void CompressedFitsWriter::copyTransposeTile ( uint32_t  index )

private

Copy and transpose (or semi-transpose) one tile of data.

Definition at line 1167 of file fitsCompressor.cc.

References CompressedFitsFile::_buffer, CompressedFitsFile::_columns, CompressedFitsFile::_numRowsPerTile, CompressedFitsFile::_rowWidth, CompressedFitsFile::_totalNumRows, CompressedFitsFile::_transposedBuffer, i, FITS::kOrderByCol, and FITS::kOrderByRow.

Referenced by close(), and writeBinaryRow().

{
    uint32_t thisRoundNumRows = (_totalNumRows%_numRowsPerTile) ? _totalNumRows%_numRowsPerTile : _numRowsPerTile;

    //copy the tile and transpose it
    uint32_t offset = 0;
    for (uint32_t i=0;i<_columns.size();i++)
    {
        switch (_columns[i].getColumnOrdering())//getCompression())
        {
            case FITS::kOrderByRow:
                for (uint32_t k=0;k<thisRoundNumRows;k++)
                {//regular, "semi-transposed" copy
                    memcpy(&(_transposedBuffer[index][offset]), &_buffer[k*_rowWidth + _columns[i].offset()], _columns[i].sizeOfElems()*_columns[i].numElems());
                    offset += _columns[i].sizeOfElems()*_columns[i].numElems();
                }
            break;

            case FITS::kOrderByCol :
                for (int j=0;j<_columns[i].numElems();j++)
                    for (uint32_t k=0;k<thisRoundNumRows;k++)
                    {//transposed copy
                        memcpy(&(_transposedBuffer[index][offset]), &_buffer[k*_rowWidth + _columns[i].offset() + _columns[i].sizeOfElems()*j], _columns[i].sizeOfElems());
                        offset += _columns[i].sizeOfElems();
                    }
            break;
            default:
                    cout << "Error: unknown column ordering: " << _columns[i].getColumnOrdering() << endl;

        };
    }
}

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