| Re: Problem creating .png file using Coyote graphics (or maybe problem with cgHasImageMagick?) [message #94564 is a reply to message #94563] |
Sat, 08 July 2017 19:09   |
Jim Pendleton
Messages: 165
Registered: November 2011
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Senior Member |
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On Saturday, July 8, 2017 at 2:25:49 PM UTC-6, Barry Lesht wrote:
> I've been trying to track down a problem I've encountered when attempting to output a graphics file (png) using the Coyote graphics cgControl procedure. I've done this many times in the past without problems, but now have updated to IDL8.6 as well as to MacOS10.12.5 and what used to work no longer does.
>
> The problem seems simple. I generate a plot in a Coyote graphics window. I can use the "Save Window As" feature from the window File menu and successfully create a .png file. When I do this, I get the expected command window message "Output will be created here:" However, when I try to do the same thing from within the plotting procedure using the cgControl, /PS_DECOMPOSED, OUTPUT='~filname.png' command, nothing happens - no confirming message, no .png file.
>
> I thought there might be a problem with ImageMagick so I tried cgHasImageMagick and got
>
> IDL> cgHasImageMagick(VERSION=whatVersion)
> 1
> IDL> whatVersion
> % Attempt to call undefined procedure: 'WHATVERSION'.
> % Execution halted at: $MAIN$
>
> which seems strange.
>
> When I try invoking convert directly using SPAWN, I get
>
> IDL> spawn, 'convert -version', thisVersion, err_code
> IDL> thisVersion
> Version: ImageMagick 6.9.8-10 Q16 x86_64 2017-07-08 http://www.imagemagick.org
> Copyright: © 1999-2017 ImageMagick Studio LLC
> License: http://www.imagemagick.org/script/license.php
> Features: Cipher DPC Modules
> Delegates (built-in): bzlib djvu fftw fontconfig freetype gslib jbig jng jp2 jpeg lcms ltdl lzma openexr png ps tiff webp x xml zlib
>
> which looks fine.
>
> I'm wondering if anyone else has had a similar problem and if so, how they fixed it. Now that David is retired I'm hoping someone else might be able to help.
>
> Thanks.
The source code for cghasimagemagick is here:
http://www.idlcoyote.com/programs/cghasimagemagick.pro
If !os.version is "DARWIN", you won't get a version number back. Coyote can be like that. Maybe the output from ImageMagick has been changed in its latest version to appease him.
As far as the other aberrant behavior, you might need to step through the code.
Jim P.
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