internal WCSInfo(HDU hdu)
{
_hdu = hdu;
// create primary transformation
_primaryTransformation = new Transformation(this, true);
// allocate 26 possible transformations. Those missing from the header will be null.
_transformations = new Transformation[26];
// map to convert an index to its alternative letter
_index2LetterMap = new char[26];
_numAlternatives = 0;
}
internal HDUTable(HDU hdu, TableType type, long numRows, int numFields, long bytesPerRow)
{
_hdu = hdu;
_type = type;
_numRows = numRows;
_bytesPerRow = bytesPerRow;
_data = null;
// IMPORTANT: TableHeader must be constructed after setting the type of the table
// this is because it will call HDUTable and get the type to decide
// what kind of IFieldInfo & ITableCell implementation to use
_header = new TableHeader(this, numFields);
}
private void Load(FileStream fs)
{
// is it empty?
///////////////////////////////////////////////////////////////////
Utils.CheckBool(fs.Length != 0, "File is empty");
// loop to read all HDUs
///////////////////////////////////////////////////////////////////
_curHDUPosiotion = 0;
while (fs.Position < fs.Length)
{
// load this hdu
HDU hdu = new HDU(this, _curHDUPosiotion++);
hdu.Load(fs);
// if we didn't read any card images in this HDU - which means the first card image in the header
// is empty, leave at this point
if (hdu.CardImages.Length == 0)
{
break;
}
// add it to our array. do this early so we can free later with array
_hdus.Add(hdu);
// keep a map of name index as well
if (!string.IsNullOrEmpty(hdu.Name) && !_hduIndexMap.ContainsKey(hdu.Name))
{
_hduIndexMap.Add(hdu.Name, _hdus.Count - 1);
}
// seek past the data of this hdu to prepare for loading next one
if (hdu.RawDataSize != 0)
{
long recordsLess = hdu.RawDataSize % (36 * 80);
if (recordsLess > 0)
{
long dataPadding = 36 * 80 - recordsLess;
fs.Seek(dataPadding, SeekOrigin.Current);
}
}
}
}
public DataManager(HDU hdu, byte[] data, int bitsPerPixel, double blank, int numSlices)
{
// init things
///////////////////////////////////////////////////////////////////////////////////////////////////////////
_hdu = hdu;
_rawData = data;
_bitsPerPixel = bitsPerPixel;
_elementSize = (bitsPerPixel > 0) ? (bitsPerPixel / 8) : (-bitsPerPixel / 8); // in bytes
_blank = blank;
// create slies
///////////////////////////////////////////////////////////////////////////////////////////////////////////
long numElements = (long)data.Length / numSlices / _elementSize;
_slices = new List <ISlice>(numSlices);
for (int i = 0; i < numSlices; i++)
{
long offset = i * numElements * _elementSize;
_slices.Add(new Slice(data, offset, numElements, _elementSize, bitsPerPixel, blank));
}
}
