/* -*- 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/. */

#ifndef MOZILLA_GFX_PATHRECORDING_H_

#define MOZILLA_GFX_PATHRECORDING_H_

#include "2D.h"

#include <vector>

#include <ostream>

#include "PathHelpers.h"

namespace mozilla {

namespace gfx {

struct PathOp

{

  enum OpType {

    OP_MOVETO = 0,

    OP_LINETO,

    OP_BEZIERTO,

    OP_QUADRATICBEZIERTO,

    OP_CLOSE

  };

  OpType mType;

  Point mP1;

  Point mP2;

  Point mP3;

};

const int32_t sPointCount[] = { 1, 1, 3, 2, 0, 0 };

class PathRecording;

class DrawEventRecorderPrivate;

class PathBuilderRecording : public PathBuilder

{

public:

  MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(PathBuilderRecording, override)

  PathBuilderRecording(PathBuilder *aBuilder, FillRule aFillRule)

    : mPathBuilder(aBuilder), mFillRule(aFillRule)

  {

  }

  /* Move the current point in the path, any figure currently being drawn will

   * be considered closed during fill operations, however when stroking the

   * closing line segment will not be drawn.

   */

  virtual void MoveTo(const Point &aPoint) override;

  /* Add a linesegment to the current figure */

  virtual void LineTo(const Point &aPoint) override;

  /* Add a cubic bezier curve to the current figure */

  virtual void BezierTo(const Point &aCP1,

                        const Point &aCP2,

                        const Point &aCP3) override;

  /* Add a quadratic bezier curve to the current figure */

  virtual void QuadraticBezierTo(const Point &aCP1,

                                 const Point &aCP2) override;

  /* Close the current figure, this will essentially generate a line segment

   * from the current point to the starting point for the current figure

   */

  virtual void Close() override;

  /* Add an arc to the current figure */

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

                   float aEndAngle, bool aAntiClockwise) override {

    ArcToBezier(this, aOrigin, Size(aRadius, aRadius), aStartAngle, aEndAngle,

                aAntiClockwise);

  }

  /* Point the current subpath is at - or where the next subpath will start

   * if there is no active subpath.

   */

  virtual Point CurrentPoint() const override;

  virtual already_AddRefed<Path> Finish() override;

  virtual BackendType GetBackendType() const override { return BackendType::RECORDING; }

private:

  friend class PathRecording;

  RefPtr<PathBuilder> mPathBuilder;

  FillRule mFillRule;

  std::vector<PathOp> mPathOps;

};

class PathRecording : public Path

{

public:

  MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(PathRecording, override)

  PathRecording(Path *aPath, const std::vector<PathOp> aOps, FillRule aFillRule)

    : mPath(aPath), mPathOps(aOps), mFillRule(aFillRule)

  {

  }

  ~PathRecording();

  virtual BackendType GetBackendType() const override { return BackendType::RECORDING; }

  virtual already_AddRefed<PathBuilder> CopyToBuilder(FillRule aFillRule) const override;

  virtual already_AddRefed<PathBuilder> TransformedCopyToBuilder(const Matrix &aTransform,

                                                             FillRule aFillRule) const override;

  virtual bool ContainsPoint(const Point &aPoint, const Matrix &aTransform) const override

  { return mPath->ContainsPoint(aPoint, aTransform); }

  virtual bool StrokeContainsPoint(const StrokeOptions &aStrokeOptions,

                                   const Point &aPoint,

                                   const Matrix &aTransform) const override

  { return mPath->StrokeContainsPoint(aStrokeOptions, aPoint, aTransform); }

  virtual Rect GetBounds(const Matrix &aTransform = Matrix()) const override

  { return mPath->GetBounds(aTransform); }

  virtual Rect GetStrokedBounds(const StrokeOptions &aStrokeOptions,

                                const Matrix &aTransform = Matrix()) const override

  { return mPath->GetStrokedBounds(aStrokeOptions, aTransform); }

  virtual void StreamToSink(PathSink *aSink) const override { mPath->StreamToSink(aSink); }

  virtual FillRule GetFillRule() const override { return mFillRule; }

  void StorePath(std::ostream &aStream) const;

  static void ReadPathToBuilder(std::istream &aStream, PathBuilder *aBuilder);

private:

  friend class DrawTargetWrapAndRecord;

  friend class DrawTargetRecording;

  friend class RecordedPathCreation;

  RefPtr<Path> mPath;

  std::vector<PathOp> mPathOps;

  FillRule mFillRule;

  // Event recorders that have this path in their event stream.

  std::vector<RefPtr<DrawEventRecorderPrivate>> mStoredRecorders;

};

} // namespace gfx

} // namespace mozilla

#endif /* MOZILLA_GFX_PATHRECORDING_H_ */