/// <summary>
/// Gets the size of a image data.
/// </summary>
/// <returns>
/// Size of a image data.
/// </returns>
protected override int GetSize()
{
if (!this.HandlerState.ContainsKey("TIFFSIZE"))
{
int _size = 0;
for (Tiff.Ifd _idf = this.ImageFileDirectory; _idf != null; _idf = _idf.NextIfd)
{
if (_idf.Offset + _idf.Size > _size)
{
_size = _idf.Offset + _idf.Size;
}
Tiff.IfdEntry _stripOffsetsTag = null, _stripByteCountsTag = null;
Tiff.IfdEntry _freeOffsets = null, _freeByteCounts = null;
Tiff.IfdEntry _tileOffsets = null, _tileByteCounts = null;
foreach (IfdEntry _entry in _idf)
{
if (_entry.DataOffset + _entry.DataSize > _size)
{
_size = _entry.DataOffset + _entry.DataSize;
}
switch (_entry.Tag)
{
case TiffTags.STRIPOFFSETS:
_stripOffsetsTag = _entry;
break;
case TiffTags.STRIPBYTECOUNTS:
_stripByteCountsTag = _entry;
break;
case TiffTags.FREEOFFSETS:
_freeOffsets = _entry;
break;
case TiffTags.FREEBYTECOUNTS:
_freeByteCounts = _entry;
break;
case TiffTags.TILEOFFSETS:
_tileOffsets = _entry;
break;
case TiffTags.TILEBYTECOUNTS:
_tileByteCounts = _entry;
break;
}
}
foreach (IfdEntry[] _item in new Tiff.IfdEntry[][] { new[] { _stripOffsetsTag, _stripByteCountsTag }, new[] { _freeOffsets, _freeByteCounts }, new[] { _tileOffsets, _tileByteCounts } })
{
if (_item[0] != null && _item[1] != null && _item[0].Length == _item[1].Length)
{
for (int i = 0; i < _item[0].Length; i++)
{
int _dataOffset = Convert.ToInt32(_item[0][i]);
int _dataSize = Convert.ToInt32(_item[1][i]);
if (_dataOffset + _dataSize > _size)
{
_size = _dataOffset + _dataSize;
}
}
}
}
}
this.HandlerState.Add("TIFFSIZE", _size);
}
return((int)this.HandlerState["TIFFSIZE"]);
}
public static Tiff.Ifd FromPtr(IntPtr ptr, IntPtr baseAddr)
{
Tiff.Ifd _idf = new Tiff.Ifd();
_idf.Load(ptr, baseAddr);
return(_idf);
}