History Brush Blending Mode

Give a look to this.

Is it possible to script brush opacity?

I think you can use this with any brush kind tool. Just create a preset tool (they contain: all brush vars + all tool properties)

// first, prepare your historybrush tool and use this to save its preset name (or save it directly on the tool properties);
save_preset("AAAA");

// then, use this wherever you want to get the preset (including belending mode)
app.currentTool = "historyBrushTool"; // select historybrush
select_preset("AAAA");

// function to create the preset tool
function save_preset(name) {
    try {
        var desc21 = new ActionDescriptor();
        var ref18 = new ActionReference();
        ref18.putClass( stringIDToTypeID( "toolPreset" ) );
        desc21.putReference( charIDToTypeID( "null" ), ref18 );
        var ref19 = new ActionReference();
        ref19.putProperty( charIDToTypeID( "Prpr" ), charIDToTypeID( "CrnT" ) );
        ref19.putEnumerated( charIDToTypeID( "capp" ), charIDToTypeID( "Ordn" ), charIDToTypeID( "Trgt" ) );
        desc21.putReference( charIDToTypeID( "Usng" ), ref19 );
        desc21.putString( charIDToTypeID( "Nm  " ), name );
        executeAction( charIDToTypeID( "Mk  " ), desc21, DialogModes.NO );
    } catch(e) { }
}
// function to select the preset tool
function select_preset(name) {
    try {
        var desc = new ActionDescriptor();
        var ref = new ActionReference();
        ref.putName( stringIDToTypeID( "toolPreset" ), name );
        desc.putReference( charIDToTypeID( "null" ), ref );
        executeAction( charIDToTypeID( "slct" ), desc, DialogModes.NO );
        ref = null;
        desc = null;
    } catch(e) { }
}

I'm having a similar issue – I would like to switch the blend mode of a brush from Normal to Clear.  I know that the shortcuts do that, but my goal is to be able to record the action and since this event is not recordable… here I am asking for help.

It would be grate to find a solution or a work around.

I've tried:

1. Script listener - doesn't work, no event is captured

2. Actions - do not record

3. and I looked through the reference guide for photoshop JS scripting for sample code that I could rework (I'm no programmer)

4. Of course Google search but nothing there

The closest thing I found was this: toggle brush mode 'Behind' on/off with keyboard shortcut? But the scrip is no longer available…

I was thinking of an alternative… if there's a ways to write a script that executes the keyboard shortcut that may do the trick, but I've not fount any way of doing that with code.

Any help would be greatly appreciated.

Cheers,

C

In post 11 xbytor provides a link to an archived version of ps-scripts.com:

PS-Scripts.com temporarily suspended?

I think if you set a tool preset for the history brush with the blending mode you want.  You could use scriptlistener action manager code to select the preset by preset name. The would select the history brush tool with the settings you want.

There are few Photoshop scripting resources on the web. Only a few Photoshop Books will cover Photoshop in any depth.

Adobe has some documentation on the web over years I have downloaded some of their documents.

Ps-Scripts.com is dead, did this happen recently, can anyone verify ? If so the only source for scripting in Photoshop is the Adobe communities.