Add property live, if contentItem is WSurfaceItemContent, setting live to false will not notify client to draw the next frame. In other cases, this property will not take effect. And will always return true(delegate) or false(no contentItem).
Log: add property live to support freezing surface.
Add property live, if contentItem is WSurfaceItemContent, setting live to false will not notify client to draw the next frame. In other cases, this property will not take effect. And will always return true(delegate) or false(no contentItem).
Log: add property live to support freezing surface.