[webkit-dev] Subpixel Layout Update

[Levi Weintraub]

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.

Thanks!
-Emil and Levi


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
>
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