struct jpeg_source_mgr mgr;
FILE*fi = fopen(filename, "rb");
- if(!fi)
+ if(!fi) {
+ fprintf(stderr, "Couldn't open file %s\n", filename);
return 0;
- fseek(fi, SEEK_END, 0);
- long filesize = ftell(fi);
- fseek(fi, SEEK_SET, 0);
- fclose(fi);
+ }
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_decompress(&cinfo);