They are initially white instead of gray with zeros. Apparently the first onPaint call of the canvas elemnts doesn't have an effect. I've added a little hook into onPainted to save the results of the first and second painting as images. Clearly, the first one is blank and the second one has some content.
|For Gerrit Dashboard: QTBUG-38297|
|83373,1||QmlProfiler: Always reset the context before drawing on a canvas||3.1||qt-creator/qt-creator||Status: MERGED||+2||0|
|83375,2||Make sure the clipPath is retained as state of Context2D||release||qt/qtdeclarative||Status: MERGED||+2||0|