fontsrv: scaled pjw

R=rsc
https://codereview.appspot.com/6854130

src/cmd/fontsrv/showpjw.c

@@ -0,0 +1,38 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include <event.h>
+
+void eresized(int);
+
+void
+main(void)
+{
+	initdraw(nil, nil, nil);
+
+	einit(Emouse);
+	eresized(0);
+	for(;;)
+		emouse();
+}
+
+void
+eresized(int new)
+{
+	Point p;
+	int i;
+	char buf[100];
+
+	if(new && getwindow(display, Refnone) < 0)
+		sysfatal("getwindow: %r");
+
+	p = addpt(screen->r.min, Pt(10, 10));
+	draw(screen, screen->r, display->white, nil, ZP);
+	for(i=10; i<=50; i+=i/10) {
+		sprint(buf, "/mnt/font/LucidaGrande/%da/font", i);
+		font = openfont(display, buf);
+		string(screen, p, display->black, ZP, font, "Unknown char: \xe1\x88\xb4");
+		p.y += stringsize(font, "Unknown char: \xe1\x88\xb4").y;
+	}
+	flushimage(display, 1);
+}