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Re: backing store [message #44557 is a reply to message #9913]

Tue, 28 June 2005 08:27

Rick Towler
Messages: 821
Registered: August 1998

Senior Member

Kenneth Bowman wrote:
> "KK T" wrote:
>
>> Good day,
>>
>> Does anyone know what is a backing store ?
>> I had encountered a couple of prompt where I load a huge array (20000
>> by 20000) of data to draw_widget and using TV command
>>
>> "unable to allocate memory for backing store. Window closing"
>>
>> Is there any way for to increase the size of backing store?
>>
>> Kok Kiang
>
>
> Backing store is where the graphics device stores copies of windows (bitmaps).
> Backing store makes it possible to cover and uncover windows quickly.
>
> You are requesting about 400 MB of backing store.
>
> You should start by looking at the RETAIN keyword to the DEVICE procedure or
> look up backing store in the documentation index.

And I might add that I doubt that the backing store is your real issue
since most graphics devices will not be able to draw a 20000x20000
bitmap regardless of what you backing store is set to.

You will need to either break this image up or down sample using REBIN
or CONGRID.

-Rick

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[Message index]

		Backing store By: thompson on Thu, 11 September 1997 00:00
		Re: backing store By: davidf on Wed, 04 March 1998 00:00
		Re: backing store By: Rick Towler on Tue, 28 June 2005 08:27
		Re: backing store By: KK T on Wed, 29 June 2005 01:45
		Re: backing store By: K. Bowman on Tue, 28 June 2005 07:15
		Re: backing store By: Rick Towler on Wed, 29 June 2005 08:50

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