Provided by: libsdl3-image-doc_3.2.4+ds-1_all 

NAME
IMG_SavePNG_IO - Save an SDL_Surface into PNG image data, via an SDL_IOStream.
HEADER FILE
Defined in SDL3_image/SDL_image.h
SYNOPSIS
#include "SDL3_image/SDL_image.h" bool IMG_SavePNG_IO(SDL_Surface *surface, SDL_IOStream *dst, bool closeio);
DESCRIPTION
If you just want to save to a filename, you can use IMG_SavePNG () instead. If closeio is true, dst will be closed before returning, whether this function succeeds or not.
FUNCTION PARAMETERS
surface the SDL surface to save. dst the SDL_IOStream to save the image data to. closeio true to close/free the SDL_IOStream before returning, false to leave it open.
RETURN VALUE
Returns true on success or false on failure; call SDL_GetError() for more information.
AVAILABILITY
This function is available since SDL_image 3.0.0.
SEE ALSO
•(3), IMG_SavePNG(3) SDL_image SDL_image 3.2.4 IMG_SavePNG_IO(3)