forked from PeculiarVentures/js-zxing-pdf417
/
LuminanceSource.js
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/
LuminanceSource.js
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//
// Ported to JavaScript by Patrizio Bruno 2015
//
// desertconsulting@gmail.com, https://github.com/PeculiarVentures/idscanjs
//
//
// 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.
///
ZXing.LuminanceSource = function (width, height) {
this.width = 0;
this.height = 0;
this.width = width;
this.height = height;
};
ZXing.LuminanceSource.prototype.get_Width = function () {
return this.width;
};
ZXing.LuminanceSource.prototype.set_Width = function (value) {
this.width = value;
};
ZXing.LuminanceSource.prototype.get_Height = function () {
return this.height;
};
ZXing.LuminanceSource.prototype.set_Height = function (value) {
this.height = value;
};
ZXing.LuminanceSource.prototype.get_CropSupported = function () {
return false;
};
ZXing.LuminanceSource.prototype.crop = function (left, top, width, height) {
throw new Error("This luminance source does not support cropping.");
};
ZXing.LuminanceSource.prototype.get_RotateSupported = function () {
return false;
};
ZXing.LuminanceSource.prototype.rotateCounterClockwise = function () {
throw new Error("This luminance source does not support rotation.");
};
ZXing.LuminanceSource.prototype.rotateCounterClockwise45 = function () {
throw new Error("This luminance source does not support rotation by 45 degrees.");
};
ZXing.LuminanceSource.prototype.get_InversionSupported = function () {
return false;
};
ZXing.LuminanceSource.prototype.invert = function () {
throw new Error("This luminance source does not support inversion.");
};
ZXing.LuminanceSource.prototype.toString = function () {
var row = new Uint8Array(this.width);
var result = "";
for (var y = 0; y < this.height; y++) {
row = this.getRow(y, row);
for (var x = 0; x < this.width; x++) {
var luminance = row[x] & 255;
var c;
if (luminance < 64) {
c = "#";
}
else if (luminance < 128) {
c = "+";
}
else if (luminance < 192) {
c = ".";
}
else {
c = " ";
}
result += c;
}
result += "\n";
}
return result;
};