How to invert an Alpha Channel in JS

Question

Hey Guys and Gal's,I have a selected channel that I'm looking to invert but I'm not seeing to have any luck.I've tried the below (Inverting the Red Channel in this case)app.activeDocument.activeChannels = [app.activeDocument.channels[0]];  app.activeDocument.activeLayer.invert();  app.activeDocument.activeChannels = [app.activeDocument.channels[0],app.activeDocument.channels[1],app.activeDocument.channels[2]]; I've also tried app.activeDocument.activeChannels.invert(); but also to no avail. I even tried it in an action and it failed. can anyone direct me to the best way of doing this?Thanks.

Chuck Uebele · Accepted Answer

var idslct = charIDToTypeID( "slct" );
    var desc2 = new ActionDescriptor();
    var idnull = charIDToTypeID( "null" );
        var ref1 = new ActionReference();
        var idChnl = charIDToTypeID( "Chnl" );
        var idChnl = charIDToTypeID( "Chnl" );
        var idRd = charIDToTypeID( "Rd  " );
        ref1.putEnumerated( idChnl, idChnl, idRd );
    desc2.putReference( idnull, ref1 );
executeAction( idslct, desc2, DialogModes.NO );
var idInvr = charIDToTypeID( "Invr" );
executeAction( idInvr, undefined, DialogModes.NO );

Or

var doc = activeDocument;
doc.channels.activeChannel= doc.channels[0]
var idInvr = charIDToTypeID( "Invr" );
executeAction( idInvr, undefined, DialogModes.NO );

dominique filiol · Answer

BonjourForgive me Chuck Uebele?DiefishYou have a fault on this line (03):channel s instead of channelsapp.activeDocument.channel s [2]];app.activeDocument.channels [2]] it's better !

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