Bug in frame_edges example while using multithreaded?

[bram12]

hi,

I was using the frame edges examples found on: http://www.imagemagick.org/Usage/thumbnails/#frame_edge and downloaded the script http://www.imagemagick.org/Usage/script ... ges.tar.gz

That was working fine until I switched to a multithreaded environment for image magick. Now some images/borders are distorted.

Try:
- Go to http://www.freeonlinephotoeditor.com
- click on effects
- click on golden frame
- now the left and top border have some distortions.

Any ideas how to solve/fix that? Strange thing is... try adding a second border (same golden one) and then it is ok??

[magick]

We need to reproduce the problem in our local environment. What is the command sequence you are using to create the framed effect? Also, which version of ImageMagick are you using?

[bram12]

version 6.4.8-9

in php I am using:
exec('/www/www.freeonlinephotoeditor.com/htdocs/scripts/frame_edges gold '.extractname($_REQUEST["imageFileName"]).' > '.$imagesurse.'');

frame edges script and images can be found here: http://www.imagemagick.org/Usage/script ... ges.tar.gz

[magick]

We tried the command with ImageMagick 6.4.9-6, the current release, and it works fine. Type

identify -version

Does it include OpenMP in the output? We're wondering if its a transient bug in the OpenMP implementation of ImageMagick. Any chance you can download / install ImageMagick 6.4.9-6?

[bram12]

Version: ImageMagick 6.4.8-9 2009-01-29 Q16 OpenMP http://www.imagemagick.org

I probably can not get a new version installed.

The environment is exactly the same only now multithreaded enabled and that produces this bug. Everything else seems to work ok.

[magick]

Set the MAGICK_THREAD_LIMIT environment variable to 1 and see if that fixes the problem.

[bram12]

Set the MAGICK_THREAD_LIMIT environment variable to 1 and see if that fixes the problem.

Can I just edit the XML or do I need to restart something??

It seems I have no rights to change the configure.xml, so I will ask my hoster.

[bram12]

I will reply when I can test this. Tomorrow I away the whole day.

[magick]

You should be able to set the environment variable in your web script.

[bram12]

You should be able to set the environment variable in your web script.

how??

[anthony]

if calling from php, to run imagemagick from a bash shell use...

Code: Select all

  system("MAGICK_THREAD_LIMIT=1 convert .....");

[bram12]

I did the test by setting the thread limit to 1 in the configure.xml.

And then I still had some strange artifacts, but a lot less.

I will ask my hoster to upgrade ImageMagick, but they are only able to do that next week.

[bram12]

if calling from php, to run imagemagick from a bash shell use...

Code: Select all

  system("MAGICK_THREAD_LIMIT=1 convert .....");

Anthony,

is it also possible to add it in your frame_edge script??

I tried adding: MAGICK_THREAD_LIMIT=1 to the script, but that does not seem to work?

[anthony]

It only happens on specific versions of IM where threaded use was still getting fixed properly.
You can use it on my script the same way
system("MAGICK_THREAD_LIMIT=1 frame_script ....");

The syntax is BASH shell syntax. for other shells you may need to use

system("env MAGICK_THREAD_LIMIT=1 frame_script ....");

'env' is a command that also modifies the environemnt before running the command given (first item without an '=' in it) the BASH form is just a short cut (and slightly faster)

[bram12]

Thx, I added that and it works, but there is still some strange artifacts on the image.

Try the 2 different settings
- On http://www.freeonlinephotoeditor.com It is multithreaded. Repeat it bij going to 'effects' and then 'golden frame'.
- On http://www.fotoaanpassen.nl I added the MAGICK_THREAD_LIMIT=1. Do the same thing by going to 'effecten' and then 'Gouden Lijst'.

So still some strange noise in the image on a single thread.