defont.c (1296B)
1 #include "u.h" 2 #include "lib.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 uint32*. 22 */ 23 p = (char*)defontdata; 24 n = (uintptr)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(uint32); 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 }