19 KiB
Picom (Compton) Configuration
- Introduction
- Shadows
- Rounded corners
- Fading
- Transparency and opacity
- Background blurring
- General settings
Introduction
Picom is the successor to Compton, a standalone compositor for Xorg. It provides
compositing for WM that do not provide any, such as i3. I am currently using
ibhagwan’s fork of compton which provides the dual-kawase
blur from tryone’s
compton and rounded corners from sdhand’s compton.
Shadows
The following enables client-side shadows on windows. Note desktop windows
(windows with _NET_WM_WINDOW_TYPE_DESKTOP
) never get shadow, unless explicitly
requested using the wintypes option.
shadow = true;
The blur radius radius for shadows is measured in pixels, and it defaults to 12px.
shadow-radius = 17;
Picom can also apply some level of opacity on shadows.
Default value | 0.75 |
Min value | 0.0 |
Max value | 1.0 |
shadow-opacity = 1
The left and top offsets for shadows are expressed in pixels.
Default value | -15 |
shadow-offset-x = -13;
shadow-offset-y = -13;
It is possible to set the color of the shadow with the string contained in
shadow-color
with a hexadecimal value. I haven’t included these values in my
config, but this value will override any value in shadow-red
, shadow-green
,
or shadow-blue
.
shadow-color = "#171A20"
It is possible to specify a list of conditions of windows that should have no shadow.
Default value | [] |
shadow-exclude = [
"name = 'Notification'",
"class_g = 'Conky'",
"class_g ?= 'Notify-osd'",
"class_g = 'Cairo-clock'",
"_GTK_FRAME_EXTENTS@:c"
];
It is also possible to specify an X geometry that describes the region in which shadows should not be painted in, such as a dock window region. For example,
# shadow-exclude-reg = "x10+0+0"
would make the 10 pixels at the bottom of the screen not have any shadow painted on.
Default value | "" |
shadow-exclude-reg = ""
Finally, it is also possible to crop the shadow of a window fully on a particular Xinerama screen to the screen.
- Default value
false
xinerama-shadow-crop = false
Deprecated options
Options in this subheader will not be exported to my configuration file.
Thanks to this value, Picom can avoid drawing shadows on dock or panel windows.
This option is deprecated, and users should use the wintypes
option in their
config file instead.
Default value | false |
no-dock-shadow = false;
This option allows Picom not to draw on drag-and-drop windows. This option is
deprecated, and users should use the wintypes
option in their config file
instead.
Default value | false |
no-dnd-shadow = false;
shadow-ignore-shaped
is also deprecated. It used to indicate Picom not to
paint shadows on shaped windows. Note shaped windows here means windows setting
their shape through X Shape extension. Those using ARGB background are beyond
Picom’s control. Since it is deprecated, you could instead use
shadow-exclude = 'bounding_shaped'
or
shadow-exclude = 'bounding_shaped && !rounded_corners'
Default value | "" |
shadow-ignore-shaped = ""
Rounded corners
Here we can see the declaration of the corners’ radius:
corner-radius = 10;
It is also possible to exclude some windows from getting their corners rounded. I personally excluded any window generated by AwesomeWM.
rounded-corners-exclude = [
"_NET_WM_WINDOW_TYPE@[0]:a = '_NET_WM_WINDOW_TYPE_DOCK'"
];
Fading
Picom has the ability to create some fading effects on windows when opening or
closing or when the opacity changes. The following parameter toggles this
feature on or off. However, its behavior can be changed with
no-fading-openclose
.
Default value | false |
fading = true
These values controls the opacity change between steps while fading in and out.
Default value | 0.028 (fade-in), 0.03 (fade-out) |
Min value | 0.01 |
Max value | 1.0 |
fade-in-step = 0.09;
fade-out-step = 0.08;
This value represents the time between steps in fade steps, in milliseconds.
Default value | 10 |
Min value | 1 |
fade-delta = 20;
It is possible to exclude some windows that should not be faded with a specified list of conditions.
Default value | [] |
fade-exclude = [ "class_g = 'mpv'" ];
This option allows Picom not to create any fade on windows opening or closing.
Default value | false |
no-fading-openclose = true;
Finally, this option is a workaround for Openbox, Fluxbox and others by not fading destroyed ARGB windows with WM frame.
Default value | false |
no-fading-destroyed-argb = false
Transparency and opacity
Picom is also able to create some opacity or transparency for windows, depending on their state or on some user-defined rules. For instance, the following value describes the opacity of inactive windows.
Default value | 1.0 |
Min value | 0.1 |
Max value | 1.0 |
inactive-opacity = 0.8;
On the other hand, it is possible to declare a default opacity for active windows.
Default value | 1.0 |
Min value | 0.1 |
Max value | 1.0 |
active-opacity = 1;
This however describes the opacity of window titlebars and borders.
