[Bug 984230] New: Broken aliasing on small sizes since version 2.00

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=984230

            Bug ID: 984230
           Summary: Broken aliasing on small sizes since version 2.00
           Product: Fedora
           Version: 18
         Component: liberation-fonts
          Severity: medium
          Priority: unspecified
          Assignee: psatpute at redhat.com
          Reporter: gitne at excite.co.jp
        QA Contact: extras-qa at fedoraproject.org
                CC: fonts-bugs at lists.fedoraproject.org,
                    i18n-bugs at lists.fedoraproject.org,
                    petersen at redhat.com, psatpute at redhat.com

The pixel aliasing of glyphs, especially vertical lines/parts is broken since
version 2.00 on Windows (renderer). This applies to all Liberation Font types
when ClearType is off, i.e. with gray-scale anti-aliasing only. Version 2.00
has incurred aliasing for all font sizes. Version 2.00.1 fixed this by
disabling anti-aliasing for sizes < 14pt. Yet, vertical lines/parts and some
transitions from curves to lines are still rendered incorrectly or with
artifacts.

This may also apply to Fedora GNOME desktops, but it has been observed on
Windows first.

Although, I am not a font design specialist, I suppose that this problem exists
because version 2.00 is based on Google Crosscore fonts and hinting information
for small font sizes is missing.
This is a show stopper for software rendering Libration Fonts on pixel based
digital displays. Software packages like LibréOffice are also negatively
affected by this issue (although on displays only). Please resolve this issue
or revert verion 2.00 and later to beta status.


How to reproduce:
Windows XP/2003
Compare Liberation Fonts version 1.07 to version 2.00.1 for small font sizes <
14pt.

Windows Vista and later
Disable ClearType
Compare Liberation Fonts version 1.07 to version 2.00.1 for small font sizes <
14pt. Version 1.07 has been correctly hinted, hence is perfectly pixel aligned.

-- 
You are receiving this mail because:
You are on the CC list for the bug.
Unsubscribe from this bug https://bugzilla.redhat.com/token.cgi?t=lAiO50lKoF&a=cc_unsubscribe