[kde] [Bug 505029] New: Sub-pixel font smoothing is disabled on translucent backgrounds

[Tech-Tac]

https://bugs.kde.org/show_bug.cgi?id=505029

            Bug ID: 505029
           Summary: Sub-pixel font smoothing is disabled on translucent
                    backgrounds
    Classification: I don't know
           Product: kde
      Version First unspecified
       Reported In:
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: unassigned-bugs at kde.org
          Reporter: im.tech.tac at gmail.com
  Target Milestone: ---

When sub-pixel font smoothing is enabled in font settings, it would work
everywhere* except in places where the background of the text is
semi-transparent (which is quite common in modern themes) where it instead
reverts to full-pixel grayscale anti-aliasing.

This doesn't seem to apply to shell widgets.

EXAMPLES
1. All menus when setting menu transparency to any value other than 100% in
Breeze application style config
2. Konsole when background color transparency is enabled
3. Window titles when Breeze or Oxygen window decoration themes are selected,
but not Plastique (https://bugs.kde.org/show_bug.cgi?id=460840), though not
sure this is because of transparency

OBSERVED RESULT
Grayscale anti-aliasing

EXPECTED RESULT
Blended sub-pixel RGB smoothing

SOFTWARE/OS VERSIONS
Arch Linux
KDE Plasma Version: 6.3.5
KDE Frameworks Version: 6.14.0
Qt Version: 6.9.0

ADDITIONAL INFORMATION
This may be a Qt issue

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