raze/polymer/eduke32/build/src/util/transpal.c

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// "Build Engine & Tools" Copyright (c) 1993-1997 Ken Silverman
// Ken Silverman's official web site: "http://www.advsys.net/ken"
// See the included license file "BUILDLIC.TXT" for license info.
//
// This file has been modified from Ken Silverman's original release
// by Jonathon Fowler (jf@jonof.id.au)
#include "compat.h"
#include "pragmas.h"
#define MAXPALOOKUPS 256
static int numpalookups, transratio;
static char palettefilename[13], origpalookup[MAXPALOOKUPS<<8];
static char palette[768], palookup[MAXPALOOKUPS<<8], transluc[65536];
static char closestcol[64][64][64];
#define FASTPALGRIDSIZ 8
static int rdist[129], gdist[129], bdist[129];
static char colhere[((FASTPALGRIDSIZ+2)*(FASTPALGRIDSIZ+2)*(FASTPALGRIDSIZ+2))>>3];
static char colhead[(FASTPALGRIDSIZ+2)*(FASTPALGRIDSIZ+2)*(FASTPALGRIDSIZ+2)];
static int colnext[256];
static char coldist[8] = {0,1,2,3,4,3,2,1};
static int colscan[27];
char getclosestcol(int r, int g, int b)
{
int i, j, k, dist, mindist, retcol;
int *rlookup, *glookup, *blookup;
char *ptr;
if (closestcol[r][g][b] != 255) return(closestcol[r][g][b]);
j = (r>>3)*FASTPALGRIDSIZ*FASTPALGRIDSIZ+(g>>3)*FASTPALGRIDSIZ+(b>>3)+FASTPALGRIDSIZ*FASTPALGRIDSIZ+FASTPALGRIDSIZ+1;
mindist = min(rdist[coldist[r&7]+64+8],gdist[coldist[g&7]+64+8]);
mindist = min(mindist,bdist[coldist[b&7]+64+8]);
mindist++;
rlookup = (int *)&rdist[64-r];
glookup = (int *)&gdist[64-g];
blookup = (int *)&bdist[64-b];
retcol = -1;
for(k=26;k>=0;k--)
{
i = colscan[k]+j; if ((colhere[i>>3]&(1<<(i&7))) == 0) continue;
for(i=colhead[i];i>=0;i=colnext[i])
{
ptr = (char *)&palette[i*3];
dist = glookup[ptr[1]]; if (dist >= mindist) continue;
dist += rlookup[ptr[0]]; if (dist >= mindist) continue;
dist += blookup[ptr[2]]; if (dist >= mindist) continue;
mindist = dist; retcol = i;
}
}
if (retcol < 0)
{
mindist = 0x7fffffff;
ptr = (char *)&palette[768-3];
for(i=255;i>=0;i--,ptr-=3)
{
dist = glookup[ptr[1]]; if (dist >= mindist) continue;
dist += rlookup[ptr[0]]; if (dist >= mindist) continue;
dist += blookup[ptr[2]]; if (dist >= mindist) continue;
mindist = dist; retcol = i;
}
}
ptr = (char *)&closestcol[r][g][b];
*ptr = retcol;
if ((r >= 4) && (ptr[(-2)<<12] == retcol)) ptr[(-3)<<12] = retcol, ptr[(-2)<<12] = retcol, ptr[(-1)<<12] = retcol;
if ((g >= 4) && (ptr[(-2)<<6] == retcol)) ptr[(-3)<<6] = retcol, ptr[(-2)<<6] = retcol, ptr[(-1)<<6] = retcol;
if ((b >= 4) && (ptr[(-2)] == retcol)) ptr[(-3)] = retcol, ptr[(-2)] = retcol, ptr[(-1)] = retcol;
if ((r < 64-4) && (ptr[(2)<<12] == retcol)) ptr[(3)<<12] = retcol, ptr[(2)<<12] = retcol, ptr[(1)<<12] = retcol;
