layer mapping problem : from gds to dxf

sunny.etic

Hi,
I use layer map like: 1:Outline to read my original gds file into Klayout.
I would like to save it as dxf format. Suppose I would see the layer Outline on AutoCad.
But I show me layer name : L1D0_Outline for L1 of gds layer.
Is it possibe to do without the prefix L1D0 after the gds 2 dxf conversion.

By the way, do Klayout got command line for gds2dxf conversion now ?

:)

Matthias

Hi Sunny,

there is no simple way to remove the "LxDy" prefix currently. KLayout uses that prefix to preserve the information from the GDS file. When you read a DXF file, it will translate that prefix back into layer/datatypes, so you don't need to provide conversion tables for a GDS/DXF round trip. But AutoCAD will of show the layer with the prefix.

You can force KLayout to forget the layer/datatype by removing that information from the layer info (Edit/Layer/Edit Layer Specification: clear layer and datatype). In that case, the pure layer name is taken.

If you are looking for a command-line way to do the conversion, you can consider using a script. You can run KLayout in batch mode. The script can also translate the layers and strip the layer/datatype information.

There is a thread about that here: http://klayout.de/forum/comments.php?DiscussionID=173.

Matthias

sunny.etic

Thank you for your reply. I will try them.

sunny.etic

Hi Mattjias,

I read some API documents about how to read/write layout in a script Already. Could you kindly give some hint or draft about how to strip layer/datatype inform ?

Best regards,
Sunny

Matthias

Hi Sunny

Here is some code (not tested):

# the mapping table
mapping = { 
  [10, 0] => "METAL1",   # layer 10, dataype 0 -> "METAL1"
  [11, 0] => "VIA",      # etc.
  [12, 0] => "METAL2"
}

# read file    
lay = RBA::Layout.new
lay.read("myfile.gds")

# use the mapping table to get and install the name
# without layer/datatype info
lay.layer_indices.each do |li|
  info = lay.get_info(li)
  name = mapping[[info.layer, info.datatype]]
  name && lay.set_info(li, RBA::LayerInfo::new(name))
end 

# save as DXF
opt = RBA::SaveLayoutOptions.new
opt.format="DXF"
lay.write("myfile.dxf", false, opt)

Matthias