[Libreoffice-bugs] [Bug 138122] LibreOffice text blurry on Retina displays on macOS 11

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=138122

--- Comment #58 from Telesto <telesto at surfxs.nl> ---
(In reply to lupurus from comment #57)
> (In reply to Tor Lillqvist from comment #56)
> > Text is drawn in AquaSalGraphics::DrawTextLayout() in vcl/quartz/salgdi.cxx,
> > as far as I recall. Look for the CTFontDrawGlyphs() call.
> 
> Thank you. I am kind of frustrated right now, I tried a lot of different
> settings like 'CGContextSetAllowsFontSmoothing' for example... nothing
> helped. I am still wondering: Why is the font in the main view, the status
> bar, the combobox area blurred, but the text in the TOC or where you can
> select the text styles for example or in other menus not? Are they using
> different methods?

Not having Big Sur installed, yet (and kind a reluctant to do so). So not
having much to go on.. based on screenshots tend say that they stuff is painted
as an image at low resolution (72/96 dpi) (without prior anti-aliasing)

Bit like saving QR code into DOCX format (and file reload). They SVG rendering
simply quality simply bad (looks like miniature thumbnail quality being
over-sized). And File -> Export formats do have also a bad ugly compression
flaw somewhere. But surely depends on code paths :-( So not all export formats
are affected 

And also which branch did you use? Master or 7.0? There where more code changes
also related to anti-aliasing and image rendering (see Skia meta). Not sure if
they his code simply limited to Skia or having large reach.

If so, bugs might have stacked up (worst case)? I assume you build without or
include they Stephan hack while nobody actually has clue what it does? As it
did work previously?

Also there is a risk that Apple dropped support for XYZ in Big Sur (or didn't
notice they broke some legacy stuff nobody supposed to use anymore). So maybe
Catalina without Stephan Bergmans patch? Not even remembering when/how the
initial bug started. Except they Xcode magic an later-on they hack?

Note: only few things crossing my mind :-). Not saying it's of any use. However
prefer to exclude some possibility's. Or might open a different perspective. 

Anyhow thanks for attempting for solving the mystery :-)

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