if ((g < 64-4) && (ptr[(2)<<6] == retcol)) ptr[(3)<<6] = retcol, ptr[(2)<<6] = retcol, ptr[(1)<<6] = retcol;
if ((b < 64-4) && (ptr[(2)] == retcol)) ptr[(3)] = retcol, ptr[(2)] = retcol, ptr[(1)] = retcol;
if ((r >= 2) && (ptr[(-1)<<12] == retcol)) ptr[(-1)<<12] = retcol;
if ((g >= 2) && (ptr[(-1)<<6] == retcol)) ptr[(-1)<<6] = retcol;
if ((b >= 2) && (ptr[(-1)] == retcol)) ptr[(-1)] = retcol;
if ((r < 64-2) && (ptr[(1)<<12] == retcol)) ptr[(1)<<12] = retcol;
if ((g < 64-2) && (ptr[(1)<<6] == retcol)) ptr[(1)<<6] = retcol;
if ((b < 64-2) && (ptr[(1)] == retcol)) ptr[(1)] = retcol;
return(retcol);
}
char getpalookup(char dashade, char dacol)
{
int r, g, b, t;
char *ptr;
ptr = (char *)&palette[dacol*3];
t = divscale16(numpalookups-dashade,numpalookups);
r = ((ptr[0]*t+32768)>>16);
g = ((ptr[1]*t+32768)>>16);
b = ((ptr[2]*t+32768)>>16);
return(getclosestcol(r,g,b));
}
char gettrans(char dat1, char dat2, int datransratio)
{
int r, g, b;
char *ptr, *ptr2;
ptr = (char *)&palette[dat1*3];
ptr2 = (char *)&palette[dat2*3];
r = ptr[0]; r += (((ptr2[0]-r)*datransratio+128)>>8);
g = ptr[1]; g += (((ptr2[1]-g)*datransratio+128)>>8);
b = ptr[2]; b += (((ptr2[2]-b)*datransratio+128)>>8);
return(getclosestcol(r,g,b));
}
void initfastcolorlookup(int rscale, int gscale, int bscale)
{
int i, j, x, y, z;
char *ptr;
j = 0;
for(i=64;i>=0;i--)
{
//j = (i-64)*(i-64);
rdist[i] = rdist[128-i] = j*rscale;
gdist[i] = gdist[128-i] = j*gscale;
bdist[i] = bdist[128-i] = j*bscale;
j += 129-(i<<1);
}
Bmemset(colhere, 0, sizeof(colhere));
Bmemset(colhead, 0, sizeof(colhead));
ptr = (char *)&palette[768-3];
for(i=255;i>=0;i--,ptr-=3)
{
j = (ptr[0]>>3)*FASTPALGRIDSIZ*FASTPALGRIDSIZ+(ptr[1]>>3)*FASTPALGRIDSIZ+(ptr[2]>>3)+FASTPALGRIDSIZ*FASTPALGRIDSIZ+FASTPALGRIDSIZ+1;
if (colhere[j>>3]&(1<<(j&7))) colnext[i] = colhead[j]; else colnext[i] = -1;
colhead[j] = i;
colhere[j>>3] |= (1<<(j&7));
}
i = 0;
for(x=-FASTPALGRIDSIZ*FASTPALGRIDSIZ;x<=FASTPALGRIDSIZ*FASTPALGRIDSIZ;x+=FASTPALGRIDSIZ*FASTPALGRIDSIZ)
for(y=-FASTPALGRIDSIZ;y<=FASTPALGRIDSIZ;y+=FASTPALGRIDSIZ)
for(z=-1;z<=1;z++)
colscan[i++] = x+y+z;
i = colscan[13]; colscan[13] = colscan[26]; colscan[26] = i;
}
int main(int argc, char **argv)
{
char col, ch;
short orignumpalookups;
int fil, i, j, rscale, gscale, bscale;
char buf[65536];
ch = 13;
if (argc>1) {
if (argv[1][0] == '-') {
if (argv[1][1] == 't') { ch = 32; puts("Updating translucency table ONLY"); }
argc--;
argv++;
}
}
if ((argc != 3) && (argc != 6))
{
printf("TRANSPAL [-t] [numshades][trans#(0-inv,256-opa)][r][g][b] by Kenneth Silverman\n");
printf(" Ex #1: transpal 32 170 30 59 11 (I use these values in my BUILD demo)\n");
