Photoshop Script for auto save (diffuse and alpha) png textures for Cities Skylines

NQ - Cities Skylines - Save Texture.jsx

#target photoshop

////////////////////////////////////////////////
///                                          ///
/// P H O T O S H O P  S C R I P T           ///
/// ---------------------------------------- ///
/// PNG TEXTURE EXPORTS FOR CITIES SKYLINES  ///
///                                          ///
/// Date:    9/12/2015                       ///
/// Version: 1.1                             ///
///                                          ///
/// This script saves the all the kinds of   ///
/// texture maps with a (_x) suffix if the   ///
/// art made for that texture map is placed  ///
/// the corresponding group layer.           ///
///                                          ///
/// It corrects the document's mode to rgb   ///
/// 8 Bit and automaticly hides the          ///
/// "Template" layer on save. It ignores the ///
/// "Background". The script only affects    ///
/// root layers.                             ///
///                                          ///
/// You are free to use / change this script ///
/// But if you decide to redistribute please ///
/// mention my name as thanks for my effort. ///
///                                          ///
/// Update log:                              ///
///   v1.0: Support for diffuse and alpha    ///
///   v1.1: Added support for all maps       ///
///                                          ///
///                                          ///
/// Created by Nique de Graaff               ///
///                                          ///
///                                          ///
///                  niquedegraaff@gmail.com ///
///                                          ///
////////////////////////////////////////////////

// Initialize
var doc = app.activeDocument;
var docName = doc.name.replace(/\.[^\.]+$/, '');
var docExt = decodeURI(doc.name).replace(/^.*\./, '');
var docPath = "";

// Run the script
main();

function main()
{
  // Check if the document exists
  if (docExt.toLowerCase() != 'psd') return;
  docPath = doc.path;

  // Check if document is in RGB mode, if not update
  if (doc.mode != DocumentMode.RGB)
  {
    doc.changeMode(ChangeMode.RGB);
  }

  // Check if document is in 8 bit mode, if not update
  if (doc.bitsPerChannel != BitsPerChannelType.EIGHT)
  {    
    doc.bitsPerChannel = BitsPerChannelType.EIGHT;
  }

  // Make a list of all affected (root) layers
  var affectedLayers = {};
  for (i = 0; i < doc.layers.length; i++)
  {
    if (doc.layers[i].parent == doc)
      affectedLayers[doc.layers[i].name] = doc.layers[i].visible;
  }

  // Save the diffuse texture
  saveTexture('Diffuse');

  // Save the alpha texture
  saveTexture('Alpha');
  
  // Save the color map texture
  saveTexture('Color');
  
  // Save the illumination texture
  saveTexture('Illumination');
  
  // Save the normal texture
  saveTexture('Normal');
  
  // Save the specular texture
  saveTexture('Specular');
  

  // Reset all layers as it was
  for (var key in affectedLayers)
  {
    if(affectedLayers.hasOwnProperty(key))
    {
      doc.layers.getByName(key).visible = affectedLayers[key];
    }  
  }
}

// Save Texture
function saveTexture(name)
{
  for(i = 0; i < doc.layers.length; i++)
  {
    var currentLayer = doc.layers[i];
    var save = false;
    var ext = "";
    
    if (currentLayer.name == name && currentLayer.parent == doc && currentLayer.name != 'Background')
    {
      currentLayer.visible = true;
      save = true;        
      ext = "_" + currentLayer.name.charAt(0).toLowerCase();
    } else {
      currentLayer.visible = false;
      save = false;
    }
    
    if (save == true)
    {
      var file = File(docPath + "/" + docName + ext);
      if (file.exists) file.remove();
      SavePNG(file);
    }
  }
}

// Saves the (texure) file to disk
function SavePNG(file)
{
  pngSaveOptions = new PNGSaveOptions();
  pngSaveOptions.compression = 0;
  pngSaveOptions.interlaced = false;
  activeDocument.saveAs(file, pngSaveOptions, true, Extension.LOWERCASE);
}

Install the script in Photoshop by adding it to the 'Save File' event in the Event Manager (under File -> Script). Disable when you do other work. Enable when you're texturing your models.