registry team mailing list archive

[Karlt <217908@xxxxxxxxxxxxxxxxxx>]

(In reply to comment #76)
> cairo seems already to do something like it,
> 
> http://mxr.mozilla.org/mozilla-central/source/gfx/cairo/cairo/src/cairo-xlib-display.c#339

Yes, we need to match those buggy_pad_reflect server version tests
exactly.

> ... and fallbacks if the server is buggy, doesn't it?

Right.  But the fallback that cairo needs to do is quite disastrous to
performance.  It will read back the image (and the destination, if there
is an alpha channel in the image) from the server to software scale and
then return to the server.

I assume it's possible to do some fancy FILTER_NEAREST only for the source-image-pixel-width outer border and FILTER_BILINEAR for the interior of the image,
but I'm not sure it's worth it just for older servers.

Simplest is probably to keep the old behavior for older servers, but fix
up things with EXTEND_PAD/FILTER_BILINEAR for newer servers.

-- 
FFe: Pixellated Images in Firefox/Opera due to incorrect EXTEND_PAD implementation in several video drivers
https://bugs.launchpad.net/bugs/217908
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