[Bug 487581] New: Liberation Mono: incorrect spacing for Combining Diacritical Marks.

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Summary: Liberation Mono: incorrect spacing for Combining Diacritical Marks.

https://bugzilla.redhat.com/show_bug.cgi?id=487581

           Summary: Liberation Mono: incorrect spacing for Combining
                    Diacritical Marks.
           Product: Fedora
           Version: rawhide
          Platform: All
        OS/Version: Linux
            Status: NEW
          Severity: medium
          Priority: low
         Component: liberation-fonts
        AssignedTo: cchance(a)redhat.com
        ReportedBy: adam.buchbinder(a)gmail.com
         QAContact: extras-qa(a)fedoraproject.org
                CC: cchance(a)redhat.com, fedora-fonts-bugs-list(a)redhat.com,
                    fedora-i18n-bugs(a)redhat.com
    Classification: Fedora


User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.6)
Gecko/2009020911 Ubuntu/8.10 (intrepid) Firefox/3.0.6

According to the bug on freedesktop.org (link below), Liberation Mono has an
incorrect spacing definition for "Combining Diacritical Marks"; they should
have zero space, and should render above the last letter, not the next one.

Paste following text with selected font:

Correct: accent above o
Incorrect: accent above g


Reproducible: Always

Steps to Reproduce:
1. Enter a string with a combining diacritic mark in Liberation Mono, e.g.,
"o̍g". Don't use gnome-terminal; it relies on vte, which doesn't
handle
combining characters. Use something like gedit; switching fonts will reveal the
issue as the diacritical mark switches places.
Actual Results:  
The diacritic appears one letter to the right of where it should be.

Expected Results:  
The diacritic should appear in the proper place.

I'm using ttf-liberation 1.04.93-1 on Ubuntu Intrepid; I'm filing this as an
upstream bug. If this should be filed elsewhere, please let me know.

I'm filing this because several monospace fonts have incorrect spacing for
"Combining Diacritical Marks":

http://bugs.freedesktop.org/show_bug.cgi?id=20330

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[Bug 487581] Liberation Mono: incorrect spacing for Combining Diacritical Marks.

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--- Comment #1 from Adam Buchbinder <adam.buchbinder(a)gmail.com&gt;  2009-02-26 15:19:23
EDT ---
Created an attachment (id=333380)
 --> (https://bugzilla.redhat.com/attachment.cgi?id=333380)
Video of the issue being triggered.

This video shows the diacritic changing position when the selected font is
changed. Note that the diacritic moves to the right when Liberation Mono is
selected.

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[Bug 487581] Liberation Mono: incorrect spacing for Combining Diacritical Marks.

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Caius 'kaio' Chance <cchance(a)redhat.com&gt; changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |CLOSED
         Resolution|                            |WONTFIX




--- Comment #3 from Caius 'kaio' Chance <cchance(a)redhat.com&gt;  2009-06-30
23:00:20 EDT ---
Zap this bug. Please reopen if bug persists after testing on latest version.

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[Bug 487581] Liberation Mono: incorrect spacing for Combining Diacritical Marks.

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Adam Buchbinder <adam.buchbinder(a)gmail.com&gt; changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |Reopened
             Status|CLOSED                      |ASSIGNED
         Resolution|WONTFIX                     |




--- Comment #4 from Adam Buchbinder <adam.buchbinder(a)gmail.com&gt;  2009-07-02 22:28:31
EDT ---
I downloaded the source and, I think, got the current (1.05.1.20090630) version
to display in gedit. (I removed ttf-liberation, then placed the compiled fonts
in ~/.fonts and ran "fc-cache ~/.fonts".)

Can I ask why this bug was closed? I wasn't reporting it against a particular
version of Red Hat or Fedora; I don't run a version of Red Hat or Fedora. I was
under the impression that this was the upstream bugtracker for the Liberation
fonts--is there somewhere else I should be submitting this?

I'm setting this to ASSIGNED, because Bugzilla won't let me change it to
anything else other than CLOSED.

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[Bug 487581] Liberation Mono: incorrect spacing for Combining Diacritical Marks.

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--- Comment #5 from Caius 'kaio' Chance <cchance(a)redhat.com&gt;  2009-07-03
01:09:05 EDT ---
I zapped this to draw attention of reporter to test the latest version of l-f
on latest verion of OS.

