private static CciHeader IntepretBinHeader(byte[] headerData)
{
var cciHeader = new CciHeader();
cciHeader.X = (ushort)((headerData[0] << 8) + headerData[1]);
cciHeader.Y = headerData[2];
return(cciHeader);
}
public void PerformNibbleCompression(string filePath)
{
Data = File.ReadAllBytes(filePath);
//extract the first 3 bytes as X,Y size information. This is needed for the destination compressed format
const int binFileHeaderSize = 3;
var headerData = Data.Take(binFileHeaderSize).ToArray();
CompressedFileHeader = IntepretBinHeader(headerData);
Data = Data.Skip(binFileHeaderSize).ToArray();
CreateCompressedNibbleData();
var compressedDataBytes = CompressData.Count;
Console.WriteLine("Compressed Data: {0} bytes", compressedDataBytes);
const int paletteSize = 3 * 16;
Console.WriteLine("Palette Data: {0} bytes", paletteSize);
Console.WriteLine("All Data: {0} bytes", compressedDataBytes + paletteSize);
// write all data to output file
var fullPath = Path.GetFullPath(filePath);
outputFileName = Path.GetDirectoryName(fullPath) + "\\" + Path.GetFileNameWithoutExtension(fullPath) + ".cci";
var outputFileData = new List <byte>();
var outputBytes = ConvertCompressNibbleDataToBytes().ToList();
CompressedFileHeader.FileSize = (ushort)(outputBytes.Count);
outputFileData.AddRange(CompressedFileHeader.GetRawRepresentation());
outputFileData.AddRange(outputBytes);
File.WriteAllBytes(outputFileName, outputFileData.ToArray());
// make reference decompresssion and compare result
var refimage = ReferenceNibbleDecompressImage();
if (refimage.Count != Data.Length)
{
Console.WriteLine("incorrect size of reference decompression!");
}
for (int i = 0; i < refimage.Count; i++)
{
if (refimage[i] != Data[i])
{
Console.WriteLine("Data error! Not same data in reference decompression at {0}!", i);
return;
}
}
Console.WriteLine("Exact match of reference data!");
}