yeet

node_modules/@jimp/plugin-normalize/es/index.js

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+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports["default"] = void 0;
+
+var _utils = require("@jimp/utils");
+
+/**
+ * Get an image's histogram
+ * @return {object} An object with an array of color occurrence counts for each channel (r,g,b)
+ */
+function histogram() {
+  var histogram = {
+    r: new Array(256).fill(0),
+    g: new Array(256).fill(0),
+    b: new Array(256).fill(0)
+  };
+  this.scanQuiet(0, 0, this.bitmap.width, this.bitmap.height, function (x, y, index) {
+    histogram.r[this.bitmap.data[index + 0]]++;
+    histogram.g[this.bitmap.data[index + 1]]++;
+    histogram.b[this.bitmap.data[index + 2]]++;
+  });
+  return histogram;
+}
+/**
+ * Normalize values
+ * @param  {integer} value Pixel channel value.
+ * @param  {integer} min   Minimum value for channel
+ * @param  {integer} max   Maximum value for channel
+ * @return {integer} normalized values
+ */
+
+
+var _normalize = function normalize(value, min, max) {
+  return (value - min) * 255 / (max - min);
+};
+
+var getBounds = function getBounds(histogramChannel) {
+  return [histogramChannel.findIndex(function (value) {
+    return value > 0;
+  }), 255 - histogramChannel.slice().reverse().findIndex(function (value) {
+    return value > 0;
+  })];
+};
+/**
+ * Normalizes the image
+ * @param {function(Error, Jimp)} cb (optional) a callback for when complete
+ * @returns {Jimp} this for chaining of methods
+ */
+
+
+var _default = function _default() {
+  return {
+    normalize: function normalize(cb) {
+      var h = histogram.call(this); // store bounds (minimum and maximum values)
+
+      var bounds = {
+        r: getBounds(h.r),
+        g: getBounds(h.g),
+        b: getBounds(h.b)
+      }; // apply value transformations
+
+      this.scanQuiet(0, 0, this.bitmap.width, this.bitmap.height, function (x, y, idx) {
+        var r = this.bitmap.data[idx + 0];
+        var g = this.bitmap.data[idx + 1];
+        var b = this.bitmap.data[idx + 2];
+        this.bitmap.data[idx + 0] = _normalize(r, bounds.r[0], bounds.r[1]);
+        this.bitmap.data[idx + 1] = _normalize(g, bounds.g[0], bounds.g[1]);
+        this.bitmap.data[idx + 2] = _normalize(b, bounds.b[0], bounds.b[1]);
+      });
+
+      if ((0, _utils.isNodePattern)(cb)) {
+        cb.call(this, null, this);
+      }
+
+      return this;
+    }
+  };
+};
+
+exports["default"] = _default;
+//# sourceMappingURL=index.js.map