public void Test()
{
var bmp1 = (Bitmap)Image.FromFile(@"C:\Users\FessEmpty\Downloads\parallelprogramming-shpora2016-56f562c98bbf\parallelprogramming-shpora2016-56f562c98bbf\JPEG\sample.bmp");
var bitmapData1 = bmp1.LockBits(new Rectangle(0, 0, bmp1.Width, bmp1.Height), ImageLockMode.ReadOnly, bmp1.PixelFormat);
const int rgpPixelSize = 3;
var additional = bitmapData1.Stride - bitmapData1.Width * rgpPixelSize;
var result = new RgbPixel[bmp1.Height, bmp1.Width];
unsafe
{
var imagePointer = (byte *)bitmapData1.Scan0;
for (var j = 0; j < bitmapData1.Height; j++, imagePointer += additional)
{
for (var i = 0; i < bitmapData1.Width; i++, imagePointer += rgpPixelSize)
{
result[j, i] = new RgbPixel(imagePointer[0], imagePointer[1], imagePointer[2]);
}
}
}
bmp1.UnlockBits(bitmapData1);
var convert = MatrixRgbToYCbCrConveter.Convert(result);
var back = MatrixYCbCrToRgbConverter.Convert(convert);
var bmp2 = new Bitmap(bmp1.Width, bmp1.Height, bmp1.PixelFormat);
var bitmapData2 = bmp2.LockBits(new Rectangle(0, 0, bmp2.Width, bmp2.Height), ImageLockMode.ReadOnly, bmp2.PixelFormat);
unsafe
{
var imagePointer = (byte *)bitmapData2.Scan0;
for (var j = 0; j < bitmapData2.Height; j++, imagePointer += additional)
{
for (var i = 0; i < bitmapData2.Width; i++, imagePointer += rgpPixelSize)
{
imagePointer[0] = back[j, i].R;
imagePointer[1] = back[j, i].G;
imagePointer[2] = back[j, i].B;
}
}
}
bmp2.UnlockBits(bitmapData2);
bmp2.Save(@"C:\Users\FessEmpty\Downloads\parallelprogramming-shpora2016-56f562c98bbf\parallelprogramming-shpora2016-56f562c98bbf\JPEG\sampleTest.bmp", ImageFormat.Bmp);
}
public Bitmap Decompress(CompressedImage compressedImage)
{
var unHuf = HuffmanCodec.Decode(compressedImage.DataBytes, compressedImage.DecodeTable, compressedImage.BitsCount);
var unRle = Rle <byte> .Decode(unHuf).ToArray();
var yDct = new List <double>();
var cbDct = new List <double>();
var crDct = new List <double>();
var countYBlocks = compressedImage.ThinIndex * compressedImage.ThinIndex;
var cellsToBlock = compressedImage.CompressionLevel;
for (var i = 0; i < unRle.Length;)
{
for (var j = 0; j < countYBlocks * cellsToBlock; j++)
{
yDct.Add(unRle[i++]);
}
for (var j = 0; j < cellsToBlock; j++)
{
cbDct.Add(unRle[i++]);
}
for (var j = 0; j < cellsToBlock; j++)
{
crDct.Add(unRle[i++]);
}
}
var yDctBlocks = DevideIntoPiece(yDct, compressedImage.CompressionLevel);
var cbDctBlocks = DevideIntoPiece(cbDct, compressedImage.CompressionLevel);
var crDctBlocks = DevideIntoPiece(crDct, compressedImage.CompressionLevel);
var yChannel = _dctDecompressor.Decompress(yDctBlocks, _dctSize, compressedImage.Height, compressedImage.Width, _lumiaMatrixProvider.GetMatrix());
var thinnedCbChannel = _dctDecompressor.Decompress(cbDctBlocks, _dctSize, compressedImage.Height / compressedImage.ThinIndex, compressedImage.Width / compressedImage.ThinIndex, _colorMatrixProvider.GetMatrix());
var thinnedCrChannel = _dctDecompressor.Decompress(crDctBlocks, _dctSize, compressedImage.Height / compressedImage.ThinIndex, compressedImage.Width / compressedImage.ThinIndex, _colorMatrixProvider.GetMatrix());
var cbChannel = _pieceMatrixExtender.Extend(thinnedCbChannel, compressedImage.ThinIndex);
var crChannel = _pieceMatrixExtender.Extend(thinnedCrChannel, compressedImage.ThinIndex);
var yCbCrChannels = new YCbCrChannels(yChannel, cbChannel, crChannel);
var yCbCrPixels = _iChannelsPacker.Pack(yCbCrChannels, compressedImage.Height, compressedImage.Width);
var matrixRgbPixels = MatrixYCbCrToRgbConverter.Convert(yCbCrPixels);
var bmp = _bitmapBuilder.Build(matrixRgbPixels);
return(bmp);
}
