Support filled beziercurve rendering (#92)

* support filled beziercurve rendering
* fix testdata
* fix threshold

Author: goccy

alias.go

@@ -314,7 +314,7 @@ const (
 	DiagonalsNodeStyle = cgraph.DiagonalsNodeStyle
 	FilledNodeStyle    = cgraph.FilledNodeStyle
 	StripedNodeStyle   = cgraph.StripedNodeStyle
-	WedgesNodeStyle    = cgraph.WedgesNodeStyle
+	WedgedNodeStyle    = cgraph.WedgedNodeStyle
 )
 
 const (

cgraph/attribute.go

@@ -2523,7 +2523,7 @@ const (
 	DiagonalsNodeStyle NodeStyle = "diagonals"
 	FilledNodeStyle    NodeStyle = "filled"
 	StripedNodeStyle   NodeStyle = "striped"
-	WedgesNodeStyle    NodeStyle = "wedged"
+	WedgedNodeStyle    NodeStyle = "wedged"
 )
 
 type EdgeStyle string

compatible_test.go

@@ -25,7 +25,7 @@ var (
 )
 
 const (
-	imageThreshold = 30
+	imageThreshold = 40
 )
 
 func generateTestData() error {
@@ -73,9 +73,9 @@ func generateTestData() error {
 
 func TestGraphviz_Compatible(t *testing.T) {
 	// generate testdata/imagehash.json
-	//	if err := generateTestData(); err != nil {
-	//		t.Fatal(err)
-	//	}
+	//if err := generateTestData(); err != nil {
+	//	t.Fatal(err)
+	//}
 	var pathToHashDump map[string]string
 	file, err := os.ReadFile(imageHashJSON)
 	if err != nil {

gvc/image_renderer.go

@@ -195,11 +195,18 @@ func (r *ImageRenderer) Polyline(ctx context.Context, job *Job, a []*PointFloat)
 	return nil
 }
 
-func (r *ImageRenderer) BezierCurve(ctx context.Context, job *Job, a []*PointFloat) error {
+func (r *ImageRenderer) BezierCurve(ctx context.Context, job *Job, a []*PointFloat, filled bool) error {
 	r.ctx.Push()
 	defer r.ctx.Pop()
 	r.setPenStyle(job)
-	rgba := job.Object().PenColor().RGBAUint()
+	var c *Color
+	if filled {
+		c = job.Object().FillColor()
+		r.ctx.FillPreserve()
+	} else {
+		c = job.Object().PenColor()
+	}
+	rgba := c.RGBAUint()
 	r.ctx.SetRGB(float64(rgba[0])/255.0, float64(rgba[1])/255.0, float64(rgba[2])/255.0)
 	r.ctx.MoveTo(r.toX(job, a[0].X()), r.toY(job, -a[0].Y()))
 	for i := 1; i < len(a); i += 3 {
@@ -212,7 +219,11 @@ func (r *ImageRenderer) BezierCurve(ctx context.Context, job *Job, a []*PointFlo
 			r.toY(job, -a[i+2].Y()),
 		)
 	}
-	r.ctx.Stroke()
+	if filled {
+		r.ctx.Fill()
+	} else {
+		r.ctx.Stroke()
+	}
 	return nil
 }
 

gvc/render_plugin.go

@@ -41,7 +41,7 @@ type RenderEngine interface {
 	ResolveColor(ctx context.Context, job *Job, color *Color) error
 	Ellipse(ctx context.Context, job *Job, points []*PointFloat, filled bool) error
 	Polygon(ctx context.Context, job *Job, points []*PointFloat, filled bool) error
-	BezierCurve(ctx context.Context, job *Job, points []*PointFloat) error
+	BezierCurve(ctx context.Context, job *Job, points []*PointFloat, filled bool) error
 	Polyline(ctx context.Context, job *Job, points []*PointFloat) error
 	Comment(ctx context.Context, job *Job, comment string) error
 	LibraryShape(ctx context.Context, job *Job, s string, points []*PointFloat, filled bool) error
@@ -154,7 +154,7 @@ func (e *DefaultRenderEngine) Polygon(_ context.Context, _ *Job, _ []*PointFloat
 	return nil
 }
 
-func (e *DefaultRenderEngine) BezierCurve(_ context.Context, _ *Job, _ []*PointFloat) error {
+func (e *DefaultRenderEngine) BezierCurve(_ context.Context, _ *Job, _ []*PointFloat, _ bool) error {
 	return nil
 }
 
