Provided by: libsdl3-doc_3.2.20+ds-2_all 

NAME
SDL_FlipSurface - Flip a surface vertically or horizontally.
SYNOPSIS
#include <SDL3/SDL_surface.h>
bool SDL_FlipSurface(SDL_Surface *surface, SDL_FlipMode flip);
FUNCTION PARAMETERS
surface
the surface to flip.
flip the direction to flip.
RETURN VALUE
for more information.
THREAD SAFETY
This function is not thread safe.
AVAILABILITY
This function is available since SDL 3.2.0.
Simple Directmedia Layer SDL 3.2.20 SDL_FlipSurface(3)