[kde] [Bug 471443] Low-res Images in Qt Apps when using fractional scaling

[Max Staff]

https://bugs.kde.org/show_bug.cgi?id=471443

--- Comment #1 from Max Staff <bright.joy7094 at mstaff.dev> ---
Telegram Desktop issues:
https://github.com/telegramdesktop/tdesktop/issues/26155
https://github.com/telegramdesktop/tdesktop/issues/17173
https://github.com/telegramdesktop/tdesktop/issues/25961

Explanation of the problem (see block below screenshot, item no 4):
https://github.com/telegramdesktop/tdesktop/issues/25126
That one also contains links to the respective Qt bugreports, in case they
change the text after this bugreport here's a copy:

> Icons and emojis are blurry #17173 - exists only in third-party builds, was reported as https://bugreports.qt.io/browse/QTBUG-95930, https://bugreports.qt.io/browse/QTBUG-99546 and https://bugreports.qt.io/browse/QTBUG-110626, Qt tried to fix this, but then reverted, so apparently they think there's no bug on their side and this needs a report to KDE as they probably use the wrong API to tell scale factor to Qt. According to https://doc.qt.io/qt-6/highdpi.html, QT_SCREEN_SCALE_FACTORS is in line with debug-only environment variables KDE shouldn't set.

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