jehanne/sys/src/lib/draw/subfontcache.c

50 lines
1.1 KiB
C

/*
* This file is part of the UCB release of Plan 9. It is subject to the license
* terms in the LICENSE file found in the top-level directory of this
* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
* part of the UCB release of Plan 9, including this file, may be copied,
* modified, propagated, or distributed except according to the terms contained
* in the LICENSE file.
*/
#include <u.h>
#include <lib9.h>
#include <draw.h>
/*
* Easy versions of the cache routines; may be substituted by fancier ones for other purposes
*/
static char *lastname;
Subfont *lastsubfont;
Subfont*
lookupsubfont(Display *d, char *name)
{
if(d && strcmp(name, "*default*") == 0)
return d->defaultsubfont;
if(lastname && strcmp(name, lastname)==0)
if(d==lastsubfont->bits->display){
lastsubfont->ref++;
return lastsubfont;
}
return 0;
}
void
installsubfont(char *name, Subfont *subfont)
{
free(lastname);
lastname = strdup(name);
lastsubfont = subfont; /* notice we don't free the old one; that's your business */
}
void
uninstallsubfont(Subfont *subfont)
{
if(subfont == lastsubfont){
lastname = 0;
lastsubfont = 0;
}
}