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#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->scale = 1;
fnt->display = d;
fnt->name = strdup(name);
fnt->namespec = 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->namespec);
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>Runemax || max>Runemax || 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)
freesubfont(s);
}
freeimage(f->cacheimage);
free(f->name);
free(f->namespec);
free(f->cache);
free(f->subf);
free(f->sub);
if(f->ondisplaylist) {
f->ondisplaylist = 0;
if(f->next)
f->next->prev = f->prev;
else
f->display->lastfont = f->prev;
if(f->prev)
f->prev->next = f->next;
else
f->display->firstfont = f->next;
}
if(f->lodpi != f)
freefont(f->lodpi);
if(f->hidpi != f)
freefont(f->hidpi);
free(f);
}
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