imagesx

<?php     public function execute($image)

    {

        $this->setOutput(new Size(

            imagesx($image->getCore()),

            imagesy($image->getCore())

        ));

<?php     public function gdResourceToTruecolor(&$resource)

    {

        $width = imagesx($resource);

        $height = imagesy($resource);

<?php     public function cloneCore($core)

    {

        $width = imagesx($core);

        $height = imagesy($core);

        $clone = imagecreatetruecolor($width, $height);

        imagealphablending($clone, false);