SetImageResource receives the output from imagecreatetruecolor which can also be false or GdImage

Author: jaapdh

src/PhpPresentation/Shape/Drawing/Gd.php

@@ -83,15 +83,15 @@ public function getImageResource()
     /**
      * Set image resource.
      *
-     * @param resource $value
+     * @param resource|false|\GdImage|null $value
      *
      * @return $this
      */
     public function setImageResource($value = null)
     {
         $this->imageResource = $value;
 
-        if (null !== $this->imageResource) {
+        if (null !== $this->imageResource && false !== $value) {
             // Get width/height
             $this->width = imagesx($this->imageResource);
             $this->height = imagesy($this->imageResource);