From a6143438ab9d8283e3e6d6782edbe33cdd52525d Mon Sep 17 00:00:00 2001
From: Oliver Vogel <oliver@olivervogel.net>
Date: Sun, 27 Jan 2013 12:40:45 +0100
Subject: [PATCH] added greyscale method

---
 src/Intervention/Image/Image.php | 10 ++++++++++
 tests/ImageTest.php              |  8 +++++++-
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/src/Intervention/Image/Image.php b/src/Intervention/Image/Image.php
index 738c1bee..cac4af0f 100644
--- a/src/Intervention/Image/Image.php
+++ b/src/Intervention/Image/Image.php
@@ -197,6 +197,16 @@ class Image
         imagefilter($this->resource, IMG_FILTER_PIXELATE, $size, $advanced);
     }
 
+    public function grayscale()
+    {
+        imagefilter($this->resource, IMG_FILTER_GRAYSCALE);
+    }
+
+    public function greyscale()
+    {
+        $this->grayscale();
+    }
+
     public function reset()
     {   
         $this->setProperties($this->dirname .'/'. $this->basename);
diff --git a/tests/ImageTest.php b/tests/ImageTest.php
index 6b5c89e8..9790f89d 100644
--- a/tests/ImageTest.php
+++ b/tests/ImageTest.php
@@ -105,7 +105,13 @@ class ImageTest extends PHPUnit_Framework_Testcase
     {
         $img = $this->getTestImage();
         $img->pixelate(20);
-        $img->save('public/pixels.jpg');
+        $this->assertInstanceOf('Intervention\Image\Image', $img);
+    }
+
+    public function testGreyscaleImage()
+    {
+        $img = $this->getTestImage();
+        $img->greyscale();
         $this->assertInstanceOf('Intervention\Image\Image', $img);
     }