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Re: max # pixmaps in MSWin IDL 5.5? [message #31893 is a reply to message #31887]

Mon, 26 August 2002 15:42

Dick Jackson
Messages: 347
Registered: August 1998

Senior Member

Hi Dave,

"David Fanning" <david@dfanning.com> wrote in message
news:MPG.17d2c7f3f8fbd16398997a@news.frii.com...
> Craig Hamilton (someone@microsoft.com) writes:
>
>> I want to allocate a lot of pixmaps using
>> window,/pixmap,xsize=128,ysize=128,/free
>>
>> Is there a limit to the number of pixmaps using IDL 5.5
>> under MSWindows 2000? I get an 'unable to create pixmap'
>> error after !d.window reaches 364 (although this number varies).
>>
>> I have 768MB of RAM, so I am not running out of memory. So far
>> in the docs, I have just found that it says you can create 'a large
>> number' of pixmaps.
>
> The reason for the hand-waving is that the number of pixmaps
> you can create is a function of your graphics card and how
> "smart" it is.
>
> To get around this limitation, I use unmapped draw widgets
> (wrapped up in an object, of course, for easy accessibility).
> You can have a lot more of these kinds of windows than you
> can have pixmaps, and they serve exactly the same function.

Really?! That's gotta be the best idea I've heard in a while! I guess
you wrote TV, TVRD and "Device, Copy" methods for handy I/O? I've been
pushing some unpredictable limits with pixmaps lately, and your idea
might be just the ticket. Sounds easy enough to write, just thought I'd
ask if I'm on the right track.

Cheers,
--
-Dick

Dick Jackson / dick@d-jackson.com
D-Jackson Software Consulting / http://www.d-jackson.com
Calgary, Alberta, Canada / +1-403-242-7398 / Fax: 241-7392

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[Message index]

		Re: max # pixmaps in MSWin IDL 5.5? By: Pavel A. Romashkin on Tue, 27 August 2002 13:15
		Re: max # pixmaps in MSWin IDL 5.5? By: David Fanning on Tue, 27 August 2002 09:14
		Re: max # pixmaps in MSWin IDL 5.5? By: Liam E. Gumley on Tue, 27 August 2002 07:40
		Re: max # pixmaps in MSWin IDL 5.5? By: David Fanning on Mon, 26 August 2002 18:09
		Re: max # pixmaps in MSWin IDL 5.5? By: Dick Jackson on Mon, 26 August 2002 15:42
		Re: max # pixmaps in MSWin IDL 5.5? By: David Fanning on Sun, 25 August 2002 10:55

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