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CasperJSのキャプチャ時に日本語の文字化けを防ぐ方法

CasperJSで

this.capture('/tmp/captuer.png');

とかでWEBサイトのキャプチャを取ると、日本語が表示されなくて文字化けのPNGが 出来上がってしまい、正しい出力結果が得られないので対応しました。

環境

結論

いくつか試しているWebの記事を見ましたが、上手く対応できた方やそうで無い方が 散見されたましたが、結果下記の対応で出来ました。

インストール

yum install -y freetype-devel fontconfig-devel ipa-gothic-fonts ipa-mincho-fonts

下記のようなファイルを作成。

vi /etc/fonts/local.conf

中身は以下。

<?xml version="1.0"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<fontconfig>
  <match target="font">
    <test name="family" compare="eq">
      <string>IPAPMincho</string>
    </test>
    <edit name="hinting" mode="assign">
      <bool>false</bool>
    </edit>
    <edit name="embeddedbitmap" mode="assign">
      <bool>false</bool>
    </edit>
  </match>
  <match target="font">
    <test name="family" compare="eq">
      <string>IPAPGothic</string>
    </test>
    <edit name="hinting" mode="assign">
      <bool>false</bool>
    </edit>
    <edit name="embeddedbitmap" mode="assign">
      <bool>false</bool>
    </edit>
  </match>
  <alias>
    <family>IPAPMincho</family>
    <default><family>serif</family></default>
  </alias>
  <alias>
    <family>serif</family>
    <prefer>
      <family>IPAPMincho</family>
    </prefer>
  </alias>
  <alias>
    <family>IPAPGothic</family>
    <default><family>sans-serif</family></default>
  </alias>
  <alias>
    <family>sans-serif</family>
    <prefer>
      <family>IPAPGothic</family>
    </prefer>
  </alias>
  <alias>
    <family>IPAGothic</family>
    <default><family>monospace</family></default>
  </alias>
  <alias>
    <family>monospace</family>
    <prefer>
      <family>IPAGothic</family>
    </prefer>
  </alias>
</fontconfig>

fonts.confは書き換えるなとの注記があるのですが、いらないディレクトリ読まれているので <dir>/usr/share/fonts</dir> の部分だけ活かすように修正。

mv /etc/fonts/fonts.conf /etc/fonts/fonts.conf.org

して /etc/fonts/fonts.conf を下記に置き換え。

<?xml version="1.0"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<!-- /etc/fonts/fonts.conf file to configure system font access -->
<fontconfig>

<!--
    DO NOT EDIT THIS FILE.
    IT WILL BE REPLACED WHEN FONTCONFIG IS UPDATED.
    LOCAL CHANGES BELONG IN 'local.conf'.

    The intent of this standard configuration file is to be adequate for
    most environments.  If you have a reasonably normal environment and
    have found problems with this configuration, they are probably
    things that others will also want fixed.  Please submit any
    problems to the fontconfig bugzilla system located at fontconfig.org

    Note that the normal 'make install' procedure for fontconfig is to
    replace any existing fonts.conf file with the new version.  Place
    any local customizations in local.conf which this file references.

    Keith Packard
-->

<!-- Font directory list -->
    <dir>/usr/share/fonts</dir>

<!--
    <dir>/usr/share/X11/fonts/Type1</dir> <dir>/usr/share/X11/fonts/TTF</dir> <dir>/usr/local/share/fonts</dir>
    <dir>~/.fonts</dir>
-->

<!--
  Accept deprecated 'mono' alias, replacing it with 'monospace'
-->
    <match target="pattern">
        <test qual="any" name="family">
            <string>mono</string>
        </test>
        <edit name="family" mode="assign">
            <string>monospace</string>
        </edit>
    </match>

<!--
  Accept alternate 'sans serif' spelling, replacing it with 'sans-serif'
-->
    <match target="pattern">
        <test qual="any" name="family">
            <string>sans serif</string>
        </test>
        <edit name="family" mode="assign">
            <string>sans-serif</string>
        </edit>
    </match>

<!--
  Accept deprecated 'sans' alias, replacing it with 'sans-serif'
-->
    <match target="pattern">
        <test qual="any" name="family">
            <string>sans</string>
        </test>
        <edit name="family" mode="assign">
            <string>sans-serif</string>
        </edit>
    </match>

<!--
  Load local system customization file
-->
    <include ignore_missing="yes">conf.d</include>

<!-- Font cache directory list -->

    <cachedir>/var/cache/fontconfig</cachedir>
    <cachedir>~/.fontconfig</cachedir>

