public void SaveCompressedClick()
{
Downsampling d = new Downsampling(this.model.getMainImage());
DownsampleFormat df = d.Downsample(1);
Utilities.SaveCompressed(df);
}
public static Bitmap DecompressHuffman(string imgSrc)
{
//moram da pocnem odmah otvaranjem fajla i ucitavanjem bajtova redom kako su upisivani
byte[] bmpWidth;
byte[] bmpHeight;
byte[] stride;
byte[] downsampleChannels;
byte[] dictionarySize;
byte[] dictionary;
byte[] YDataLen;
byte[] CbDataLen;
byte[] CrDataLen;
byte[] imageData;
HuffmanTree tree = new HuffmanTree();
using (var reader = new BinaryReader(File.Open(imgSrc, FileMode.Open)))
{
bmpWidth = reader.ReadBytes(4);
bmpHeight = reader.ReadBytes(4);
stride = reader.ReadBytes(4);
downsampleChannels = reader.ReadBytes(4);
YDataLen = reader.ReadBytes(4);
CbDataLen = reader.ReadBytes(4);
CrDataLen = reader.ReadBytes(4);
dictionarySize = reader.ReadBytes(4);
int dictSize = BitConverter.ToInt32(dictionarySize, 0);
dictionary = reader.ReadBytes(dictSize);
tree.DeserializeDictionary(dictionary);
List <byte> compressedData = new List <byte>();
while (reader.BaseStream.Position != reader.BaseStream.Length)
{
compressedData.Add(reader.ReadByte());
}
imageData = tree.Decode(new BitArray(compressedData.ToArray()));
}
int width = BitConverter.ToInt32(bmpWidth, 0);
int height = BitConverter.ToInt32(bmpHeight, 0);
int strideInt = BitConverter.ToInt32(stride, 0);
int downampleChannelsInt = BitConverter.ToInt32(downsampleChannels, 0);
int yDataLen = BitConverter.ToInt32(YDataLen, 0);
int cbDataLen = BitConverter.ToInt32(CbDataLen, 0);
int crDataLen = BitConverter.ToInt32(CrDataLen, 0);
DownsampleFormat format = new DownsampleFormat(strideInt, width, height, yDataLen, cbDataLen, crDataLen, downampleChannelsInt);
format.data = imageData;
Downsampling sampling = new Downsampling();
return(sampling.RestoreBitmap(format));
}
public static void SaveCompressed(DownsampleFormat format)
{
SaveFileDialog dialog = new SaveFileDialog();
string path = AppDomain.CurrentDomain.BaseDirectory;
dialog.InitialDirectory = path;
dialog.RestoreDirectory = true;
dialog.Filter = "MM Huffman's compressed file(*.mmc) |";
if (DialogResult.OK == dialog.ShowDialog())
{
CompressHuffman(format, dialog.FileName);
}
else
{
MessageBox.Show("Error saving file.");
}
}
public static void CompressHuffman(DownsampleFormat format, string dest)
{
DownsampleFormat downFormat = format;
byte[] data = new byte[format.Ylen + format.Cblen + format.Crlen];
format.data.CopyTo(data, 0);
HuffmanTree tree = new HuffmanTree();
tree.CreateTree(tree.GenerateListOfNodes(data));
byte[] decompressDict = tree.SerializeDictionaryToBytes();
byte[] dictionarySize = BitConverter.GetBytes(decompressDict.Length); //svaki integer ima duzinu od 4 bajta u C#
byte[] bmpWidth = BitConverter.GetBytes(format.bmpWidth); //4 bajta
byte[] bmpHeight = BitConverter.GetBytes(format.bmpHeight); //4 bajta
byte[] stride = BitConverter.GetBytes(format.bmpStride); //4 bajta
byte[] downsampleChannels = BitConverter.GetBytes(format.code); //4 bajta
byte[] YDataLen = BitConverter.GetBytes(format.Ylen); //4 bajta
byte[] CbDataLen = BitConverter.GetBytes(format.Cblen); //4 bajta
byte[] CrDataLen = BitConverter.GetBytes(format.Crlen); //4 bajta
using (var writer = new FileStream(dest, FileMode.Create))
{
writer.Write(bmpWidth, 0, bmpWidth.Length);
writer.Write(bmpHeight, 0, bmpHeight.Length);
writer.Write(stride, 0, stride.Length);
writer.Write(downsampleChannels, 0, downsampleChannels.Length);
writer.Write(YDataLen, 0, YDataLen.Length);
writer.Write(CbDataLen, 0, CbDataLen.Length);
writer.Write(CrDataLen, 0, CrDataLen.Length);
writer.Write(dictionarySize, 0, dictionarySize.Length);
writer.Write(decompressDict, 0, decompressDict.Length);
byte[] allData = BitArrayToByteArray(tree.Encode(data));
writer.Write(allData, 0, allData.Length);
}
}
public void DownsampleClick()
{
this.channelsOn = true;
this.view.MakeChannelsVisible();
Downsampling down = new Downsampling(this.model.getMainImage());
DownsampleFormat df1 = down.Downsample(1);
DownsampleFormat df2 = down.Downsample(2);
DownsampleFormat df3 = down.Downsample(2);
//Compression.DownsamplingNew.Downsampling down = new Compression.DownsamplingNew.Downsampling(this.model.getMainImage());
//Compression.DownsamplingNew.DownsampleFormat df1 = down.DownsampleImage("YCb");
//Compression.DownsamplingNew.DownsampleFormat df2 = down.DownsampleImage("CbCr");
//Compression.DownsamplingNew.DownsampleFormat df3 = down.DownsampleImage("YCr");
this.model.setYChannel(down.RestoreBitmap(df1));
this.model.setCbChannel(down.RestoreBitmap(df2));
this.model.setCrChannel(down.RestoreBitmap(df3));
this.view.ShowImages(model.getMainImage(), model.getYChannel(), model.getCbChannel(), model.getCrChannel(), model.getImageName());
}
