86 lines
2.3 KiB
C#
86 lines
2.3 KiB
C#
using System.Collections.Generic;
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namespace Palettizer
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{
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public class Palette
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{
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public Dictionary<Color, byte> ColorToGrayscaleMap { get; }
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public byte GrayscaleIndex { get; set; }
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public List<byte[]> AlternateColorRows { get; }
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public int Width { get => ColorToGrayscaleMap.Count; }
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public int Height { get => AlternateColorRows.Count + 1; }
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public Palette()
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{
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ColorToGrayscaleMap = new Dictionary<Color, byte>();
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GrayscaleIndex = 0;
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AlternateColorRows = new List<byte[]>();
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}
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public void AddColor(Color color, byte grayscaleIndex)
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{
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ColorToGrayscaleMap.Add(color, grayscaleIndex);
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}
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public void AddAlternateColorRow(Color[] colors)
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{
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var byteArray = new byte[ColorToGrayscaleMap.Count * 4];
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foreach (var color in colors)
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{
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if (ColorToGrayscaleMap.ContainsKey(color))
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{
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var grayscaleIndex = ColorToGrayscaleMap[color];
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byteArray[grayscaleIndex] = color.R;
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byteArray[grayscaleIndex + 1] = color.G;
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byteArray[grayscaleIndex + 2] = color.B;
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byteArray[grayscaleIndex + 3] = color.A;
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}
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else
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{
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System.Console.WriteLine("That color doesn't exist in the grayscale palette!! Bailing!!!");
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}
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}
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AlternateColorRows.Add(byteArray);
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}
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public byte[] CreateIndexedPaletteBitmap()
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{
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var paletteBitmap = new byte[ColorToGrayscaleMap.Count * 4 * (AlternateColorRows.Count + 1)];
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var index = 0;
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foreach (KeyValuePair<Color, byte> kv in ColorToGrayscaleMap)
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{
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var color = kv.Key;
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var grayscale = kv.Value;
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paletteBitmap[index] = grayscale;
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paletteBitmap[index + 1] = grayscale;
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paletteBitmap[index + 2] = grayscale;
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paletteBitmap[index + 3] = 255;
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var alternateIndex = 1;
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foreach (var alternateColorRow in AlternateColorRows)
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{
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for (var j = 0; j < ColorToGrayscaleMap.Count * 4; j += 4)
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{
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paletteBitmap[index + (ColorToGrayscaleMap.Count * alternateIndex)] = alternateColorRow[j];
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paletteBitmap[index + 1 + (ColorToGrayscaleMap.Count * alternateIndex)] = alternateColorRow[j + 1];
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paletteBitmap[index + 2 + (ColorToGrayscaleMap.Count * alternateIndex)] = alternateColorRow[j + 2];
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paletteBitmap[index + 3 + (ColorToGrayscaleMap.Count * alternateIndex)] = alternateColorRow[j + 3];
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}
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alternateIndex += 1;
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}
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index += 4;
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}
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return paletteBitmap;
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}
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}
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}
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