[OpenJDK 2D-Dev] Font Metrics in OpenJDK vs Sun JDK
Phil.Race at Sun.COM
Thu Jun 12 07:19:06 PDT 2008
The -1 for leading is probably a bug somewhere. Maybe you can look into it
The difference in advance may be due to the absence of byte code hinting
in the freetype found by OpenJDK.
Since you have Tahoma I have to assume you are running on windows and
built your own freetype,
rather than using the one on the O/S. If you build freetype with hinting
for testing purposes then
the difference may be much less.
Ben Loud wrote:
> 2D Folk,
> Since working with OpenJDK, I've notice that text just doesnt look
> right. I made a simple comparison between Sun's JDK6 and OpenJDK see:
> http://benloud.com/fonts.png You can see there are clearly significant
> differences in the horizontal character spacing, particularly
> noticable in "Beagle" and "Spirit", and also the heights are
> different. I also compared the font metrics of a string:
> For Tahoma, plain, 11pt, "The Quick Brown Fox Jumped Over The Lazy Dog."
> AWT FontMetrics:
> Ascent Descent Leading Height String Width
> Sun JDK: 11 3 0 14 241
> OpenJDK: 11 3 -1 13 265
> Ascent Descent Leading Advance Bounds
> Sun JDK: 11.005371 2.2719727 0.0 240.0
> OpenJDK: 11.0 3.0 -1.0 264.0
> Again you can see there are significant differences, particularly in
> the advances and bounds, and the -1 for leading is a bit odd.
> Will it be possible to get metrics that are consistent with Suns JDK?
> Because right now, Swing apps on OpenJDK look quite wrong to me.
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