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Re: fontconfig dpi issue

From: Federico Bruni
Subject: Re: fontconfig dpi issue
Date: Thu, 11 May 2017 09:48:22 +0200

Eventually I've added an issue to the tracker:

Il giorno gio 23 feb 2017 alle 7:11, Werner LEMBERG <address@hidden> ha scritto:

 I hope that some font guru (Werner?) can step in and give some

I've seen this a few days ago but no time to reply, sorry.

 I ran into an issue with font rendering in Lilypond where text
 characters are far too large. This issue also affected several
 other users and is described here
 <https://bbs.archlinux.org/viewtopic.php?id=211350>.  It turns out
 that if the dpi setting is manually set in the fontconfig
 fonts.conf file, Lilypond will adopt that dpi setting (rather than
 the standard setting used in Lilypond, which is 1200) and render
 all text too large.

 Before I create an issue on the tracker, some developer should say
 if LilyPond or LXQT must be fixed.  I have no idea about it.

I think it's a lilypond bug, since setting a DPI value is for stuff
that goes to the screen and/or a selected printer, but lilypond should
produce stuff that does not depend on the DPI.

 I also have a proposed patch that fixes the problem described,
 although I don't know if this is the proper way to fix it: [...]

Me neither, unfortunately, since I have never worked with Pango.
However, your patch looks reasonable.

 I also created a minimal Pango example that reproduces the bug here

Have you already reported the problem to the fontconfig people?  Maybe
they can give more advice.


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