scale adjustment to dpi of screen for qr code

1 files changed, 26 insertions, 7 deletions

diff --git a/src/namestore/gnunet-namestore-gtk.c b/src/namestore/gnunet-namestore-gtk.c
index 9732088a..3f87799a 100644
--- a/src/namestore/gnunet-namestore-gtk.c
+++ b/src/namestore/gnunet-namestore-gtk.c
@@ -613,20 +613,39 @@ setup_qrcode ()
 {
   GdkPixbuf *pb;
   GtkImage *image;
+  GdkScreen *screen; 
+  GtkSettings *settings;
+  gint dpi;
+  int scale;
 
-  pb = create_qrcode (2);
-  if (NULL == pb)
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
-                _("Failed to initialize QR-code pixbuf\n"));
-    return;
-  }
   image = GTK_IMAGE (get_object ("gnunet_namestore_gtk_qr_image"));
   if (NULL == image)
   {
     GNUNET_break (0);
     return;
   }
+  /* adjust scale to screen resolution */
+  screen = gtk_widget_get_screen (GTK_WIDGET (image));
+  settings = gtk_settings_get_for_screen (screen);
+  g_object_get (G_OBJECT (settings),
+                "gtk-xft-dpi",
+                &dpi,
+                NULL);
+  if (-1 == dpi)
+    scale = 2;
+  else if (dpi >= 122800)
+    scale = 4;
+  else if (dpi >= 98304)
+    scale = 3;
+  else
+    scale = 2;
+  pb = create_qrcode (scale);
+  if (NULL == pb)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+                _("Failed to initialize QR-code pixbuf\n"));
+    return;
+  }
   gtk_image_set_from_pixbuf (image, pb);
   g_object_unref (pb);
 }