Really Fast Fullscreen

JFASI

8th March 2006 22:37 UTC

Really Fast Fullscreen
I'm wondering why my fullscreen is running so damn fast:

308x334 With pix-doubling in small screen:

44fps

848x480 With pix-doubling on full screen

55fps

on

/\/\y573rY pr3527

I'll only tell you that it has a convo filter two buffersaves and two simple DM's. Whay could be causing this speed? I'm quite interested.

MaTTFURY

9th March 2006 04:20 UTC

maybe because it has no render?

JaVS_v2.5

9th March 2006 08:03 UTC

So damn mystery..

oh...uh..

http://e.deviantart.com/emoticons/s/slap.gif

Grandchild

9th March 2006 18:11 UTC

Re: Really Fast Fullscreen

Originally posted by JFASI
848x480 With pix-doubling on full screen

:weird:
is that really an available fullscreen res? you must have some weird gfx card...
[and you really set your fullscreen res from the dropdown menu in the fullscreen settings, and don't set a windowed size and then simply click on fullscreen? :confused: just sth that came to my mind...]

GC

JFASI

9th March 2006 21:15 UTC

Aaargh!!! Black and whiiiiiite!!!

I'll exclude the lineup for evil reasons. Ok, so it did drop a tad, but still, it's really fast. It does have a clear screen, and the convofilter is kinda beefed, but still, why the big difference?

Yathosho

9th March 2006 22:28 UTC

probably has to do with bpp? 848x480 can be divided more "efficiently" by 32 or 16.. just a guess and i can't give you the tech mumbojumbo :)

JFASI

10th March 2006 01:49 UTC

You mean AVS draws the screen in sectors?

StevenRoy

10th March 2006 23:54 UTC

In full-screen mode, Windows can give AVS direct access to the screen and doesn't need to worry about any of that object and windowing stuff. That could account for some FPS increase, but probably not a 25% increase!

So let's look at those resolutions again...

Because of the effect of pixel doubling, the resolutions are actually a little misleading. 848x480 with pixel doubling is treated like 424x240, which is 101760 pixels. 308x334 is 102872 pixels. As a result, AVS actually has more work to do in the windowed resolution, because it's a slightly larger screen (in terms of number of pixels). When you combine that with a couple of convolution filters, that could explain most of your FPS difference.

Sort of interesting how that works, isn't it?

Grandchild

11th March 2006 00:05 UTC

but he pxl-doubled in windowed mode too!
still confusing...

StevenRoy

11th March 2006 00:10 UTC

Yes, and when you turn that on, the AVS editor shows you the halved resolution (in this case, 308x334), not the actual resolution (which would be 616x668).

Grandchild

11th March 2006 00:23 UTC

aaah, i get it!
now it's obvious.

well done sherlock!

JFASI

11th March 2006 13:30 UTC

Wow. That does explain a lot.