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Re: [ft-devel] [PATCH] CJK Autohinter should not clump stems together wh
From: |
Werner LEMBERG |
Subject: |
Re: [ft-devel] [PATCH] CJK Autohinter should not clump stems together when there are too many of them |
Date: |
Sun, 20 Feb 2011 07:43:54 +0100 (CET) |
> Some Chinese characters, such as 量 and 置, have a large number of
> horizontal stems. At ordinary sizes, the autohinter will often
> clump adjacent stems together; although the result remains readable,
> the unevenness of black and white looks rather ugly.
>
> afcjk.patch is my patch that attempts to solve this problem. All
> stems that are pixel-aligned have at least one pixel of space (or
> other stems) in between. Other stems are not aligned, but only have
> their position interpolated, so they have the un-hinted look which
> is IMHO better.
Thanks for your patch; it looks reasonable. Toshiya-san, could you
please comment?
Right now I'm in the process of improving the documentation of the
auto-hinter (mainly to get really acquainted with the code), trying to
fix reported issues later on, including the infinality stuff.
> orig.png and new.png compares the rendered result without and with
> this patch, for WenQuanYi MicroHei at 15px with slight autohinting.
> I think new.png looks noticeably better than orig.png, and better
> than no hinting as well. That font is now quite comfortable to read
> down to about 12px.
If you say so I must believe you :-) My Chinese is too rudimentary to
fluently read large passages of 漢字, so I can't really comment on the
legibility.
Werner