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Re: Backing store issue [message #48140 is a reply to message #47993]

Mon, 27 March 2006 11:41

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Jonathan Joseph writes:

> Technology-schmology. It's speed I'm interested in. I use app_scroll
> in another application that will view the same images without any
> problems, and the scrolling is *MUCH* slower if you have any reasonably
> sized viewing window - like 1000 x 1000 pixels.

When scrolling, usually only a *few* rows or columns need
to be drawn. Most of what you need is already on the display,
it just has to be moved with DEVICE COPY. Surely, *this*
is fast enough! :-)

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/

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[Message index]

		Backing store issue By: Jonathan Joseph on Mon, 27 March 2006 10:56
		Re: Backing store issue By: Karl Schultz on Tue, 28 March 2006 11:31
		Re: Backing store issue By: Paul Van Delst[1] on Tue, 28 March 2006 10:45
		Re: Backing store issue By: K. Bowman on Tue, 28 March 2006 10:24
		Re: Backing store issue By: Karl Schultz on Tue, 28 March 2006 10:03
		Re: Backing store issue By: liamgumley on Tue, 28 March 2006 08:59
		Re: Backing store issue By: Jonathan Joseph on Mon, 27 March 2006 14:44
		Re: Backing store issue By: Karl Schultz on Mon, 27 March 2006 13:48
		Re: Backing store issue By: Jonathan Joseph on Mon, 27 March 2006 13:20
		Re: Backing store issue By: David Fanning on Mon, 27 March 2006 12:58
		Re: Backing store issue By: Jonathan Joseph on Mon, 27 March 2006 12:40
		Re: Backing store issue By: David Fanning on Mon, 27 March 2006 12:36
		Re: Backing store issue By: Jonathan Joseph on Mon, 27 March 2006 12:24
		Re: Backing store issue By: David Fanning on Mon, 27 March 2006 11:41
		Re: Backing store issue By: Jonathan Joseph on Mon, 27 March 2006 11:37
		Re: Backing store issue By: David Fanning on Mon, 27 March 2006 11:23

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