package raster import ( "bufio" "image" "image/color" "image/png" "log" "os" "testing" "code.google.com/p/freetype-go/freetype/raster" "github.com/llgcode/draw2d/curve" ) var flattening_threshold float64 = 0.5 func savepng(filePath string, m image.Image) { f, err := os.Create(filePath) if err != nil { log.Println(err) os.Exit(1) } defer f.Close() b := bufio.NewWriter(f) err = png.Encode(b, m) if err != nil { log.Println(err) os.Exit(1) } err = b.Flush() if err != nil { log.Println(err) os.Exit(1) } } type Path struct { points []float64 } func (p *Path) LineTo(x, y float64) { if len(p.points)+2 > cap(p.points) { points := make([]float64, len(p.points)+2, len(p.points)+32) copy(points, p.points) p.points = points } else { p.points = p.points[0 : len(p.points)+2] } p.points[len(p.points)-2] = x p.points[len(p.points)-1] = y } func TestFreetype(t *testing.T) { var p Path p.LineTo(10, 190) c := curve.CubicCurveFloat64{10, 190, 10, 10, 190, 10, 190, 190} c.Trace(&p, flattening_threshold) poly := Polygon(p.points) color := color.RGBA{0, 0, 0, 0xff} img := image.NewRGBA(image.Rect(0, 0, 200, 200)) rasterizer := raster.NewRasterizer(200, 200) rasterizer.UseNonZeroWinding = false rasterizer.Start(raster.Point{raster.Fix32(10 * 256), raster.Fix32(190 * 256)}) for j := 0; j < len(poly); j = j + 2 { rasterizer.Add1(raster.Point{raster.Fix32(poly[j] * 256), raster.Fix32(poly[j+1] * 256)}) } painter := raster.NewRGBAPainter(img) painter.SetColor(color) rasterizer.Rasterize(painter) savepng("_testFreetype.png", img) } func TestFreetypeNonZeroWinding(t *testing.T) { var p Path p.LineTo(10, 190) c := curve.CubicCurveFloat64{10, 190, 10, 10, 190, 10, 190, 190} c.Trace(&p, flattening_threshold) poly := Polygon(p.points) color := color.RGBA{0, 0, 0, 0xff} img := image.NewRGBA(image.Rect(0, 0, 200, 200)) rasterizer := raster.NewRasterizer(200, 200) rasterizer.UseNonZeroWinding = true rasterizer.Start(raster.Point{raster.Fix32(10 * 256), raster.Fix32(190 * 256)}) for j := 0; j < len(poly); j = j + 2 { rasterizer.Add1(raster.Point{raster.Fix32(poly[j] * 256), raster.Fix32(poly[j+1] * 256)}) } painter := raster.NewRGBAPainter(img) painter.SetColor(color) rasterizer.Rasterize(painter) savepng("_testFreetypeNonZeroWinding.png", img) } func TestRasterizer(t *testing.T) { img := image.NewRGBA(image.Rect(0, 0, 200, 200)) var p Path p.LineTo(10, 190) c := curve.CubicCurveFloat64{10, 190, 10, 10, 190, 10, 190, 190} c.Trace(&p, flattening_threshold) poly := Polygon(p.points) color := color.RGBA{0, 0, 0, 0xff} tr := [6]float64{1, 0, 0, 1, 0, 0} r := NewRasterizer8BitsSample(200, 200) //PolylineBresenham(img, image.Black, poly...) r.RenderEvenOdd(img, &color, &poly, tr) savepng("_testRasterizer.png", img) } func TestRasterizerNonZeroWinding(t *testing.T) { img := image.NewRGBA(image.Rect(0, 0, 200, 200)) var p Path p.LineTo(10, 190) c := curve.CubicCurveFloat64{10, 190, 10, 10, 190, 10, 190, 190} c.Trace(&p, flattening_threshold) poly := Polygon(p.points) color := color.RGBA{0, 0, 0, 0xff} tr := [6]float64{1, 0, 0, 1, 0, 0} r := NewRasterizer8BitsSample(200, 200) //PolylineBresenham(img, image.Black, poly...) r.RenderNonZeroWinding(img, &color, &poly, tr) savepng("_testRasterizerNonZeroWinding.png", img) } func BenchmarkFreetype(b *testing.B) { var p Path p.LineTo(10, 190) c := curve.CubicCurveFloat64{10, 190, 10, 10, 190, 10, 190, 190} c.Trace(&p, flattening_threshold) poly := Polygon(p.points) color := color.RGBA{0, 0, 0, 0xff} for i := 0; i < b.N; i++ { img := image.NewRGBA(image.Rect(0, 0, 200, 200)) rasterizer := raster.NewRasterizer(200, 200) rasterizer.UseNonZeroWinding = false rasterizer.Start(raster.Point{raster.Fix32(10 * 256), raster.Fix32(190 * 256)}) for j := 0; j < len(poly); j = j + 2 { rasterizer.Add1(raster.Point{raster.Fix32(poly[j] * 256), raster.Fix32(poly[j+1] * 256)}) } painter := raster.NewRGBAPainter(img) painter.SetColor(color) rasterizer.Rasterize(painter) } } func BenchmarkFreetypeNonZeroWinding(b *testing.B) { var p Path p.LineTo(10, 190) c := curve.CubicCurveFloat64{10, 190, 10, 10, 190, 10, 190, 190} c.Trace(&p, flattening_threshold) poly := Polygon(p.points) color := color.RGBA{0, 0, 0, 0xff} for i := 0; i < b.N; i++ { img := image.NewRGBA(image.Rect(0, 0, 200, 200)) rasterizer := raster.NewRasterizer(200, 200) rasterizer.UseNonZeroWinding = true rasterizer.Start(raster.Point{raster.Fix32(10 * 256), raster.Fix32(190 * 256)}) for j := 0; j < len(poly); j = j + 2 { rasterizer.Add1(raster.Point{raster.Fix32(poly[j] * 256), raster.Fix32(poly[j+1] * 256)}) } painter := raster.NewRGBAPainter(img) painter.SetColor(color) rasterizer.Rasterize(painter) } } func BenchmarkRasterizerNonZeroWinding(b *testing.B) { var p Path p.LineTo(10, 190) c := curve.CubicCurveFloat64{10, 190, 10, 10, 190, 10, 190, 190} c.Trace(&p, flattening_threshold) poly := Polygon(p.points) color := color.RGBA{0, 0, 0, 0xff} tr := [6]float64{1, 0, 0, 1, 0, 0} for i := 0; i < b.N; i++ { img := image.NewRGBA(image.Rect(0, 0, 200, 200)) rasterizer := NewRasterizer8BitsSample(200, 200) rasterizer.RenderNonZeroWinding(img, &color, &poly, tr) } } func BenchmarkRasterizer(b *testing.B) { var p Path p.LineTo(10, 190) c := curve.CubicCurveFloat64{10, 190, 10, 10, 190, 10, 190, 190} c.Trace(&p, flattening_threshold) poly := Polygon(p.points) color := color.RGBA{0, 0, 0, 0xff} tr := [6]float64{1, 0, 0, 1, 0, 0} for i := 0; i < b.N; i++ { img := image.NewRGBA(image.Rect(0, 0, 200, 200)) rasterizer := NewRasterizer8BitsSample(200, 200) rasterizer.RenderEvenOdd(img, &color, &poly, tr) } }