Use Color::is_straight(). Also, re-enable the optimization for straight blending...

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

diff --git a/synfig-core/trunk/src/synfig/context.cpp b/synfig-core/trunk/src/synfig/context.cpp
index 024b6d8..d16c06b 100644 (file)
--- a/synfig-core/trunk/src/synfig/context.cpp
+++ b/synfig-core/trunk/src/synfig/context.cpp
@@ -202,7 +202,7 @@ Context::accelerated_render(Surface *surface,int quality, const RendDesc &rendde
                if(layer_bounds.area() <= 0.0000000000001 || !(layer_bounds && bbox))
                {
                        if (composite &&
-                               composite->get_blend_method() == Color::BLEND_STRAIGHT &&
+                               Color::is_straight(composite->get_blend_method()) &&
                                composite->get_amount() != 0.0f)
                        {
                                straight_and_empty = true;
@@ -211,10 +211,13 @@ Context::accelerated_render(Surface *surface,int quality, const RendDesc &rendde
                        continue;
                }
 
-               // If this layer has Straight as the blend method and amount is 1.0
-               // then we don't want to render the context
-               if (composite && composite->get_blend_method() == Color::BLEND_STRAIGHT &&
-                       composite->get_amount() == 1.0f)
+               // If this layer has Straight as the blend method and amount
+               // is 1.0, and the layer doesn't depend on its context, then
+               // we don't want to render the context
+               if (composite &&
+                       Color::is_straight(composite->get_blend_method()) &&
+                       composite->get_amount() == 1.0f &&
+                       !composite->reads_context())
                {
                        Layer::Handle layer = *context;
                        while (!context->empty()) context++; // skip the context