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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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Task/Bitmap-Flood-fill/C-sharp/bitmap-flood-fill.cs Normal file
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using System;
using System.Collections.Generic;
using System.Drawing;
namespace FloodFill
{
class Program
{
private static bool ColorMatch(Color a, Color b)
{
return (a.ToArgb() & 0xffffff) == (b.ToArgb() & 0xffffff);
}
static void FloodFill(Bitmap bmp, Point pt, Color targetColor, Color replacementColor)
{
Queue<Point> q = new Queue<Point>();
q.Enqueue(pt);
while (q.Count > 0)
{
Point n = q.Dequeue();
if (!ColorMatch(bmp.GetPixel(n.X, n.Y),targetColor))
continue;
Point w = n, e = new Point(n.X + 1, n.Y);
while ((w.X >= 0) && ColorMatch(bmp.GetPixel(w.X, w.Y),targetColor))
{
bmp.SetPixel(w.X, w.Y, replacementColor);
if ((w.Y > 0) && ColorMatch(bmp.GetPixel(w.X, w.Y - 1),targetColor))
q.Enqueue(new Point(w.X, w.Y - 1));
if ((w.Y < bmp.Height - 1) && ColorMatch(bmp.GetPixel(w.X, w.Y + 1),targetColor))
q.Enqueue(new Point(w.X, w.Y + 1));
w.X--;
}
while ((e.X <= bmp.Width - 1) && ColorMatch(bmp.GetPixel(e.X, e.Y),targetColor))
{
bmp.SetPixel(e.X, e.Y, replacementColor);
if ((e.Y > 0) && ColorMatch(bmp.GetPixel(e.X, e.Y - 1), targetColor))
q.Enqueue(new Point(e.X, e.Y - 1));
if ((e.Y < bmp.Height - 1) && ColorMatch(bmp.GetPixel(e.X, e.Y + 1), targetColor))
q.Enqueue(new Point(e.X, e.Y + 1));
e.X++;
}
}
}
static void Main(string[] args)
{
Bitmap bmp = new Bitmap("Unfilledcirc.bmp");
FloodFill(bmp, new Point(200, 200), Color.White, Color.Red);
FloodFill(bmp, new Point(100, 100), Color.Black, Color.Blue);
bmp.Save("Filledcirc.bmp");
}
}
}