/// <summary>
/// Debug function that finds the bodies in the image with the stencil router, and
/// assigns each of them a random color in the preview image.
/// </summary>
private void ColorImageBodies()
{
List <Body> bodies = StencilRouter.FindBodies(ImageToEtch);
using (Avalonia.Platform.ILockedFramebuffer buffer = ImageToEtch.Bitmap.Lock())
{
Random rng = new Random();
foreach (Body body in bodies)
{
byte randomBlue = (byte)rng.Next(1, 255);
byte randomGreen = (byte)rng.Next(1, 255);
byte randomRed = (byte)rng.Next(1, 255);
int pixelValue;
unchecked
{
pixelValue = (int)0xFF000000;
pixelValue |= (randomRed << 16) |
(randomGreen << 8) |
randomBlue;
}
foreach (Point point in body.Points)
{
IntPtr rowOffsetAddress = buffer.Address + (point.Y * buffer.Size.Width * 4);
IntPtr pixelAddress = rowOffsetAddress + (point.X * 4);
Marshal.WriteInt32(pixelAddress, pixelValue);
}
}
}
Image preview = this.FindControl <Image>("Preview");
preview.InvalidateVisual();
}
/// <summary>
/// Debug function that draws the etch paths onto the preview image
/// </summary>
private void DrawRoute()
{
List <Path> paths = Route.EtchPaths;
using (Avalonia.Platform.ILockedFramebuffer buffer = ImageToEtch.Bitmap.Lock())
{
foreach (Path outline in paths)
{
double numberOfPoints = outline.Points.Count;
double halfMark = numberOfPoints / 2.0;
for (int i = 0; i < numberOfPoints; i++)
{
Point point = outline.Points[i];
// Green stays at 255 until the halfway mark, then linearly decreases to 0
double greenScale = Math.Max(0, i - halfMark);
byte green = (byte)Math.Round((halfMark - greenScale) / halfMark * 255.0);
// Red starts at 0 and linearly increases to 255 at the halfway mark
byte red = (byte)Math.Round(Math.Min(1.0, i / halfMark) * 255.0);
int pixelValue;
unchecked
{
pixelValue = (int)0xFF000000;
pixelValue |= (red << 16) |
(green << 8);
}
IntPtr rowOffsetAddress = buffer.Address + (point.Y * buffer.Size.Width * 4);
IntPtr pixelAddress = rowOffsetAddress + (point.X * 4);
Marshal.WriteInt32(pixelAddress, pixelValue);
}
}
}
Image preview = this.FindControl <Image>("Preview");
preview.InvalidateVisual();
}
