[Libreoffice-bugs] [Bug 142940] Fonts are poorly rendered to display with pair kerning enabled, means to control without losing published quality

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=142940

V Stuart Foote <vstuart.foote at utsa.edu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|REOPENED                    |UNCONFIRMED
           Keywords|                            |needsUXEval
     Ever confirmed|1                           |0
            Summary|Enabling pair kerning       |Fonts are poorly rendered
                   |breaks rendering of many    |to display with pair
                   |common fonts                |kerning enabled, means to
                   |                            |control without losing
                   |                            |published quality
                 CC|                            |libreoffice-ux-advise at lists
                   |                            |.freedesktop.org

--- Comment #15 from V Stuart Foote <vstuart.foote at utsa.edu> ---
It remains an issue of available precision, the rounding errors and coarseness
of glyph placement onto a pixel based screen canvas can not physically do much
better compared to the print and PDF export which have much higher precision
(and where font kerning is functional). 

Addressing bug 10332 would allow effective sub-pixel rendering and more
appealing font kerning on displays.

Until then while substituting fonts, the 'Always' or 'Screen Only' choices on
the Tools -> Options -> Fonts 'Replacement Table' demonstrates a precedent for
handling rendering to VCL screen canvas distinct from printing/PDF generation.

I have not looked at the methods, but imagine similar mechanism could be
applied to font kerning--just a reversed sense, 'Never' or for 'Printing/PDF
Only' output. Maybe even located on the same Tools -> Fonts panel as it should
be applied globally.

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