void AddPolyBezier(PathF path, PolyBezierSegment polyBezierSegment)
{
for (int bez = 0; bez < polyBezierSegment.Points.Count; bez += 3)
{
if (bez + 2 > polyBezierSegment.Points.Count - 1)
{
break;
}
var pt1 = new PointF((float)(polyBezierSegment.Points[bez].X), (float)(polyBezierSegment.Points[bez].Y));
var pt2 = new PointF((float)(polyBezierSegment.Points[bez + 1].X), (float)(polyBezierSegment.Points[bez + 1].Y));
var pt3 = new PointF((float)(polyBezierSegment.Points[bez + 2].X), (float)(polyBezierSegment.Points[bez + 2].Y));
path.CurveTo(pt1, pt2, pt3);
}
}
/// <include file="../../../docs/Microsoft.Maui.Controls.Shapes/GeometryHelper.xml" path="//Member[@MemberName='FlattenGeometry'][1]/Docs" />
public static void FlattenGeometry(PathGeometry pathGeoDst, Geometry geoSrc, double tolerance, Matrix matxPrevious)
{
Matrix matx = matxPrevious;
if (geoSrc is GeometryGroup)
{
foreach (Geometry geoChild in (geoSrc as GeometryGroup).Children)
{
FlattenGeometry(pathGeoDst, geoChild, tolerance, matx);
}
}
else if (geoSrc is LineGeometry)
{
LineGeometry lineGeoSrc = geoSrc as LineGeometry;
PathFigure figDst = new PathFigure();
PolyLineSegment segDst = new PolyLineSegment();
figDst.StartPoint = matx.Transform(lineGeoSrc.StartPoint);
segDst.Points.Add(matx.Transform(lineGeoSrc.EndPoint));
figDst.Segments.Add(segDst);
pathGeoDst.Figures.Add(figDst);
}
else if (geoSrc is RectangleGeometry)
{
RectangleGeometry rectGeoSrc = geoSrc as RectangleGeometry;
PathFigure figDst = new PathFigure();
PolyLineSegment segDst = new PolyLineSegment();
figDst.StartPoint = matx.Transform(new Point(rectGeoSrc.Rect.Left, rectGeoSrc.Rect.Top));
segDst.Points.Add(matx.Transform(new Point(rectGeoSrc.Rect.Right, rectGeoSrc.Rect.Top)));
segDst.Points.Add(matx.Transform(new Point(rectGeoSrc.Rect.Right, rectGeoSrc.Rect.Bottom)));
segDst.Points.Add(matx.Transform(new Point(rectGeoSrc.Rect.Left, rectGeoSrc.Rect.Bottom)));
segDst.Points.Add(matx.Transform(new Point(rectGeoSrc.Rect.Left, rectGeoSrc.Rect.Top)));
figDst.IsClosed = true;
figDst.Segments.Add(segDst);
pathGeoDst.Figures.Add(figDst);
}
else if (geoSrc is EllipseGeometry)
{
EllipseGeometry elipGeoSrc = geoSrc as EllipseGeometry;
PathFigure figDst = new PathFigure();
PolyLineSegment segDst = new PolyLineSegment();
int max = (int)(4 * (elipGeoSrc.RadiusX + elipGeoSrc.RadiusY) / tolerance);
for (int i = 0; i < max; i++)
{
double x = elipGeoSrc.Center.X + elipGeoSrc.RadiusX * Math.Sin(i * 2 * Math.PI / max);
double y = elipGeoSrc.Center.Y - elipGeoSrc.RadiusY * Math.Cos(i * 2 * Math.PI / max);
Point pt = matx.Transform(new Point(x, y));
if (i == 0)
{
figDst.StartPoint = pt;
}
else
{
segDst.Points.Add(pt);
}
}
figDst.IsClosed = true;
figDst.Segments.Add(segDst);
pathGeoDst.Figures.Add(figDst);
}
else if (geoSrc is PathGeometry)
{
PathGeometry pathGeoSrc = geoSrc as PathGeometry;
pathGeoDst.FillRule = pathGeoSrc.FillRule;
foreach (PathFigure figSrc in pathGeoSrc.Figures)
{
PathFigure figDst = new PathFigure
{
IsFilled = figSrc.IsFilled,
