Feature request: opacity groups

[marceline-cramer]

Hey! I'm looking to use vger in a project of mine but it doesn't support opacity groups (aka layered transparency). What would it take to add opacity groups to vger? I'd be willing to help implement it. :)

[wtholliday]

This is partially implemented. See cur_layer and MAX_LAYERS.

In my C++ version of vger, I only needed a few layers. Do you need more than a few layers?

[marceline-cramer]

My UI system doesn't impose a hard limit on the number of nested opacity layers, but I can't imagine any circumstances where more than four (the value of MAX_LAYERS) would be necessary, so I'll probably set a soft limit anyways. Yeah, that's all I need.

Thank you for the speedy response! :)