A variable controlling the scaling policy for SDL_RenderSetLogicalSize.
Defined in SDL_hints.h
#define SDL_HINT_RENDER_LOGICAL_SIZE_MODE "SDL_RENDER_LOGICAL_SIZE_MODE"
This variable can be set to the following values:
"0" or "letterbox" - Uses letterbox/sidebars to fit the entire rendering on screen "1" or "overscan" - Will zoom the rendering so it fills the entire screen, allowing edges to be drawn offscreen
By default letterbox is used