Added a sample to show Convert Conic to Quads

samples/SkiaSharpSample.Shared/Samples/PathConicToQuadsSample.cs

@@ -0,0 +1,81 @@
+using SkiaSharp;
+
+namespace SkiaSharpSample.Samples
+{
+	[Preserve(AllMembers = true)]
+	public class PathConicToQuadsSample : SampleBase
+	{
+		[Preserve]
+		public PathConicToQuadsSample()
+		{
+		}
+
+		public override string Title => "Path (conic to quads)";
+
+		public override SampleCategories Category => SampleCategories.Paths;
+
+		protected override void OnDrawSample(SKCanvas canvas, int width, int height)
+		{
+			canvas.Clear(SKColors.White);
+			canvas.Scale(2);
+
+			var points = new[]
+			{
+				new SKPoint(10, 10),
+				new SKPoint(50, 20),
+				new SKPoint(100, 150)
+			};
+
+			using (SKPaint paint = new SKPaint())
+			using (SKPaint textPaint = new SKPaint())
+			{
+				paint.Style = SKPaintStyle.Stroke;
+				paint.StrokeWidth = 5;
+				paint.IsAntialias = true;
+				paint.StrokeCap = SKStrokeCap.Round;
+
+				textPaint.IsAntialias = true;
+
+				using (SKPath path = new SKPath())
+				{
+					// create a conic path
+					path.MoveTo(points[0]);
+					path.ConicTo(points[1], points[2], 10);
+
+					// draw the conic-based path
+					paint.Color = SampleMedia.Colors.XamarinDarkBlue;
+					canvas.DrawPath(path, paint);
+
+					// get the quads from the conic points
+					SKPoint[] pts;
+					var quads = SKPath.ConvertConicToQuads(points[0], points[1], points[2], 10, out pts, 2);
+
+					// move the points on a bit
+					for (int i = 0; i < pts.Length; i++) pts[i].Offset(120, 0);
+					// draw the quad-based path
+					using (var quadsPath = new SKPath())
+					{
+						quadsPath.MoveTo(pts[0].X, pts[0].Y);
+						for (int i = 0; i < quads; i++)
+						{
+							var idx = i * 2;
+							quadsPath.CubicTo(
+								pts[idx].X, pts[idx].Y,
+								pts[idx + 1].X, pts[idx + 1].Y,
+								pts[idx + 2].X, pts[idx + 2].Y);
+						}
+
+						paint.Color = SampleMedia.Colors.XamarinPurple;
+						canvas.DrawPath(quadsPath, paint);
+					}
+
+					// move the points on a bit
+					for (int i = 0; i < pts.Length; i++) pts[i].Offset(120, 0);
+					// draw the dots
+					paint.Color = SampleMedia.Colors.XamarinGreen;
+					canvas.DrawPoints(SKPointMode.Points, pts, paint);
+				}
+			}
+		}
+	}
+}

samples/SkiaSharpSample.Shared/SkiaSharpSample.Shared.projitems

@@ -18,6 +18,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)SampleMedia.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Samples\BitmapSubsetDecoderSample.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Samples\ManipulatedBitmapShaderSample.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Samples\PathConicToQuadsSample.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Samples\XamagonSample.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Samples\TextSample.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Samples\GradientSample.cs" />