resolution dependent path measure

gm/bug530095.cpp

+/*
+ * Copyright 2016 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 "SkDashPathEffect.h"
+
+DEF_SIMPLE_GM(bug530095, canvas, 900, 1200) {
+    SkPath path1, path2;
+    path1.addCircle(200, 200, 124);
+    path2.addCircle(2, 2, 1.24f);
+
+    SkPaint paint;
+    paint.setAntiAlias(true);
+    paint.setStyle(SkPaint::kStroke_Style);
+    paint.setStrokeWidth(26);
+    SkScalar intervals[] = {700, 700 };
+    int intervalCount = (int) SK_ARRAY_COUNT(intervals);
+    paint.setPathEffect(SkDashPathEffect::Create(intervals, intervalCount, -40))->unref();
+    canvas->drawPath(path1, paint);
+
+    paint.setStrokeWidth(0.26f);
+    SkScalar smIntervals[] = {7, 7 };
+    int smIntervalCount = (int) SK_ARRAY_COUNT(smIntervals);
+    paint.setPathEffect(SkDashPathEffect::Create(smIntervals, smIntervalCount, -0.40f))->unref();
+    canvas->save();
+    canvas->scale(100, 100);
+    canvas->translate(4, 0);
+    canvas->drawPath(path2, paint);
+    canvas->restore();
+
+    paint.setStrokeWidth(26);
+    paint.setPathEffect(SkDashPathEffect::Create(intervals, intervalCount, 0))->unref();
+    canvas->save();
+    canvas->translate(0, 400);
+    canvas->drawPath(path1, paint);
+    canvas->restore();
+
+    paint.setStrokeWidth(0.26f);
+    paint.setPathEffect(SkDashPathEffect::Create(smIntervals, smIntervalCount, 0))->unref();
+    canvas->scale(100, 100);
+    canvas->translate(4, 4);
+    canvas->drawPath(path2, paint);
+}