Access to Layer Comp Information about psd.rb HOT 11 CLOSED

There is now as of v0.4.0 :)

PSD.open('examples/images/example.psd') do
  puts resources[:layer_comps].data
end

# Outputs
{:class=>{:name=>"", :id=>"CompList"},
 "list"=>
  [{:class=>{:name=>"", :id=>"Comp"},
    "Nm  "=>"Version A",
    "compID"=>692243163,
    "capturedInfo"=>1},
   {:class=>{:name=>"", :id=>"Comp"},
    "Nm  "=>"Version B",
    "compID"=>725235304,
    "capturedInfo"=>1},
   {:class=>{:name=>"", :id=>"Comp"},
    "Nm  "=>"Version C",
    "compID"=>730932877,
    "capturedInfo"=>1}]}

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I should add that, while it's now possible to get the layer comp names, I haven't discovered how to get the layers associated with each comp yet. Hopefully soon.

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Thanks meltingice! I'll keep an eye out for it.

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Reopening this because I just discovered, with 98% certainty, where the layer comp data is. It's hidden within the shmd layer info block. According to the spec, there is a variable amount of "undocumented data" at the end of the shmd block. Inspecting this data reveals a Descriptor that contains a list named compList. This compList holds the IDs of the layer comps to which the layer belongs.

Working on it now.

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{:class=>{:name=>"", :id=>"null"},
 "origFXRefPoint"=>
  {:class=>{:name=>"", :id=>"null"}, "Hrzn"=>0.0, "Vrtc"=>0.0},
 "LyrI"=>22,
 "layerSettings"=>
  [{:class=>{:name=>"", :id=>"null"},
    "enab"=>true,
    "blendOptions"=>{:class=>{:name=>"", :id=>"null"}, "Md  "=>"passThrough"},
    "compList"=>[692243163]},
   {:class=>{:name=>"", :id=>"null"}, "compList"=>[725235304]},
   {:class=>{:name=>"", :id=>"null"}, "enab"=>true, "compList"=>[730932877]},
   {:class=>{:name=>"", :id=>"null"}, "enab"=>true, "compList"=>[0]}]}

Was able to get the data parsed. Just need to organize it in a useful and easy to get fashion.

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Fantastic! I think I can finally port some slow Photoshop plugin code. 👍

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Any chance you could divulge some information about your use case? Trying to figure out the best way to represent this data.

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Sure. I currently generate redlines for our comps using a Photoshop script. It iterates over layer comps and creates a meta-data layer overlaying type and size information for various layers. Both a non-annotated and annotated PNG is then exported.

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Oh!, Great!
I also have some slow scripts that use layer comps
👍

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So I've implemented a method for filtering based on layer comps:

tree = psd.tree.filter_by_comp('Version A')
tree.to_hash

The filter_by_comp method takes a comp ID, a comp name, or :last for the last document state. It returns a new tree that only contains the layers/groups that are included in the comp, so you can traverse it as needed.

Still need to write tests before I merge it into master.

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Going to close this since layer comp information is now available. To access, use psd.layer_comps to get a hash of comps. You can also use the method from the previous post to generate a new tree based on a comp. Generating previews based on layer comps is hopefully coming soon.

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