Details
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Bug
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Resolution: Fixed
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P3: Somewhat important
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6.5.0 FF
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None
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Linux/X11
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d982f5211 (6.4), 8071e3c2a (dev), 4096667d6 (dev), f20f1c6b7 (6.4), 0b94530a3 (6.5), b464119dd (dev), c64ac301e (6.5)
Description
When multiple images are rendered and moved within their parent widget, QXcbBackingStore::toImage() returns a QImage where the last move is not properly reflected.
All widgets are correctly displayed on the screen.
QXcbBackingStore::recreateImage() cannot be called within toImage() because the latter is const, while the former is not.
The test functions tst_QWidgetRepainManager::fastMove(), moveAcross(), moveInOutOverlapped() fail/flake on XCB because of that.
The images attached show the following:
grab_<testFunction>_.png represent what is displayed physically on the screen.
backingstore_<testFunction>_.png represent the corresponding QXcbBackingStore::toImage() result.
Attachments
| For Gerrit Dashboard: QTBUG-109036 | ||||||
|---|---|---|---|---|---|---|
| # | Subject | Branch | Project | Status | CR | V |
| 453343,2 | WIP: Reproduce QXcbBackingStore::toImage() failure | dev | qt/qtbase | Status: NEW | -2 | 0 |
| 446083,2 | Blacklist tst_QWidgetRepainManager functions flaking on XCB | dev | qt/qtbase | Status: MERGED | +2 | 0 |
| 446128,2 | Blacklist tst_QWidgetRepainManager functions flaking on XCB | 6.4 | qt/qtbase | Status: MERGED | +2 | 0 |
| 452737,7 | Fix tst_QWidgetRepaintManager on XCB | dev | qt/qtbase | Status: MERGED | +2 | 0 |
| 453003,2 | Fix tst_QWidgetRepaintManager on XCB | 6.5 | qt/qtbase | Status: MERGED | +2 | 0 |
| 453004,2 | Fix tst_QWidgetRepaintManager on XCB | 6.4 | qt/qtbase | Status: MERGED | +2 | 0 |
| 458354,2 | Unblacklist stable tst_QWidgetRepaintManager | dev | qt/qtbase | Status: MERGED | +2 | 0 |
| 458377,2 | Unblacklist stable tst_QWidgetRepaintManager | 6.5 | qt/qtbase | Status: MERGED | +2 | 0 |