Applying Alpha channel as softmask when placing Image in Indesign

[DenisKrumov]

Hi guys!

I am trying to write a simple extend script which activates alpha mask of an imported image in InDesign.

As far as I know the only way to do it is to activate it in the place image options so I am re-placing the file again. I take the name of the alpha mask I need, but I cannot find how to activate it.

I read in the documentation about javascripting the folowing:

    place (fileName:File, [showingOptions:Boolean=Boolean], withProperties:Object) , but I cannot find the construction of the Object for the withProperties value.

I guess that this withProperties object is ImageIOPreferences object so I managed to create  a script with which I display the values of the object ImageIOPreferences of an already imported image, but it only displays the values, and not the names of the properties.

var Doc = app.activeDocument
var DocPics = app.selection
if (DocPics.length>0) {
    for (i=0;i<DocPics.length;i++)  {
        if (DocPics[i].constructor.name=="Image") {
            var Pic = DocPics[i]
            var PicBox = Pic.parent
            }
        else {
            var PicBox = DocPics[i]
            var Pic = PicBox.images[0]
            }
    }

for (x in Pic.imageIOPreferences) {
    txt += Pic.imageIOPreferences[x] + " ; ";
  };
  alert(txt)
}

Does anybody know how I can find the construction of the withProperties object so I can activate the alpha mask while placing the image?

Greetings and thanks in advance,

Denis.

[BarlaeDC · Accepted solution]

Hi,

Is this not what you are looking for - https://community.adobe.com/t5/indesign/set-placed-image-alpha-channel/td-p/4983226

Malcolm