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NAME
coopgammad - Cooperative gamma server
SYNOPSIS
coopgammad [-m method] [-s site] [-fkpq]
DESCRIPTION
Programs that desire to change the gamma adjustment
on a display should use this program instead of
talking directly with the display server (unless
the display server is mds). By doing this, multiple
programs can add filters to the display without
overriding each others effects.
By using coopgammad to apply adjustments, you can
select whether the adjustment is persistent or
shall be removed when your program disconnects
from coopgammad. Even if the adjustment is persistent
it can be modified or removed later by another
process.
OPTIONS
-f
Don't fork the process to the background.
If used, you can still detect when the
process has been initialised be waiting
for its stdout to close.
-k
Do not close stderr when forking to the
background.
-m METHOD
Adjustment method name or number. Recognised
names include:
dummy Dummy method
randr X RAndR
vidmode X VidMode
drm Linux DRM
gdi Windows GDI
quartz Quartz Core Graphics
The adjustment methods are supported via
libgamma(7). Only methods that were enabled
when libgamma as compiled will be supported.
-p
Add the current gamma adjustments to the
filter list at priority 0. Even if this
is not used, the gamma adjustments will
not change for an output until a filter
has been added for that output.
-q
If used once, print the selected adjustment
method for the first line to stdout, and
if site's have names for that method, print
the name of the selected site on the second
line to stdout. The second line can be omitted
if -s has not been used and the default site
cannot be find.
If used at least twice, print the pathname
of the socket for the select method and site
combination to stdout. Under unusual
circumstances, the path may contain LF
characters, but it will always be terminated
by one extra LF to mark the end of the
printed line.
-s SITE
Select the site to which to connect.
For example ':0', for local display 0 when
using X.
SIGNALS
SIGUSR1
Reexecute the process to an updated version.
SIGUSR2
SIGINFO if available
Dump the process state to standard error.
SIGRTMIN+0
Disconnect from the display server or
graphics card.
SIGRTMIN+1
Reconnect to the display server or graphics
card.
RATIONALE
After reading the description section, the need for
this should be obvious.
I plan to reuse code written for this program when
implementing mds-coopgamma(1), therefore, the
protocol is overly complicated, implementation-wise.
SEE ALSO
libcoopgamma(7), cg-tools(7), libgamma(7),
blueshift(1), mds-coopgamma(1).
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