Port 3 API fuzzers to be oss-fuzz friendly

Also Remove ScaleToSides, which we hadn't been running for a while.

Bug: skia:
Change-Id: I772dad722c34681392d5b635b3de716f3b00d597
Reviewed-on: https://skia-review.googlesource.com/110443
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Kevin Lubick <kjlubick@google.com>

BUILD.gn

@@ -1713,7 +1713,6 @@ if (skia_enable_tools) {
       "fuzz/FuzzGradients.cpp",
       "fuzz/FuzzParsePath.cpp",
       "fuzz/FuzzPathop.cpp",
-      "fuzz/FuzzScaleToSides.cpp",
       "fuzz/fuzz.cpp",
       "fuzz/oss_fuzz/FuzzAnimatedImage.cpp",
       "fuzz/oss_fuzz/FuzzImage.cpp",

fuzz/Fuzz.h

@@ -134,9 +134,10 @@ struct Fuzzable {
     void (*fn)(Fuzz*);
 };
 
+// Not static so that we can link these into oss-fuzz harnesses if we like.
 #define DEF_FUZZ(name, f)                                               \
-    static void fuzz_##name(Fuzz*);                                     \
+    void fuzz_##name(Fuzz*);                                            \
     sk_tools::Registry<Fuzzable> register_##name({#name, fuzz_##name}); \
-    static void fuzz_##name(Fuzz* f)
+    void fuzz_##name(Fuzz* f)
 
 #endif//Fuzz_DEFINED

fuzz/FuzzCommon.h

@@ -1,5 +1,5 @@
 /*
- * Copyright 2018 Google Inc.
+ * Copyright 2018 Google, LLC
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.

fuzz/FuzzScaleToSides.cpp

@@ -1,43 +0,0 @@
-/*
- * Copyright 2016 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-// Reminder of how to run:
-//  $ env CC=afl-clang CXX=afl-clang++ ./gyp_skia
-//  $ ninja -C out/Debug fuzz
-//  $ afl-fuzz -i fuzz-in -o fuzz-out out/Debug/fuzz -n ScaleToSides -b @@
-// where you seed fuzz-in/ with one or more small files.
-
-#include "Fuzz.h"
-#include "SkScaleToSides.h"
-#include <cmath>
-
-DEF_FUZZ(ScaleToSides, fuzz) {
-    float radius1, radius2, width;
-    fuzz->next(&radius1, &radius2, &width);
-
-    if (!std::isfinite(radius1) ||
-        !std::isfinite(radius2) ||
-        !std::isfinite(width)   ||
-        radius1 <= 0.0f         ||
-        radius2 <= 0.0f         ||
-        width <= 0.0f)
-    {
-        return;
-    }
-
-    double scale = (double)width / ((double)radius1 + (double)radius2);
-    if (scale >= 1.0 || scale <= 0.0) {
-        return;
-    }
-    SkDebugf("%g %g %g %g\n", radius1, radius2, width, scale);
-    SkScaleToSides::AdjustRadii(width, scale, &radius1, &radius2);
-
-    // TODO(mtklein): add fuzz->keepResult()
-    volatile float junk = 0.0f;
-    junk *= radius1;
-    junk *= radius2;
-}

fuzz/oss_fuzz/FuzzAPIImageFilter.cpp

@@ -0,0 +1,16 @@
+/*
+ * Copyright 2018 Google, LLC
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "../Fuzz.h"
+
+void fuzz_ImageFilter(Fuzz* f);
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+    auto fuzz = Fuzz(SkData::MakeWithoutCopy(data, size));
+    fuzz_ImageFilter(&fuzz);
+    return 0;
+}

fuzz/oss_fuzz/FuzzAnimatedImage.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright 2018 Google Inc.
+ * Copyright 2018 Google, LLC
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.

fuzz/oss_fuzz/FuzzDrawFunctions.cpp

@@ -0,0 +1,16 @@
+/*
+ * Copyright 2018 Google, LLC
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "../Fuzz.h"
+
+void fuzz_DrawFunctions(Fuzz* f);
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+    auto fuzz = Fuzz(SkData::MakeWithoutCopy(data, size));
+    fuzz_DrawFunctions(&fuzz);
+    return 0;
+}

fuzz/oss_fuzz/FuzzGradients.cpp

@@ -0,0 +1,17 @@
+/*
+ * Copyright 2018 Google, LLC
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "../Fuzz.h"
+
+void fuzz_Gradients(Fuzz* f);
+
+bool FLAGS_verbose = false;
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+    auto fuzz = Fuzz(SkData::MakeWithoutCopy(data, size));
+    fuzz_Gradients(&fuzz);
+    return 0;
+}

fuzz/oss_fuzz/FuzzImage.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright 2018 Google Inc.
+ * Copyright 2018 Google, LLC
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.

fuzz/oss_fuzz/FuzzTextBlobDeserialize.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright 2018 Google Inc.
+ * Copyright 2018 Google, LLC
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.