libdraw: add scalesize

R=rsc http://codereview.appspot.com/6855092
2012-11-25 22:15:57 -05:00 · 2012-11-25 22:15:57 -05:00 · 9f3851871e
commit 9f3851871e
parent 323e7d0193
3 changed files with 24 additions and 0 deletions
--- a/src/libdraw/init.c
+++ b/src/libdraw/init.c
@ -428,3 +428,10 @@ bufimage(Display *d, int n)
 	return p;
 }

+int
+scalesize(Display *d, int n)
+{
+	if(d == nil || d->dpi <= DefaultDPI)
+		return n;
+	return (n*d->dpi+DefaultDPI/2)/DefaultDPI;
+}