Frans Pop wrote:
On Saturday 14 July 2007 11:15, Attilio Fiandrotti wrote:DirectFB allows to set [1] the way the desktop window buffering mechanism works by disabling the backend buffer. The result, in my experiments, was saving some some hundreds KB of memory with no noticeable drawbacks.I'm not sure about this.I've tested this change in VMWare and I get quite a lot of "flashes" when the display is updated in quick succession. The flashes are really noticeable and are not there without the patch, so it looks as if the window buffer does help to stabilize display updates in D-I.
I don't get that many flashes on my pc, but i guess the behaviour may be strictly hardware-dependant. The flashes are due to the lack of a backend buffer and exploit the possible drawbacks i was talking about, as described in directfbrc man page. Anyway, i don't feel compromising usability for some hundreds KB of memory saving, so if you don't think this patch should be applied, please just mark it as wontfix for future reference. I hope to get considerable memory savings when DirectFB 1.0 is available [1].
regards Attilio Fiandrotti [1] http://lists.debian.org/debian-boot/2007/07/msg00355.html