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