break out of cubic stroker loop on degenerate case

gm/dashcubics.cpp

Index: gm/dashcubics.cpp
diff --git a/gm/dashcubics.cpp b/gm/dashcubics.cpp
index 9a7d6d7482662a15de7be0101fd2d3c18980dad7..246d0548ca41835dc51b25cf05f4f4b0a8b3df74 100644
--- a/gm/dashcubics.cpp
+++ b/gm/dashcubics.cpp
@@ -26,30 +26,16 @@ protected:
     }
 
     virtual SkISize onISize() {
-        return SkISize::Make(640, 480);
+        return SkISize::Make(860, 700);
     }
 
-    virtual void onDraw(SkCanvas* canvas) {
-        SkPath path;
-        const char* d = "M 337,98 C 250,141 250,212 250,212 C 250,212 250,212 250,212"
-        "C 250,212 250,212 250,212 C 250,212 250,141 163,98 C 156,195 217,231 217,231"
-        "C 217,231 217,231 217,231 C 217,231 217,231 217,231 C 217,231 156,195 75,250"
-        "C 156,305 217,269 217,269 C 217,269 217,269 217,269 C 217,269 217,269 217,269"
-        "C 217,269 156,305 163,402 C 250,359 250,288 250,288 C 250,288 250,288 250,288"
-        "C 250,288 250,288 250,288 C 250,288 250,359 338,402 C 345,305 283,269 283,269"
-        "C 283,269 283,269 283,269 C 283,269 283,269 283,269 C 283,269 345,305 425,250"
-        "C 344,195 283,231 283,231 C 283,231 283,231 283,231 C 283,231 283,231 283,231"
-        "C 283,231 344,195 338,98";
-
-        SkParsePath::FromSVGString(d, &path);
-
-        SkScalar intervals[] = { 5, 10 };
+    void flower(SkCanvas* canvas, const SkPath& path, SkScalar intervals[2], SkPaint::Join join) {
         SkPathEffect* pe = SkDashPathEffect::Create(intervals, 2, 0);
 
         SkPaint paint;
         paint.setAntiAlias(true);
         paint.setStyle(SkPaint::kStroke_Style);
-
+        paint.setStrokeJoin(join);
         paint.setStrokeWidth(42);
         canvas->drawPath(path, paint);
 
@@ -64,6 +50,31 @@ protected:
         canvas->drawPath(path, paint);
     }
 
+    virtual void onDraw(SkCanvas* canvas) {
+        SkPath path;
+        const char* d = "M 337,98 C 250,141 250,212 250,212 C 250,212 250,212 250,212"
+        "C 250,212 250,212 250,212 C 250,212 250,141 163,98 C 156,195 217,231 217,231"
+        "C 217,231 217,231 217,231 C 217,231 217,231 217,231 C 217,231 156,195 75,250"
+        "C 156,305 217,269 217,269 C 217,269 217,269 217,269 C 217,269 217,269 217,269"
+        "C 217,269 156,305 163,402 C 250,359 250,288 250,288 C 250,288 250,288 250,288"
+        "C 250,288 250,288 250,288 C 250,288 250,359 338,402 C 345,305 283,269 283,269"
+        "C 283,269 283,269 283,269 C 283,269 283,269 283,269 C 283,269 345,305 425,250"
+        "C 344,195 283,231 283,231 C 283,231 283,231 283,231 C 283,231 283,231 283,231"
+        "C 283,231 344,195 338,98";
+
+        SkParsePath::FromSVGString(d, &path);
+            canvas->translate(-35.f, -55.f);
+        for (int x = 0; x < 2; ++x) {
+            for (int y = 0; y < 2; ++y) {
+                canvas->save();
+                canvas->translate(x * 430.f, y * 355.f);
+                SkScalar intervals[] = { 5 + (x ? 0 : 0.0001f + 0.0001f), 10 };
+                flower(canvas, path, intervals, y ? SkPaint::kDefault_Join : SkPaint::kRound_Join);
+                canvas->restore();
+            }
+        }
+    }
+
 private:
     typedef GM INHERITED;
 };