debian man page for sdl_updaterect

SDL_UpdateRect(3)						 SDL API Reference						 SDL_UpdateRect(3)

NAME
       SDL_UpdateRect - Makes sure the given area is updated on the given screen.

SYNOPSIS
       #include "SDL.h"

       void SDL_UpdateRect(SDL_Surface *screen, Sint32 x, Sint32 y, Sint32 w, Sint32 h);

DESCRIPTION
       Makes  sure  the  given	area  is  updated on the given screen. The rectangle must be confined within the screen boundaries (no clipping is
       done).

       If 'x', 'y', 'w' and 'h' are all 0, SDL_UpdateRect will update the entire screen.

       This function should not be called while 'screen' is locked.

SEE ALSO
       SDL_UpdateRects, SDL_Rect, SDL_Surface, SDL_LockSurface

SDL
							      Tue 11 Sep 2001, 23:01						 SDL_UpdateRect(3)