    <config>
<!--
  These are the default Unicode chars that are expected to be blank
  in fonts.  All other blank chars are assumed to be broken and
  won't appear in the resulting charsets
 -->
        <blank>
            <int>0x0020</int>   <!-- SPACE -->
            <int>0x00A0</int>   <!-- NO-BREAK SPACE -->
            <int>0x00AD</int>   <!-- SOFT HYPHEN -->
            <int>0x034F</int>   <!-- COMBINING GRAPHEME JOINER -->
            <int>0x0600</int>   <!-- ARABIC NUMBER SIGN -->
            <int>0x0601</int>   <!-- ARABIC SIGN SANAH -->
            <int>0x0602</int>   <!-- ARABIC FOOTNOTE MARKER -->
            <int>0x0603</int>   <!-- ARABIC SIGN SAFHA -->
            <int>0x06DD</int>   <!-- ARABIC END OF AYAH -->
            <int>0x070F</int>   <!-- SYRIAC ABBREVIATION MARK -->
            <int>0x115F</int>   <!-- HANGUL CHOSEONG FILLER -->
            <int>0x1160</int>   <!-- HANGUL JUNGSEONG FILLER -->
            <int>0x1680</int>   <!-- OGHAM SPACE MARK -->
            <int>0x17B4</int>   <!-- KHMER VOWEL INHERENT AQ -->
            <int>0x17B5</int>   <!-- KHMER VOWEL INHERENT AA -->
            <int>0x180E</int>   <!-- MONGOLIAN VOWEL SEPARATOR -->
            <int>0x2000</int>   <!-- EN QUAD -->
            <int>0x2001</int>   <!-- EM QUAD -->
            <int>0x2002</int>   <!-- EN SPACE -->
            <int>0x2003</int>   <!-- EM SPACE -->
            <int>0x2004</int>   <!-- THREE-PER-EM SPACE -->
            <int>0x2005</int>   <!-- FOUR-PER-EM SPACE -->
            <int>0x2006</int>   <!-- SIX-PER-EM SPACE -->
            <int>0x2007</int>   <!-- FIGURE SPACE -->
            <int>0x2008</int>   <!-- PUNCTUATION SPACE -->
            <int>0x2009</int>   <!-- THIN SPACE -->
            <int>0x200A</int>   <!-- HAIR SPACE -->
            <int>0x200B</int>   <!-- ZERO WIDTH SPACE -->
            <int>0x200C</int>   <!-- ZERO WIDTH NON-JOINER -->
            <int>0x200D</int>   <!-- ZERO WIDTH JOINER -->
            <int>0x200E</int>   <!-- LEFT-TO-RIGHT MARK -->
            <int>0x200F</int>   <!-- RIGHT-TO-LEFT MARK -->
            <int>0x2028</int>   <!-- LINE SEPARATOR -->
            <int>0x2029</int>   <!-- PARAGRAPH SEPARATOR -->
            <int>0x202A</int>   <!-- LEFT-TO-RIGHT EMBEDDING -->
            <int>0x202B</int>   <!-- RIGHT-TO-LEFT EMBEDDING -->
            <int>0x202C</int>   <!-- POP DIRECTIONAL FORMATTING -->
            <int>0x202D</int>   <!-- LEFT-TO-RIGHT OVERRIDE -->
            <int>0x202E</int>   <!-- RIGHT-TO-LEFT OVERRIDE -->
            <int>0x202F</int>   <!-- NARROW NO-BREAK SPACE -->
            <int>0x205F</int>   <!-- MEDIUM MATHEMATICAL SPACE -->
            <int>0x2060</int>   <!-- WORD JOINER -->
            <int>0x2061</int>   <!-- FUNCTION APPLICATION -->
            <int>0x2062</int>   <!-- INVISIBLE TIMES -->
            <int>0x2063</int>   <!-- INVISIBLE SEPARATOR -->
            <int>0x206A</int>   <!-- INHIBIT SYMMETRIC SWAPPING -->
            <int>0x206B</int>   <!-- ACTIVATE SYMMETRIC SWAPPING -->
            <int>0x206C</int>   <!-- INHIBIT ARABIC FORM SHAPING -->
            <int>0x206D</int>   <!-- ACTIVATE ARABIC FORM SHAPING -->
            <int>0x206E</int>   <!-- NATIONAL DIGIT SHAPES -->
            <int>0x206F</int>   <!-- NOMINAL DIGIT SHAPES -->
            <int>0x2800</int>   <!-- BRAILLE PATTERN BLANK -->
            <int>0x3000</int>   <!-- IDEOGRAPHIC SPACE -->
            <int>0x3164</int>   <!-- HANGUL FILLER -->
            <int>0xFEFF</int>   <!-- ZERO WIDTH NO-BREAK SPACE -->
            <int>0xFFA0</int>   <!-- HALFWIDTH HANGUL FILLER -->
            <int>0xFFF9</int>   <!-- INTERLINEAR ANNOTATION ANCHOR -->
            <int>0xFFFA</int>   <!-- INTERLINEAR ANNOTATION SEPARATOR -->
            <int>0xFFFB</int>   <!-- INTERLINEAR ANNOTATION TERMINATOR -->
        </blank>
<!--
  Rescan configuration every 30 seconds when FcFontSetList is called
 -->
        <rescan>
            <int>30</int>
        </rescan>
    </config>

</fontconfig>