/// <summary>
/// Returns singletone instance
/// </summary>
/// <returns>Instance</returns>
public static GZIP GetInstance()
{
if (_instance == null)
{
_instance = new GZIP();
}
return(_instance);
}
/// <summary>
/// Forward application of the algorithm
/// </summary>
/// <param name="parOriginalImage">Original image stream</param>
/// <param name="parArguments">List of an arguments (long qualityLevel, ImageFormat interimFormat)</param>
/// <returns>Compressed image stream</returns>
public override Stream CompressImage(Stream parOriginalImage, List <object> parArguments)
{
Bitmap original = new Bitmap(parOriginalImage);
int originalWidth = original.Width;
int originalHeight = original.Height;
int moddedWidth = (originalWidth + 1) / 2;
int moddedHeight = originalHeight;
byte lastColumnIsOdd = (byte)(originalWidth % 2);
Bitmap modded = new Bitmap(moddedWidth, moddedHeight, original.PixelFormat);
BitmapData bdOriginal = original.LockBits(new Rectangle(0, 0, originalWidth, originalHeight),
ImageLockMode.ReadOnly,
PixelFormat.Format32bppArgb);
int[] bitsOriginal = new int[originalWidth * originalHeight];
Marshal.Copy(bdOriginal.Scan0, bitsOriginal, 0, bitsOriginal.Length);
// --/--
BitmapData bdModded = modded.LockBits(new Rectangle(0, 0, moddedWidth, moddedHeight),
ImageLockMode.ReadWrite,
PixelFormat.Format32bppArgb);
int[] bitsModded = new int[moddedWidth * moddedHeight];
Marshal.Copy(bdModded.Scan0, bitsModded, 0, bitsModded.Length);
for (int i = 0; i < moddedHeight; i += 2)
{
for (int j = 0; j < moddedWidth; j++)
{
bitsModded[i * moddedWidth + j] = bitsOriginal[i * moddedWidth * 2 + j * 2];
if ((j * 2 + 1) < originalWidth)
{
bitsModded[(i + 1) * moddedWidth + j] = bitsOriginal[(i + 1) * moddedWidth * 2 + j * 2 + 1];
}
}
}
Marshal.Copy(bitsModded, 0, bdModded.Scan0, bitsModded.Length);
original.UnlockBits(bdOriginal);
modded.UnlockBits(bdModded);
Stream interlacedImage = new MemoryStream();
ImageFormat format = (ImageFormat)parArguments[1];
modded.Save(interlacedImage, format);
interlacedImage.WriteByte(lastColumnIsOdd);
GZIP gzip = GZIP.GetInstance();
int compressionLevel = (int)parArguments[0];
Stream compressedImage = gzip.CompressImage(interlacedImage, new List <object>()
{
compressionLevel
});
return(compressedImage);
}
/// <summary>
/// Inverse application of the algorithm
/// </summary>
/// <param name="parCompressedImage">Compressed image stream</param>
/// <param name="parArguments">List of an arguments (ImageFormat finalFormat)</param>
/// <returns>Decompressed image stream</returns>
public override Stream DecompressImage(Stream parCompressedImage, List <object> parArguments)
{
GZIP gzip = GZIP.GetInstance();
Stream decompressedWavelet = gzip.DecompressImage(parCompressedImage, new List <object>());
Bitmap wavelet = new Bitmap(decompressedWavelet);
int levels = (int)parArguments[0];
HaarWavelet.ApplyTransform(ref wavelet, false, levels);
Stream result = new MemoryStream();
ImageFormat format = (ImageFormat)parArguments[1];
wavelet.Save(result, format);
return(result);
}
/// <summary>
/// Forward application of the algorithm
/// </summary>
/// <param name="parOriginalImage">Original image stream</param>
/// <param name="parArguments">List of an arguments (long qualityLevel, ImageFormat interimFormat)</param>
/// <returns>Compressed image stream</returns>
public override Stream CompressImage(Stream parOriginalImage, List <object> parArguments)
{
Bitmap original = new Bitmap(parOriginalImage);
int levels = (int)parArguments[0];
HaarWavelet.ApplyTransform(ref original, true, levels);
Stream waveletStream = new MemoryStream();
ImageFormat format = (ImageFormat)parArguments[2];
original.Save(waveletStream, format);
GZIP gzip = GZIP.GetInstance();
int compressionLevel = (int)parArguments[1];
Stream compressedImage = gzip.CompressImage(waveletStream, new List <object>()
{
compressionLevel
});
return(compressedImage);
}
