Hello. I'm trying to use cairo to generate a png image.

But after running this program,
http://paste.factorcode.org/paste?id=945, all I get is blank 300x300
png image. Anyone who has experience with cairo can give me a hint?
Also, how do I display an <image-surface> on the screen ?
The cairo-gadgets/cairo-demos/cairo-samples code is on unmantained, so
I have nothing to get started beyong cairo-tests.factor.

TIA,
Hugo

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