private static void RenderTwoStrokeNodes(StreamGeometryContext context, StrokeNode strokeNodePrevious, Rect strokeNodePreviousBounds, StrokeNode strokeNodeCurrent, Rect strokeNodeCurrentBounds, List <Point> pointBuffer1, List <Point> pointBuffer2, List <Point> pointBuffer3)
{
if (FuzzyContains(strokeNodePreviousBounds, strokeNodeCurrentBounds, 70.0) != RectCompareResult.NoItersection)
{
strokeNodePrevious.GetContourPoints(pointBuffer1);
AddFigureToStreamGeometryContext(context, pointBuffer1, strokeNodePrevious.IsEllipse);
Quad connectingQuad = strokeNodeCurrent.GetConnectingQuad();
if (!connectingQuad.IsEmpty)
{
pointBuffer3.Add(connectingQuad.A);
pointBuffer3.Add(connectingQuad.B);
pointBuffer3.Add(connectingQuad.C);
pointBuffer3.Add(connectingQuad.D);
AddFigureToStreamGeometryContext(context, pointBuffer3, isBezierFigure: false);
}
strokeNodeCurrent.GetContourPoints(pointBuffer2);
AddFigureToStreamGeometryContext(context, pointBuffer2, strokeNodeCurrent.IsEllipse);
}
else
{
strokeNodeCurrent.GetPointsAtStartOfSegment(pointBuffer1, pointBuffer2);
strokeNodeCurrent.GetPointsAtEndOfSegment(pointBuffer1, pointBuffer2);
ReverseDCPointsRenderAndClear(context, pointBuffer1, pointBuffer2, pointBuffer3, strokeNodeCurrent.IsEllipse, clear: false);
}
}
internal static void CalcGeometryAndBounds(StrokeNodeIterator iterator, DrawingAttributes drawingAttributes, bool calculateBounds, out Geometry geometry, out Rect bounds)
{
Matrix stylusTipTransform = drawingAttributes.StylusTipTransform;
if (stylusTipTransform != Matrix.Identity)
{
CalcGeometryAndBoundsWithTransform(iterator, drawingAttributes, MatrixTypes.TRANSFORM_IS_TRANSLATION, calculateBounds, out geometry, out bounds);
return;
}
StreamGeometry streamGeometry = new StreamGeometry();
streamGeometry.FillRule = FillRule.Nonzero;
StreamGeometryContext streamGeometryContext = streamGeometry.Open();
geometry = streamGeometry;
Rect rect = bounds = Rect.Empty;
try
{
StrokeNode strokeNode = default(StrokeNode);
StrokeNode strokeNodePrevious = default(StrokeNode);
StrokeNode strokeNode2 = default(StrokeNode);
StrokeNode strokeNode3 = default(StrokeNode);
Rect rect2 = rect;
Rect rect3 = rect;
Rect rect4 = rect;
double num = 95.0;
double num2 = Math.Max(drawingAttributes.Height, drawingAttributes.Width);
num += Math.Min(4.99999, num2 / 20.0 * 5.0);
double lastAngle = double.MinValue;
bool flag = true;
bool isEllipse = drawingAttributes.StylusTip == StylusTip.Ellipse;
bool ignorePressure = drawingAttributes.IgnorePressure;
List <Point> list = new List <Point>();
List <Point> list2 = new List <Point>();
List <Point> list3 = new List <Point>(4);
int count = iterator.Count;
int num3 = 0;
int previousIndex = -1;
while (num3 < count)
{
if (!strokeNodePrevious.IsValid)
{
if (!strokeNode2.IsValid)
{
strokeNodePrevious = iterator[num3++, previousIndex++];
rect2 = strokeNodePrevious.GetBounds();
continue;
}
strokeNodePrevious = strokeNode2;
rect2 = rect3;
strokeNode2 = strokeNode;
}
if (!strokeNode2.IsValid)
{
if (!strokeNode3.IsValid)
{
strokeNode2 = iterator[num3++, previousIndex];
rect3 = strokeNode2.GetBounds();
switch (FuzzyContains(rect3, rect2, flag ? 99.99999 : num))
{
case RectCompareResult.Rect1ContainsRect2:
strokeNodePrevious = iterator[num3 - 1, strokeNodePrevious.Index - 1];
rect2 = Rect.Union(rect3, rect2);
strokeNode2 = strokeNode;
previousIndex = num3 - 1;
break;
case RectCompareResult.Rect2ContainsRect1:
strokeNode2 = strokeNode;
break;
default:
previousIndex = num3 - 1;
break;
}
continue;
}
strokeNode2 = strokeNode3;
rect3 = rect4;
strokeNode3 = strokeNode;
}
if (!strokeNode3.IsValid)
{
strokeNode3 = iterator[num3++, previousIndex];
rect4 = strokeNode3.GetBounds();
RectCompareResult rectCompareResult = FuzzyContains(rect4, rect3, flag ? 99.99999 : num);
RectCompareResult rectCompareResult2 = FuzzyContains(rect4, rect2, flag ? 99.99999 : num);
if (flag && rectCompareResult == RectCompareResult.Rect1ContainsRect2 && rectCompareResult2 == RectCompareResult.Rect1ContainsRect2)
{
