ckfinder/_source/Connector/OctreeQuantizer.cs

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/* 
  THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF 
  ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO 
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A 
  PARTICULAR PURPOSE. 
  
    This is sample code and is freely distributable. 
*/ 
using System;
using System.Collections;
using System.Drawing;
using System.Drawing.Imaging;

namespace ImageManipulation
{
	/// <summary>
	/// Quantize using an Octree
	/// </summary>
	public class OctreeQuantizer : Quantizer
	{
		/// <summary>
		/// Construct the octree quantizer
		/// </summary>
		/// <remarks>
		/// The Octree quantizer is a two pass algorithm. The initial pass sets up the octree,
		/// the second pass quantizes a color based on the nodes in the tree
		/// </remarks>
		/// <param name="maxColors">The maximum number of colors to return</param>
		/// <param name="maxColorBits">The number of significant bits</param>
		public OctreeQuantizer ( int maxColors , int maxColorBits ) : base ( false )
		{
			if ( maxColors > 255 )
				throw new ArgumentOutOfRangeException ( "maxColors" , maxColors , "The number of colors should be less than 256" ) ;

			if ( ( maxColorBits < 1 ) | ( maxColorBits > 8 ) )
				throw new ArgumentOutOfRangeException ( "maxColorBits" , maxColorBits , "This should be between 1 and 8" ) ;

			// Construct the octree
			_octree = new Octree ( maxColorBits  ) ;

			_maxColors = maxColors ;
		}

		/// <summary>
		/// Process the pixel in the first pass of the algorithm
		/// </summary>
		/// <param name="pixel">The pixel to quantize</param>
		/// <remarks>
		/// This function need only be overridden if your quantize algorithm needs two passes,
		/// such as an Octree quantizer.
		/// </remarks>
		protected override void InitialQuantizePixel ( Color32 pixel )
		{
			// Add the color to the octree
			_octree.AddColor ( pixel ) ;
		}

		/// <summary>
		/// Override this to process the pixel in the second pass of the algorithm
		/// </summary>