util/palette2c.c

   1 #include <stdio.h>
   2
   3 int main(int argc, char *argv[])
   4 {
   5   FILE *fp;
   6   unsigned char pal[768];
   7   int i;
   8   int rmin=255, rmax=0, gmin=255, gmax=0, bmin=255, bmax=0;
   9
  10   if (argc!=2) {
  11         printf("Usage: %s <filename>\n", argv[0]);
  12         return 1;
  13   }
  14
  15   fp=fopen(argv[1], "rb");
  16   if (!fp) {
  17         printf("Cannot open %s!\n", argv[1]);
  18         return 2;
  19   }
  20   fseek(fp, 0, SEEK_END);
  21   if (ftell(fp)!=768) {
  22         printf("File %s should be 768 bytes in size!\n", argv[1]);
  23         fclose(fp);
  24         return 3;
  25   }
  26   fseek(fp, 0, SEEK_SET);
  27   fread(pal, 1, 768, fp);
  28   fclose(fp);
  29
  30   for(i=0; i<256; i++) {
  31         if (i%8==0)
  32           printf("\n");
  33         if (i%16==0)
  34           printf("/* %x */\n", i/16);
  35         printf("0x%02x%02x%02x, ", pal[i*3], pal[i*3+1], pal[i*3+2]);
  36
  37         if (pal[i*3]<rmin)
  38                 rmin=pal[i*3];
  39         if (pal[i*3+1]<gmin)
  40                 gmin=pal[i*3+1];
  41         if (pal[i*3+2]<bmin)
  42                 bmin=pal[i*3+2];
  43
  44         if (pal[i*3]>rmax)
  45                 rmax=pal[i*3];
  46         if (pal[i*3+1]>gmax)
  47                 gmax=pal[i*3+1];
  48         if (pal[i*3+2]>bmax)
  49                 bmax=pal[i*3+2];
  50   }
  51   printf("\n");
  52   printf("/* r: %d-%d, g: %d-%d, b: %d-%d */\n", rmin, rmax, gmin, gmax, bmin, bmax);
  53
  54   return 0;
  55 }