@zxing/library
Version:
TypeScript port of ZXing multi-format 1D/2D barcode image processing library.
91 lines (90 loc) • 4.11 kB
JavaScript
/*
* Copyright 2013 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.
*/
// package com.google.zxing.aztec;
// import com.google.zxing.BarcodeFormat;
import BarcodeFormat from '../BarcodeFormat';
// import com.google.zxing.EncodeHintType;
import EncodeHintType from '../EncodeHintType';
// import com.google.zxing.aztec.encoder.Encoder;
import Encoder from './encoder/Encoder';
// import com.google.zxing.common.BitMatrix;
import BitMatrix from '../common/BitMatrix';
// import java.nio.charset.Charset;
import Charset from '../util/Charset';
// import java.nio.charset.StandardCharsets;
import StandardCharsets from '../util/StandardCharsets';
// import java.util.Map;
import Integer from '../util/Integer';
import IllegalStateException from '../IllegalStateException';
import IllegalArgumentException from '../IllegalArgumentException';
import StringUtils from '../common/StringUtils';
/**
* Renders an Aztec code as a {@link BitMatrix}.
*/
export default /*public final*/ class AztecWriter {
// @Override
encode(contents, format, width, height) {
return this.encodeWithHints(contents, format, width, height, null);
}
// @Override
encodeWithHints(contents, format, width, height, hints) {
let charset = StandardCharsets.ISO_8859_1;
let eccPercent = Encoder.DEFAULT_EC_PERCENT;
let layers = Encoder.DEFAULT_AZTEC_LAYERS;
if (hints != null) {
if (hints.has(EncodeHintType.CHARACTER_SET)) {
charset = Charset.forName(hints.get(EncodeHintType.CHARACTER_SET).toString());
}
if (hints.has(EncodeHintType.ERROR_CORRECTION)) {
eccPercent = Integer.parseInt(hints.get(EncodeHintType.ERROR_CORRECTION).toString());
}
if (hints.has(EncodeHintType.AZTEC_LAYERS)) {
layers = Integer.parseInt(hints.get(EncodeHintType.AZTEC_LAYERS).toString());
}
}
return AztecWriter.encodeLayers(contents, format, width, height, charset, eccPercent, layers);
}
static encodeLayers(contents, format, width, height, charset, eccPercent, layers) {
if (format !== BarcodeFormat.AZTEC) {
throw new IllegalArgumentException('Can only encode AZTEC, but got ' + format);
}
let aztec = Encoder.encode(StringUtils.getBytes(contents, charset), eccPercent, layers);
return AztecWriter.renderResult(aztec, width, height);
}
static renderResult(code, width, height) {
let input = code.getMatrix();
if (input == null) {
throw new IllegalStateException();
}
let inputWidth = input.getWidth();
let inputHeight = input.getHeight();
let outputWidth = Math.max(width, inputWidth);
let outputHeight = Math.max(height, inputHeight);
let multiple = Math.min(outputWidth / inputWidth, outputHeight / inputHeight);
let leftPadding = (outputWidth - (inputWidth * multiple)) / 2;
let topPadding = (outputHeight - (inputHeight * multiple)) / 2;
let output = new BitMatrix(outputWidth, outputHeight);
for (let inputY /*int*/ = 0, outputY = topPadding; inputY < inputHeight; inputY++, outputY += multiple) {
// Write the contents of this row of the barcode
for (let inputX /*int*/ = 0, outputX = leftPadding; inputX < inputWidth; inputX++, outputX += multiple) {
if (input.get(inputX, inputY)) {
output.setRegion(outputX, outputY, multiple, multiple);
}
}
}
return output;
}
}