if (list.Count > 0)
{
strokeNode2.GetPointsAtEndOfSegment(list, list2);
ReverseDCPointsRenderAndClear(streamGeometryContext, list, list2, list3, isEllipse, clear: true);
}
strokeNodePrevious = iterator[num3 - 1, strokeNodePrevious.Index - 1];
rect2 = strokeNodePrevious.GetBounds();
strokeNode2 = strokeNode;
strokeNode3 = strokeNode;
previousIndex = num3 - 1;
continue;
}
switch (rectCompareResult)
{
case RectCompareResult.Rect1ContainsRect2:
strokeNode3 = iterator[num3 - 1, strokeNode2.Index - 1];
if (!strokeNode3.GetConnectingQuad().IsEmpty)
{
strokeNode2 = strokeNode3;
rect3 = Rect.Union(rect4, rect3);
previousIndex = num3 - 1;
}
strokeNode3 = strokeNode;
lastAngle = double.MinValue;
continue;
case RectCompareResult.Rect2ContainsRect1:
strokeNode3 = strokeNode;
continue;
}
previousIndex = num3 - 1;
}
bool flag2 = rect2.IntersectsWith(rect4);
if (calculateBounds)
{
bounds.Union(rect3);
}
if (list.Count == 0)
{
if (calculateBounds)
{
bounds.Union(rect2);
}
if (flag && flag2)
{
strokeNodePrevious.GetContourPoints(list3);
AddFigureToStreamGeometryContext(streamGeometryContext, list3, strokeNodePrevious.IsEllipse);
list3.Clear();
}
strokeNode2.GetPointsAtStartOfSegment(list, list2);
flag = false;
}
if (lastAngle == double.MinValue)
{
lastAngle = GetAngleBetween(strokeNodePrevious.Position, strokeNode2.Position);
}
double angleDeltaFromLast = GetAngleDeltaFromLast(strokeNode2.Position, strokeNode3.Position, ref lastAngle);
bool flag3 = Math.Abs(angleDeltaFromLast) > 90.0 && Math.Abs(angleDeltaFromLast) < 270.0;
bool flag4 = flag2 && !ignorePressure && strokeNode3.PressureFactor != 1f && Math.Abs(angleDeltaFromLast) > 30.0 && Math.Abs(angleDeltaFromLast) < 330.0;
double num4 = rect3.Height * rect3.Width;
double num5 = rect4.Height * rect4.Width;
bool flag5 = num4 != num5 || num4 != rect2.Height * rect2.Width;
bool flag6 = false;
if (flag2 && flag5 && Math.Min(num4, num5) / Math.Max(num4, num5) <= 0.9)
{
flag6 = true;
}
if (flag5 || angleDeltaFromLast != 0.0 || num3 >= count)
{
if ((flag2 && (flag4 | flag6)) | flag3)
{
strokeNode2.GetPointsAtEndOfSegment(list, list2);
ReverseDCPointsRenderAndClear(streamGeometryContext, list, list2, list3, isEllipse, clear: true);
if (flag6)
{
strokeNode2.GetContourPoints(list3);
AddFigureToStreamGeometryContext(streamGeometryContext, list3, strokeNode2.IsEllipse);
list3.Clear();
}
}
else
{
strokeNode3.GetPointsAtMiddleSegment(strokeNode2, angleDeltaFromLast, list, list2, out bool missingIntersection);
if (missingIntersection)
{
strokeNode2.GetPointsAtEndOfSegment(list, list2);
ReverseDCPointsRenderAndClear(streamGeometryContext, list, list2, list3, isEllipse, clear: true);
}
}
}
strokeNodePrevious = strokeNode;
rect2 = rect;
}
if (strokeNodePrevious.IsValid)
{
if (strokeNode2.IsValid)
{
if (calculateBounds)
{
bounds.Union(rect2);
bounds.Union(rect3);
}
if (list.Count > 0)
{
strokeNode2.GetPointsAtEndOfSegment(list, list2);
ReverseDCPointsRenderAndClear(streamGeometryContext, list, list2, list3, isEllipse, clear: false);
}
else
{
RenderTwoStrokeNodes(streamGeometryContext, strokeNodePrevious, rect2, strokeNode2, rect3, list, list2, list3);
}
}
else
{
if (calculateBounds)
{
bounds.Union(rect2);
}
strokeNodePrevious.GetContourPoints(list);
AddFigureToStreamGeometryContext(streamGeometryContext, list, strokeNodePrevious.IsEllipse);
}
}
else if (strokeNode2.IsValid && strokeNode3.IsValid)
{
if (calculateBounds)
{
bounds.Union(rect3);
bounds.Union(rect4);
}
if (list.Count > 0)
{
strokeNode3.GetPointsAtEndOfSegment(list, list2);
ReverseDCPointsRenderAndClear(streamGeometryContext, list, list2, list3, isEllipse, clear: false);
if (FuzzyContains(rect4, rect3, 70.0) != RectCompareResult.NoItersection)
{
strokeNode3.GetContourPoints(list3);
AddFigureToStreamGeometryContext(streamGeometryContext, list3, strokeNode3.IsEllipse);
}
}
else
{
RenderTwoStrokeNodes(streamGeometryContext, strokeNode2, rect3, strokeNode3, rect4, list, list2, list3);
}
}
}
finally
{
streamGeometryContext.Close();
geometry.Freeze();
}
}