请问如何把cairo dock的背景设置成透明？

附件:

gnome.png [ 22.95 KiB | 被浏览 29 次 ]

附件:

kde.png [ 59.96 KiB | 被浏览 29 次 ]

代码:

<?xml version='1.0'?>
<!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
<fontconfig>
<!-- created by WenQuanYi FcDesigner v0.5 -->
<match>
  <test name="family">
   <string>sans-serif</string>
  </test>
  <edit binding="strong" mode="prepend" name="family">
   <string>WenQuanYi Micro Hei</string>
  </edit>
</match>
<match>
  <test name="family">
   <string>serif</string>
  </test>
  <edit binding="strong" mode="prepend" name="family">
   <string>WenQuanYi Micro Hei</string>
  </edit>
</match>
<match>
  <test name="family">
   <string>monospace</string>
  </test>
  <edit binding="strong" mode="prepend" name="family">
   <string>WenQuanYi Micro Hei Mono</string>
  </edit>
</match>
</fontconfig>