118 lines
4.4 KiB
Markdown
118 lines
4.4 KiB
Markdown
# Compton
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__Compton__ is a compositor for X, and a fork of __xcompmgr-dana__.
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I was frustrated by the low amount of standalone lightweight compositors.
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Compton was forked from Dana Jansens' fork of xcompmgr and refactored. I fixed
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whatever bug I found, and added features I wanted. Things seem stable, but don't
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quote me on it. I will most likely be actively working on this until I get the
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features I want. This is also a learning experience for me. That is, I'm
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partially doing this out of a desire to learn Xlib.
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## Changes from xcompmgr:
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* __inactive window transparency / dimming__
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* __titlebar/frame transparency__ (specified with `-e`)
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* menu transparency (thanks to Dana)
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* shadows are now enabled for argb windows, e.g. terminals with transparency
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* removed serverside shadows (and simple compositing) to clean the code,
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the only option that remains is clientside shadows
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* configuration files (see the man page for more details)
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* colored shadows (`--shadow-[red/green/blue]`)
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* a new fade system
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* VSync support (not always working)
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* Blur of background of transparent windows, window color inversion (bad in performance)
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* Some more options...
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## Fixes from the original xcompmgr:
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* fixed a segfault when opening certain window types
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* fixed a memory leak caused by not freeing up shadows (from the freedesktop
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repo)
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* fixed the conflict with chromium and similar windows
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* [many more](https://github.com/chjj/compton/issues)
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## Building
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### Dependencies:
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__B__ for build-time
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__R__ for runtime
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* libx11 (B,R)
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* libxcomposite (B,R)
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* libxdamage (B,R)
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* libxfixes (B,R)
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* libXext (B,R)
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* libxrender (B,R)
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* libXrandr (B,R)
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* pkg-config (B)
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* make (B)
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* xproto / x11proto (B)
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* sh (R)
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* xprop,xwininfo / x11-utils (R)
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* libpcre (B,R) (Can be disabled with `NO_REGEX_PCRE` at compile time)
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* libconfig (B,R) (Can be disabled with `NO_LIBCONFIG` at compile time)
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* libdrm (B) (Can be disabled with `NO_VSYNC_DRM` at compile time)
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* libGL (B,R) (Can be disabled with `NO_VSYNC_OPENGL` at compile time)
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* libdbus (B,R) (Can be disabled with `NO_DBUS` at compile time)
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* asciidoc (B)
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### How to build
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To build, make sure you have the dependencies above:
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``` bash
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# Make the main program
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$ make
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# Make the man pages
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$ make docs
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# Install
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$ make install
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```
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(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.)
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## Known issues
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* 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.
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* 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.
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* compton may not track focus correctly in all situations. The focus tracking code is experimental. `--use-ewmh-active-win` might be helpful.
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* 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`.
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* 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.
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## Usage
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Please refer to the Asciidoc man pages (`man/compton.1.asciidoc` & `man/compton-trans.1.asciidoc`) for more details and examples.
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Note a sample configuration file `compton.sample.conf` is included in the repository.
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## Support
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* Bug reports and feature requests should go to the "Issues" section above.
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* Our (semi?) official IRC channel is #compton on FreeNode.
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* Some information is available on the wiki, including (and presently, only includes) a FAQ.
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## License
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Although compton has kind of taken on a life of its own, it was originally
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an xcompmgr fork. xcompmgr has gotten around. As far as I can tell, the lineage
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for this particular tree is something like:
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* Keith Packard (original author)
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* Matthew Hawn
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* ...
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* Dana Jansens
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* chjj and richardgv
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Not counting the tens of people who forked it in between.
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Compton is distributed under MIT license, as far as I (richardgv) know. See LICENSE for more info.
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