private void CDA()
{
x1 = int.Parse(first_x.Text) + 100; y1 = int.Parse(first_y.Text) + 100; x2 = int.Parse(second_x.Text) + 100; y2 = int.Parse(second_y.Text) + 100;
int dx = x2 - x1, dy = y2 - y1, steps, k, xf, yf;
float xIncrement, yIncrement, x = x1, y = y1;
if (Math.Abs(dx) > Math.Abs(dy))
{
steps = Math.Abs(dx);
}
else
{
steps = Math.Abs(dy);
}
xIncrement = dx / (float)steps;
yIncrement = dy / (float)steps;
PixelFunc func = new PixelFunc(SetPixel);
for (k = 0; k < steps; k++)
{
x += xIncrement;
xf = (int)x;
y += yIncrement;
yf = (int)y;
try
{
pictureBox1?.Invoke(func, xf, yf, Color.Blue);
}
catch (InvalidOperationException) { return; }
}
}
/// <summary>
/// Execute a function for every pixel in the image and apply changes to the pixel to the image directly.
/// </summary>
/// <typeparam name="T">the pixel format of the image</typeparam>
/// <param name="img">the image to use</param>
/// <param name="pixelFunction">the function to execute for every pixel</param>
/// <returns>the modified image (equal to img param)</returns>
public static Image <T> DirectChangeEachPixel <T>(this Image <T> img, PixelFunc <T> pixelFunction) where T : struct, IPixel <T>
{
for (int px = 0; px < img.Width - 1; px++)
{
for (int py = 0; py < img.Height - 1; py++)
{
img[px, py] = pixelFunction(px, py, img[px, py]);
}
}
return(img);
}
/// <summary>
/// Execute a function for every pixel in the image and apply changes to the pixel to a copy of the image.
/// </summary>
/// <remarks>uses Parallel.For to use multi- core- processors better</remarks>
/// <typeparam name="T">the pixel format of the image</typeparam>
/// <param name="img">the image to use</param>
/// <param name="pixelFunction">the function to execute for every pixel</param>
/// <param name="disposeOld">if true, the image img is disposed before the function returns the new image</param>
/// <returns>the modified image</returns>
public static Image <T> ChangeEachPixelParallel <T>(this Image <T> img, PixelFunc <T> pixelFunction, bool disposeOld) where T : struct, IPixel <T>
{
//create output image
Image <T> output = new Image <T>(img.Width, img.Height);
//enumerate all pixels
Parallel.For(0, img.Width - 1, (px) =>
{
for (int py = 0; py < img.Height - 1; py++)
{
output[px, py] = pixelFunction(px, py, img[px, py]);
}
});
//dispose old image
if (disposeOld)
{
img.Dispose();
}
return(output);
}
private void Render()
{
int xInitial = 10, yInitial = 20, xFinal = 150, yFinal = 200;
int dx = xFinal - xInitial, dy = yFinal - yInitial, steps, k, xf, yf;
float xIncrement, yIncrement, x = xInitial, y = yInitial;
if (Math.Abs(dx) > Math.Abs(dy))
{
steps = Math.Abs(dx);
}
else
{
steps = Math.Abs(dy);
}
xIncrement = dx / (float)steps;
yIncrement = dy / (float)steps;
PixelFunc func = new PixelFunc(SetPixel);
for (k = 0; k < steps; k++)
{
x += xIncrement;
xf = (int)x;
y += yIncrement;
yf = (int)y;
try
{
pictureBox1.Invoke(func, xf, yf, Color.Blue);
}
catch (InvalidOperationException)
{
return;
}
}
}
