iOS App Icon Generator

iOS_AppIcon_Generator.jsx

// Photoshop Script to Create iPhone App Icons from iTunesArtwork/1024px size image
//
// In the Event of name collisions this script will overwrite files in the export folder.
//
// MIT License
//
// Copyright (c) 2016 Dylan Conway
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.


// Turn debugger on. 0 is off.
// $.level = 1;

try
{
  // Prompt user to select iTunesArtwork file. Clicking "Cancel" returns null.
  var iTunesArtwork = File.openDialog("Select a sqaure PNG file that is at least 1024x1024.", "*.png", false);

  if (iTunesArtwork !== null) 
  { 
    var doc = open(iTunesArtwork, OpenDocumentType.PNG);
    
    if (doc == null)
    {
      throw "Something is wrong with the file.  Make sure it's a valid PNG file.";
    }

    var requiredSize = 512

    var startState = doc.activeHistoryState;       // save for undo
    var initialPrefs = app.preferences.rulerUnits; // will restore at end
    app.preferences.rulerUnits = Units.PIXELS;     // use pixels

    if (doc.width != doc.height)
    {
        throw "Image is not square";
    }
    else if ((doc.width < requiredSize) && (doc.height < requiredSize))
    {
        throw "Image is too small!  Image must be at least 1024x1024 pixels.";
    }
    else if (doc.width < requiredSize)
    {
        throw "Image width is too small!  Image width must be at least 1024 pixels.";
    }
    else if (doc.height < requiredSize)
    {
        throw "Image height is too small!  Image height must be at least 1024 pixels.";
    }
    
    // Folder selection dialog
    var destFolder = Folder.selectDialog( "Choose an output folder");

    if (destFolder == null)
    {
      // User canceled, just exit
      throw "";
    }

    // Save icons in PNG using Save for Web.
    var sfw = new ExportOptionsSaveForWeb();
    sfw.format = SaveDocumentType.PNG;
    sfw.PNG8 = false; // use PNG-24
    sfw.transparency = true;
    doc.info = null;  // delete metadata
    
    var icons = [
      {"name": "AppIcon20x20@2x",       "size":40},
      {"name": "AppIcon20x20@3x",       "size":60},
      //{"name": "AppIcon29",           "size":29},
      {"name": "AppIcon29x29@2x",       "size":58},
      {"name": "AppIcon29x29@3x",       "size":87},
      {"name": "AppIcon40x40@2x",       "size":80},
      {"name": "AppIcon40x40@3x",       "size":120},
      //{"name": "AppIcon57x57",        "size":57},
      //{"name": "AppIcon57x57@2x",     "size":114},
      {"name": "AppIcon60x60@2x",       "size":120},
      {"name": "AppIcon60x60@3x",       "size":180},
      //{"name": "Icon-40",             "size":40},
      //{"name": "Icon-76",             "size":76},
      //{"name": "Icon-76@2x",          "size":152},
      //{"name": "Icon-120",            "size":120},
      //{"name": "iTunesArtwork",       "size":512},
      {"name": "AppIcon1024x1024",      "size":1024}
      //{"name": "Icon",                "size":57},
      //{"name": "Icon@2x",             "size":114},
      //{"name": "Icon-72",             "size":72},
      //{"name": "Icon-72@2x",          "size":144},
      //{"name": "Icon-Small-50",       "size":50},
      //{"name": "Icon-Small-50@2x",    "size":100}
    ];

    var icon;
    for (i = 0; i < icons.length; i++) 
    {
      icon = icons[i];
      doc.resizeImage(icon.size, icon.size, // width, height
                      null, ResampleMethod.BICUBICSHARPER);

      var destFileName = icon.name + ".png";

      if ((icon.name == "iTunesArtwork@2x") || (icon.name == "iTunesArtwork"))
      {
        // iTunesArtwork files don't have an extension
        destFileName = icon.name;
      }

      doc.exportDocument(new File(destFolder + "/" + destFileName), ExportType.SAVEFORWEB, sfw);
      doc.activeHistoryState = startState; // undo resize
    }

    alert("iOS Icons created!");
  }
}
catch (exception)
{
  // Show degbug message and then quit
	if ((exception != null) && (exception != ""))
    alert(exception);
 }
finally
{
    if (doc != null)
        doc.close(SaveOptions.DONOTSAVECHANGES);
  
    app.preferences.rulerUnits = initialPrefs; // restore prefs
}