Is this possible via Script...!

Report · Feb 10, 2016

Hi Everyone!,

Transform(Professional) the channel mask based on the two guides(Top and Bottom) and center to product.

I have one channel named as "Alpha 1" and I need to transform the channel based the guides.

Please help out this problem or give suggestion to proceed further.

-yajiv

Report · Feb 10, 2016

Could you please post step-by-step screenshots (with the pertinent Panels visible) to illustrate the process you wish to automate?

Report · Feb 10, 2016

Hi Chris,

Thanks for the reply. Please find the screen shot for the quick reference.

I have to transform (Professionate) the channel "Alpha 1" based(between) on the two guides.

Thanks in advance.

Report · Feb 11, 2016

I would think you can do what you want. if the alpha channel is a rectangle area as you show here. If the Alpha channel has a shape other than a rectangle that is squared up with the document canvas sides. Transforming the selection height would distort the selection shape. You will need to use the bounds of the alpha channel to get the alpha channels width and position

Here is a script I wrote to position and size and mask an image layer to four guides. The Mask I create would be the Alpha channel you want. You only have two guides you need four top, bottom, left and right. There is also a bug in photoshop scripting you may run in this area.

/* ==========================================================

// 2014 John J. McAssey (JJMack)

// ======================================================= */

// This script is supplied as is. It is provided as freeware.

// The author accepts no liability for any problems arising from its use.

/* Help Category note tag menu can be used to place script in automate menu

<category>JJMack's Script</category>

</javascriptresource>

*/

// enable double-clicking from Mac Finder or Windows Explorer

#target photoshop // this command only works in Photoshop CS2 and higher

// bring application forward for double-click events

app.bringToFront();

// ensure at least one document open

if (!documents.length) alert('There are no documents open.', 'No Document');

else {

// declare Global variables

//main(); // at least one document exists proceed

app.activeDocument.suspendHistory('Fix Image to Guides','main()'); //problem if there is a selection a layer resize Photoshop back up a history step ?

}

///////////////////////////////////////////////////////////////////////////////

// main function

///////////////////////////////////////////////////////////////////////////////

function main() {

// declare local variables

var orig_ruler_units = app.preferences.rulerUnits;

var orig_type_units = app.preferences.typeUnits;

var orig_display_dialogs = app.displayDialogs;

app.preferences.rulerUnits = Units.PIXELS; // Set the ruler units to PIXELS

app.preferences.typeUnits = TypeUnits.POINTS; // Set Type units to POINTS

app.displayDialogs = DialogModes.NO; // Set Dialogs off

try { code(); }

// display error message if something goes wrong

catch(e) { alert(e + ': on line ' + e.line, 'Script Error', true); }

app.displayDialogs = orig_display_dialogs; // Reset display dialogs

app.preferences.typeUnits = orig_type_units; // Reset ruler units to original settings

app.preferences.rulerUnits = orig_ruler_units; // Reset units to original settings

}

///////////////////////////////////////////////////////////////////////////////

// main function end

///////////////////////////////////////////////////////////////////////////////

///////////////////////////////////////////////////////////////////////////////////////////////

// The real code is embedded into this function so that at any point it can return

// to the main line function to let it restore users edit environment and end

//////////////////////////////////////////////////////////////////////////////////////////////

function code() {

if (app.activeDocument.guides.length != 4) { alert("Four and only four Guides are required"); return; } // quit

// get guides;

var theVert = new Array;

var theHor = new Array;

for (var m = 0; m < app.activeDocument.guides.length; m++) {

if (app.activeDocument.guides.direction == Direction.HORIZONTAL) {theVert.push(app.activeDocument.guides.coordinate)}

else {theHor.push(app.activeDocument.guides.coordinate)}

};

if (theHor.length != 2 || theVert.length != 2) { alert("Four Guides two vertical and two horizontal are required"); return; } // quit

getTarget=getSelectedLayersIdx();

if (getTarget.length!=1){ alert("The number of layers targeted is " + getTarget.length ); return; } // quit

if (app.activeDocument.activeLayer.isBackgroundLayer ) { alert("Can not resize the background layer"); return; } // quit

if (!app.activeDocument.activeLayer.visible ) { alert("Active layer is not visible"); return; } // quit

//if (hasLayerMask()) { alert("Active layer is Masked"); return; } // quit

if (app.activeDocument.activeLayer.kind == LayerKind.NORMAL || app.activeDocument.activeLayer.kind == LayerKind.SMARTOBJECT && hasLayerMask()) { deleteLayerMask ();}

if (app.activeDocument.activeLayer.kind != LayerKind.NORMAL && app.activeDocument.activeLayer.kind != LayerKind.SMARTOBJECT ) {

alert("Active layer is " + app.activeDocument.activeLayer.kind); return; } // quit

// set selection to the area defined but the guide lines the selection may get undone by the bug in .resize() backing up a step in histoty ???

app.activeDocument.selection.select([[theHor[0], theVert[0]], [theHor[1], theVert[0]], [theHor[1], theVert[1]], [theHor[0], theVert[1]]]);

// resize current normal layer or smart object layer to just cover selection canvas area aspect ratio and size and mask off any overflow

var SB = app.activeDocument.selection.bounds; // Get selection bounds

var SWidth = (SB[2].value) - (SB[0].value); // Area width

var SHeight = (SB[3].value) - (SB[1].value); // Area height

var LB = app.activeDocument.activeLayer.bounds; // Get Active layers bounds

var LWidth = (LB[2].value) - (LB[0].value); // Area width

var LHeight = (LB[3].value) - (LB[1].value); // Area height

var userResampleMethod = app.preferences.interpolation; // Save interpolation settings

app.preferences.interpolation = ResampleMethod.BICUBIC; // resample interpolation bicubic

app.activeDocument.selection.deselect(); // This deselect work around Adobe Bug in CS5, CS6, CC and CC 2014

// Since Adobe does not fix old releases of Photoshop this is a necessary work around for many releases of Photoshop

//alert("Before re-size history"); // Added to debug Adobe Resize Bug

try {

if (LWidth/LHeight<SWidth/SHeight) { // layer's Aspect Ratio less the Canvas area Aspect Ratio

var percentageChange = ((SWidth/LWidth)*100); // Resize to canvas area width

app.activeDocument.activeLayer.resize(percentageChange,percentageChange,AnchorPosition.MIDDLECENTER);

}

else {

var percentageChange = ((SHeight/LHeight)*100); // resize to canvas area height

app.activeDocument.activeLayer.resize(percentageChange,percentageChange,AnchorPosition.MIDDLECENTER);

}

catch(e) {

app.preferences.interpolation = userResampleMethod; // Reset interpolation setting

selectFront(); // Photoshop make top layer current when none are targeted

code(); // Retry with top visible layer selected targeted

return; // rest would have been done during the retry

}

//alert("After re-size history"); // Added to debug Adobe Resize Bug

app.preferences.interpolation = userResampleMethod; // Reset interpolation setting

// Seems to be a bug in resize() the document seems to first be backed up a step in history

app.activeDocument.selection.select([[theHor[0], theVert[0]], [theHor[1], theVert[0]], [theHor[1], theVert[1]], [theHor[0], theVert[1]]]); // redo the selection

align('AdCH'); // align to horizontal centers

align('AdCV'); // align to vertical centers

addLayermask(); // add layer mask to mask off excess

}

/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

// Helper Functions

/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

function align(method) {

var desc = new ActionDescriptor();

var ref = new ActionReference();

ref.putEnumerated( charIDToTypeID( "Lyr " ), charIDToTypeID( "Ordn" ), charIDToTypeID( "Trgt" ) );

desc.putReference( charIDToTypeID( "null" ), ref );

desc.putEnumerated( charIDToTypeID( "Usng" ), charIDToTypeID( "ADSt" ), charIDToTypeID( method ) );

try{executeAction( charIDToTypeID( "Algn" ), desc, DialogModes.NO );}

catch(e){}

}

///////////////////////////////////////////////////////////////////////////////

// Function: hasLayerMask

// Usage: see if there is a raster layer mask

// Input: <none> Must have an open document

// Return: true if there is a vector mask

///////////////////////////////////////////////////////////////////////////////

function hasLayerMask() {

var hasLayerMask = false;

try {

var ref = new ActionReference();

var keyUserMaskEnabled = app.charIDToTypeID( 'UsrM' );

ref.putProperty( app.charIDToTypeID( 'Prpr' ), keyUserMaskEnabled );

ref.putEnumerated( app.charIDToTypeID( 'Lyr ' ), app.charIDToTypeID( 'Ordn' ), app.charIDToTypeID( 'Trgt' ) );

var desc = executeActionGet( ref );

if ( desc.hasKey( keyUserMaskEnabled ) ) { hasLayerMask = true; }

}

catch(e) { hasLayerMask = false; }

return hasLayerMask;

}

function getSelectedLayersIdx(){

var selectedLayers = new Array;

var ref = new ActionReference();

ref.putEnumerated( charIDToTypeID("Dcmn"), charIDToTypeID("Ordn"), charIDToTypeID("Trgt") );

var desc = executeActionGet(ref);

if( desc.hasKey( stringIDToTypeID( 'targetLayers' ) ) ){

desc = desc.getList( stringIDToTypeID( 'targetLayers' ));

var c = desc.count

var selectedLayers = new Array();

for(var i=0;i<c;i++){

try{

activeDocument.backgroundLayer;

selectedLayers.push( desc.getReference( i ).getIndex() );

}catch(e){

selectedLayers.push( desc.getReference( i ).getIndex()+1 );

}

}else{

var ref = new ActionReference();

ref.putProperty( charIDToTypeID("Prpr") , charIDToTypeID( "ItmI" ));

ref.putEnumerated( charIDToTypeID("Lyr "), charIDToTypeID("Ordn"), charIDToTypeID("Trgt") );

try{

activeDocument.backgroundLayer;

selectedLayers.push( executeActionGet(ref).getInteger(charIDToTypeID( "ItmI" ))-1);

