Use a mutex to prevent the two render threads (rendering the workarea and the navigat...

[synfig.git] / synfig-core / trunk / src / synfig / layer_duplicate.cpp

diff --git a/synfig-core/trunk/src/synfig/layer_duplicate.cpp b/synfig-core/trunk/src/synfig/layer_duplicate.cpp
index 6577237..32b9baa 100644 (file)
--- a/synfig-core/trunk/src/synfig/layer_duplicate.cpp
+++ b/synfig-core/trunk/src/synfig/layer_duplicate.cpp
@@ -173,6 +173,7 @@ Layer_Duplicate::accelerated_render(Context context,Surface *surface,int quality
        Color::BlendMethod blend_method(get_blend_method());
        int steps = duplicate_param->count_steps(time_cur);
 
+       Mutex::Lock lock(mutex);
        duplicate_param->reset_index(time_cur);
        do
        {