|
public ArcTo ( |
||
| point1 | ||
| point2 | ||
| radius | float | |
| return | void | |
/// <summary>
///
/// </summary>
/// <param name="xpg"></param>
/// <param name="dx"></param>
/// <param name="dy"></param>
/// <param name="scale"></param>
/// <returns></returns>
public static SKPath ToSKPath(this XPathGeometry xpg, double dx, double dy, Func<double, float> scale)
{
var path = new SKPath();
path.FillType = xpg.FillRule == XFillRule.EvenOdd ? SKPathFillType.EvenOdd : SKPathFillType.Winding;
foreach (var xpf in xpg.Figures)
{
var previous = default(XPoint);
// Begin new figure.
path.MoveTo(
scale(xpf.StartPoint.X + dx),
scale(xpf.StartPoint.Y + dy));
previous = xpf.StartPoint;
foreach (var segment in xpf.Segments)
{
if (segment is XArcSegment)
{
var arcSegment = segment as XArcSegment;
path.ArcTo(
scale(arcSegment.Size.Width),
scale(arcSegment.Size.Height),
(float)arcSegment.RotationAngle,
arcSegment.IsLargeArc ? SKPathArcSize.Large : SKPathArcSize.Small,
arcSegment.SweepDirection == XSweepDirection.Clockwise ? SKPathDirection.Clockwise : SKPathDirection.CounterClockwise,
scale(arcSegment.Point.X + dx),
scale(arcSegment.Point.Y + dy));
previous = arcSegment.Point;
}
else if (segment is XCubicBezierSegment)
{
var cubicBezierSegment = segment as XCubicBezierSegment;
path.CubicTo(
scale(cubicBezierSegment.Point1.X + dx),
scale(cubicBezierSegment.Point1.Y + dy),
scale(cubicBezierSegment.Point2.X + dx),
scale(cubicBezierSegment.Point2.Y + dy),
scale(cubicBezierSegment.Point3.X + dx),
scale(cubicBezierSegment.Point3.Y + dy));
previous = cubicBezierSegment.Point3;
}
else if (segment is XLineSegment)
{
var lineSegment = segment as XLineSegment;
path.LineTo(
scale(lineSegment.Point.X + dx),
scale(lineSegment.Point.Y + dy));
previous = lineSegment.Point;
}
else if (segment is XPolyCubicBezierSegment)
{
var polyCubicBezierSegment = segment as XPolyCubicBezierSegment;
if (polyCubicBezierSegment.Points.Length >= 3)
{
path.CubicTo(
scale(polyCubicBezierSegment.Points[0].X + dx),
scale(polyCubicBezierSegment.Points[0].Y + dy),
scale(polyCubicBezierSegment.Points[1].X + dx),
scale(polyCubicBezierSegment.Points[1].Y + dy),
scale(polyCubicBezierSegment.Points[2].X + dx),
scale(polyCubicBezierSegment.Points[2].Y + dy));
previous = polyCubicBezierSegment.Points[2];
}
if (polyCubicBezierSegment.Points.Length > 3
&& polyCubicBezierSegment.Points.Length % 3 == 0)
{
for (int i = 3; i < polyCubicBezierSegment.Points.Length; i += 3)
{
path.CubicTo(
scale(polyCubicBezierSegment.Points[i].X + dx),
scale(polyCubicBezierSegment.Points[i].Y + dy),
scale(polyCubicBezierSegment.Points[i + 1].X + dx),
scale(polyCubicBezierSegment.Points[i + 1].Y + dy),
scale(polyCubicBezierSegment.Points[i + 2].X + dx),
scale(polyCubicBezierSegment.Points[i + 2].Y + dy));
previous = polyCubicBezierSegment.Points[i + 2];
}
}
}
else if (segment is XPolyLineSegment)
{
var polyLineSegment = segment as XPolyLineSegment;
if (polyLineSegment.Points.Length >= 1)
{
path.LineTo(
scale(polyLineSegment.Points[0].X + dx),
scale(polyLineSegment.Points[0].Y + dy));
previous = polyLineSegment.Points[0];
}
if (polyLineSegment.Points.Length > 1)
{
for (int i = 1; i < polyLineSegment.Points.Length; i++)
{
path.LineTo(
scale(polyLineSegment.Points[i].X + dx),
scale(polyLineSegment.Points[i].Y + dy));
previous = polyLineSegment.Points[i];
}
}
}
else if (segment is XPolyQuadraticBezierSegment)
{
var polyQuadraticSegment = segment as XPolyQuadraticBezierSegment;
if (polyQuadraticSegment.Points.Length >= 2)
{
path.QuadTo(
scale(polyQuadraticSegment.Points[0].X + dx),
scale(polyQuadraticSegment.Points[0].Y + dy),
scale(polyQuadraticSegment.Points[1].X + dx),
scale(polyQuadraticSegment.Points[1].Y + dy));
previous = polyQuadraticSegment.Points[1];
}
if (polyQuadraticSegment.Points.Length > 2
&& polyQuadraticSegment.Points.Length % 2 == 0)
{
for (int i = 3; i < polyQuadraticSegment.Points.Length; i += 3)
{
path.QuadTo(
scale(polyQuadraticSegment.Points[i].X + dx),
