private void readChunk()
{
ulong len = readInt();
String type = readType();
byte[] buffer = new byte[len];
_stream.Read(buffer, 0, (int)len);
ulong crc = readInt();
if (crc != CalcCRC(type, buffer))
{
Console.WriteLine("CRC Don't match! {0} {1:X}:{2:X}", type, crc, CalcCRC(type, buffer));
}
PNGChunk pc = new PNGChunk() { Type = type, Data = buffer, CRC = crc };
_chunks.Add(pc.Type, pc);
_chunkOrder.Add(pc.Type);
}
public void Save(Stream Stream)
{
Stream.Write(_header, 0, 8);
foreach (String type in _chunkOrder)
{
PNGChunk chunk = _chunks[type];
WriteLong(Stream, (ulong)chunk.Data.Length);
Stream.WriteByte((byte)type[0]);
Stream.WriteByte((byte)type[1]);
Stream.WriteByte((byte)type[2]);
Stream.WriteByte((byte)type[3]);
Stream.Write(chunk.Data, 0, chunk.Data.Length);
WriteLong(Stream, chunk.CRC);
}
Stream.Close();
}
private void readChunk()
{
ulong len = readInt();
String type = readType();
byte[] buffer = new byte[len];
_stream.Read(buffer, 0, (int)len);
ulong crc = readInt();
if (crc != CalcCRC(type, buffer))
{
Console.WriteLine("CRC Don't match! {0} {1:X}:{2:X}", type, crc, CalcCRC(type, buffer));
}
PNGChunk pc = new PNGChunk()
{
Type = type, Data = buffer, CRC = crc
};
_chunks.Add(pc.Type, pc);
_chunkOrder.Add(pc.Type);
}
