private void AddLineCap(PointFP p1, PointFP p2, int lineCap)
{
if (lineCap == PenFP.LINECAP_BUTT || p1.Equals(p2))
{
return;
}
int dx = p2.X - p1.X;
int dy = p2.Y - p1.Y;
int len = PointFP.Distance(dx, dy);
PointFP[] cap = lineCap == PenFP.LINECAP_ROUND?GraphicsPathFP.roundCap:GraphicsPathFP.squareCap;
dx = MathFP.Mul(ff_rad, MathFP.Div(dx, len));
dy = MathFP.Mul(ff_rad, MathFP.Div(dy, len));
MatrixFP m = new MatrixFP(dx, dx, dy, -dy, p2.X, p2.Y);
outline.AddMoveTo(new PointFP(0, GraphicsPathFP.One).Transform(m));
for (int i = 0; i < cap.Length; i++)
{
outline.AddLineTo(new PointFP(cap[i]).Transform(m));
}
outline.AddLineTo(new PointFP(0, -GraphicsPathFP.One).Transform(m));
outline.AddClose();
}
public override void Close()
{
closed = true;
if (startCapP1 != null && startCapP2 != null && lastPoint != null && currPoint != null)
{
AddLineJoin(startCapP1.Equals(currPoint) ? lastPoint : currPoint, startCapP1, startCapP2);
}
LineTo(startPoint);
started = false;
}
public void AddCurveTo(PointFP control, PointFP point)
{
if (control.Equals(point))
{
AddLineTo(point);
return;
}
ExtendIfNeeded(1, 2);
cmds[cmdsSize++] = CMD_QCURVETO;
pnts[pntsSize++] = new PointFP(control);
pnts[pntsSize++] = new PointFP(point);
}
private void AddLineJoin(PointFP lastPoint, PointFP currPoint, PointFP nextPoint)
{
if (lastPoint == null || currPoint == null || nextPoint == null || nextPoint.Equals(currPoint) || lastPoint.Equals(currPoint))
{
return;
}
PointFP p1 = null, p2 = null;
LineFP head, tail, lastHead, lastTail;
CalcHeadTail(currPoint, nextPoint, head = new LineFP(), tail = new LineFP());
CalcHeadTail(lastPoint, currPoint, lastHead = new LineFP(), lastTail = new LineFP());
bool cross1, cross2, needLineJoin = false;
PointFP pi1 = new PointFP();
PointFP pi2 = new PointFP();
cross1 = LineFP.Intersects(new LineFP(head.P1, tail.P1), new LineFP(lastHead.P1, lastTail.P1), pi1);
cross2 = LineFP.Intersects(new LineFP(head.P2, tail.P2), new LineFP(lastHead.P2, lastTail.P2), pi2);
if (cross1 && !cross2 && pi1.X != SingleFP.NaN)
{
p1 = lastTail.P2;
p2 = head.P2;
needLineJoin = true;
}
else if (!cross1 && cross2 && pi2.X != SingleFP.NaN)
{
p1 = lastTail.P1;
p2 = head.P1;
needLineJoin = true;
}
if (needLineJoin)
{
outline.AddMoveTo(cross1 ? pi1 : pi2);
outline.AddLineTo(cross1 ? p2 : p1);
if (lineJoin == PenFP.LINEJOIN_MITER)
{
outline.AddLineTo(cross1 ? pi2 : pi1);
}
outline.AddLineTo(cross1 ? p1 : p2);
outline.AddClose();
if (lineJoin == PenFP.LINEJOIN_ROUND)
{
AddLineCap(cross2 ? pi2 : pi1, currPoint, PenFP.LINECAP_ROUND);
}
}
}
public void AddCurveTo(PointFP control1, PointFP control2, PointFP point)
{
if (pnts[pntsSize - 1].Equals(control1))
{
AddCurveTo(control2, point);
return;
}
if (point.Equals(control2))
{
AddCurveTo(control1, point);
return;
}
ExtendIfNeeded(1, 3);
cmds[cmdsSize++] = CMD_CCURVETO;
pnts[pntsSize++] = new PointFP(control1);
pnts[pntsSize++] = new PointFP(control2);
pnts[pntsSize++] = new PointFP(point);
}
public override void LineTo(PointFP point)
{
if (point.Equals(currPoint))
{
return;
}
LineFP head, tail;
CalcHeadTail(currPoint, point, head = new LineFP(), tail = new LineFP());
if (drawingCurve)
{
if (lastCurveTail != null)
{
curvePath1.AddLineTo(lastCurveTail.P1);
curvePath2.AddLineTo(lastCurveTail.P2);
}
lastCurveTail = new LineFP(tail);
}
else
{
if (needDrawStartCap)
{
//AddLineCap(point, currPoint, startLineCap);
startCapP1 = new PointFP(currPoint);
startCapP2 = new PointFP(point);
needDrawStartCap = false;
}
AddLineJoin(lastPoint, currPoint, point);
outline.AddMoveTo(head.P1);
outline.AddLineTo(tail.P1);
outline.AddLineTo(tail.P2);
outline.AddLineTo(head.P2);
outline.AddLineTo(head.P1);
outline.AddClose();
lastPoint = new PointFP(currPoint);
}
base.LineTo(point);
}
public static bool IsEmpty(PointFP p)
{
return(Empty.Equals(p));
}