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bug#20628: 25.0.50; Incorrect line height for some fonts

From: Oleh Krehel
Subject: bug#20628: 25.0.50; Incorrect line height for some fonts
Date: Fri, 22 May 2015 22:08:34 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux)

Eli Zaretskii <address@hidden> writes:

>> From: Oleh Krehel <address@hidden>
>> Cc: address@hidden,  address@hidden
>> Date: Fri, 22 May 2015 18:54:17 +0200
>> I attach a patch that sets ascent/descent to 0 specifically for the
>> problematic font family "Latin Modern Math".
> That's hardly TRT.  Even if we'd want to "fix" some fonts, setting
> ascent/descent to zero can only be justified if someone would examine
> all of the characters of that font and verify that none of then needs
> a non-zero value of ascent/descent, or tell us which (smaller) values
> are actually needed.

Actually, I just found out that "Latin Modern Math" is inherently
completely broken. If I set it in gedit, even the ASCII chars have
ridiculous ascent/descent. So "Latin Modern Math" is basically unusable
unless a program specifically modifies ascent/descent, like I did.

The reason gedit was working fine previously is that it never used
"Latin Modern Math", it used some other font.

So it makes sense to "fix" a font that is common and inherently broken.

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