[HarfBuzz] Testing out Jonathan's proposal to fix mixed-up Khmer fonts

[Olivier BERTEN]

According to the font documentation:

"Khmer Busra dot
This font does something that a Unicode font should not do and that is it
does not show the ‘correct’ symbol for one particular Unicode codepoint. It
shows a dotted circle in the place where a ក should be shown. It may be
used for didactic purposes. This is to circumvent a particular limitation
of the Microsoft Unicode implementation that does not permit some Khmer
symbols to stand on their own together with another character.
This font is not suited for displaying any Khmer text."

So it's not broken but doesn't infirm the patch ;-)

Olivier


2012/11/21 Mathieu Pellerin <nirvn.asia at gmail.com>

> Jonathan, Behdad,
>
> Just spent the last twenty minutes testing out the proposed patch
> applied to Jonathan's test builds over here
> (
> http://ftp.mozilla.org/pub/mozilla.org/firefox/try-builds/jkew@mozilla.com-4bdec69a038e/
> ).
>
> The results are good:
> - Kh-Battambang works (which was the font that revealed this mess)
> - Hanuman works again
> - Looking at Jonathan's test page, things are looking very good. I can
> only see one broken font, that is Mo5V56do.ttf (which is also broken
> on pango anyways, isn't used online as well as barely so in real
> world, and suspect it might be a font problem)
>
> I've also made a bunch of pango vs harfbuzz (patched) screenshots
> while visiting the top-10 Khmer language web sites. After closely
> inspecting the shots, all things are rendering properly under the
> patched harfbuzz. The rendering is not only regression-free, I've
> actually spotted two places where we are improving from pango's
> misplacements!
>
> Seems like this patch has hit the mythical pot of gold at the end of
> the rainbow ;)
>
> Mathieu
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