From 5e078ed4c4d317e60ba6b8479721c9abf4829ad4 Mon Sep 17 00:00:00 2001
From: "David D." <info@collectivesessions.com>
Date: Fri, 1 Mar 2013 16:17:34 -0700
Subject: [PATCH] Update Image.php

---
 src/Intervention/Image/Image.php | 61 ++++++++++++++++++++++++++------
 1 file changed, 50 insertions(+), 11 deletions(-)

diff --git a/src/Intervention/Image/Image.php b/src/Intervention/Image/Image.php
index 3b141a06..563155d4 100644
--- a/src/Intervention/Image/Image.php
+++ b/src/Intervention/Image/Image.php
@@ -314,23 +314,35 @@ class Image
         $height = array_key_exists('height', $dimensions) ? intval($dimensions['height']) : null;
         return $this->resize($width, $height, true);
     }
-    
+
     /**
-     * Crop an image
+     * Crop the current image
+     *
+     * @param  integer $width
+     * @param  integer $height
+     * @param  integer $pos_x
+     * @param  integer $pos_y
      *
-     * @param  integer $src_x
-     * @param  integer $src_y
-     * @param  integer $src_w
-     * @param  integer $src_h
      * @return Image
      */
-    public function crop($src_x , $src_y , $src_w , $src_h)
+    public function crop($width, $height, $pos_x = null, $pos_y = null)
     {
-        if (is_null($src_x) || is_null($src_y) || is_null($src_w) || is_null($src_h)) {
-           throw new Exception('x, y, width and height needs to be defined');
+        $width = is_numeric($width) ? intval($width) : null;
+        $height = is_numeric($height) ? intval($height) : null;
+        $pos_x = is_numeric($pos_x) ? intval($pos_x) : null;
+        $pos_y = is_numeric($pos_y) ? intval($pos_y) : null;
+
+        if (is_null($pos_x) && is_null($pos_y)) {
+            // center position of width/height rectangle
+            $pos_x = floor(($this->width - intval($width)) / 2);
+            $pos_y = floor(($this->height - intval($height)) / 2);
         }
-        $this->modify(0, 0, $src_x , $src_y, $src_w, $src_h, $src_w, $src_h);
-        return $this;
+
+        if (is_null($width) || is_null($height)) {
+            throw new Exception('width and height of cutout needs to be defined');
+        }
+
+        return $this->modify(0, 0, $pos_x , $pos_y, $width, $height, $width, $height);
     }
 
     /**
@@ -410,6 +422,21 @@ class Image
         return $this;
     }
 
+    /**
+     * Rotate image with given angle
+     *
+     * @param  float    $angle
+     * @param  string   $color
+     * @param  int      $ignore_transparent
+     * @return Image
+     */
+    public function rotate($angle = 0, $color = '#000000', $ignore_transparent = 0)
+    {
+        $this->resource = imagerotate($this->resource, $angle, $this->parseColor($color), $ignore_transparent);
+
+        return $this;
+    }
+
     /**
      * Fill image with given hexadecimal color at position x,y
      *
@@ -614,6 +641,18 @@ class Image
         return $this;
     }
 
+    /**
+     * Invert colors of current image
+     * 
+     * @return Image
+     */
+    public function invert()
+    {
+        imagefilter($this->resource, IMG_FILTER_NEGATE);
+
+        return $this;
+    }
+
     /**
      * Reset to original image resource
      *