NAME¶

SDL_UpdateWindowSurfaceRects - Copy areas of the window surface to the screen.

SYNOPSIS¶

#include "SDL3/SDL.h"

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

DESCRIPTION¶

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 ().

Note that this function will update _at least_ the rectangles specified, but this is only intended as an optimization; in practice, this might update more of the screen (or all of the screen!), depending on what method SDL uses to send pixels to the system.

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.

AVAILABILITY¶

This function is available since SDL 3.0.0.

SEE ALSO¶

SDL_GetWindowSurface(3), SDL_UpdateWindowSurface(3)