sports-miniapp/node_modules/qrcode-reader/src/datamask.js

/*
  Ported to JavaScript by Lazar Laszlo 2011

  lazarsoft@gmail.com, www.lazarsoft.info

*/

/*
*
* Copyright 2007 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*      http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

import {URShift} from './qrcode';

var DataMask = {};

DataMask.forReference = function(reference) {
  if (reference < 0 || reference > 7) {
    throw "System.ArgumentException";
  }
  return DataMask.DATA_MASKS[reference];
};

function DataMask000() {
  this.unmaskBitMatrix = function(bits,  dimension) {
    for (var i = 0; i < dimension; i++) {
      for (var j = 0; j < dimension; j++) {
        if (this.isMasked(i, j)) {
          bits.flip(j, i);
        }
      }
    }
  };
  this.isMasked = function(i,  j) {
    return ((i + j) & 0x01) == 0;
  };
}

function DataMask001() {
  this.unmaskBitMatrix = function(bits,  dimension) {
    for (var i = 0; i < dimension; i++) {
      for (var j = 0; j < dimension; j++) {
        if (this.isMasked(i, j)) {
          bits.flip(j, i);
        }
      }
    }
  };
  this.isMasked = function(i,  j) {
    return (i & 0x01) == 0;
  };
}

function DataMask010() {
  this.unmaskBitMatrix = function(bits,  dimension) {
    for (var i = 0; i < dimension; i++) {
      for (var j = 0; j < dimension; j++) {
        if (this.isMasked(i, j)) {
          bits.flip(j, i);
        }
      }
    }
  };
  this.isMasked = function(i,  j) {
    return j % 3 == 0;
  };
}

function DataMask011() {
  this.unmaskBitMatrix = function(bits,  dimension) {
    for (var i = 0; i < dimension; i++) {
      for (var j = 0; j < dimension; j++) {
        if (this.isMasked(i, j)) {
          bits.flip(j, i);
        }
      }
    }
  };
  this.isMasked = function(i,  j) {
    return (i + j) % 3 == 0;
  };
}

function DataMask100() {
  this.unmaskBitMatrix = function(bits,  dimension) {
    for (var i = 0; i < dimension; i++) {
      for (var j = 0; j < dimension; j++) {
        if (this.isMasked(i, j)) {
          bits.flip(j, i);
        }
      }
    }
  };
  this.isMasked = function(i,  j) {
    return (((URShift(i, 1)) + (j / 3)) & 0x01) == 0;
  };
}

function DataMask101() {
  this.unmaskBitMatrix = function(bits,  dimension) {
    for (var i = 0; i < dimension; i++) {
      for (var j = 0; j < dimension; j++) {
        if (this.isMasked(i, j)) {
          bits.flip(j, i);
        }
      }
    }
  };
  this.isMasked = function(i,  j) {
    var temp = i * j;
    return (temp & 0x01) + (temp % 3) == 0;
  };
}

function DataMask110() {
  this.unmaskBitMatrix = function(bits,  dimension) {
    for (var i = 0; i < dimension; i++) {
      for (var j = 0; j < dimension; j++) {
        if (this.isMasked(i, j)) {
          bits.flip(j, i);
        }
      }
    }
  };
  this.isMasked = function(i,  j) {
    var temp = i * j;
    return (((temp & 0x01) + (temp % 3)) & 0x01) == 0;
  };
}
function DataMask111() {
  this.unmaskBitMatrix = function(bits,  dimension) {
    for (var i = 0; i < dimension; i++) {
      for (var j = 0; j < dimension; j++) {
        if (this.isMasked(i, j)) {
          bits.flip(j, i);
        }
      }
    }
  };
  this.isMasked = function(i,  j) {
    return ((((i + j) & 0x01) + ((i * j) % 3)) & 0x01) == 0;
  };
}

DataMask.DATA_MASKS = [new DataMask000(), new DataMask001(), new DataMask010(), new DataMask011(), new DataMask100(), new DataMask101(), new DataMask110(), new DataMask111()];

export default DataMask;