CairoRescaleBox should support CAIRO_FORMAT_A8 surfaces
Submitted by Carlos Campos
Assigned to poppler-bugs
It would allow us rescaling masks too, so that we can get rid of drawImageMaskPrescaled() which is buggy, and we could use the rescaler in drawSoftMaskedImage() too.
GNOME Bug https://bugzilla.gnome.org/show_bug.cgi?id=614840 contains a document produced with Scribus that uses drawSoftMaskedImage().