static Bitmap MakeBitmap(PgmImage pgmImage, int mag)
{
int width = pgmImage.width * mag;
int height = pgmImage.height * mag;
Bitmap result = new Bitmap(width, height);
Graphics gr = Graphics.FromImage(result);
for (int i = 0; i < pgmImage.height; ++i)
{
for (int j = 0; j < pgmImage.width; ++j)
{
int pixelColor = pgmImage.pixels[i][j];
Color c = Color.FromArgb(pixelColor, pixelColor, pixelColor);
SolidBrush sb = new SolidBrush(c);
gr.FillRectangle(sb, j * mag, i * mag, mag, mag);
}
}
return(result);
}
public Boolean LoadImage(string file, out PgmImage image)
{
FileStream ifs = new FileStream(file, FileMode.Open);
BinaryReader br = new BinaryReader(ifs);
string magic = NextNonCommentLine(br);
if (magic != "P5")
{
//throw new Exception("Unknown magic number: " + magic);
SystemSounds.Beep.Play();
MessageBox.Show("Unknown magic number: " + magic + "\nFile must be pgm with P5 as magic number");
image = null;
return(false);
}
//listBox1.Items.Add("");
//listBox1.Items.Add("magicer = " + magic);
string widthHeight = NextNonCommentLine(br);
string[] tokens = widthHeight.Split(' ');
int width = int.Parse(tokens[0]);
int height;
if (tokens.Length == 2)
{
height = int.Parse(tokens[1]);
}
else
{
widthHeight = NextNonCommentLine(br);
height = int.Parse(widthHeight);
}
//listBox1.Items.Add("widthht = " + width + " " + height);
if (width * height > 2000000)
{
SystemSounds.Beep.Play();
MessageBox.Show("File to large: " + width * height + "\nFile must under 2,000,000 pixels");
image = null;
return(false);
}
string sMaxVal = NextNonCommentLine(br);
int maxVal = int.Parse(sMaxVal);
//listBox1.Items.Add("maxVal+ maxVal);
// read width * height pixel values . . .
byte[][] pixels = new byte[height][];
for (int i = 0; i < height; ++i)
{
pixels[i] = new byte[width];
}
for (int i = 0; i < height; ++i)
{
for (int j = 0; j < width; ++j)
{
try
{
pixels[i][j] = br.ReadByte();
}
catch (Exception e)
{
pixels[i][j] = (pixels[i - 1][j] <= pixels[i][j - 1] ? pixels[i - 1][j] : pixels[i][j - 1]);
Console.WriteLine("Error at i:={0}, j:={1}, e:={2}", i, j, e.ToString());
}
}
}
br.Close(); ifs.Close();
PgmImage result = new PgmImage(width, height, maxVal, pixels);
//listBox1.Items.Add("imageed");
image = result;
return(true);
}