"use strict";
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/*
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* Copyright 2007 ZXing authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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var __values = (this && this.__values) || function(o) {
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var s = typeof Symbol === "function" && Symbol.iterator, m = s && o[s], i = 0;
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if (m) return m.call(o);
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if (o && typeof o.length === "number") return {
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next: function () {
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if (o && i >= o.length) o = void 0;
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return { value: o && o[i++], done: !o };
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}
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};
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throw new TypeError(s ? "Object is not iterable." : "Symbol.iterator is not defined.");
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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/*namespace com.google.zxing.qrcode.decoder {*/
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var ErrorCorrectionLevel_1 = require("./ErrorCorrectionLevel");
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var Integer_1 = require("../../util/Integer");
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/**
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* <p>Encapsulates a QR Code's format information, including the data mask used and
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* error correction level.</p>
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*
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* @author Sean Owen
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* @see DataMask
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* @see ErrorCorrectionLevel
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*/
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var FormatInformation = /** @class */ (function () {
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function FormatInformation(formatInfo /*int*/) {
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// Bits 3,4
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this.errorCorrectionLevel = ErrorCorrectionLevel_1.default.forBits((formatInfo >> 3) & 0x03);
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// Bottom 3 bits
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this.dataMask = /*(byte) */ (formatInfo & 0x07);
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}
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FormatInformation.numBitsDiffering = function (a /*int*/, b /*int*/) {
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return Integer_1.default.bitCount(a ^ b);
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};
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/**
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* @param maskedFormatInfo1 format info indicator, with mask still applied
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* @param maskedFormatInfo2 second copy of same info; both are checked at the same time
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* to establish best match
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* @return information about the format it specifies, or {@code null}
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* if doesn't seem to match any known pattern
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*/
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FormatInformation.decodeFormatInformation = function (maskedFormatInfo1 /*int*/, maskedFormatInfo2 /*int*/) {
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var formatInfo = FormatInformation.doDecodeFormatInformation(maskedFormatInfo1, maskedFormatInfo2);
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if (formatInfo !== null) {
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return formatInfo;
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}
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// Should return null, but, some QR codes apparently
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// do not mask this info. Try again by actually masking the pattern
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// first
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return FormatInformation.doDecodeFormatInformation(maskedFormatInfo1 ^ FormatInformation.FORMAT_INFO_MASK_QR, maskedFormatInfo2 ^ FormatInformation.FORMAT_INFO_MASK_QR);
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};
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FormatInformation.doDecodeFormatInformation = function (maskedFormatInfo1 /*int*/, maskedFormatInfo2 /*int*/) {
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var e_1, _a;
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// Find the int in FORMAT_INFO_DECODE_LOOKUP with fewest bits differing
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var bestDifference = Number.MAX_SAFE_INTEGER;
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var bestFormatInfo = 0;
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try {
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for (var _b = __values(FormatInformation.FORMAT_INFO_DECODE_LOOKUP), _c = _b.next(); !_c.done; _c = _b.next()) {
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var decodeInfo = _c.value;
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var targetInfo = decodeInfo[0];
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if (targetInfo === maskedFormatInfo1 || targetInfo === maskedFormatInfo2) {
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// Found an exact match
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return new FormatInformation(decodeInfo[1]);
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}
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var bitsDifference = FormatInformation.numBitsDiffering(maskedFormatInfo1, targetInfo);
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if (bitsDifference < bestDifference) {
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bestFormatInfo = decodeInfo[1];
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bestDifference = bitsDifference;
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}
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if (maskedFormatInfo1 !== maskedFormatInfo2) {
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// also try the other option
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bitsDifference = FormatInformation.numBitsDiffering(maskedFormatInfo2, targetInfo);
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if (bitsDifference < bestDifference) {
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bestFormatInfo = decodeInfo[1];
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bestDifference = bitsDifference;
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}
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}
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}
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}
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catch (e_1_1) { e_1 = { error: e_1_1 }; }
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finally {
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try {
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if (_c && !_c.done && (_a = _b.return)) _a.call(_b);
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}
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finally { if (e_1) throw e_1.error; }
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}
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// Hamming distance of the 32 masked codes is 7, by construction, so <= 3 bits
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// differing means we found a match
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if (bestDifference <= 3) {
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return new FormatInformation(bestFormatInfo);
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}
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return null;
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};
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FormatInformation.prototype.getErrorCorrectionLevel = function () {
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return this.errorCorrectionLevel;
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};
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FormatInformation.prototype.getDataMask = function () {
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return this.dataMask;
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};
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/*@Override*/
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FormatInformation.prototype.hashCode = function () {
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return (this.errorCorrectionLevel.getBits() << 3) | this.dataMask;
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};
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/*@Override*/
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FormatInformation.prototype.equals = function (o) {
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if (!(o instanceof FormatInformation)) {
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return false;
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}
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var other = o;
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return this.errorCorrectionLevel === other.errorCorrectionLevel &&
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this.dataMask === other.dataMask;
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};
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FormatInformation.FORMAT_INFO_MASK_QR = 0x5412;
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/**
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* See ISO 18004:2006, Annex C, Table C.1
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*/
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FormatInformation.FORMAT_INFO_DECODE_LOOKUP = [
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Int32Array.from([0x5412, 0x00]),
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Int32Array.from([0x5125, 0x01]),
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Int32Array.from([0x5E7C, 0x02]),
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Int32Array.from([0x5B4B, 0x03]),
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Int32Array.from([0x45F9, 0x04]),
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Int32Array.from([0x40CE, 0x05]),
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Int32Array.from([0x4F97, 0x06]),
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Int32Array.from([0x4AA0, 0x07]),
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Int32Array.from([0x77C4, 0x08]),
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Int32Array.from([0x72F3, 0x09]),
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Int32Array.from([0x7DAA, 0x0A]),
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Int32Array.from([0x789D, 0x0B]),
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Int32Array.from([0x662F, 0x0C]),
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Int32Array.from([0x6318, 0x0D]),
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Int32Array.from([0x6C41, 0x0E]),
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Int32Array.from([0x6976, 0x0F]),
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Int32Array.from([0x1689, 0x10]),
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Int32Array.from([0x13BE, 0x11]),
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Int32Array.from([0x1CE7, 0x12]),
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Int32Array.from([0x19D0, 0x13]),
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Int32Array.from([0x0762, 0x14]),
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Int32Array.from([0x0255, 0x15]),
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Int32Array.from([0x0D0C, 0x16]),
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Int32Array.from([0x083B, 0x17]),
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Int32Array.from([0x355F, 0x18]),
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Int32Array.from([0x3068, 0x19]),
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Int32Array.from([0x3F31, 0x1A]),
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Int32Array.from([0x3A06, 0x1B]),
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Int32Array.from([0x24B4, 0x1C]),
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Int32Array.from([0x2183, 0x1D]),
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Int32Array.from([0x2EDA, 0x1E]),
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Int32Array.from([0x2BED, 0x1F]),
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];
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return FormatInformation;
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}());
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exports.default = FormatInformation;
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