On Mon, 26 Apr 2021 20:31:38 +0200, Thomas Wolff > > Am 26.04.2021 um 01:14 schrieb Lemures Lemniscati via Cygwin: > > On Sun, 25 Apr 2021 22:33:57 +0200, Thomas Wolff > >> Am 25.04.2021 um 15:41 schrieb Lemures Lemniscati via Cygwin: > >>> Hi! > >>> > >>> mintty overstrokes some fonts unexpectedly. > >>> https://gitlab.com/test.cases/mintty-test/-/tree/54ae800e695ecd1741851cab57320a9d0e95a6fd > >>> > >>> I got a result mintty-sample-msgothic.png. > >>> https://gitlab.com/test.cases/mintty-test/-/blob/54ae800e695ecd1741851cab57320a9d0e95a6fd/mintty-sample-msgothic.png > >>> > >>> In the 4th line of the output, fonts (of u+25cb) were overstruck > >>> unexpectedly. > >>> 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. > > Thank you, Thomas. > > > > I tried some earlier versions of mintty: > > > > * mintty-3.1.0-1 has the same issue > > * mintty-2.9.6-0 works expectedly in this case. > My previous comment was wrong, sorry. The cause of the issue is that the > Windows CJK fonts are designed for CJK ambiguous-wide layout. If you run > mintty with option Charwidth=ambig-wide, or better in an ambiguous-wide > locale like LC_CTYPE=C.utf8@cjkwide, width handling and font rendering will > match. > Mintty applies auto-narrowing to some characters that would render far out of > their character cell, squeezing them into the cell, in order to optimise the > trade-off between readability and authentic rendering. > Some character ranges were taken out of that mechanism in 2.9.7, including > the Geometric Shapes which you've encountered, in this case because they are > "geometric" and the assumption was that they should not be tampered for > rendering.
Thank you, Thomas! I overlooked 'man mintty'. It works expectedly under the setting. I'd be happy if the option Charwidth is accessible from GUI. Regards, Lem -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation: https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
