1 files changed, 91 insertions, 0 deletions
diff --git a/dom/canvas/CanvasPath.h b/dom/canvas/CanvasPath.h
new file mode 100644
index 000000000..e31b375cc
--- /dev/null
+++ b/dom/canvas/CanvasPath.h
@@ -0,0 +1,91 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef CanvasPath_h
+#define CanvasPath_h
+
+#include "mozilla/Attributes.h"
+#include "mozilla/RefPtr.h"
+#include "nsWrapperCache.h"
+#include "mozilla/gfx/2D.h"
+#include "mozilla/dom/BindingDeclarations.h"
+#include "mozilla/ErrorResult.h"
+
+namespace mozilla {
+namespace dom {
+
+enum class CanvasWindingRule : uint32_t;
+class SVGMatrix;
+
+class CanvasPath final :
+  public nsWrapperCache
+{
+public:
+  NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(CanvasPath)
+  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(CanvasPath)
+
+  nsCOMPtr<nsISupports> GetParentObject() { return mParent; }
+
+  JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
+
+  static already_AddRefed<CanvasPath> Constructor(const GlobalObject& aGlobal,
+                                                  ErrorResult& rv);
+  static already_AddRefed<CanvasPath> Constructor(const GlobalObject& aGlobal,
+                                                  CanvasPath& aCanvasPath,
+                                                  ErrorResult& rv);
+  static already_AddRefed<CanvasPath> Constructor(const GlobalObject& aGlobal,
+                                                  const nsAString& aPathString,
+                                                  ErrorResult& rv);
+
+  void ClosePath();
+  void MoveTo(double x, double y);
+  void LineTo(double x, double y);
+  void QuadraticCurveTo(double cpx, double cpy, double x, double y);
+  void BezierCurveTo(double cp1x, double cp1y,
+                     double cp2x, double cp2y,
+                     double x, double y);
+  void ArcTo(double x1, double y1, double x2, double y2, double radius,
+             ErrorResult& error);
+  void Rect(double x, double y, double w, double h);
+  void Arc(double x, double y, double radius,
+           double startAngle, double endAngle, bool anticlockwise,
+           ErrorResult& error);
+  void Ellipse(double x, double y, double radiusX, double radiusY,
+               double rotation, double startAngle, double endAngle,
+               bool anticlockwise, ErrorResult& error);
+
+  void LineTo(const gfx::Point& aPoint);
+  void BezierTo(const gfx::Point& aCP1,
+                const gfx::Point& aCP2,
+                const gfx::Point& aCP3);
+
+  already_AddRefed<gfx::Path> GetPath(const CanvasWindingRule& aWinding,
+                                  const gfx::DrawTarget* aTarget) const;
+
+  explicit CanvasPath(nsISupports* aParent);
+  // already_AddRefed arg because the return value from Path::CopyToBuilder()
+  // is passed directly and we can't drop the only ref to have a raw pointer.
+  CanvasPath(nsISupports* aParent,
+             already_AddRefed<gfx::PathBuilder> aPathBuilder);
+
+  void AddPath(CanvasPath& aCanvasPath,
+               const Optional<NonNull<SVGMatrix>>& aMatrix);
+
+private:
+  virtual ~CanvasPath() {}
+
+  nsCOMPtr<nsISupports> mParent;
+  static gfx::Float ToFloat(double aValue) { return gfx::Float(aValue); }
+
+  mutable RefPtr<gfx::Path> mPath;
+  mutable RefPtr<gfx::PathBuilder> mPathBuilder;
+
+  void EnsurePathBuilder() const;
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif /* CanvasPath_h */
+