_GetInt32FromStream
fSignature = _GetInt32FromStream(fStream);
fHeight = _GetInt32FromStream(fStream);
fWidth = _GetInt32FromStream(fStream);
fColorModeDataSize = _GetInt32FromStream(fStream);
fImageResourceSectionSize = _GetInt32FromStream(fStream);
int32 resBlockSignature = _GetInt32FromStream(fStream);
uint32 resSize = _GetInt32FromStream(fStream);
_SkipStreamBlock(fStream, _GetInt32FromStream(fStream));
int32 _GetInt32FromStream(BPositionIO *in);