1 #include <u.h>
2 #include <libc.h>
3 #include <draw.h>
4 #include <memdraw.h>
5
6 Memsubfont*
openmemsubfont(char * name)7 openmemsubfont(char *name)
8 {
9 Memsubfont *sf;
10 Memimage *i;
11 Fontchar *fc;
12 int fd, n;
13 char hdr[3*12+4+1];
14 uchar *p;
15
16 fd = open(name, OREAD);
17 if(fd < 0)
18 return nil;
19 p = nil;
20 i = readmemimage(fd);
21 if(i == nil)
22 goto Err;
23 if(read(fd, hdr, 3*12) != 3*12){
24 werrstr("openmemsubfont: header read error: %r");
25 goto Err;
26 }
27 n = atoi(hdr);
28 p = malloc(6*(n+1));
29 if(p == nil)
30 goto Err;
31 if(read(fd, p, 6*(n+1)) != 6*(n+1)){
32 werrstr("openmemsubfont: fontchar read error: %r");
33 goto Err;
34 }
35 fc = malloc(sizeof(Fontchar)*(n+1));
36 if(fc == nil)
37 goto Err;
38 _unpackinfo(fc, p, n);
39 sf = allocmemsubfont(name, n, atoi(hdr+12), atoi(hdr+24), fc, i);
40 if(sf == nil){
41 free(fc);
42 goto Err;
43 }
44 free(p);
45 return sf;
46 Err:
47 close(fd);
48 if (i != nil)
49 freememimage(i);
50 if (p != nil)
51 free(p);
52 return nil;
53 }
54