Re: Blurry/flickery NSImage animation in ScreenSaverView
Re: Blurry/flickery NSImage animation in ScreenSaverView
- Subject: Re: Blurry/flickery NSImage animation in ScreenSaverView
- From: Jérôme Paschoud <email@hidden>
- Date: Fri, 29 Mar 2002 22:09:58 +0100
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Hi all,
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I'm playing around with a screen saver which creates an NSImage from an
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image file on disk, then moves that image around the screen. The
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animationTimeInterval is 1/30.0, and the image is moved up and right (or
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whatever) by one pixel each time animateOneFrame: is called. That's all
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fine.
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The problem is that the animation is blurry, or very flickery if I increase
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the distance the image is moved each time. I'm unsure as to how to fix the
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problem. I've tried reducing the animationTimeDelay, and also creating
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another NSImage then doing the compositing onto it, then drawing that image
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onto the ScreenSaverView subclass. The blur/flicker persists regardless.
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I'd appreciate any advice - I've uploaded my project's source as well as the
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built version of the screen saver, and a suitable sample image as well as a
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text file explaining the problem. It's all in a StuffIt archive (72k) at the
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URL below. Any help would be much appreciated. Note that the project file
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was created in PB 1.1.1, so I believe you'll need that version of PB to read
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it.
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Here's the archive:
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<http://www.scotlandsoftware.com/temp/src/helpneeded.sit.hqx>
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I realise that a screen saver is hardly very important, but I'd be grateful
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for any enlightenment anyone could offer. :-)
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Thanks for reading,
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-Matt
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--
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Matt Gemmell
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Scotland Software
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<http://www.scotlandsoftware.com/>
Hi
I just read your post and instead of bringing you any solution, I'll ask you
something. I'm playing with a screen saver too but I hardly don't know how
to create a configuration pane for it. Could you tell me where you find an
explanation or could you explain it to me directly.
@+ Jerome
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