/*
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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 LuminanceSource from './LuminanceSource';
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/*namespace com.google.zxing {*/
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/**
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* A wrapper implementation of {@link LuminanceSource} which inverts the luminances it returns -- black becomes
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* white and vice versa, and each value becomes (255-value).
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*
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* @author Sean Owen
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*/
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export default class InvertedLuminanceSource extends LuminanceSource {
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constructor(delegate) {
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super(delegate.getWidth(), delegate.getHeight());
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this.delegate = delegate;
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}
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/*@Override*/
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getRow(y /*int*/, row) {
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const sourceRow = this.delegate.getRow(y, row);
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const width = this.getWidth();
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for (let i = 0; i < width; i++) {
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sourceRow[i] = /*(byte)*/ (255 - (sourceRow[i] & 0xFF));
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}
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return sourceRow;
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}
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/*@Override*/
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getMatrix() {
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const matrix = this.delegate.getMatrix();
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const length = this.getWidth() * this.getHeight();
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const invertedMatrix = new Uint8ClampedArray(length);
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for (let i = 0; i < length; i++) {
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invertedMatrix[i] = /*(byte)*/ (255 - (matrix[i] & 0xFF));
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}
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return invertedMatrix;
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}
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/*@Override*/
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isCropSupported() {
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return this.delegate.isCropSupported();
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}
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/*@Override*/
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crop(left /*int*/, top /*int*/, width /*int*/, height /*int*/) {
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return new InvertedLuminanceSource(this.delegate.crop(left, top, width, height));
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}
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/*@Override*/
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isRotateSupported() {
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return this.delegate.isRotateSupported();
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}
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/**
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* @return original delegate {@link LuminanceSource} since invert undoes itself
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*/
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/*@Override*/
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invert() {
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return this.delegate;
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}
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/*@Override*/
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rotateCounterClockwise() {
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return new InvertedLuminanceSource(this.delegate.rotateCounterClockwise());
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}
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/*@Override*/
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rotateCounterClockwise45() {
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return new InvertedLuminanceSource(this.delegate.rotateCounterClockwise45());
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}
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}
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