From 4112ec46b159a9968c8f1130d2eca6a37eb5e5db Mon Sep 17 00:00:00 2001
From: Lokesh Dhakar <lokesh.dhakar@gmail.com>
Date: Sun, 21 Jul 2019 18:54:04 -0700
Subject: [PATCH] refactor: Create sep repo for quantize lib and import

---
 src/color-thief.js | 479 +--------------------------------------------
 1 file changed, 3 insertions(+), 476 deletions(-)

diff --git a/src/color-thief.js b/src/color-thief.js
index 09876f1..d355bce 100644
--- a/src/color-thief.js
+++ b/src/color-thief.js
@@ -1,3 +1,5 @@
+import quantize from '../node_modules/quantize/dist/index.mjs';
+
 /*
  * Color Thief v2.2.0
  * by Lokesh Dhakar - http://www.lokeshdhakar.com
@@ -115,7 +117,7 @@ ColorThief.prototype.getPalette = function(sourceImage, colorCount, quality) {
 
     // Send array to quantize function which clusters values
     // using median cut algorithm
-    var cmap    = MMCQ.quantize(pixelArray, colorCount);
+    var cmap    = quantize(pixelArray, colorCount);
     var palette = cmap? cmap.palette() : null;
 
     return palette;
@@ -167,479 +169,4 @@ ColorThief.prototype.getColorAsync = function(imageUrl, callback, quality) {
 };
 
 
-
-/*!
- * quantize.js Copyright 2008 Nick Rabinowitz.
- * Licensed under the MIT license: http://www.opensource.org/licenses/mit-license.php
- * @license
- */
-
-// fill out a couple protovis dependencies
-/*!
- * Block below copied from Protovis: http://mbostock.github.com/protovis/
- * Copyright 2010 Stanford Visualization Group
- * Licensed under the BSD License: http://www.opensource.org/licenses/bsd-license.php
- * @license
- */
-if (!pv) {
-    var pv = {
-        map: function(array, f) {
-          var o = {};
-          return f ? array.map(function(d, i) { o.index = i; return f.call(o, d); }) : array.slice();
-        },
-        naturalOrder: function(a, b) {
-            return (a < b) ? -1 : ((a > b) ? 1 : 0);
-        },
-        sum: function(array, f) {
-          var o = {};
-          return array.reduce(f ? function(p, d, i) { o.index = i; return p + f.call(o, d); } : function(p, d) { return p + d; }, 0);
-        },
-        max: function(array, f) {
-          return Math.max.apply(null, f ? pv.map(array, f) : array);
-        }
-    };
-}
-
-
-
-/**
- * Basic Javascript port of the MMCQ (modified median cut quantization)
- * algorithm from the Leptonica library (http://www.leptonica.com/).
- * Returns a color map you can use to map original pixels to the reduced
- * palette. Still a work in progress.
- *
- * @author Nick Rabinowitz
- * @example
-
-// array of pixels as [R,G,B] arrays
-var myPixels = [[190,197,190], [202,204,200], [207,214,210], [211,214,211], [205,207,207]
-                // etc
-                ];
-var maxColors = 4;
-
-var cmap = MMCQ.quantize(myPixels, maxColors);
-var newPalette = cmap.palette();
-var newPixels = myPixels.map(function(p) {
-    return cmap.map(p);
-});
-
- */
-var MMCQ = (function() {
-    // private constants
-    var sigbits = 5;
-    var rshift = 8 - sigbits;
-    var maxIterations = 1000;
-    var fractByPopulations = 0.75;
-
-    // get reduced-space color index for a pixel
-    function getColorIndex(r, g, b) {
-        return (r << (2 * sigbits)) + (g << sigbits) + b;
-    }
-
-    // Simple priority queue
-    function PQueue(comparator) {
-        var contents = [];
-        var sorted = false;
-
-        function sort() {
-            contents.sort(comparator);
-            sorted = true;
-        }
-
-        return {
-            push: function(o) {
-                contents.push(o);
-                sorted = false;
-            },
-            peek: function(index) {
-                if (!sorted) sort();
-                if (index===undefined) index = contents.length - 1;
-                return contents[index];
-            },
-            pop: function() {
-                if (!sorted) sort();
-                return contents.pop();
-            },
-            size: function() {
-                return contents.length;
-            },
-            map: function(f) {
-                return contents.map(f);
-            },
-            debug: function() {
-                if (!sorted) sort();
-                return contents;
-            }
-        };
-    }
-
-    // 3d color space box
-    function VBox(r1, r2, g1, g2, b1, b2, histo) {
-        var vbox = this;
-        vbox.r1 = r1;
-        vbox.r2 = r2;
-        vbox.g1 = g1;
