[cairo] [PATCH 0/2] Update pixman reference images
chris at chris-wilson.co.uk
Fri Oct 10 00:03:28 PDT 2014
On Thu, Oct 09, 2014 at 06:38:10PM -0700, Bryce Harrington wrote:
> The downscaling tests check all the different filter levels, to three
> different scales. Two of the scales, 96:96 and 96:24, are easy scaling
> settings and thus should produce essentially identical results. The
> third scaling, 96:95, requires blurring the lines bordering solid
> colors, and we generally are fairly permissive as to what the renderer
> decides to do. Unfortunately the various backends seem to vary quite a
> bit in what they choose to do.
> Because of this, I'm tempted to just drop the 96:95 scale test since it
> will always be finicky. However, I do think it's important that we test
> "off" scales like this.
Don't drop it. The image/pixman backend serves as a reference. If the
other backends have equivalent quality but slightly different output,
they define their own reference. If they have unacceptable differences,
mark them as xfail so that we can detect any changes.
Chris Wilson, Intel Open Source Technology Centre
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