[cairo] Question about scale-source-surface-paint test

[Dominic Lachowicz]

Emmanuel,

It might be worth trying the patch in
https://bugs.freedesktop.org/show_bug.cgi?id=2488 as mentioned in this
thread

http://lists.freedesktop.org/archives/cairo/2006-February/006293.html

and let the list know if that improves things.

Best,
Dom

On 2/13/06, Carl Worth <cworth at cworth.org> wrote:
> On Sun, 12 Feb 2006 13:53:14 +0100, Emmanuel Pacaud wrote:
> >
> > Shouldn't edges of image output of this test program be sharp, even
> > without a call to cairo_pattern_set_filter ?
> >
>
> Could be. We have known bugs in the filter sampling location for
> CAIRO_FILTER_NEAREST, (see test/filter-nearest-offset.c). So I
> wouldn't be too surprised to see similar things in the case of
> CAIRO_FILTER_BILINEAR, (which is what you are using).
>
> In the test you refer to I was targeting only the behavior of the
> scaling itself. A separate test that targets the filtering behavior
> might be useful. It will require some careful thinking about how the
> bilinear filter should be specified, (we don't have a written
> specification of that now, nor I am doing that careful thinking at the
> moment).
>
> -Carl
>
>
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>


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