STBIDEF int stbi_is_hdr_from_file(FILE *f)
{
   #ifndef STBI_NO_HDR
   long pos = ftell(f);
   int res;
   stbi__context s;
   stbi__start_file(&s,f);
   res = stbi__hdr_test(&s);
   fseek(f, pos, SEEK_SET);
   return res;
   #else
   STBI_NOTUSED(f);
   return 0;
   #endif
}
Unknown