Get the D3D9 device associated with a renderer.
IDirect3DDevice9* SDL_RenderGetD3D9Device(SDL_Renderer * renderer);
the renderer from which to get the associated D3D device
Returns the D3D9 device associated with given renderer or NULL if it is not a D3D9 renderer; call SDL_GetError() for more information.
Once you are done using the device, you should release it to avoid a resource leak.
This function is available since SDL 2.0.1.