How to disable antialias?

[Nazar1ky]

Hello! I want to create image, fill it, add borders (so I can choose pixel width), I think I have to use Rectangle to do that, but while testing, I noticed that it does round rectangle for some reason, making antialias=false not helps, so any solution? (was trying #107)

using var image = new Image<Rgba32>(Configuration.Default, 200, 200, Color.Black);

var pen = Pens.Solid(Color.Red, 2);

var rect = new Rectangle(
    100,
    100,
    50,
    50
);
image.Mutate(ctx =>
{
    ctx.SetGraphicsOptions(new GraphicsOptions {Antialias = false});
    ctx.Draw(
        pen,
        rect
    );
});

image.Save("image.png");

Excepted result is rectangle with no rounding
I think it's related to #110, but the fix is not straightforward?