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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 = () => ({
threshold(_ref, cb) {
let {
max,
replace = 255,
autoGreyscale = true
} = _ref;
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, (x, y, idx) => {
const 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;
module.exports = exports.default;
module.exports.default = exports.default;
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