The test renders QCalendarWidget, which ends up in the QStyle code eventually. On macOS we use a CGContext to draw the native style, into the test's image/paint device, but CGBitmapContextCreate does not support QImage::Format_ARGB32. It needs either a premultiplied alpha, or no alpha at all. The unification of the palette for the calendar, as is done for Windows, is also needed on macOS. Change-Id: I5b26e5434b84e4b14eb8784875b76810e0a14230 Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io> (cherry picked from commit a5292ad2f58252f392ad272f8c99a31c43d175a8) Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
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