1 #!/usr/bin/env python

     2 # -*- coding: utf-8 -*-

     3 

     4 # This file is part of Beremiz

     5 # Copyright (C) 2021: Edouard TISSERANT

     6 #

     7 # See COPYING file for copyrights details.

     8 

     9 from __future__ import print_function

    10 from base64 import b64encode

    11 

    12 from fontTools import ttLib

    13 

    14 def GetFontTypeAndFamilyName(filename):

    15     """

    16     Getting font family, format and MIME type

    17     """

    18 

    19     familyname = None

    20     formatname = None

    21     mimetype = None

    22 

    23     font = ttLib.TTFont(filename)

    24     # https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6name.html

    25     for name in font["name"].names:

    26         if name.nameID==1 and name.platformID in [0,3]:

    27             familyname = name.toUnicode()

    28 

    29     if font.flavor :

    30         # woff and woff2

    31         formatname = font.flavor

    32         mimetype = "font/" + formatname

    33     # conditions on sfntVersion was deduced from fontTools.ttLib.sfnt

    34     elif font.sfntVersion in ("\x00\x01\x00\x00", "true"):

    35         formatname = "truetype" 

    36         mimetype = "font/ttf"

    37     elif font.sfntVersion == "OTTO":

    38         formatname = "opentype"

    39         mimetype = "font/otf"

    40 

    41     return familyname,formatname,mimetype

    42 

    43 def DataURIFromFile(filename, mimetype):

    44     with open(filename, "rb") as fp:

    45         data = fp.read()

    46     return "".join([

    47         "data:",

    48         mimetype,

    49         ";base64,",

    50         b64encode(data).strip()])

    51 

    52 def GetCSSFontFaceFromFontFile(filename):

    53     familyname, formatname, mimetype = GetFontTypeAndFamilyName(filename)

    54     data_uri = DataURIFromFile(filename, mimetype)

    55     css_font_face = \

    56     """

    57     @font-face {{

    58           font-family: "{}";

    59           src: url("{}") format("{}")

    60     }}

    61     """.format(familyname, data_uri, formatname)

    62     return css_font_face

    63 

    64 

    65 # tests

    66 if __name__ == '__main__':

    67     print(GetCSSFontFaceFromFontFile("/usr/share/matplotlib/mpl-data/fonts/ttf/DejaVuSans.ttf"))

    68     print(GetCSSFontFaceFromFontFile("/usr/share/fonts/opentype/urw-base35/NimbusSans-Regular.otf"))

    69     print(GetCSSFontFaceFromFontFile("/usr/share/yelp/mathjax/fonts/HTML-CSS/TeX/woff/MathJax_SansSerif-Regular.woff"))