scale(polyQuadraticSegment.Points[i].Y + dy),
scale(polyQuadraticSegment.Points[i + 1].X + dx),
scale(polyQuadraticSegment.Points[i + 1].Y + dy));
previous = polyQuadraticSegment.Points[i + 1];
}
}
}
else if (segment is XQuadraticBezierSegment)
{
var quadraticBezierSegment = segment as XQuadraticBezierSegment;
path.QuadTo(
scale(quadraticBezierSegment.Point1.X + dx),
scale(quadraticBezierSegment.Point1.Y + dy),
scale(quadraticBezierSegment.Point2.X + dx),
scale(quadraticBezierSegment.Point2.Y + dy));
previous = quadraticBezierSegment.Point2;
}
else
{
throw new NotSupportedException("Not supported segment type: " + segment.GetType());
}
}
if (xpf.IsClosed)
{
path.Close();
}
}
return path;
}
static SkiaSharp.SKPath ResolveGraphicsPath(GraphicsPath path)
{
//convert from graphics path to internal presentation
SkiaSharp.SKPath innerPath = path.InnerPath as SkiaSharp.SKPath;
if (innerPath != null)
{
return(innerPath);
}
//--------
innerPath = new SkiaSharp.SKPath();
path.InnerPath = innerPath;
List <float> points;
List <PathCommand> cmds;
GraphicsPath.GetPathData(path, out points, out cmds);
int j = cmds.Count;
int p_index = 0;
for (int i = 0; i < j; ++i)
{
PathCommand cmd = cmds[i];
switch (cmd)
{
default:
throw new NotSupportedException();
case PathCommand.Arc:
var oval = SkiaSharp.SKRect.Create(points[p_index],
points[p_index + 1],
points[p_index + 2],
points[p_index + 3]);
innerPath.ArcTo(oval,
points[p_index + 4],
points[p_index + 5],
true);
p_index += 6;
break;
case PathCommand.Bezier:
innerPath.MoveTo(points[p_index]
, points[p_index + 1]);
innerPath.CubicTo(
points[p_index + 2],
points[p_index + 3],
points[p_index + 4],
points[p_index + 5],
points[p_index + 6],
points[p_index + 7]);
p_index += 8;
break;
case PathCommand.CloseFigure:
//?
break;
case PathCommand.Ellipse:
innerPath.AddOval(
SkiaSharp.SKRect.Create(
points[p_index],
points[p_index + 1],
points[p_index + 2],
points[p_index + 3]
));
p_index += 4;
break;
case PathCommand.Line:
innerPath.MoveTo(points[p_index],
points[p_index + 1]);
innerPath.LineTo(
points[p_index + 2],
points[p_index + 3]);
p_index += 4;
break;
case PathCommand.Rect:
innerPath.AddRect(
SkiaSharp.SKRect.Create(
points[p_index],
points[p_index + 1],
points[p_index + 2],
points[p_index + 3]
));
p_index += 4;
break;
case PathCommand.StartFigure:
break;
}
}
return(innerPath);
}
static SkiaSharp.SKPath ResolveGraphicsPath(GraphicsPath path)
{
//convert from graphics path to internal presentation
SkiaSharp.SKPath innerPath = path.InnerPath as SkiaSharp.SKPath;
if (innerPath != null)
{
return innerPath;
}
//--------
innerPath = new SkiaSharp.SKPath();
path.InnerPath = innerPath;
List<float> points;
List<PathCommand> cmds;
GraphicsPath.GetPathData(path, out points, out cmds);
int j = cmds.Count;
int p_index = 0;
for (int i = 0; i < j; ++i)
{
PathCommand cmd = cmds[i];
switch (cmd)
{
default:
throw new NotSupportedException();
case PathCommand.Arc:
var oval = SkiaSharp.SKRect.Create(points[p_index],
points[p_index + 1],
points[p_index + 2],
points[p_index + 3]);
innerPath.ArcTo(oval,
points[p_index + 4],
points[p_index + 5],
true);
p_index += 6;
break;
case PathCommand.Bezier:
innerPath.MoveTo(points[p_index]
, points[p_index + 1]);
innerPath.CubicTo(
points[p_index + 2],
points[p_index + 3],
points[p_index + 4],
points[p_index + 5],
points[p_index + 6],
points[p_index + 7]);
p_index += 8;
break;
case PathCommand.CloseFigure:
//?
break;
case PathCommand.Ellipse:
innerPath.AddOval(
SkiaSharp.SKRect.Create(
points[p_index],
points[p_index + 1],
points[p_index + 2],
points[p_index + 3]
));
p_index += 4;
break;
case PathCommand.Line:
innerPath.MoveTo(points[p_index],
points[p_index + 1]);
innerPath.LineTo(
points[p_index + 2],
points[p_index + 3]);
p_index += 4;
break;
case PathCommand.Rect:
innerPath.AddRect(
SkiaSharp.SKRect.Create(
points[p_index],
points[p_index + 1],
points[p_index + 2],
points[p_index + 3]
));
p_index += 4;
break;
case PathCommand.StartFigure:
break;
}
}
return innerPath;
}
