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Re: Backing Store Question [message #45463 is a reply to message #45456]

Fri, 16 September 2005 07:31

R.G. Stockwell
Messages: 363
Registered: July 1999

Senior Member

"David Fanning" <davidf@dfanning.com> wrote in message
news:MPG.1d947822e772a52c989a86@news.frii.com...
> Folks,
>
> In poking around in the IDL documentation this morning, I came
> upon this in the WIDGET_DRAW documentation:
>
> On some systems, when backing store is provided by the
> window system (RETAIN=1), reading data from a window
> using TVRD( ) may cause unexpected results. For example,
> data may be improperly read from the window even when
> the image displayed on screen is correct. Having IDL
> provide the backing store (RETAIN=2) ensures that the
> window contents will be read properly.
>
> Anybody have any idea which systems this is taking about?

The Commodore 64?

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		Re: Backing Store Question By: Michael Wallace on Fri, 16 September 2005 11:32
		Re: Backing Store Question By: Rick Towler on Fri, 16 September 2005 11:09
		Re: Backing Store Question By: R.G. Stockwell on Fri, 16 September 2005 07:31

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