1 files changed, 78 insertions, 0 deletions
diff --git a/app/Core/Tool.php b/app/Core/Tool.php
index 7939a80e..887c8fb3 100644
--- a/app/Core/Tool.php
+++ b/app/Core/Tool.php
@@ -72,4 +72,82 @@ class Tool
             }
         }
     }
+
+    /**
+     * Generate a jpeg thumbnail from an image
+     *
+     * @static
+     * @access public
+     * @param  string    $src_file         Source file image
+     * @param  string    $dst_file         Destination file image
+     * @param  integer   $resize_width     Desired image width
+     * @param  integer   $resize_height    Desired image height
+     */
+    public static function generateThumbnail($src_file, $dst_file, $resize_width = 250, $resize_height = 100)
+    {
+        $metadata = getimagesize($src_file);
+        $src_width = $metadata[0];
+        $src_height = $metadata[1];
+        $dst_y = 0;
+        $dst_x = 0;
+
+        if (empty($metadata['mime'])) {
+            return;
+        }
+
+        if ($resize_width == 0 && $resize_height == 0) {
+            $resize_width = 100;
+            $resize_height = 100;
+        }
+
+        if ($resize_width > 0 && $resize_height == 0) {
+            $dst_width = $resize_width;
+            $dst_height = floor($src_height * ($resize_width / $src_width));
+            $dst_image = imagecreatetruecolor($dst_width, $dst_height);
+        }
+        elseif ($resize_width == 0 && $resize_height > 0) {
+            $dst_width = floor($src_width * ($resize_height / $src_height));
+            $dst_height = $resize_height;
+            $dst_image = imagecreatetruecolor($dst_width, $dst_height);
+        }
+        else {
+
+            $src_ratio = $src_width / $src_height;
+            $resize_ratio = $resize_width / $resize_height;
+
+            if ($src_ratio <= $resize_ratio) {
+                $dst_width = $resize_width;
+                $dst_height = floor($src_height * ($resize_width / $src_width));
+
+                $dst_y = ($dst_height - $resize_height) / 2 * (-1);
+            }
+            else {
+                $dst_width = floor($src_width * ($resize_height / $src_height));
+                $dst_height = $resize_height;
+
+                $dst_x = ($dst_width - $resize_width) / 2 * (-1);
+            }
+
+            $dst_image = imagecreatetruecolor($resize_width, $resize_height);
+        }
+
+        switch ($metadata['mime']) {
+            case 'image/jpeg':
+            case 'image/jpg':
+                $src_image = imagecreatefromjpeg($src_file);
+                break;
+            case 'image/png':
+                $src_image = imagecreatefrompng($src_file);
+                break;
+            case 'image/gif':
+                $src_image = imagecreatefromgif($src_file);
+                break;
+            default:
+                return;
+        }
+
+        imagecopyresampled($dst_image, $src_image, $dst_x, $dst_y, 0, 0, $dst_width, $dst_height, $src_width, $src_height);
+        imagejpeg($dst_image, $dst_file);
+        imagedestroy($dst_image);
+    }
 }