[Libreoffice-bugs] [Bug 55469] math fonts have wrong line spacing (in Windows, Linux fixed)

[bugzilla-daemon]

https://bugs.documentfoundation.org/show_bug.cgi?id=55469

Khaled Hosny  changed:

   What|Removed |Added

 CC||hamlet...@gmail.com

--- Comment #35 from Khaled Hosny  ---
*** Bug 103730 has been marked as a duplicate of this bug. ***

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[Libreoffice-bugs] [Bug 55469] math fonts have wrong line spacing (in Windows, Linux fixed)

[bugzilla-daemon]

https://bugs.documentfoundation.org/show_bug.cgi?id=55469

Timur  changed:

   What|Removed |Added

Version|3.6.2.1 rc  |Inherited From OOo
Summary|math fonts have wrong line  |math fonts have wrong line
   |spacing |spacing (in Windows, Linux
   ||fixed)

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[Libreoffice-bugs] [Bug 55469] math fonts have wrong line spacing

[bugzilla-daemon]

https://bugs.documentfoundation.org/show_bug.cgi?id=55469

Khaled Hosny  changed:

   What|Removed |Added

 CC||gti...@gmail.com

--- Comment #34 from Khaled Hosny  ---
*** Bug 90554 has been marked as a duplicate of this bug. ***

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[Libreoffice-bugs] [Bug 55469] math fonts have wrong line spacing

[bugzilla-daemon]

https://bugs.documentfoundation.org/show_bug.cgi?id=55469

Khaled Hosny khaledho...@eglug.org changed:

   What|Removed |Added

  Component|Formula Editor  |graphics stack
   Assignee|khaledho...@eglug.org   |libreoffice-b...@lists.free
   ||desktop.org

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[Libreoffice-bugs] [Bug 55469] math fonts have wrong line spacing

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=55469

Khaled Hosny khaledho...@eglug.org changed:

   What|Removed |Added

 Status|NEW |RESOLVED
 Whiteboard||target:4.1.0
 Resolution|--- |FIXED
   Assignee|libreoffice-b...@lists.free |khaledho...@eglug.org
   |desktop.org |

--- Comment #15 from Khaled Hosny khaledho...@eglug.org ---
Should be fixed in master (note that STIX Math still has excessive interline
space, but that is what the font is telling us to use).

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[Libreoffice-bugs] [Bug 55469] math fonts have wrong line spacing

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=55469

--- Comment #13 from Yury yury.tarasiev...@gmail.com ---
Thank you very much, Khaled! This works!

May I congratulate you on your fine work on XITS and Neo Euler, too. :)

I wouldn't close the issue as FIXED yet. Why such a major issue wasn't
mentioned at least in a launching script?

And could you give #56076 a look, please? That's sort of a last major
showstopper with regard to the font handling in LibO.

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[Libreoffice-bugs] [Bug 55469] math fonts have wrong line spacing

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=55469

--- Comment #14 from Khaled Hosny khaledho...@eglug.org ---
(In reply to comment #13) 
 I wouldn't close the issue as FIXED yet. Why such a major issue wasn't
 mentioned at least in a launching script?

I’ve no idea, I provided a fix that was enabled unconditionally, then it was
disabled unless that environment variable is set.

 And could you give #56076 a look, please? That's sort of a last major
 showstopper with regard to the font handling in LibO.

Sorry, but I’m not really that familiar with LibreOffice internals, the code is
complex and convoluted, it is a traumatizing experience overall so I try not do
do it again :)

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[Libreoffice-bugs] [Bug 55469] math fonts have wrong line spacing

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=55469

Khaled Hosny khaledho...@eglug.org changed:

   What|Removed |Added

 CC||khaledho...@eglug.org

--- Comment #12 from Khaled Hosny khaledho...@eglug.org ---
The problem is that those fonts have very large WinAscent/WinDescent value in
the OS/2 table (otherwise large math glyphs will be clipped on Windows).
LibreOffice, erroneously, uses WinAscent/WinDescent to calculate line height
instead of the, appropriate, TypoAscender/TypoDescender values in the same
table.

This have been fixed a while ago, but it was later disabled by default for
reasons I don’t remember, you have to set SAL_USE_NEW_LINEHEIGHT env variable
to enabled the new and correct behaviour.

IMO, this should be enabled unconditionally as it affects many other fonts not
only math ones.

