[gtk+/wip/baedert/gl: 7/39] add tests/showrendernode

[Timm Bäder <baedert src gnome org>]

commit 6c0ffcbea88e7dbb6a50746179c9fef4a78025d5
Author: Timm Bäder <mail baedert org>
Date:   Sat Nov 11 06:41:41 2017 +0100

    add tests/showrendernode
    
    A .node file viewer.

 tests/meson.build      |    3 +-
 tests/showrendernode.c |  125 ++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 127 insertions(+), 1 deletions(-)
---
diff --git a/tests/meson.build b/tests/meson.build
index 3b5bdf5..58dca06 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -127,7 +127,8 @@ gtk_tests = [
   ['testgaction'],
   ['testwidgetfocus'],
   ['testcenterbox'],
-  ['testgridbaseline']
+  ['testgridbaseline'],
+  ['showrendernode'],
 ]
 
 if os_linux
diff --git a/tests/showrendernode.c b/tests/showrendernode.c
new file mode 100644
index 0000000..0db3827
--- /dev/null
+++ b/tests/showrendernode.c
@@ -0,0 +1,125 @@
+#include <gtk/gtk.h>
+
+
+typedef struct _GtkNodeView      GtkNodeView;
+typedef struct _GtkNodeViewClass GtkNodeViewClass;
+
+#define GTK_TYPE_NODE_VIEW           (gtk_node_view_get_type ())
+#define GTK_NODE_VIEW(obj)           (G_TYPE_CHECK_INSTANCE_CAST(obj, GTK_TYPE_NODE_VIEW, GtkNodeView))
+#define GTK_NODE_VIEW_CLASS(cls)     (G_TYPE_CHECK_CLASS_CAST(cls, GTK_TYPE_NODE_VIEW, GtkNodeViewClass))
+struct _GtkNodeView
+{
+  GtkWidget parent_instance;
+
+  GskRenderNode *node;
+};
+
+struct _GtkNodeViewClass
+{
+  GtkWidgetClass parent_class;
+};
+
+GType gtk_node_view_get_type (void) G_GNUC_CONST;
+
+
+G_DEFINE_TYPE(GtkNodeView, gtk_node_view, GTK_TYPE_WIDGET)
+
+static void
+gtk_node_view_snapshot (GtkWidget   *widget,
+                        GtkSnapshot *snapshot)
+{
+  GtkNodeView *self = GTK_NODE_VIEW (widget);
+
+  if (self->node != NULL)
+    {
+      gtk_snapshot_push_clip (snapshot,
+                              &GRAPHENE_RECT_INIT (
+                                0, 0,
+                                gtk_widget_get_width (widget), gtk_widget_get_height (widget)),
+                              "nodeview clip");
+      gtk_snapshot_append_node (snapshot, self->node);
+      gtk_snapshot_pop (snapshot);
+    }
+}
+
+static void
+gtk_node_view_finalize (GObject *object)
+{
+  GtkNodeView *self = GTK_NODE_VIEW (object);
+
+  if (self->node)
+    gsk_render_node_unref (self->node);
+
+  G_OBJECT_CLASS (gtk_node_view_parent_class)->finalize (object);
+}
+
+static void
+gtk_node_view_init (GtkNodeView *self)
+{
+  gtk_widget_set_has_window (GTK_WIDGET (self), FALSE);
+}
+
+static void
+gtk_node_view_class_init (GtkNodeViewClass *klass)
+{
+  GObjectClass   *object_class = G_OBJECT_CLASS (klass);
+  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
+
+  object_class->finalize = gtk_node_view_finalize;
+
+  widget_class->snapshot = gtk_node_view_snapshot;
+}
+
+int
+main (int argc, char **argv)
+{
+  GtkWidget *window;
+  GtkWidget *nodeview;
+  char *contents;
+  gsize len;
+  GError *error = NULL;
+  GBytes *bytes;
+  graphene_rect_t node_bounds;
+
+  if (argc != 2)
+    {
+      printf ("Usage: showrendernode NODEFILE\n");
+      return 0;
+    }
+
+  gtk_init ();
+
+  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+  nodeview = g_object_new (GTK_TYPE_NODE_VIEW, NULL);
+
+  gtk_window_set_decorated (GTK_WINDOW (window), FALSE);
+  gtk_container_add (GTK_CONTAINER (window), nodeview);
+
+  g_file_get_contents (argv[1], &contents, &len, &error);
+  if (error)
+    {
+      g_warning ("%s", error->message);
+      return -1;
+    }
+
+  bytes = g_bytes_new_take (contents, len);
+  GTK_NODE_VIEW (nodeview)->node = gsk_render_node_deserialize (bytes, &error);
+  g_bytes_unref (bytes);
+
+  if (GTK_NODE_VIEW (nodeview)->node == NULL)
+    {
+      g_test_message ("Invalid node file: %s\n", error->message);
+      g_clear_error (&error);
+      g_test_fail ();
+      return -1;
+    }
+
+  gsk_render_node_get_bounds (GTK_NODE_VIEW (nodeview)->node, &node_bounds);
+  gtk_window_resize (GTK_WINDOW (window), node_bounds.size.width, node_bounds.size.height);
+
+  g_signal_connect (window, "delete-event", G_CALLBACK (gtk_main_quit), NULL);
+  gtk_widget_show (window);
+  gtk_main ();
+
+  return 0;
+}