/// <summary>
/// Reads a binary stream into a LZ77 store
/// </summary>
/// <param name="binaryReader">Reference to the binary reader</param>
/// <param name="colorDepth">Colour depth the image is stored in</param>
/// <returns>LZ77Store array</returns>
public static LZ77Store[] DecodeBinaryStream(ref BinaryReader binaryReader, ColorModel.RGB.ColorDepth colorDepth)
{
var dataList = new List <LZ77Store>();
// Create a bit reader from the base stream of the binaryreader
var bitReader = new BitReader(binaryReader.BaseStream);
// No packed data is the size of a byte, the remaining data will be picked up anyway
while (bitReader.BaseStream.Position < bitReader.BaseStream.Length - 1)
{
// If is long form
if (IsLongForm(ref bitReader))
{
dataList.Add(new LZ77StoreLong <ColorModel.RGB>(
bitReader.ReadByte(),
bitReader.ReadByte()
));
}
// If is short form
else
{
// Calculate length of bits
var colorBitLength = (int)colorDepth / 3;
if (colorDepth == ColorModel.RGB.ColorDepth.Eight)
{
// Add the data item
dataList.Add(new LZ77StoreShort <ColorModel.RGB>(
new ColorModel.RGB(
bitReader.ReadSmallBits(3), 3,
bitReader.ReadSmallBits(3), 3,
bitReader.ReadSmallBits(2), 2,
colorDepth
)
));
}
else
{
// Add the data item
dataList.Add(new LZ77StoreShort <ColorModel.RGB>(
new ColorModel.RGB(
bitReader.ReadSmallBits(colorBitLength), colorBitLength,
bitReader.ReadSmallBits(colorBitLength), colorBitLength,
bitReader.ReadSmallBits(colorBitLength), colorBitLength,
colorDepth
)
));
}
}
}
return(dataList.ToArray());
}
/// <summary>
/// Get the pixel matrix from the data at a specified bit depth
/// </summary>
/// <param name="depth">Bit depth to return the data as</param>
/// <returns>Multidimensional RGB data</returns>
public ColorModel.RGB[,] GetPixelMatrix(ColorModel.RGB.ColorDepth depth)
{
// Copy the data
var copiedData = this.GetDataCopy();
// If the bits match what we have, return the copied data
if (this.data.data[0, 0].bits == depth)
{
return(copiedData);
}
else
{
// Return a converted version
return(copiedData.ConvertAll2D(new Converter <ColorModel.RGB, ColorModel.RGB>(x => x.ToDepth(depth))));
}
}
