Function bm_iff_alloc_file

bitmap/iff.cpp:502–545

Loads an iff into a structure, allocs bitmap memory and converts 8 bit iff file into 16bit bitmap Returns bitmap handle on success, or -1 if failed

// 16bit bitmap
// Returns bitmap handle on success, or -1 if failed
int bm_iff_alloc_file(CFILE *ifile) {
  int ret; // return code
  iff_bitmap_header bmheader;
  int src_bm;
  char cur_sig[4];

  // Ignore FORM and form length
  cf_ReadInt(ifile);
  cf_ReadInt(ifile);

  // check if this an ILBM

  for (int i = 0; i < 4; i++)
    cur_sig[i] = cf_ReadByte(ifile);

  if (strncmp("PBM ", cur_sig, 4)) {
    mprintf(0, "IFF file isn't a PBM...aborting.\n");
    return -1;
  }
  if (!strncmp("PBM ", cur_sig, 4))
    bmheader.type = TYPE_PBM;
  else
    Int3(); // Huh? Get Jason!

  ret = bm_iff_parse_file(ifile, &bmheader, NULL);

  if (ret != IFF_NO_ERROR) {
    mprintf(0, "Couldn't load IFF file.\n");
    return -1;
  }

  // Alloc our bitmap
  src_bm = bm_AllocBitmap(bmheader.w, bmheader.h, 0);
  if (src_bm < 0) {
    mem_free(bmheader.raw_data);
    return -1;
  }

  // Convert our 8 bit bitmap to 16bit
  bm_iff_convert_8_to_16(src_bm, &bmheader);
  free(bmheader.raw_data);

  return src_bm;
}

// returns number of bitmaps or -1 on error
int bm_iff_read_animbrush(const char *ifilename, int *bm_list) {