printf(" <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> The RGB scales are optional\n");
printf(" Ex #2: transpal 64 160\n\n");
printf("Once tables are generated, the optional -t switch determines what to save:\n");
printf(" Exclude -t to update both the shade table and transluscent table\n");
printf(" Include -t to update the transluscent table ONLY\n");
exit(0);
}
strcpy(palettefilename,"palette.dat");
numpalookups = atol(argv[1]);
transratio = atol(argv[2]);
if (argc == 6)
{
rscale = atol(argv[3]);
gscale = atol(argv[4]);
bscale = atol(argv[5]);
}
else
{
rscale = 30;
gscale = 59;
bscale = 11;
}
if ((numpalookups < 1) || (numpalookups > 256))
{ printf("Invalid number of shades\n"); exit(0); }
if ((transratio < 0) || (transratio > 256))
{ printf("Invalid transluscent ratio\n"); exit(0); }
if ((fil = Bopen(palettefilename,BO_BINARY|BO_RDONLY,BS_IREAD)) == -1)
{
printf("%s not found",palettefilename);
return(0);
}
Bread(fil,palette,768);
Bread(fil,&orignumpalookups,2); orignumpalookups = B_LITTLE16(orignumpalookups);
orignumpalookups = min(max(orignumpalookups,1),256);
Bread(fil,origpalookup,(int)orignumpalookups<<8);
Bclose(fil);
clearbuf(buf,65536>>2,0L);
initfastcolorlookup(rscale,gscale,bscale);
clearbuf(closestcol,262144>>2,0xffffffff);
for(i=0;i<numpalookups;i++)
for(j=0;j<256;j++)
{
col = getpalookup((char)i,(char)j);
palookup[(i<<8)+j] = col;
drawpixel(((((i<<1)+0)*320+(j+8))>>2)+buf,(int)col);
drawpixel(((((i<<1)+1)*320+(j+8))>>2)+buf,(int)col);
}
for(i=0;i<256;i++)
for(j=0;j<6;j++)
{
drawpixel((((j+132+0)*320+(i+8))>>2)+buf,i);
drawpixel((((i+132+8)*320+(j+0))>>2)+buf,i);
}
for(i=0;i<256;i++)
for(j=0;j<256;j++)
{
col = gettrans((char)i,(char)j,transratio);
transluc[(i<<8)+j] = col;
drawpixel((((j+132+8)*320+(i+8))>>2)+buf,(int)col);
}
if (ch == 13)
{
short s;
if ((fil = Bopen(palettefilename,BO_BINARY|BO_TRUNC|BO_CREAT|BO_WRONLY,BS_IREAD|BS_IWRITE)) == -1)
{ printf("Couldn't save file %s",palettefilename); return(0); }
Bwrite(fil,palette,768);
s = B_LITTLE16(numpalookups); Bwrite(fil,&s,2);
Bwrite(fil,palookup,numpalookups<<8);
Bwrite(fil,transluc,65536);
Bclose(fil);
printf("Shade table AND transluscent table updated\n");
}
else if (ch == 32)
{
short s;
if ((fil = Bopen(palettefilename,BO_BINARY|BO_TRUNC|BO_CREAT|BO_WRONLY,BS_IREAD|BS_IWRITE)) == -1)
{ printf("Couldn't save file %s",palettefilename); return(0); }
Bwrite(fil,palette,768);
s = B_LITTLE16(orignumpalookups); Bwrite(fil,&s,2);
Bwrite(fil,origpalookup,(int)orignumpalookups<<8);
Bwrite(fil,transluc,65536);
Bclose(fil);
printf("Transluscent table updated\n");
}
else
printf("Palette file wasn't touched\n");
return 0;
}