private IEnumerable <IEnumerable <TPixelFormat> > ReadPAMData <TPixelFormat>(Stream stream, NetpbmHeader <TPixelFormat> header, IImageFactory <TPixelFormat> imageFactory)
{
// read the data!
for (int r = 0; r < header.Height; ++r)
{
yield return(imageFactory.ReadRow(stream, header.Width, header.Components.Count, header.HighestComponentValue));
}
}
private IEnumerable <IEnumerable <TPixelFormat> > ReadPGMOrPPMData <TPixelFormat>(Stream stream,
NetpbmHeader <TPixelFormat> header, IImageFactory <TPixelFormat> imageFactory)
{
// read the bits!
if (header.ImageType == ImageType.PGM || header.ImageType == ImageType.PPM)
{
for (int r = 0; r < header.Height; ++r)
{
yield return(imageFactory.ReadRow(stream, header.Width, header.Components.Count, header.HighestComponentValue));
}
}
else if (header.ImageType == ImageType.PlainPGM || header.ImageType == ImageType.PlainPPM)
{
for (int r = 0; r < header.Height; ++r)
{
yield return(ReadPlainRow(stream, header.Width * header.Components.Count, r == header.Height - 1, imageFactory));
}
}
else
{
throw new ArgumentOutOfRangeException("header.ImageType", header.ImageType, "image type unsupported by this method");
}
}