private void WriteQuantizationTables(ref JpegWriter writer)
{
List <JpegQuantizationTable>?quantizationTables = _quantizationTables;
if (quantizationTables is null)
{
throw new InvalidOperationException();
}
writer.WriteMarker(JpegMarker.DefineQuantizationTable);
ushort totalByteCount = 0;
foreach (JpegQuantizationTable table in quantizationTables)
{
totalByteCount += table.BytesRequired;
}
writer.WriteLength(totalByteCount);
foreach (JpegQuantizationTable table in quantizationTables)
{
Span <byte> buffer = writer.GetSpan(table.BytesRequired);
table.TryWrite(buffer, out int bytesWritten);
writer.Advance(bytesWritten);
}
}
