public static GraphicsPath CreatePath(SvgPathElement element)
{
GraphicsPath gp = new GraphicsPath();
SvgPointF initPoint = new SvgPointF(0, 0);
SvgPointF lastPoint = new SvgPointF(0, 0);
SvgPointF ptXY = new SvgPointF(0, 0);
SvgPathSeg segment = null;
SvgPathSegMoveto pathMoveTo = null;
SvgPathSegLineto pathLineTo = null;
SvgPathSegCurveto pathCurveTo = null;
SvgPathSegArc pathArc = null;
SvgPathSegList segments = element.PathSegList;
int nElems = segments.NumberOfItems;
for (int i = 0; i < nElems; i++)
{
segment = segments.GetItem(i);
switch (segment.PathType)
{
case SvgPathType.MoveTo: //if (DynamicCast.Cast(segment, out pathMoveTo))
pathMoveTo = (SvgPathSegMoveto)segment;
gp.StartFigure();
lastPoint = initPoint = pathMoveTo.AbsXY;
break;
case SvgPathType.LineTo: //else if (DynamicCast.Cast(segment, out pathLineTo))
pathLineTo = (SvgPathSegLineto)segment;
ptXY = pathLineTo.AbsXY;
gp.AddLine(lastPoint.X, lastPoint.Y, ptXY.X, ptXY.Y);
lastPoint = ptXY;
break;
case SvgPathType.CurveTo: //else if (DynamicCast.Cast(segment, out pathCurveTo))
pathCurveTo = (SvgPathSegCurveto)segment;
SvgPointF xy = pathCurveTo.AbsXY;
SvgPointF x1y1 = pathCurveTo.CubicX1Y1;
SvgPointF x2y2 = pathCurveTo.CubicX2Y2;
gp.AddBezier(lastPoint.X, lastPoint.Y, x1y1.X, x1y1.Y, x2y2.X, x2y2.Y, xy.X, xy.Y);
lastPoint = xy;
break;
case SvgPathType.ArcTo: //else if (DynamicCast.Cast(segment, out pathArc))
pathArc = (SvgPathSegArc)segment;
ptXY = pathArc.AbsXY;
if (lastPoint.Equals(ptXY))
{
// If the endpoints (x, y) and (x0, y0) are identical, then this
// is equivalent to omitting the elliptical arc segment entirely.
}
else if (pathArc.R1.Equals(0) || pathArc.R2.Equals(0))
{
// Ensure radii are valid
gp.AddLine(lastPoint.X, lastPoint.Y, ptXY.X, ptXY.Y);
}
else
{
CalculatedArcValues calcValues = pathArc.GetCalculatedArcValues();
GraphicsPath subPath = new GraphicsPath();
subPath.StartFigure();
subPath.AddArc((float)(calcValues.Cx - calcValues.CorrRx),
(float)(calcValues.Cy - calcValues.CorrRy),
(float)calcValues.CorrRx * 2, (float)calcValues.CorrRy * 2,
(float)calcValues.AngleStart, (float)calcValues.AngleExtent);
Matrix matrix = new Matrix();
matrix.Translate(-(float)calcValues.Cx, -(float)calcValues.Cy);
subPath.Transform(matrix);
matrix = new Matrix();
matrix.Rotate((float)pathArc.Angle);
subPath.Transform(matrix);
matrix = new Matrix();
matrix.Translate((float)calcValues.Cx, (float)calcValues.Cy);
subPath.Transform(matrix);
gp.AddPath(subPath, true);
}
lastPoint = ptXY;
break;
case SvgPathType.Close: //else if (segment is SvgPathSegClosePath)
gp.CloseFigure();
lastPoint = initPoint;
break;
}
}
string fillRule = element.GetPropertyValue("fill-rule");
if (fillRule == "evenodd")
{
gp.FillMode = FillMode.Alternate;
}
else
{
gp.FillMode = FillMode.Winding;
}
return(gp);
}
public Geometry CreateGeometry(SvgPathElement element)
{
PathGeometry geometry = new PathGeometry();
var comparer = StringComparison.OrdinalIgnoreCase;
string fillRule = element.GetPropertyValue("fill-rule");
string clipRule = element.GetAttribute("clip-rule");
if (!string.IsNullOrWhiteSpace(clipRule) && string.Equals(clipRule, "evenodd", comparer) ||
