[cairo] cairo_scale < 0.5 image clarity issue

Antoine Azar cairo at antoineazar.com
Thu Sep 25 10:20:17 PDT 2008

Hi Zaheer,


there has been recent progress on that matter, you should check with Fred
Plourde. I think that two different approaches are being implemented,
mipmapping and box filtering. I would suggest using a summed area table for
box filtering. We'd be doubling the memory requirements of each image using
it but we would take almost no performance hit when doing downscale





From: cairo-bounces at cairographics.org
[mailto:cairo-bounces at cairographics.org] On Behalf Of zaheer ahmad
Sent: Wednesday, September 24, 2008 10:50 AM
To: cairo at cairographics.org
Subject: [cairo] cairo_scale < 0.5 image clarity issue


hi all,
referring to thread at
would like to know if there are any updates in cairo recently that improve
the scale clarity for < 0.5

currently to scale an image at 0.25 i create a temporary buffer and scale it
two times at 0.5 to get a better quality.

appreciate any inputs.


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