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Richard Grenville 0d6724385e Feature: Issue #29: Alternative shadow blacklist implementation 
- Add shadow blacklist feature, but a different implementation from
  nicklan's. 5 matching modes (exact, starts-with, contains, wildcard,
  PCRE) and 3 matching targets (window name, window class instance,
  window general class). Not extensively tested, bugs to be expected.
  It's slower for exact matching than nicklan's as it uses linear search
  instead of hash table. Also, PCRE's JIT optimization may cause issues
  on PaX kernels.

- Add dependency to libpcre. Could be made optional if we have a
  graceful way to handle that in Makefile.

- Some matching functions are GNU extensions of glibc. So this version
  may have troubles running on platforms not using glibc.

- Fix a bug that access freed memory blocks in set_fade_callcack() and
  check_fade_fin(). valgrind found it out.

- Use WM_CLASS to detect client windows instead of WM_STATE. Some client
  windows (like notification windows) have WM_CLASS but not WM_STATE.

- Mark the extents as damaged if shadow state changed in
  determine_shadow().

- Rewrite wid_get_name(). Code clean-up.

- Two debugging options: DEBUG_WINDATA and DEBUG_WINMATCH.

- As the matching system is ready, it should be rather easy to add other
  kinds of blacklists, like fading blacklist.
 		2012-09-22 11:42:39 +08:00
bin rename settrans to compton-trans, add manpage. 2012-06-23 17:39:49 -05:00
man rename settrans to compton-trans, add manpage. 2012-06-23 17:39:49 -05:00
src Feature: Issue #29: Alternative shadow blacklist implementation 2012-09-22 11:42:39 +08:00
.gitignore Misc: Add Vim swap files to .gitignore 2012-09-11 21:07:29 +08:00
LICENSE readme, etc 2011-11-06 22:03:18 -06:00
Makefile Feature: Issue #29: Alternative shadow blacklist implementation 2012-09-22 11:42:39 +08:00
README.md Feature: Issue #29: Alternative shadow blacklist implementation 2012-09-22 11:42:39 +08:00

README.md

Compton

Compton is a compositor for X, and a fork of xcompmgr-dana.

I was frustrated by the low amount of standalone lightweight compositors. Compton was forked from Dana Jansens' fork of xcompmgr and refactored. I fixed whatever bug I found, and added features I wanted. Things seem stable, but don't quote me on it. I will most likely be actively working on this until I get the features I want. This is also a learning experience for me. That is, I'm partially doing this out of a desire to learn Xlib.

Changes from xcompmgr:

  • inactive window transparency (specified with -i)
  • titlebar/frame transparency (specified with -e)
  • menu transparency (thanks to Dana)
  • shadows are now enabled for argb windows, e.g. terminals with transparency
  • removed serverside shadows (and simple compositing) to clean the code, the only option that remains is clientside shadows

The above features give compton a feature set similar to the xfce compositor.

Compton has only been tested with openbox so far, but frame transparency should work with any window manager that properly sets _NET_FRAME_EXTENTS.

Fixes from the original xcompmgr:

  • fixed a segfault when opening certain window types
  • fixed a memory leak caused by not freeing up shadows (from the freedesktop repo)

Building

The same dependencies as xcompmgr.

Dependencies:

B for build-time

R for runtime

  • libx11 (B,R)
  • libxcomposite (B,R)
  • libxdamage (B,R)
  • libxfixes (B,R)
  • libXext (B,R)
  • libxrender (B,R)
  • pkg-config (B)
  • make (B)
  • xproto / x11proto (B)
  • bash (R)
  • xprop,xwininfo / x11-utils (R)
  • libpcre (B,R) (Will probably be made optional soon)

To build, make sure you have the above dependencies:

$ make
$ make install

Usage

$ compton -cC -i 0.6 -e 0.6
$ compton -cC -i 0.6 -e 0.6 -fF
$ compton -cC -fF -I 0.065 -O 0.065 -D 6 -m 0.8 -i 0.6 -e 0.6

Options

compton [-d display] [-r radius] [-o opacity]
        [-l left-offset] [-t top-offset]
        [-i opacity] [-e opacity] [-cCfFSdG]
  • -d display Specifies the display to manage.
  • -r radius Specifies the blur radius for client-side shadows.
  • -o opacity Specifies the opacity for client-side shadows.
  • -l left-offset Specifies the left offset for client-side shadows.
  • -t top-offset Specifies the top offset for client-side shadows.
  • -I fade-in-step Specifies the opacity change between steps while fading in.
  • -O fade-out-step Specifies the opacity change between steps while fading out.
  • -D fade-delta Specifies the time (in milliseconds) between steps in a fade.
  • -c Enable client-side shadows on windows.
  • -f When -c is specified, enables a smooth fade effect for transient windows like menus, and for all windows on hide and restore events.
  • -C When -c is specified, attempts to avoid painting shadows on panels and docks.
  • -F When -f is specified, also enables the fade effect when windows change their opacity, as with transset(1).
  • -i opacity Specifies inactive window transparency. (0.1 - 1.0)
  • -e opacity Specifies window frame transparency. (0.1 - 1.0)
  • -G Avoid painting shadows on DND windows.
  • -b daemonize Attempt to daemonize process.
  • -S Enables synchronous operation. Useful for debugging.

License

xcompmgr has gotten around. As far as I can tell, the lineage for this particular tree is something like:

  • Keith Packard (original author)
  • Matthew Hawn
  • ...
  • Dana Jansens
  • Myself

Not counting the tens of people who forked it in between.

See LICENSE for more info.