SDL_SurfaceHasColorKey - Man Page

#include <SDL3/SDL_surface.h>

bool SDL_SurfaceHasColorKey(SDL_Surface *surface);

It is safe to pass a NULL surface here; it will return false.

surface

the SDL_Surface structure to query.

Returns true if the surface has a color key, false otherwise.

It is safe to call this function from any thread.

This function is available since SDL 3.2.0.

SDL_SetSurfaceColorKey(3), SDL_GetSurfaceColorKey(3)

SDL_GetSurfaceColorKey(3), SDL_SetSurfaceColorKey(3).