xref: /inferno-os/libdraw/subfontcache.c (revision 37da2899f40661e3e9631e497da8dc59b971cbd0)
1 #include "lib9.h"
2 #include "draw.h"
3 
4 /*
5  * Easy versions of the cache routines; may be substituted by fancier ones for other purposes
6  */
7 
8 static char	*lastname;
9 Subfont	*lastsubfont;
10 
11 Subfont*
lookupsubfont(Display * d,char * name)12 lookupsubfont(Display *d, char *name)
13 {
14 	if(strcmp(name, "*default*") == 0)
15 		return d->defaultsubfont;
16 	if(lastname && strcmp(name, lastname)==0 && d==lastsubfont->bits->display){
17 		lastsubfont->ref++;
18 		return lastsubfont;
19 	}
20 	return 0;
21 }
22 
23 void
installsubfont(char * name,Subfont * subfont)24 installsubfont(char *name, Subfont *subfont)
25 {
26 	free(lastname);
27 	lastname = strdup(name);
28 	lastsubfont = subfont;	/* notice we don't free the old one; that's your business */
29 }
30 
31 void
uninstallsubfont(Subfont * subfont)32 uninstallsubfont(Subfont *subfont)
33 {
34 	if(subfont == lastsubfont){
35 		lastname = 0;
36 		lastsubfont = 0;
37 	}
38 }
39