From 4aef1a55c419bd8843e2e15fbc3f6aa546ab2a82 Mon Sep 17 00:00:00 2001
From: davescriven <unknown@unknown.com>
Date: Sat, 18 Oct 2008 23:28:25 +0000
Subject: [PATCH] - Fixed "#7845 - Arc Path Renders incorrectly" as described
 in the work item - W3C example now renders   correctly. - Ensured that a
 divide by zero exception could not occur during rendering of stroke dash
 arrays.

---
 Basic Shapes/SvgGraphicsElement.cs | 2 +-
 Paths/SvgArcSegment.cs             | 2 +-
 Paths/SvgPathBuilder.cs            | 6 +++---
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/Basic Shapes/SvgGraphicsElement.cs b/Basic Shapes/SvgGraphicsElement.cs
index 5ff4d43..4e48869 100644
--- a/Basic Shapes/SvgGraphicsElement.cs	
+++ b/Basic Shapes/SvgGraphicsElement.cs	
@@ -110,7 +110,7 @@ namespace Svg
                                 pen.DashPattern = this.StrokeDashArray.ConvertAll<float>(delegate(SvgUnit unit)
                                 {
                                     // divide by stroke width - GDI behaviour that I don't quite understand yet.
-                                    return unit.Value / strokeWidth;
+                                    return unit.Value / ((strokeWidth <= 0) ? 1 : strokeWidth);
                                 }).ToArray();
                             }
 
diff --git a/Paths/SvgArcSegment.cs b/Paths/SvgArcSegment.cs
index f94cddb..011d3e7 100644
--- a/Paths/SvgArcSegment.cs
+++ b/Paths/SvgArcSegment.cs
@@ -99,7 +99,7 @@ namespace Svg.Pathing
             }
             else
             {
-                root = (this.Size == SvgArcSize.Large && this.Sweep == SvgArcSweep.Positive ? -1.0 : 1.0) * Math.Sqrt(numerator / (this.RadiusX * this.RadiusX * y1dash * y1dash + this.RadiusY * this.RadiusY * x1dash * x1dash));
+                root = ((this.Size == SvgArcSize.Large && this.Sweep == SvgArcSweep.Positive) || (this.Size == SvgArcSize.Small && this.Sweep == SvgArcSweep.Negative) ? -1.0 : 1.0) * Math.Sqrt(numerator / (this.RadiusX * this.RadiusX * y1dash * y1dash + this.RadiusY * this.RadiusY * x1dash * x1dash));
             }
 
             double cxdash = root * rx * y1dash / ry;
diff --git a/Paths/SvgPathBuilder.cs b/Paths/SvgPathBuilder.cs
index 1273222..387d125 100644
--- a/Paths/SvgPathBuilder.cs
+++ b/Paths/SvgPathBuilder.cs
@@ -57,8 +57,8 @@ namespace Svg
 
                             for (var i = 0; i < coords.Count; i += 7)
                             {
-                                size = (coords[i + 3] == 1.0f) ? SvgArcSize.Large : SvgArcSize.Small;
-                                sweep = (coords[i + 4] == 1.0f) ? SvgArcSweep.Positive : SvgArcSweep.Negative;
+                                size = (coords[i + 3] != 0.0f) ? SvgArcSize.Large : SvgArcSize.Small;
+                                sweep = (coords[i + 4] != 0.0f) ? SvgArcSweep.Positive : SvgArcSweep.Negative;
 
                                 // A|a rx ry x-axis-rotation large-arc-flag sweep-flag x y
                                 segments.Add(new SvgArcSegment(segments.Last.End, coords[i], coords[i + 1], coords[i + 2],
@@ -235,7 +235,7 @@ namespace Svg
         private static IEnumerable<float> ParseCoordinates(string coords)
         {
             // TODO: Handle "1-1" (new PointF(1, -1);
-            var parts = coords.Remove(0, 1).Replace("-", " -").Split(new[] { ',', ' '},
+            var parts = coords.Remove(0, 1).Replace("-", " -").Split(new[] { ',', ' ' },
                 StringSplitOptions.RemoveEmptyEntries);
 
             for (var i = 0; i < parts.Length; i++)
-- 
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