From: Michael J. Rubinsky <mrubinsk@horde.org>
Date: Thu, 8 Jul 2010 14:02:39 +0000 (-0400)
Subject: 2 more utility functions to Horde_Image
X-Git-Url: https://git.internetallee.de/?a=commitdiff_plain;h=38b46ab20d10e662615512767a59765d788a4a1b;p=horde.git

2 more utility functions to Horde_Image
---

diff --git a/framework/Image/lib/Horde/Image.php b/framework/Image/lib/Horde/Image.php
index e1097ece8..0f825652e 100644
--- a/framework/Image/lib/Horde/Image.php
+++ b/framework/Image/lib/Horde/Image.php
@@ -91,6 +91,23 @@ class Horde_Image
     }
 
     /**
+     * @TODO
+     */
+    static public function grayscaleValue($r, $g, $b)
+    {
+        return round(($r * 0.30) + ($g * 0.59) + ($b * 0.11));
+    }
+
+    /**
+     * @TODO
+     */
+    static public function grayscalePixel($originalPixel)
+    {
+        $gray = Horde_Image::grayscaleValue($originalPixel['red'], $originalPixel['green'], $originalPixel['blue']);
+        return array('red'=>$gray, 'green'=>$gray, 'blue'=>$gray);
+    }
+
+    /**
      * Normalizes an HTML color.
      *
      * @param string $color  An HTML color, e.g.: #ffffcc or #ffc.