thick stroke Beziers

src/core/SkStroke.h

Index: src/core/SkStroke.h
diff --git a/src/core/SkStroke.h b/src/core/SkStroke.h
index a6a9f083311d7b73b7128ee9ffbc7a18d8fad762..cb329399a91952e67d0f097e59825d5890f8bfc6 100644
--- a/src/core/SkStroke.h
+++ b/src/core/SkStroke.h
@@ -11,6 +11,19 @@
 #include "SkPath.h"
 #include "SkPoint.h"
 #include "SkPaint.h"
+#include "SkStrokerPriv.h"
+
+// set to 1 to use experimental outset stroking with quads
+#ifndef QUAD_STROKE_APPROXIMATION
+#define QUAD_STROKE_APPROXIMATION 0
+#endif
+
+#if QUAD_STROKE_APPROXIMATION && defined(SK_DEBUG)
+extern bool gDebugStrokerErrorSet;
+extern SkScalar gDebugStrokerError;
+
+extern int gMaxRecursion[];
+#endif
 
 /** \class SkStroke
     SkStroke is the utility class that constructs paths by stroking
@@ -30,6 +43,9 @@ public:
     SkPaint::Join   getJoin() const { return (SkPaint::Join)fJoin; }
     void        setJoin(SkPaint::Join);
 
+#if QUAD_STROKE_APPROXIMATION
+    void    setError(SkScalar);
+#endif
     void    setMiterLimit(SkScalar);
     void    setWidth(SkScalar);
 
@@ -46,6 +62,9 @@ public:
     ////////////////////////////////////////////////////////////////
 
 private:
+#if QUAD_STROKE_APPROXIMATION
+    SkScalar    fError;
+#endif
     SkScalar    fWidth, fMiterLimit;
     uint8_t     fCap, fJoin;
     SkBool8     fDoFill;