public void WriteImageData(IPNMDataWriter dw, System.Drawing.Image im)
{
int i = 0;
//convert im to grey scale and write to output file
for (int y = 0; y < im.Height; y++)
{
for (int x = 0; x < im.Width; x++)
{
Color c = ((Bitmap)im).GetPixel(x, y);
int luma = (int)(c.R + c.G + c.B);
if (luma > 0)
{
dw.WriteByte((byte)1);
}
else
{
dw.WriteByte((byte)0);
}
i++;
//one line cannot contain more than 70 chars
if (i >= 34)
{
i = 0;
dw.WriteLine(string.Empty);
}
}
}
dw.Close();
}
public void WriteImageData(IPNMDataWriter dw, System.Drawing.Image im)
{
int i = 0;
//convert im to grey scale and write to output file
for (int y = 0; y < im.Height; y++)
{
for (int x = 0; x < im.Width; x++)
{
Color c = ((Bitmap)im).GetPixel(x, y);
int luma = (int)(c.R * 0.3 + c.G * 0.59 + c.B * 0.11);
dw.WriteByte((byte)luma);
i++;
//one line cannot contain more than 70 chars
if ((dw is ASCIIDataWriter) && i >= 17)
{
i = 0;
dw.WriteByte((byte)'\n');
}
}
}
dw.Close();
}
public static void WritePNM(string FilePath, System.Drawing.Image im, PNMEncoding encoding, PNMType ptype)
{
FileStream fs = new FileStream(FilePath, FileMode.Create, FileAccess.Write, FileShare.None);
IPNMDataWriter dw = PNMFactory.GetIPNMDataWriter(fs, encoding);
if (dw == null)
{
throw new Exception
("Currently only Binary and ASCII encoding is supported");
}
try
{
//write image header
dw.WriteLine(PNMFactory.GetMagicWord(ptype, encoding));
dw.WriteLine(im.Width.ToString() + " " + im.Height.ToString());
if (ptype != PNMType.PBM)
{
dw.WriteLine("255");
}
IPNMWriter imWriter = PNMFactory.GetIPNMWriter(ptype);
imWriter.WriteImageData(dw, im);
}
catch { throw; }
}
public static IPNMDataWriter GetIPNMDataWriter
(FileStream fs, PNMEncoding encoding)
{
IPNMDataWriter dw = null;
switch (encoding)
{
case PNMEncoding.ASCIIEncoding:
dw = new ASCIIDataWriter(fs);
break;
case PNMEncoding.BinaryEncoding:
dw = new BinaryDataWriter(fs);
break;
}
return(dw);
}
