Flicker free graphics on 7650

[SAZSoft]

Can anyone help please? I can't get rid of gfx flicker on a 7650. The device is supposed to be double buffered so paint() should only be called on the off-screen buffer but it still flickers. If I call serviceRepaints() I'd have hoped it would then call paint() at the beginning of a vertical retrace but it makes no difference either. I could easily implement double buffering in software but if I can't sync to the vertical retrace then what chance is there of achieving flicker free graphics?

If I can't achieve sync with the vertical retrace then I'm wondering if there's a method where I can force J2ME to draw to the display from bottom to top (instead of the usual top to bottom) to minimise raster interaction.

Thanks for your help.

[norman_hartmann]

HI,

you might want to try something like this:
try {
// run at 20fps
int wait = (int)(System.currentTimeMillis() - timer);
wait = (1000/FRAMERATE)-wait;


if ( wait < 0)
Thread.yield();
else
Thread.sleep(wait);

// adjust timer
timer = System.currentTimeMillis();

} catch (Exception exc) {
}


Good Luck,
_Norman

[lnx]

I have seen only midlets that use FullCanvas to have no problems with flicker-free (fullscreen) graphics. Maybe in FullCanvas implementation they solved this vertical retrace synchronisation problem... The software double buffering will not solve the problem - I tried it...

lnx

[FatalError]

I have the same problem
I tried Norman's solution... it doesn't work
Does someone has a solution for this problem?