更新

2025-07-11 09:20:23 +08:00
parent c7b104f44f
commit 4d35cadb56
840 changed files with 102347 additions and 11595 deletions
--- a/WPFDark/Internals/StreamGeometryContextExtensions.cs
+++ b/WPFDark/Internals/StreamGeometryContextExtensions.cs
@@ -0,0 +1,95 @@
+using System;
+using System.Runtime.CompilerServices;
+using System.Windows;
+using System.Windows.Media;
+
+namespace WPFDark.Internals
+{
+    internal static class StreamGeometryContextExtensions
+    {
+        // https://stackoverflow.com/questions/2979834/how-to-draw-a-full-ellipse-in-a-streamgeometry-in-wpf
+        private static readonly double ControlPointRatio = (Math.Sqrt(2) - 1) * 4 / 3;
+
+        internal static void DrawEllipse(this StreamGeometryContext ctx,
+            Point center, double radiusX, double radiusY, bool isFilled, bool isStroked)
+        {
+            var x0 = center.X - radiusX;
+            var x1 = center.X - radiusX * ControlPointRatio;
+            var x2 = center.X;
+            var x3 = center.X + radiusX * ControlPointRatio;
+            var x4 = center.X + radiusX;
+
+            var y0 = center.Y - radiusY;
+            var y1 = center.Y - radiusY * ControlPointRatio;
+            var y2 = center.Y;
+            var y3 = center.Y + radiusY * ControlPointRatio;
+            var y4 = center.Y + radiusY;
+
+            ctx.BeginFigure(new Point(x2, y0), isFilled, true);
+            ctx.BezierTo(new Point(x3, y0), new Point(x4, y1), new Point(x4, y2), isStroked, true);
+            ctx.BezierTo(new Point(x4, y3), new Point(x3, y4), new Point(x2, y4), isStroked, true);
+            ctx.BezierTo(new Point(x1, y4), new Point(x0, y3), new Point(x0, y2), isStroked, true);
+            ctx.BezierTo(new Point(x0, y1), new Point(x1, y0), new Point(x2, y0), isStroked, true);
+        }
+
+        internal static void DrawArc(this StreamGeometryContext ctx,
+            Point center, double radiusX, double radiusY,
+            ArcPos pos)
+        {
+            var x0 = center.X - radiusX;
+            var x1 = center.X - radiusX * ControlPointRatio;
+            var x2 = center.X;
+            var x3 = center.X + radiusX * ControlPointRatio;
+            var x4 = center.X + radiusX;
+
+            var y0 = center.Y - radiusY;
+            var y1 = center.Y - radiusY * ControlPointRatio;
+            var y2 = center.Y;
+            var y3 = center.Y + radiusY * ControlPointRatio;
+            var y4 = center.Y + radiusY;
+
+            switch (pos)
+            {
+                case ArcPos.RightTop:
+                    ctx.BeginFigure(new Point(x2, y0), false, false);
+                    ctx.BezierTo(new Point(x3, y0), new Point(x4, y1), new Point(x4, y2), true, true);
+                    break;
+
+                case ArcPos.LeftTop:
+                    ctx.BeginFigure(new Point(x2, y0), false, false);
+                    ctx.BezierTo(new Point(x1, y0), new Point(x0, y1), new Point(x0, y2), true, true);
+                    break;
+
+                case ArcPos.RightBottom:
+                    ctx.BeginFigure(new Point(x2, y4), false, false);
+                    ctx.BezierTo(new Point(x3, y4), new Point(x4, y3), new Point(x4, y2), true, true);
+                    break;
+
+                case ArcPos.LeftBottom:
+                    ctx.BeginFigure(new Point(x2, y4), false, false);
+                    ctx.BezierTo(new Point(x1, y4), new Point(x0, y3), new Point(x0, y2), true, true);
+                    break;
+
+                default:
+                    throw new ArgumentOutOfRangeException(nameof(pos), pos, null);
+            }
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        internal static void DrawTriangle(this StreamGeometryContext ctx,
+            Point pos1, Point pos2, Point pos3, bool isStroked, bool isClosed)
+        {
+            ctx.BeginFigure(pos1, true, isClosed);
+            ctx.LineTo(pos2, isStroked, false);
+            ctx.LineTo(pos3, isStroked, false);
+        }
+    }
+
+    internal enum ArcPos
+    {
+        RightTop,
+        LeftTop,
+        RightBottom,
+        LeftBottom
+    }
+}