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Re: IDL/MSWin pixmap limitations, Part 2 [message #33054]

Mon, 25 November 2002 11:30

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Craig Hamilton (someone@microsoft.com) writes:

> So, it looks like the software solution you mention below wouldn't work for
> switching rapidly between animations, right? I want an instantaneous change
> from a 30 frame cineloop (1024x512) to one of 15 other ones the same
> size....

Depending upon how fast we want animations to be,
we can switch between what we call "retained" pixmaps
(I.e., real pixmaps) and "non-retained" pixmaps (those
that have no real window associated with them). Most
of the time, with retained pixmaps, we have to turn
the animation speed down because the animation occurs
too rapidly. We find that for the satellite images
we are working with that animations in non-retained
mode are perfectly adequate for our purposes, so this
has been a good solution for us.

In any case, the system is flexible enough that
we can turn retained and non-retained pixmaps on and
off at will, so we can monitor window resources (after
a fashion) and alert the user if the animation size
they have requested (for example) is too large for
retained pixmaps. They have the option then of reducing
the size of the animation (either window size or number
of frames), or using non-retained pixmaps.

Users who are used to PCs understand there are trade-offs. :-)

Cheers,

David

--
David W. Fanning, Ph.D.
Fanning Software Consulting, Inc.
Phone: 970-221-0438, E-mail: david@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155

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[Message index]

		Re: IDL/MSWin pixmap limitations, Part 2 By: David Fanning on Mon, 25 November 2002 11:30
		Re: IDL/MSWin pixmap limitations, Part 2 By: Pavel A. Romashkin on Mon, 25 November 2002 11:04
		Re: IDL/MSWin pixmap limitations, Part 2 By: Rick Towler on Mon, 25 November 2002 09:55
		Re: IDL/MSWin pixmap limitations, Part 2 By: Craig Hamilton on Mon, 25 November 2002 09:45
		Re: IDL/MSWin pixmap limitations, Part 2 By: David Fanning on Mon, 25 November 2002 08:53

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