private void ReadIfds(IIoStream stream, uint ifdOffset)
{
var ptr = ifdOffset;
while (ptr > 0 && ptr < stream.Length)
{
try
{
var ifd = new ImageFileDirectory(ptr);
var buffer = new byte[12];
stream.Read(buffer, 2, ptr);
var offset = ptr + 2;
var size = _bit.ToInt16(buffer, 0);
for (var i = 0; i < size; i++)
{
var currOffset = offset + i * 12;
stream.Read(buffer, 12, currOffset);
ifd.AddTag(buffer, _bit, stream);
}
stream.Read(buffer, 4, offset + size * 12);
ptr = _bit.ToUInt32(buffer, 0);
if (ifd.Tags.Any())
{
_ifds.Add(ifd);
}
}
catch (Exception)
{
break;
}
}
}
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);
}
public override bool Resolve(TagInfo info, IIoStream imageStream, BitConvert bit)
{
var buffer = new byte[8];
imageStream.Read(buffer, buffer.Length, info.ValuePointer);
Value = (decimal)bit.ToUInt32(buffer, 0) / (decimal)bit.ToUInt32(buffer, 4);
return(true);
}
private void ReadIfds(IIoStream stream, uint ifdOffset)
{
var ptr = ifdOffset;
while (ptr > 0)
{
var ifd = new ImageFileDirectory(ptr);
_ifds.Add(ifd);
var buffer = new byte[12];
stream.Read(buffer, 2, ptr);
var offset = ptr + 2;
var size = _bit.ToInt16(buffer, 0);
for (var i = 0; i < size; i++)
{
var currOffset = offset + i * 12;
stream.Read(buffer, 12, currOffset);
ifd.AddTag(buffer, _bit, stream);
}
stream.Read(buffer, 4, offset + size * 12);
ptr = _bit.ToUInt32(buffer, 0);
}
}