Implement sk_sp<SkImageFilter> StructTraits

skia/public/interfaces/test/struct_traits_unittest.cc

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/message_loop/message_loop.h"
+#include "mojo/public/cpp/bindings/binding_set.h"
+#include "skia/public/interfaces/test/traits_test_service.mojom.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "third_party/skia/include/core/SkColorFilter.h"
+#include "third_party/skia/include/core/SkString.h"
+#include "third_party/skia/include/effects/SkColorFilterImageFilter.h"
+
+namespace skia {
+
+namespace {
+
+class StructTraitsTest : public testing::Test, public mojom::TraitsTestService {
+ public:
+  StructTraitsTest() {}
+
+ protected:
+  mojom::TraitsTestServicePtr GetTraitsTestProxy() {
+    return traits_test_bindings_.CreateInterfacePtrAndBind(this);
+  }
+
+ private:
+  // TraitsTestService:
+  void EchoImageFilter(const sk_sp<SkImageFilter>& i,
+                       const EchoImageFilterCallback& callback) override {
+    callback.Run(i);
+  }
+
+  base::MessageLoop loop_;
+  mojo::BindingSet<TraitsTestService> traits_test_bindings_;
+
+  DISALLOW_COPY_AND_ASSIGN(StructTraitsTest);
+};
+
+static sk_sp<SkImageFilter> make_scale(float amount,
+                                       sk_sp<SkImageFilter> input) {
+  SkScalar s = amount;
+  SkScalar matrix[20] = {s, 0, 0, 0, 0, 0, s, 0, 0, 0,
+                         0, 0, s, 0, 0, 0, 0, 0, s, 0};
+  sk_sp<SkColorFilter> filter(
+      SkColorFilter::MakeMatrixFilterRowMajor255(matrix));
+  return SkColorFilterImageFilter::Make(std::move(filter), std::move(input));
+}
+
+}  // namespace
+
+TEST_F(StructTraitsTest, ImageFilter) {
+  sk_sp<SkImageFilter> input(make_scale(0.5f, nullptr));
+  SkString input_str;
+  input->toString(&input_str);
+  mojom::TraitsTestServicePtr proxy = GetTraitsTestProxy();
+  sk_sp<SkImageFilter> output;
+  proxy->EchoImageFilter(input, &output);
+  SkString output_str;
+  output->toString(&output_str);
+  EXPECT_EQ(input_str, output_str);
+}
+
+}  // namespace skia