How to change Renderer target?

[dpc]

Is it possible to change current rendering target of a given Renderer?

Also when doing:

let prescaled_surface_ref = prescaled.surface().unwrap();
let prescaled_texture = screen.create_texture_from_surface(prescaled_surface_ref).unwrap();

where prescaled is a Renderer https://docs.rs/sdl2/0.24.0/sdl2/render/struct.Renderer.html

I get:

src/main.rs:47:36: 47:63 error: the trait bound `sdl2::surface::SurfaceRef: std::convert::AsRef<sdl2::surface::SurfaceRef>` is not satisfied 

I'm puzzled if what I'm trying to do is allowed or not. (I've switched to Renderer::into_surface, but I don't want to recreate the Renderer if I don't have to).

[dpc]

The later part is fixed in #547

[Cobrand]

Currently is is pretty non-Rust-y but a Renderer has an inner target called RendererTarget that you can change without having to create another Renderer.

See here.

Basically you have to query the RenderTarget from your Renderer, and then "set" the target of your RendererTarget, do your stuff, and then switch back to the initial RenderTarget (I assume your window) with reset.

Also note that switching RenderTarget is pretty slow compared to other methods (few µs instead of ns), so you should avoid doing it every single frame.

[Cobrand]

PR 639 closed this, we changed how to change a target globally and added examples on that side as well.