-        vbox.g2 = g2;
-        vbox.b1 = b1;
-        vbox.b2 = b2;
-        vbox.histo = histo;
-    }
-    VBox.prototype = {
-        volume: function(force) {
-            var vbox = this;
-            if (!vbox._volume || force) {
-                vbox._volume = ((vbox.r2 - vbox.r1 + 1) * (vbox.g2 - vbox.g1 + 1) * (vbox.b2 - vbox.b1 + 1));
-            }
-            return vbox._volume;
-        },
-        count: function(force) {
-            var vbox = this;
-            var histo = vbox.histo;
-            if (!vbox._count_set || force) {
-                var npix = 0;
-                var index; var i; var j; var k;
-                for (i = vbox.r1; i <= vbox.r2; i++) {
-                    for (j = vbox.g1; j <= vbox.g2; j++) {
-                        for (k = vbox.b1; k <= vbox.b2; k++) {
-                             index = getColorIndex(i,j,k);
-                             npix += (histo[index] || 0);
-                        }
-                    }
-                }
-                vbox._count = npix;
-                vbox._count_set = true;
-            }
-            return vbox._count;
-        },
-        copy: function() {
-            var vbox = this;
-            return new VBox(vbox.r1, vbox.r2, vbox.g1, vbox.g2, vbox.b1, vbox.b2, vbox.histo);
-        },
-        avg: function(force) {
-            var vbox = this;
-            var histo = vbox.histo;
-            if (!vbox._avg || force) {
-                var ntot = 0;
-                var mult = 1 << (8 - sigbits);
-                var rsum = 0;
-                var gsum = 0;
-                var bsum = 0;
-                var hval;
-                var i, j, k;
-                var histoindex;
-                for (i = vbox.r1; i <= vbox.r2; i++) {
-                    for (j = vbox.g1; j <= vbox.g2; j++) {
-                        for (k = vbox.b1; k <= vbox.b2; k++) {
-                             histoindex = getColorIndex(i,j,k);
-                             hval = histo[histoindex] || 0;
-                             ntot += hval;
-                             rsum += (hval * (i + 0.5) * mult);
-                             gsum += (hval * (j + 0.5) * mult);
-                             bsum += (hval * (k + 0.5) * mult);
-                        }
-                    }
-                }
-                if (ntot) {
-                    vbox._avg = [~~(rsum/ntot), ~~(gsum/ntot), ~~(bsum/ntot)];
-                } else {
-                    // console.log('empty box');
-                    vbox._avg = [
-                        ~~(mult * (vbox.r1 + vbox.r2 + 1) / 2),
-                        ~~(mult * (vbox.g1 + vbox.g2 + 1) / 2),
-                        ~~(mult * (vbox.b1 + vbox.b2 + 1) / 2)
-                    ];
-                }
-            }
-            return vbox._avg;
-        },
-        contains: function(pixel) {
-            var vbox = this;
-            var rval = pixel[0] >> rshift;
-            var gval = pixel[1] >> rshift;
-            var bval = pixel[2] >> rshift;
-            return (rval >= vbox.r1 && rval <= vbox.r2 &&
-                    gval >= vbox.g1 && gval <= vbox.g2 &&
-                    bval >= vbox.b1 && bval <= vbox.b2);
-        }
-    };
-
-    // Color map
-    function CMap() {
-        this.vboxes = new PQueue(function(a,b) {
-            return pv.naturalOrder(
-                a.vbox.count()*a.vbox.volume(),
-                b.vbox.count()*b.vbox.volume()
-            );
-        });
-    }
-    CMap.prototype = {
-        push: function(vbox) {
-            this.vboxes.push({
-                vbox: vbox,
-                color: vbox.avg()
-            });
-        },
-        palette: function() {
-            return this.vboxes.map(function(vb) { return vb.color; });
-        },
-        size: function() {
-            return this.vboxes.size();
-        },
-        map: function(color) {
-            var vboxes = this.vboxes;
-            for (var i=0; i<vboxes.size(); i++) {
-                if (vboxes.peek(i).vbox.contains(color)) {
-                    return vboxes.peek(i).color;
-                }
-            }
-            return this.nearest(color);
-        },
-        nearest: function(color) {
-            var vboxes = this.vboxes;
-            var d1;
-            var d2;
-            var pColor;
-            for (var i=0; i<vboxes.size(); i++) {
-                d2 = Math.sqrt(
