fix for teeny strokes

gm/strokes.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 "SkPath.h"
 #include "SkRandom.h"
@@ skipping 140 matching lines @@
             canvas->translate(0, 30);
             canvas->drawPath(fLinePath, strokePaint);
             canvas->restore();
         }
     }
 
 private:
     typedef skiagm::GM INHERITED;
 };
 
+class TeenyStrokesGM : public skiagm::GM {
+
+    SkString onShortName() override {
+        return SkString("teenyStrokes");
+    }
+
+    SkISize onISize() override {
+        return SkISize::Make(W, H*2);
+    }
+
+    static void line(SkScalar scale, SkCanvas* canvas, SkColor color) {
+        SkPaint p;
+        p.setAntiAlias(true);
+        p.setStyle(SkPaint::kStroke_Style);
+        p.setColor(color);
+        canvas->translate(50, 0);
+            canvas->save();
+        p.setStrokeWidth(scale * 5);
+            canvas->scale(1 / scale, 1 / scale);
+        canvas->drawLine(20 * scale, 20 * scale, 20 * scale, 100 * scale, p);
+        canvas->drawLine(20 * scale, 20 * scale, 100 * scale, 100 * scale, p);
+        canvas->restore();
+    }
+
+    void onDraw(SkCanvas* canvas) override {
+        line(0.00005f, canvas, SK_ColorBLACK);
+        line(0.000045f, canvas, SK_ColorRED);
+        line(0.0000035f, canvas, SK_ColorGREEN);
+        line(0.000003f, canvas, SK_ColorBLUE);
+        line(0.000002f, canvas, SK_ColorBLACK);
+    }
+private:
+    typedef skiagm::GM INHERITED;
+};
+
+
 class Strokes2GM : public skiagm::GM {
     SkPath fPath;
 protected:
     void onOnceBeforeDraw() override {
         SkRandom rand;
         fPath.moveTo(0, 0);
         for (int i = 0; i < 13; i++) {
             SkScalar x = rand.nextUScalar1() * (W >> 1);
             SkScalar y = rand.nextUScalar1() * (H >> 1);
             fPath.lineTo(x, y);
@@ skipping 240 matching lines @@
 static skiagm::GM* F3(void*) { return new Strokes4GM; }
 static skiagm::GM* F4(void*) { return new Strokes5GM; }
 
 static skiagm::GMRegistry R0(F0);
 static skiagm::GMRegistry R1(F1);
 static skiagm::GMRegistry R2(F2);
 static skiagm::GMRegistry R3(F3);
 static skiagm::GMRegistry R4(F4);
 
 DEF_GM( return new ZeroLenStrokesGM; )
+DEF_GM( return new TeenyStrokesGM; )