Photoshop Javascript : load selection of opaque pixels but not the transparent pixels.

Question

Photoshop Javascript : load selection of opaque pixels but not the transparent pixels of a layer.

I really despair to achieve this in a simple javascript script.

I kinda understood I needed to first load a channel, and then perform a selection from this channel, but I just failed doing this. I don't know how to get the corresponding channel that contains the transparent pixels of the current layer.

The original file is a PNG, it has a single layer.

There is no alpha channel, only R, G and B, although the image has transparent areas.

When I go to select, load Selection, Photoshop suggests by default a channel called layer_name+" Transparency",

therefore I tried something like:

doc.selection.load(doc.channels[layer_name + "Transparency"], SelectionType.EXTEND);

But this just failed.

I think I don't understand the way I am supposed to work with selections and channels

Thanks for any help!

Bill

Kukurykus · Accepted Answer

sTT = stringIDToTypeID;(ref1 = new ActionReference()).putProperty(c = sTT('channel'), sTT('selection'));(dsc = new ActionDescriptor()).putReference(sTT('null'), ref1);(ref2 = new ActionReference()).putEnumerated(c, c, sTT('transparencyEnum'))dsc.putReference(sTT('to'), ref2), executeAction(sTT('set'), dsc);

JJMack · Answer

A Selection includes feathering It may well not a B/W cutout there the gray area. Its a grayscale channel

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