-                    Math.pow(color[0] - vboxes.peek(i).color[0], 2) +
-                    Math.pow(color[1] - vboxes.peek(i).color[1], 2) +
-                    Math.pow(color[2] - vboxes.peek(i).color[2], 2)
-                );
-                if (d2 < d1 || d1 === undefined) {
-                    d1 = d2;
-                    pColor = vboxes.peek(i).color;
-                }
-            }
-            return pColor;
-        },
-        forcebw: function() {
-            // XXX: won't  work yet
-            var vboxes = this.vboxes;
-            vboxes.sort(function(a,b) { return pv.naturalOrder(pv.sum(a.color), pv.sum(b.color));});
-
-            // force darkest color to black if everything < 5
-            var lowest = vboxes[0].color;
-            if (lowest[0] < 5 && lowest[1] < 5 && lowest[2] < 5)
-                vboxes[0].color = [0,0,0];
-
-            // force lightest color to white if everything > 251
-            var idx = vboxes.length-1;
-            var highest = vboxes[idx].color;
-            if (highest[0] > 251 && highest[1] > 251 && highest[2] > 251)
-                vboxes[idx].color = [255,255,255];
-        }
-    };
-
-    // histo (1-d array, giving the number of pixels in
-    // each quantized region of color space), or null on error
-    function getHisto(pixels) {
-        var histosize = 1 << (3 * sigbits);
-        var histo = new Array(histosize);
-        var index; var rval; var gval; var bval;
-        pixels.forEach(function(pixel) {
-            rval = pixel[0] >> rshift;
-            gval = pixel[1] >> rshift;
-            bval = pixel[2] >> rshift;
-            index = getColorIndex(rval, gval, bval);
-            histo[index] = (histo[index] || 0) + 1;
-        });
-        return histo;
-    }
-
-    function vboxFromPixels(pixels, histo) {
-        var rmin=1000000; var rmax=0;
-        var gmin=1000000; var gmax=0;
-        var bmin=1000000; var bmax=0;
-        var rval; var gval; var bval;
-        // find min/max
-        pixels.forEach(function(pixel) {
-            rval = pixel[0] >> rshift;
-            gval = pixel[1] >> rshift;
-            bval = pixel[2] >> rshift;
-            if (rval < rmin) rmin = rval;
-            else if (rval > rmax) rmax = rval;
-            if (gval < gmin) gmin = gval;
-            else if (gval > gmax) gmax = gval;
-            if (bval < bmin) bmin = bval;
-            else if (bval > bmax)  bmax = bval;
-        });
-        return new VBox(rmin, rmax, gmin, gmax, bmin, bmax, histo);
-    }
-
-    function medianCutApply(histo, vbox) {
-        if (!vbox.count()) return;
-
-        var rw = vbox.r2 - vbox.r1 + 1;
-        var gw = vbox.g2 - vbox.g1 + 1;
-        var bw = vbox.b2 - vbox.b1 + 1;
-        var maxw = pv.max([rw, gw, bw]);
-        // only one pixel, no split
-        if (vbox.count() == 1) {
-            return [vbox.copy()];
-        }
-        /* Find the partial sum arrays along the selected axis. */
-        var total = 0;
-        var partialsum = [];
-        var lookaheadsum = [];
-        var i; var j; var k; var sum; var index;
-        if (maxw == rw) {
-            for (i = vbox.r1; i <= vbox.r2; i++) {
-                sum = 0;
-                for (j = vbox.g1; j <= vbox.g2; j++) {
-                    for (k = vbox.b1; k <= vbox.b2; k++) {
-                        index = getColorIndex(i,j,k);
-                        sum += (histo[index] || 0);
-                    }
-                }
-                total += sum;
-                partialsum[i] = total;
-            }
-        }
-        else if (maxw == gw) {
-            for (i = vbox.g1; i <= vbox.g2; i++) {
-                sum = 0;
-                for (j = vbox.r1; j <= vbox.r2; j++) {
-                    for (k = vbox.b1; k <= vbox.b2; k++) {
-                        index = getColorIndex(j,i,k);
-                        sum += (histo[index] || 0);
-                    }
-                }
-                total += sum;
-                partialsum[i] = total;
-            }
-        }
-        else {  /* maxw == bw */
-            for (i = vbox.b1; i <= vbox.b2; i++) {
-                sum = 0;
-                for (j = vbox.r1; j <= vbox.r2; j++) {
-                    for (k = vbox.g1; k <= vbox.g2; k++) {
-                        index = getColorIndex(j,k,i);
-                        sum += (histo[index] || 0);
-                    }
-                }
