private void button2_Click(object sender, EventArgs e)
{
MemoryBitmap mbp = new MemoryBitmap(new Bitmap(pictureBox1.Image));
MemoryBitmap output = new MemoryBitmap(new Bitmap(pictureBox1.Image));
int[] xModel = new int[] { 1, 1, 1, 0, 0, 0, -1, -1, -1 };
int[] yModel = new int[] { -1, 0, 1, -1, 0, 1, -1, 0, 1 };
mbp.Gray();
for (int i = 0; i < mbp.Height; i++)
{
for (int j = 0; j < mbp.Width; j++)
{
int index = 0;
int Gx = 0, Gy = 0;
for (int m = -1; m < 2; m++)
{
for (int n = -1; n < 2; n++)
{
int vx = j + n >= mbp.Width ? j * 2 - mbp.Width : j + n;
int vy = i + m >= mbp.Height ? i * 2 - mbp.Height : i + m;
if (vx < 0)
{
vx *= -1;
}
if (vy < 0)
{
vy *= -1;
}
int val = mbp.GetPixel(vx, vy).R;
Gx += val * xModel[index];
Gy += val * yModel[index];
index++;
}
}
Gx = Math.Abs(Gx);
Gy = Math.Abs(Gy);
int p = Math.Max(Gx, Gy);
output.SetPixel(j, i, p, p, p);
}
}
output.SaveMemory();
pictureBox2.Image = output.bmp;
}
/// <summary>
/// Draws the control in normal or pushed states
/// </summary>
/// <param name="e">Paitn event</param>
protected override void OnPaint(PaintEventArgs e)
{
var attributes = new ImageAttributes();
using (var g = Graphics.FromImage(MemoryBitmap))
{
if (Pushed)
{
using (var pen = new Pen(Theme.ThemeBase))
GraphicsExtensions.DrawThemedGradientRectangle(g, pen, ClientRectangle, Dpi.ScaleSize(new Size(8, 8)));
}
else
{
g.Clear(Parent.BackColor);
}
var textSize = g.MeasureString(Text, Font);
var textArea = new RectangleF((ClientSize.Width - textSize.Width) / 2,
(ClientSize.Height - textSize.Height),
textSize.Width,
textSize.Height);
if (Image != null)
{
var imageWidth = Dpi.Scale(Image.Width);
var imageHeight = Dpi.Scale(Image.Height);
var imageArea = new Rectangle((ClientSize.Width - imageWidth) / 2,
(ClientSize.Height - imageHeight) / 2,
imageWidth,
imageHeight);
var key = Image.GetPixel(0, 0);
attributes.SetColorKey(key, key);
g.DrawImage(Image,
StretchImage ? ClientRectangle : imageArea,
0, 0, Image.Width, Image.Height,
GraphicsUnit.Pixel,
attributes);
}
using (var brush = new SolidBrush(ForeColor))
g.DrawString(Text, Font, brush, textArea);
if (Pushed)
{
var key = MemoryBitmap.GetPixel(0, 0);
attributes.SetColorKey(key, key);
}
else
{
attributes.ClearColorKey();
}
e.Graphics.DrawImage(MemoryBitmap,
ClientRectangle,
0, 0, MemoryBitmap.Width, MemoryBitmap.Height,
GraphicsUnit.Pixel,
attributes);
}
}