This site is no longer active and is available for archival purposes only. Registration and login is disabled.

Flickering on new PocketHAL and new devices?


Flickering on new PocketHAL and new devices?

Postby jaguard » Jul 18, 2008 @ 4:52pm

There was an issue with flip operation when I didn't update the whole screen, but only the small rect.
I.e. when I called say display->Update(Rect(100,100,150,150)) to only update loading progress, display would flicker on some devices. This is absolutely true for PocketHAL 0.8.x (AFAIR) and ipaq h2110.

Now I would like to have this kind of optimization in a whole game, including gameplay - for battery saving purposes and also because framerate is not sufficient.
Will it work? Will it not flicker on all devices, especially new ones?

PS: Actually, I'm not using pure PocketHAL - it's PocketFrog, but I believe this flickering is PocketHAL's issue, not PocketFrog's.
jaguard
pm Member
 
Posts: 230
Joined: Mar 2, 2004 @ 6:45pm


Postby Kzinti » Jul 19, 2008 @ 12:00am

Jaguard, the rectangle you specify to Update() can be used to optimize the update, but it isn't used to clip the update. Said another way, PocketHAL might update only the specified rectangle, a bigger area or even the whole screen.

The behaviour is this way for performance reasons and also because some devices / APIs simply don't allow the updating of sub-sections of the screen.

Let me know if this explains your problem or not. If you have genuine flickering, then it might be a problem with the (newer) device. You are encouraged to use update rectangles to save on battery power and for better performances.
Kzinti
pm Member
 
Posts: 3238
Joined: Jan 13, 2002 @ 5:23am


Postby jaguard » Jul 19, 2008 @ 2:48pm

jaguard
pm Member
 
Posts: 230
Joined: Mar 2, 2004 @ 6:45pm


Postby Kzinti » Jul 19, 2008 @ 7:44pm

Kzinti
pm Member
 
Posts: 3238
Joined: Jan 13, 2002 @ 5:23am


Postby Kzinti » Jul 19, 2008 @ 8:23pm

Kzinti
pm Member
 
Posts: 3238
Joined: Jan 13, 2002 @ 5:23am


Postby jaguard » Jul 19, 2008 @ 9:35pm

jaguard
pm Member
 
Posts: 230
Joined: Mar 2, 2004 @ 6:45pm


Postby Kzinti » Jul 19, 2008 @ 10:44pm

Kzinti
pm Member
 
Posts: 3238
Joined: Jan 13, 2002 @ 5:23am


Postby jaguard » Jul 19, 2008 @ 11:18pm

jaguard
pm Member
 
Posts: 230
Joined: Mar 2, 2004 @ 6:45pm


Return to PocketFrog & PocketHAL


Sort


Forum Description

SDKs for fast and robust device-independent access to Pocket PC display hardware.

Moderators:

sponge, Kzinti

Forum permissions

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

cron