/// <summary> /// Parses a PathGeometry element. /// </summary> PathGeometry ParsePathGeometry() { Debug.Assert(this.reader.Name == "PathGeometry"); bool isEmptyElement = this.reader.IsEmptyElement; PathGeometry geo = new PathGeometry(); while (MoveToNextAttribute()) { switch (this.reader.Name) { case "Transform": geo.Transform = ParseMatrixTransform(this.reader.Value); break; case "Figures": geo.Figures = ParsePathGeometry(this.reader.Value).Figures; break; case "FillRule": geo.FillRule = ParseEnum<FillRule>(this.reader.Value); break; case "x:Key": geo.Key = this.reader.Value; break; default: UnexpectedAttribute(this.reader.Name); break; } } if (!isEmptyElement) { MoveToNextElement(); while (this.reader.IsStartElement()) { switch (this.reader.Name) { case "PathGeometry.RenderTransform": MoveToNextElement(); geo.Transform = ParseMatrixTransform(); MoveToNextElement(); break; case "PathFigure": geo.Figures.Add(ParsePathFigure()); break; default: Debugger.Break(); break; } } } MoveToNextElement(); return geo; }
/// <summary> /// Writes the specified PathGeometry to the content stream. /// </summary> internal void WriteGeometry(PathGeometry geo) { BeginGraphic(); foreach (PathFigure figure in geo.Figures) { PolyLineSegment pseg; PolyBezierSegment bseg; ArcSegment aseg; PolyQuadraticBezierSegment qseg; // And now for the most superfluous and unnecessary optimization within the whole PDFsharp library if (figure.IsClosed && figure.Segments.Count == 1 && (pseg = figure.Segments[0] as PolyLineSegment) != null && pseg.Points.Count == 3) { // Identify rectangles Point pt0 = figure.StartPoint; Point pt1 = pseg.Points[0]; Point pt2 = pseg.Points[1]; Point pt3 = pseg.Points[2]; // This // M16,0 L24,0 24,144 16,144 Z // becomes // 16 0 m 24 0 l 24 144 l 16 144 l h // but shorter is this // 16 0 8 144 re if (pt0.X == pt3.X && pt0.Y == pt1.Y && pt1.X == pt2.X && pt2.Y == pt3.Y) { WriteLiteral("{0:0.###} {1:0.###} {2:0.###} {3:0.###} re \n", pt0.X, pt0.Y, pt2.X - pt0.X, pt2.Y - pt1.Y); continue; } } WriteMoveStart(figure.StartPoint); foreach (PathSegment seg in figure.Segments) { if ((pseg = seg as PolyLineSegment) != null) WriteSegment(pseg); else if ((bseg = seg as PolyBezierSegment) != null) WriteSegment(bseg); else if ((aseg = seg as ArcSegment) != null) WriteSegment(aseg); else if ((qseg = seg as PolyQuadraticBezierSegment) != null) WriteSegment(qseg); } if (figure.IsClosed) WriteLiteral("h\n"); // Close current figure } }
/// <summary> /// Writes the specified PathGeometry as intersection with the current clip path to the content stream. /// </summary> public void WriteClip(PathGeometry geo) { BeginGraphic(); WriteGeometry(geo); if (geo.FillRule == FillRule.NonZero) WriteLiteral("W n\n"); else WriteLiteral("W* n\n"); }
/// <summary> /// Builds a PdfFormXObject from the specified brush. /// // If a gradient contains transparency, a soft mask is created an added to the specified graphic state. /// </summary> PdfFormXObject BuildForm(RadialGradientBrush brush, PathGeometry geometry) { PdfFormXObject pdfForm = Context.PdfDocument.Internals.CreateIndirectObject<PdfFormXObject>(); // HACK pdfForm.Elements.SetRectangle(PdfFormXObject.Keys.BBox, new PdfRectangle(0, 640, 480, 0)); // Transparency group of the form //<< // /I true // /K false // /S /Transparency // /Type /Group //>> PdfTransparencyGroupAttributes tgPrimaryForm = Context.PdfDocument.Internals.CreateIndirectObject<PdfTransparencyGroupAttributes>(); // not set by Acrobat: tgAttributes.Elements.SetName(PdfTransparencyGroupAttributes.Keys.CS, "/DeviceRGB"); tgPrimaryForm.Elements.SetBoolean(PdfTransparencyGroupAttributes.Keys.I, true); tgPrimaryForm.Elements.SetBoolean(PdfTransparencyGroupAttributes.Keys.K, false); pdfForm.Elements.SetReference(PdfFormXObject.Keys.Group, tgPrimaryForm); // Shading PdfShading shading = BuildShading(brush, 1, 1); // ExtGState //<< // /AIS false // /BM /Normal // /ca 1 // /CA 1 // /op false // /OP false // /OPM 1 // /SA