private void status(object sender, SignatureCanvasStatusChangedEventArgs e)
{
if (e.Status == SignatureCanvasStatus.Done)
{
if (attempt == 0)
{
original = canvas.Signature.Value;
}
else
{
SignatureComparisonResult result = Signature.Compare(original, canvas.Signature.Value);
string text;
if (result.IsMatch)
{
text = "Signatures match.";
}
else
{
text = "Signatures do not match.";
for (int i = 0; i < result.Failures.Count; ++i)
{
text += string.Format("Error {0}{1}: {2}", i, result.Failures[i].SegmentIndex == null ? "" : " - Part " + result.Failures[i].SegmentIndex, result.Failures[i].Code.ToString());
}
}
new Message(text).ShowDialog();
++attempt;
}
}
}
public PNG(string fileName)
{
Signature sig = new Signature();
FileStream fileStream = File.OpenRead(fileName);
BinaryReader reader = new BinaryReader(fileStream);
byte[] signature = reader.ReadBytes(8);
Console.WriteLine(sig.Compare(signature) + " - " + sig.ToString());
DataChunks = new List <IDataChunk>();
List <byte[]> allDataBytes = new List <byte[]>();
List <DataChunk> allChunks = new List <DataChunk>();
while ((reader.BaseStream.Position < reader.BaseStream.Length))
{
DataChunk chunk = new DataChunk(reader, this);
ulong chunkLen = CalculateCRCPolynomial((uint)chunk.Data.Length + 4);
if (chunk.DataChunkRepresentation is DataChunk.ImageDataChunkRepresentation)
{
allDataBytes.Add(chunk.Data);
}
else
{
Console.WriteLine($"[{chunk.Length}],[{chunk.ChunkType}],[{chunk.CRC}],[{chunk.Data.Length}]");
if (!string.IsNullOrEmpty(chunk.PropertyString))
{
Console.WriteLine(chunk.PropertyString);
}
DataChunks.Add(chunk);
allChunks.Add(chunk);
}
}
reader.Close();
fileStream.Close();
int allBytesCount = 0;
for (int z = 0; z < allDataBytes.Count; z++)
{
allBytesCount += allDataBytes[z].Length;
}
byte[] dataBytes = new byte[allBytesCount];
allBytesCount = 0;
for (int z = 0; z < allDataBytes.Count; z++)
{
allDataBytes[z].CopyTo(dataBytes, allBytesCount);
allBytesCount += allDataBytes[z].Length;
}
MemoryStream output = new MemoryStream();
MemoryStream memoryStream = new MemoryStream(dataBytes);
memoryStream.Position = 0;
byte[] zlibHeaderBytes = new byte[2];
memoryStream.Read(zlibHeaderBytes, 0, 2);
DeflateStream deflateStream = new DeflateStream(memoryStream, CompressionMode.Decompress);
deflateStream.CopyTo(output);
deflateStream.Flush();
output.Position = 0;
byte[] outputBytes = new byte[output.Length];
int arrLength = (int)output.Length;
output.Read(outputBytes, 0, arrLength);
MemoryStream streamReader = new MemoryStream(outputBytes);
DataChunk header = allChunks.Where(x => x.ChunkType.ToLower() == "ihdr").FirstOrDefault();
Dictionary <string, DataChunk.DataObject> headerProperties = header.DataChunkRepresentation.ToProperties(header.Data);
uint width = (uint)headerProperties["Width"].Value;
uint height = (uint)headerProperties["Height"].Value;
byte colorType = (byte)headerProperties["ColorType"].Value;
byte bitDepth = (byte)headerProperties["BitDepth"].Value;
streamReader.Position = 0;
if (bitDepth <= 8)
{
RGBImage <byte> image = new RGBImage <byte>(width, height);
for (uint y = 0; y < height; y++)
{
byte filterByte = (byte)streamReader.ReadByte();
if (filterByte == 0)
{
if (colorType == 2)
{
for (uint x = 0; x < width; x++)
{
byte r = (byte)streamReader.ReadByte();
byte g = (byte)streamReader.ReadByte();
byte b = (byte)streamReader.ReadByte();
RGBAColor <byte> color = new RGBAColor <byte>(r, g, b, 255);
image.Colors[x, y] = color;
}
}
else if (colorType == 6)
{
for (uint x = 0; x < width; x++)
{
byte r = (byte)streamReader.ReadByte();
byte g = (byte)streamReader.ReadByte();
byte b = (byte)streamReader.ReadByte();
byte a = (byte)streamReader.ReadByte();
RGBAColor <byte> color = new RGBAColor <byte>(r, g, b, a);
image.Colors[x, y] = color;
}
}
}
}
deflateStream.Close();
memoryStream.Close();
output.Close();
streamReader.Close();
Image = image;
}
else if (bitDepth == 16)
{
RGBImage <uint> image = new RGBImage <uint>(width, height);
for (uint y = 0; y < height; y++)
{
byte filterByte = (byte)streamReader.ReadByte();
if (filterByte == 0)
{
if (colorType == 2)
{
for (uint x = 0; x < width; x++)
{
uint r = (uint)streamReader.ReadByte() << 8 | (uint)streamReader.ReadByte();
uint g = (uint)streamReader.ReadByte() << 8 | (uint)streamReader.ReadByte();
uint b = (uint)streamReader.ReadByte() << 8 | (uint)streamReader.ReadByte();
RGBAColor <uint> color = new RGBAColor <uint>(r, g, b, 255);
image.Colors[x, y] = color;
}
}
else if (colorType == 6)
{
for (uint x = 0; x < width; x++)
{
uint r = (uint)streamReader.ReadByte() << 8 | (uint)streamReader.ReadByte();
uint g = (uint)streamReader.ReadByte() << 8 | (uint)streamReader.ReadByte();
uint b = (uint)streamReader.ReadByte() << 8 | (uint)streamReader.ReadByte();
uint a = (uint)streamReader.ReadByte() << 8 | (uint)streamReader.ReadByte();
RGBAColor <uint> color = new RGBAColor <uint>(r, g, b, a);
image.Colors[x, y] = color;
}
}
}
}
deflateStream.Close();
memoryStream.Close();
output.Close();
streamReader.Close();
Image16Bits = image;
}
}