MobileRead Forums - View Single Post - iLiad xepdmgr - another approach to auto-refresh

hansel · 09-19-2009, 02:39 AM

@Ericshliao: There will never be real partial updates: it is not implemented in the driver (see replies 81;82). Somehow, Irex never got to implement it

EDIT:

maybe we should infiltrate in the Irex development team (http://www.irextechnologies.com/about/jobs)

What xedpmgr tries to do is: use the quick (and dirty, some ghosting, less grey levels) update for small changes, a full refresh (long, white flash first) for big changes. I'm afraid this is the best we can do...

Happy coding nevertheless!

@Antartica: I found an even simpler (and better) way to decide about the update: just add up the areas of all damaged areas, and check this total in a timed loop. Do a 'full' update if the total area gets bigger than some limit, a 'typing' update otherwise (and of course nothing if nothing changed). See https://dev.mobileread.com/trac/luai...ts/XX/main.cpp for my experimental implementation).

This approach has the advantage that a lot of small changes at the same location give a full update once in a while (the display get ugly otherwise):

09-19-2009, 02:39 AM	#148
hansel JSR FFD2 Posts: 305 Karma: 1045 Join Date: Aug 2008 Location: Rotterdam, Netherlands, Europe, Sol 3 Device: iliad	@Ericshliao: There will never be real partial updates: it is not implemented in the driver (see replies 81;82). Somehow, Irex never got to implement it EDIT: maybe we should infiltrate in the Irex development team (http://www.irextechnologies.com/about/jobs) What xedpmgr tries to do is: use the quick (and dirty, some ghosting, less grey levels) update for small changes, a full refresh (long, white flash first) for big changes. I'm afraid this is the best we can do... Happy coding nevertheless! @Antartica: I found an even simpler (and better) way to decide about the update: just add up the areas of all damaged areas, and check this total in a timed loop. Do a 'full' update if the total area gets bigger than some limit, a 'typing' update otherwise (and of course nothing if nothing changed). See https://dev.mobileread.com/trac/luai...ts/XX/main.cpp for my experimental implementation). This approach has the advantage that a lot of small changes at the same location give a full update once in a while (the display get ugly otherwise): Last edited by hansel; 09-19-2009 at 05:54 AM.