@@ -471,12 +471,12 @@ func newRenderEngine(ctx context.Context, engine RenderEngine) (*wasm.RenderEngi
 	}, ptr)); err != nil {
 		return nil, err
 	}
-	if err := e.SetBeziercurve(ctx, wasm.CreateCallbackFunc(func(ctx context.Context, job *wasm.Job, p []*wasm.PointFloat, _ uint32, _ int) error {
+	if err := e.SetBeziercurve(ctx, wasm.CreateCallbackFunc(func(ctx context.Context, job *wasm.Job, p []*wasm.PointFloat, _ uint32, filled int) error {
 		points := make([]*PointFloat, len(p))
 		for i := range p {
 			points[i] = toPointFloat(p[i])
 		}
-		return engine.BezierCurve(ctx, toJob(job), points)
+		return engine.BezierCurve(ctx, toJob(job), points, filled > 0)
 	}, ptr)); err != nil {
 		return nil, err
 	}
@@ -939,6 +939,14 @@ func (s *ObjectState) SetFillColor(v *Color) {
 	s.wasm.SetFillcolor(v.getWasm())
 }
 
+func (s *ObjectState) StopColor() *Color {
+	return toColor(s.wasm.GetStopcolor())
+}
+
+func (s *ObjectState) RawStyle() []string {
+	return s.wasm.GetRawstyle()
+}
+
 type Color struct {
 	wasm *wasm.Color
 }

testdata/imagehash.json

@@ -1 +1 @@
-{"testdata/directed/KW91.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4ByYqKSwkJgcBBgA=","testdata/directed/Latin1.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4DnHIDyvgcQ4BBgA=","testdata/directed/NaN.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAAX/ggIGAA==","testdata/directed/abstract.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4EhZPHUnJTQgBBgA=","testdata/directed/alf.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4OBgWNxELBwYBBgA=","testdata/directed/arrows.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4clJyUlJyUlIBBgA=","testdata/directed/awilliams.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4AgIADBg4XFwBBgA=","testdata/directed/biological.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH42NlZOSkpEhIBBgA=","testdata/directed/clust.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4OiYnFxZXVVUBBgA=","testdata/directed/clust1.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4B4uXlaU3lZcBBgA=","testdata/directed/clust2.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4Hj6jqqqqKgMBBgA=","testdata/directed/clust3.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4DjNxcTFhMzMBBgA=","testdata/directed/clust4.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4D1Nzc3FzUw8BBgA=","testdata/directed/clust5.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4BAcnJxNTCQMBBgA=","testdata/directed/crazy.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4DyEx0RsbQw4BBgA=","testdata/directed/ctext.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4bGxsVhYXVRUBBgA=","testdata/directed/dfa.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4Dg4OMjIODg4BBgA=","testdata/directed/fig6.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4ShsXGRuZuW4BBgA=","testdata/directed/fsm.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4GBgYHgTDWxkBBgA=","testdata/directed/grammar.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4GxulJyeVAQIBBgA=","testdata/directed/hashtable.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4HBAYnJgQGJwBBgA=","testdata/directed/honda-tokoro.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4JzPUUklbe2ABBgA=","testdata/directed/japanese.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4HA9JLQcnJw8BBgA=","testdata/directed/jcctree.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4GCwmZ2dtbWUBBgA=","testdata/directed/jsort.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4AwsNVTM3JVEBBgA=","testdata/directed/ldbxtried.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4HxYbLw8HH44BBgA=","testdata/directed/longflat.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4AwQBAWExxTMBBgA=","testdata/directed/mike.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4ASE1xmdmLjwBBgA=","testdata/directed/nhg.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4ExM4bi54HwcBBgA=","testdata/directed/oldarrows.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4Ux8PDw8PB1EBBgA=","testdata/directed/pgram.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4zGwpmqvg4OABBgA=","testdata/directed/pm2way.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4GBgeJgwNBgYBBgA=","testdata/directed/pmpipe.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4BgcLGw8NS08BBgA=","testdata/directed/polypoly.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4LiwsJm5MECsBBgA=","testdata/directed/proc3d.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAAX/ggIGAA==","testdata/directed/psfonttest.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4FlXV1RUVVVUBBgA=","testdata/directed/record2.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4KhgeBpoOmh4BBgA=","testdata/directed/records.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA7/ggH5CUtlfA5ODgEGAA==","testdata/directed/rowe.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4BpI0ZkWmtDEBBgA=","testdata/directed/russian.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4U1tTUtJSEhIBBgA=","testdata/directed/sdh.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4i5uamLSkxEoBBgA=","testdata/directed/shells.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4x42T5aStj80BBgA=","testdata/directed/states.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4BwcFGREozugBBgA=","testdata/directed/structs.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4HCwsbMRGSgABBgA=","testdata/directed/switch.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4O3UbUWslG3MBBgA=","testdata/directed/table.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4DAwOJmbn5sYBBgA=","testdata/directed/train11.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA7/ggH5AQMHCB7kgwEGAA==","testdata/directed/trapeziumlr.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4YHExDw8xcWABBgA=","testdata/directed/tree.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBBgABBEtpbmQBBAAAAA//ggH4BgcTEzEyMLgBBgA=","testdata/directed/triedds.gv":"If+BAwEBAUQB/4IAAQIBBEhhc2gBB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