[Libreoffice-bugs] [Bug 119940] Bolding a Hebrew word in a sentence with David CTL font changes the intra-word spacing of surrounding words

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=119940

--- Comment #6 from Maxim Iorsh <iorsh at users.sourceforge.net> ---
The bold word במסמך is 3% narrower than the regular one. It looks like the
change in width due to emboldening moves the successive glyphs by a fraction of
a pixel, thus making some glyphs move a pixel and others just stay in place.

This is probably a limitation of the renderer which would take some effort to
resolve.

Some higher-end TrueType fonts employ subpixel instructing technique to
overcome this issue at small font sizes (i.e. where glyph height doesn't exceed
12-15 pixels). This technique requires a huge amount of work on the affected
font, and you would probably buy a retina display long before I get to do it.

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