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multiDensityExportForAndroid.jsx

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/*
* multiDensityExportForAndroid.jsx
* 
* Copyright (c) 2014. RoundRect Co.,Pte.
* Author: Elex
* http://www.roundrect.kr/desktop/multi-density-export/
* 
* licensed under a Creative Commons BY-NC-SA
* http://creativecommons.org/licenses/by-nc-sa/4.0/
*
* This script file is to export resized files for multiple densities in a single process
* from Adobe Photoshop and/or Illustrator mainly for Android application development.
* It's been tested with both Adobe Photoshop CS 6 and Adobe Illustrator CS 6.
* 
* 
* Before running this script, users must edit the variable 'WORK_FOLDER' 
* to their preferred working folder name first. And also, users have to 
* make child folders such as 'drawable-mdpi', 'drawable-hdpi', etc. 
* under the work folder.
* If you're not running this script on Windows OS, 
* please check the file path separator too.
* 
* The script can be run by
* [In Photoshop] File > Scripts > Browse...
* [In Illustrator] File > Scripts > Other script
* Or, you can google for some documents about 
* adding a script as a menu item on Photoshop/Illustrator.
*
* The active layer's name is used as an output file name, 
* so please check the layer is activated and its name is properly set.
* 
* When prompted to ask you an output size, 
* type a width of a mdpi image in pixel.
* 
* If it's useful to you, please donate and support further developments.
* https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=LXC8U85PSUZL8
*
*/

// app's name
var PHOTOSHOP = "Adobe Photoshop";
var ILLUSTRATOR = "Adobe Illustrator";

// users can comment a line for an unwanted density.
var DENSITIES = [
	{"name":"LDPI", "scaleFactor":0.75, "folder":"drawable-ldpi"},
	{"name":"MDPI", "scaleFactor":1.0, "folder":"drawable-mdpi"},
	{"name":"HDPI", "scaleFactor":1.5, "folder":"drawable-hdpi"},
	{"name":"XHDPI", "scaleFactor":2.0, "folder":"drawable-xhdpi"},
	{"name":"XXHDPI", "scaleFactor":3.0, "folder":"drawable-xxhdpi"},
	{"name":"XXXHDPI", "scaleFactor":4.0, "folder":"drawable-xxxhdpi"}
];

// users have to edit this to match with their OS
var PATH_SEPARATOR = "\\";

// users must edit following line to their work folder path. 
// this should be ended with a path separator.
var WORK_FOLDER = "D:\\work\\res\\";
// if you prefer to use a folder picker dialog, uncomment following line.
// WORK_FOLDER = pickWorkFolder();
mkdir(WORK_FOLDER);

var targetWidth = prompt( 'Output pixel width for mdpi', 48 );

// this is the main loop,
// (@2014-4-21) a folder will be created if it does not exist
for (var i=0; i<DENSITIES.length; i++) {
	var scale = targetWidth * DENSITIES[i].scaleFactor / getDocumentWidth();
	var folder = WORK_FOLDER + DENSITIES[i].folder + PATH_SEPARATOR;
	mkdir(folder);
	exportFileAsPNG24(folder + getActiveLayerName(), scale);
}

// this function is the core part of this script, 
// users can edit some output options to their preference
function exportFileAsPNG24 (outFileName, scale) {
	if (app.name == PHOTOSHOP) {
		var exportOptions = new ExportOptionsSaveForWeb();
		var type = ExportType.SAVEFORWEB;
		var outFile = new File(outFileName + ".png");
		exportOptions.format = SaveDocumentType.PNG;
		exportOptions.PNG8 = false;
		exportOptions.transparency = true;
		exportOptions.includeProfile = false;
		exportOptions.interlaced = false;
		
		var copyDoc = app.activeDocument.duplicate();
		var width = copyDoc.width.as("px") * scale;
		var height = copyDoc.height.as("px") * scale;
		copyDoc.resizeImage(width, height, copyDoc.resolution, ResampleMethod.BICUBIC);
		
		copyDoc.exportDocument(outFile, type, exportOptions);
		copyDoc.close(SaveOptions.DONOTSAVECHANGES);
		
	} else if (app.name == ILLUSTRATOR) {
		var exportOptions = new ExportOptionsPNG24();
		var type = ExportType.PNG24;
		var outFile = new File(outFileName);
		exportOptions.antiAliasing = true;
		exportOptions.artBoardClipping = true;
		exportOptions.transparency = true;
		exportOptions.saveAsHTML = false;	
		exportOptions.matte = false;
		exportOptions.horizontalScale = scale * 100;
		exportOptions.verticalScale = scale * 100;
		app.activeDocument.exportFile( outFile, type, exportOptions );	
		
	}
	
}

// name of current layer
function getActiveLayerName(){
	return app.activeDocument.activeLayer.name;	
}

// document size(width) of current document
function getDocumentWidth() {
	if (app.name == PHOTOSHOP) {
		return app.activeDocument.width.as("px");
	} else if (app.name == ILLUSTRATOR) {
		return app.activeDocument.width;
	}
}

// folder chooser dialog
function pickWorkFolder() {
	if (app.name == PHOTOSHOP) {
		var folder = new Folder(app.activeDocument.path);
		return folder.selectDlg( 'Pick a folder for output', app.activeDocument.path );
	} else if (app.name == ILLUSTRATOR) {
		return Folder.selectDialog( 'Pick a folder for output', app.activeDocument.path );
	}
}

// create a folder if exists not 
// (@2014-4-21)
function mkdir(folder){
	var dir = new Folder(folder);
	if (!dir.exists) {		
		dir.create();
	}
}

// End of file