/// <summary>
/// Inverse application of the algorithm
/// </summary>
/// <param name="parCompressedImage">Compressed image stream</param>
/// <param name="parArguments">List of an arguments (ImageFormat finalFormat)</param>
/// <returns>Decompressed image stream</returns>
public override Stream DecompressImage(Stream parCompressedImage, List <object> parArguments)
{
GZIP gzip = GZIP.GetInstance();
Stream interlacedImage = gzip.DecompressImage(parCompressedImage, new List <object>());
interlacedImage.Position = interlacedImage.Length - 1;
bool lastColumnIsOdd = interlacedImage.ReadByte() > 0;
interlacedImage.SetLength(interlacedImage.Length - 1);
Bitmap interlaced = new Bitmap(interlacedImage);
int interlacedWidth = interlaced.Width;
int interlacedHeight = interlaced.Height;
int reconstructedWidth = interlacedWidth * 2;
int reconstructedHeight = interlacedHeight;
if (lastColumnIsOdd)
{
reconstructedWidth--;
}
Bitmap reconstructed = new Bitmap(reconstructedWidth, reconstructedHeight, interlaced.PixelFormat);
BitmapData bdInterlaced = interlaced.LockBits(new Rectangle(0, 0, interlacedWidth, interlacedHeight),
ImageLockMode.ReadOnly,
PixelFormat.Format32bppArgb);
int[] bitsInterlaced = new int[interlacedWidth * interlacedHeight];
Marshal.Copy(bdInterlaced.Scan0, bitsInterlaced, 0, bitsInterlaced.Length);
// --/--
BitmapData bdReconstructed = reconstructed.LockBits(new Rectangle(0, 0, reconstructedWidth, reconstructedHeight),
ImageLockMode.ReadWrite,
PixelFormat.Format32bppArgb);
int[] bitsReconstructed = new int[reconstructedWidth * reconstructedHeight];
Marshal.Copy(bdReconstructed.Scan0, bitsReconstructed, 0, bitsReconstructed.Length);
for (int i = 0; i < interlacedHeight; i += 2)
{
for (int j = 0; j < interlacedWidth; j++)
{
bitsReconstructed[i * reconstructedWidth + j * 2] = bitsInterlaced[i * interlacedWidth + j];
if ((j * 2 + 1) < reconstructedWidth)
{
bitsReconstructed[(i + 1) * reconstructedWidth + j * 2 + 1] = bitsInterlaced[(i + 1) * interlacedWidth + j];
}
}
}
for (int i = 0; i < interlacedHeight; i++)
{
int offset = (i + 1) % 2;
for (int j = offset; j < reconstructedWidth; j += 2)
{
List <int> pixels = new List <int>();
if (i > 0)
{
pixels.Add(bitsReconstructed[(i - 1) * reconstructedWidth + j]);
}
if ((i + 1) < interlacedHeight)
{
pixels.Add(bitsReconstructed[(i + 1) * reconstructedWidth + j]);
}
if (j > 0)
{
pixels.Add(bitsReconstructed[i * reconstructedWidth + j - 1]);
}
if ((j + 1) < reconstructedWidth)
{
pixels.Add(bitsReconstructed[i * reconstructedWidth + j + 1]);
}
bitsReconstructed[i * reconstructedWidth + j] = FindAverageColor(pixels);
}
}
Marshal.Copy(bitsReconstructed, 0, bdReconstructed.Scan0, bitsReconstructed.Length);
interlaced.UnlockBits(bdInterlaced);
reconstructed.UnlockBits(bdReconstructed);
Stream reconstructedImage = new MemoryStream();
ImageFormat format = (ImageFormat)parArguments[0];
reconstructed.Save(reconstructedImage, format);
return(reconstructedImage);
}
/// <summary>
/// Inverse application of the algorithm
/// </summary>
/// <param name="parCompressedImage">Compressed image stream</param>
/// <param name="parArguments">List of an arguments (ImageFormat finalFormat)</param>
/// <returns>Decompressed image stream</returns>
public override Stream DecompressImage(Stream parCompressedImage, List <object> parArguments)
{
GZIP gzip = GZIP.GetInstance();
Stream interlacedImage = gzip.DecompressImage(parCompressedImage, new List <object>());
interlacedImage.Position = interlacedImage.Length - 1;
bool lastRowIsOdd = interlacedImage.ReadByte() > 0;
interlacedImage.SetLength(interlacedImage.Length - 1);
Bitmap interlaced = new Bitmap(interlacedImage);
int reconstructedWidth = interlaced.Width;
int reconstructedHeight = interlaced.Height * 2;
if (lastRowIsOdd)
{
reconstructedHeight--;
}
Bitmap reconstructed = new Bitmap(reconstructedWidth, reconstructedHeight, interlaced.PixelFormat);
