This script is an extension of the previous script, it will save all selected top level layer's raster masks to PNG for both selected layers and layer sets.
It has the same limitations/conditions as the Active Layer Mask to PNG.jsx script above.
/*
Selected Layers Masks to PNG.jsx
https://community.adobe.com/t5/photoshop-ecosystem-discussions/trouble-with-photoshop-layer-masks/td-p/12698065
Stephen Marsh, 23rd January 2022 - v1.0
Note:
The script is simple - the saved PNG is grayscale mode and is not colour
managed. There is no error checking to ensure that there is an active
layer. If no layer is selected, the uppermost layer will be used (this
may not be expected). PNG files are saved to the active document path,
unsaved documents will have the PNG file saved to the desktop.
*/
#target photoshop
// Optionally select all layers, uncomment if reqiured
// app.runMenuItem(stringIDToTypeID('selectAllLayers'));
/***** Process Selected Layers from Jazz-y *****/
var s2t = stringIDToTypeID;
(r = new ActionReference).putProperty(s2t('property'), p = s2t('targetLayersIDs'));
r.putEnumerated(s2t('document'), s2t('ordinal'), s2t('targetEnum'));
var lrs = executeActionGet(r).getList(p),
sel = new ActionReference();
for (var i = 0; i < lrs.count; i++) {
sel.putIdentifier(s2t('layer'), p = lrs.getReference(i).getIdentifier(s2t('layerID')));
(r = new ActionReference).putIdentifier(s2t('layer'), p);
(d = new ActionDescriptor()).putReference(s2t("target"), r);
executeAction(s2t('select'), d, DialogModes.NO);
/***** Process Selected Layers from Jazz-y *****/
if (app.documents.length > 0) {
// Raster mask, vector mask not currently supported
if (hasLayerMask() === true) {
try {
// Use the previously saved path
//var docPath = decodeURI(app.activeDocument.path);
var docPath = app.activeDocument.path.fsName;
} catch (e) {
// If unsaved, select the desktop
var docPath = "~/Desktop";
}
// FileName + LayerName + Mask
var maskDocName = app.activeDocument.name.replace(/\.[^\.]+$/, '') + " - " + app.activeDocument.activeLayer.name + " Mask";
// Select active layer mask channel
selectLayerMask(false);
// Dupe active channel to new doc
dupeChannel(maskDocName, "currentChannelName");
// Convert from multichannel mode to something supported by PNG
app.activeDocument.changeMode(ChangeMode.GRAYSCALE);
// Save as PNG options
var pngFile = new File(docPath + "/" + maskDocName + ".png");
if (pngFile.exists) {
// true = 'No' as default active button
if (!confirm('File "' + maskDocName + ".png" + '" exists, overwrite: Yes or No?', true))
//throw null;
throw app.activeDocument.close(SaveOptions.DONOTSAVECHANGES);
}
var pngOptions = new PNGSaveOptions();
pngOptions.compression = 0;
pngOptions.interlaced = false;
app.activeDocument.saveAs(pngFile, pngOptions, true, Extension.LOWERCASE);
app.activeDocument.close(SaveOptions.DONOTSAVECHANGES);
}
} else {
alert("You must have a document open!");
}
}
// End of script notification
app.beep();
alert("Selected layer masks saved to PNG at the following path:" + "\r" + docPath);
// Functions
function selectLayerMask(makeVisible) {
var s2t = function (s) {
return app.stringIDToTypeID(s);
}
var descriptor = new ActionDescriptor();
var reference = new ActionReference();
reference.putEnumerated(s2t("channel"), s2t("channel"), s2t("mask"));
descriptor.putReference(s2t("null"), reference);
descriptor.putBoolean(s2t("makeVisible"), makeVisible);
executeAction(s2t("select"), descriptor, DialogModes.NO);
}
function dupeChannel(name2, channelName) {
var s2t = function (s) {
return app.stringIDToTypeID(s);
}
var descriptor = new ActionDescriptor();
var descriptor2 = new ActionDescriptor();
var reference = new ActionReference();
descriptor2.putString(s2t("name"), name2);
descriptor.putObject(s2t("new"), s2t("document"), descriptor2);
reference.putEnumerated(s2t("channel"), s2t("ordinal"), s2t("targetEnum"));
descriptor.putReference(s2t("using"), reference);
descriptor.putString(s2t("channelName"), channelName);
executeAction(s2t("make"), descriptor, DialogModes.NO);
}
function hasLayerMask() {
// From Adobe's Flatten All Masks.jsx
var hasLayerMask = false;
try {
var ref = new ActionReference();
var keyUserMaskEnabled = app.charIDToTypeID('UsrM');
ref.putProperty(app.charIDToTypeID('Prpr'), keyUserMaskEnabled);
ref.putEnumerated(app.charIDToTypeID('Lyr '), app.charIDToTypeID('Ordn'), app.charIDToTypeID('Trgt'));
var desc = executeActionGet(ref);
if (desc.hasKey(keyUserMaskEnabled)) {
hasLayerMask = true;
}
} catch (e) {
hasLayerMask = false;
}
return hasLayerMask;
}
https://prepression.blogspot.com/2017/11/downloading-and-installing-adobe-scripts.html
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