Height Difference Between Label and BitmapLabel

[FoamyGuy]

when background_tight=False BitmapLabel and Label arrive at different sizes for their heights.

This is easy to see visually with this script:

import board
import displayio
from adafruit_display_text_pr import bitmap_label, label
from terminalio import FONT
from font_league_script_number_one_webfont_72_latin1 import FONT as LEAGUE_SCRIPT

main_group = displayio.Group()
text = "ABCDFGg"
text_area = bitmap_label.Label(LEAGUE_SCRIPT, text=text, base_alignment=True, background_tight=False,
                               anchor_point=(0.0, 1.0), background_color=0xff00ff,
                               anchored_position=(0, board.DISPLAY.height * 3 // 4))
# text_area.x = 10
# text_area.y = 84
main_group.append(text_area)

text_area_lbl = label.Label(LEAGUE_SCRIPT, text=text, base_alignment=True, background_tight=False,
                            anchor_point=(0.0, 1.0), background_color=0x00ff00,
                            anchored_position=(0, board.DISPLAY.height * 3 // 4))
# text_area_lbl.x = 10
# text_area_lbl.y = 80
main_group.append(text_area_lbl)

board.DISPLAY.root_group = main_group
while True:
    pass

The different labels are intended to be placed at the same location via anchor positioning but end up offset from each other. The BitmapLabel has a much larger area filled for the background and the plain Label has a much smaller area that allows the ascenders and descenders to leak outside of it's supposed bounding box.

This was noted originally in #201