Avoid rendering using random buffer data when content is locked. In such cases we leave the window area as is.

svn path=/trunk/netsurf/; revision=3912

1 files changed, 7 insertions, 0 deletions

diff --git a/riscos/window.c b/riscos/window.c
index 21e57b9f8..be843b31c 100644
--- a/riscos/window.c
+++ b/riscos/window.c
@@ -1418,6 +1418,13 @@ void ro_gui_window_redraw(wimp_draw *redraw)
 		return;
 	}
 
+	/* We can't render locked content as it is being in the process of
+	   being transformed.  We won't update anything (i.e. leaving
+	   window area as is) instead of showing random data in case of
+	   buffered redraw.  */
+	if (c->locked)
+		return;
+
 	plot = ro_plotters;
 	ro_plot_set_scale(scale);
 	ro_gui_current_redraw_gui = g;