FreeLists / si-list / [SI-LIST] Re: Comparing layers on two artworks

[Stuart Brorson <sdb@xxxxxxxxxx>]

On Wed, 16 Apr 2008, Nima Lotfi wrote:
> Thanks everyone for your suggestions!   I'm looking for an automated
> approach to add to our verification steps.   I often envy software
> developers who have many text file compare tools such as beyond compare.
> Visual checking is not practical with number of signal we have.

That's where the power of unix/Linux helps out.  The gerbv stuff is
tested nightly using scripts which compare newly rendered Gerber files
against pre-existing "golden" ones.  Differences between the
newly rendered image and the golden one are automatically flagged
using the script, so no human intervention is required.
Here's the script:

http://gerbv.cvs.sourceforge.net/gerbv/gerbv/test/run_tests.sh?revision=1.5&view=markup

Maybe this will give you some ideas about how to use gerbv/ImageMagick
to perform your task.

Cheers,

Stuart
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