BitmapData bdInterlaced = interlaced.LockBits(new Rectangle(0, 0, interlaced.Width, interlaced.Height),
ImageLockMode.ReadOnly,
PixelFormat.Format32bppArgb);
int[] bitsInterlaced = new int[bdInterlaced.Stride / 4 * bdInterlaced.Height];
Marshal.Copy(bdInterlaced.Scan0, bitsInterlaced, 0, bitsInterlaced.Length);
// --/--
BitmapData bdReconstructed = reconstructed.LockBits(new Rectangle(0, 0, reconstructed.Width, reconstructed.Height),
ImageLockMode.ReadWrite,
PixelFormat.Format32bppArgb);
int[] bitsReconstructed = new int[bdReconstructed.Stride / 4 * bdReconstructed.Height];
Marshal.Copy(bdReconstructed.Scan0, bitsReconstructed, 0, bitsReconstructed.Length);
int interlacedWidth = interlaced.Width;
int interlacedHeight = interlaced.Height;
for (int j = 0; j < interlacedWidth; j++)
{
for (int i = 0; i < interlacedHeight - 1; i++)
{
bitsReconstructed[i * interlacedWidth * 2 + j] = bitsInterlaced[i * interlacedWidth + j];
bitsReconstructed[(i * 2 + 1) * interlacedWidth + j] =
this.FindAverageColor(bitsInterlaced[i * interlacedWidth + j], bitsInterlaced[(i + 1) * interlacedWidth + j]);
}
bitsReconstructed[(interlacedHeight - 1) * 2 * interlacedWidth + j] = bitsInterlaced[(interlacedHeight - 1) * interlacedWidth + j];
if (!lastRowIsOdd)
{
bitsReconstructed[(reconstructedHeight - 1) * interlacedWidth + j] = bitsInterlaced[(interlacedHeight - 1) * interlacedWidth + j];
}
}
Marshal.Copy(bitsReconstructed, 0, bdReconstructed.Scan0, bitsReconstructed.Length);
interlaced.UnlockBits(bdInterlaced);
reconstructed.UnlockBits(bdReconstructed);
Stream reconstructedImage = new MemoryStream();
ImageFormat format = (ImageFormat)parArguments[0];
reconstructed.Save(reconstructedImage, format);
return(reconstructedImage);
}
/// <summary>
/// Main form constructor
/// </summary>
public MainForm()
{
InitializeComponent();
_panels = new Hashtable();
_panels.Add(panelQuality, new List <string>()
{
"JPEG"
});
_panels.Add(panelCompression, new List <string>()
{
"TIFF"
});
_panels.Add(panelWaveletLevels, new List <string>()
{
"Wavelet+GZIP"
});
_panels.Add(panelCompressionLevel, new List <string>()
{
"GZIP",
"HInterlacing+GZIP",
"VInterlacing+GZIP",
"XInterlacing+GZIP",
"Wavelet+GZIP"
});
_panels.Add(panelInterimFormat, new List <string>()
{
"HInterlacing+GZIP",
"VInterlacing+GZIP",
"XInterlacing+GZIP",
"Wavelet+GZIP"
});
_panels.Add(panelFinalFormat, new List <string>()
{
"HInterlacing+GZIP",
"VInterlacing+GZIP",
"XInterlacing+GZIP",
"Wavelet+GZIP"
});
cmbAlgorithm.Items.Clear();
cmbAlgorithm.Items.Add(JPEG.GetInstance());
cmbAlgorithm.Items.Add(PNG.GetInstance());
cmbAlgorithm.Items.Add(TIFF.GetInstance());
cmbAlgorithm.Items.Add(GZIP.GetInstance());
cmbAlgorithm.Items.Add(HInterlacingWithGZIP.GetInstance());
cmbAlgorithm.Items.Add(VInterlacingWithGZIP.GetInstance());
cmbAlgorithm.Items.Add(XInterlacingWithGZIP.GetInstance());
cmbAlgorithm.Items.Add(WaveletWithGZIP.GetInstance());
cmbAlgorithm.SelectedIndex = 0;
cmbCompression.Items.Clear();
cmbCompression.Items.Add("Default");
cmbCompression.Items.Add("None");
cmbCompression.Items.Add("CCITT3");
cmbCompression.Items.Add("CCITT4");
cmbCompression.Items.Add("LZW");
cmbCompression.Items.Add("RLE");
cmbCompression.Items.Add("ZIP");
cmbCompression.Items.Add(".NET default");
cmbCompression.SelectedIndex = 7;
cmbCompressionLevel.Items.Clear();
cmbCompressionLevel.Items.Add("Optimal");
cmbCompressionLevel.Items.Add("Fast");
cmbCompressionLevel.Items.Add("None");
cmbCompressionLevel.SelectedIndex = 0;
cmbInterimFormat.Items.Clear();
cmbInterimFormat.Items.Add(ImageFormat.Bmp);
cmbInterimFormat.Items.Add(ImageFormat.Png);
cmbInterimFormat.Items.Add(ImageFormat.Tiff);
cmbInterimFormat.SelectedIndex = 0;
cmbFinalFormat.Items.Clear();
cmbFinalFormat.Items.Add(ImageFormat.Bmp);
cmbFinalFormat.Items.Add(ImageFormat.Png);
cmbFinalFormat.Items.Add(ImageFormat.Tiff);
cmbFinalFormat.SelectedIndex = 0;
_resultExtension = null;
}
