About shaders with the current renderer

[Bowarc]

I belive that ggez shaders are per-canvas things so im gona base my idea of that fact.

What if, to keep current idea of layers but add shaders to specific render request bits we keep a mut ref of the current canvas, draw everything on it from far to near to preserve layers and when you hit a drawparam with a shader different than the one on the current canvas, you .finish current canvas and make the current canvas a new one with the given spcific shader.

[Bowarc]

To make it even more optimised we could group render request bits per shaders in the same layer

[Bowarc]

But what to do with shaders that require other canvases, like shadows?

[Bowarc]

The layered renderer is a good idea but

Ggez already does a lot of work similar to that (which isn't rly usable sadly), so maybe rewrite using a lower level rendrer.

The idea is good tho