Fix GL screensavers in non-direct mode.

DirectDraw is called only in direct drawing mode (BDirectWindow). Our GL
kit also works fine (but slower) in indirect mode (standard BWindow, GL
stuff rendered offscreen then blitted). However, for this to work we
need the screensavers to actually do something. Use the
BScreenSaver::Draw method, which is called in either case.

This makes it possible to use indirect mode for the preview of GL
screensavers. The performance isn't really a problem on the very small
preview (160x200 pixels).

Fixes GLife and Gravity. Flurry still crashes Mesa.

Flurry Screen Saver: style fixes, correct Jamfile

* Indentation update in DateTime.h
* Extended BTime, BDate and BDateTime with archiving functionality.
* Adjusted code which uses these classes, since including DateTime.h
already imports the classes from the BPrivate namespace.
* Moved DateTime.h into Support Kit. It is still in the BPrivate namespace,
as I am uncertain what to do with time_type and diff_type. I'd favor
moving the constants into the classes itself. Possibly removing the B_
prefix from them. Feedback welcome.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@35772 a95241bf-73f2-0310-859d-f6bbb57e9c96

* port of known OSX screensaver done by Calum Robinson called Flurry (the default one on OSX)
* add to build but not to the image since

- misses some configuration stuff
- does not look as good as it could be because of missing double buffering
- does crash screen_blanker on hide (as all GL screensaver did that i tested)



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29718 a95241bf-73f2-0310-859d-f6bbb57e9c96

Fix GL screensavers in non-direct mode.

DirectDraw is called only in direct drawing mode (BDirectWindow). Our GL
kit also works fine (but slower) in indirect mode (standard BWindow, GL
stuff rendered offscreen then blitted). However, for this to work we
need the screensavers to actually do something. Use the
BScreenSaver::Draw method, which is called in either case.

This makes it possible to use indirect mode for the preview of GL
screensavers. The performance isn't really a problem on the very small
preview (160x200 pixels).

Fixes GLife and Gravity. Flurry still crashes Mesa.

Flurry Screen Saver: style fixes, correct Jamfile

* Indentation update in DateTime.h
* Extended BTime, BDate and BDateTime with archiving functionality.
* Adjusted code which uses these classes, since including DateTime.h
already imports the classes from the BPrivate namespace.
* Moved DateTime.h into Support Kit. It is still in the BPrivate namespace,
as I am uncertain what to do with time_type and diff_type. I'd favor
moving the constants into the classes itself. Possibly removing the B_
prefix from them. Feedback welcome.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@35772 a95241bf-73f2-0310-859d-f6bbb57e9c96

* port of known OSX screensaver done by Calum Robinson called Flurry (the default one on OSX)
* add to build but not to the image since

- misses some configuration stuff
- does not look as good as it could be because of missing double buffering
- does crash screen_blanker on hide (as all GL screensaver did that i tested)



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29718 a95241bf-73f2-0310-859d-f6bbb57e9c96