Update PathGeometryConverter.cs
This commit is contained in:
Wiesław Šoltés
Родитель
69007d4f3c
Коммит
5bb6949412
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@ -1,7 +1,6 @@
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#nullable enable
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using System;
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using Core2D.Model.Path;
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using Core2D.ViewModels.Path;
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using Core2D.ViewModels.Path.Segments;
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using Core2D.ViewModels.Shapes;
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using PDF = PdfSharp.Drawing;
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@ -10,22 +9,93 @@ namespace Core2D.Modules.Renderer.PdfSharp;
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public static class PathGeometryConverter
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{
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public static PDF.XGraphicsPath ToXGraphicsPath(this PathShapeViewModel pg, Func<double, double> scale)
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public static PDF.XGraphicsPath? ToXGraphicsPath(this PathShapeViewModel pathShape, Func<double, double> scale)
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{
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var gp = new PDF.XGraphicsPath()
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var graphicsPath = new PDF.XGraphicsPath
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{
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FillMode = pg.FillRule == FillRule.EvenOdd ? PDF.XFillMode.Alternate : PDF.XFillMode.Winding
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FillMode = pathShape.FillRule == FillRule.EvenOdd ? PDF.XFillMode.Alternate : PDF.XFillMode.Winding
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};
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foreach (var pf in pg.Figures)
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foreach (var figure in pathShape.Figures)
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{
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var startPoint = pf.StartPoint;
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foreach (var segment in pf.Segments)
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if (figure.StartPoint is null)
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{
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if (segment is ArcSegmentViewModel arcSegment)
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return null;
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}
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var startPoint = figure.StartPoint;
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foreach (var segment in figure.Segments)
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{
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switch (segment)
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{
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#if WPF
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case LineSegmentViewModel lineSegment:
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{
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if (lineSegment.Point is null)
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{
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return null;
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}
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graphicsPath.AddLine(
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scale(startPoint.X),
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scale(startPoint.Y),
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scale(lineSegment.Point.X),
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scale(lineSegment.Point.Y));
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startPoint = lineSegment.Point;
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break;
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}
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case CubicBezierSegmentViewModel cubicBezierSegment:
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{
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if (cubicBezierSegment.Point1 is null || cubicBezierSegment.Point2 is null || cubicBezierSegment.Point3 is null)
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{
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return null;
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}
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graphicsPath.AddBezier(
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scale(startPoint.X),
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scale(startPoint.Y),
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scale(cubicBezierSegment.Point1.X),
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scale(cubicBezierSegment.Point1.Y),
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scale(cubicBezierSegment.Point2.X),
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scale(cubicBezierSegment.Point2.Y),
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scale(cubicBezierSegment.Point3.X),
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scale(cubicBezierSegment.Point3.Y));
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startPoint = cubicBezierSegment.Point3;
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break;
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}
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case QuadraticBezierSegmentViewModel quadraticBezierSegment:
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{
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if (quadraticBezierSegment.Point1 is null || quadraticBezierSegment.Point2 is null)
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{
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return null;
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}
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var p1 = startPoint;
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var p2 = quadraticBezierSegment.Point1;
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var p3 = quadraticBezierSegment.Point2;
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var x1 = p1.X;
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var y1 = p1.Y;
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var x2 = p1.X + (2.0 * (p2.X - p1.X)) / 3.0;
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var y2 = p1.Y + (2.0 * (p2.Y - p1.Y)) / 3.0;
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var x3 = x2 + (p3.X - p1.X) / 3.0;
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var y3 = y2 + (p3.Y - p1.Y) / 3.0;
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var x4 = p3.X;
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var y4 = p3.Y;
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graphicsPath.AddBezier(
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scale(x1),
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scale(y1),
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scale(x2),
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scale(y2),
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scale(x3),
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scale(y3),
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scale(x4),
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scale(y4));
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startPoint = quadraticBezierSegment.Point2;
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break;
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}
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case ArcSegmentViewModel arcSegment:
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{
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if (arcSegment.Point is null || arcSegment.Size is null)
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{
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return null;
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}
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var point1 = new PDF.XPoint(
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scale(startPoint.X),
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scale(startPoint.Y));
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@ -35,80 +105,29 @@ public static class PathGeometryConverter
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var size = new PDF.XSize(
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scale(arcSegment.Size.Width),
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scale(arcSegment.Size.Height));
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gp.AddArc(
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graphicsPath.AddArc(
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point1,
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point2,
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size, arcSegment.RotationAngle, arcSegment.IsLargeArc,
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arcSegment.SweepDirection == SweepDirection.Clockwise ? PDF.XSweepDirection.Clockwise : PDF.XSweepDirection.Counterclockwise);
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startPoint = arcSegment.Point;
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#else
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// TODO: Convert WPF/SVG elliptical arc segment format to GDI+ bezier curves.
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startPoint = arcSegment.Point;
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#endif
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}
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else if (segment is CubicBezierSegmentViewModel cubicBezierSegment)
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{
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gp.AddBezier(
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scale(startPoint.X),
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scale(startPoint.Y),
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scale(cubicBezierSegment.Point1.X),
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scale(cubicBezierSegment.Point1.Y),
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scale(cubicBezierSegment.Point2.X),
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scale(cubicBezierSegment.Point2.Y),
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scale(cubicBezierSegment.Point3.X),
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scale(cubicBezierSegment.Point3.Y));
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startPoint = cubicBezierSegment.Point3;
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}
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else if (segment is LineSegmentViewModel)
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{
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var lineSegment = segment as LineSegmentViewModel;
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gp.AddLine(
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scale(startPoint.X),
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scale(startPoint.Y),
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scale(lineSegment.Point.X),
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scale(lineSegment.Point.Y));
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startPoint = lineSegment.Point;
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}
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else if (segment is QuadraticBezierSegmentViewModel quadraticBezierSegment)
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{
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var p1 = startPoint;
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var p2 = quadraticBezierSegment.Point1;
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var p3 = quadraticBezierSegment.Point2;
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double x1 = p1.X;
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double y1 = p1.Y;
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double x2 = p1.X + (2.0 * (p2.X - p1.X)) / 3.0;
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double y2 = p1.Y + (2.0 * (p2.Y - p1.Y)) / 3.0;
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double x3 = x2 + (p3.X - p1.X) / 3.0;
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double y3 = y2 + (p3.Y - p1.Y) / 3.0;
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double x4 = p3.X;
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double y4 = p3.Y;
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gp.AddBezier(
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scale(x1),
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scale(y1),
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scale(x2),
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scale(y2),
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scale(x3),
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scale(y3),
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scale(x4),
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scale(y4));
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startPoint = quadraticBezierSegment.Point2;
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}
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else
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{
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throw new NotSupportedException("Not supported segment type: " + segment.GetType());
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break;
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}
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default:
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throw new NotSupportedException("Not supported segment type: " + segment.GetType());
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}
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}
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if (pf.IsClosed)
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if (figure.IsClosed)
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{
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gp.CloseFigure();
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graphicsPath.CloseFigure();
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}
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else
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{
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gp.StartFigure();
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graphicsPath.StartFigure();
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}
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}
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return gp;
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return graphicsPath;
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}
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}
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