初始化

uni_modules/UniDevTools/node_modules/@jimp/plugin-threshold/es/index.js

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+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports["default"] = void 0;
+
+var _utils = require("@jimp/utils");
+
+/**
+ * Applies a minimum color threshold to a greyscale image.  Converts image to greyscale by default
+ * @param {number} options object
+ *  max: A number auto limited between 0 - 255
+ *  replace: (optional) A number auto limited between 0 - 255 (default 255)
+ *  autoGreyscale: (optional) A boolean whether to apply greyscale beforehand (default true)
+ * @param {number} cb (optional) a callback for when complete
+ * @return {this} this for chaining of methods
+ */
+var _default = function _default() {
+  return {
+    threshold: function threshold(_ref, cb) {
+      var _this = this;
+
+      var max = _ref.max,
+          _ref$replace = _ref.replace,
+          replace = _ref$replace === void 0 ? 255 : _ref$replace,
+          _ref$autoGreyscale = _ref.autoGreyscale,
+          autoGreyscale = _ref$autoGreyscale === void 0 ? true : _ref$autoGreyscale;
+
+      if (typeof max !== 'number') {
+        return _utils.throwError.call(this, 'max must be a number', cb);
+      }
+
+      if (typeof replace !== 'number') {
+        return _utils.throwError.call(this, 'replace must be a number', cb);
+      }
+
+      if (typeof autoGreyscale !== 'boolean') {
+        return _utils.throwError.call(this, 'autoGreyscale must be a boolean', cb);
+      }
+
+      max = this.constructor.limit255(max);
+      replace = this.constructor.limit255(replace);
+
+      if (autoGreyscale) {
+        this.greyscale();
+      }
+
+      this.scanQuiet(0, 0, this.bitmap.width, this.bitmap.height, function (x, y, idx) {
+        var grey = _this.bitmap.data[idx] < max ? _this.bitmap.data[idx] : replace;
+        _this.bitmap.data[idx] = grey;
+        _this.bitmap.data[idx + 1] = grey;
+        _this.bitmap.data[idx + 2] = grey;
+      });
+
+      if ((0, _utils.isNodePattern)(cb)) {
+        cb.call(this, null, this);
+      }
+
+      return this;
+    }
+  };
+};
+
+exports["default"] = _default;
+//# sourceMappingURL=index.js.map