[FEATURE] Filter for making a round image.

[chrootlogin]

Adds a new filter that creates a same sized empty copy of the image with transparent background. With the radius you set it calculates if a pixel is in- or outside the circle, if it's inside then it copies it to the new picture.

[stof]

Please use null, not false

This method does not accept a boolean (true is not a valid value), it only need to have a case for not provided integer, and the right way to specify the absence of value is null, not false

[romainneutron]

Hello, thanks for your contribution ! Could you have a look at comments and add unit tests ?

[chrootlogin]

Hey guys
Thank you for your answers! I will try to fix this in a few days.

[Richtermeister]

I would love to have a circular filter. I just wonder how this "copy pixels" approach stacks up against the approach of creating a circular mask and using it to mask the original image, in particular with regards to being able to anti-alias the edge of the circle.

Just curious, I haven't tried either approach myself yet.

[mlocati]

I agree with @Richtermeister and @stof. Furthermore, we already have the great applyMask that works great, and it's much more flexible: you can use it to make an image round (or elliptical, or whatever). That's why I'm closing this.