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dtscreen(1)
CDE
NAME
dtscreen - the Common Desktop Environment animated screen savers
SYNOPSIS
dtscreen [-display dsp] [-delay usecs] [-batchcount num]
[-saturation value] [-nice nicelevel] [-mode mode]
DESCRIPTION
The dtscreen client supports the following key tasks:
· Draws an animated image on a provided window IDs
· Does not assume the size of the provided windows
· Provides a set of selectable animated images
· Animation parameters such as nice, speed, number and saturation may be
specified
The dtscreen client provides the default screen saver animations for the
desktop. When launched, it will query the desktop using the
.BDtSaverGetWindows() API for the set for window IDs on which to draw.
These window IDs could be the cover windows created by the session manager
for session lock, or a window embedded in the style manager's session lock
customization dialog. Once obtained, the dtscreen client will proceed to
draw in these windows using the specified options. If dtscreen cannot
obtain the set of window IDs, it will create its own. Usually, the dtscreen
client will be invoked directly by the session manager or by the style
manager.
The Session Manager, dtsession, is responsible for locking the session and
prompting for a password to unlock.
The session manager may launch the dtscreen client to provide screen saver
animations during session lock. Refer to the session manager specification
for resources controlling the launching of screen savers by the session
manager.
The style manager may launch the dtscreen client to provide a preview of a
screen saver animation during customization. Refer to the style manager
specification for information on how to integrate a screen saver client
such as dtscreen into the desktop.
The dtsession client provides a selectable set of animations. These are:
hop Hopalong iterated fractals
life Conway's game of life
qix Spinning lines
image Random bouncing image
swarm Swarm of bees
rotor Rotor
pyro Fireworks
flame Cosmic flame fractals
worm Wiggly worms
random Random selection of one of listed animations
OPTIONS
-display dsp
The display on which animations will be drawn.
-delay usecs
The delay option sets the speed at which a mode will operate. It
simply sets the number of microseconds to delay between batches
of hopalong pixels, qix lines, life generations, image blits, and
swarm motions.
-batchcount num
The batchcount option sets the number of things to do per batch
to num. In qix mode this refers to the number of lines rendered
in the same color. In hop mode this refers to the number of
pixels rendered in the same color. In image mode this refers to
the number of X logos on the screen at once. In swarm mode this
refers to the number of bees. In life mode it means nothing.
-saturation value
The saturation option sets the saturation of the color ramp used
to value. 0 is grayscale, 1 is very rich color and 0.4 is a nice
pastel.
-nice nicelevel
The nice option sets the system nicelevel of the dtscreen process
to nicelevel.
-mode mode
The mode option specifies which animation should be displayed.
Values are:
hop Hopalong iterated fractals
life Conway's game of life
qix Spinning lines
image Random bouncing image
swarm Swarm of bees
rotor Rotor
pyro Fireworks
flame Cosmic flame fractals
worm Wiggly worms
random Random selection of one of listed animations
RETURN VALUE
Exit values are:
0 Successful completion
>0 Error condition occurred
EXAMPLES
dtscreen -mode swarm
Display the swarm animation.
RESOURCES
Name ClassClass Type Default
________________________________________________
mode Mode String swarm
nice Nice Int 16
delay Delay Int 1000
batchcount Batchcount Int 100
saturation Saturation Float 1.0
hop.delay Delay Int 0
hop.batchcount Batchcount Int 1000
hop.saturation Saturation Float 1
image.delay Delay Int 2000000
image.batchcount Batchcount Int 8
image.saturation Saturation Float 0.2
qix.delay Delay Int 30000
qix.batchcount Batchcount Int 64
qix.saturation Saturation Float 1
life.delay Delay Int 1000000
life.batchcount Batchcount Int 1
life.saturation Saturation Float 1
swarm.delay Delay Int 10000
swarm.batchcount Batchcount Int 100
swarm.saturation Saturation Float 1
rotor.delay Delay Int 10000
rotor.batchcount Batchcount Int 4
rotor.saturation Saturation Float 0.4
pyro.delay Delay Int 15000
pyro.batchcount Batchcount Int 40
pyro.saturation Saturation Float 1.0
flame.delay Delay Int 10000
flame.batchcount Batchcount Int 20
flame.saturation Saturation Float 1.0
worm.delay Delay Int 10000
worm.batchcount Batchcount Int 20
worm.saturation Saturation Float 1.0
delay The delay option sets the speed at which a mode will operate. It
simply sets the number of microseconds to delay between batches
of hopalong pixels, qix lines, life generations, image blits, and
swarm motions.
batchcount
The batchcount option sets the number of things to do per batch
to num. In qix mode this refers to the number of lines rendered
in the same color. In hop mode this refers to the number of
pixels rendered in the same color. In image mode this refers to
the number of X logos on the screen at once. In swarm mode this
refers to the number of bees. In life mode it means nothing.
saturation
The saturation option sets the saturation of the color ramp used
to value. 0 is grayscale, 1 is very rich color and 0.4 is a nice
pastel.
nice The nice option sets the system nicelevel of the dtscreen process
to nicelevel.
mode The mode option specifies which animation should be displayed.
Values are:
hop Hopalong iterated fractals
life Conway's game of life
qix Spinning lines
image Random bouncing image
swarm Swarm of bees
rotor Rotor
pyro Fireworks
flame Cosmic flame fractals
worm Wiggly worms
random Random selection of one of listed animations
SEE ALSO
dtsession Launches the dtscreen client during session lock. Provides
resources that can be used to control this event. Locks and
unlocks a session.
dtstyle Launched the dtscreen client during session lock customization.
Provides the methods by which additional screen saver clients may
be integrated into the desktop.
|
Index for
Section 1 |
|
|
Alphabetical
listing for D |
|
 |
Top of
page |
|