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[Libreoffice-bugs] [Bug 55469] math fonts have wrong line spacing

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=55469

--- Comment #11 from Yury yury.tarasiev...@gmail.com ---
I believe the problem stems from the following:

1) math fonts always include some of the tall mathematical operators glyphs,
like U+2211 summation or U+222b integral, arcs' glyphs from Misc. technicals
block at U+2300 etc.; 

2) and such glyphs, not only being tall (I believe I've seen sizes of those
doubling the usual (header) em size of the font) as like as not are
positioned under the baseline, either completely or partly; e.g., integral
might span smth. like [+1000..-300] or [+2000..-2000] etc.

3) and such info is summarized in fontconfig cache, I guess;

4) LIBO, if built with fontconfig support, looks into these cache files and
this is where things go wrong - instead of proceeding with the info from font
header (em size and baseline), which also is available there, I believe, LIBO
takes on the extremum dimensions of the font. (And other offices don't!)

I would greatly appreciate somebody looking into this ASAP, as this is quite a
pain. None of the specialised math fonts are usable, how's that for the leading
OSS productivity suite?!

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[Libreoffice-bugs] [Bug 55469] math fonts have wrong line spacing

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=55469

--- Comment #1 from Yury yury.tarasiev...@gmail.com ---
Created attachment 67882
  -- https://bugs.freedesktop.org/attachment.cgi?id=67882action=edit
file with two math fonts, saved in TextMaker 2012

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[Libreoffice-bugs] [Bug 55469] math fonts have wrong line spacing

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=55469

--- Comment #2 from Yury yury.tarasiev...@gmail.com ---
Created attachment 67883
  -- https://bugs.freedesktop.org/attachment.cgi?id=67883action=edit
file with four fonts, saved in LibreOffice 3.6.2.1

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[Libreoffice-bugs] [Bug 55469] math fonts have wrong line spacing

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=55469

--- Comment #3 from Yury yury.tarasiev...@gmail.com ---
Created attachment 67884
  -- https://bugs.freedesktop.org/attachment.cgi?id=67884action=edit
2fonts_kword

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[Libreoffice-bugs] [Bug 55469] math fonts have wrong line spacing

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=55469

--- Comment #4 from Yury yury.tarasiev...@gmail.com ---
Created attachment 67885
  -- https://bugs.freedesktop.org/attachment.cgi?id=67885action=edit
2fonts_libo

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[Libreoffice-bugs] [Bug 55469] math fonts have wrong line spacing

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=55469

--- Comment #5 from Yury yury.tarasiev...@gmail.com ---
Created attachment 67886
  -- https://bugs.freedesktop.org/attachment.cgi?id=67886action=edit
2fonts_tm2008

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[Libreoffice-bugs] [Bug 55469] math fonts have wrong line spacing

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=55469

--- Comment #6 from Yury yury.tarasiev...@gmail.com ---
Created attachment 67887
  -- https://bugs.freedesktop.org/attachment.cgi?id=67887action=edit
2fonts_tm2012

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[Libreoffice-bugs] [Bug 55469] math fonts have wrong line spacing

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=55469

--- Comment #7 from Yury yury.tarasiev...@gmail.com ---
Created attachment 67888
  -- https://bugs.freedesktop.org/attachment.cgi?id=67888action=edit
4fonts_kword

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[Libreoffice-bugs] [Bug 55469] math fonts have wrong line spacing

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=55469

--- Comment #8 from Yury yury.tarasiev...@gmail.com ---
Created attachment 67889
  -- https://bugs.freedesktop.org/attachment.cgi?id=67889action=edit
4fonts_libo

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[Libreoffice-bugs] [Bug 55469] math fonts have wrong line spacing

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=55469

--- Comment #9 from Yury yury.tarasiev...@gmail.com ---
Created attachment 67890
  -- https://bugs.freedesktop.org/attachment.cgi?id=67890action=edit
4fonts_tm2008

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[Libreoffice-bugs] [Bug 55469] math fonts have wrong line spacing

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https://bugs.freedesktop.org/show_bug.cgi?id=55469

--- Comment #10 from Yury yury.tarasiev...@gmail.com ---
Created attachment 67891
  -- https://bugs.freedesktop.org/attachment.cgi?id=67891action=edit
4fonts_tm2012

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[Libreoffice-bugs] [Bug 55469] math fonts have wrong line spacing

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https://bugs.freedesktop.org/show_bug.cgi?id=55469

Yury yury.tarasiev...@gmail.com changed:

   What|Removed |Added

  Attachment #67884|text/plain  |image/jpeg
  mime type||

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