string.Equals(clipRule, CssConstants.ValNonzero, comparer))
{
fillRule = clipRule;
}
if (string.Equals(fillRule, "evenodd", comparer))
{
geometry.FillRule = FillRule.EvenOdd;
}
else if (string.Equals(fillRule, CssConstants.ValNonzero, comparer))
{
geometry.FillRule = FillRule.Nonzero;
}
SvgPointF initPoint = new SvgPointF(0, 0);
SvgPointF lastPoint = new SvgPointF(0, 0);
SvgPointF ptXY = new SvgPointF(0, 0);
SvgPathSeg segment = null;
SvgPathSegMoveto pathMoveTo = null;
SvgPathSegLineto pathLineTo = null;
SvgPathSegCurveto pathCurveTo = null;
SvgPathSegArc pathArc = null;
SvgPathSegList segments = element.PathSegList;
int numSegs = segments.NumberOfItems;
if (numSegs == 0)
{
return(geometry);
}
PathFigure pathFigure = null;
for (int i = 0; i < numSegs; i++)
{
segment = segments.GetItem(i);
switch (segment.PathType)
{
case SvgPathType.MoveTo: //if (DynamicCast.Cast(segment, out pathMoveTo))
pathMoveTo = (SvgPathSegMoveto)segment;
if (pathFigure != null)
{
pathFigure.IsClosed = false;
pathFigure.IsFilled = true;
geometry.Figures.Add(pathFigure);
pathFigure = null;
}
lastPoint = initPoint = pathMoveTo.AbsXY;
pathFigure = new PathFigure();
pathFigure.StartPoint = new Point(initPoint.ValueX, initPoint.ValueY);
break;
case SvgPathType.LineTo: //else if (DynamicCast.Cast(segment, out pathLineTo))
pathLineTo = (SvgPathSegLineto)segment;
ptXY = pathLineTo.AbsXY;
pathFigure.Segments.Add(new LineSegment(new Point(ptXY.ValueX, ptXY.ValueY), true));
lastPoint = ptXY;
break;
case SvgPathType.CurveTo: //else if (DynamicCast.Cast(segment, out pathCurveTo))
pathCurveTo = (SvgPathSegCurveto)segment;
SvgPointF xy = pathCurveTo.AbsXY;
SvgPointF x1y1 = pathCurveTo.CubicX1Y1;
SvgPointF x2y2 = pathCurveTo.CubicX2Y2;
pathFigure.Segments.Add(new BezierSegment(new Point(x1y1.ValueX, x1y1.ValueY),
new Point(x2y2.ValueX, x2y2.ValueY), new Point(xy.ValueX, xy.ValueY), true));
lastPoint = xy;
break;
case SvgPathType.ArcTo: //else if (DynamicCast.Cast(segment, out pathArc))
pathArc = (SvgPathSegArc)segment;
ptXY = pathArc.AbsXY;
if (lastPoint.Equals(ptXY))
{
// If the endpoints (x, y) and (x0, y0) are identical, then this
// is equivalent to omitting the elliptical arc segment entirely.
}
else if (pathArc.R1.Equals(0) || pathArc.R2.Equals(0))
{
// Ensure radii are valid
pathFigure.Segments.Add(new LineSegment(new Point(ptXY.ValueX, ptXY.ValueY), true));
}
else
{
CalculatedArcValues calcValues = pathArc.GetCalculatedArcValues();
pathFigure.Segments.Add(new ArcSegment(new Point(ptXY.ValueX, ptXY.ValueY),
new Size(pathArc.R1, pathArc.R2), pathArc.Angle, pathArc.LargeArcFlag,
pathArc.SweepFlag ? SweepDirection.Clockwise : SweepDirection.Counterclockwise,
true));
}
lastPoint = ptXY;
break;
case SvgPathType.Close: //else if (segment is SvgPathSegClosePath)
if (pathFigure != null)
{
pathFigure.IsClosed = true;
pathFigure.IsFilled = true;
geometry.Figures.Add(pathFigure);
pathFigure = null;
}
lastPoint = initPoint;
break;
}
}
if (pathFigure != null)
{
pathFigure.IsClosed = false;
pathFigure.IsFilled = true;
geometry.Figures.Add(pathFigure);
}
return(geometry);
}