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L
Lorin Lochridge
Participant
January 21, 2016
Answered

How to convert image to CMYK (from any format)?

  • January 21, 2016
  • 1 reply
  • 1905 views

This seems like it should be pretty simple.

I tried to reverse engineer a function from the "Warn if RGB.jsx" found: applications/Adobe Photoshop CC 2015/ Presets/Scripts/Warn if RGB.jsx

in this file the image that is open in Photoshop is taken and converted to RGB.

Well that's exactly what I want to do, except the reverse.

How do I write code that would take my "current image" and change it to CMYK just as if I were to go into photoshop (GUI) Edit> Convert to Profile... > and select the CMYK bullet option under "Destination Space"

I need this in a function for other script I have.

I will past what I have (with my poor attempt at reverse engineering the "Warn if RGB.jsx" function in place.

Thank you. I could really use the help and I think this should be pretty straight forward.

try {


  var data = GetDataFromDocument( activeDocument );


  if ('eps' == data.extension.toLowerCase()) {


  //convert to cmyk


  Switch();


  }


  else{


  //run code to square up images


  toSquare();


  }


}


catch( e ) {


  alert(e);


}














//FUNCTIONS


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


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






function toSquare(){


  var savedRuler= app.preferences.rulerUnits;


  app.preferences.rulerUnits = Units.PIXELS;


  var w = app.activeDocument.width;


  var h = app.activeDocument.height;


  if(w>h) app.activeDocument.resizeCanvas (w, w, AnchorPosition.MIDDLECENTER);


  if(w<h) app.activeDocument.resizeCanvas (h, h, AnchorPosition.MIDDLECENTER);


  //if w==h already square


  app.preferences.rulerUnits = savedRuler;


}






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






function GetDataFromDocument( inDocument ) {


  var data = new Object();


  var fullPathStr = inDocument.fullName.toString();


  var lastDot = fullPathStr.lastIndexOf( "." );


  var fileNameNoPath = fullPathStr.substr( 0, lastDot );


  data.extension = fullPathStr.substr( lastDot + 1, fullPathStr.length );


  var lastSlash = fullPathStr.lastIndexOf( "/" );


  data.fileName = fileNameNoPath.substr( lastSlash + 1, fileNameNoPath.length );


  data.folder = fileNameNoPath.substr( 0, lastSlash );


  data.fileType = inDocument.fullName.type;


  return data;


}






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






function Switch() {


  var eventModeChange = stringIDToTypeID( "8cba8cd6-cb66-11d1-bc43-0060b0a13dc4" );


  var descSource = new ActionDescriptor();


  var keySourceMode = charIDToTypeID( "SrcM" );


  var list = new ActionList();


  var keyCondition = charIDToTypeID( "Cndn" );


  var keyBitmap = charIDToTypeID( "UBtm" );


  var keyGrayscale = charIDToTypeID( "UGry" );


  var keyDuotone = charIDToTypeID( "UDtn" );


  var keyIndex = charIDToTypeID( "UInd" );


  var keyRGB = charIDToTypeID( "URGB" );


  var keyCMYK = charIDToTypeID( "UCMY" );


  var keyLab = charIDToTypeID( "ULab" );


  var keyMultichannel = charIDToTypeID( "UMlt" );


  list.putEnumerated( keyCondition, keyBitmap );


  list.putEnumerated( keyCondition, keyGrayscale );


  list.putEnumerated( keyCondition, keyDuotone );


  list.putEnumerated( keyCondition, keyIndex );


  list.putEnumerated( keyCondition, keyRGB );


  list.putEnumerated( keyCondition, keyCMYK );


  list.putEnumerated( keyCondition, keyLab );


  list.putEnumerated( keyCondition, keyMultichannel );


  descSource.putList( keySourceMode, list );


  var keyDestination = charIDToTypeID( "DstM" );


  var descDest = new ActionDescriptor();


  var keyCMYK = charIDToTypeID( "UCMY" );


  descSource.putObject( keyDestination, keyRGB, descDest );


  executeAction( eventModeChange, descSource, DialogModes.NO );


}






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


//////////////////////////////////////////////
This topic has been closed for replies.
Correct answer oliverIntergrafika

Seems like the forum engine swallowing random whitespaces when we switch to advanced editor mode:

The exact line is this:

var idT = charIDToTypeID( "T   " );

There are 3 spaces after the T.

1 reply

oliverIntergrafika
oliverIntergrafika
Inspiring
January 21, 2016
function converToCMYK( rasterize )


{


    var idCnvM = charIDToTypeID( "CnvM" );


    var desc39 = new ActionDescriptor();


    var idT = charIDToTypeID( "T  " );


    var idCMYM = charIDToTypeID( "CMYM" );


    desc39.putClass( idT, idCMYM );


    var idMrge = charIDToTypeID( "Mrge" );


    desc39.putBoolean( idMrge, false );


    var idRstr = charIDToTypeID( "Rstr" );


    desc39.putBoolean( idRstr, rasterize );


    executeAction( idCnvM, desc39, DialogModes.NO );


}




converToCMYK ( rasterize = true ) ;

This code is copied from ScriptingListenerJS.log which is the output of the ScriptListener.8li plugin.

    L
    Lorin LochridgeAuthor
    Participant
    January 22, 2016

    When I try this code, the resulting error is:

    oliverIntergrafika
    oliverIntergrafikaCorrect answer
    Inspiring
    January 22, 2016

    Seems like the forum engine swallowing random whitespaces when we switch to advanced editor mode:

    The exact line is this:

    var idT = charIDToTypeID( "T   " );

    There are 3 spaces after the T.

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