Improve Ganesh helpers.

mojo/skia/type_converters.h

+// 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.
+
+#ifndef MOJO_SKIA_TYPE_CONVERTERS_H_
+#define MOJO_SKIA_TYPE_CONVERTERS_H_
+
+#include "mojo/services/geometry/interfaces/geometry.mojom.h"
+#include "third_party/skia/include/core/SkMatrix.h"
+#include "third_party/skia/include/core/SkPoint.h"
+#include "third_party/skia/include/core/SkRRect.h"
+#include "third_party/skia/include/core/SkRect.h"
+
+namespace mojo {
+
+template <>
+struct TypeConverter<SkPoint, mojo::Point> {
+  static SkPoint Convert(const mojo::Point& input);
+};
+template <>
+struct TypeConverter<mojo::Point, SkPoint> {
+  static mojo::Point Convert(const SkPoint& input);
+};
+
+template <>
+struct TypeConverter<SkRect, mojo::Rect> {
+  static SkRect Convert(const mojo::Rect& input);
+};
+template <>
+struct TypeConverter<mojo::Rect, SkRect> {
+  static mojo::Rect Convert(const SkRect& input);
+};
+
+template <>
+struct TypeConverter<SkRRect, mojo::RRect> {
+  static SkRRect Convert(const mojo::RRect& input);
+};
+template <>
+struct TypeConverter<mojo::RRect, SkRRect> {
+  static mojo::RRect Convert(const SkRRect& input);
+};
+
+// Note: This transformation is lossy since Transform is 4x4 whereas
+// SkMatrix is only 3x3.
+template <>
+struct TypeConverter<SkMatrix, mojo::TransformPtr> {
+  static SkMatrix Convert(const mojo::TransformPtr& input);
+};
+template <>
+struct TypeConverter<mojo::TransformPtr, SkMatrix> {
+  static mojo::TransformPtr Convert(const SkMatrix& input);
+};
+
+}  // namespace mojo
+
+#endif  // MOJO_SKIA_TYPE_CONVERTERS_H_