Details
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Bug
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Resolution: Fixed
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P2: Important
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6.5.1
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macOS
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d24c8ba5f (dev), 48c176e1b (dev), 1696091c5 (6.8), a1030dffd (tqtc/lts-6.5)
Description
Open Calqlatr example : https://doc.qt.io/qt-6/qtdoc-demos-calqlatr-example.html
Change the RHI backend to OpenGL :
qputenv("QSG_RHI_BACKEND", "opengl");
Run the example. Move the window between MacBook screen and external monitor. Observe that content is stuck in wrong dimensions. See the attached video.
Looks like some kind of DPI issue and triggering a UI event (e.g. window resize) seems to fix it. Note that it is only reproducible with OpenGL backend. Metal backend works fine.
Display information :
➜ system_profiler SPDisplaysDataType
Graphics/Displays: Apple M1 Max: Chipset Model: Apple M1 Max
Type: GPU
Bus: Built-In
Total Number of Cores: 24
Vendor: Apple (0x106b)
Metal Support: Metal 3
Displays:
Color LCD:
Display Type: Built-in Liquid Retina XDR Display
Resolution: 3456 x 2234 Retina
Main Display: Yes
Mirror: Off
Online: Yes
Automatically Adjust Brightness: Yes
Connection Type: Internal
PHL 346E2C:
Resolution: 3440 x 1440 (UWQHD - Ultra-Wide Quad HD)
UI Looks like: 3440 x 1440 @ 75.00Hz
Mirror: Off
Online: Yes
Rotation: Supported
Attachments
| For Gerrit Dashboard: QTBUG-114873 | ||||||
|---|---|---|---|---|---|---|
| # | Subject | Branch | Project | Status | CR | V |
| 600261,2 | widgets: Defer repaint on screen/dpr change to expose/update request | dev | qt/qtbase | Status: MERGED | +2 | 0 |
| 600280,2 | macOS: Update NSOpenGLContext drawable on beginning of frame if needed | dev | qt/qtbase | Status: MERGED | +2 | 0 |
| 601972,2 | macOS: Update NSOpenGLContext drawable on beginning of frame if needed | 6.8 | qt/qtbase | Status: MERGED | +2 | 0 |
| 602018,2 | macOS: Update NSOpenGLContext drawable on beginning of frame if needed | tqtc/lts-6.5 | qt/tqtc-qtbase | Status: MERGED | +2 | 0 |