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111 lines
2.5 KiB
111 lines
2.5 KiB
/*
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Ported to JavaScript by Lazar Laszlo 2011
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lazarsoft@gmail.com, www.lazarsoft.info
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*/
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/*
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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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function BitMatrix( width, height)
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{
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if(!height)
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height=width;
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if (width < 1 || height < 1)
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{
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throw "Both dimensions must be greater than 0";
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}
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this.width = width;
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this.height = height;
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var rowSize = width >> 5;
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if ((width & 0x1f) != 0)
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{
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rowSize++;
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}
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this.rowSize = rowSize;
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this.bits = new Array(rowSize * height);
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for(var i=0;i<this.bits.length;i++)
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this.bits[i]=0;
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this.__defineGetter__("Width", function()
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{
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return this.width;
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});
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this.__defineGetter__("Height", function()
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{
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return this.height;
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});
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this.__defineGetter__("Dimension", function()
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{
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if (this.width != this.height)
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{
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throw "Can't call getDimension() on a non-square matrix";
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}
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return this.width;
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});
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this.get_Renamed=function( x, y)
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{
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var offset = y * this.rowSize + (x >> 5);
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return ((URShift(this.bits[offset], (x & 0x1f))) & 1) != 0;
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}
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this.set_Renamed=function( x, y)
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{
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var offset = y * this.rowSize + (x >> 5);
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this.bits[offset] |= 1 << (x & 0x1f);
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}
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this.flip=function( x, y)
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{
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var offset = y * this.rowSize + (x >> 5);
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this.bits[offset] ^= 1 << (x & 0x1f);
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}
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this.clear=function()
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{
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var max = this.bits.length;
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for (var i = 0; i < max; i++)
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{
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this.bits[i] = 0;
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}
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}
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this.setRegion=function( left, top, width, height)
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{
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if (top < 0 || left < 0)
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{
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throw "Left and top must be nonnegative";
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}
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if (height < 1 || width < 1)
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{
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throw "Height and width must be at least 1";
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}
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var right = left + width;
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var bottom = top + height;
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if (bottom > this.height || right > this.width)
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{
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throw "The region must fit inside the matrix";
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}
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for (var y = top; y < bottom; y++)
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{
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var offset = y * this.rowSize;
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for (var x = left; x < right; x++)
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{
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this.bits[offset + (x >> 5)] |= 1 << (x & 0x1f);
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}
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}
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}
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}
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