@tjieco/library
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TypeScript port of ZXing multi-format 1D/2D barcode image processing library, with Code128 and ITF support.
169 lines • 7.5 kB
JavaScript
;
/*
* Copyright 2009 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.
*/
Object.defineProperty(exports, "__esModule", { value: true });
var QRCodeReader_1 = require("./qrcode/QRCodeReader");
var Exception_1 = require("./Exception");
var MultiFormatOneDReader_1 = require("./oned/MultiFormatOneDReader");
/*namespace com.google.zxing {*/
/**
* MultiFormatReader is a convenience class and the main entry point into the library for most uses.
* By default it attempts to decode all barcode formats that the library supports. Optionally, you
* can provide a hints object to request different behavior, for example only decoding QR codes.
*
* @author Sean Owen
* @author dswitkin@google.com (Daniel Switkin)
*/
var MultiFormatReader = /** @class */ (function () {
function MultiFormatReader() {
}
/**
* This version of decode honors the intent of Reader.decode(BinaryBitmap) in that it
* passes null as a hint to the decoders. However, that makes it inefficient to call repeatedly.
* Use setHints() followed by decodeWithState() for continuous scan applications.
*
* @param image The pixel data to decode
* @return The contents of the image
* @throws NotFoundException Any errors which occurred
*/
/*@Override*/
// public decode(image: BinaryBitmap): Result /*throws NotFoundException */ {
// setHints(null)
// return decodeInternal(image)
// }
/**
* Decode an image using the hints provided. Does not honor existing state.
*
* @param image The pixel data to decode
* @param hints The hints to use, clearing the previous state.
* @return The contents of the image
* @throws NotFoundException Any errors which occurred
*/
/*@Override*/
MultiFormatReader.prototype.decode = function (image, hints) {
this.setHints(hints);
return this.decodeInternal(image);
};
/**
* Decode an image using the state set up by calling setHints() previously. Continuous scan
* clients will get a <b>large</b> speed increase by using this instead of decode().
*
* @param image The pixel data to decode
* @return The contents of the image
* @throws NotFoundException Any errors which occurred
*/
MultiFormatReader.prototype.decodeWithState = function (image) {
// Make sure to set up the default state so we don't crash
if (this.readers === null || this.readers === undefined) {
this.setHints(null);
}
return this.decodeInternal(image);
};
/**
* This method adds state to the MultiFormatReader. By setting the hints once, subsequent calls
* to decodeWithState(image) can reuse the same set of readers without reallocating memory. This
* is important for performance in continuous scan clients.
*
* @param hints The set of hints to use for subsequent calls to decode(image)
*/
MultiFormatReader.prototype.setHints = function (hints) {
this.hints = hints;
var tryHarder = hints !== null && hints !== undefined && undefined !== hints.get(3 /* TRY_HARDER */);
/*@SuppressWarnings("unchecked")*/
var formats = hints === null || hints === undefined ? null : hints.get(2 /* POSSIBLE_FORMATS */);
var readers = new Array();
if (formats !== null && formats !== undefined) {
var addOneDReader = formats.contains(14 /* UPC_A */) ||
formats.contains(15 /* UPC_E */) ||
formats.contains(7 /* EAN_13 */) ||
formats.contains(6 /* EAN_8 */) ||
formats.contains(1 /* CODABAR */) ||
formats.contains(2 /* CODE_39 */) ||
formats.contains(3 /* CODE_93 */) ||
formats.contains(4 /* CODE_128 */) ||
formats.contains(8 /* ITF */) ||
formats.contains(12 /* RSS_14 */) ||
formats.contains(13 /* RSS_EXPANDED */);
// Put 1D readers upfront in "normal" mode
// TYPESCRIPTPORT: TODO: uncomment below as they are ported
if (addOneDReader && !tryHarder) {
readers.push(new MultiFormatOneDReader_1.default(hints));
}
if (formats.contains(11 /* QR_CODE */)) {
readers.push(new QRCodeReader_1.default());
}
// if (formats.contains(BarcodeFormat.DATA_MATRIX)) {
// readers.push(new DataMatrixReader())
// }
// if (formats.contains(BarcodeFormat.AZTEC)) {
// readers.push(new AztecReader())
// }
// if (formats.contains(BarcodeFormat.PDF_417)) {
// readers.push(new PDF417Reader())
// }
// if (formats.contains(BarcodeFormat.MAXICODE)) {
// readers.push(new MaxiCodeReader())
// }
// At end in "try harder" mode
if (addOneDReader && tryHarder) {
readers.push(new MultiFormatOneDReader_1.default(hints));
}
}
if (readers.length === 0) {
if (!tryHarder) {
readers.push(new MultiFormatOneDReader_1.default(hints));
}
readers.push(new QRCodeReader_1.default());
// readers.push(new DataMatrixReader())
// readers.push(new AztecReader())
// readers.push(new PDF417Reader())
// readers.push(new MaxiCodeReader())
if (tryHarder) {
readers.push(new MultiFormatOneDReader_1.default(hints));
}
}
this.readers = readers; // .toArray(new Reader[readers.size()])
};
/*@Override*/
MultiFormatReader.prototype.reset = function () {
if (this.readers !== null) {
for (var i = 0, length_1 = this.readers.length; i !== length_1; i++) {
var reader = this.readers[i];
reader.reset();
}
}
};
MultiFormatReader.prototype.decodeInternal = function (image) {
if (this.readers !== null) {
for (var i = 0, length_2 = this.readers.length; i !== length_2; i++) {
var reader = this.readers[i];
try {
return reader.decode(image, this.hints);
}
catch (re /*ReaderException*/) {
// console.log(`Exception ${re.type} ${re.message}`)
if (re.type === 'ReaderException') {
continue;
}
}
}
}
throw new Exception_1.default(Exception_1.default.NotFoundException);
};
return MultiFormatReader;
}());
exports.default = MultiFormatReader;
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