-#include <pam.h>
-#include <stdint.h>
-#include <inttypes.h>
-#include <assert.h>
-#include <string.h>
-
-#define eassert assert
-
-typedef struct {
- unsigned long rgb; /* on screen */
- char c; /* canonical */
-} CanonColourInfo;
-
-static const CanonColourInfo canoncolourinfos[]= {
- { 0x475A5E, '*' }, /* edge */
- { 0x7D9094, '+' }, /* interbox */
- { 0xBDC5BF, ' ' }, /* background - pale */
- { 0xADB5AF, ' ' }, /* background - dark */
- { 0x000000, 'o' }, /* foreground */
- { 0xD4B356, ' ' }, /* background (cursor) */
- { 0xFFFFFF, 'o' }, /* foreground (cursor) */
- { 0,0 }
-};
-
-static int height, width;
-static char *image;
-
-static void load_image_and_canonify(void) {
- struct pam inpam;
- unsigned char rgb[3];
- int x,y,r;
- const CanonColourInfo *cci;
-
- pnm_readpaminit(stdin, &inpam, sizeof(inpam));
- height= inpam.height;
- width= inpam.width;
- eassert(inpam.maxval == 255);
- eassert(inpam.bytes_per_sample == 1);
-
- image= malloc(width*height);
- eassert(image);
- memset(image,'?',width*height);
-
- for (y=0; y<height; y++) {
- for (x=0; x<width; x++) {
- r= fread(&rgb,1,3,stdin); eassert(r==3);
- unsigned long rgb_l=
- ((unsigned long)rgb[0]<<16) |
- ((unsigned long)rgb[1]<<8) |
- (rgb[2]);
- for (cci=canoncolourinfos; cci->c; cci++)
- if (cci->rgb == rgb_l) {
- image[y*width + x]= cci->c;
- break;
- }
- if (y==234 && x==82) {
- printf("y=%d/%d x=%d/%d rgb=%d,%d,%d rgb_l=%lx c=%c\n",
- y,height,x,width, rgb[0],rgb[1],rgb[2], rgb_l, image[y*width+x]);
- }
- }
- r= fwrite(image + y*width, 1,width, stdout); eassert(r==width);
- putchar('\n');
- }
- eassert(!fflush(stdout));
- eassert(!ferror(stdout));