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Type:
Bug
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Status: Closed
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Priority:
P2: Important
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Resolution: Done
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Affects Version/s: 5.2.0 Beta1 , 5.2.0 RC1, 5.2.0, 5.3.0 RC1, 5.3.0
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Fix Version/s: 5.7.0 RC
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Component/s: GUI: Painting
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Labels:
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Environment:Developed on OS X 10.8.5 with Xcode 4.6.3.
Deployed to an iPad 1 with iOS 5.1.1 and an iPhone 5 with iOS 6.1.4.
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Platform/s:
On iOS (tested on 5.1.1 and 6.1.4), QGraphicsItem objects are drawn without antialiasing no matter what flags are chosen for the QGraphicsView object. This can be reproduced by creating a QGraphicsView, a QGraphicsScene and adding an ellipse or any custom drawn QGraphicsItem to the scene.
QGraphicsSvgItem objects are antialiased but their resolution isn't adjusted for Retina screens.
This is actually a general problem with antialiasing since it is not working with a simple QPainter case either, example attached shows that this is not antialiased at all. This seems to be because OpenGL ES 2 is being used which does not turn on GL_MULTISAMPLE.