IsClosed = figSrc.IsClosed,
StartPoint = matx.Transform(figSrc.StartPoint)
};
Point ptLast = figDst.StartPoint;
foreach (PathSegment segSrc in figSrc.Segments)
{
PolyLineSegment segDst = new PolyLineSegment();
if (segSrc is LineSegment)
{
LineSegment lineSegSrc = segSrc as LineSegment;
ptLast = matx.Transform(lineSegSrc.Point);
segDst.Points.Add(ptLast);
}
else if (segSrc is PolyLineSegment)
{
PolyLineSegment polySegSrc = segSrc as PolyLineSegment;
foreach (Point pt in polySegSrc.Points)
{
ptLast = matx.Transform(pt);
segDst.Points.Add(ptLast);
}
}
else if (segSrc is BezierSegment)
{
BezierSegment bezSeg = segSrc as BezierSegment;
Point pt0 = ptLast;
Point pt1 = matx.Transform(bezSeg.Point1);
Point pt2 = matx.Transform(bezSeg.Point2);
Point pt3 = matx.Transform(bezSeg.Point3);
Points.Clear();
FlattenCubicBezier(Points, pt0, pt1, pt2, pt3, tolerance);
for (int i = 1; i < Points.Count; i++)
{
segDst.Points.Add(Points[i]);
}
ptLast = Points[Points.Count - 1];
}
else if (segSrc is PolyBezierSegment)
{
PolyBezierSegment polyBezSeg = segSrc as PolyBezierSegment;
for (int bez = 0; bez < polyBezSeg.Points.Count; bez += 3)
{
if (bez + 2 > polyBezSeg.Points.Count - 1)
{
break;
}
Point pt0 = ptLast;
Point pt1 = matx.Transform(polyBezSeg.Points[bez]);
Point pt2 = matx.Transform(polyBezSeg.Points[bez + 1]);
Point pt3 = matx.Transform(polyBezSeg.Points[bez + 2]);
Points.Clear();
FlattenCubicBezier(Points, pt0, pt1, pt2, pt3, tolerance);
for (int i = 1; i < Points.Count; i++)
{
segDst.Points.Add(Points[i]);
}
ptLast = Points[Points.Count - 1];
}
}
else if (segSrc is QuadraticBezierSegment)
{
QuadraticBezierSegment quadBezSeg = segSrc as QuadraticBezierSegment;
Point pt0 = ptLast;
Point pt1 = matx.Transform(quadBezSeg.Point1);
Point pt2 = matx.Transform(quadBezSeg.Point2);
Points.Clear();
FlattenQuadraticBezier(Points, pt0, pt1, pt2, tolerance);
for (int i = 1; i < Points.Count; i++)
{
segDst.Points.Add(Points[i]);
}
ptLast = Points[Points.Count - 1];
}
else if (segSrc is PolyQuadraticBezierSegment)
{
PolyQuadraticBezierSegment polyQuadBezSeg = segSrc as PolyQuadraticBezierSegment;
for (int bez = 0; bez < polyQuadBezSeg.Points.Count; bez += 2)
{
if (bez + 1 > polyQuadBezSeg.Points.Count - 1)
{
break;
}
Point pt0 = ptLast;
Point pt1 = matx.Transform(polyQuadBezSeg.Points[bez]);
Point pt2 = matx.Transform(polyQuadBezSeg.Points[bez + 1]);
Points.Clear();
FlattenQuadraticBezier(Points, pt0, pt1, pt2, tolerance);
for (int i = 1; i < Points.Count; i++)
{
segDst.Points.Add(Points[i]);
}
ptLast = Points[Points.Count - 1];
}
}
else if (segSrc is ArcSegment)
{
ArcSegment arcSeg = segSrc as ArcSegment;
Points.Clear();
FlattenArc(
Points,
ptLast,
arcSeg.Point,
arcSeg.Size.Width,
arcSeg.Size.Height,
arcSeg.RotationAngle,
arcSeg.IsLargeArc,
arcSeg.SweepDirection == SweepDirection.CounterClockwise,
tolerance);
// Set ptLast while transferring points
for (int i = 1; i < Points.Count; i++)
{
segDst.Points.Add(ptLast = Points[i]);
}
}
figDst.Segments.Add(segDst);
}
pathGeoDst.Figures.Add(figDst);
}
}
}