Scripting Photoshop with ExtendScript

2011-11-25-01.jsx

// bring Photoshop into focus
// This also allows you to simply double click the JSX file
#target photoshop

// set some default variables
var docRef = app.activeDocument;

// remember this is JavaScript. That means I can take
// input from a user in the form of a prompt. Awesome right?
var fileName = prompt('Please enter base file name', docRef.name);
var basePath = '/Users/andymatthews/Desktop/goba/Application Design /Final/';

// set options for saving document
var webOptions = new ExportOptionsSaveForWeb();
webOptions.format = SaveDocumentType.PNG;
webOptions.PNG8 = false; 
webOptions.transparency = true;
webOptions.interlaced = 0;
webOptions.includeProfile = false;
webOptions.optimized = true;

// take a snapshot to use for reverting
var savedState = docRef.activeHistoryState;

// save 2.0 image
docRef.exportDocument(getFileName('high'), ExportType.SAVEFORWEB,webOptions);

// resize to 75%
docRef.resizeImage('75%','75%');
        
// save 1.5 image
docRef.exportDocument(getFileName('med'), ExportType.SAVEFORWEB,webOptions);

// revert back to pre-resized state
docRef.activeHistoryState = savedState;

// resize to 50%
docRef.resizeImage('50%','50%');
        
// save 1.0 image
docRef.exportDocument(getFileName('low'), ExportType.SAVEFORWEB,webOptions);

// revert back to pre-resized state
docRef.activeHistoryState = savedState;

function getFileName(size) {
   // accepts high, med, low
   var sizes = {
       'high': ['2.0/','@2x.png'],
       'med': ['1.5/','.png'],
       'low': ['1.0/','.png']
   };
   return new File(basePath + sizes[size][0] + fileName + sizes[size][1]);
}