更新

TongjiUniApp/node_modules/qrcode-reader/src/bitmat.js

@@ -0,0 +1,94 @@
+/*
+  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';
+
+export default function BitMatrix(width,  height) {
+  if (!height)
+    height = width;
+  if (width < 1 || height < 1) {
+    throw "Both dimensions must be greater than 0";
+  }
+  this.width = width;
+  this.height = height;
+  var rowSize = width >> 5;
+  if ((width & 0x1f) != 0) {
+    rowSize++;
+  }
+  this.rowSize = rowSize;
+  this.bits = new Array(rowSize * height);
+  for (var i = 0; i < this.bits.length; i++)
+    this.bits[i] = 0;
+}
+
+Object.defineProperty(BitMatrix.prototype, "Dimension", {
+  get: function() {
+    if (this.width != this.height) {
+      throw "Can't call getDimension() on a non-square matrix";
+    }
+    return this.width;
+  }
+});
+
+BitMatrix.prototype.get_Renamed = function(x, y) {
+  var offset = y * this.rowSize + (x >> 5);
+  return ((URShift(this.bits[offset], (x & 0x1f))) & 1) != 0;
+};
+
+BitMatrix.prototype.set_Renamed = function(x, y) {
+  var offset = y * this.rowSize + (x >> 5);
+  this.bits[offset] |= 1 << (x & 0x1f);
+};
+
+BitMatrix.prototype.flip = function(x, y) {
+  var offset = y * this.rowSize + (x >> 5);
+  this.bits[offset] ^= 1 << (x & 0x1f);
+};
+
+BitMatrix.prototype.clear = function() {
+  var max = this.bits.length;
+  for (var i = 0; i < max; i++) {
+    this.bits[i] = 0;
+  }
+};
+
+BitMatrix.prototype.setRegion = function(left, top, width, height) {
+  if (top < 0 || left < 0) {
+    throw "Left and top must be nonnegative";
+  }
+  if (height < 1 || width < 1) {
+    throw "Height and width must be at least 1";
+  }
+  var right = left + width;
+  var bottom = top + height;
+  if (bottom > this.height || right > this.width) {
+    throw "The region must fit inside the matrix";
+  }
+  for (var y = top; y < bottom; y++) {
+    var offset = y * this.rowSize;
+    for (var x = left; x < right; x++) {
+      this.bits[offset + (x >> 5)] |= 1 << (x & 0x1f);
+    }
+  }
+};