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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
/* chars to use for colors */
static const char p[] = "0123456789"
"abcdefghijklmnopqrstuvwxyz"
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"!@#$%^&*()_+-=`~[]{}|;:',<.>/? ";
/* number of chars excl NIL */
static const int q = sizeof(p) - 1;
int main(int argc, char **argv) {
unsigned int width, height, ncolors, cpp, i, j;
if (argc != 5) {
fprintf(stderr, "Usage: %s width height ncolors cpp\n", argv[0]);
return 1;
}
/*
width = 1600;
height = 900;
ncolors = width * height / 1024;
cpp = 3;
*/
width = strtoul(argv[1], NULL, 0);
height= strtoul(argv[2], NULL, 0);
ncolors=strtoul(argv[3], NULL, 0);
cpp = strtoul(argv[4], NULL, 0);
printf(
"/* XPM */\n"
"static char *picture[] = {\n"
"/* columns rows colors chars-per-pixel */\n"
"\"%d %d %d %d \",\n"
, width, height, ncolors, cpp);
const char *fmt;
switch (cpp) {
case 1: fmt = "%c"; break;
case 2: fmt = "%c%c"; break;
case 3: fmt = "%c%c%c"; break;
default:fmt = "%c%c%c%c"; break;
}
for (i = 0; i<ncolors; ++i) {
putchar('"');
printf(fmt, p[i%q], p[i/q%q], p[i/q/q%q], p[i/q/q/q%q]);
printf(" c #%06x\",\n", 256 * 256 * 256 * i / ncolors);
}
puts("/* pixels */");
for (i = 0; i<height; ++i) {
putchar('"');
for (j = 0; j<width; ++j) {
unsigned int n = (i * width + j) % ncolors;
printf(fmt, p[n%q], p[n/q%q], p[n/q/q%q], p[n/q/q/q%q]);
}
if (i < height - 1) puts("\",");
else puts("\"");
}
puts("};");
return 0;
}
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