public TagInfo(byte[] buffer, BitConvert bit)
{
TagId = bit.ToUInt16(buffer, 0);
TagType = (TagType)(bit.ToInt16(buffer, 2));
Count = bit.ToUInt32(buffer, 4);
ValuePointer = bit.ToUInt32(buffer, 8);
}
private void ReadHeader(IIoStream stream)
{
var marker = new byte[2];
stream.Read(marker, marker.Length, 0);
if (!marker.SequenceEqual(HeaderMarker1))
{
throw new ImageFormatInvalid();
}
stream.Read(marker, marker.Length, 2);
while (true)
{
if (marker.SequenceEqual(HeaderMarker2))
{
break;
}
try
{
stream.Read(marker, marker.Length);
}
catch (Exception)
{
throw new ImageFormatInvalid();
}
}
stream.Read(marker, marker.Length);
var app0 = _bit.ToUInt16(marker, 0);
var header = new byte[8];
stream.Read(header, 6);
var p = stream.Position;
stream.Read(header, header.Length);
if ((char)header[0] == 'I' && (char)header[1] == 'I')
{
_bit = new BitConvert(true);
}
else if ((char)header[0] == 'M' && (char)header[1] == 'M')
{
_bit = new BitConvert(false);
}
else
{
throw new ImageFormatInvalid();
}
if (_bit.ToInt16(header, 0x0002) != 0x002a)
{
throw new ImageFormatInvalid();
}
stream.StartOffset = p;
_tiffOffset = _bit.ToUInt32(header, 0x0004);
}
public override bool Resolve(TagInfo info, IIoStream imageStream, BitConvert bit)
{
var r = new ushort[info.Count];
var buffer = new byte[info.Count * 2];
imageStream.Read(buffer, buffer.Length, info.ValuePointer);
for (var i = 0; i < info.Count; i++)
{
r[i] = bit.ToUInt16(buffer, i * 2);
}
Value = r;
return(true);
}