https://bugs.kde.org/show_bug.cgi?id=374095
Bug ID: 374095
Summary: QOffscreenSurface created off the main/gui thread
Product: kdenlive
Version: 16.12.0
Platform: Compiled Sources
OS: OS X
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: Video Display & Export
Assignee: j...@kdenlive.org
Reporter: rjvber...@gmail.com
Target Milestone: ---
Since v 16.8.x I'm seeing startup warnings/errors on the calling terminal,
under OS X:
```
Attempting to create QWindow-based QOffscreenSurface outside the gui thread.
Expect failures.
2016-12-23 19:13:17.058 kdenlive[1807:e103] invalid drawable
Attempting to create QWindow-based QOffscreenSurface outside the gui thread.
Expect failures.
2016-12-23 19:13:17.071 kdenlive[1807:e103] invalid drawable
2016-12-23 19:13:43.139 kdenlive[1807:e103] invalid drawable
2016-12-23 19:13:43.281 kdenlive[1807:e103] invalid drawable
```
The "invalid drawable" messages also appear in the System.log indicating that
they were made with `NSLog()`, presumably by Qt.
I haven't investigated this yet because I didn't notice any feature loss or
issues, but it's probably worth raising the issue. Doing OpenGL graphics off
the main thread used to be a sure recipe for Mac KPs, and Qt still doesn't work
properly when the event loop isn't handled on the main thread.
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