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/////////////////////////////////////////////////////////////////////////////////
// Paint.NET //
// Copyright (C) dotPDN LLC, Rick Brewster, Tom Jackson, and contributors. //
// Portions Copyright (C) Microsoft Corporation. All Rights Reserved. //
// See src/Resources/Files/License.txt for full licensing and attribution //
// details. //
// . //
/////////////////////////////////////////////////////////////////////////////////
using System;
using System.Collections;
using System.Drawing;
namespace Tango.RemoteDesktop.Quantization
{
internal sealed class PaletteTable
{
private Color[] palette;
public Color this[int index]
{
get
{
return this.palette[index];
}
set
{
this.palette[index] = value;
}
}
private int GetDistanceSquared(Color a, Color b)
{
int dsq = 0; // delta squared
int v;
v = a.B - b.B;
dsq += v * v;
v = a.G - b.G;
dsq += v * v;
v = a.R - b.R;
dsq += v * v;
return dsq;
}
public int FindClosestPaletteIndex(Color pixel)
{
int dsqBest = int.MaxValue;
int ret = 0;
for (int i = 0; i < this.palette.Length; ++i)
{
int dsq = GetDistanceSquared(this.palette[i], pixel);
if (dsq < dsqBest)
{
dsqBest = dsq;
ret = i;
}
}
return ret;
}
public PaletteTable(Color[] palette)
{
this.palette = (Color[])palette.Clone();
}
}
}
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