Counts the number of colors in a bitmap, up through the given maximum. If the maximum is reached, the method will return early. - CSharp System.Drawing

CSharp examples for System.Drawing:Bitmap

  1. HOME
  2. CSharp
  3. System.Drawing
  4. Bitmap

Description

Counts the number of colors in a bitmap, up through the given maximum. If the maximum is reached, the method will return early.

Demo Code


using System.Windows.Forms;
using System.Text;
using System.Linq;
using System.Drawing;
using System.Collections.Generic;
using System;// w  w  w.  j  a  v  a  2s  .  co m

public class Main{
        /// <summary>
      /// Counts the number of colors in a bitmap, up through the given maximum. If the maximum is reached, the method will return early.
      /// </summary>
      public static int CountColors(Bitmap bmp, int max) {
         int count = 0;
         HashSet<Color> colors = new HashSet<Color>();
         for (int y = 0; y < bmp.Height && count < max; y++) {
            for (int x = 0; x < bmp.Width && count < max; x++) {
               Color color = bmp.GetPixel(x, y);
               if (!colors.Contains(color)) {
                  colors.Add(color);
                  count++;
               }
            }
         }
         return count;
      }
}

Related Tutorials