private static Tiff FromPtr(IntPtr ptr)
{
Tiff _tiff = new Tiff {
_header = (TiffHeader)Marshal.PtrToStructure(ptr, typeof(TiffHeader))
};
if (_tiff._header.magic == MagicValues.BigEndian)
{
throw new NotSupportedException();
}
_tiff._ifd = Ifd.FromPtr((IntPtr)(ptr.ToInt64() + _tiff._header.dirOffset), ptr);
return(_tiff);
}
private void Load(IntPtr ptr, IntPtr baseAddr)
{
ushort _count = (ushort)Marshal.PtrToStructure(ptr, typeof(ushort));
IntPtr _ptr = (IntPtr)(ptr.ToInt64() + sizeof(ushort));
for (int i = 0, _size = Marshal.SizeOf(typeof(TiffDirEntry)); i < _count; i++, _ptr = (IntPtr)(_ptr.ToInt64() + _size))
{
this.Add(Tiff.IfdEntry.FromPtr(_ptr, baseAddr));
}
int _nextIdfOffset = (int)Marshal.PtrToStructure(_ptr, typeof(int));
if (_nextIdfOffset != 0)
{
this.NextIfd = Ifd.FromPtr((IntPtr)(baseAddr.ToInt64() + _nextIdfOffset), baseAddr);
}
this.Offset = (int)(ptr.ToInt64() - baseAddr.ToInt64());
this.Size = 6 + Marshal.SizeOf(typeof(Tiff.TiffDirEntry)) * _count;
}