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annotate Applications/StoneWebViewer/Resources/Fonts.txt @ 1660:05b55b89a134

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use local copy of open-sans, remove ua-parser
author Sebastien Jodogne <s.jodogne@gmail.com>
date Thu, 19 Nov 2020 10:21:20 +0100
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1
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2
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3 Tools for handling TTF and WOFF2
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4 ================================
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5
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6 https://fr.wikipedia.org/wiki/Web_Open_Font_Format_2
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7
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8
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9 Print info about a TTF
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10 ----------------------
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11
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12 $ sudo apt-get install fontconfig
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13 $ fc-query ./2017-11-13-OpenSans-Regular.ttf
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14
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15 => The "lang" and the "capability" are interesting to know the
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16 supported language. "en" and "otlayout:latn" are a must.
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17
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18
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19 Get version of a TTF
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20 --------------------
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21
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22 $ fc-query -f '%{fontversion}\n' ./OpenSans/2017-11-13-OpenSans-Regular.ttf | \
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23 grep -v 'id' | perl -E 'printf "%.3f\n", <>/65536.0'
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24
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25 => "1.100" indicates version "1.1"
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26
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27 Source: https://stackoverflow.com/a/43614521/881731
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28
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29
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30 Conversion from TTF to WOFF2
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31 ----------------------------
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32
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33 $ sudo apt install woff2
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34 $ woff2_compress 2017-11-13-OpenSans-Regular.ttf
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35
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36 Source: https://dev.to/benjaminblack/converting-ttf-fonts-to-woff2-and-woff-3f5b
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37
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38
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39
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40 OpenSans
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41 ========
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42
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43 General information
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44 -------------------
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45
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46 Official repository:
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47 https://github.com/googlefonts/opensans/tree/master/
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48
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49 License:
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50 Apache License 2.0
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51
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52 Google Fonts:
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53 https://fonts.google.com/specimen/Open+Sans#license
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54
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55 Google CDN:
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56 https://fonts.googleapis.com/css?family=Open+Sans
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57
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58 Debian package:
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59
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60 $ sudo apt-get install fonts-open-sans
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61 $ ls -l /usr/share/fonts/truetype/open-sans/
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62
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63
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64 Playing with the CDN
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65 --------------------
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66
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67 To fetch the WOFF2 from CDN (selecting WOFF2 instead of TTF is done by
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68 setting the HTTP Header User-Agent):
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69
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70 $ cd /tmp
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71 $ curl -H 'User-Agent: AppleWebKit/537 Chrome/85' 'https://fonts.googleapis.com/css?family=Open+Sans'
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72 => The "latin" section is what we're looking for
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73 $ wget https://fonts.gstatic.com/s/opensans/v18/mem8YaGs126MiZpBA-UFVZ0b.woff2
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74
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75
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76 To fetch the TTF from CDN:
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77
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78 $ curl 'https://fonts.googleapis.com/css?family=Open+Sans'
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79 $ wget https://fonts.gstatic.com/s/opensans/v18/mem8YaGs126MiZpBA-UFVZ0e.ttf
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80 $ woff2_compress mem8YaGs126MiZpBA-UFVZ0e.ttf
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81 $ diff -s ./mem8YaGs126MiZpBA-UFVZ0e.woff2 ./mem8YaGs126MiZpBA-UFVZ0b.woff2
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82
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83 => The files are identical
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84
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85
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86 As of 2020-11-19, the version of the TTF is "1.101":
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87
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88 $ fc-query -f '%{fontversion}\n' ./mem8YaGs126MiZpBA-UFVZ0e.ttf | \
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89 grep -v 'id' | perl -E 'printf "%.3f\n", <>/65536.0'
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90
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91
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92
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93 Generation of the "./OpenSans" folder
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94 -------------------------------------
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95
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96 $ mkdir ./OpenSans
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97 $ cd ./OpenSans
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98 $ REVISION=c0d8ce7dd46291a5d429ac537ddcd3617f4dc229
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99 $ wget https://github.com/googlefonts/opensans/raw/master/LICENSE.txt
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100 $ curl https://raw.githubusercontent.com/googlefonts/opensans/${REVISION}/ttfs/OpenSans-Regular.ttf > 2017-11-13-OpenSans-Regular.ttf
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101 $ woff2_compress 2017-11-13-OpenSans-Regular.ttf
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102
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103 => Note that the version of the TTF font is "2.010" (so more recent
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104 than the font on Google Fonts CDN)