Is there a way to know if a font is Truetype or OpenType? #2619
Replies: 1 comment 8 replies
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from fontTools.ttLib import TTFont
f = TTFont("path/to/font")
if "glyf" in f:
print("font is TTF")
else:
print("font is OTF") |
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That font is an OpenType file format with TrueType character/glyph outlines. What exactly are you trying to determine? EDIT: You posted while I was writing. |
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Depending on your system, searching for font files may include a large number of TrueType collection files, which start with the tag "ttcf" and may contain either TrueType or CFF-based fonts. Your check doesn't include this case respectively counts them as "not TrueType". |
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Your code is buggy: you read four bytes, but then do (The stackoverflow code is dodgy: while it does read 5 bytes, I don't know whether the fifth byte will always be zero. It should read four bytes.) |
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Then there are Apple TrueType fonts where the first four bytes are |
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@justvanrossum @jenskutilek You are both totally right. I just make an wrong test from matplotlib import font_manager
from fontTools import ttLib
fontsPath = font_manager.findSystemFonts()
numberOfDifference = 0
for path in fontsPath:
with open(path, 'rb') as fontFile:
fontType = fontFile.read(5)
if not fontType.startswith(b'ttcf'):
ttLibFont = ttLib.TTFont(path, fontNumber=0)
isTrueTypeStackOverflow = False
if fontType.startswith(b'\x00\x01\x00\x00\x00'):
isTrueTypeStackOverflow = True
isTrueTypeFonttools = False
if "glyf" in ttLibFont:
isTrueTypeFonttools = True
if isTrueTypeFonttools != isTrueTypeStackOverflow:
numberOfDifference += 1
print(path)
print("Font: " + str(len(fontsPath)))
print("numberOfDifference: " + str(numberOfDifference))Output So, i 8000 n brief, everything is good. I did not know that an .otf file is not necessary an opentype font. My ignorance led me to think looking at the glyphs wasn't a good way to go, but I was wrong. At least, it confimed that it is a good technic to know if it is an truetype font or an opentype font |
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Is there a way to know if a font is Truetype or OpenType via fonttools?
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