How to flatten a gds/oas file?

Hi Ram,

There is a support article that should be covering what you ask for : 

XStream In: Is there a way to flatten top cell layout during File Import Stream?

This one might be useful in case you want to do the opposite :

How to generate flat GDS data from layout using XStream Out or strmout

Cheers,

Aurélien

I need to flatten the gds/oas db before I could stream in so that the stream-in process don’t mess up the library creating many different cells/views for the design hierarchy. I've seen the article, but it seems like they are flattening the db after streaming in, which fails what i'm trying to achieve here.

You could either:

1. Stream in (with the flatten code) into a temporary library and then copy the top cell out afterwards, and then delete the temporary library
2. Modify the code in the first article that Aurélien mention to traverse the hierarchy, collect all the cellViews used, and then delete them after flattening (have to be careful to only delete those in the same library just in case you have references from other libraries). 

I think the first approach is safer. After all, how often are you likely to need to do this - it doesn't sound too onerous to me.

Andrew

You could either:

1. Stream in (with the flatten code) into a temporary library and then copy the top cell out afterwards, and then delete the temporary library
2. Modify the code in the first article that Aurélien mention to traverse the hierarchy, collect all the cellViews used, and then delete them after flattening (have to be careful to only delete those in the same library just in case you have references from other libraries). 

I think the first approach is safer. After all, how often are you likely to need to do this - it doesn't sound too onerous to me.

Andrew