| 1 |
greg |
1.1 |
/* Copyright (c) 1987 Regents of the University of California */ |
| 2 |
|
|
|
| 3 |
|
|
#ifndef lint |
| 4 |
|
|
static char SCCSid[] = "$SunId$ LBL"; |
| 5 |
|
|
#endif |
| 6 |
|
|
|
| 7 |
|
|
/* |
| 8 |
|
|
* colorscale.c - program to produce color pallets |
| 9 |
|
|
* |
| 10 |
|
|
* 9/9/87 |
| 11 |
|
|
*/ |
| 12 |
|
|
|
| 13 |
|
|
#include <stdio.h> |
| 14 |
|
|
|
| 15 |
|
|
#include "color.h" |
| 16 |
|
|
|
| 17 |
|
|
int primary = -1; |
| 18 |
|
|
double prival = 0.0; |
| 19 |
|
|
|
| 20 |
|
|
|
| 21 |
|
|
main(argc, argv) |
| 22 |
|
|
int argc; |
| 23 |
|
|
char *argv[]; |
| 24 |
|
|
{ |
| 25 |
|
|
int i; |
| 26 |
|
|
|
| 27 |
|
|
for (i = 1; i < argc && argv[i][0] == '-'; i++) |
| 28 |
|
|
switch (argv[i][1]) { |
| 29 |
|
|
case 'r': |
| 30 |
|
|
primary = RED; |
| 31 |
|
|
prival = atof(argv[++i]); |
| 32 |
|
|
break; |
| 33 |
|
|
case 'g': |
| 34 |
|
|
primary = GRN; |
| 35 |
|
|
prival = atof(argv[++i]); |
| 36 |
|
|
break; |
| 37 |
|
|
case 'b': |
| 38 |
|
|
primary = BLU; |
| 39 |
|
|
prival = atof(argv[++i]); |
| 40 |
|
|
break; |
| 41 |
|
|
default: |
| 42 |
|
|
goto userr; |
| 43 |
|
|
} |
| 44 |
|
|
if (primary < 0 || i < argc) |
| 45 |
|
|
goto userr; |
| 46 |
|
|
printargs(argc, argv, stdout); |
| 47 |
|
|
printf("\n"); |
| 48 |
|
|
printf("-Y 256 +X 256\n"); |
| 49 |
|
|
colorscale(); |
| 50 |
|
|
exit(0); |
| 51 |
|
|
userr: |
| 52 |
|
|
fprintf(stderr, "Usage: %s -r|-g|-b value\n", argv[0]); |
| 53 |
|
|
exit(1); |
| 54 |
|
|
} |
| 55 |
|
|
|
| 56 |
|
|
|
| 57 |
|
|
colorscale() /* output our color scale */ |
| 58 |
|
|
{ |
| 59 |
|
|
COLOR scanline[256]; |
| 60 |
|
|
int j; |
| 61 |
|
|
register int i; |
| 62 |
|
|
|
| 63 |
|
|
for (j = 256-1; j >= 0; j--) { |
| 64 |
|
|
for (i = 0; i < 256; i++) |
| 65 |
|
|
switch (primary) { |
| 66 |
|
|
case RED: |
| 67 |
|
|
setcolor(scanline[i],prival,i/256.0,j/256.0); |
| 68 |
|
|
break; |
| 69 |
|
|
case GRN: |
| 70 |
|
|
setcolor(scanline[i],i/256.0,prival,j/256.0); |
| 71 |
|
|
break; |
| 72 |
|
|
case BLU: |
| 73 |
|
|
setcolor(scanline[i],i/256.0,j/256.0,prival); |
| 74 |
|
|
break; |
| 75 |
|
|
} |
| 76 |
|
|
if (fwritescan(scanline, 256, stdout) < 0) |
| 77 |
|
|
goto writerr; |
| 78 |
|
|
} |
| 79 |
|
|
return; |
| 80 |
|
|
writerr: |
| 81 |
|
|
fprintf(stderr, "write error in colorscale\n"); |
| 82 |
|
|
exit(1); |
| 83 |
|
|
} |
| 84 |
|
|
|
| 85 |
|
|
|
| 86 |
|
|
printargs(ac, av, fp) /* print arguments to a file */ |
| 87 |
|
|
int ac; |
| 88 |
|
|
char **av; |
| 89 |
|
|
FILE *fp; |
| 90 |
|
|
{ |
| 91 |
|
|
while (ac-- > 0) { |
| 92 |
|
|
fputs(*av++, fp); |
| 93 |
|
|
putc(' ', fp); |
| 94 |
|
|
} |
| 95 |
|
|
putc('\n', fp); |
| 96 |
|
|
} |
