Fill for polygons

[dclaar]

Please add a fill option for polygons. See also: https://forums.adafruit.com/viewtopic.php?t=205093

Unlike other classes in this library, polygon.py does not have a fill option.

It has this option that I don't really understand:

   :param int colors: (Optional) Number of colors to use. Most polygons would use two, one for
                    outline and one for fill. If you're not filling your polygon, set this to 1
                    for smaller memory footprint. (2)

But there's no way to select that second color. Setting this value to either 1 or 2 does not appear to make any difference at all!

It would be great if it supported all of the "standard" params (meaning what the others support):

    :param int|None fill: The color to fill the rectangle. Can be a hex value for a color or
                    ``None`` for transparent.
    :param int|None outline: The outline of the rectangle. Can be a hex value for a color or
                    ``None`` for no outline.
    :param int stroke: Used for the outline. Will not change the outer bound size set by ``width``
                    and ``height``.

I suppose it's a bit tricky for an arbitrary shape though.

[bablokb]

You could use vectorio.Polygon, which is always filled. To create a polygon with outline-color and fill-color unequal, you need to draw the outline above the filled-version. See adafruit_display_shapes/arc.py for some boilerplate code.