1 #include <u.h>
2 #include <libc.h>
3 #include <draw.h>
4 #include <memdraw.h>
5 #include <ctype.h>
6 #include <bio.h>
7 #include <flate.h>
8 #include "imagefile.h"
9
10 void
usage(void)11 usage(void)
12 {
13 fprint(2, "usage: topng [-c 'comment'] [-g 'gamma'] [file]\n");
14 exits("usage");
15 }
16
17 void
main(int argc,char * argv[])18 main(int argc, char *argv[])
19 {
20 Biobuf bout;
21 Memimage *i;
22 int fd;
23 char *err, *filename;
24 ImageInfo II;
25
26 ARGBEGIN{
27 case 'c':
28 II.comment = ARGF();
29 if(II.comment == nil)
30 usage();
31 II.fields_set |= II_COMMENT;
32 break;
33 case 'g':
34 II.gamma = atof(ARGF());
35 if(II.gamma == 0.)
36 usage();
37 II.fields_set |= II_GAMMA;
38 break;
39 case 't':
40 break;
41 default:
42 usage();
43 }ARGEND
44
45 if(Binit(&bout, 1, OWRITE) < 0)
46 sysfatal("Binit failed: %r");
47 memimageinit();
48
49 if(argc == 0){
50 fd = 0;
51 filename = "<stdin>";
52 }else{
53 fd = open(argv[0], OREAD);
54 if(fd < 0)
55 sysfatal("can't open %s: %r", argv[0]);
56 filename = argv[0];
57 }
58
59 i = readmemimage(fd);
60 if(i == nil)
61 sysfatal("can't readimage %s: %r", filename);
62 close(fd);
63
64 err = memwritepng(&bout, i, &II);
65 freememimage(i);
66
67 if(err != nil)
68 fprint(2, "topng: %s\n", err);
69 exits(err);
70 }
71