SDL_RotateSurface - Man Page

#include <SDL3/SDL_surface.h>

SDL_Surface * SDL_RotateSurface(SDL_Surface *surface, float angle);

The angle of rotation can be negative for counter-clockwise rotation.

When the rotation isn't a multiple of 90 degrees, the resulting surface is larger than the original, with the background filled in with the colorkey, if available, or RGBA 255/255/255/0 if not.

surface

the surface to rotate.

angle

the rotation angle, in degrees.

Returns a rotated copy of the surface or NULL on failure; call SDL_GetError() for more information.

This function can be called on different threads with different surfaces.

This function is available since SDL 3.4.0.