Mxlaxe

Same problem for me, if I enter the acf custom field slug in the “fieds” argument of the shortcode, nothing shows on the form, only the Submit button.
How to have the ACF custom fileds filtering to work ?

Hey,

I came across the same issue, went through all the threads I could find but I finally managed after a few research of my own to find the solution to the transparent PNG backgrounds that go black.

Here is how:

Open the ‘image-watermark.php’ file from the plugin folder and go to line 1275 (version 1.3.3 of the plugin), or find the function named ‘private function get_image_resource($filepath, $mime_type)’

Then, just add this : imagesavealpha($res, true);
After the line : $res = imagecreatefrompng($filepath);

I also noticed something weird at the line right after, which was like this:
$transparent = imagecolorallocatealpha($res, 255, 255, 254, 127);

I thought the third ‘254’ should be ‘255’ to match the transparency, so I just changed that line too to this:
$transparent = imagecolorallocatealpha($res, 255, 255, 255, 127);

After these 2 changes, the function should look like this:

private function get_image_resource($filepath, $mime_type)
	{
		switch($mime_type)
		{
			case 'image/jpeg':
			case 'image/pjpeg':
				return imagecreatefromjpeg($filepath);

			case 'image/png':
				$res = imagecreatefrompng($filepath);
                                imagesavealpha($res, true);
				$transparent = imagecolorallocatealpha($res, 255, 255, 255, 127);
				imagefilledrectangle($res, 0, 0, imagesx($res), imagesy($res), $transparent);
				return $res;

			default:
				return FALSE;
		}
	}

Hope this helps! it was such a shame that this beautiful plugin was missing that.
Maybe the author should consider updating so this doesn’t happen anymore 😉

Thanks again for the amazing plugin!