Initial revision

src/libdraw/subfontcache.c

@@ -0,0 +1,39 @@
+#include <u.h>
+#include <libc.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(strcmp(name, "*default*") == 0)
+		return d->defaultsubfont;
+	if(lastname && strcmp(name, lastname)==0 && 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;
+	}
+}