public byte[] ReadRowByte(byte[] buffer, int nrow)
{
if (buffer == null)
{
buffer = new byte[unpackedMode ? ImgInfo.SamplesPerRow : ImgInfo.SamplesPerRowPacked];
}
if (!interlaced)
{
if (nrow <= rowNum)
{
throw new PngjInputException("rows must be read in increasing order: " + nrow);
}
int bytesread = 0;
while (rowNum < nrow)
{
bytesread = ReadRowRaw(rowNum + 1); // read rows, perhaps skipping if necessary
}
decodeLastReadRowToByte(buffer, bytesread);
}
else // interlaced
{
if (deinterlacer.getImageByte() == null)
{
deinterlacer.setImageByte(ReadRowsByte().ScanlinesB); // read all image and store it in deinterlacer
}
Array.Copy(deinterlacer.getImageByte()[nrow], 0, buffer, 0, unpackedMode ? ImgInfo.SamplesPerRow
: ImgInfo.SamplesPerRowPacked);
}
return(buffer);
}
public byte[] ReadRowByte(byte[] buffer, int nrow)
{
if (buffer == null)
{
buffer = new byte[unpackedMode ? ImgInfo.SamplesPerRow : ImgInfo.SamplesPerRowPacked];
}
if (!interlaced)
{
if (nrow <= rowNum)
{
throw new PngjInputException("rows must be read in increasing order: " + nrow.ToString());
}
int bytesRead = 0;
while (rowNum < nrow)
{
bytesRead = ReadRowRaw(rowNum + 1);
}
decodeLastReadRowToByte(buffer, bytesRead);
}
else
{
if (deinterlacer.getImageByte() == null)
{
deinterlacer.setImageByte(ReadRowsByte().ScanlinesB);
}
Array.Copy(deinterlacer.getImageByte()[nrow], 0, buffer, 0, unpackedMode ? ImgInfo.SamplesPerRow : ImgInfo.SamplesPerRowPacked);
}
return(buffer);
}