Compton

• Compton A compositor for X11
• 개발 중단. picom 으로 전환
• Linux Window Manager 종류에 상관없이 윈도우에 투명, Shadow 등의 효과를 줄 수 있는 툴.
• xcompmgr 을 포크한 것임.

sudo add-apt-repository ppa:richardgv/compton
sudo apt-get update && sudo apt-get install compton

compton 사용시, 애플리케이션의 투명 기능은 꺼두는 것이 나은 듯.

• Using Compton for a tear-free experience in Xfce - Manjaro Linux

옵션 도움말은 compton --help.

아래는 예시.

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'

• compton-trans
• transset 래핑 스크립트

• --shadow-exclude 옵션을 통해 compton 적용 대상에서 제외 시키는 것이 가능하다. Add shadow blacklist option
• Wine, Firefox 애플리케이션 제외

  compton [...options..] --shadow-exclude 'g:e:Wine' --shadow-exclude 'n:w:*Firefox*'\
     --shadow-exclude 'i:e:mate-panel'

• Usage

  --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.

• Examples

  # 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$'

• lubuntu blog: Compton (shadow effects and more)
• Per Application Transparency 애플리케이션 단위로 투명도 지정/저장하기. xcompmgr 대신 compton이라고 보면 됨.
• How to Make Transparent and Shadow Effect - Linux
• How to switch to Compton for beautiful tear free compositing in XFCE: duncanlock.net