Added copyright lines for files I've edited this year.

[synfig.git] / synfig-core / trunk / src / synfig / color.h

diff --git a/synfig-core/trunk/src/synfig/color.h b/synfig-core/trunk/src/synfig/color.h
index 7c8a356..d54b0e9 100644 (file)
--- a/synfig-core/trunk/src/synfig/color.h
+++ b/synfig-core/trunk/src/synfig/color.h
@@ -6,7 +6,7 @@
 **
 **     \legal
 **     Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
-**     Copyright (c) 2007 Chris Moore
+**     Copyright (c) 2007, 2008 Chris Moore
 **
 **     This package is free software; you can redistribute it and/or
 **     modify it under the terms of the GNU General Public License as
@@ -524,6 +524,15 @@ public:
                        || x==BLEND_HARD_LIGHT
                ;
        }
+
+       //! a blending method is considered 'straight' if transparent pixels in the upper layer can affect the result of the blend
+       static bool is_straight(BlendMethod x)
+       {
+               return x==BLEND_STRAIGHT
+                       || x==BLEND_STRAIGHT_ONTO
+                       || x==BLEND_ALPHA_BRIGHTEN
+               ;
+       }
 /*protected:
 
        value_type& operator[](const int i)