Public bug reported:
This is a problem with hinting, so I'm assigning it tentatively to FT,
because I don't really know where the problem lies. As described below
the problem is present on an installed Ubuntu 10.04, as well as
completely pristine 11.04 run from a USB stick.
Description:
Font hinting fails completely for U+00E3 LATIN SMALL LETTER A WITH TILDE (ã).
For instance in the "Ubuntu" font at 18pt size it's rendered indistinguishable
from a macron, whereas at 19pt it's very clearly a tilde. The problem is not
limited to a single font, or a single size, or only for small enough sizes.
Another font exhibiting the same problem is Trebuchet MS -- the tilde looks
perfect at 32pt, but at 33pt it's almost a straight line with barely visible
trace of waves. Same for lower sizes: below 14pt it's rendered as a macron, 15
and 16 have it look right, then macron up until 23pt, then 24pt is great again
but 25pt is a macron, etc.
The same problem is not present for U+0303 COMBINING TILDE. A combined
with it (ã) is rendered properly and visibly at all point sizes down to
8pt. At 7pt it does look like a straight line, but it's hard to judge
because the font is so tiny.
The attached .gif is a small animation clearly showing the issue.
** Affects: freetype (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/839189
Title:
font hinting produces nonsensical results for tilde-a
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