SetLineWidth is proportionally scaled,
How to change only the height of the line instead of its width
For example, the image at the bottom
func TestAA(t *testing.T) {
dc := gg.NewContext(1000, 1000)
dc.SetRGB(1, 1, 1)
dc.Clear()
dc.SetRGB(0, 0, 0)
w := 0.1
for i := 100; i <= 900; i += 20 {
x := float64(i)
dc.DrawLine(x+50, 0, x-50, 1000)
dc.SetLineWidth(w)
dc.SetDash(2, 8, 8, 16)
dc.Stroke()
w += 0.2
}
dc.SavePNG("out11.png")
}

