[cairo] Gradient rendering seriously broken

[Krzysztof Kosiński]

Hello

My port of Inkscape to Cairo is running into more problems. While the
image resampling problem only decreases quality, there are problems
with gradients that cause completely wrong rendering. The problem is
described in more detail (with images) on the bug tracker:
https://bugs.freedesktop.org/show_bug.cgi?id=29470

Regards, Krzysztof