Provided by: libsdl3-doc_3.2.8+ds-1_all 

NAME
SDL_GetSurfaceColorKey - Get the color key (transparent pixel) for a surface.
HEADER FILE
Defined in SDL3/SDL_surface.h
SYNOPSIS
#include "SDL3/SDL.h" bool SDL_GetSurfaceColorKey(SDL_Surface *surface, Uint32 *key);
DESCRIPTION
The color key is a pixel of the format used by the surface, as generated by SDL_MapRGB (). If the surface doesn't have color key enabled this function returns false.
FUNCTION PARAMETERS
surface the SDL_Surface structure to query. key a pointer filled in with the transparent pixel.
RETURN VALUE
Returns true on success or false on failure; call SDL_GetError () for more information.
AVAILABILITY
This function is available since SDL 3.2.0.
SEE ALSO
•(3), SDL_SetSurfaceColorKey(3), •(3), SDL_SurfaceHasColorKey(3) Simple Directmedia Layer SDL 3.2.8 SDL_GetSurfaceColorKey(3)