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/*
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.
*/
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 Array(new DataMask000(), new DataMask001(), new DataMask010(), new DataMask011(), new DataMask100(), new DataMask101(), new DataMask110(), new DataMask111());