static IEnumerable <CellMap <T> > GridCells <T>(this GridSpec <T> spec)
where T : struct
{
var bit = 0;
var seg = 0;
var segbits = spec.CellSize;
for (int row = 0, rowbit = 0; row < spec.RowCount; row++)
{
for (var col = 0; col < spec.ColCount; col++, bit++, rowbit++, segbits--)
{
if (segbits == 0)
{
seg++;
segbits = spec.CellSize;
}
var offset = (byte)(spec.CellSize - segbits).Bits;
var pos = CellIndex <T> .Define((ushort)seg, offset);
yield return(new CellMap <T>(pos.Segment, pos.Offset, pos.LinearIndex, row, col));
}
seg++;
segbits = spec.CellSize;
}
}
public GridLayout(GridSpec <T> spec, IEnumerable <CellMap <T> > Cells)
{
this.GridSpec = spec;
this.RowCount = spec.RowCount;
this.ColCount = spec.ColCount;
this.BitCount = spec.BitCount;
this.RowCellCount = spec.RowCellCount;
this.TotalCellCount = spec.TotalCellCount;
this.RowLayout = CreateLayoutIndex(Cells);
this.CellSize = spec.CellSize;
require(spec.RowCount == RowLayout.Count);
require(spec.ColCount == RowLayout.First().Value.Length);
}
public static GridLayout <T> CalcLayout <T>(this GridSpec <T> spec)
where T : struct
=> new GridLayout <T>(spec, spec.GridCells());
