git.mutantstargoat.com Git - dosdemo/blob - tools/img2bin/img2bin.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4 #include <stdint.h>
   5 #include <errno.h>
   6 #include "imago2.h"
   7
   8 int proc_image(const char *fname);
   9
  10 int main(int argc, char **argv)
  11 {
  12         int i;
  13
  14         for(i=1; i<argc; i++) {
  15                 if(proc_image(argv[i]) == -1) {
  16                         return 1;
  17                 }
  18         }
  19         return 0;
  20 }
  21
  22 int proc_image(const char *fname)
  23 {
  24         int i, xsz, ysz, npixels, len;
  25         unsigned char *pixels24, *sptr;
  26         uint16_t *pixels16, *dptr;
  27         char *outfname, *suffix;
  28         FILE *out;
  29
  30         len = strlen(fname);
  31         outfname = alloca(len + 4);
  32         memcpy(outfname, fname, len + 1);
  33         if((suffix = strrchr(outfname, '.')) && suffix > outfname) {
  34                 strcpy(suffix, ".img");
  35         } else {
  36                 strcpy(outfname + len, ".img");
  37         }
  38
  39         if(!(pixels24 = img_load_pixels(fname, &xsz, &ysz, IMG_FMT_RGB24))) {
  40                 fprintf(stderr, "failed to load image: %s\n", fname);
  41                 return -1;
  42         }
  43         npixels = xsz * ysz;
  44         if(!(pixels16 = malloc(npixels * 2))) {
  45                 perror("failed to allocate output image buffer");
  46                 img_free_pixels(pixels24);
  47                 return -1;
  48         }
  49
  50         if(!(out = fopen(outfname, "wb"))) {
  51                 fprintf(stderr, "failed to open %s for writing: %s\n", outfname, strerror(errno));
  52                 img_free_pixels(pixels24);
  53                 free(pixels16);
  54                 return -1;
  55         }
  56
  57         sptr = pixels24;
  58         dptr = pixels16;
  59         for(i=0; i<npixels; i++) {
  60                 int r = *sptr++ >> 3;
  61                 int g = *sptr++ >> 2;
  62                 int b = *sptr++ >> 3;
  63                 *dptr++ = (r << 11) | (g << 5) | b;
  64         }
  65         img_free_pixels(pixels24);
  66
  67         fwrite(pixels16, 2, npixels, out);
  68         fclose(out);
  69         free(pixels16);
  70         return 0;
  71 }