SDL Wiki
(This is the legacy documentation for stable SDL2, the current stable version; SDL3 is the current development version.)


Copy areas of the window surface to the screen.


int SDL_UpdateWindowSurfaceRects(SDL_Window * window,
                                 const SDL_Rect * rects,
                                 int numrects);

Function Parameters

window the window to update
rects an array of SDL_Rect structures representing areas of the surface to copy, in pixels
numrects the number of rectangles

Return Value

Returns 0 on success or a negative error code on failure; call SDL_GetError() for more information.


This is the function you use to reflect changes to portions of the surface on the screen.

This function is equivalent to the SDL 1.2 API SDL_UpdateRects().


This function is available since SDL 2.0.0.


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