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| author | Grigori Goronzy <greg@blackbox> | 2011-08-25 03:48:18 +0200 |
|---|---|---|
| committer | Grigori Goronzy <greg@blackbox> | 2011-08-25 04:01:15 +0200 |
| commit | 50d46ca6a281c0f14d75e5428c7ee3d653360fc3 (patch) | |
| tree | 6aa1a2879111e90118c25819d1d7a0e6ff705b47 /.gitignore | |
| parent | 8351e4d6ec08831f2f2470631f0f5e7d9f3394c0 (diff) | |
| download | libass-50d46ca6a281c0f14d75e5428c7ee3d653360fc3.tar.bz2 libass-50d46ca6a281c0f14d75e5428c7ee3d653360fc3.tar.xz | |
vertical: improve glyph positioning
It is a bit crazy, but for vertical layout the sTypoAscender and
sTypoDescender fields of the OS/2 table are supposed to be used for
determining the size of the ideographic EM box [1], so that glyphs
can be centered on the baseline more neatly.
With this change, vertical layout should be completely equal to
VSFilter.
[1] http://www.microsoft.com/typography/otspec150/os2.htm#sta
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