Smooth scrolling with WinUAE?

Tony Landais · 27 May 2007, 08:40

Is there a way to have a nice refresh to get smooth scrolling in WinUAE?

s2325 · 27 May 2007, 08:44

Try turning on vertical vsync in Direct3D options.

Tony Landais · 27 May 2007, 09:03

Hum I am not sure the vertical sync works really well or is synchronise to the monitor.
You can see lines during fade in and fade out and I get the same result with directx or openGL, except that directx uses 25% more cpu time on my machine.
Is there any option like double or triple buffering like in mame ?

Toni Wilen · 27 May 2007, 10:32

Triple buffering is always enabled if available (except in overlay windowed mode)

and what does triple buffering have to do with smooth scrolling? For smooth scrolling you need to enable vsync.

sittingduck · 27 May 2007, 11:01

There's also this, which seems to work well: http://freespace.virgin.net/machine....ip/winuae.html

derSammler · 27 May 2007, 11:32

Quote:

Originally Posted by Tony Landais

You can see lines during fade in and fade out

If you're talking about tearing, that will disappear if you turn on v-sync.

alexh · 27 May 2007, 14:04

If you are talking about 100% smooth scrolling you need to enable v-sync and choose a refresh rate that is a whole multiple of the original.

i.e. 50Hz, 60Hz (or 100Hz and 120Hz)

If you have a good CRT monitor you should be able to do either 50Hz or 100Hz in 800x600

You may need Powerstrip to enable 50Hz

amiga · 27 May 2007, 20:17

Quote:

Originally Posted by alexh

If you are talking about 100% smooth scrolling you need to enable v-sync and choose a refresh rate that is a whole multiple of the original.

i.e. 50Hz, 60Hz (or 100Hz and 120Hz)

If you have a good CRT monitor you should be able to do either 50Hz or 100Hz in 800x600

You may need Powerstrip to enable 50Hz

... Or connect your PC to a TV :-)

Retro-Nerd · 27 May 2007, 20:39

Quote:

Originally Posted by amiga

... Or connect your PC to a TV :-)

Yep, the best solution. The WinUAE scrolling is very smooth on my PC monitor, no matter if vsync is enabled or not. But the 100Hz produces a viewable blurring, and 50 Hz on a PC monitor flickers as hell. The TV out quality is decent enough, even if you use composite video only. A S-Video out is of course much better.

Toni Wilen · 27 May 2007, 20:43

Quote:

Originally Posted by Retro-Nerd

The WinUAE scrolling is very smooth on my PC monitor, no matter if vsync is enabled or not.

No, it isn't. Try something with BIG horizontal scroller.

Retro-Nerd · 27 May 2007, 20:46

Quote:

Originally Posted by Toni Wilen

No, it isn't. Try something with BIG horizontal scroller.

Mmh, any game suggestions for this test?

Tony Landais · 29 May 2007, 08:35

hehe we have very different perception of what is smooth or not

Even with a perfect Vsync it still can t be smooth without a post treatment like motion blur or a fade out pixel like in mame. Pixels are too big at 320 by 256

The bilinear filter helps a bit but obviously not enought. Play eenzo slide demo and you ll see the scroll will accelerate and decelerating between each frame fonction of where the filter is smoothing.

Photon · 29 May 2007, 10:35

Quote:

Originally Posted by alexh

If you are talking about 100% smooth scrolling you need to enable v-sync and choose a refresh rate that is a whole multiple of the original.

i.e. 50Hz, 60Hz (or 100Hz and 120Hz)

If you have a good CRT monitor you should be able to do either 50Hz or 100Hz in 800x600

You may need Powerstrip to enable 50Hz

This is the only necessary answer in this thread. This will give you a perfect result.

NoX1911 · 30 May 2007, 03:55

50Hz gives sharper picture but is flickering like hell. 100Hz is flickerfree by the cost of less "temporal sharpness".

I think the CRT cannot "black-out" fast enough on 100Hz so you will see high motion areas twice at 100Hz (previous frame still partly visible). The same effect occurs if you move the mouse cursor on a full black screen. The cursor will smear.

100Hz is the best choice for general purpose though.

27 May 2007, 08:40	#1
Tony Landais Zone Friend Join Date: Mar 2003 Location: uk Posts: 426	Smooth scrolling with WinUAE? Is there a way to have a nice refresh to get smooth scrolling in WinUAE?

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27 May 2007, 08:44	#2
s2325 Zone Friend Join Date: Jun 2006 Location: Gargore Age: 44 Posts: 17,789	Try turning on vertical vsync in Direct3D options.

27 May 2007, 09:03	#3
Tony Landais Zone Friend Join Date: Mar 2003 Location: uk Posts: 426	Hum I am not sure the vertical sync works really well or is synchronise to the monitor. You can see lines during fade in and fade out and I get the same result with directx or openGL, except that directx uses 25% more cpu time on my machine. Is there any option like double or triple buffering like in mame ?

27 May 2007, 10:32	#4
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,570	Triple buffering is always enabled if available (except in overlay windowed mode) and what does triple buffering have to do with smooth scrolling? For smooth scrolling you need to enable vsync.

27 May 2007, 11:01	#5
sittingduck Registered User Join Date: Jun 2005 Location: Aarhus, Denmark Age: 46 Posts: 92	There's also this, which seems to work well: http://freespace.virgin.net/machine....ip/winuae.html

27 May 2007, 14:04	#7
alexh Thalion Webshrine Join Date: Jan 2004 Location: Oxford Posts: 14,461	If you are talking about 100% smooth scrolling you need to enable v-sync and choose a refresh rate that is a whole multiple of the original. i.e. 50Hz, 60Hz (or 100Hz and 120Hz) If you have a good CRT monitor you should be able to do either 50Hz or 100Hz in 800x600 You may need Powerstrip to enable 50Hz

29 May 2007, 08:35	#12
Tony Landais Zone Friend Join Date: Mar 2003 Location: uk Posts: 426	hehe we have very different perception of what is smooth or not Even with a perfect Vsync it still can t be smooth without a post treatment like motion blur or a fade out pixel like in mame. Pixels are too big at 320 by 256 The bilinear filter helps a bit but obviously not enought. Play eenzo slide demo and you ll see the scroll will accelerate and decelerating between each frame fonction of where the filter is smoothing.

30 May 2007, 03:55	#14
NoX1911 2064 Join Date: Jul 2005 Location: de Posts: 231	50Hz gives sharper picture but is flickering like hell. 100Hz is flickerfree by the cost of less "temporal sharpness". I think the CRT cannot "black-out" fast enough on 100Hz so you will see high motion areas twice at 100Hz (previous frame still partly visible). The same effect occurs if you move the mouse cursor on a full black screen. The cursor will smear. 100Hz is the best choice for general purpose though.

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