Which font you selected in gnome-appearance-properties? If you use Mono /
Monospace alias as font, please kindly confirm if liberation-fonts is currently
used prioritized font.

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[Bug 487581] Liberation Mono: incorrect spacing for Combining Diacritical Marks.

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--- Comment #6 from Adam Buchbinder <adam.buchbinder(a)gmail.com&gt;  2009-07-03 10:04:04
EDT ---
As I said, I don't run a Red Hat-based OS, and the latest version packaged for
anything Debian-based is 1.04.93. I performed the same test as the one shown in
the attached video above, switching between the default Monospace font (I think
it's DejaVu Sans Mono, but all I know for sure is that it isn't Liberation
Mono, because the diacritics display properly) and what I'm reasonably sure is
the new version of Liberation Mono.

When I do this, as in the video above, the diacritic hops from the top of the
'o' (where it should be) to the top of the 'g' (where it should not be).

Here's an easier way to reproduce it. Download "og.txt" (which I'll
attach
shortly) and run the following commands (you'll need the pango dev package for
pango-view):

$ pango-view og.txt --font="DejaVu Sans Mono"
[Accent appears over the 'o']

$ pango-view og.txt --font="Liberation Mono"
[Accent appears over the 'g']

Does this make the problem more clear? It should be pretty trivial to
reproduce.

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[Bug 487581] Liberation Mono: incorrect spacing for Combining Diacritical Marks.

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--- Comment #7 from Adam Buchbinder <adam.buchbinder(a)gmail.com&gt;  2009-07-03 10:05:37
EDT ---
Created an attachment (id=350439)
 --> (https://bugzilla.redhat.com/attachment.cgi?id=350439)
Text triggering the issue.

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[Bug 487581] Liberation Mono: incorrect spacing for Combining Diacritical Marks.

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--- Comment #8 from Caius 'kaio' Chance <cchance(a)redhat.com&gt;  2009-07-06
00:49:14 EDT ---
Hi, is "o̍g" the only combination with this problem that spotted by you? I
could see if I could fix, given that it is not hinting problem.

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[Bug 487581] Liberation Mono: incorrect spacing for Combining Diacritical Marks.

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--- Comment #9 from Caius 'kaio' Chance <cchance(a)redhat.com&gt;  2009-07-06
00:54:58 EDT ---
Confirmed problem exists in 1.05.1.20090630

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[Bug 487581] Liberation Mono: incorrect spacing for Combining Diacritical Marks.

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--- Comment #10 from Caius 'kaio' Chance <cchance(a)redhat.com&gt;  2009-07-06
02:27:13 EDT ---
Hi Adam, could you test again with 1.05.1.20090706 please?

https://fedorahosted.org/releases/l/i/liberation-fonts/liberation-fonts-t...

https://fedorahosted.org/releases/l/i/liberation-fonts/liberation-fonts-t...

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[Bug 487581] Liberation Mono: incorrect spacing for Combining Diacritical Marks.

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Caius 'kaio' Chance <cchance(a)redhat.com&gt; changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |i18n
         Depends on|                            |503430




--- Comment #11 from Caius 'kaio' Chance <cchance(a)redhat.com&gt;  2009-07-07
21:08:02 EDT ---
Needs bug #503430 to get precondition correct, with traditional kern table
conserved.

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[Bug 487581] Liberation Mono: incorrect spacing for Combining Diacritical Marks.

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Bug 487581 depends on bug 503430, which changed state.

Bug 503430 Summary: Incorrect Kerning in some applications
https://bugzilla.redhat.com/show_bug.cgi?id=503430

           What    |Old Value                   |New Value
----------------------------------------------------------------------------
             Status|ASSIGNED                    |CLOSED
         Resolution|                            |RAWHIDE



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--- Comment #12 from Adam Buchbinder <adam.buchbinder(a)gmail.com&gt; 2010-03-16 22:57:18
EDT ---
I just retested this on Ubuntu Karmic, which includes ttf-liberation version
1.05.1.20090721-0ubuntu1; the problem is still present, as before. (Apologies
for the delay; it's difficult for me to test new versions of the fonts easily,
as I haven't been able to come up with an easier way of checking.)

