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Re: [ft-devel] Issue with migration from OSX to freetype based rendering

From: Jean-Charles VERDIE
Subject: Re: [ft-devel] Issue with migration from OSX to freetype based rendering...
Date: Fri, 1 Sep 2006 10:43:47 +0200


On 9/1/06, address@hidden <address@hidden > wrote:
Excuse me, I'm confused a bit, please let me get myself together.
I understand as following:
* the reference implementation is WebKit on MacOS X Quartz (only).
* the tested implementation is WebKit on Linux X11.
* the rendering result onto screen by WebKit-on-Linux-X11 is bigger
  than that by WebKit-on-OSX-Quartz.

I apologize for having been unclear, but you got the point. You've summarized the problem we have correctly.

If the issue is more generic (e.g. how about on WebKit-on-Win32,
if there's such?), please let me know.

No clue. It is hard enough to bring webkit on linux, we'll think about others platforms in the future ;)

>We tried to hack FreeType to make the two rendering fit. We changed in
>ftobjs.c the values of 72 dpi and the 64 coefficient in

I have 2 questions:

* this is not WebKit specific? for example, comarison between
  "text shown by at specified pointsize" and
  "text shown by FreeType2 application on X11/Quartz at same pointsize"
  is enough for testing?

Correct. If you port using FreeType instead of Quartz, you'll encounter the same issue.

The 72->64 change was a kind of hack just to try to make the rendered text fit the expected metrics... But there is not solid basement on this figure...


Jean-Charles VerdiƩ
Origyn Web Browser for Embedded Systems Team
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