#include <assert.h>
#include "image.h"
+enum {
+ MODE_PIXELS,
+ MODE_CMAP,
+ MODE_PNG,
+ MODE_INFO
+};
+
+void dump_colormap(struct image *img, int text, FILE *fp);
void print_usage(const char *argv0);
int main(int argc, char **argv)
{
- int i, mode = 0;
+ int i, j, mode = 0;
int text = 0;
int renibble = 0;
char *outfname = 0;
+ char *slut_fname = 0, *cmap_fname = 0;
char *infiles[256];
int num_infiles = 0;
struct image img, tmpimg;
FILE *out = stdout;
+ FILE *aux_out;
+ int *shade_lut = 0;
+ int *lutptr;
+ int shade_levels = 8;
+ int maxcol = 0;
+ int lvl;
for(i=1; i<argc; i++) {
if(argv[i][0] == '-') {
if(argv[i][2] == 0) {
switch(argv[i][1]) {
+ case 'P':
+ mode = MODE_PNG;
+ break;
+
case 'p':
- mode = 0;
+ mode = MODE_PIXELS;
break;
case 'c':
- mode = 1;
+ mode = MODE_CMAP;
break;
case 'i':
- mode = 2;
+ mode = MODE_INFO;
+ break;
+
+ case 'C':
+ if(!argv[++i] || (maxcol = atoi(argv[i])) < 2 || maxcol > 256) {
+ fprintf(stderr, "-C must be followed by the number of colors to reduce down to\n");
+ return 1;
+ }
+ break;
+
+ case 's':
+ if(!argv[++i] || (shade_levels = atoi(argv[i])) == 0) {
+ fprintf(stderr, "-s must be followed by the number of shade levels\n");
+ return 1;
+ }
break;
case 't':
return 1;
}
} else {
- fprintf(stderr, "invalid option: %s\n", argv[i]);
- print_usage(argv[0]);
- return 1;
+ if(strcmp(argv[i], "-oc") == 0) {
+ if(!argv[++i]) {
+ fprintf(stderr, "-oc must be followed by a filename\n");
+ return 1;
+ }
+ cmap_fname = argv[i];
+
+ } else if(strcmp(argv[i], "-os") == 0) {
+ if(!argv[++i]) {
+ fprintf(stderr, "-os must be followed by a filename\n");
+ return 1;
+ }
+ slut_fname = argv[i];
+
+ } else {
+ fprintf(stderr, "invalid option: %s\n", argv[i]);
+ print_usage(argv[0]);
+ return 1;
+ }
}
} else {
infiles[num_infiles++] = argv[i];
overlay_key(&tmpimg, 0, &img);
}
+ /* generate shading LUT and quantize image as necessary */
+ if(slut_fname) {
+ if(img.bpp > 8) {
+ fprintf(stderr, "shading LUT generation is only supported for indexed color images\n");
+ return 1;
+ }
+ if(!(aux_out = fopen(slut_fname, "wb"))) {
+ fprintf(stderr, "failed to open shading LUT output file: %s: %s\n", slut_fname, strerror(errno));
+ return 1;
+ }
+
+ if(!maxcol) maxcol = 256;
+
+ if(!(shade_lut = malloc(maxcol * shade_levels * sizeof *shade_lut))) {
+ fprintf(stderr, "failed to allocate shading look-up table\n");
+ return 1;
+ }
+
+ gen_shades(&img, shade_levels, maxcol, shade_lut);
+
+ lutptr = shade_lut;
+ for(i=0; i<maxcol; i++) {
+ for(j=0; j<shade_levels; j++) {
+ lvl = lutptr[shade_levels - j - 1];
+ if(text) {
+ fprintf(aux_out, "%d%c", lvl, j < shade_levels - 1 ? ' ' : '\n');
+ } else {
+ fputc(lvl, aux_out);
+ }
+ }
+ lutptr += shade_levels;
+ }
+ fclose(aux_out);
+
+ } else if(maxcol) {
+ /* perform any color reductions if requested */
+ if(img.bpp <= 8 && img.cmap_ncolors <= maxcol) {
+ fprintf(stderr, "requested reduction to %d colors, but image has %d colors\n", maxcol, img.cmap_ncolors);
+ return 1;
+ }
+ quantize_image(&img, maxcol);
+ }
+
+ if(cmap_fname) {
+ if(img.bpp > 8) {
+ fprintf(stderr, "colormap output works only for indexed color images\n");
+ return 1;
+ }
+ if(!(aux_out = fopen(cmap_fname, "wb"))) {
+ fprintf(stderr, "failed to open colormap output file: %s: %s\n", cmap_fname, strerror(errno));
+ return 1;
+ }
+ dump_colormap(&img, text, aux_out);
+ fclose(aux_out);
+ }
+
if(img.bpp == 4 && renibble) {
unsigned char *ptr = img.pixels;
for(i=0; i<img.width * img.height; i++) {
}
switch(mode) {
- case 0:
+ case MODE_PNG:
+ save_image_file(&img, out);
+ break;
+
+ case MODE_PIXELS:
fwrite(img.pixels, 1, img.scansz * img.height, out);
break;
- case 1:
- if(text) {
- for(i=0; i<img.cmap_ncolors; i++) {
- printf("%d %d %d\n", img.cmap[i].r, img.cmap[i].g, img.cmap[i].b);
- }
- } else {
- /*fwrite(img.cmap, sizeof img.cmap[0], img.cmap_ncolors, out);*/
- fwrite(img.cmap, sizeof img.cmap[0], 1 << img.bpp, out);
- }
+ case MODE_CMAP:
+ dump_colormap(&img, text, out);
break;
- case 2:
+ case MODE_INFO:
printf("size: %dx%d\n", img.width, img.height);
printf("bit depth: %d\n", img.bpp);
printf("scanline size: %d bytes\n", img.scansz);
return 0;
}
+void dump_colormap(struct image *img, int text, FILE *fp)
+{
+ int i;
+
+ if(text) {
+ for(i=0; i<img->cmap_ncolors; i++) {
+ fprintf(fp, "%d %d %d\n", img->cmap[i].r, img->cmap[i].g, img->cmap[i].b);
+ }
+ } else {
+ fwrite(img->cmap, sizeof img->cmap[0], 1 << img->bpp, fp);
+ }
+}
+
void print_usage(const char *argv0)
{
printf("Usage: %s [options] <input file>\n", argv0);
printf("Options:\n");
printf(" -o <output file>: specify output file (default: stdout)\n");
+ printf(" -oc <cmap file>: output colormap to separate file\n");
+ printf(" -os <lut file>: generate and output shading LUT\n");
printf(" -p: dump pixels (default)\n");
+ printf(" -P: output in PNG format\n");
printf(" -c: dump colormap (palette) entries\n");
+ printf(" -C <colors>: reduce image down to specified number of colors\n");
+ printf(" -s <shade levels>: used in conjunction with -os (default: 8)\n");
printf(" -i: print image information\n");
- printf(" -t: dump as text\n");
+ printf(" -t: output as text when possible\n");
printf(" -n: swap the order of nibbles (for 4bpp)\n");
printf(" -h: print usage and exit\n");
}
projects / gbajam21 / blobdiff