Details
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Bug
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Resolution: Fixed
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P1: Critical
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6.9.0 RC
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All
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7a238e122 (dev), 04cb0a1b5 (6.9), c63c918f3 (6.9.0)
Description
QLabel scaled pixmap doesn't work correctly: bad image quality and high memory usage.
Running LabelPixmapTest.zip
:
- labelpixmaptest_673.mp4 Qt 6.7.3 - after animation memory usage is around 15 MiB
- labelpixmaptest_69rc.mp4 Qt 6.9 RC - after animation memory usage is around 720 MiB
Please watch attached videos to see the image quality.
Attachments
Issue Links
- resulted from
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QTBUG-122403 QLabel should take a QIcon (instead a QPixmap)
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- Reported
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| For Gerrit Dashboard: QTBUG-134930 | ||||||
|---|---|---|---|---|---|---|
| # | Subject | Branch | Project | Status | CR | V |
| 633001,3 | QLabel: don't cache scaled pixmap in QIcon | dev | qt/qtbase | Status: MERGED | +2 | 0 |
| 633299,2 | QLabel: don't cache scaled pixmap in QIcon | 6.9 | qt/qtbase | Status: MERGED | +2 | 0 |
| 633352,2 | QLabel: don't cache scaled pixmap in QIcon | 6.9.0 | qt/qtbase | Status: MERGED | +2 | 0 |