fix cubic clip in y

gm/cubicpaths.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gm.h"
 #include "SkCanvas.h"
 #include "SkPaint.h"
@@ skipping 42 matching lines @@
     typedef skiagm::GM INHERITED;
 };
 
 
 class ClippedCubic2GM : public skiagm::GM {
 public:
     ClippedCubic2GM() {}
 
 protected:
 
-    SkString onShortName() {
+    SkString onShortName() override {
         return SkString("clippedcubic2");
     }
 
-    SkISize onISize() { return SkISize::Make(1240, 390); }
+    SkISize onISize() override { return SkISize::Make(1240, 390); }
 
     void onDraw(SkCanvas* canvas) override {
         canvas->save();
-        canvas->translate(-2, 20);
+        canvas->translate(-2, 120);
         drawOne(canvas, fPath, SkRect::MakeLTRB(0, 0, 80, 150));
         canvas->translate(0, 170);
         drawOne(canvas, fPath, SkRect::MakeLTRB(0, 0, 80, 100));
         canvas->translate(0, 170);
         drawOne(canvas, fPath, SkRect::MakeLTRB(0, 0, 30, 150));
         canvas->translate(0, 170);
         drawOne(canvas, fPath, SkRect::MakeLTRB(0, 0, 10, 150));
         canvas->restore();
+        canvas->save();
+        canvas->translate(20, -2);
+        drawOne(canvas, fFlipped, SkRect::MakeLTRB(0, 0, 150, 80));
+        canvas->translate(170, 0);
+        drawOne(canvas, fFlipped, SkRect::MakeLTRB(0, 0, 100, 80));
+        canvas->translate(170, 0);
+        drawOne(canvas, fFlipped, SkRect::MakeLTRB(0, 0, 150, 30));
+        canvas->translate(170, 0);
+        drawOne(canvas, fFlipped, SkRect::MakeLTRB(0, 0, 150, 10));
+        canvas->restore();
     }
 
     void drawOne(SkCanvas* canvas, const SkPath& path, const SkRect& clip) {
         SkPaint framePaint, fillPaint;
         framePaint.setStyle(SkPaint::kStroke_Style);
         canvas->drawRect(clip, framePaint);
         canvas->drawPath(path, framePaint);
         canvas->save();
         canvas->clipRect(clip);
         canvas->drawPath(path, fillPaint);
         canvas->restore();
     }
 
     void onOnceBeforeDraw() override {
         fPath.moveTo(69.7030518991886f, 0);
         fPath.cubicTo( 69.7030518991886f, 21.831149999999997f,
                 58.08369508178456f, 43.66448333333333f, 34.8449814469765f, 65.5f);
         fPath.cubicTo( 11.608591683531916f, 87.33115f, -0.010765133872116195f, 109.16448333333332f,
                 -0.013089005235602302f, 131);
         fPath.close();
+        fFlipped = fPath;
+        SkMatrix matrix;
+        matrix.reset();
+        matrix.setScaleX(0);
+        matrix.setScaleY(0);
+        matrix.setSkewX(1);
+        matrix.setSkewY(1);
+        fFlipped.transform(matrix);
     }
 
     SkPath fPath;
+    SkPath fFlipped;
 private:
     typedef skiagm::GM INHERITED;
 };
 
 
 class CubicPathGM : public skiagm::GM {
 public:
     CubicPathGM() {}
 
 protected:
@@ skipping 280 matching lines @@
 private:
     typedef skiagm::GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 DEF_GM( return new CubicPathGM; )
 DEF_GM( return new CubicClosePathGM; )
 DEF_GM( return new ClippedCubicGM; )
 DEF_GM( return new ClippedCubic2GM; )