Watermark-Filter does not support transparency?

[Stuffy]

When using the watermark-filter, the watermark appears with a black background on the filtered image.
These are the filter settings im using:

liip_imagine:
    driver: gd
    resolvers:
       default:
          web_path: 
            web_root: ~

    loaders:
        default:
            filesystem:
                data_root: ~

    filter_sets:
        watermark_image:
            filters:
                watermark:
                    image: ../data/watermark_safe.png
                    # size of the water mark relative to the input image
                    size: 1
                    # set the position of the watermark
                    position: center

Am I doing something wrong?

[jehaby]

I think I had the same problem with "GD" and pngs. Solved by switching to driver: imagick :)

[robfrawley]

@Stuffy Did the suggestion by @jehaby resolve your problem? (If so, we should open an issue specifically about GD and transparency problems).

[Stuffy]

Unfortunately, we do not have the imagick-php lib available on our webserver.
I did some reading on GD and the transparency problem, and GD has indeed some issues with transparencies. But there seem to be fixes or workarounds as described here: http://stackoverflow.com/questions/11680734/php-watermark-png-transparency-alpha . It is to note that I tried a 8-Bit png and a 24-bit png, and both did not work.

[peter-gribanov]

Is there a solution without going to a Imagick?
I ran into a similar problem.

Origin image

After resize

[franmomu]

I've been trying to replicate this here: https://github.com/franmomu/liip-imagine-bundle-examples, with this configuration it works. But I don't know if it's the same thing.