| rsc | 76193d7 | 2003-09-30 17:47:42 +0000 | [diff] [blame] | 1 | #include <u.h> |
| 2 | #include <libc.h> |
| 3 | #include <draw.h> |
| 4 | #include <memdraw.h> |
| 5 | |
| 6 | Memsubfont* |
| 7 | getmemdefont(void) |
| 8 | { |
| 9 | char *hdr, *p; |
| 10 | int n; |
| 11 | Fontchar *fc; |
| 12 | Memsubfont *f; |
| 13 | int ld; |
| 14 | Rectangle r; |
| 15 | Memdata *md; |
| 16 | Memimage *i; |
| 17 | |
| 18 | /* |
| 19 | * make sure data is word-aligned. this is true with Plan 9 compilers |
| 20 | * but not in general. the byte order is right because the data is |
| 21 | * declared as char*, not u32int*. |
| 22 | */ |
| 23 | p = (char*)defontdata; |
| 24 | n = (u32int)p & 3; |
| 25 | if(n != 0){ |
| 26 | memmove(p+(4-n), p, sizeofdefont-n); |
| 27 | p += 4-n; |
| 28 | } |
| 29 | ld = atoi(p+0*12); |
| 30 | r.min.x = atoi(p+1*12); |
| 31 | r.min.y = atoi(p+2*12); |
| 32 | r.max.x = atoi(p+3*12); |
| 33 | r.max.y = atoi(p+4*12); |
| 34 | |
| 35 | md = mallocz(sizeof(Memdata), 1); |
| 36 | if(md == nil) |
| 37 | return nil; |
| 38 | |
| 39 | p += 5*12; |
| 40 | |
| 41 | md->base = nil; /* so freememimage doesn't free p */ |
| 42 | md->bdata = (uchar*)p; /* ick */ |
| 43 | md->ref = 1; |
| 44 | md->allocd = 1; /* so freememimage does free md */ |
| 45 | |
| 46 | i = allocmemimaged(r, drawld2chan[ld], md, nil); |
| 47 | if(i == nil){ |
| 48 | free(md); |
| 49 | return nil; |
| 50 | } |
| 51 | |
| 52 | hdr = p+Dy(r)*i->width*sizeof(u32int); |
| 53 | n = atoi(hdr); |
| 54 | p = hdr+3*12; |
| 55 | fc = malloc(sizeof(Fontchar)*(n+1)); |
| 56 | if(fc == 0){ |
| 57 | freememimage(i); |
| 58 | return 0; |
| 59 | } |
| 60 | _unpackinfo(fc, (uchar*)p, n); |
| 61 | f = allocmemsubfont("*default*", n, atoi(hdr+12), atoi(hdr+24), fc, i); |
| 62 | if(f == 0){ |
| 63 | freememimage(i); |
| 64 | free(fc); |
| 65 | return 0; |
| 66 | } |
| 67 | return f; |
| 68 | } |
