CanvasState.cs

using System;
using System.Collections.Generic;
using System.Text;
using SkiaSharp;
 
namespace Waher.Script.Graphs.Canvas2D.Operations
{
    public class CanvasState
    {
        private SKColor fgColor;
        private SKColor bgColor;
        private SKPaint pen = null;
        private SKPaint brush = null;
        private float width = 1;
 
        public SKColor FgColor
        {
            get => this.fgColor;
            set
            {
                this.fgColor = value;
 
                this.pen?.Dispose();
                this.pen = null;
 
                this.brush?.Dispose();
                this.brush = null;
            }
        }
 
        public float Width
        {
            get => this.width;
            set
            {
                this.width = value;
 
                this.pen?.Dispose();
                this.pen = null;
            }
        }
 
        public SKColor BgColor
        {
            get => this.bgColor;
            set => this.bgColor = value;
        }
 
        public float X
        {
            get;
            set;
        }
 
        public float Y
        {
            get;
            set;
        }
 
        public SKPaint Pen
        {
            get
            {
                if (this.pen is null)
                {
                    this.pen = new SKPaint()
                    {
                        FilterQuality = SKFilterQuality.High,
                        IsAntialias = true,
                        Style = SKPaintStyle.Stroke,
                        Color = this.fgColor,
                        StrokeWidth = this.width
                    };
                }
 
                return this.pen;
            }
        }
 
        public SKPaint Brush
        {
            get
            {
                if (this.brush is null)
                {
                    this.brush = new SKPaint()
                    {
                        FilterQuality = SKFilterQuality.High,
                        IsAntialias = true,
                        Style = SKPaintStyle.Fill,
                        Color = this.fgColor
                    };
                }
 
                return this.brush;
            }
        }
    }
}