true // /SMask 22 0 R // /Type /ExtGState //>> PdfExtGState pdfExtGState = Context.PdfDocument.Internals.CreateIndirectObject<PdfExtGState>(); pdfExtGState.SetDefault1(); // Soft mask PdfSoftMask softmask = BuildSoftMask(brush); pdfExtGState.Elements.SetReference(PdfExtGState.Keys.SMask, softmask); // PdfFormXObject //<< // /BBox [200.118 369.142 582.795 -141.094] // /Group 11 0 R // /Length 117 // /Matrix [1 0 0 1 0 0] // /Resources // << // /ColorSpace // << // /CS0 8 0 R // >> // /ExtGState // << // /GS0 23 0 R // >> // /Shading // << // /Sh0 14 0 R // >> // >> // /Subtype /Form //>> //stream //q //203.868 365.392 157.5 -97.5 re //W* n //q //0 g //1 i ///GS0 gs //0.75 0 0 -0.75 200.1181183 369.1417236 cm //BX /Sh0 sh EX Q //Q //endstream PdfContentWriter writer = new PdfContentWriter(Context, pdfForm); writer.BeginContentRaw(); // Acrobat 8 clips to bounding box, so we should do writer.WriteClip(geometry); //writer.WriteGraphicsState(extGState); //writer.WriteLiteral("0 g\n"); writer.WriteLiteral(writer.Resources.AddExtGState(pdfExtGState) + " gs\n"); XMatrix transform = new XMatrix(); //(brush.Viewport.Width / viewBoxForm.width, 0, 0, brush.Viewport.Height / viewBoxForm.height, 0, 0); writer.WriteMatrix(transform); writer.WriteLiteral("BX " + writer.Resources.AddShading(shading) + " sh EX\n"); writer.EndContent(); return pdfForm; }
/// <summary> /// Parses a PathGeometry from a data string element. /// </summary> PathGeometry ParsePathGeometry(string data) { #if DEBUG_ // XPS = M 20,100 C 45,50 70,150 95,100 S 145,150 170,100 220,150 245,100 C 220,50 195,150 170,100 S 120,150 95,100 45,150 20,100 // XXX = M20,100C45,50 70,150 95,100 120,50 145,150 170,100 195,50 220,150 245,100 220,50 195,150 170,100 145,50 120,150 95,100 70,50 45,150 20,100 if (data.StartsWith("M 20,100 C 45,50 70,150 95,100 S 145,")) Debugger.Break(); #endif PathGeometry geo = TryParseStaticResource<PathGeometry>(data); if (geo != null) return geo; data = FixHack(data); // From the algorithm on page 365 in XPS 1.0 specs // See Petzold page 813 geo = new PathGeometry(); Point point = new Point(); PathFigure figure = null; TokenizerHelper helper = new TokenizerHelper(data); helper.NextTokenRequired(); do { string token = helper.GetCurrentToken(); switch (token[0]) { // FillRule case 'F': geo.FillRule = helper.NextTokenRequired() == "1" ? FillRule.NonZero : FillRule.EvenOdd; break; // Move case 'M': { figure = new PathFigure(); geo.Figures.Add(figure); point = new Point(ParseDouble(helper.NextTokenRequired()), ParseDouble(helper.NextTokenRequired())); figure.StartPoint = point; } break; // Move case 'm': { figure = new PathFigure(); geo.Figures.Add(figure); point = new Point(point.X + ParseDouble(helper.NextTokenRequired()), point.Y + ParseDouble(helper.NextTokenRequired())); figure.StartPoint = point; } break; // Line case 'L': { PolyLineSegment seg; int segCount = figure.Segments.Count; if (segCount > 0 && (seg = figure.Segments[segCount - 1] as PolyLineSegment) != null) { } else { seg = new PolyLineSegment(); figure.Segments.Add(seg); } do { point = new Point(ParseDouble(helper.NextTokenRequired()), ParseDouble(helper.NextTokenRequired())); seg.Points.Add(point); } while (!Char.IsLetter(helper.PeekNextCharacter())); } break; // Line case 'l': { PolyLineSegment seg; int segCount = figure.Segments.Count; if (segCount > 0 && (seg = figure.Segments[segCount - 1] as PolyLineSegment) != null) { } else { seg = new PolyLineSegment(); figure.Segments.Add(seg); } do { point = new Point(ParseDouble(helper.NextTokenRequired()), ParseDouble(helper.NextTokenRequired())); seg.Points.Add(point); } while (!Char.IsLetter(helper.PeekNextCharacter())); } break; // Horizontal Line case 'H': { PolyLineSegment seg; int segCount = figure.Segments.Count; if (segCount > 0 && (seg = figure.Segments[segCount - 1] as PolyLineSegment) != null) { } else { seg = new PolyLineSegment(); figure.Segments.Add(seg); } do { point.X = ParseDouble(helper.NextTokenRequired()); seg.Points.Add(point); } while (!Char.IsLetter(helper.PeekNextCharacter())); } break; // Horizontal Line case 'h': { PolyLineSegment seg; int segCount = figure.Segments.Count; if (segCount > 0 && (seg = figure.Segments[segCount - 1] as PolyLineSegment) != null) { } else { seg = new PolyLineSegment(); figure.Segments.Add(seg); } do { point.X += ParseDouble(helper.NextTokenRequired()); seg.Points.Add(point); } while (!Char.IsLetter(helper.PeekNextCharacter())); } break; // Vertical Line case 'V': { PolyLineSegment seg; int segCount = figure.Segments.Count; if (segCount > 0 && (seg = figure.Segments[segCount - 1] as PolyLineSegment) != null) { } else { seg = new PolyLineSegment(); figure.Segments.Add(seg); } do { point.Y = ParseDouble(helper.NextTokenRequired()); seg.Points.Add(point); } while (!Char.IsLetter(helper.PeekNextCharacter())); } break; // Vertical Line case 'v': { PolyLineSegment seg; int segCount = figure.Segments.Count; if (segCount > 0 && (seg = figure.Segments[segCount - 1] as PolyLineSegment) != null) { } else { seg = new PolyLineSegment(); figure.Segments.Add(seg); } do { point.Y += ParseDouble(helper.NextTokenRequired()); seg.Points.Add(point); } while (!Char.IsLetter(helper.PeekNextCharacter())); } break; // Elliptical Arc case 'A': do { // I cannot believe it: "A70.1,50.1 1,34 0 0 170.1,30.1" // The rotation angle "1,34" uses a ',' instead of a '.' in my German Windows Vista! //A70.1,50.1 1,34 0 0 170.1,30.1 ArcSegment seg = new ArcSegment(); figure.Segments.Add(seg); seg.Size = new Size(ParseDouble(helper.NextTokenRequired()), ParseDouble(helper.NextTokenRequired())); seg.RotationAngle = ParseDouble(helper.NextTokenRequired()); seg.IsLargeArc = helper.NextTokenRequired() == "1"; seg.SweepDirection = helper.NextTokenRequired() == "1" ? SweepDirection.Clockwise : SweepDirection.Counterclockwise; point = new Point(ParseDouble(helper.NextTokenRequired()), ParseDouble(helper.NextTokenRequired())); seg.Point = point; } while (!Char.IsLetter(helper.PeekNextCharacter())); break; // Elliptical Arc case 'a': do { ArcSegment seg = new ArcSegment(); figure.Segments.Add(seg); seg.Size = new Size(ParseDouble(helper.NextTokenRequired()), ParseDouble(helper.NextTokenRequired())); seg.RotationAngle = ParseDouble(helper.NextTokenRequired()); seg.IsLargeArc = helper.NextTokenRequired() == "1"; seg.SweepDirection = helper.NextTokenRequired() == "1" ? SweepDirection.Clockwise : SweepDirection.Counterclockwise; point = new Point(point.X + ParseDouble(helper.NextTokenRequired()), point.Y + ParseDouble(helper.NextTokenRequired())); seg.Point = point; } while (!Char.IsLetter(helper.PeekNextCharacter())); break; // Cubic Bézier Curve case 'C': { PolyBezierSegment seg; int segCount = figure.Segments.Count; if (segCount > 0 && (seg = figure.Segments[segCount - 1] as PolyBezierSegment) != null) { } else { seg = new PolyBezierSegment(); figure.Segments.Add(seg); } do { seg.Points.Add(new Point(ParseDouble(helper.NextTokenRequired()), ParseDouble(helper.NextTokenRequired()))); seg.Points.Add(new Point(ParseDouble(helper.NextTokenRequired()), ParseDouble(helper.NextTokenRequired()))); point = new Point(ParseDouble(helper.NextTokenRequired()), ParseDouble(helper.NextTokenRequired())); seg.Points.Add(point); } while (!Char.IsLetter(helper.PeekNextCharacter())); } break; // Cubic Bézier Curve case 'c': { PolyBezierSegment seg; int segCount = figure.Segments.Count; if (segCount > 0 && (seg = figure.Segments[segCount - 1] as PolyBezierSegment) != null) { } else { seg = new PolyBezierSegment(); figure.Segments.Add(seg); } do { seg.Points.Add(new Point(point.X + ParseDouble(helper.NextTokenRequired()), point.Y + ParseDouble(helper.NextTokenRequired()))); seg.Points.Add(new Point(point.X + ParseDouble(helper.NextTokenRequired()), point.Y + ParseDouble(helper.NextTokenRequired()))); point = new Point(point.X + ParseDouble(helper.NextTokenRequired()), point.Y + ParseDouble(helper.NextTokenRequired())); seg.Points.Add(point); } while (!Char.IsLetter(helper.PeekNextCharacter())); } break; // Smooth Cubic Bézier Curve case 'S': { PolyBezierSegment seg; int segCount = figure.Segments.Count; if (segCount > 0 && (seg = figure.Segments[segCount - 1] as PolyBezierSegment) != null) { } else { seg = new PolyBezierSegment(); figure.Segments.Add(seg); } do { Point pt = new Point(); int count = seg.Points.Count; segCount = figure.Segments.Count; if (count > 0) { Point lastCtrlPoint = seg.Points[count - 2]; pt.X = 2 * point.X - lastCtrlPoint.X; pt.Y = 2 * point.Y - lastCtrlPoint.Y; } else if (segCount > 1 && figure.Segments[count - 2] is PolyBezierSegment) { PolyBezierSegment lastSeg = (PolyBezierSegment)figure.Segments[count - 2]; count = lastSeg.Points.Count; Point lastCtrlPoint = lastSeg.Points[count - 2]; pt.X = 2 * point.X - lastCtrlPoint.X; pt.Y = 2 * point.Y - lastCtrlPoint.Y; } else { pt = point; } seg.Points.Add(pt); seg.Points.Add(new Point(ParseDouble(helper.NextTokenRequired()), ParseDouble(helper.NextTokenRequired()))); point = new Point(ParseDouble(helper.NextTokenRequired()), ParseDouble(helper.NextTokenRequired())); seg.Points.Add(point); } while (!Char.IsLetter(helper.PeekNextCharacter())); } break; // Smooth Cubic Bézier Curve case 's': { PolyBezierSegment seg; int segCount = figure.Segments.Count; if (segCount > 0 && (seg = figure.Segments[segCount - 1] as PolyBezierSegment) != null) { } else { seg = new PolyBezierSegment(); figure.Segments.Add(seg); } do { Point pt = new Point(); int count = seg.Points.Count; segCount = figure.Segments.Count; if (count > 0) { Point lastCtrlPoint = seg.Points[count - 2]; pt.X = 2 * point.X - lastCtrlPoint.X; pt.Y = 2 * point.Y - lastCtrlPoint.Y; } else if (segCount > 1 && figure.Segments[count - 2] is PolyBezierSegment) { PolyBezierSegment lastSeg = (PolyBezierSegment)figure.Segments[count - 2]; count = lastSeg.Points.Count; Point lastCtrlPoint = lastSeg.Points[count - 2]; pt.X = 2 * point.X - lastCtrlPoint.X; pt.Y = 2 * point.Y - lastCtrlPoint.Y; } else { pt = point; } seg.Points.Add(pt); seg.Points.Add(new Point(point.X + ParseDouble(helper.NextTokenRequired()), point.Y + ParseDouble(helper.NextTokenRequired()))); point = new Point(point.X + ParseDouble(helper.NextTokenRequired()), point.Y + ParseDouble(helper.NextTokenRequired())); seg.Points.Add(point); } while (!Char.IsLetter(helper.PeekNextCharacter())); } break; // Quadratic Bézier Curve case 'Q': { PolyQuadraticBezierSegment seg = new PolyQuadraticBezierSegment(); figure.Segments.Add(seg); do { seg.Points.Add(new Point(ParseDouble(helper.NextTokenRequired()), ParseDouble(helper.NextTokenRequired()))); point = new Point(ParseDouble(helper.NextTokenRequired()), ParseDouble(helper.NextTokenRequired())); seg.Points.Add(point); } while (!Char.IsLetter(helper.PeekNextCharacter())); } break; // Quadratic Bézier Curve case 'q': { PolyQuadraticBezierSegment seg = new PolyQuadraticBezierSegment(); figure.Segments.Add(seg); do { seg.Points.Add(new Point(point.X + ParseDouble(helper.NextTokenRequired()), point.Y + ParseDouble(helper.NextTokenRequired()))); point = new Point(point.X + ParseDouble(helper.NextTokenRequired()), point.Y + ParseDouble(helper.NextTokenRequired())); seg.Points.Add(point); } while (!Char.IsLetter(helper.PeekNextCharacter())); } break; // Close case 'Z': case 'z': { figure.IsClosed = true; if (figure.Segments.Count > 0) { PathSegment seg = figure.Segments[0]; } point = figure.StartPoint; figure = null; } break; default: Debug.Assert(false); break; } } while (helper.NextToken()); return geo; }
/// <summary> /// Builds a form XObject from a linear gradient brush that uses transparency. /// </summary> public static PdfFormXObject BuildFormFromLinearGradientBrush(DocumentRenderingContext context, LinearGradientBrush brush, PathGeometry geometry) { LinearShadingBuilder builder = new LinearShadingBuilder(context); PdfFormXObject pdfForm = builder.BuildForm(brush, geometry); return pdfForm; }