881ba4e7ee
The QrCode Scanner is for Wifi DPP feature. Bug: 118797380 Test: RunSettingsRoboTests Change-Id: I962d069a8c2bce78c00ac8ce9e8ebf176e75873c
76 lines
2.3 KiB
Java
76 lines
2.3 KiB
Java
/*
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* Copyright (C) 2018 The Android Open Source Project
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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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package com.android.settings.wifi.qrcode;
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import com.google.zxing.LuminanceSource;
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/**
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* This helper class implements crop method to crop preview picture.
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*/
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public class QrYuvLuminanceSource extends LuminanceSource {
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private byte[] mYuvData;
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private int mWidth;
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private int mHeight;
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public QrYuvLuminanceSource(byte[] yuvData, int width, int height) {
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super(width, height);
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mWidth = width;
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mHeight = height;
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mYuvData = yuvData;
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}
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@Override
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public boolean isCropSupported() {
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return true;
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}
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@Override
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public LuminanceSource crop(int left, int top, int crop_width, int crop_height) {
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final byte[] newImage = new byte[crop_width * crop_height];
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int inputOffset = top * mWidth + left;
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if (left + crop_width > mWidth || top + crop_height > mHeight) {
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throw new IllegalArgumentException("cropped rectangle does not fit within image data.");
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}
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for (int y = 0; y < crop_height; y++) {
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System.arraycopy(mYuvData, inputOffset, newImage, y * crop_width, crop_width);
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inputOffset += mWidth;
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}
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return new QrYuvLuminanceSource(newImage, crop_width, crop_height);
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}
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@Override
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public byte[] getRow(int y, byte[] row) {
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if (y < 0 || y >= mHeight) {
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throw new IllegalArgumentException("Requested row is outside the image: " + y);
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}
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if (row == null || row.length < mWidth) {
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row = new byte[mWidth];
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}
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System.arraycopy(mYuvData, y * mWidth, row, 0, mWidth);
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return row;
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}
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@Override
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public byte[] getMatrix() {
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return mYuvData;
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}
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}
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