1 28994509 2004-04-21 devnull #include <u.h>
 2 28994509 2004-04-21 devnull #include <libc.h>
 3 28994509 2004-04-21 devnull #include <draw.h>
 4 28994509 2004-04-21 devnull #include <memdraw.h>
 5 28994509 2004-04-21 devnull #include <ctype.h>
 6 28994509 2004-04-21 devnull #include <bio.h>
 7 28994509 2004-04-21 devnull #include <flate.h>
 8 28994509 2004-04-21 devnull #include "imagefile.h"
 9 28994509 2004-04-21 devnull 
10 28994509 2004-04-21 devnull void
11 28994509 2004-04-21 devnull usage(void)
12 28994509 2004-04-21 devnull {
13 28994509 2004-04-21 devnull 	fprint(2, "usage: topng [-c 'comment'] [-g 'gamma'] [file]\n");
14 28994509 2004-04-21 devnull 	exits("usage");
15 28994509 2004-04-21 devnull }
16 28994509 2004-04-21 devnull 
17 28994509 2004-04-21 devnull void
18 28994509 2004-04-21 devnull main(int argc, char *argv[])
19 28994509 2004-04-21 devnull {
20 28994509 2004-04-21 devnull 	Biobuf bout;
21 28994509 2004-04-21 devnull 	Memimage *i;
22 28994509 2004-04-21 devnull 	int fd;
23 28994509 2004-04-21 devnull 	char *err, *filename;
24 28994509 2004-04-21 devnull 	ImageInfo II;
25 28994509 2004-04-21 devnull 
26 28994509 2004-04-21 devnull 	ARGBEGIN{
27 28994509 2004-04-21 devnull 	case 'c':
28 28994509 2004-04-21 devnull 		II.comment = ARGF();
29 28994509 2004-04-21 devnull 		if(II.comment == nil)
30 28994509 2004-04-21 devnull 			usage();
31 28994509 2004-04-21 devnull 		II.fields_set |= II_COMMENT;
32 28994509 2004-04-21 devnull 		break;
33 28994509 2004-04-21 devnull 	case 'g':
34 28994509 2004-04-21 devnull 		II.gamma = atof(ARGF());
35 28994509 2004-04-21 devnull 		if(II.gamma == 0.)
36 28994509 2004-04-21 devnull 			usage();
37 28994509 2004-04-21 devnull 		II.fields_set |= II_GAMMA;
38 28994509 2004-04-21 devnull 		break;
39 28994509 2004-04-21 devnull 	case 't':
40 28994509 2004-04-21 devnull 		break;
41 28994509 2004-04-21 devnull 	default:
42 28994509 2004-04-21 devnull 		usage();
43 28994509 2004-04-21 devnull 	}ARGEND
44 28994509 2004-04-21 devnull 
45 28994509 2004-04-21 devnull 	if(Binit(&bout, 1, OWRITE) < 0)
46 28994509 2004-04-21 devnull 		sysfatal("Binit failed: %r");
47 28994509 2004-04-21 devnull 	memimageinit();
48 28994509 2004-04-21 devnull 
49 28994509 2004-04-21 devnull 	if(argc == 0){
50 28994509 2004-04-21 devnull 		fd = 0;
51 28994509 2004-04-21 devnull 		filename = "<stdin>";
52 28994509 2004-04-21 devnull 	}else{
53 28994509 2004-04-21 devnull 		fd = open(argv[0], OREAD);
54 28994509 2004-04-21 devnull 		if(fd < 0)
55 28994509 2004-04-21 devnull 			sysfatal("can't open %s: %r", argv[0]);
56 28994509 2004-04-21 devnull 		filename = argv[0];
57 28994509 2004-04-21 devnull 	}
58 28994509 2004-04-21 devnull 
59 28994509 2004-04-21 devnull 	i = readmemimage(fd);
60 28994509 2004-04-21 devnull 	if(i == nil)
61 28994509 2004-04-21 devnull 		sysfatal("can't readimage %s: %r", filename);
62 28994509 2004-04-21 devnull 	close(fd);
63 28994509 2004-04-21 devnull 
64 28994509 2004-04-21 devnull 	err = memwritepng(&bout, i, &II);
65 28994509 2004-04-21 devnull 	freememimage(i);
66 28994509 2004-04-21 devnull 
67 28994509 2004-04-21 devnull 	if(err != nil)
68 28994509 2004-04-21 devnull 		fprint(2, "topng: %s\n", err);
69 28994509 2004-04-21 devnull 	exits(err);
70 28994509 2004-04-21 devnull }