Like the default to slow full rect in h and v lines in init . (Should I pr one ?)

gfx_simpletest.py is empty and I can not find any documentation as to how to use this library!

This bundle needs to be added to the Adafruit CircuitPyhon Bundle. Instructions for doing so can be found here in this Learn Guide.

This library missed the conversion to pyproject.toml and will need to be manually converted.

The fill_triangle method seems to be drawing triangles incorrectly around the middle vertex (in the vertical direction). This appears to be related to the method drawing a horizontal line with the same y co-ordinate twice at the level of the middle vertex. The behaviour happens because the final value of the loop variable y in the loop used to fill the top part of the triangle is repeated for the first line used to fill the bottom part of the triangle. The code from the two loops is below for reference.

The images below illustrate the issue around the middle vertex.

I have developed and tested a fix for this employed in the repository framebuf2 and will post it here as a pull request separately in the next day or two. While I realise that this library is due to be deprecated soon, I figure it may still be worthwhile to fix it.

        for y in range(y0, last + 1):
            a = x0 + sa // dy01
            b = x0 + sb // dy02
            sa += dx01
            sb += dx02
            if a > b:
                a, b = b, a
            self.hline(a, y, b - a + 1, *args, **kwargs)
        sa = dx12 * (y - y1)
        sb = dx02 * (y - y0)
        while y <= y2:
            a = x1 + sa // dy12
            b = x0 + sb // dy02
            sa += dx12
            sb += dx02
            if a > b:
                a, b = b, a
            self.hline(a, y, b - a + 1, *args, **kwargs)
            y += 1

Lines from 199 in fill_triangle should be:
sa = 0
sb = 0
if y1 == y2:
last = y1
else:
last = y1-1
y = y0
while y <= last:
which is a better translation of the original Adafruit c -code
needs y+=1 at end of loop

Should use https://github.com/adafruit/workflows-circuitpython-libs