Create a Framebuffer in Piston

[jabdoa2]

Is there a sane way to render to a framebuffer/FBO in piston? Most of my 2D graphics never change and I would like to render them only once and then reuse the FBO until they change. Is that possible? I found this old SO response which explains how to do it using raw unsafe OpenGL commands. I tried the gfx_core example but it no longer works for me. Is this supported at all? Or is this intentionally unsupported?

[bvssvni]

@jabdoa2 Currently, there is no way to do this except to use the underlying graphics API.

[jabdoa2]

Should I use the gl calls directly or is there something I should try from gfx/gfx_core. Are PRs for this wanted in piston or should I create a separate crate for this? To me this seems to be something which exists in most game framework.

As a background: We are coming from a python framework which supports this. Currently, I'm not able to match the performance of kivy on embedded systems with my piston PoC which should be much faster in general. Piston actually is faster as long as there are few elements on screen but with a lot of elements interpreted python with FBOs wins because it simply does less work.

[bvssvni]

@jabdoa2 PRs are welcome! I agree this should be better. I'm open to suggestions.