Shape rendering support about coffee

[hecrj]

Yes! This is a planned feature for 0.3.0!

The implementation would likely require a separate render pass, shader set, and a different per-vertex definition with just position and color.

Yes, the idea is to create another pipeline module inside each graphics backend (and probably rename the current one to quad_pipeline or something).

Fill vs Line drawing per shape would need to change the primitive type from lines to triangles and generate slightly different geometry.

Hmm... Interesting. I guess that changing the primitive type mid-batch would need an additional draw call.

It looks like lyon always produces triangles even when tesellating shape strokes. We could always render triangles as a first iteration.

I am currently working on something cool for Coffee, I will open a PR soon... 🤓 After that, I had plans to tackle this. Once we are able to render meshes, then we can try to tackle #17.

PS: I wrote some thoughts about this in #4, but do not worry about duplicated issues. I am totally fine with it, any discussion is welcome. Wherever it is. It does not matter.

[hecrj]

Take a look at #50 and let me know what you think.