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

SDL_UpdateWindowSurfaceRects

Copy areas of the window surface to the screen.

Syntax

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
numrects	the number of rectangles

Return Value

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

Remarks

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().

Version

This function is available since SDL 2.0.0.

Related Functions

• SDL_GetWindowSurface
• SDL_UpdateWindowSurface

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CategoryAPI

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