/*
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* Copyright 2009 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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import DecodeHintType from './DecodeHintType';
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import BarcodeFormat from './BarcodeFormat';
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import QRCodeReader from './qrcode/QRCodeReader';
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import AztecReader from './aztec/AztecReader';
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import MultiFormatOneDReader from './oned/MultiFormatOneDReader';
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import DataMatrixReader from './datamatrix/DataMatrixReader';
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import NotFoundException from './NotFoundException';
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import PDF417Reader from './pdf417/PDF417Reader';
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import ReaderException from './ReaderException';
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/*namespace com.google.zxing {*/
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/**
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* MultiFormatReader is a convenience class and the main entry point into the library for most uses.
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* By default it attempts to decode all barcode formats that the library supports. Optionally, you
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* can provide a hints object to request different behavior, for example only decoding QR codes.
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*
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* @author Sean Owen
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* @author dswitkin@google.com (Daniel Switkin)
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*/
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export default class MultiFormatReader {
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/**
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* This version of decode honors the intent of Reader.decode(BinaryBitmap) in that it
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* passes null as a hint to the decoders. However, that makes it inefficient to call repeatedly.
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* Use setHints() followed by decodeWithState() for continuous scan applications.
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*
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* @param image The pixel data to decode
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* @return The contents of the image
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*
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* @throws NotFoundException Any errors which occurred
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*/
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/*@Override*/
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// public decode(image: BinaryBitmap): Result {
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// setHints(null)
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// return decodeInternal(image)
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// }
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/**
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* Decode an image using the hints provided. Does not honor existing state.
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*
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* @param image The pixel data to decode
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* @param hints The hints to use, clearing the previous state.
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* @return The contents of the image
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*
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* @throws NotFoundException Any errors which occurred
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*/
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/*@Override*/
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decode(image, hints) {
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this.setHints(hints);
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return this.decodeInternal(image);
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}
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/**
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* Decode an image using the state set up by calling setHints() previously. Continuous scan
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* clients will get a <b>large</b> speed increase by using this instead of decode().
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*
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* @param image The pixel data to decode
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* @return The contents of the image
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*
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* @throws NotFoundException Any errors which occurred
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*/
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decodeWithState(image) {
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// Make sure to set up the default state so we don't crash
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if (this.readers === null || this.readers === undefined) {
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this.setHints(null);
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}
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return this.decodeInternal(image);
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}
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/**
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* This method adds state to the MultiFormatReader. By setting the hints once, subsequent calls
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* to decodeWithState(image) can reuse the same set of readers without reallocating memory. This
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* is important for performance in continuous scan clients.
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*
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* @param hints The set of hints to use for subsequent calls to decode(image)
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*/
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setHints(hints) {
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this.hints = hints;
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const tryHarder = hints !== null && hints !== undefined && undefined !== hints.get(DecodeHintType.TRY_HARDER);
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/*@SuppressWarnings("unchecked")*/
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const formats = hints === null || hints === undefined ? null : hints.get(DecodeHintType.POSSIBLE_FORMATS);
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const readers = new Array();
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if (formats !== null && formats !== undefined) {
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const addOneDReader = formats.some(f => f === BarcodeFormat.UPC_A ||
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f === BarcodeFormat.UPC_E ||
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f === BarcodeFormat.EAN_13 ||
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f === BarcodeFormat.EAN_8 ||
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f === BarcodeFormat.CODABAR ||
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f === BarcodeFormat.CODE_39 ||
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f === BarcodeFormat.CODE_93 ||
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f === BarcodeFormat.CODE_128 ||
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f === BarcodeFormat.ITF ||
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f === BarcodeFormat.RSS_14 ||
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f === BarcodeFormat.RSS_EXPANDED);
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// Put 1D readers upfront in "normal" mode
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// TYPESCRIPTPORT: TODO: uncomment below as they are ported
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if (addOneDReader && !tryHarder) {
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readers.push(new MultiFormatOneDReader(hints));
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}
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if (formats.includes(BarcodeFormat.QR_CODE)) {
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readers.push(new QRCodeReader());
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}
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if (formats.includes(BarcodeFormat.DATA_MATRIX)) {
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readers.push(new DataMatrixReader());
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}
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if (formats.includes(BarcodeFormat.AZTEC)) {
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readers.push(new AztecReader());
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}
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if (formats.includes(BarcodeFormat.PDF_417)) {
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readers.push(new PDF417Reader());
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}
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// if (formats.includes(BarcodeFormat.MAXICODE)) {
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// readers.push(new MaxiCodeReader())
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// }
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// At end in "try harder" mode
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if (addOneDReader && tryHarder) {
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readers.push(new MultiFormatOneDReader(hints));
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}
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}
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if (readers.length === 0) {
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if (!tryHarder) {
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readers.push(new MultiFormatOneDReader(hints));
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}
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readers.push(new QRCodeReader());
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readers.push(new DataMatrixReader());
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readers.push(new AztecReader());
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readers.push(new PDF417Reader());
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// readers.push(new MaxiCodeReader())
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if (tryHarder) {
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readers.push(new MultiFormatOneDReader(hints));
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}
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}
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this.readers = readers; // .toArray(new Reader[readers.size()])
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}
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/*@Override*/
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reset() {
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if (this.readers !== null) {
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for (const reader of this.readers) {
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reader.reset();
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}
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}
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}
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/**
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* @throws NotFoundException
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*/
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decodeInternal(image) {
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if (this.readers === null) {
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throw new ReaderException('No readers where selected, nothing can be read.');
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}
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for (const reader of this.readers) {
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// Trying to decode with ${reader} reader.
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try {
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return reader.decode(image, this.hints);
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}
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catch (ex) {
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if (ex instanceof ReaderException) {
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continue;
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}
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// Bad Exception.
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}
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}
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throw new NotFoundException('No MultiFormat Readers were able to detect the code.');
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}
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}
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