX = FP_OFF(palette);
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_BX = 0;
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_CX = 0x100;
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_AX = 0x1017;
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geninterrupt(0x10); // get default palette
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// write palette
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if ( (handle = open("palette.dat", O_BINARY | O_WRONLY | O_CREAT |
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O_TRUNC,S_IREAD | S_IWRITE) ) == -1)
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{
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perror ("Error opening output palette.dat");
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return 1;
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}
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write (handle,palette,sizeof(palette));
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close(handle);
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// write light sources
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NUMLIGHTS = atoi (argv[2]);
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RF_BuildLights ();
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if ( (handle = open("lights.dat", O_BINARY | O_WRONLY | O_CREAT |
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O_TRUNC,S_IREAD | S_IWRITE) ) == -1)
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{
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perror ("Error opening output lights.dat");
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return 1;
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}
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_dos_write (handle,&lightpalette[0][0],NUMLIGHTS*256,&writen);
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close(handle);
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bioskey (0);
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_AX = 3;
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geninterrupt(0x10);
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return 0;
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}
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