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--- Comment #13 from Caius 'kaio' Chance <cchance(a)redhat.com&gt; 2010-03-16
23:26:52 EDT ---
Thanks. I have planned to spend more time on this font set.

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--- Comment #14 from Bug Zapper <fedora-triage-list(a)redhat.com&gt; 2010-04-27 09:03:29
EDT ---

This message is a reminder that Fedora 11 is nearing its end of life.
Approximately 30 (thirty) days from now Fedora will stop maintaining
and issuing updates for Fedora 11.  It is Fedora's policy to close all
bug reports from releases that are no longer maintained.  At that time
this bug will be closed as WONTFIX if it remains open with a Fedora 
'version' of '11'.

Package Maintainer: If you wish for this bug to remain open because you
plan to fix it in a currently maintained version, simply change the 'version' 
to a later Fedora version prior to Fedora 11's end of life.

Bug Reporter: Thank you for reporting this issue and we are sorry that 
we may not be able to fix it before Fedora 11 is end of life.  If you 
would still like to see this bug fixed and are able to reproduce it 
against a later version of Fedora please change the 'version' of this 
bug to the applicable version.  If you are unable to change the version, 
please add a comment here and someone will do it for you.

Although we aim to fix as many bugs as possible during every release's 
lifetime, sometimes those efforts are overtaken by events.  Often a 
more recent Fedora release includes newer upstream software that fixes 
bugs or makes them obsolete.

The process we are following is described here: 
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Caius 'kaio' Chance <cchance(a)redhat.com&gt; changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |CLOSED
         Resolution|                            |NOTABUG

--- Comment #15 from Caius 'kaio' Chance <cchance(a)redhat.com&gt; 2010-05-06
04:39:25 EDT ---
I have checked on Dejavu Mono. To have the font behave like what you said, it
involved 3 chars 'o', 'uni030d', 'g'. Then, it needs 3 GSUB lookup
tables -
'ccmp', 'dlig' and 'mark' - to convert into what you expected.

In fact I have checked version 1.02 which is the initial archive, there had
been no uni030D glyph ever existed. Hence, I would certainly Liberation Fonts
do not support the languages that consist of 'o̍g'.

Yes, you are always welcomed to request for this, but this is not a bug but a
feature request. Thank you very much. Please file a ticket at upstream tracker:

http://code.google.com/p/liberation-fonts/issues/list

I am closing this because this is not a bug.

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--- Comment #16 from Caius 'kaio' Chance <cchance(a)redhat.com&gt; 2010-05-06
21:12:49 EDT ---
Cloned this to http://code.google.com/p/liberation-fonts/issues/detail?id=8 for
tracking.

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Caius 'kaio' Chance <cchance(a)redhat.com&gt; changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|CLOSED                      |ASSIGNED
         Resolution|NOTABUG                     |

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Caius 'kaio' Chance <cchance(a)redhat.com&gt; changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|11                          |rawhide

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Caius Chance <me(a)kaio.net&gt; changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|me(a)kaio.net                 |extras-orphan@fedoraproject
                   |                            |.org

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[Bug 487581] Liberation Mono: incorrect spacing for Combining Diacritical Marks.

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Fedora Admin XMLRPC Client <fedora-admin-xmlrpc(a)redhat.com&gt; changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|extras-orphan@fedoraproject |psatpute(a)redhat.com
                   |.org                        |

--- Comment #17 from Fedora Admin XMLRPC Client <fedora-admin-xmlrpc(a)redhat.com&gt;
2010-07-14 20:22:12 EDT ---
This package has changed ownership in the Fedora Package Database.  Reassigning
to the new owner of this component.

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[Bug 487581] Liberation Mono: incorrect spacing for Combining Diacritical Marks.

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Pravin Satpute <psatpute(a)redhat.com&gt; changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |CLOSED
         Resolution|                            |NOTABUG
        Last Closed|2010-05-06 04:39:25         |2010-10-12 06:47:33

--- Comment #19 from Pravin Satpute <psatpute(a)redhat.com&gt; 2010-10-12 06:47:33 EDT
---
While checking more on this i found there are characters from Range U+0300 to
U+033E need GPOS rules for combining with previous characters.

Liberation is not supporting any of this shape, so this is not a bug.

Please report Request For Enhancements (RFE) if need this support, give
information i.e in which language this thing is required etc

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