使用casperjs截出优雅的图片 - HelloWorld开发者社区

前言

优化字体的显示

使用Chrome OS字体来代替serif, sans-serif, sans, monospace字体

/usr/share/fonts/default/truetype/croscorefonts
├── Arimo-BoldItalic.ttf
├── Arimo-Bold.ttf
├── Arimo-Italic.ttf
├── Arimo-Regular.ttf
├── Cousine-BoldItalic.ttf
├── Cousine-Bold.ttf
├── Cousine-Italic.ttf
├── Cousine-Regular.ttf
├── fonts.dir
├── fonts.scale
├── SymbolNeu.ttf
├── Tinos-BoldItalic.ttf
├── Tinos-Bold.ttf
├── Tinos-Italic.ttf
└── Tinos-Regular.ttf

0 directories, 15 files

~/.fonts.conf

<?xml version='1.0'?>
<!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
<fontconfig>

  <!-- Set preferred serif, sans serif, and monospace fonts. -->
  <alias>
    <family>serif</family>
    <prefer><family>Tinos</family></prefer>
  </alias>
  <alias>
    <family>sans-serif</family>
    <prefer><family>Arimo</family></prefer>
  </alias>
  <alias>
    <family>sans</family>
    <prefer><family>Arimo</family></prefer>
  </alias>
  <alias>
    <family>monospace</family>
    <prefer>
        <family>Meslo LG L DZ</family>
        <family>Cousine</family>
    </prefer>
  </alias>

  <!-- Aliases for commonly used MS fonts. -->
  <match>
    <test name="family"><string>Arial</string></test>
    <edit name="family" mode="assign" binding="strong">
      <string>Arimo</string>
    </edit>
  </match>
  <match>
    <test name="family"><string>Helvetica</string></test>
    <edit name="family" mode="assign" binding="strong">
      <string>Arimo</string>
    </edit>
  </match>
  <match>
    <test name="family"><string>Verdana</string></test>
    <edit name="family" mode="assign" binding="strong">
      <string>Arimo</string>
    </edit>
  </match>
  <match>
    <test name="family"><string>Tahoma</string></test>
    <edit name="family" mode="assign" binding="strong">
      <string>Arimo</string>
    </edit>
  </match>
  <match>
    <!-- Insert joke here -->
    <test name="family"><string>Comic Sans MS</string></test>
    <edit name="family" mode="assign" binding="strong">
      <string>Arimo</string>
    </edit>
  </match>
  <match>
    <test name="family"><string>Times New Roman</string></test>
    <edit name="family" mode="assign" binding="strong">
      <string>Tinos</string>
    </edit>
  </match>
  <match>
    <test name="family"><string>Times</string></test>
    <edit name="family" mode="assign" binding="strong">
      <string>Tinos</string>
    </edit>
  </match>
  <match>
    <test name="family"><string>Courier New</string></test>
    <edit name="family" mode="assign" binding="strong">
      <string>Cousine</string>
    </edit>
  </match>

  <match target="font" >
    <edit mode="assign" name="autohint" >
      <bool>true</bool>
    </edit>
  </match>
  <match target="font" >
    <edit mode="assign" name="rgba" >
      <const>none</const>
    </edit>
  </match>
  <match target="font" >
    <edit mode="assign" name="hinting" >
      <bool>false</bool>
    </edit>
  </match>
  <match target="font" >
    <edit mode="assign" name="hintstyle" >
      <const>hintnone</const>
    </edit>
  </match>
  <match target="font" >
    <edit mode="assign" name="antialias" >
      <bool>true</bool>
    </edit>
  </match>
</fontconfig>

fc-cache -fv
# 查看一下字体是否选择正确
fc-match monospace

js脚本

example.js

var fs = require('fs');

var casper = require('casper').create({
    stepTimeout: 3000
});

var url = casper.cli.get(0);
url = url || 'http://tool.lu/';

casper.start().viewport(1280, 800).thenOpen(url, function () {
    // this.captureSelector('snap.png', '.post');
    var filename = 'snap.png';
    this.capture(filename);
    this.echo(JSON.stringify({url: this.getCurrentUrl(), path : fs.absolute(filename)}));
});

casper.run();