A variable controlling whether to enable Direct3D 11+'s Debug Layer.
Defined in SDL_hints.h
#define SDL_HINT_RENDER_DIRECT3D11_DEBUG "SDL_RENDER_DIRECT3D11_DEBUG"
This variable does not have any effect on the Direct3D 9 based renderer.
This variable can be set to the following values:
By default, SDL does not use Direct3D Debug Layer.