mintty overstrokes some fonts unexpectedly
Sun Apr 25 20:33:57 GMT 2021
Am 25.04.2021 um 15:41 schrieb Lemures Lemniscati via Cygwin:
> mintty overstrokes some fonts unexpectedly.
> How to reproduce
> Setting mintty to use msgothic.ttc in 20pt, run a
> following command.
> perl -e '
> binmode STDOUT, ":utf8";
> print <<END;
> I got a result mintty-sample-msgothic.png.
> In the 4th line of the output, fonts (of u+25cb) were overstruck
> And there are other characters also, which are similarly overstruck.
This is a Windows bug. Mintty clearly instruct Windows to apply
equidistant spacing to achieve fixed-width character cell behaviour. But
for certain character ranges, Windows ignores that. Another example for
such misbehaviour is the Tibetan block (U+0F00-U+0FFF). Mintty could
work around that by rendering characters separately, at a significant
penalty for output speed however. Or it could do that only for affected
ranges, but criteria to identify them are obscure.
More information about the Cygwin