void PrepareHeader(KgdMetaData info)
{
Buffer.BlockCopy(PngFormat.HeaderBytes, 0, m_buffer, 0, 8);
BigEndian.Pack(0x0D, m_buffer, 8);
BigEndian.Pack(0x49484452, m_buffer, 0x0C); // 'IHDR'
BigEndian.Pack(info.Width, m_buffer, 0x10);
BigEndian.Pack(info.Height, m_buffer, 0x14);
m_buffer[0x18] = info.BitsPerPlane;
m_buffer[0x19] = info.ColorType;
uint checksum = Adler32.Compute(m_buffer, 0x10, 0x0D);
BigEndian.Pack(checksum, m_buffer, 0x1D);
m_buffer_size = 0x21;
}
public PngRestoreStream(IBinaryStream input, KgdMetaData info) : base(input.AsStream, true)
{
m_input = input;
PrepareHeader(info);
m_input.Position = 0x19;
}