Pen.cs

using System;
using Microsoft.Xna.Framework;
using MonoGame.Extended.Overlay.Extensions;
using SkiaSharp;

namespace MonoGame.Extended.Overlay;

public sealed class Pen : DisposableBase, IPaintProvider
{

    public Pen(Color color)
        : this(color, 1)
    {
    }

    public Pen(Color color, float strokeWidth)
        : this(color, strokeWidth, LineCap.Round, LineJoin.Round, 0)
    {
    }

    public Pen(Color color, float strokeWidth, LineCap lineCap, LineJoin lineJoin, float miter)
    {
        var paint = new SKPaint();

        paint.Color = color.ToSKColor();
        paint.IsAntialias = true;
        paint.IsStroke = true;
        paint.StrokeWidth = strokeWidth;
        paint.StrokeCap = Map(lineCap);
        paint.StrokeJoin = Map(lineJoin);
        paint.StrokeMiter = miter;

        Paint = paint;

        StrokeWidth = strokeWidth;
        LineCap = lineCap;
        LineJoin = lineJoin;
        MiterLimit = miter;
    }

    public Pen(Brush brush)
        : this(brush, 1)
    {
    }

    public Pen(Brush brush, float strokeWidth)
        : this(brush, strokeWidth, LineCap.Round, LineJoin.Round, 0)
    {
    }

    public Pen(Brush brush, float strokeWidth, LineCap lineCap, LineJoin lineJoin, float miter)
    {
        var paint = brush.Paint.Clone();

        paint.IsStroke = true;
        paint.StrokeWidth = strokeWidth;
        paint.StrokeCap = Map(lineCap);
        paint.StrokeJoin = Map(lineJoin);
        paint.StrokeMiter = miter;

        Paint = paint;

        StrokeWidth = strokeWidth;
        LineCap = lineCap;
        LineJoin = lineJoin;
        MiterLimit = miter;
    }

    public float StrokeWidth { get; }

    public LineCap LineCap { get; }

    public LineJoin LineJoin { get; }

    public float MiterLimit { get; }

    internal SKPaint Paint { get; }

    protected override void Dispose(bool disposing)
    {
        if (disposing)
        {
            Paint.Dispose();
        }
    }

    SKPaint IPaintProvider.Paint => Paint;

    private static SKStrokeCap Map(LineCap cap)
    {
        switch (cap)
        {
            case LineCap.Round:
                return SKStrokeCap.Round;
            case LineCap.Square:
                return SKStrokeCap.Square;
            case LineCap.Butt:
                return SKStrokeCap.Butt;
            default:
                throw new ArgumentOutOfRangeException(nameof(cap), cap, null);
        }
    }

    private static SKStrokeJoin Map(LineJoin join)
    {
        switch (join)
        {
            case LineJoin.Round:
                return SKStrokeJoin.Round;
            case LineJoin.Bevel:
                return SKStrokeJoin.Bevel;
            case LineJoin.Miter:
                return SKStrokeJoin.Miter;
            default:
                throw new ArgumentOutOfRangeException(nameof(join), join, null);
        }
    }

}