The software backend and opengl backend have same as bug, so I think the bug is not related to scene graphics backend. I conjecture this bug is related to QQuickRotation::applyTo, It's use the QMatrix4x4::projectedRotate, In elsewhere, this QMatrix4x4 will be converted to a QTransform, so I started testing QTransform, and found those problems using it with QImage for rotate. ________________________________ From: Allan Sandfeld Jensen <k...@carewolf.com> Sent: Wednesday, July 20, 2022 16:47 To: development@qt-project.org <development@qt-project.org>; JiDe Zhang <zc...@live.com> Subject: Re: [Development] What is the correct way to use QTransform to rotate a QImage by the Y axis?
On Mittwoch, 20. Juli 2022 10:43:36 CEST JiDe Zhang wrote: > I trying fix > https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugreports.qt.io%2Fbrowse%2FQTBUG-75954&data=05%7C01%7C%7C23d7f64cd4714c88d47508da6a2c8103%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637939036634730765%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=EMVm0A3nA5c8qDEy8myCQrOq6DwTWW5VE0r6StkUflc%3D&reserved=0, > I think the > problem is related to it. Interesting. Might be worth checking out if it acts differently between different scenegraph backends. RHI OpenGL vs Software for instance. Not sure we would be doing the transform on qimages unless in software mode. Best regards Allan
_______________________________________________ Development mailing list Development@qt-project.org https://lists.qt-project.org/listinfo/development
