# SDL_SavePNG_IO Save a surface to a seekable SDL data stream in PNG format. ## Header File Defined in [](https://github.com/libsdl-org/SDL/blob/main/include/SDL3/SDL_surface.h) ## Syntax ```c bool SDL_SavePNG_IO(SDL_Surface *surface, SDL_IOStream *dst, bool closeio); ``` ## Function Parameters | | | | | ------------------------------ | ----------- | ---------------------------------------------------------------------------------------------------- | | [SDL_Surface](SDL_Surface) * | **surface** | the [SDL_Surface](SDL_Surface) structure containing the image to be saved. | | [SDL_IOStream](SDL_IOStream) * | **dst** | a data stream to save to. | | bool | **closeio** | if true, calls [SDL_CloseIO](SDL_CloseIO)() on `dst` before returning, even in the case of an error. | ## Return Value (bool) Returns true on success or false on failure; call [SDL_GetError](SDL_GetError)() for more information. ## Thread Safety This function is not thread safe. ## Version This function is available since SDL 3.4.0. ## See Also - [SDL_LoadPNG_IO](SDL_LoadPNG_IO) - [SDL_SavePNG](SDL_SavePNG) ---- [CategoryAPI](CategoryAPI), [CategoryAPIFunction](CategoryAPIFunction), [CategorySurface](CategorySurface)