Check to see if a particular video mode is supported.
SDL_VideoModeOK returns 0 if the requested mode is not supported under any bit depth, or returns the bits-per-pixel of the closest available mode with the given width, height and requested Sdl.SDL_Surface flags. See SDL_SetVideoMode.
The bits-per-pixel value returned is only a suggested mode. You can usually request and bpp you want when setting the video mode and SDL will emulate that color depth with a shadow video surface.
The arguments to SDL_VideoModeOK() are the same ones you would pass to SDL_SetVideoMode
Binds to C-function call in SDL_video.h:
extern DECLSPEC int SDLCALL SDL_VideoModeOK(int width, int height, int bpp, Uint32 flags)