pathmeasure fuzzer

R=kjlubick@google.com, reed@google.com
Bug: skia:
Change-Id: I16a8b09312e5d1d1783bd6a4b791636ad8f63889
Reviewed-on: https://skia-review.googlesource.com/113165
Reviewed-by: Mike Reed <reed@google.com>
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Commit-Queue: Cary Clark <caryclark@skia.org>

1 files changed, 35 insertions, 0 deletions

diff --git a/fuzz/FuzzPathMeasure.cpp b/fuzz/FuzzPathMeasure.cpp
new file mode 100644
index 0000000000..e6933a856f
--- /dev/null
+++ b/fuzz/FuzzPathMeasure.cpp
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2018 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "Fuzz.h"
+#include "FuzzCommon.h"
+#include "SkPathMeasure.h"
+
+void inline ignoreResult(bool ) {}
+
+DEF_FUZZ(PathMeasure, fuzz) {
+    uint8_t bits;
+    fuzz->next(&bits);
+    SkScalar distance[6];
+    for (auto index = 0; index < 6; ++index) {
+        fuzz->next(&distance[index]);
+    }
+    SkPath path;
+    BuildPath(fuzz, &path, SkPath::Verb::kDone_Verb);
+    SkRect bounds = path.getBounds();
+    SkScalar maxDim = SkTMax(bounds.width(), bounds.height());
+    SkScalar resScale = maxDim / 1000;
+    SkPathMeasure measure(path, bits & 1, resScale);
+    SkPoint position;
+    SkVector tangent;
+    ignoreResult(measure.getPosTan(distance[0], &position, &tangent));
+    SkPath dst;
+    ignoreResult(measure.getSegment(distance[1], distance[2], &dst, (bits >> 1) & 1));
+    ignoreResult(measure.nextContour());
+    ignoreResult(measure.getPosTan(distance[3], &position, &tangent));
+    ignoreResult(measure.getSegment(distance[4], distance[5], &dst, (bits >> 2) & 1));
+}