public override void WriteByte(byte value)
{
if (!initdone)
{
doInit();
}
if (deflateStream == null)
{
initStream();
}
base.WriteByte(value);
adler32.Update(value);
}
void UnfilterRow(int nbytes)
{
int ftn = rowbfilter[0];
FilterType filterType = (FilterType)ftn;
switch (filterType)
{
case Pngcs.FilterType.FILTER_NONE: UnfilterRowNone(nbytes); break;
case Pngcs.FilterType.FILTER_SUB: UnfilterRowSub(nbytes); break;
case Pngcs.FilterType.FILTER_UP: UnfilterRowUp(nbytes); break;
case Pngcs.FilterType.FILTER_AVERAGE: UnfilterRowAverage(nbytes); break;
case Pngcs.FilterType.FILTER_PAETH: UnfilterRowPaeth(nbytes); break;
default: throw new IO.IOException($"Filter type {ftn} not implemented");
}
if (crctest != null)
{
crctest.Update(rowb, 1, nbytes);
}
}