Custom path for the shape

CustomPath.kt

fun drawArcPath(size: Size): Path {
    return Path().apply {
        reset()

        // go from (0,0) to (width, 0)
        lineTo(size.width, 0f)

        // go from (width, 0) to (width, height)
        lineTo(size.width, size.height)

        // Draw an arch from (width, height) to (0, height)
        // starting from 0 degree to 180 degree
        arcTo(
            rect =
                Rect(
                    Offset(0f, 0f),
                    Size(size.width, size.height)
                ),
            startAngleDegrees = 0f,
            sweepAngleDegrees = 180f,
            forceMoveTo = false
        )

        // go from (0, height) to (0, 0)
        lineTo(0f, 0f)
        close()
    }
}