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ScreensaverLogic
Vitalii Koshura edited this page Apr 10, 2023
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2 revisions
The screensaver supports:
- Fullscreen graphics from project applications
- A default BOINC logo screensaver when no running applications support graphics
- Screen blanking after a given time
If the screensaver is running, the core client will try to devote screen time to a different project each time the CPUs are rescheduled.
request_ss_app():
choose some app that can do graphics
if app exists:
request app (from a different project if possible)
to do fullscreen graphics
ACK deadline = now + 5 sec
else:
do_boinc_logo_ss = true
// called to force poll function to request another app to do graphics
//
// this is called by schedule_cpus() whenever CPUs are rescheduled
//
reset():
tell any fullscreen app to hide
do_boinc_logo_ss = false
// called when core client receives a message from the screensaver module
//
start_ss(new_blank_time):
save all apps' modes
hide all apps
blank_time = new_blank_time
if activities not suspended:
request_ss_app()
// called when screensaver module quits
//
stop_ss():
clean up stuff
restore apps' modes
// called once a second
//
poll():
if activities not suspended:
if doing screensaver:
if blank_time != 0 && now > blank_time:
if not screen not already blanked:
tell any fullscreen app to hide
blank screen
do_boinc_logo_ss = false
else:
get the fullscreen app
if app exists:
if app has sent ACK:
do_boinc_logo_ss = false
else if ACK deadline has passed:
tell app to hide
do_boinc_logo_ss = true
else:
request_ss_app()
else:
do_boinc_logo_ss = true
/////////////////////////
logic of screensaver program:
screensaver starts
creates blank windows on every screen
show "screensaver loading" in all windows
if core client not running and not set to run on startup
show "boinc not running, auto startup not detected
please reinstall and select this option"
10 times, every 1 sec, then once every 30 sec
set_screensaver_mode RPC to core client
pass desktop/windowstation, blank time
get_screensaver_mode
returns:
- some app is doing fullscreen
- no graphics-capable app
- BOINC suspended
- time to blank
after each get_screensaver_mode (beyond initial 10 sec):
if no app is doing graphics,
do get_results RPC
show string on all windows