Function TestMultiFunction

paint/raster/raster_test.go:571–616

TestMultiFunction tests a Dasher's ability to function as a filler, stroker, and dasher by invoking the corresponding anonymous structs

(t *testing.T)

// TestMultiFunction tests a Dasher's ability to function
// as a filler, stroker, and dasher by invoking the corresponding anonymous structs
func TestMultiFunction(t *testing.T) {

	var (
		wx, wy  = 512, 512
		img     = image.NewRGBA(image.Rect(0, 0, wx, wy))
		scanner = scan.NewScanner(scan.NewImgSpanner(img), wx, wy)
	)

	scanner.SetColor(colors.Uniform(colors.Cornflowerblue))
	d := NewDasher(wx, wy, scanner)
	d.SetStroke(10*64, 4*64, RoundCap, nil, RoundGap, ArcClip, []float32{33, 12}, 0)
	// p is in the shape of a capital Q
	p := GetTestPath()

	f := &d.Filler // This is the anon Filler in the Dasher. It also satisfies
	// the Rasterizer interface, and will only perform a fill on the path.

	p.AddTo(f)

	extentR := scanner.GetPathExtent()
	x := int(extentR.Max.X)
	y := int(extentR.Max.Y)
	if x != 13445 && y != 15676 {
		t.Error("test extent Max value not as expected")
	}
	f.Draw()
	f.Clear()

	scanner.SetColor(colors.Uniform(colors.Cornsilk))

	s := &d.Stroker // This is the anon Stroke in the Dasher. It also satisfies
	// the Rasterizer interface, but will perform a fill on the path.
	p.AddTo(s)
	s.Draw()
	s.Clear()

	scanner.SetColor(colors.Uniform(colors.Darkolivegreen))

	// Now lets use the Dasher itself; it will perform a dashed stroke if dashes are set
	// in the SetStroke method.
	p.AddTo(d)
	d.Draw()
	d.Clear()

	imagex.Assert(t, img, "tmf")
}