"Fix" for hairline corner bugs

gm/hairlines.cpp

 /*
  * Copyright 2013 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 "SkTArray.h"
@@ skipping 86 matching lines @@
             problem2->moveTo(SkIntToScalar(5), SkIntToScalar(1));
             problem2->lineTo(SkFloatToScalar(4.32787323f), SkFloatToScalar(1.67212653f));
             problem2->cubicTo(SkFloatToScalar(2.75223875f), SkFloatToScalar(3.24776125f),
                               SkFloatToScalar(3.00581908f), SkFloatToScalar(4.51236057f),
                               SkFloatToScalar(3.7580452f), SkFloatToScalar(4.37367964f));
             problem2->cubicTo(SkFloatToScalar(4.66472578f), SkFloatToScalar(3.888381f),
                               SkFloatToScalar(5.f), SkFloatToScalar(2.875f),
                               SkFloatToScalar(5.f), SkFloatToScalar(1.f));
             problem2->close();
         }
+
+        // Three paths that show the same bug (missing end caps)
+        {
+            // A caret (crbug.com/131770)
+            SkPath* bug0 = &fPaths.push_back();
+            bug0->moveTo(6.5f,5.5f);
+            bug0->lineTo(3.5f,0.5f);
+            bug0->moveTo(0.5f,5.5f);
+            bug0->lineTo(3.5f,0.5f);
+        }
+
+        {
+            // An X (crbug.com/137317)
+            SkPath* bug1 = &fPaths.push_back();
+
+            bug1->moveTo(1, 1);
+            bug1->lineTo(6, 6);
+            bug1->moveTo(1, 6);
+            bug1->lineTo(6, 1);
+        }
+
+        {
+            // A right angle (crbug.com/137465 and crbug.com/256776)
+            SkPath* bug2 = &fPaths.push_back();
+
+            bug2->moveTo(5.5f, 5.5f);
+            bug2->lineTo(5.5f, 0.5f);
+            bug2->lineTo(0.5f, 0.5f);
+        }
     }
 
     virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
         static const SkAlpha kAlphaValue[] = { 0xFF, 0x40 };
 
         enum {
             kMargin = 5,
         };
         int wrapX = canvas->getDeviceSize().fWidth - kMargin;
 
@@ skipping 41 matching lines @@
     SkTArray<SkPath> fPaths;
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static GM* MyFactory(void*) { return new HairlinesGM; }
 static GMRegistry reg(MyFactory);
 
 }