Draw to a RenderTarget to zoom and scroll

[rtrussell]

@Relyai

E.g. scene (sprites/multiple textures) is drawn to a 1280x720 render target and then scaled up to game’s selected resolution of 1920x1080.

If I’m understanding correctly, it’s straightforward. Render the scene to a 1280x720 target texture, then SDL_RenderCopy() that texture to the 1920x1080 screen, which will scale it. It’s the same approach as discussed here except that the target texture and the backbuffer are different sizes.