I'm with Stuart, gerbv is the ticket, since it can used GTK_XOR. We do this all the time in IC's, and you don't need a full-blown LVL tool. You just do an XOR of layers and create an XOR DRC deck that flags any shapes that have changed. Stuart Brorson 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 > ------------------------------------------------------------------ > To unsubscribe from si-list: > si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field > > or to administer your membership from a web page, go to: > //www.freelists.org/webpage/si-list > > For help: > si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field > > > List technical documents are available at: > http://www.si-list.net > > List archives are viewable at: > //www.freelists.org/archives/si-list > or at our remote archives: > http://groups.yahoo.com/group/si-list/messages > Old (prior to June 6, 2001) list archives are viewable at: > http://www.qsl.net/wb6tpu > > > > > ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List technical documents are available at: http://www.si-list.net List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu