Using JavaScript, cannot export png24 with 300 ppi

Report · Dec 14, 2021

I have a document that I can export manually with 300ppi resolution, just like it's set in Effect -> Document Raster Effects Settings...

But when I use script, it always seems to default to 72ppi. I tried every other file format and it always sets to 72. Tried using JPEG quality parameter = 100, still resolves to 72ppi.

my document size is 600x600 pt, one artboard, the artboard corners are set at integer values, either at 0 pt or 600 pt.

Any help would be appreciated!
Here's my code snippet below:

function exportFileToPNG(){

if (app. documents. length > 0) {

var exportOptions = new ExportOptionsPNG24() ;

exportOptions.artBoardClipping = true;

var type = ExportType. PNG24;

var file = new File(filePath);

app.activeDocument.exportFile(file, type, exportOptions);

}
}

Report · Dec 14, 2021

There is no function to set PPI in the scripting reference for either JPEG or PNG exports. See here for a possible workaround:

https://community.adobe.com/t5/illustrator-discussions/setting-the-resolution-output-in-an-export-pn...

Incidentally, Effect > Document Raster Effect Settings doesn't set PPI for export either, it only sets it for raster effects such as drop shadow within Illustrator.

Report · Dec 14, 2021

Thanks, Doug! I'll try it later today.

Report · Dec 14, 2021

That worked like a charm! Thanks for pointing to the right answer, Doug!

Report · Dec 14, 2021

i was wondering why to use script to export 1 artboard in a file!

easy to do

file> export to

Report · Dec 14, 2021

I wouldn't make any assumptions about why a user would want to use a script to export. It might be a snippet of a larger workflow.

Report · Dec 14, 2021

Manal, just like Doug pointed out, it's a snippet of a workflow that generates thousands of images

Report · Dec 14, 2021

See https://community.adobe.com/t5/illustrator-discussions/script-to-save-as-png/m-p/11096474#M175209

Report · Dec 14, 2021

You can have your script create, load, execute then unload an Action that exports beyond 72:

/**
 * Thanks Ten-A! 
 * https://community.adobe.com/t5/illustrator/illustrator-jpegexportoptions-object-properties-are-missing-in-object-model/td-p/8699364?page=1
 *
 *  {String} pth - Filepath for document destination
 */
function exportJPG(pth) {
  //Exports 300ppi CMYK jpg
  var str = "";
  for (var i = 0; i < pth.length; i++) str += u16to8(pth.charCodeAt(i));
  var act =
    "/version 3" +
    "/name [ 4" +
    "	73657431" +
    "]" +
    "/isOpen 1" +
    "/actionCount 1" +
    "/action-1 {" +
    "	/name [ 4" +
    "		61637432" +
    "	]" +
    "	/keyIndex 0" +
    "	/colorIndex 0" +
    "	/isOpen 1" +
    "	/eventCount 1" +
    "	/event-1 {" +
    "		/useRulersIn1stQuadrant 0" +
    "		/internalName (adobe_exportDocument)" +
    "		/localizedName [ 9" +
    "			4578706f7274204173" +
    "		]" +
    "		/isOpen 1" +
    "		/isOn 1" +
    "		/hasDialog 1" +
    "		/showDialog 0" +
    "		/parameterCount 7" +
    "		/parameter-1 {" +
    "			/key 1885434477" +
    "			/showInPalette 0" +
    "			/type (raw)" +
    "			/value < 104" +
    "				0a00000001000000030000000100000000002c01020000000000000001000000" +
    "				69006d006100670065006d006100700000006800720069007300200054007500" +
    "				73006b006f00770073006b00690020002d00200041006e006e00610020004300" +
    "				0000000001000000" +
    "			>" +
    "			/size 104" +
    "		}" +
    "/parameter-2 {/key 1851878757/showInPalette 4294967295" +
    "/type (ustring)/value [ " +
    str.length / 2 +
    " " +
    str +
    "]}" +
    "		/parameter-3 {" +
    "			/key 1718775156" +
    "			/showInPalette -1" +
    "			/type (ustring)" +
    "			/value [ 16" +
    "				4a5045472066696c6520666f726d6174" +
    "			]" +
    "		}" +
    "		/parameter-4 {" +
    "			/key 1702392942" +
    "			/showInPalette -1" +
    "			/type (ustring)" +
    "			/value [ 12" +
    "				6a70672c6a70652c6a706567" +
    "			]" +
    "		}" +
    "		/parameter-5 {" +
    "			/key 1936548194" +
    "			/showInPalette -1" +
    "			/type (boolean)" +
    "			/value 1" +
    "		}" +
    "		/parameter-6 {" +
    "			/key 1935764588" +
    "			/showInPalette -1" +
    "			/type (boolean)" +
    "			/value 1" +
    "		}" +
    "		/parameter-7 {" +
    "			/key 1936875886" +
    "			/showInPalette -1" +
    "			/type (ustring)" +
    "			/value [ 3" +
    "				312d36" +
    "			]" +
    "		}" +
    "	}" +
    "}" +
    "";
  var tmp = File(Folder.desktop + "/set10.aia");
  tmp.open("w");
  tmp.write(act);
  tmp.close();
  app.loadAction(tmp);
  app.doScript("act2", "set1", false);
  app.unloadAction("set1", "");
  tmp.remove();
}
function u16to8(cd) {
  var out =
    cd < 0x80
      ? toHex2(cd)
      : (cd < 0x800
          ? toHex2(((cd >> 6) & 0x1f) | 0xc0)
          : toHex2((cd >> 12) | 0xe0) + toHex2(((cd >> 6) & 0x3f) | 0x80)) +
        toHex2((cd & 0x3f) | 0x80);
  return out;
}
function toHex2(num) {
  var out = "0" + num.toString(16);
  return out.slice(-2);
}

ImageCapture is easier but this is another alternative, I've had clients who specifically use Actions to export and using the same Actions as they do ensures the results are identical especially with CMYK or particular settings.

Report · Dec 14, 2021

For PNG24, if you record an Action (destination path doesn't matter) to export to your specs, then export this .aia Action file you can retrofit it into the code above. The concatenation is a bit obnoxious above ha, but essentially you'd swap the above Action text with your own. You'd still need to include the manual section that designates the filepath, which in the above Action is this section:

    "/parameter-2 {/key 1851878757/showInPalette 4294967295" +
    "/type (ustring)/value [ " +
    str.length / 2 +
    " " +
    str +
    "]}" +

There should be a corresponding parameter-2 looking very similar in yours, you'd have to copy/paste the sections following "/type" and below to replace it.

Also! You'd need to accurately have your Action Name and Action Set parameters set in the above snippet within the app.doScript and app.unloadAction methods.

Report · Dec 14, 2021

another alternative for future reference, Export for Screens supports custom Resolution exports and it's available in the Scripting API

Report · Dec 14, 2021

Oh thanks Carlos! I didn't know that we had access to Export for Screens. That'll be useful. 🙂

I found your helpful post that shows the Export For Screens info, but do you know of any updated online docs for scripting Illustrator? I use https://ai-scripting.docsforadobe.dev but it doesn't include the latest additions to the API.

- Mark