public static void saveCompressedFile(byte[] izlaz, string fileName, Bitmap bitmap)
{
StreamWriter sw = new StreamWriter(fileName);
sw.WriteLine(bitmap.Width);
sw.WriteLine(bitmap.Height);
byte[] outByteArray = new byte[izlaz.Length];
int len = ShannonFano.Compress(izlaz, outByteArray, (uint)izlaz.Length);
sw.WriteLine(len);
sw.Close();
FileStream fs = new FileStream(fileName, FileMode.Append);
fs.Write(outByteArray, 0, len);
fs.Close();
}
//opening compressed files
public static Bitmap openCompressedFile()
{
OpenFileDialog o = new OpenFileDialog();
o.Filter = "Compressed files(*.r, *.g, *.b)|*.r;*.g;*.b";
if (DialogResult.OK == o.ShowDialog() && o.FileName != null)
{
StreamReader sr = new StreamReader(o.FileName);
string channel = Path.GetExtension(o.FileName);
int w = Int32.Parse(sr.ReadLine());
int h = Int32.Parse(sr.ReadLine());
int len = Int32.Parse(sr.ReadLine());
sr.Close();
FileStream fs = File.OpenRead(o.FileName);
fs.Seek(3 * sizeof(int) + 5, SeekOrigin.Begin);
byte[] inA = new byte[len];
fs.Read(inA, 0, len);
fs.Close();
byte[] byteArray = new byte[w * h * 2 + ((w % 2 == 1) ? 2 * h : 0)];
ShannonFano.Decompress(inA, byteArray, (uint)len, (uint)(w * h * 2 + ((w % 2 == 1) ? 2 * h : 0)));
Bitmap outB = new Bitmap(w, h);
switch (channel)
{
case ".r":
outB = openR(w, h, byteArray);
break;
case ".g":
outB = openG(w, h, byteArray);
break;
case ".b":
outB = openB(w, h, byteArray);
break;
}
return((Bitmap)outB.Clone());
}
else
{
return(null);
}
}
