[webkit-dev] Subpixel Layout Update

[Levi Weintraub]

On Fri, Feb 10, 2012 at 6:14 PM, Adam Barth <abarth at webkit.org> wrote:

> On Fri, Feb 10, 2012 at 6:09 PM, Levi Weintraub <leviw at google.com> wrote:
> > On Fri, Feb 10, 2012 at 6:03 PM, Adam Barth <abarth at webkit.org> wrote:
> >>
> >> On Fri, Feb 10, 2012 at 5:49 PM, Levi Weintraub <leviw at google.com>
> wrote:
> >> > WebKittens,
> >> >
> >> > We're planning to wrap up our conversion of the RenderTree to subpixel
> >> > units
> >> > next week. We've created a the following wiki page to help explain the
> >> > changes we are making: https://trac.webkit.org/wiki/LayoutUnit If you
> >> > work
> >> > on the rendering code, please take a look and talk to Emil and me if
> you
> >> > have any questions.
> >> >
> >> > This will effect a large number of layout test expectations as well as
> >> > some
> >> > platform interfaces. If you are working on or maintaining a port other
> >> > than
> >> > Apple, Qt, and Chromium, please touch bases with us.
> >>
> >> We've been talking about turning on mock scroll bars for Chromium.
> >> Would it make sense to do that at the same time to minimize the number
> >> of baseline updates?
> >
> > It would allow us to make only one WebKit sheriff's life miserable
> instead
> > of two, but the changes don't really relate in any other meaningful way.
>
> I meant it would let us update the PNGs once instead of twice.
>
> Of course. We're only looking at something on the order of 500-600 layout
test expectation updates, which I believe is quite a bit smaller than the
mock scrollbar update, but we're totally interested in saving this effort.
Who should we talk to about aligning these changes?


> Adam
>
>
> >> > On Fri, Oct 28, 2011 at 1:43 PM, Levi Weintraub <leviw at chromium.org>
> >> > wrote:
> >> >>
> >> >> WebKittens,
> >> >>
> >> >> As you may know, Emil and I have been diligently working on getting
> >> >> subpixel layout up and running in WebKit. After much testing, we
> >> >> settled on a fixed point implementation instead of floats; we're
> happy
> >> >> to discuss how we arrived at this decision. We're currently in a
> state
> >> >> where we pass most of the layout tests and many (but not all) of the
> >> >> remaining failures are due to rounding differences that are
> desirable.
> >> >>
> >> >> As such, we've moved our efforts to a public branch on the WebKit.org
> >> >> svn server, and would love early feedback and advice. Our branch
> >> >> currently runs the following ports: Mac, Qt, Chromium-Linux, and
> >> >> Chromium-Mac. Any advice or help bringing up other platforms would be
> >> >> greatly appreciated.
> >> >>
> >> >> You can check our work out here:
> >> >> http://svn.webkit.org/repository/webkit/branches/subpixellayout
> >> >> (currently branched from r98654 and we'll continue to track head by a
> >> >> day or two)
> >> >>
> >> >> Thanks,
> >> >> Emil and Levi
> >> >
> >> >
> >> >
> >> > _______________________________________________
> >> > webkit-dev mailing list
> >> > webkit-dev at lists.webkit.org
> >> > http://lists.webkit.org/mailman/listinfo.cgi/webkit-dev
> >> >
> >
> >
>
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