13 fprint(2, "usage: topng [-c 'comment'] [-g 'gamma'] [file]\n");
18 main(int argc, char *argv[])
31 II.fields_set |= II_COMMENT;
34 II.gamma = atof(ARGF());
37 II.fields_set |= II_GAMMA;
45 if(Binit(&bout, 1, OWRITE) < 0)
46 sysfatal("Binit failed: %r");
53 fd = open(argv[0], OREAD);
55 sysfatal("can't open %s: %r", argv[0]);
61 sysfatal("can't readimage %s: %r", filename);
64 err = memwritepng(&bout, i, &II);
68 fprint(2, "topng: %s\n", err);