Pixbuf.saveToStreamvAsync

void saveToStreamvAsync(gio.output_stream.OutputStream stream,  string type,  string[]  optionKeys =  null,  string[]  optionValues =  null,  gio.cancellable.Cancellable cancellable =  null,  gio.types.AsyncReadyCallback callback =  null)

Saves pixbuf to an output stream asynchronously.

For more details see gdkpixbuf.pixbuf.Pixbuf.saveToStreamv, which is the synchronous version of this function.

When the operation is finished, callback will be called in the main thread.

You can then call gdkpixbuf.pixbuf.Pixbuf.saveToStreamFinish to get the result of the operation.

Parameters

`stream`	a gio.output_stream.OutputStream to which to save the pixbuf
`type`	name of file format
`optionKeys`	name of options to set
`optionValues`	values for named options
`cancellable`	optional gio.cancellable.Cancellable object, `NULL` to ignore
`callback`	a gio.types.AsyncReadyCallback to call when the pixbuf is saved