###### (This is the legacy documentation for SDL2, the previous stable version; [SDL3](https://wiki.libsdl.org/SDL3/) is the current stable version.)
# SDL_HasColorKey

Returns whether the surface has a color key

## Header File

Defined in [SDL_surface.h](https://github.com/libsdl-org/SDL/blob/SDL2/include/SDL_surface.h)

## Syntax

```c
SDL_bool SDL_HasColorKey(SDL_Surface * surface);
```

## Function Parameters

|                              |             |                                                    |
| ---------------------------- | ----------- | -------------------------------------------------- |
| [SDL_Surface](SDL_Surface) * | **surface** | the [SDL_Surface](SDL_Surface) structure to query. |

## Return Value

([SDL_bool](SDL_bool)) Return [SDL_TRUE](SDL_TRUE) if the surface has a
color key, [SDL_FALSE](SDL_FALSE) otherwise.

## Remarks

It is safe to pass a NULL `surface` here; it will return
[SDL_FALSE](SDL_FALSE).

## Version

This function is available since SDL 2.0.9.

## See Also

- [SDL_SetColorKey](SDL_SetColorKey)
- [SDL_GetColorKey](SDL_GetColorKey)

----
[CategoryAPI](CategoryAPI), [CategoryAPIFunction](CategoryAPIFunction), [CategorySurface](CategorySurface)