[webkit-dev] Please don't land patches without rebaselining tests for at least one platform

Ryosuke Niwa rniwa at webkit.org
Thu Mar 21 18:30:00 PDT 2013

On Thu, Mar 21, 2013 at 6:05 PM, Maciej Stachowiak <mjs at apple.com> wrote:

> On Mar 21, 2013, at 5:38 PM, Glenn Adams <glenn at skynav.com> wrote:
>  On Thu, Mar 21, 2013 at 6:11 PM, Ryosuke Niwa <rniwa at webkit.org> wrote:
>> On Thu, Mar 21, 2013 at 5:10 PM, Glenn Adams <glenn at skynav.com> wrote:
>>> On Thu, Mar 21, 2013 at 5:55 PM, Ryosuke Niwa <rniwa at webkit.org> wrote:
>>>> On Thu, Mar 21, 2013 at 4:50 PM, Glenn Adams <glenn at skynav.com> wrote:
>>>>> That's my platform, so I have to manage with it.
>>>> I do have a Retina MBP too but I don't use it to work on the rendering
>>>> engine precisely because of this issue.  It's expected that every
>>>> contributor has access to a machine where he/she can run layout tests.
>>>>  Retina MBP is not such a machine.
>>> Well, it's been working for me.
>> The fact you appears to be contributing patches without appropriate
>> rebaselines seems to indicate that it's not working for us.
> Oh, please point out a case of "without appropriate rebaseline". Please
> point out in the documentation where "appropriate rebaseline" is defined. I
> think you are making unwarranted assumptions here. If you can't define or
> understand a process where I can contribute using a MBP Retina, then I
> think you are imposing an arbitrary, unwarranted restriction on the
> community. I have been contributing successfully, ergo, it is working.
> Many are contributing WebCore layout and rendering patches using a wide
> variety of platforms, not all of which match your platform assumptions. It
> is not reasonable to claim they aren't contributing positively or that
> their contributions don't work.
> We should definitely make it possible to contribute using a Retina system.
> Apple's flagship laptops offer Retina displays, and it would be crazy to
> rule them out as development machines. I'd imagine one day we may want the
> canonical Mac pixel results to be *only* retina.

Yes, we should but it isn't today.

Perhaps one possibility is to make it possible to generate non-Retina pixel
> results on a Retina system. That seems eminently doable to me, unless
> there's something I am missing.

Yeah, Alexey and I were talking about this earlier. We need a some way to
force CAGraphics, etc… to behave as if we're in non-Retina MBP. We
definitely don't want to check in Retina pixel results.

- R. Niwa
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