[Libreoffice-bugs] [Bug 136674] U+2019 (and U+2018) from DejaVu Sans fonts incorrectly rendered in LO synthetic italics -- Skia Vulkan and raster rendering only, OK with OpenGL and default GDI rendering

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=136674

--- Comment #23 from V Stuart Foote <vstuart.foote at utsa.edu> ---
(In reply to Ming Hua from comment #22)
> One more thing: I disagree with Stuart's diagnosis that this is a problem
> related to LO's *synthetic* italics.
> 
> On my system -- which should also apply to everyone else, as DejaVu only has
> this one form of distribution, and it's also bundled with LO -- DejaVu Sans
> (same situation with the other two problematic fonts, Sans Mono and Sans
> Condensed) is represented by four separate TTF files: DejaVuSans.ttf for
> regular, DejaVuSans-Oblique.ttf for italic, DejaVuSans-Bold.ttf for bold,
> and DejaVuSans-BoldOblique.ttf for bold-italic.  There should be no reason
> for LO to synthesize italic forms from the regular forms, instead of just
> using the italic font directly.

Oh, that is probably right. I was focusing on the reported issue of OP and
pared it down to a nice simple reproducer. However, the DejaVu would have
composite font family that might have issues mapping the Oblique/Oblique Bold. 
Becomes obvious if I use the Character... dialog to make the font changes
rather than the TB.

So is it a Harfbuzz font mishandling, or a Skia rendering issue?

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