How to changing the library name of GDS by Ruby Script

Aaron_C

Dear All,

I would like to know what command can change the name of the library name in the ruby script, because what I save have the same library name "LIB".

Looking for your reply.

Thanks very much

Aaron

Aaron_C

Can I save a GDS file with a different library name for example "waveguide" but not “LIB”

Matthias

Hi Aaron,

the solution is the two-argument version of "Layout#write" which takes a SaveLayoutOptions object:

layout = ... # a RBA::Layout with your data
opt = RBA::SaveLayoutOptions::new
opt.gds2_libname = "waveguide"
opt.format = "GDS2"
layout.write("myfile.gds", opt)

Matthias

Aaron_C

I really appreciate your help, Matthias

lukasc

Related question.

When I open a GDS, and check the File > Layout Statistics, I see "Library name: mentor.db", for example. Is there a way to access this in the script (presumably yes, since this GUI has this information). I note that the Layout object has "dbu", which is in this GUI, but I can't find the Library name.

thank you

Lukas

Matthias

Hi Lukas,

the library name is part of the layout's "metadata". Metadata are additional pieces of information that the reader delivers and is kept along with the geometrical data, but it cannot be changed currently.

If you want to give a GDS file a specific library name you have to set the library name in the writer options.

Matthias

lukasc

Hi Matthias,

I don't want to change it. I just want to read it. Is the metadata available as read-only?

thank you.

Matthias

Hi Lukas,

the discussion title says "How to changing the library name ..." :-)

But sorry, the "meta data" is rather hidden currently. So you cannot read it through script now. It's on my TODO list, but this will require some refactoring.

Matthias