/*

 * Copyright 2024 Google LLC

 *

 * Use of this source code is governed by a BSD-style license that can be

 * found in the LICENSE file.

 */

#ifndef SkArc_DEFINED

#define SkArc_DEFINED

#include "include/core/SkRect.h"

#include "include/core/SkScalar.h"

// Represents an arc along an oval boundary, or a closed wedge of the oval.

struct SkArc {

    enum class Type : bool {

        kArc,   // An arc along the perimeter of the oval

        kWedge  // A closed wedge that includes the oval's center

    };

    SkArc() = default;

    SkArc(const SkArc& arc) = default;

    SkArc& operator=(const SkArc& arc) = default;

    const SkRect& oval() const { return fOval; }

    SkScalar startAngle() const { return fStartAngle; }

    SkScalar sweepAngle() const { return fSweepAngle; }

    bool isWedge() const { return fType == Type::kWedge; }

    friend bool operator==(const SkArc& a, const SkArc& b) {

        return a.fOval == b.fOval && a.fStartAngle == b.fStartAngle &&

               a.fSweepAngle == b.fSweepAngle && a.fType == b.fType;

    }

    friend bool operator!=(const SkArc& a, const SkArc& b) { return !(a == b); }

    // Preferred factory that explicitly states which type of arc

    static SkArc Make(const SkRect& oval,

                      SkScalar startAngleDegrees,

                      SkScalar sweepAngleDegrees,

                      Type type) {

        return SkArc(oval, startAngleDegrees, sweepAngleDegrees, type);

    }

    // Deprecated factory to assist with legacy code based on `useCenter`

    static SkArc Make(const SkRect& oval,

                      SkScalar startAngleDegrees,

                      SkScalar sweepAngleDegrees,

                      bool useCenter) {

        return SkArc(

                oval, startAngleDegrees, sweepAngleDegrees, useCenter ? Type::kWedge : Type::kArc);

    }

    // Bounds of oval containing the arc.

    SkRect   fOval = SkRect::MakeEmpty();

    // Angle in degrees where the arc begins. Zero means horizontally to the right.

    SkScalar fStartAngle = 0;

    // Sweep angle in degrees; positive is clockwise.

    SkScalar fSweepAngle = 0;

    Type     fType = Type::kArc;

private:

    SkArc(const SkRect& oval, SkScalar startAngle, SkScalar sweepAngle, Type type)

            : fOval(oval), fStartAngle(startAngle), fSweepAngle(sweepAngle), fType(type) {}

};

#endif