Default value | 1.0 |
Min value | 0.1 |
Max value | 1.0 |
frame-opacity = 1.0;
menu-opacity
describes the opacity for dropdown menus and popup menus.
Default value | 1.0 |
Min value | 0.1 |
Max value | 1.0 |
# menu-opacity = 0.9;
inactive-opacity-override
allows the user to let inactive opacity set by -i
override the ~_NET_WM_OPACITY_ values of windows.
Default value | true |
inactive-opacity-override = true;
While it is possible to alter opacity on inactive windows, it is also possible to dim them.
Default value | 1.0 |
Min value | 0.1 |
Max value | 1.0 |
# inactive-dim = 1.0
It is also possible to use a fixed inactive dim value, instead of adjusting according to window opacity.
Default value | 1.0 |
Min value | 0.1 |
Max value | 1.0 |
# inactive-dim-fixed = 1.0
It is also possible to specify a list of conditions of windows that should always be considered focused.
Default value | [] |
focus-exclude = [
"class_g = 'mpv'",
"class_g = 'qemu'",
"class_g = 'Qemu-system-x86_64'"
];
The user can also specify a list of opacity rules, in the format
PERCENT:PATTERN
, like 50:name *= "Firefox"
. picom-trans
is recommended
over this. Note we don't make any guarantee about possible conflicts with other
programs that set _NET_WM_WINDOW_OPACITY
on frame or client windows.
Default value | [] |
opacity-rule = [];
Background blurring
The following are the parameters for background blurring, see the \*BLUR\* section for more information.
blur: {
method = "dual_kawase";
strength = 7;
background = false;
background-frame = false;
background-fixed = false;
}
This value enables or disables the blur for the background of semi-transparent or ARGB windows. It has bad performances though, with driver-dependent behavior. The name of the switch may change without prior notifications.
Default value | false |
blur-background = true;
Blur background of windows when the window frame is not opaque. If true, this
implies the value true
for blur-background
.
Default value | false |
blur-background-frame = true;
The following determines whether to use fixed blur strength rather than adjusting according to window opacity.
Default value | false |
blur-background-fixed = false;
Specify the blur convolution kernel, with the format
"5,5,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1"
.
Default value | "" |
# blur-kern = "3x3box";
It is possible to write exclude conditions for background blur.
Default value | [] |
blur-background-exclude = [
"window_type = 'desktop'",
"class_g = 'Polybar'",
"class_g = 'discord-overlay'",
"_GTK_FRAME_EXTENTS@:c"
];
General settings
Daemonize process. Fork to background after initialization. Causes issues with certain (badly-written) drivers.
Default value | false |
daemon = true;
Picom has three backends it can use: xrender
, glx
, and xr_glx_hybrid
. GLX
backend is typically much faster but depends on a sane driver.
Default value | xrender |
backend = "glx";
This enables or disables VSync.
Default value | false |
vsync = true;
Enable remote control via D-Bus. See the D-BUS API section below for more details.
Default value | false |
dbus = false;
Try to detect WM windows (a non-override-redirect window with no child that has
WM_STATE
) and markz them as active.
Default value | false |
mark-wmwin-focused = true;
Mark override-redirect windows that doesn't have a child window with WM_STATE
focused.
Default value | false |
mark-ovredir-focused = true;
Try to detect windows with rounded corners and don't consider them shaped windows. The accuracy is not very high, unfortunately.
Default value | false |
detect-rounded-corners = true;
Detect _NET_WM_OPACITY
on client windows, useful for window managers not
passing _NET_WM_OPACITY
of client windows to frame windows.
Default value | false |
detect-client-opacity = true;
Limit picom to repaint at most once every 1 / refresh_rate
second to boost
performance. This should not be used with
vsync drm/opengl/opengl-oml
as they essentially does sw-opti's job already, unless you wish to specify a lower refresh rate than the actual value.
Default value | "" |
# sw-opti =;
Use EWMH _NET_ACTIVE_WINDOW
to determine currently focused window, rather than
listening to FocusIn~/~FocusOut
event. Might have more accuracy, provided that
the WM supports it.
Default value | false |
# use-ewmh-active-win = false;
Unredirect all windows if a full-screen opaque window is detected, to maximize performance for full-screen windows. Known to cause flickering when redirecting/unredirecting windows. paint-on-overlay may make the flickering less obvious.
Default value | false |
unredir-if-possible = false;
Delay before unredirecting the window, in milliseconds.
Default value | 0 |
unredir-if-possible-delay = 0;
Conditions of windows that shouldn't be considered full-screen for unredirecting screen.
Default value | [] |
unredir-if-possible-exclude = [];
Use WM_TRANSIENT_FOR
to group windows, and consider windows in the same group
focused at the same time.
Default value | false |
detect-transient = true;
Use WM_CLIENT_LEADER
to group windows, and consider windows in the same group
focused at the same time. WM_TRANSIENT_FOR
has higher priority if
detect-transient is enabled, too.