}catch(e){

selectedLayers.push( executeActionGet(ref).getInteger(charIDToTypeID( "ItmI" )));

}

return selectedLayers;

};

function selectFront() {

// Alt+. shortcut select ftont visible layer

var idslct = charIDToTypeID( "slct" );

var desc250 = new ActionDescriptor();

var idnull = charIDToTypeID( "null" );

var ref207 = new ActionReference();

var idLyr = charIDToTypeID( "Lyr " );

var idOrdn = charIDToTypeID( "Ordn" );

var idFrnt = charIDToTypeID( "Frnt" );

ref207.putEnumerated( idLyr, idOrdn, idFrnt );

desc250.putReference( idnull, ref207 );

var idMkVs = charIDToTypeID( "MkVs" );

desc250.putBoolean( idMkVs, false );

executeAction( idslct, desc250, DialogModes.NO );

}

function deleteLayerMask (apply) {

// Delet Layer mask default to not apply first

if (apply == undefined) {var apply = false};

try {

var idDlt = charIDToTypeID( "Dlt " );

var desc9 = new ActionDescriptor();

var idnull = charIDToTypeID( "null" );

var ref5 = new ActionReference();

var idChnl = charIDToTypeID( "Chnl" );

var idMsk = charIDToTypeID( "Msk " );

ref5.putEnumerated( idChnl, idChnl, idMsk );

desc9.putReference( idnull, ref5 );

var idAply = charIDToTypeID( "Aply" );

desc9.putBoolean( idAply, apply );

executeAction( idDlt, desc9, DialogModes.NO );

}

catch (e) {}

};

function addLayermask(){

// Add layer Mask

var idMk = charIDToTypeID( "Mk " );

var desc52 = new ActionDescriptor();

var idNw = charIDToTypeID( "Nw " );

var idChnl = charIDToTypeID( "Chnl" );

desc52.putClass( idNw, idChnl );

var idAt = charIDToTypeID( "At " );

var ref19 = new ActionReference();

var idChnl = charIDToTypeID( "Chnl" );

var idMsk = charIDToTypeID( "Msk " );

ref19.putEnumerated( idChnl, idChnl, idMsk );

desc52.putReference( idAt, ref19 );

var idUsng = charIDToTypeID( "Usng" );

var idUsrM = charIDToTypeID( "UsrM" );

var idRvlS = charIDToTypeID( "RvlS" );

desc52.putEnumerated( idUsng, idUsrM, idRvlS );

executeAction( idMk, desc52, DialogModes.NO );

// Un link layer mask just added fron the layers content

var idsetd = charIDToTypeID( "setd" );

var desc2 = new ActionDescriptor();

var idnull = charIDToTypeID( "null" );

var ref1 = new ActionReference();

var idLyr = charIDToTypeID( "Lyr " );

var idOrdn = charIDToTypeID( "Ordn" );

var idTrgt = charIDToTypeID( "Trgt" );

ref1.putEnumerated( idLyr, idOrdn, idTrgt );

desc2.putReference( idnull, ref1 );

var idT = charIDToTypeID( "T " );

var desc3 = new ActionDescriptor();

var idUsrs = charIDToTypeID( "Usrs" );

desc3.putBoolean( idUsrs, false );

var idLyr = charIDToTypeID( "Lyr " );

desc2.putObject( idT, idLyr, desc3 );

executeAction( idsetd, desc2, DialogModes.NO );

}

JJMack

Report · Feb 15, 2016

Hi JJMack,

Sorry for the late reply and Thanks for your valuable reply.

Actually I am looking for transform the active channel mask not a active layer.

Please help me out this problem.

Thanks in advance.

-yajiv

Report · Feb 15, 2016

The mask channel is a selection. For your resized mask you need the four side as I wrote. Top, Bottom, Left and Right. once you have that information you delete the layer mask. Make a selection Top Left, Top Right, Bottom Right, Bottom left. Then you Add Layer mask. Like the script I poster added the layer mask on the image layer it resized to fill the selection. Only you do not resize you just replace the layer mask.

JJMack

Report · Feb 15, 2016

Hi Chris,

Any update/suggestion on the above mentioned scripts?

-yajiv

Report · Feb 15, 2016

I am experiencing stress at work and do unfortunately not have time to look into this at current.

Report · Feb 15, 2016

I see no option to align alpha channels so storing them as Layer Masks as JJMack apparently did would seem a prudent work-around.

Another option would be to load it as a Selection to determine the bounds and then calculate the necessary offset from that – not sure if this would be quicker.

Report · Feb 21, 2016

Have you managed to achieve your goal yet?

What is the background anyway, why move a Channel?

Report · Feb 23, 2016

Thanks reply Chris,

Finally I get the solution and its working fine. Once again thanks for your follow up.

-yajiv

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