Function sdl2_sys::SDL_ConvertSurface

pub unsafe extern "C" fn SDL_ConvertSurface(
    src: *mut SDL_Surface, 
    fmt: *const SDL_PixelFormat, 
    flags: Uint32
) -> *mut SDL_Surface

Creates a new surface of the specified format, and then copies and maps the given surface to it so the blit of the converted surface will be as fast as possible. If this function fails, it returns NULL.

The \c flags parameter is passed to SDL_CreateRGBSurface() and has those semantics. You can also pass ::SDL_RLEACCEL in the flags parameter and SDL will try to RLE accelerate colorkey and alpha blits in the resulting surface.