Export as how do you define exact pixel width for multiple scaled files

---

@Graemezee1 wrote:

the other output sizes  are  980px and  800px  I Am looking  to export images  a for web  based  media breaks 

---

Now that I know the other desired widths, I can update my previous Generator script. As the depth appears to be variable, I can't use a fixed px value for the height as in the v1 code sample that was using a square. The other point of difference is that the output files in this version use the docName variable rather than the lyrName variable.

/*
Generate Multiple Image Assets to Predefined Sizes and Formats.jsx
https://community.adobe.com/t5/photoshop-ecosystem-discussions/export-as-how-do-you-define-exact-pixel-width-for-multiple-scaled-files/td-p/12692037
Stephen Marsh, v1.2 - 25th February 2022
Note: Generator has always been buggy for me, sometimes it works once or twice, but then I need to restart Photoshop when it stops working...
*/

//#target photoshop

if (app.activeDocument.layers.length === 1) {
    // Activate Generator
    $.evalFile(File(app.path + '/Presets/Scripts/generate.jsx'));
    // Set the restore snapshot
    makeRestoreSnapshot();
    // Setup variables
    var origLayer = app.activeDocument.activeLayer;
    var lyrName = app.activeDocument.activeLayer.name;
    var origPath = app.activeDocument.path.fsName;
    var docName = app.activeDocument.name.replace(/\.[^\.]+$/, '');
    var assetDir = origPath + "/" + docName + "-assets";

    // Generate the image assets at various sizes and formats (PNG, JPG, GIF)...
    // https://helpx.adobe.com/photoshop/using/generate-assets-layers.html


    /******** Asset #1: Original 1920px wide as JPEG ********/
    app.activeDocument.activeLayer = origLayer;
    app.activeDocument.activeLayer.duplicate();
    var forwardLayer = (getActiveLayerIndex() + 1);
    selectLayerByIndex(forwardLayer);
    // .jpg90% is the default compression value if not explicitly specified
    app.activeDocument.activeLayer.name = "100% " + docName + "_1920px" + ".jpg";
    
    /******** Asset #2: 980px wide as JPEG ********/
    app.activeDocument.activeLayer = origLayer;
    app.activeDocument.activeLayer.duplicate();
    var forwardLayer = (getActiveLayerIndex() + 1);
    selectLayerByIndex(forwardLayer);
    // .jpg90% is the default compression value if not explicitly specified
    //app.activeDocument.activeLayer.name = "51.04% " + docName + "_980px" + ".jpg";
    app.activeDocument.activeLayer.name = "980x? " + docName + "_980px" + ".jpg";

    /******** Asset #3: 800px wide as JPEG ********/
    app.activeDocument.activeLayer = origLayer;
    app.activeDocument.activeLayer.duplicate();
    var forwardLayer = (getActiveLayerIndex() + 1);
    selectLayerByIndex(forwardLayer);
    // .jpg90% is the default compression value if not explicitly specified
    //app.activeDocument.activeLayer.name = "41.67% " + docName + "_800px" + ".jpg";
    app.activeDocument.activeLayer.name = "800x? " + docName + "_800px" + ".jpg";

    // End of script notification
    app.beep();
    alert("Note: a revert history snapshot has been created if you wish to return to the original layer state." + "\r" + "Image assets saved to:" + "\r\r" + assetDir);

} else {
    alert("Sorry, this script is only intended for single layer documents.");
}


/*********** Functions ***********/

function getActiveLayerIndex() {
    /* https://github.com/Paul-Riggott/PS-Scripts/blob/master/getLayersetLayerIDs.jsx */
    var ref = new ActionReference();
    ref.putEnumerated(charIDToTypeID('Lyr '), charIDToTypeID('Ordn'), charIDToTypeID('Trgt'));
    try {
        activeDocument.backgroundLayer;
        return executeActionGet(ref).getInteger(charIDToTypeID("ItmI")) - 1;
    } catch (e) {
        return executeActionGet(ref).getInteger(charIDToTypeID("ItmI"));
    }
}

/*
Select Forward layer by Index.jsx
v1.0 - Stephen Marsh, 1st September 2021
Select the forward layer, relative to the current selected layer, regardless of visibility
Note: Does not cycle through the top layer to the bottom layer, does not work with layer sets/groups
*/
function selectLayerByIndex(index) {
    /* https://github.com/ES-Collection/Photoshop-Scripts/blob/master/Remove%20Unused%20Layers.jsx */
    var ref = new ActionReference();
    ref.putIndex(charIDToTypeID("Lyr "), index);
    var desc = new ActionDescriptor();
    desc.putReference(charIDToTypeID("null"), ref);
    desc.putBoolean(charIDToTypeID("MkVs"), false);
    executeAction(charIDToTypeID("slct"), desc, DialogModes.NO);
}

function makeRestoreSnapshot() {
    var c2t = function (s) {
        return app.charIDToTypeID(s);
    };
    var s2t = function (s) {
        return app.stringIDToTypeID(s);
    };
    var descriptor = new ActionDescriptor();
    var reference = new ActionReference();
    var reference2 = new ActionReference();
    reference.putClass(s2t("snapshotClass"));
    descriptor.putReference(c2t("null"), reference);
    reference2.putProperty(c2t("HstS"), s2t("currentHistoryState"));
    descriptor.putReference(s2t("from"), reference2);
    descriptor.putString(s2t("name"), "Restore Previous State");
    descriptor.putEnumerated(s2t("using"), c2t("HstS"), s2t("fullDocument"));
    executeAction(s2t("make"), descriptor, DialogModes.NO);
}

/*
function selectRestoreSnapshot() {
    var s2t = function (s) {
        return app.stringIDToTypeID(s);
    };
    var descriptor = new ActionDescriptor();
    var reference = new ActionReference();
    reference.putName(s2t("snapshotClass"), "Restore Previous State");
    descriptor.putReference(s2t("null"), reference);
    executeAction(s2t("select"), descriptor, DialogModes.NO);
}
*/