====== Compton ======
  * [[https://github.com/chjj/compton|Compton]] A compositor for X11
  * 개발 중단. [[linux:picom|picom]] 으로 전환
  * [[linux:windowmanager|Linux Window Manager]] 종류에 상관없이 윈도우에 투명, Shadow 등의 효과를 줄 수 있는 툴.
  * [[https://wiki.archlinux.org/index.php/xcompmgr|xcompmgr]] 을 포크한 것임.

===== 설치 =====
<code sh>
sudo add-apt-repository ppa:richardgv/compton
sudo apt-get update && sudo apt-get install compton
</code>

compton 사용시, 애플리케이션의 투명 기능은 꺼두는 것이 나은 듯.

  * [[https://wiki.manjaro.org/index.php?title=Using_Compton_for_a_tear-free_experience_in_Xfce|Using Compton for a tear-free experience in Xfce - Manjaro Linux]]
===== 시작 프로그램으로 등록 =====
옵션 도움말은 ''compton <nowiki>--</nowiki>help''.

아래는 예시.
<code sh>
compton -c -r 8 -l -24 -t -12 -G -b --shadow-exclude 'g:e:Wine' --shadow-exclude 'n:w:*Firefox*'\
   --shadow-exclude 'i:e:mate-panel' --shadow-exclude 'i:e:cairo-dock'
</code>
===== compton-trans =====
  * [[https://github.com/chjj/compton/blob/master/bin/compton-trans|compton-trans]]
  * ''transset'' 래핑 스크립트

===== shadow-exclude =====
  * ''%%--%%shadow-exclude'' 옵션을 통해 compton 적용 대상에서 제외 시키는 것이 가능하다. [[https://github.com/chjj/compton/pull/29|Add shadow blacklist option]]
  * Wine, Firefox 애플리케이션 제외<code sh>
compton [...options..] --shadow-exclude 'g:e:Wine' --shadow-exclude 'n:w:*Firefox*'\
   --shadow-exclude 'i:e:mate-panel'
</code>
  * Usage<code>
--shadow-exclude condition
  Exclude conditions for shadows.

Format of a condition:

  condition = <target>:<type>[<flags>]:<pattern>

  <target> is one of "n" (window name), "i" (window class
  instance), and "g" (window general class)

  <type> is one of "e" (exact match), "a" (match anywhere),
  "s" (match from start), "w" (wildcard), and "p" (PCRE
  regular expressions, if compiled with the support).

  <flags> could be a series of flags. Currently the only defined
  flag is "i" (ignore case).

  <pattern> is the actual pattern string.
</code>
  * Examples<code>
# Don't paint shadow if window name is exactly URxvt
compton -c --shadow-exclude 'n:e:URxvt'

# Don't paint shadow if window general class string starts with
# "Notification", ignore case
compton -c --shadow-exclude 'g:si:Notification'

# Don't paint shadow if window name matches wildcard "*Firefox*"
compton -c --shadow-exclude 'n:w:*Firefox*'

# Don't paint shadow if window instance class string contains "navigator",
# ignore case
compton -c --shadow-exclude 'i:wi:navigator'

# Don't paint shadow if window name matches PCRE regular expression
# "( - )?Mozilla Firefox$", ignore case
compton -c --shadow-exclude 'n:pi:( - )?Mozilla Firefox$'

# Combine them all
compton -c --shadow-exclude 'n:e:URxvt' \
  --shadow-exclude 'g:si:Notification' \
  --shadow-exclude 'n:w:*Firefox*' \
  --shadow-exclude 'i:wi:navigator' \
  --shadow-exclude 'n:pi:( - )?Mozilla Firefox$'
</code>

===== 참조 =====
  * [[http://lubuntublog.blogspot.com.es/p/compton.html|lubuntu blog: Compton (shadow effects and more)]]
  * [[https://wiki.archlinux.org/index.php/Per_Application_Transparency|Per Application Transparency]] 애플리케이션 단위로 투명도 지정/저장하기. xcompmgr 대신 compton이라고 보면 됨.
  * [[http://nujulinux.blogspot.kr/2013/01/how-to-make-transparent-and-shadow.html|How to Make Transparent and Shadow Effect - Linux]]
  * [[http://duncanlock.net/blog/2013/06/07/how-to-switch-to-compton-for-beautiful-tear-free-compositing-in-xfce/|How to switch to Compton for beautiful tear free compositing in XFCE: duncanlock.net]]