/**
* Alpha transparency polyfill for PHP's imagecopymerge() function.
*
* @param resource $dst_im Destination GD resource
* @param resource $src_im Source GD resource
* @param integer $dst_x Destination x coordinates.
* @param integer $dst_y Destination y coordinates.
* @param integer $src_x Source x coordinates.
* @param integer $src_y Source y coordinates.
* @param integer $src_w Source width.
* @param integer $src_h Source height.
* @param float $pct Blend value (opacity) [0-100]
* @return boolean True on success, false otherwise
*/
private function imagecopymergealpha($dst_im, $src_im, $dst_x, $dst_y, $src_x, $src_y, $src_w, $src_h, $pct)
{
imagealphablending($dst_im, true);
$opacity = Img::load($src_im)->alpha($pct / 100)->img;
$success = imagecopy($this->img, $opacity, $dst_x, $dst_y, $src_x, $src_y, $src_w, $src_h);
imagealphablending($dst_im, false);
return $success;
}
