- 
    Bug 
- 
    Resolution: Won't Do
- 
    P3: Somewhat important 
- 
    None
- 
    5.15.15
A reproducer:
Window {
    width: 640
    height: 480
    visible: true
    title: qsTr("Hello World")
    ChartView {
        title: "Line Chart"
        anchors.fill: parent
        antialiasing: true
        LineSeries {
            useOpenGL: true
            name: "Line"
            XYPoint {
                x: 0
                y: 0
            }
            XYPoint {
                x: 1.1
                y: 2.1
            }
            XYPoint {
                x: 1.9
                y: 3.3
            }
            XYPoint {
                x: 2.1
                y: 2.1
            }
            XYPoint {
                x: 2.9
                y: 4.9
            }
            XYPoint {
                x: 3.4
                y: 3
            }
            XYPoint {
                x: 4.1
                y: 3.3
            }
        }
    }
}
Set useOpenGL to true and false and deploy to target, one can see that with useOpenGL enabled, the line is less sharp, looking blurred and under-antialiased. I am testing on a Apalis iMX6 which has Vivante GC2000 GPU. So OpenGL ES should be supported.
I am still trying to take screenshot for target though. Also, testing Qt 6.