X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=synfig-core%2Ftrunk%2Fsrc%2Fsynfig%2Fcolor.cpp;h=1dcc314ebe049fe06add9eb84d6d7b953e96fc55;hb=9459638ad6797b8139f1e9f0715c96076dbf0890;hp=1fa133c0742de9954f296b3227e2733177bd5b40;hpb=7c5adc60527fbc236a500ca73723d158e459f1a9;p=synfig.git

diff --git a/synfig-core/trunk/src/synfig/color.cpp b/synfig-core/trunk/src/synfig/color.cpp
index 1fa133c..1dcc314 100644
--- a/synfig-core/trunk/src/synfig/color.cpp
+++ b/synfig-core/trunk/src/synfig/color.cpp
@@ -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
@@ -444,7 +444,9 @@ blendfunc_BEHIND(Color &a,Color &b,float amount)
 static Color
 blendfunc_ALPHA_BRIGHTEN(Color &a,Color &b,float amount)
 {
-	if(a.get_a()<b.get_a()*amount)
+	// \todo can this be right, multiplying amount by *b*'s alpha?
+	// compare with blendfunc_BRIGHTEN where it is multiplied by *a*'s
+	if(a.get_a() < b.get_a()*amount)
 		return a.set_a(a.get_a()*amount);
 	return b;
 }
@@ -452,7 +454,7 @@ blendfunc_ALPHA_BRIGHTEN(Color &a,Color &b,float amount)
 static Color
 blendfunc_ALPHA_DARKEN(Color &a,Color &b,float amount)
 {
-	if(a.get_a()*amount>b.get_a())
+	if(a.get_a()*amount > b.get_a())
 		return a.set_a(a.get_a()*amount);
 	return b;
 }
@@ -569,27 +571,27 @@ Color::blend(Color a, Color b,float amount, Color::BlendMethod type)
 
 	const static blendfunc vtable[BLEND_END]=
 	{
-		blendfunc_COMPOSITE,
+		blendfunc_COMPOSITE,	// 0
 		blendfunc_STRAIGHT,
 		blendfunc_BRIGHTEN,
 		blendfunc_DARKEN,
 		blendfunc_ADD,
-		blendfunc_SUBTRACT,
+		blendfunc_SUBTRACT,		// 5
 		blendfunc_MULTIPLY,
 		blendfunc_DIVIDE,
 		blendfunc_COLOR,
 		blendfunc_HUE,
-		blendfunc_SATURATION,
+		blendfunc_SATURATION,	// 10
 		blendfunc_LUMINANCE,
 		blendfunc_BEHIND,
 		blendfunc_ONTO,
 		blendfunc_ALPHA_BRIGHTEN,
-		blendfunc_ALPHA_DARKEN,
+		blendfunc_ALPHA_DARKEN,	// 15
 		blendfunc_SCREEN,
 		blendfunc_HARD_LIGHT,
 		blendfunc_DIFFERENCE,
 		blendfunc_ALPHA_OVER,
-		blendfunc_OVERLAY,
+		blendfunc_OVERLAY,		// 20
 		blendfunc_STRAIGHT_ONTO,
 	};