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.TH CG-DARKROOM 1 CG-TOOLS
.SH NAME
cg-darkroom - Invert colour on the monitors and make them dark red
.SH SYNOPSIS
.B cg-darkroom
.RB [ \-M
.IR method ]
.RB [ \-S
.IR site ]
.RB [ \-c
.IR crtc "]... ["\fB\-R\fP
.IR rule ]
.RB ( \-x
|
.RB [ \-p
.IR priority ]
.RB [ \-d ]
.RI [ brightness ])
.SH DESCRIPTION
.B cg-darkroom
inverts the colours on the monitors, dim them, and turns of
the green and blue channels. The monitors are dimmed to the
brilliance of
.IR brightness ,
or 0.25 if not specified. A value of 0 means complete darkness,
and 1 means normal brilliance.
.SH OPTIONS
.TP
.BR \-c " "\fIcrtc\fP
Apply the filter to the CRTC with the monitor whose EDID is
.IR crtc .
By default, the filter is applied to all monitors.
If
.I crtc
is
.RB ' ? ',
all available CRTC's are listed.
.TP
.B \-d
Keep the process alive and remove the filter on death.
.TP
.BR \-M " "\fImethod\fP
Adjustment method name or number. Recognised names include:
.TS
tab(:);
l l.
\fBdummy\fP:Dummy method
\fBrandr\fP:X RAndR
\fBvidmode\fP:X VidMode
\fBdrm\fP:Linux DRM
\fBgdi\fP:Windows GDI
\fBquartz\fP:Quartz Core Graphics
.TE
The adjustment methods are supported via
.BR libgamma (7).
Only methods that were enabled when
.B libgamma
was compiled will be supported.
If
.I method
is
.RB ' ? ',
all available adjustment methods are printed.
.TP
.BR \-p " "\fIpriority\fP
Set the priority of the filter. Filters with higher priority
are applied before filters with lower priority. The value
must be a signed 64-bit integer (between \-9223372036854775807
and 9223372036854775807).
.BR cg-darkroom 's
default priority is 6917529027641081856.
If
.I priority
is
.RB ' ? ',
the utility's default priority is printed.
.TP
.BR \-R " "\fIrule\fP
Set the rule of of the filter to
.IR rule .
This is the last part of the filter's identifier (class).
The default rule is
.BR standard .
If
.I rule
is
.RB ' ? '
the utility's default rule is printed. If
.I rule
is
.RB ' ?? '
the utility's default class is printed.
.TP
.BR \-S " "\fIsite\fP
Select the site to which to connect. For example
.RB ' :0 ',
for local display 0 when using
.BR X .
.TP
.B \-x
Remove the currently applied filter.
.SH "SEE ALSO"
.BR cg-tools (7)
.SH BUGS
Please report bugs to https://github.com/maandree/cg-tools/issues
or to maandree@kth.se
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