/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* 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/. */

#include "2D.h"

#include <vector>

namespace mozilla {

namespace gfx {

struct FlatPathOp

{

  enum OpType {

    OP_MOVETO,

    OP_LINETO,

  };

  OpType mType;

  Point mPoint;

};

class FlattenedPath : public PathSink

{

public:

  MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(FlattenedPath, override)

  FlattenedPath() : mCachedLength(0)

                  , mCalculatedLength(false)

  {

  }

  virtual void MoveTo(const Point &aPoint) override;

  virtual void LineTo(const Point &aPoint) override;

  virtual void BezierTo(const Point &aCP1,

                        const Point &aCP2,

                        const Point &aCP3) override;

  virtual void QuadraticBezierTo(const Point &aCP1,

                                 const Point &aCP2) override;

  virtual void Close() override;

  virtual void Arc(const Point &aOrigin, float aRadius, float aStartAngle,

                   float aEndAngle, bool aAntiClockwise = false) override;

  virtual Point CurrentPoint() const override { return mPathOps.empty() ? Point() : mPathOps[mPathOps.size() - 1].mPoint; }

  Float ComputeLength();

  Point ComputePointAtLength(Float aLength, Point *aTangent);

private:

  Float mCachedLength;

  bool mCalculatedLength;

  Point mLastMove;

  std::vector<FlatPathOp> mPathOps;

};

} // namespace gfx

} // namespace mozilla