Using Clip + Flip seems to use the data outside of the clip region, how do I avoid that? #375

texture.Mutate(context =>
{
    var options = context.Configuration.GetGraphicsOptions();
    options.Antialias = false;
    context.Configuration.SetGraphicsOptions(options);


    // Rectangle from other library I'm using
    var fontGlyphRect = font.GetGlyphSourceRectangle(1);

    // Transform into SixLabors rectangle
    RectangleF rect = new(fontGlyphRect.X, fontGlyphRect.Y, fontGlyphRect.Width, fontGlyphRect.Height);

    // Convert rect to IPath to clip, then flip that clipped area
    context.Clip(new RectangularPolygon(rect), context2 => context2.Flip(FlipMode.Vertical));
});