**
** \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
|| 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)