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  Page flipping and screen tearing  (Read 1798 times)
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Offline onlytoine

Senior Newbie





« Posted 2011-03-18 13:50:45 »

Hello,

I'm experimenting some graphics settings and I'm currently playing with the frame rates.

My active rendering is based on page flipping offered by java 6.

What I noticed is when I set the frame rate to 25 FTS, it is ok (but not very smooth). When I set it to 50 FTS, I noted that -sometimes- screen tering effects occured.

I believed this kind of effect was not possible using page flipping?

Do you already experience that?  Huh

Regards,
Toine
Offline onlytoine

Senior Newbie





« Reply #1 - Posted 2011-03-18 14:07:14 »

hmmm

when I print out the DisplayMode.getRefreshRate(), it returned "1"... Normal ?  Huh
Offline onlytoine

Senior Newbie





« Reply #2 - Posted 2011-03-18 14:27:32 »

Hmm... The computer I used to test has a very poor graphic card and windows is using the standard driver to work with it...

I think the problem is coming from that.

Toine
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Offline IronclawsBt

Junior Duke


Medals: 1



« Reply #3 - Posted 2011-03-18 14:51:26 »

Are you sure its using page flipping? BufferStrategy will try to use page flipping, but if the hardware does not support it it will use blitting. You can find out by getting the BufferCapabilities from the BufferStrategy.

It's not what you know, it's what other people think you know.
Just hope you don't get quizzed on it.
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Offline onlytoine

Senior Newbie





« Reply #4 - Posted 2011-03-18 15:25:53 »

You're right:

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createBufferStrategy(2);
strategy = getBufferStrategy();
final BufferCapabilities capabilities = strategy.getCapabilities();
System.out.println("PageFlipping:" + capabilities.isPageFlipping());
System.out.println("MultiBufferAvailable: " + capabilities.isMultiBufferAvailable());
System.out.println("FullScreenRequired:" + capabilities.isFullScreenRequired());

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PageFlipping:false
MultiBufferAvailable: false
FullScreenRequired:false


Toine
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