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author | rsc <devnull@localhost> | 2003-09-30 17:47:42 +0000 |
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committer | rsc <devnull@localhost> | 2003-09-30 17:47:42 +0000 |
commit | 76193d7cb0457807b2f0b95f909ab5de19480cd7 (patch) | |
tree | 97e538c7e38181431e90289a0fe8b6b7ce1f8f3c /src/libdraw/buildfont.c | |
parent | ed7c8e8d02c02bdbff1e88a6d8d1419f39af48ad (diff) | |
download | plan9port-76193d7cb0457807b2f0b95f909ab5de19480cd7.tar.gz plan9port-76193d7cb0457807b2f0b95f909ab5de19480cd7.tar.bz2 plan9port-76193d7cb0457807b2f0b95f909ab5de19480cd7.zip |
Initial revision
Diffstat (limited to 'src/libdraw/buildfont.c')
-rw-r--r-- | src/libdraw/buildfont.c | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/src/libdraw/buildfont.c b/src/libdraw/buildfont.c new file mode 100644 index 00000000..ba32e775 --- /dev/null +++ b/src/libdraw/buildfont.c @@ -0,0 +1,141 @@ +#include <u.h> +#include <libc.h> +#include <draw.h> + +static char* +skip(char *s) +{ + while(*s==' ' || *s=='\n' || *s=='\t') + s++; + return s; +} + +Font* +buildfont(Display *d, char *buf, char *name) +{ + Font *fnt; + Cachefont *c; + char *s, *t; + ulong min, max; + int offset; + char badform[] = "bad font format: number expected (char position %d)"; + + s = buf; + fnt = malloc(sizeof(Font)); + if(fnt == 0) + return 0; + memset(fnt, 0, sizeof(Font)); + fnt->display = d; + fnt->name = strdup(name); + fnt->ncache = NFCACHE+NFLOOK; + fnt->nsubf = NFSUBF; + fnt->cache = malloc(fnt->ncache * sizeof(fnt->cache[0])); + fnt->subf = malloc(fnt->nsubf * sizeof(fnt->subf[0])); + if(fnt->name==0 || fnt->cache==0 || fnt->subf==0){ + Err2: + free(fnt->name); + free(fnt->cache); + free(fnt->subf); + free(fnt->sub); + free(fnt); + return 0; + } + fnt->height = strtol(s, &s, 0); + s = skip(s); + fnt->ascent = strtol(s, &s, 0); + s = skip(s); + if(fnt->height<=0 || fnt->ascent<=0){ + werrstr("bad height or ascent in font file"); + goto Err2; + } + fnt->width = 0; + fnt->nsub = 0; + fnt->sub = 0; + + memset(fnt->subf, 0, fnt->nsubf * sizeof(fnt->subf[0])); + memset(fnt->cache, 0, fnt->ncache*sizeof(fnt->cache[0])); + fnt->age = 1; + do{ + /* must be looking at a number now */ + if(*s<'0' || '9'<*s){ + werrstr(badform, s-buf); + goto Err3; + } + min = strtol(s, &s, 0); + s = skip(s); + /* must be looking at a number now */ + if(*s<'0' || '9'<*s){ + werrstr(badform, s-buf); + goto Err3; + } + max = strtol(s, &s, 0); + s = skip(s); + if(*s==0 || min>=65536 || max>=65536 || min>max){ + werrstr("illegal subfont range"); + Err3: + freefont(fnt); + return 0; + } + t = s; + offset = strtol(s, &t, 0); + if(t>s && (*t==' ' || *t=='\t' || *t=='\n')) + s = skip(t); + else + offset = 0; + fnt->sub = realloc(fnt->sub, (fnt->nsub+1)*sizeof(Cachefont*)); + if(fnt->sub == 0){ + /* realloc manual says fnt->sub may have been destroyed */ + fnt->nsub = 0; + goto Err3; + } + c = malloc(sizeof(Cachefont)); + if(c == 0) + goto Err3; + fnt->sub[fnt->nsub] = c; + c->min = min; + c->max = max; + c->offset = offset; + t = s; + while(*s && *s!=' ' && *s!='\n' && *s!='\t') + s++; + *s++ = 0; + c->subfontname = 0; + c->name = strdup(t); + if(c->name == 0){ + free(c); + goto Err3; + } + s = skip(s); + fnt->nsub++; + }while(*s); + return fnt; +} + +void +freefont(Font *f) +{ + int i; + Cachefont *c; + Subfont *s; + + if(f == 0) + return; + + for(i=0; i<f->nsub; i++){ + c = f->sub[i]; + free(c->subfontname); + free(c->name); + free(c); + } + for(i=0; i<f->nsubf; i++){ + s = f->subf[i].f; + if(s && s!=display->defaultsubfont) + freesubfont(s); + } + freeimage(f->cacheimage); + free(f->name); + free(f->cache); + free(f->subf); + free(f->sub); + free(f); +} |