public static AppKit.NSImage GetNSImage(this IImage image)
{
var c = (CGImageImage)image;
return(new AppKit.NSImage(c.Image, Conversions.GetCGSize(c.Size)));
}
public void DrawPath(IEnumerable <PathOp> ops, Pen pen = null, Brush brush = null)
{
if (pen == null && brush == null)
{
return;
}
using (var path = new global::Android.Graphics.Path()) {
var bb = new BoundingBoxBuilder();
Point?prevPoint = null;
foreach (var op in ops)
{
var mt = op as MoveTo;
if (mt != null)
{
var p = mt.Point;
path.MoveTo((float)p.X, (float)p.Y);
bb.Add(p);
prevPoint = p;
continue;
}
var lt = op as LineTo;
if (lt != null)
{
var p = lt.Point;
path.LineTo((float)p.X, (float)p.Y);
bb.Add(p);
prevPoint = p;
continue;
}
var at = op as ArcTo;
if (at != null)
{
var p = at.Point;
if (!prevPoint.HasValue)
{
throw new NotSupportedException("Cannot begin path with Arc.");
}
var pp = prevPoint.Value;
Point c1, c2;
at.GetCircles(pp, out c1, out c2);
var circleCenter = at.LargeArc ^ !at.SweepClockwise ? c2 : c1;
var rect = new Rect(circleCenter - at.Radius, at.Radius * 2);
var startAngle = Conversions.RadToDeg((float)Math.Atan2(pp.Y - circleCenter.Y, pp.X - circleCenter.X));
var endAngle = Conversions.RadToDeg((float)Math.Atan2(p.Y - circleCenter.Y, p.X - circleCenter.X));
var sweepAngle = endAngle - startAngle;
if (at.SweepClockwise && sweepAngle < 0)
{
// If we want to go CW, sweepAngle needs to be positive
sweepAngle += 360.0f;
}
else if (!at.SweepClockwise && sweepAngle > 0)
{
// If we want to go CCW, sweepAngle needs to be negative
sweepAngle -= 360.0f;
}
path.AddArc(Conversions.GetRectF(rect), startAngle, sweepAngle);
bb.Add(p);
prevPoint = p;
continue;
}
var ct = op as CurveTo;
if (ct != null)
{
var p = ct.Point;
var c1 = ct.Control1;
var c2 = ct.Control2;
path.CubicTo((float)c1.X, (float)c1.Y, (float)c2.X, (float)c2.Y, (float)p.X, (float)p.Y);
bb.Add(p);
bb.Add(c1);
bb.Add(c2);
prevPoint = p;
continue;
}
var cp = op as ClosePath;
if (cp != null)
{
path.Close();
continue;
}
throw new NotSupportedException("Path Op " + op);
}
var frame = bb.BoundingBox;
if (brush != null)
{
var paint = GetBrushPaint(brush, frame);
graphics.DrawPath(path, paint);
}
if (pen != null)
{
var paint = GetPenPaint(pen);
graphics.DrawPath(path, paint);
}
}
}
public void DrawPath(IEnumerable <PathOp> ops, Pen pen = null, Brush brush = null)
{
if (pen == null && brush == null)
{
return;
}
DrawElement(() => {
var bb = new BoundingBoxBuilder();
foreach (var op in ops)
{
var mt = op as MoveTo;
if (mt != null)
{
var p = mt.Point;
if (!IsValid(p.X) || !IsValid(p.Y))
{
continue;
}
context.MoveTo((nfloat)p.X, (nfloat)p.Y);
bb.Add(p);
continue;
}
var lt = op as LineTo;
if (lt != null)
{
var p = lt.Point;
if (!IsValid(p.X) || !IsValid(p.Y))
{
continue;
}
context.AddLineToPoint((nfloat)p.X, (nfloat)p.Y);
bb.Add(p);
continue;
}
var at = op as ArcTo;
if (at != null)
{
var p = at.Point;
if (!IsValid(p.X) || !IsValid(p.Y))
{
continue;
}
var pp = Conversions.GetPoint(context.GetPathCurrentPoint());
if (pp == p)
{
continue;
}
Point c1, c2;
at.GetCircles(pp, out c1, out c2);
var circleCenter = (at.LargeArc ^ at.SweepClockwise) ? c1 : c2;
var startAngle = (float)Math.Atan2(pp.Y - circleCenter.Y, pp.X - circleCenter.X);
var endAngle = (float)Math.Atan2(p.Y - circleCenter.Y, p.X - circleCenter.X);
if (!IsValid(circleCenter.X) || !IsValid(circleCenter.Y) || !IsValid(startAngle) || !IsValid(endAngle))
{
context.MoveTo((nfloat)p.X, (nfloat)p.Y);
continue;
}
var clockwise = !at.SweepClockwise;
context.AddArc((nfloat)circleCenter.X, (nfloat)circleCenter.Y, (nfloat)at.Radius.Min, startAngle, endAngle, clockwise);
bb.Add(p);
continue;
}
var ct = op as CurveTo;
if (ct != null)
{
var p = ct.Point;
if (!IsValid(p.X) || !IsValid(p.Y))
{
continue;
}
var c1 = ct.Control1;
var c2 = ct.Control2;
if (!IsValid(c1.X) || !IsValid(c1.Y) || !IsValid(c2.X) || !IsValid(c2.Y))
{
context.MoveTo((nfloat)p.X, (nfloat)p.Y);
continue;
}
context.AddCurveToPoint((nfloat)c1.X, (nfloat)c1.Y, (nfloat)c2.X, (nfloat)c2.Y, (nfloat)p.X, (nfloat)p.Y);
bb.Add(p);
bb.Add(c1);
bb.Add(c2);
continue;
}
var cp = op as ClosePath;
if (cp != null)
{
context.ClosePath();
continue;
}
throw new NotSupportedException("Path Op " + op);
}
return(bb.BoundingBox);
}, pen, brush);
}
public void DrawPath(IEnumerable <PathOp> ops, Pen pen = null, Brush brush = null)
{
using (var path = new GraphicsPath()) {
var bb = new BoundingBoxBuilder();
var position = Point.Zero;
foreach (var op in ops)
{
var mt = op as MoveTo;
if (mt != null)
{
var p = mt.Point;
position = p;
bb.Add(p);
continue;
}
var lt = op as LineTo;
if (lt != null)
{
var p = lt.Point;
path.AddLine(Conversions.GetPointF(position), Conversions.GetPointF(p));
position = p;
bb.Add(p);
continue;
}
var at = op as ArcTo;
if (at != null)
{
var p = at.Point;
path.AddLine(Conversions.GetPointF(position), Conversions.GetPointF(p));
position = p;
bb.Add(p);
continue;
}
var ct = op as CurveTo;
if (ct != null)
{
var p = ct.Point;
var c1 = ct.Control1;
var c2 = ct.Control2;
path.AddBezier(Conversions.GetPointF(position), Conversions.GetPointF(c1),
Conversions.GetPointF(c2), Conversions.GetPointF(p));
position = p;
bb.Add(p);
bb.Add(c1);
bb.Add(c2);
continue;
}
var cp = op as ClosePath;
if (cp != null)
{
path.CloseFigure();
continue;
}
throw new NotSupportedException("Path Op " + op);
}
var frame = bb.BoundingBox;
if (brush != null)
{
graphics.FillPath(brush.GetBrush(frame), path);
}
if (pen != null)
{
graphics.DrawPath(pen.GetPen(), path);
}
}
}
