Shape of negative space?

[Alex Shroyer]

Is there a way to make a cutout or negative space shape? Like in Google+ my picture is cropped in the shape of a circle. Pretty sure that's some sort of CSS trick with the radius property of a div, but in Elm my thoughts tend much more high-level and I went looking for some way to specify whether a shape adds to or subtracts from an image.

[Jeff Smits]

Not that I know of. Would be neat, but I'm not sure canvas and svg support that kind of operation.

On 18 Aug 2014 01:57, "Alex Shroyer" <ashr...@gmail.com> wrote:

Is there a way to make a cutout or negative space shape? Like in Google+ my picture is cropped in the shape of a circle. Pretty sure that's some sort of CSS trick with the radius property of a div, but in Elm my thoughts tend much more high-level and I went looking for some way to specify whether a shape adds to or subtracts from an image.

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[Do Bi]

I think it would be cool to be able to combine an image and a grayscale transparency mask. Feature request? :D

[Dobes Vandermeer]

You can do it in canvas, although it kind of only works for cropping, not so much for an arbitrary alpha channel:

https://developer.mozilla.org/samples/canvas-tutorial/6_1_canvas_composite.html

Sometimes just stamping a bit of a frame/shadow on top of the image after the composition operation will give the desired effect.