From e474041293c79a80ca818338a5dde07e6d1fc898 Mon Sep 17 00:00:00 2001
From: Kore Nordmann <github@kore-nordmann.de>
Date: Tue, 30 May 2006 10:24:32 +0000
Subject: - Implemented circular arcs for gd driver

---
 src/structs/color.php | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

(limited to 'src/structs')

diff --git a/src/structs/color.php b/src/structs/color.php
index c9b1617..c95ce6c 100644
--- a/src/structs/color.php
+++ b/src/structs/color.php
@@ -197,6 +197,24 @@ class ezcGraphColor
             throw new ezcGraphUnknownColorDefinitionException( $color );
         }
     }
+
+    /**
+     * Darkens the color
+     * 
+     * @param float $value Percent to darken the color
+     * @return void
+     */
+    public function darken( $value )
+    {
+        $color = clone $this;
+
+        $value = 1 - $value;
+        $color->red *= $value;
+        $color->green *= $value;
+        $color->blue *= $value;
+
+        return $color;
+    }
 }
 
 ?>
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