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Chris
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Joined: 19 Apr 2002
Posts: 125
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 Posted: Fri Jul 21, 2006 1:36 am Post subject: V-sync doesn't work properly (skippy and stuttering) on G400 |
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Is there any chance old flipping/triplebuffering back ? please ? 
i think old version (99.) 's flipping worked much more smoothly (and faster too) on old VGA , which was enabled by default ,when V-sync was disabled through PCE.INI
thanks always |
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dmichel
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Joined: 04 Apr 2002
Posts: 1166
Location: France
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| Posted: Fri Jul 21, 2006 11:48 am Post subject: |
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I can't do much unfortunately, in both versions the vsync stuff is done by DirectX, DX 2 in the old version and DX 8 in the new version, and when the emulator is run in OpenGL mode, OpenGL handles that too, in all cases I have no control over how the vsync is done. 
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David Michel |
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Jabberwok
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Joined: 24 Apr 2002
Posts: 532
Location: Quebec, Canada
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| Posted: Sun Jul 23, 2006 4:31 am Post subject: |
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Maybe the G400 is at fault here? Chris, can you test with a newer video card? Because maybe the G400 isn't blitting fast enough... If at all.
Maybe Magic engine uses page flipping... David?
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If you translate Pole Position in French with babelfish you get 'Position de Polonais'... I think it's hilarious... from a French point of view. |
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dmichel
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Joined: 04 Apr 2002
Posts: 1166
Location: France
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| Posted: Sun Jul 23, 2006 11:27 am Post subject: |
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Yup, it uses page flipping.
The next version will support 16-bit display (32-bit right now) may be this will help on older cards.
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David Michel |
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Chris
Regular
Joined: 19 Apr 2002
Posts: 125
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| Posted: Mon Jul 31, 2006 1:59 am Post subject: |
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seems my card/driver can't handle "WaitForVerticalBlank(ddraw, DDWAITVB_BLOCKBEGIN, NULL);" well..
also i heard this call is not comparable with (specially low-res) all the custom resolutions
the problem is when V-sync is enabled screen is syncronized by only top half (bottom screen tearing heavily)
..maybe something to do with doublescan ? as it only happens in low-res mode like 320x240...(640x480 is o.k.)
if you are going to support custom resolution, then this is going to be an issue
only flip call "Flip(NULL, DDFLIP_WAIT);" works fine with all the custom resolution for some reason.
take care |
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clockwise
Visitor
Joined: 31 Jul 2006
Posts: 1
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| Posted: Mon Jul 31, 2006 5:40 am Post subject: |
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same here, with Vsync on, screen is still breaking up or tearing on my Voodoo 4 as well (v1.00-DirectX) , however in my case both either v-sync enabled or disabled ,scrolling is smooth as baby's butt in old version (0.96)
so my advice : just stick with old version if you don't like tearing  |
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