[cairo] Question about extents and transformations

[kooda at upyum.com]

Hi.

I’m trying to use the cairo_path_extents procedure to get a rough
bounding box of shapes drawn by cairo, and I found this surprising
behaviour:

The documentation for cairo_path_extents() states: “Computes a bounding
box in user-space coordinates”, that’s why I expect the extents of a
given path to always be the same, whichever transformation might be
applied.

It appears to be the case for scaling and translations, but rotation gives
me different extents. Am I missing something or is this a bug?

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