Reading Hex Codes on each layer of a Photoshop Document?

[Zee333]

I have this script (modified a bit) from @jazz-y  that allows me to read all the hex codes in a document into an array which is great. I was wondering if there was a way to push the hexes into their own arrays based off the layers?

const DE_CIE76 = 0; //color difference: 0-255
const THRESHOLD = 0; //color pixels threshold

var s2t = stringIDToTypeID,
    t2s = typeIDToStringID,
    colorsObj = {},
    colorsArr = [];
(r = new ActionReference()).putProperty(s2t('property'), p = s2t('mode'));
r.putEnumerated(s2t('document'), s2t('ordinal'), s2t('targetEnum'));
if (t2s(executeActionGet(r).getEnumerationValue(p)) == 'RGBColor') {
    var f = new File(Folder.temp + '/colors.raw');
    (d = new ActionDescriptor()).putBoolean(s2t("channelsInterleaved"), true);
    d.putBoolean(s2t('copy'), true);
    (d1 = new ActionDescriptor()).putObject(s2t("as"), s2t("rawFormat"), d);
    d1.putPath(s2t("in"), f);
    executeAction(s2t("save"), d1, DialogModes.NO);
    f.open('r');
    f.encoding = "BINARY";
    doForcedProgress('Reading colors', 'readColors(f.read(), colorsObj)');
    f.close();
    f.remove();
    for (var a in colorsObj) if (colorsObj[a] > THRESHOLD) colorsArr.push({hex: a });
    if (DE_CIE76) doForcedProgress('Filtering colors by dE = ' + DE_CIE76, 'filterByDE(colorsArr)');
}
        
function readColors(s, colorsObj) {
    for (var i = 0; i < s.length; i += 3) {
        var cur = toHex(s, i, 3)
        updateProgress(i, s.length)
        if (colorsObj[cur]) colorsObj[cur]++; else colorsObj[cur] = 1;
    }
}
function filterByDE(c) {
    for (var i = 0; i < c.length; i++) {
        updateProgress(i, c.length)
        if (c[i] == null) continue;
        var cA = new SolidColor;
        cA.rgb.hexValue = c[i].hex;
        for (var x = i + 1; x < c.length; x++) {
            if (c[x] == null || c[i] == null) continue;
            var cB = new SolidColor;
            cB.rgb.hexValue = c[x].hex;
            if (deltaE(cA, cB) <= 10) {
                if (c[i].pixels > c[x].pixels) {
                    c[i].pixels += c[x].pixels
                    c[x] = null
                } else {
                    c[x].pixels += c[i].pixels
                    c[i] = null
                }
            }
        }
    }
}
function toHex(s, from, bits) {
    var h = '';
    for (var i = from; i < from + bits; i++) h += (('0' + s.charCodeAt(i).toString(16)).slice(-2));
    return h
}
function deltaE(a, b) {
    return Math.sqrt(Math.pow(b.lab.l - a.lab.l, 2) + Math.pow(b.lab.a - a.lab.a, 2) + Math.pow(b.lab.b - a.lab.b, 2))
}

Here is my example document:

In this example I have four layers named Corgi, Tennis Racquet, Runner, and Bowling Ball and Pin as well as a background layer. The current code generates a list of hex codes which I put in a note. I can shift the background color into it's own array so that my note reads

"Background: Hex1

Hex2

Hex3

Hex4

etc."

But what I really want is a note like this:

"Background: Hex1

Layer 1

Hex2

Hex3

Layer 2

Hex2

Hex4

etc."

I understand that in this code to read the colors a temporary raw file is made and read, ignoring all the layers. Is there a way to read the colors layer by layer or somehow sort the colors after the colors are read?

I really appreciate any help anyone can offer! 

[c.pfaffenbichler]

You can hide all and show each Layer in turn and run the opration once per Layer.

As far as I can tell the Raw has no transparency, so a background would be introduced and change the quantity of the white pixels. 

[r-bin · Accepted solution]

As far as I can tell the Raw has no transparency, so ....

By @c.pfaffenbichler

[c.pfaffenbichler]

Thanks, @r-bin ! 

Then the OP should be able to run the operation on each Layer in turn and get meaningul quantities. 

[c.pfaffenbichler]

Were you able to Script the necessary steps? 

