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Re: Jpeg in a .sav file [message #59241]

Thu, 13 March 2008 17:05

Rick Towler
Messages: 821
Registered: August 1998

Senior Member

Dan Larson wrote:

> am I missing something here, in terms of IDL design? Is there some
> philosophical reason why one *shouldn't* want to include an embedded
> image in a .sav file?

No. I can't see any philosophical reason why and there are no general
technical reasons why one couldn't do this. I can't think of any
specific technical hurdles for IDL except that it would (probably)
require a change to the .sav file format breaking forward compatibility.

There are certainly cases where this would be useful. Embedding logos
or icons is one, or LUT's or... Sometimes you want to distribute an
application with data that is not accessible to the user so packaging
them with image files or .dat files or even other .sav files isn't
ideal. Though without further changes to the .sav file format data
stored in a "hybrid" format wouldn't be protected whereas now at least
the data is obfuscated inside a function.

I doubt any of the reasons would justify breaking forward compatibility.
For the 10 users ITT makes happy, there will be hundreds bent that
they can no longer load IDL 8 .sav files in their older versions. So I
think that variations on the hack I posted are going to be the only
route, for now.

-Rick

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[Message index]

		Re: Jpeg in a .sav file By: Rick Towler on Thu, 13 March 2008 17:05
		Re: Jpeg in a .sav file By: David Fanning on Thu, 13 March 2008 15:24
		Re: Jpeg in a .sav file By: Dan Larson on Thu, 13 March 2008 14:05
		Re: Jpeg in a .sav file By: David Fanning on Thu, 13 March 2008 13:53
		Re: Jpeg in a .sav file By: mmiller3 on Thu, 13 March 2008 13:37
		Re: Jpeg in a .sav file By: Rick Towler on Thu, 13 March 2008 13:16
		Re: Jpeg in a .sav file By: David Fanning on Thu, 13 March 2008 10:33

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