CShap flood fill 源代码

以下是C#语言的Flood Fill算法源代码：

using System;
using System.Collections.Generic;
using System.Drawing;

namespace FloodFillAlgorithm
{
    public class FloodFill
    {
        private Bitmap _bitmap;
        private Color _fillColor;
        private Color _targetColor;

        public FloodFill(Bitmap bitmap)
        {
            _bitmap = bitmap;
        }

        public void Fill(int x, int y, Color fillColor)
        {
            _fillColor = fillColor;
            _targetColor = _bitmap.GetPixel(x, y);

            if (_fillColor == _targetColor)
                return;

            Queue<Point> pixels = new Queue<Point>();
            pixels.Enqueue(new Point(x, y));

            while (pixels.Count > 0)
            {
                Point currentPixel = pixels.Dequeue();

                if (currentPixel.X < 0 || currentPixel.X >= _bitmap.Width || currentPixel.Y < 0 || currentPixel.Y >= _bitmap.Height)
                    continue;

                if (_bitmap.GetPixel(currentPixel.X, currentPixel.Y) != _targetColor)
                    continue;

                _bitmap.SetPixel(currentPixel.X, currentPixel.Y, _fillColor);

                pixels.Enqueue(new Point(currentPixel.X - 1, currentPixel.Y));
                pixels.Enqueue(new Point(currentPixel.X + 1, currentPixel.Y));
                pixels.Enqueue(new Point(currentPixel.X, currentPixel.Y - 1));
                pixels.Enqueue(new Point(currentPixel.X, currentPixel.Y + 1));
            }
        }
    }
}

此代码实现了基本的Flood Fill算法，使用了一个队列来存储待处理的像素点。每次从队列中取出一个像素点，检查它是否在位图范围内以及是否与目标颜色相同，如果是，则将其颜色设置为填充颜色，并将其周围的像素点加入队列中等待处理。