From eb7890cfe8ef5f564e594e79709e9174acf2afb0 Mon Sep 17 00:00:00 2001
From: Artem Pavlenko <artem@mapnik.org>
Date: Wed, 31 Aug 2005 19:36:08 +0000
Subject: [PATCH] added alpha() method

---
 include/color.hpp | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/include/color.hpp b/include/color.hpp
index 35a60fb7b..fc74b9bcb 100644
--- a/include/color.hpp
+++ b/include/color.hpp
@@ -31,9 +31,9 @@ namespace mapnik {
 	Color()
 	    :rgba_(0xffffffff) {}
 
-	Color(int red,int green,int blue)
-	    : rgba_(0xff<<24 | (blue&0xff) << 16 | (green&0xff) << 8 | red&0xff) {}
-
+	Color(int red,int green,int blue,int alpha=0xff)
+	    : rgba_((alpha&0xff) << 24 | (blue&0xff) << 16 | (green&0xff) << 8 | red&0xff) {}
+	
 	explicit Color(int rgba)
 	    : rgba_(rgba) {}
 
@@ -58,6 +58,12 @@ namespace mapnik {
 	{
 	    return rgba_&0xff;
 	}
+
+	inline int alpha() const
+	{
+	    return (rgba_>>24)&0xff;
+	}
+	
 	inline int rgba() const
 	{
 	    return rgba_;