Function sdl2_sys::SDL_RenderReadPixels

pub unsafe extern "C" fn SDL_RenderReadPixels(
    renderer: *mut SDL_Renderer, 
    rect: *const SDL_Rect, 
    format: Uint32, 
    pixels: *mut c_void, 
    pitch: c_int
) -> c_int

\brief Read pixels from the current rendering target.

\param renderer The renderer from which pixels should be read. \param rect A pointer to the rectangle to read, or NULL for the entire render target. \param format The desired format of the pixel data, or 0 to use the format of the rendering target \param pixels A pointer to be filled in with the pixel data \param pitch The pitch of the pixels parameter.

\return 0 on success, or -1 if pixel reading is not supported.

\warning This is a very slow operation, and should not be used frequently.