mirror of
https://github.com/ryanoasis/nerd-fonts.git
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106 lines
3.7 KiB
Python
Executable File
106 lines
3.7 KiB
Python
Executable File
#!/usr/bin/env python3
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# coding=utf8
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import sys
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import os.path
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import fontforge
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###### Some helpers
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def is_panose_monospaced(font):
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""" Check if the font's Panose flags say it is monospaced """
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# https://forum.high-logic.com/postedfiles/Panose.pdf
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panose = list(font.os2_panose)
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if panose[0] < 2 or panose[0] > 5:
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return -1 # invalid Panose info
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panose_mono = ((panose[0] == 2 and panose[3] == 9) or
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(panose[0] == 3 and panose[3] == 3))
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return 1 if panose_mono else 0
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def is_monospaced(font):
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""" Check if a font is probably monospaced """
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# Some fonts lie (or have not any Panose flag set), spot check monospaced:
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width = -1
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width_mono = True
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for glyph in [ 0x49, 0x4D, 0x57, 0x61, 0x69, 0x2E ]: # wide and slim glyphs 'I', 'M', 'W', 'a', 'i', '.'
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if not glyph in font:
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# A 'strange' font, believe Panose
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return is_panose_monospaced(font) == 1
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# print(" -> {} {}".format(glyph, font[glyph].width))
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if width < 0:
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width = font[glyph].width
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continue
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if font[glyph].width != width:
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# Exception for fonts like Code New Roman Regular or Hermit Light/Bold:
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# Allow small 'i' and dot to be smaller than normal
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# I believe the source fonts are buggy
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if glyph in [ 0x69, 0x2E ]:
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if width > font[glyph].width:
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continue
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(xmin, _, xmax, _) = font[glyph].boundingBox()
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if width > xmax - xmin:
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continue
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width_mono = False
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break
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# We believe our own check more then Panose ;-D
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return width_mono
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def get_advance_width(font, extended, minimum):
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""" Get the maximum/minimum advance width in the extended range """
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width = 0
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if extended:
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end = 0x17f
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else:
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end = 0x07e
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for glyph in range(0x21, end):
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if not glyph in font:
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continue
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if glyph in range(0x7F, 0xBF):
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continue # ignore special characters like '1/4' etc
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if width == 0:
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width = font[glyph].width
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continue
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if not minimum and width < font[glyph].width:
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width = font[glyph].width
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elif minimum and width > font[glyph].width:
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width = font[glyph].width
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return width
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###### Let's go!
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if len(sys.argv) < 2:
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print('Usage: {} font_name [font_name ...]\n'.format(sys.argv[0]))
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sys.exit(1)
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print('Examining {} font files'.format(len(sys.argv) - 1))
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for filename in sys.argv[1:]:
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fullfile = os.path.basename(filename)
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fname = os.path.splitext(fullfile)[0]
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font = fontforge.open(filename, 1)
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panose = list(font.os2_panose)
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mono = is_panose_monospaced(font)
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if mono == -1:
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monotxt = 'unknown'
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elif mono == 0:
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monotxt = 'false'
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elif mono == 1:
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monotxt = 'true'
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else:
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monotxt = '???'
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width = -1
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widthmono = True
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widthmono = is_monospaced(font)
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if (mono == 0 and widthmono) or (mono == 1 and not widthmono):
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print('LIES {} (width {} / {} - {}) Panose says "monospace {}" {}'.format(fname, get_advance_width(font, False, True), get_advance_width(font, False, False), get_advance_width(font, True, False), monotxt, panose))
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else:
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print('MONO {} (width {} / {} - {}) Panose says "monospace {}" {}'.format(fname, get_advance_width(font, False, True), get_advance_width(font, False, False), get_advance_width(font, True, False), monotxt, panose))
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if not widthmono:
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print('NOT MONO {} (width {} / {} - {}) Panose says "monospace {}" {}'.format(fname, get_advance_width(font, False, True), get_advance_width(font, False, False), get_advance_width(font, True, False), monotxt, panose))
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font.close()
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