a #GInputStream from which to load the pixbuf
the width the image should have or -1 to not constrain the width
the height the image should have or -1 to not constrain the height
%TRUE to preserve the image's aspect ratio
optional #GCancellable object, %NULL to ignore
a #GAsyncReadyCallback to call when the pixbuf is loaded
the data to pass to the callback function
2.24
Creates a new pixbuf by asynchronously loading an image from an input stream.
For more details see gdk_pixbuf_new_from_stream_at_scale(), 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 gdk_pixbuf_new_from_stream_finish() to get the result of the operation.