spice-widget: ensure a 640x480 initial size on HiDPI

Signed-off-by: Haochen Tong <i@hexchain.org>
Acked-by: Frediano Ziglio <fziglio@redhat.com>

src/spice-widget.c

@@ -209,19 +209,16 @@ static void update_size_request(SpiceDisplay *display)
     gint reqwidth, reqheight;
     gint scale_factor;
 
+    scale_factor = gtk_widget_get_scale_factor(GTK_WIDGET(display));
+
     if (d->resize_guest_enable || d->allow_scaling) {
-        reqwidth = 640;
-        reqheight = 480;
+        reqwidth = 640 / scale_factor;
+        reqheight = 480 / scale_factor;
     } else {
-        reqwidth = d->area.width;
-        reqheight = d->area.height;
+        reqwidth = d->area.width / scale_factor;
+        reqheight = d->area.height / scale_factor;
     }
 
-    scale_factor = gtk_widget_get_scale_factor(GTK_WIDGET(display));
-
-    reqwidth /= scale_factor;
-    reqheight /= scale_factor;
-
     gtk_widget_set_size_request(GTK_WIDGET(display), reqwidth, reqheight);
     recalc_geometry(GTK_WIDGET(display));
     update_mouse_cursor(display);