Default value | false |
detect-client-leader = true;
Resize damaged region by a specific number of pixels. A positive value enlarges
it while a negative one shrinks it. If the value is positive, those additional
pixels will not be actually painted to screen, only used in blur calculation,
and such. (Due to technical limitations, with use-damage, those pixels will
still be incorrectly painted to screen.) Primarily used to fix the line
corruption issues of blur, in which case you should use the blur radius value
here (e.g. with a 3x3 kernel, you should use --resize-damage 1
, with a 5x5 one
you use --resize-damage 2
, and so on). May or may not work with
--glx-no-stencil
. Shrinking doesn't function correctly.
Default value | 1 |
resize-damage = 1;
Specify a list of conditions of windows that should be painted with inverted color. Resource-hogging, and is not well tested.
Default value | [] |
invert-color-include = [];
Disable the use of damage information. This cause the whole screen to be redrawn everytime, instead of the part of the screen has actually changed. Potentially degrades the performance, but might fix some artifacts. The opposing option is use-damage
Default value | false |
use-damage = false;
Use X Sync fence to sync clients' draw calls, to make sure all draw calls are finished before picom starts drawing. Needed on nvidia-drivers with GLX backend for some users.
Default value | false |
xrender-sync-fence = false;
Force all windows to be painted with blending. Useful if you have a glx-fshader-win that could turn opaque pixels transparent.
Default value | false |
force-win-blend = false;
Do not use EWMH to detect fullscreen windows. Reverts to checking if a window is fullscreen based only on its size and coordinates.
Default value | false |
no-ewmh-fullscreen = false;
Dimming bright windows so their brightness doesn't exceed this set value.
Brightness of a window is estimated by averaging all pixels in the window, so
this could comes with a performance hit. Setting this to 1.0 disables this
behaviour. Requires --use-damage
to be disabled.
Default value | 1.0 |
max-brightness = 1.0;
Make transparent windows clip other windows like non-transparent windows do, instead of blending on top of them.
Default value | false |
transparent-clipping = false;
Set the log level. Possible values are:
trace
debug
info
warn
error
in increasing level of importance. Case doesn't matter. If using the "TRACE" log
level, it's better to log into a file using --log-file
, since it can generate
a huge stream of logs.
Default value | "debug" |
log-level = "warn";
Set the log file. If --log-file
is never specified, logs will be written to
stderr. Otherwise, logs will to written to the given file, though some of the
early logs might still be written to the stderr. When setting this option from
the config file, it is recommended to use an absolute path.
Default value | '' |
# log-file = '/path/to/your/log/file';
Show all X errors (for debugging)
Default value | false |
# show-all-xerrors = false;
Write process ID to a file.
Default value | '' |
# write-pid-path = '/path/to/your/log/file';
Window type settings. WINDOW_TYPE
is one of the 15 window types defined in
EWMH standard:
"unknown"
"desktop"
"dock"
"toolbar"
"menu"
"utility"
"splash"
"dialog"
"normal"
"dropdown_menu"
"popup_menu"
"tooltip"
"notification"
"combo"
"dnd"
Following per window-type options are available:
- fade, shadow
- Controls window-type-specific shadow and fade settings.
- opacity
- Controls default opacity of the window type.
- focus
- Controls whether the window of this type is to be always considered focused. (By default, all window types except "normal" and "dialog" has this on.)
- full-shadow
- Controls whether shadow is drawn under the parts of the window that you normally won't be able to see. Useful when the window has parts of it transparent, and you want shadows in those areas.
- redir-ignore
- Controls whether this type of windows should cause screen to become redirected again after been unredirected. If you have unredir-if-possible set, and doesn't want certain window to cause unnecessary screen redirection, you can set this to `true`.
wintypes:
{
tooltip = { fade = true; shadow = true; opacity = 0.75; focus = true; full-shadow = false; };
dock = { shadow = false; }
dnd = { shadow = false; }
popup_menu = { opacity = 0.8; }
dropdown_menu = { opacity = 0.8; }
};
GLX backend-specific options
Avoid using stencil buffer, useful if you don't have a stencil buffer. Might cause incorrect opacity when rendering transparent content (but never practically happened) and may not work with blur-background. Tests show a 15% performance boost. Recommended.
Default value | false |
glx-no-stencil = true;
Avoid rebinding pixmap on window damage. Probably could improve performance on rapid window content changes, but is known to break things on some drivers (LLVMpipe, xf86-video-intel, etc.). Recommended if it works.
Default value | false |
glx-no-rebind-pixmap = false;
Use specified GLSL fragment shader for rendering window contents. See
compton-default-fshader-win.glsl
and
compton-fake-transparency-fshader-win.glsl
in the source tree for examples.
Default value | '' |
glx-fshader-win = '';