public Bitmap PgmToBitmap(PgmImage pgmImage)
{
if (pgmImage != null && pgmImage.MagicNumber == "P2")
{
int width = pgmImage.Width;
int height = pgmImage.Height;
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.Data[i][j];
Color c = Color.FromArgb(pixelColor, pixelColor, pixelColor);
SolidBrush sb = new SolidBrush(c);
gr.FillRectangle(sb, j, i, 1, 1);
}
}
return(result);
}
return(null);
}
private void btn180_Click(object sender, EventArgs e)
{
Cursor.Current = Cursors.WaitCursor;
pgmOriginalImage = Rotate(pgmOriginalImage, EnumRotationAngles.D_180);
pbImage.Image = PgmToBitmap(pgmOriginalImage);
Cursor.Current = Cursors.Default;
}
private void chbNegative_Click(object sender, EventArgs e)
{
Cursor.Current = Cursors.WaitCursor;
chbNegative.Text = chbNegative.Checked ? "On" : "Off";
pgmOriginalImage = Negative(pgmOriginalImage);
pbImage.Image = PgmToBitmap(pgmOriginalImage);
Cursor.Current = Cursors.Default;
}
public PgmImage Negative(PgmImage pgmImage)
{
if (pgmImage != null)
{
PgmImage result = new PgmImage(pgmImage.Width, pgmImage.Height, pgmImage.MagicNumber, null, Byte.MinValue);
Array.Copy(pgmImage.Data, result.Data, pgmImage.Data.Length);
for (int i = 0; i < pgmImage.Height; i++)
{
for (int j = 0; j < pgmImage.Width; j++)
{
result.Data[i][j] = (byte)(255 - result.Data[i][j]);
if (result.MaxVal < result.Data[i][j])
{
result.MaxVal = result.Data[i][j];
}
}
}
return(result);
}
return(null);
}
private void openToolStripMenuItem_Click(object sender, EventArgs e)
{
DialogResult dlgResult = openFileDialog1.ShowDialog();
if (dlgResult == DialogResult.OK)
{
try
{
pgmOriginalImage = new PgmImage(openFileDialog1.FileName);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
pbImage.Image = PgmToBitmap(pgmOriginalImage);
if (pbImage.Image != null)
{
inputFileName = openFileDialog1.FileName;
tlpActions.Enabled = true;
}
else
{
tlpActions.Enabled = false;
inputFileName = null;
pbImage.Image = pbImage.ErrorImage;
}
chbNegative.Checked = false;
outputFileName = null;
fileToolStripMenuItem.PerformClick();
}
}
public PgmImage Rotate(PgmImage pgmImage, EnumRotationAngles angle)
{
if (pgmImage != null)
{
int width, height;
PgmImage result = null;
switch (angle)
{
case EnumRotationAngles.D_180:
width = pgmImage.Width;
height = pgmImage.Height;
result = new PgmImage(width, height, pgmImage.MagicNumber, pgmImage.Comment, pgmImage.MaxVal);
for (int i = pgmImage.Height - 1; i >= 0; i--)
{
for (int j = pgmImage.Width - 1; j >= 0; j--)
{
result.Data[pgmImage.Height - 1 - i][pgmImage.Width - 1 - j] = pgmImage.Data[i][j];
}
}
break;
case EnumRotationAngles.MINUS_90:
width = pgmImage.Height;
height = pgmImage.Width;
result = new PgmImage(width, height, pgmImage.MagicNumber, pgmImage.Comment, pgmImage.MaxVal);
for (int i = 0; i < pgmImage.Width; i++)
{
for (int j = pgmImage.Height - 1; j >= 0; j--)
{
result.Data[i][pgmImage.Height - 1 - j] = pgmImage.Data[j][i];
}
}
break;
case EnumRotationAngles.PLUS_90:
width = pgmImage.Height;
height = pgmImage.Width;
result = new PgmImage(width, height, pgmImage.MagicNumber, pgmImage.Comment, pgmImage.MaxVal);
for (int i = pgmImage.Width - 1; i >= 0; i--)
{
for (int j = 0; j < pgmImage.Height; j++)
{
result.Data[pgmImage.Width - 1 - i][j] = pgmImage.Data[j][i];
}
}
break;
default: return(null);
}
return(result);
}
return(null);
}
