public static Pixmap Bitmapize(Pixmap pixmap, int threshold)
{
pixmap.GetSize(out int width, out int height);
Gdk.Image image = pixmap.GetImage(0, 0, width, height);
Pixmap bitmap = new Pixmap(null, width, height, 1);
Gdk.GC bitSetter = new Gdk.GC(bitmap)
{
Function = Gdk.Function.Set
};
Gdk.GC bitClearer = new Gdk.GC(bitmap)
{
Function = Gdk.Function.Clear
};
for (int x = 0; x < width; x++)
{
for (int y = 0; y < height; y++)
{
if (BitConverter.GetBytes(image.GetPixel(x, y))[0] >= threshold)
{
bitmap.DrawPoint(bitSetter, x, y);
}
else
{
bitmap.DrawPoint(bitClearer, x, y);
}
}
}
return(bitmap);
}
