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Richard Grenville 3521f10a97 Improvement #74: Use libevent for main loop 
- Use libevent for main loop. I will explain the reasons in #56 later.
  The preferred libevent version is 2.x, yet 1.4.x should work as well.

- As a result, compton now should build fine on *BSD. Thanks to
  DachiChang for the FreeBSD build issue report.

- Another consequence is we now use microsecond-level timing all the
  way. Nanosecond-level code will be dropped soon. Start using long
  instead of unsigned long to represent time in milliseconds, as both
  can't hold the full epoch time in ms, anyway, and a signed type
  requires less care in subtraction. Wrap the epoch time in ms to 15
  days.

- Fix broken NO_VSYNC_DRM and NO_VSYNC_OPENGL compile-time options.

- Use git revision number for versioning in Makefile, and other small
  improvements.

- Reorganize struct _win. Drop unused w->damaged_sequence. w->damaged is
  turned to bool.

- Add type and format to winprop_t, as preparation for the new condition
  format.

- Add w->shadow_force and w->focus_force, to prepare for D-Bus support.

- Rename wid_get_prop() to wid_get_prop_adv() with more options. Add
  wrapper function wid_get_prop().

- Add some extra helper functions, for D-Bus support later.

- Make some functions return a bool value to indicate if it's
  successful.

- Modify add_win(), use a static const structure to initialize the new
  struct _win.

- Add some helper macros, like printf_err(f)(q). Make some errors fatal.

- Rename some types, constants, and functions. Code clean-up.

- Check for time disorder in paint_preprocess() when calculating fading
  steps.

- Rename evpoll() to swopti_handle_timeout(), and partially rewrite it.

- Make -h / --help legal.

- Known issue: compton segfaults on FreeBSD with nvidia-drivers, unless
  NO_VSYNC_OPENGL is used. Will look into it later. Thamls to DachiChang
  for reporting.
 		2013-01-08 10:19:19 +08:00
bin Merge branch 'master' into richardgv-dev 2012-11-14 18:46:26 +08:00
man Misc: Documentation update 2012-12-18 22:04:22 +08:00
src Improvement #74: Use libevent for main loop 2013-01-08 10:19:19 +08:00
.gitignore Feature #51: Re-initialize when SIGUSR1 is received 2012-11-19 11:44:58 +08:00
CPackConfig.cmake Bug fix: Window rendered incorrectly if has no border with -e 2012-11-06 11:37:29 +08:00
Doxyfile Feature #51: Re-initialize when SIGUSR1 is received 2012-11-19 11:44:58 +08:00
LICENSE update readme and man page. 2012-10-22 07:50:18 -05:00
Makefile Improvement #74: Use libevent for main loop 2013-01-08 10:19:19 +08:00
README.md Improvement #74: Use libevent for main loop 2013-01-08 10:19:19 +08:00
_CMakeLists.txt Merge branch 'master' into richardgv-dev 2012-11-14 18:46:26 +08:00
compton.sample.conf Improvement: Dynamic blur strength & improved frame blur performance 2012-12-15 20:07:45 +08:00
desc.txt Misc: #49: Add CMake support 2012-10-03 13:34:54 +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
  • configuration files (specified with --config)
  • colored shadows (with --shadow-[red/green/blue] value)
  • a new fade system
  • vsync (still under development)
  • several more options

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)
  • fixed the conflict with chromium and similar windows
  • many more

Building

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)
  • libXrandr (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)
  • libconfig (B,R) (Will probably be made optional soon)
  • libdrm (B) (Will probably be made optional soon)
  • libGL (B,R) (Will probably be made optional soon)
  • asciidoc (B) (if you wish to run make docs)
  • libevent (B,R)

How to build

To build, make sure you have the dependencies above:

# Make the main program
$ make
# Make the newer man pages
$ make docs
# Install
$ make install

(Compton does include a _CMakeLists.txt in the tree, but we haven't decided whether we should switch to CMake yet. The Makefile is fully usable right now.)

Known issues

  • VSync does not work too well. It's widely reported that tearing still happens on the top of the screen. I do not know how to fix the issue.

  • If --unredir-if-possible is enabled, when compton redirects/unredirects windows, the screen may flicker. Using --paint-on-overlay minimizes the problem from my observation, yet I do not know if there's a cure.

  • compton may not track focus correctly in all situations. The focus tracking code is experimental. --use-ewmh-active-win might be helpful.

  • Compton may give ugly shadow to windows with ARGB background if -z is enabled, because compton cannot determine their real shapes. One may have to disable shadows on those windows with window-type-specific settings in configuration file or --shadow-exclude.

  • There are two sets of man pages in the repository: the man pages in groff format (man/compton.1 & man/compton-trans.1) and the man pages in Asciidoc format (man/compton.1.asciidoc & man/compton-trans.1.asciidoc). The Asciidoc man pages are much more up-to-date than the groff ones, and it is viewable online. As chjj has not yet expressed his attitude towards switching to Asciidoc man pages, I kept both versions. By default the groff version is installed, unless you run make docs.

  • The performance of blurring is terrible, probably because of a problem in the X Render implementation. Its behavior is driver-dependent: With nvidia-drivers it works but there are strange 1px lines remaining when you operate on windows (not sure if it's a bug in compton or in the driver); with nouveau it's utterly broken.

Usage

Please refer to the Asciidoc man pages (man/compton.1.asciidoc & man/compton-trans.1.asciidoc) for more details and examples.

Note a sample configuration file compton.sample.conf is included in the repository.

Support

  • Bug reports and feature requests should go to the "Issues" section above.

  • Our (semi?) official IRC channel is #compton on FreeNode.

  • Some information is available on the wiki, including (and presently, only includes) a FAQ.

License

Although compton has kind of taken on a life of its own, it was originally an xcompmgr fork. 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
  • chjj and richardgv

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

Compton is distributed under MIT license, as far as I (richardgv) know. See LICENSE for more info.