[Gimp-user] bounds of selection outside a image

[Tetsuya YUASA <tetsuya ironsand net>]

Hello,

I want to crop several images in same aspect ratio.
So I checked "Fixed" option and set proper values in tool box.

And sometimes I want to complement image with background color if selection
is larger than original size.
I this case, I add a larger layer bottom of the image and crop it.

But it would better if I can do it by one action.
Therefore I'm trying to write a script-fu for it, but I'm stuck now.

Because a function `gimp-selection-bounds` returns points only inside of
the image even if the selection is outside of image.

Is there a way to get bounds of selection outside of a image by using
script-fu?

--
Tetsuya Yuasa