[Zee333]

Unfortunately I'm still pretty new at scripting so not yet, I am trying though. I have a script that hides all layers and shows them one at a time but I'm having trouble getting the color reading to work in the context of a plugin or my layer cycling script to work outside the context of a plugin (I don't understand how the color reading code works very well)

const app = require("photoshop").app;
const activeLayers = app.activeDocument.activeLayers;

function circulateLayers() {
    activeLayers.visible = false
//sets all selected layers to hidden
    activeLayers.forEach(layer => {
  //shows one layer at a time
      layer.visible = true; 
  
     //Needs to read document colors and push them into an array named after the layer
     const DE_CIE76 = 0; //color difference: 0-255
     const THRESHOLD = 0; //color pixels threshold
//Modified Color Reading Code

        var s2t = stringIDToTypeID,
            t2s = typeIDToStringID,
            colorsObj = {},
            colorsArr = [],
            tempArr = [];
        (r = new ActionReference()).putProperty(s2t('property'), p = s2t('mode'));
        r.putEnumerated(s2t('document'), s2t('ordinal'), s2t('targetEnum'));
        if (t2s(executeActionGet(r).getEnumerationValue(p)) == 'RGBColor') {
            var f = new File(Folder.temp + '/colors.raw');
            (d = new ActionDescriptor()).putBoolean(s2t("channelsInterleaved"), true);
            d.putBoolean(s2t('copy'), true);
            (d1 = new ActionDescriptor()).putObject(s2t("as"), s2t("rawFormat"), d);
            d1.putPath(s2t("in"), f);
            executeAction(s2t("save"), d1, DialogModes.NO);
            f.open('r');
            f.encoding = "BINARY";
            doForcedProgress('Reading colors', 'readColors(f.read(), colorsObj)');
            f.close();
            f.remove();
            for (var a in colorsObj) if (colorsObj[a] > THRESHOLD) tempArr.push({hex: a });
            if (DE_CIE76) doForcedProgress('Filtering colors by dE = ' + DE_CIE76, 'filterByDE(colorsArr)');
            }
            colorsArr.concat(tempArr);
     
    layer.visible = false; 
    console.log("Here I Go!") 
})
console.log(activeLayers.length)
     activeLayers.forEach(layer => {
      layer.visible = true; 
      console.log("Here I Am Again!") 
     })
 
    }

    function readColors(s, colorsObj) {
      for (var i = 0; i < s.length; i += 3) {
          var cur = toHex(s, i, 3)
          updateProgress(i, s.length)
          if (colorsObj[cur]) colorsObj[cur]++; else colorsObj[cur] = 1;
      }
    }
    function toHex(s, from, bits) {
      var hex = '';
      for (var i = from; i < from + bits; i++) h += (('0' + s.charCodeAt(i).toString(16)).slice(-2));
      return hex
    }

///////////////////////////////////////////////////////////////////////////////////

// Insert text in this created note

///////////////////////////////////////////////////////////////////////////////////

var idsetd = charIDToTypeID( "setd" );

    var desc58 = new ActionDescriptor();

    var idnull = charIDToTypeID( "null" );

        var ref12 = new ActionReference();

        var idannotation = stringIDToTypeID( "annotation" );

        ref12.putIndex( idannotation, 0 ); // the number/index of note

    desc58.putReference( idnull, ref12 );

    var idT = charIDToTypeID( "T   " );

        var desc59 = new ActionDescriptor();

        var idTxtD = charIDToTypeID( "TxtD" );

        desc59.putData( idTxtD, String.fromCharCode( 255, 254, 116, 0, 104, 0, 105, 0, 115, 0, 32, 0, 105, 0, 115, 0, 32, 0, 116, 0, 101, 0, 120, 0, 116, 0, 32, 0, 105, 0, 110, 0, 

32, 0, 97, 0, 32, 0, 110, 0, 111, 0, 116, 0, 101, 0 ) );

        var idtext = stringIDToTypeID( "text" );
       
        desc59.putString( idtext, colorsArr.join("   "));

    var idannotation = stringIDToTypeID( "annotation" );

    desc58.putObject( idT, idannotation, desc59 );

executeAction( idsetd, desc58, DialogModes.NO );

 Here is what I have so far. Right now, it stops at  

activeLayers.forEach(layer => { because the code I wrote for this I wrote in a plugin and it doesn't work when I just run it as a script. Any documentation on how scripting for photoshop differs as straight script vs script in a plugin would be helpful to me. I know it's messy and incomplete but that's where I'm at, thanks for checking in!