private static void appendPath(PdfCanvas target, PdfPath path)
{
foreach (PdfSubpath subpath in path.Subpaths)
{
foreach (PdfPathSegment segment in subpath.Segments)
{
switch (segment.Type)
{
case PdfPathSegmentType.Point:
target.CurrentPosition = ((PdfPointSegment)segment).Value;
break;
case PdfPathSegmentType.Line:
PdfLineSegment line = (PdfLineSegment)segment;
target.CurrentPosition = line.Start;
target.AppendLineTo(line.End);
break;
case PdfPathSegmentType.Bezier:
PdfBezierSegment bezier = (PdfBezierSegment)segment;
target.CurrentPosition = bezier.Start;
target.AppendCurveTo(bezier.FirstControl, bezier.SecondControl, bezier.End);
break;
case PdfPathSegmentType.Rectangle:
target.AppendRectangle(((PdfRectangleSegment)segment).Bounds);
break;
case PdfPathSegmentType.CloseSubpath:
target.ClosePath();
break;
}
}
}
}
private static void toGdiPath(PdfPath path, GraphicsPath gdiPath)
{
foreach (PdfSubpath subpath in path.Subpaths)
{
gdiPath.StartFigure();
foreach (PdfPathSegment segment in subpath.Segments)
{
switch (segment.Type)
{
case PdfPathSegmentType.Point:
// A singlepoint open subpath produces no output.
break;
case PdfPathSegmentType.Line:
PdfLineSegment line = (PdfLineSegment)segment;
gdiPath.AddLine(line.Start.ToPointF(), line.End.ToPointF());
break;
case PdfPathSegmentType.Bezier:
PdfBezierSegment bezier = (PdfBezierSegment)segment;
gdiPath.AddBezier(bezier.Start.ToPointF(),
bezier.FirstControl.ToPointF(),
bezier.SecondControl.ToPointF(),
bezier.End.ToPointF()
);
break;
case PdfPathSegmentType.Rectangle:
RectangleF rect = ((PdfRectangleSegment)segment).Bounds.ToRectangleF();
// GDI+ does not render rectangles with negative or very small width and height. Render such
// rectangles by lines, but respect direction. Otherwise non-zero winding rule for
// path filling will not work.
gdiPath.AddLines(new PointF[]
{
rect.Location,
new PointF(rect.X + rect.Width, rect.Y),
new PointF(rect.X + rect.Width, rect.Y + rect.Height),
new PointF(rect.X, rect.Y + rect.Height),
rect.Location
});
break;
case PdfPathSegmentType.CloseSubpath:
gdiPath.CloseFigure();
break;
}
}
}
}
