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/* Written by Peter Ekberg, peda@lysator.liu.se */
#ifdef HAVE_CONFIG_H
#include "../src/config.h"
#endif
#if defined(HAVE_GETOPT_H) && defined(HAVE_GETOPT_LONG_ONLY)
# include <getopt.h>
#elif !defined(HAVE_GETOPT_LONG_ONLY)
# include "../src/getopt.h"
#endif
#include <stdlib.h>
#include <stdio.h>
#include <pnm.h>
pixel **picture;
int cols;
int rows;
pixval maxval;
int maxcolors = 256;
pixel *colors;
char *name = NULL;
int
extractcolors(pixel **picture, pixel *colors)
{
int c=0;
int x=0, y=0;
int i;
pixel p;
while(c<maxcolors && y<rows) {
p = picture[y][x];
for(i=0; i<c; i++)
if(PPM_EQUAL(p, colors[i]))
break;
if(i==c) {
colors[c] = p;
c++;
}
if(c==maxcolors)
return(0);
if(++x == cols) {
++y;
x=0;
}
}
return(c);
}
void
write_c(FILE *f, pixel **picture, pixel *colors,
int cols, int rows, int maxcolors)
{
int x=0, y=0;
int i;
pixel p;
fprintf(f,
"\n/* Automatically generated by the program ppm2c version " VERSION
"\n written by Peter Ekberg, peda@lysator.liu.se */\n");
fprintf(f, "\nunsigned int %s_nr_colors = %d;", name, maxcolors);
fprintf(f, "\nunsigned int %s_cols = %d;", name, cols);
fprintf(f, "\nunsigned int %s_rows = %d;\n", name, rows);
fprintf(f, "\nunsigned char %s_colors[] = {\n\t", name);
for(i=0; i<maxcolors; i++) {
p = colors[i];
fprintf(f, "0x%02x, 0x%02x, 0x%02x",
PPM_GETR(p), PPM_GETG(p), PPM_GETB(p));
if(i != maxcolors-1)
fprintf(f, ",\n\t");
}
fprintf(f, "};\n\nunsigned char %s_pixels[] = {\n\t", name);
while(y<rows) {
p = picture[y][x];
for(i=0; i<maxcolors; i++)
if(PPM_EQUAL(p, colors[i])) {
fprintf(f, "0x%02x", i);
break;
}
if(++x == cols) {
++y;
x=0;
}
if(y<rows) {
if(x%8==0)
fprintf(f, ",\n\t");
else
fprintf(f, ", ");
}
}
fprintf(f, " };\n");
}
int
string_to_int(int *i, char *s)
{
int v;
char *end;
if(!*s)
return(-1);
v = strtol(s, &end, 10);
if(*end)
return(-1);
*i = v;
return(0);
}
int
main(int argc, char *argv[])
{
int optc;
int c;
do {
static struct option longopts[] = {
{ "version", 0, 0, 'v' },
{ "help", 0, 0, 'h' },
{ "maxcolors", 1, 0, 'm' },
{ "name", 1, 0, 'n' },
{ 0, 0, 0, 0 },
};
optc = getopt_long(argc, argv, "vhm:n:", longopts, (int *)0);
switch(optc) {
case -1:
break;
case 'v':
printf("ppm2c: version " VERSION "\n");
exit(0);
case 'h':
printf("ppm2c: version " VERSION "\n");
printf("options:\n"
" -v --version Display the version.\n"
" -h --help Display this text.\n"
" -m --maxcolors Maximum allowed colors (default 256).\n"
" -n --name The base name of the C identifiers.\n");
exit(0);
case 'm':
if(string_to_int(&maxcolors, optarg) || maxcolors<1 || maxcolors>256) {
fprintf(stderr, "ppm2c: illegal argument to option '-m'\n");
exit(1);
}
break;
case 'n':
name = strdup(optarg);
if(!name) {
fprintf(stderr, "ppm2c: insufficient memory\n");
exit(1);
}
break;
default:
fprintf(stderr, "ppm2c: bad usage (see 'ppm2c --help')\n");
exit(1);
}
} while(optc != -1);
if(name == NULL) {
fprintf(stderr,
"ppm2c: must specify a base name for the C identifiers.\n");
exit(1);
}
picture = ppm_readppm(stdin, &cols, &rows, &maxval);
colors = (pixel *)malloc(maxcolors * sizeof(pixel));
if(!colors) {
fprintf(stderr, "ppm2c: insufficient memory\n");
exit(1);
}
c = extractcolors(picture, colors);
if(!c) {
fprintf(stderr, "ppm2c: to many colors in picture\n");
exit(1);
}
write_c(stdout, picture, colors, cols, rows, c);
return(0);
}
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