-                total += sum;
-                partialsum[i] = total;
-            }
-        }
-        partialsum.forEach(function(d,i) {
-            lookaheadsum[i] = total-d;
-        });
-        function doCut(color) {
-            var dim1 = color + '1';
-            var dim2 = color + '2';
-            var left; var right; var vbox1; var vbox2; var d2; var count2=0;
-            for (i = vbox[dim1]; i <= vbox[dim2]; i++) {
-                if (partialsum[i] > total / 2) {
-                    vbox1 = vbox.copy();
-                    vbox2 = vbox.copy();
-                    left = i - vbox[dim1];
-                    right = vbox[dim2] - i;
-                    if (left <= right)
-                        d2 = Math.min(vbox[dim2] - 1, ~~(i + right / 2));
-                    else d2 = Math.max(vbox[dim1], ~~(i - 1 - left / 2));
-                    // avoid 0-count boxes
-                    while (!partialsum[d2]) d2++;
-                    count2 = lookaheadsum[d2];
-                    while (!count2 && partialsum[d2-1]) count2 = lookaheadsum[--d2];
-                    // set dimensions
-                    vbox1[dim2] = d2;
-                    vbox2[dim1] = vbox1[dim2] + 1;
-//                    console.log('vbox counts:', vbox.count(), vbox1.count(), vbox2.count());
-                    return [vbox1, vbox2];
-                }
-            }
-
-        }
-        // determine the cut planes
-        return maxw == rw ? doCut('r') :
-            maxw == gw ? doCut('g') :
-            doCut('b');
-    }
-
-    function quantize(pixels, maxcolors) {
-        // short-circuit
-        if (!pixels.length || maxcolors < 2 || maxcolors > 256) {
-//            console.log('wrong number of maxcolors');
-            return false;
-        }
-
-        // XXX: check color content and convert to grayscale if insufficient
-
-        var histo = getHisto(pixels);
-        // histosize = 1 << (3 * sigbits);
-
-        // check that we aren't below maxcolors already
-        var nColors = 0;
-        histo.forEach(function() { nColors++; });
-        if (nColors <= maxcolors) {
-            // XXX: generate the new colors from the histo and return
-        }
-
-        // get the beginning vbox from the colors
-        var vbox = vboxFromPixels(pixels, histo);
-            var pq = new PQueue(function(a,b) { return pv.naturalOrder(a.count(), b.count()); });
-        pq.push(vbox);
-
-        // inner function to do the iteration
-        function iter(lh, target) {
-            var ncolors = 1;
-            var niters = 0;
-            var vbox;
-            while (niters < maxIterations) {
-                vbox = lh.pop();
-                if (!vbox.count())  { /* just put it back */
-                    lh.push(vbox);
-                    niters++;
-                    continue;
-                }
-                // do the cut
-                var vboxes = medianCutApply(histo, vbox);
-                    var vbox1 = vboxes[0];
-                    var vbox2 = vboxes[1];
-
-                if (!vbox1) {
-//                  console.log("vbox1 not defined; shouldn't happen!");
-                    return;
-                }
-                lh.push(vbox1);
-                if (vbox2) {  /* vbox2 can be null */
-                    lh.push(vbox2);
-                    ncolors++;
-                }
-                if (ncolors >= target) return;
-                if (niters++ > maxIterations) {
-//                    console.log("infinite loop; perhaps too few pixels!");
-                    return;
-                }
-            }
-        }
-
-        // first set of colors, sorted by population
-        iter(pq, fractByPopulations * maxcolors);
-
-        // Re-sort by the product of pixel occupancy times the size in color space.
-        var pq2 = new PQueue(function(a,b) {
-            return pv.naturalOrder(a.count()*a.volume(), b.count()*b.volume());
-        });
-        while (pq.size()) {
-            pq2.push(pq.pop());
-        }
-
-        // next set - generate the median cuts using the (npix * vol) sorting.
-        iter(pq2, maxcolors - pq2.size());
-
-        // calculate the actual colors
-        var cmap = new CMap();
-        while (pq2.size()) {
-            cmap.push(pq2.pop());
-        }
-
-        return cmap;
-    }
-
-    return {
-        quantize: quantize
-    };
-})();
-
 export default ColorThief;