1 files changed, 46 insertions, 0 deletions
diff --git a/demos/gtk-demo/mask.c b/demos/gtk-demo/mask.c
new file mode 100644
index 0000000000..4266b44b52
--- /dev/null
+++ b/demos/gtk-demo/mask.c
@@ -0,0 +1,46 @@
+/* Masking
+ *
+ * Demonstrates mask nodes.
+ *
+ * This demo uses a text node as mask for
+ * an animated linear gradient.
+ */
+
+#include <gtk/gtk.h>
+#include "demo4widget.h"
+
+
+GtkWidget *
+do_mask (GtkWidget *do_widget)
+{
+  static GtkWidget *window = NULL;
+
+  if (!window)
+    {
+      GtkWidget *box;
+      GtkWidget *widget;
+
+      window = gtk_window_new ();
+      gtk_window_set_title (GTK_WINDOW (window), "Mask Nodes");
+      gtk_window_set_default_size (GTK_WINDOW (window), 600, 400);
+      gtk_window_set_display (GTK_WINDOW (window),
+                              gtk_widget_get_display (do_widget));
+      g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
+
+      box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
+      gtk_window_set_child (GTK_WINDOW (window), box);
+
+      widget = demo4_widget_new ();
+      gtk_widget_set_hexpand (widget, TRUE);
+      gtk_widget_set_vexpand (widget, TRUE);
+
+      gtk_box_append (GTK_BOX (box), widget);
+    }
+
+  if (!gtk_widget_get_visible (window))
+    gtk_widget_set_visible (window, TRUE);
+  else
+    gtk_window_destroy (GTK_WINDOW (window));
+
+  return window;
+}