internal static CGPath CreateClippingPath(RectangleF rect, float radius)
{
var path = new CGPath();
path.MoveToPoint(rect.GetMinX(), rect.GetMinY());
path.AddLineToPoint(rect.GetMinX(), rect.GetMaxY() - radius);
path.AddArcToPoint(rect.GetMinX(), rect.GetMaxY(), rect.GetMinX() + radius, rect.GetMaxY(), radius);
path.AddLineToPoint(rect.GetMaxX() - radius, rect.GetMaxY());
path.AddArcToPoint(rect.GetMaxX(), rect.GetMaxY(), rect.GetMaxX(), rect.GetMaxY() - radius, radius);
path.AddLineToPoint(rect.GetMaxX(), rect.GetMinY());
path.CloseSubpath();
return path;
}
/// <summary>
/// Draws a polygon. The polygon can have stroke and/or fill.
/// </summary>
/// <param name="points">The points.</param>
/// <param name="fill">The fill color.</param>
/// <param name="stroke">The stroke color.</param>
/// <param name="thickness">The stroke thickness.</param>
/// <param name="dashArray">The dash array.</param>
/// <param name="lineJoin">The line join type.</param>
/// <param name="aliased">If set to <c>true</c> the shape will be aliased.</param>
public override void DrawPolygon(IList<ScreenPoint> points, OxyColor fill, OxyColor stroke, double thickness, double[] dashArray, LineJoin lineJoin, bool aliased)
{
this.SetAlias (aliased);
var convertedPoints = (aliased ? points.Select (p => p.ConvertAliased ()) : points.Select (p => p.Convert ())).ToArray ();
if (fill.IsVisible ()) {
this.SetFill (fill);
using (var path = new CGPath ()) {
path.AddLines (convertedPoints);
path.CloseSubpath ();
this.gctx.AddPath (path);
}
this.gctx.DrawPath (CGPathDrawingMode.Fill);
}
if (stroke.IsVisible () && thickness > 0) {
this.SetStroke (stroke, thickness, dashArray, lineJoin);
using (var path = new CGPath ()) {
path.AddLines (convertedPoints);
path.CloseSubpath ();
this.gctx.AddPath (path);
}
this.gctx.DrawPath (CGPathDrawingMode.Stroke);
}
}
