From 725f4a07f3fb04518646f792b64d3c7fa120091a Mon Sep 17 00:00:00 2001
From: Emmanuele Bassi <ebassi@linux.intel.com>
Date: Wed, 13 Jun 2012 10:23:28 +0100
Subject: [PATCH] canvas: Propagate Cairo errors when diagnostic mode is
 enabled

It can be a useful debugging tool to report the eventual error state of
the cairo_t after the ::draw signal emission ended.
---
 clutter/clutter-canvas.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/clutter/clutter-canvas.c b/clutter/clutter-canvas.c
index 6bbbde485..43c0e7524 100644
--- a/clutter/clutter-canvas.c
+++ b/clutter/clutter-canvas.c
@@ -402,6 +402,15 @@ clutter_canvas_emit_draw (ClutterCanvas *self)
                  cr, priv->width, priv->height,
                  &res);
 
+#ifdef CLUTTER_ENABLE_DEBUG
+  if (_clutter_diagnostic_enabled () && cairo_status (cr))
+    {
+      g_warning ("Drawing failed for <ClutterCanvas>[%p]: %s",
+                 self,
+                 cairo_status_to_string (cairo_status (cr)));
+    }
+#endif
+
   self->priv->cr = NULL;
   cairo_destroy (cr);