[Poppler-bugs] [Bug 25268] image scaling is ugly / not antialiased in Evince 2.28

Wed Nov 25 09:17:02 PST 2009

http://bugs.freedesktop.org/show_bug.cgi?id=25268

--- Comment #9 from Carlos Garcia Campos <carlosgc at gnome.org>  2009-11-25 09:17:02 PST ---
I guess this is because the filter used by acroread when it doesn't interpolate
is better than the cairo one. These are the possibilities we have with cairo:

CAIRO_FILTER_FAST: this is what we currently use when interpolation flag is not
present.
CAIRO_FILTER_NEAREST: I see mostly the same output than FAST
Any other cairo filter CAIRO_FILTER_GOOD, CAIRO_FILTER_BEST or
CAIRO_FILTER_BILINEAR would affect bug #9860. 

I still think it's a bug in the PDF producer, if you want to make sure images
are rendered high quality, use the Interpolate flag as the PDF spec says. 

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