func rect(x, y, w, h C.double) cairo.Rectangle {
return cairo.RectWH(float64(x), float64(y), float64(w), float64(h))
}
LineTo(rbsyr).
CurveTo(rb, rb, rbsxr).
LineTo(lbaxr).
CurveTo(lb, lb, ltayr)
}
}
c.ClosePath()
c.SetSourceColor(cairo.Color{.5, .5, 1})
c.FillPreserve()
c.SetSourceColor(cairo.AlphaColor{R: .5, A: .5})
c.SetLineWidth(10)
c.Stroke()
}
curveRect(c, cairo.RectWH(25.6, 25.6, 204.8, 204.8), 102.4)
return nil
}},
{"curve-to", func(c *cairo.Context) error {
ps := pt(25.6, 128)
p1 := pt(102.4, 230.4)
p2 := pt(153.6, 25.6)
p3 := pt(230.4, 128)
c.
MoveTo(ps).
CurveTo(p1, p2, p3).
SetLineWidth(10).
Stroke()
c.