public static List <int> Compress(Color[,] colors, Color[] table, int tableSize)
{
List <int> codeStream = new List <int>();
List <int> indexStream = colors.Cast <Color>()
.Select(x => Array.FindIndex(table, y =>
y.B == x.B &&
y.R == x.R &&
y.G == x.G)).ToList();
Initialize(tableSize);
codeStream.Add(tableSize);
List <int> buffer = new List <int>()
{
indexStream[0]
};
for (int i = 1; i < indexStream.Count; i++)
{
List <int> code = new List <int>()
{
indexStream[i]
};
List <int> bufferWithCode = buffer.Concat(code).ToList();
if (_dictionary.Values.Any(x => x.SequenceEqual(bufferWithCode)))
{
buffer = bufferWithCode;
}
else
{
_dictionary.Add(_dictionary.Count, bufferWithCode);
codeStream.Add(GetCode(buffer));
if (_dictionary.Count == MaxDictionarySize)
{
Initialize(tableSize);
codeStream.Add(tableSize);
buffer = new List <int>()
{
indexStream[i]
};
continue;
}
buffer = code;
}
}
codeStream.Add(GetCode(buffer));
codeStream.Add(_dictionary[tableSize + 1].First());
return(codeStream);
}
private static Color[] GetTable(Color[,] colors)
{
Color[] result = colors.Cast <Color>().ToArray();
return(result.GroupBy(x => new { x.R, x.G, x.B })
.Select(x => new Color()
{
R = x.Key.R,
G = x.Key.G,
B = x.Key.B
}).ToArray());
}
public Color CalculateAverageColorArr(Color[,] colors)
{
return(CalculateAverageColor(colors.Cast <Color>()));
}
public override int GetHashCode()
{
return(Utils.GetHashCode(Position.Concat(Colors.Cast <int>())));
}