Robofont script to calculate the global bounding box for all open fonts

global bounding box.py

import os
a = AllFonts()


class GlyphPoints(object):
    def __init__(self, glyph):
        point_list = [
            point for contour in glyph.contours for point in contour.points]
        self.name = glyph.name
        self.xPoints = [point.x for point in point_list]
        self.yPoints = [point.y for point in point_list]


allBoxes = []

for f in a:

    allContours = [
        contour for glyph in f for contour in glyph.contours if glyph.contours]
    allPoints = [point for contour in allContours for point in contour.points]

    max_x = max([point.x for point in allPoints])
    min_x = min([point.x for point in allPoints])
    max_y = max([point.y for point in allPoints])
    min_y = min([point.y for point in allPoints])

    bbox = min_x, min_y, max_x, max_y
    if f.path:
        name = os.path.basename(f.path)
    else:
        name = '{} {}'.format(f.info.familyName, f.info.styleName)

    print('-' * len(name))
    print(name)
    print('bounding box: %s' % ' '.join([str(i) for i in bbox]))

    allBoxes.append(bbox)

    g_objects = [GlyphPoints(glyph) for glyph in f]
    print('x min', min_x, ' '.join(
        [go.name for go in g_objects if min_x in go.xPoints]))
    print('y min', min_y, ' '.join(
        [go.name for go in g_objects if min_y in go.yPoints]))
    print('x max', max_x, ' '.join(
        [go.name for go in g_objects if max_x in go.xPoints]))
    print('y max', max_y, ' '.join(
        [go.name for go in g_objects if max_y in go.yPoints]))

    print()


bottom_x = min([box[0] for box in allBoxes])
bottom_y = min([box[1] for box in allBoxes])
top_x = max([box[2] for box in allBoxes])
top_y = max([box[3] for box in allBoxes])

print('global bounding box:')
print(bottom_x, bottom_y, top_x, top_y)

print()
print(f'winAscent {top_y};')
print(f'winDescent {abs(bottom_y)};')