I tried it, not really the class I need, but it is good to know there are a tool
like that exist. It is not suit for my need because the image have to repaint
when specific properties change(interval, minimum slope etc), so I design
a custom image by QQuickPaintedItem.
The next experiment is try to use the gpu and cpu together to render the
image and show them on the qml scene, lot of things have to learn.However,
process the image is fun, it is even more interesting to play it with Qt.