[ Version ( since = "2.4" ) ]
public delegate bool PixbufSaveFunc (uint8 buf) throws Error
Save functions used by [method
This function is called once for each block of bytes that is "written" by `gdk_pixbuf_save_to_callback()`.
If successful it should return `TRUE`; if an error occurs it should set `error` and return `FALSE`, in which case `gdk_pixbuf_save_to_callback()` will fail with the same error.
bytes to be written.
number of bytes in
user data passed to save_to_callback.
A location to return an error.
`TRUE` if successful, `FALSE` otherwise