throw NotReadableException if try read partially saved image

(getimagesize returns correct size, but image infact is not readable)

src/Intervention/Image/Gd/Decoder.php

@@ -25,18 +25,15 @@ class Decoder extends \Intervention\Image\AbstractDecoder
         // define core
         switch ($info[2]) {
             case IMAGETYPE_PNG:
-                $core = imagecreatefrompng($path);
+                $core = @imagecreatefrompng($path);
-                $this->gdResourceToTruecolor($core);
                 break;
 
             case IMAGETYPE_JPEG:
-                $core = imagecreatefromjpeg($path);
+                $core = @imagecreatefromjpeg($path);
-                $this->gdResourceToTruecolor($core);
                 break;
 
             case IMAGETYPE_GIF:
-                $core = imagecreatefromgif($path);
+                $core = @imagecreatefromgif($path);
-                $this->gdResourceToTruecolor($core);
                 break;
 
             default:
@@ -45,6 +42,14 @@ class Decoder extends \Intervention\Image\AbstractDecoder
                 );
         }
 
+        if ($core === false) {
+            throw new \Intervention\Image\Exception\NotReadableException(
+                "Unable to read image from file ({$path})."
+            );
+        }
+
+        $this->gdResourceToTruecolor($core);
+
         // build image
         $image = $this->initFromGdResource($core);
         $image->mime = $info['mime'];

tests/GdSystemTest.php

@@ -20,6 +20,14 @@ class GdSystemTest extends PHPUnit_Framework_TestCase
         $this->assertEquals('image/png', $img->mime);
     }
 
+    /**
+     * @expectedException \Intervention\Image\Exception\NotReadableException
+     */
+    public function testMakeFromPathBroken()
+    {
+        $this->manager()->make('tests/images/broken.png');
+    }
+
     public function testMakeFromString()
     {
         $str = file_get_contents('tests/images/circle.png');