org.dromara.hutool.extra.qrcode.QrImage Maven / Gradle / Ivy
/*
* Copyright (c) 2013-2024 Hutool Team and hutool.cn
*
* 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 org.dromara.hutool.extra.qrcode;
import org.dromara.hutool.swing.img.Img;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.common.BitMatrix;
import java.awt.Image;
import java.awt.Rectangle;
import java.awt.image.BufferedImage;
/**
* 二维码图片封装
*
* @author looly
* @since 6.0.0
*/
public class QrImage extends BufferedImage {
/**
* 构造
*
* @param content 文本内容
* @param config {@link QrConfig} 二维码配置，包括宽度、高度、边距、颜色、格式等
*/
public QrImage(final String content, final QrConfig config) {
this(QrCodeUtil.encode(content, config), config);
}
/**
* 构造
*
* @param matrix {@link BitMatrix}
* @param config {@link QrConfig}，非空
*/
public QrImage(final BitMatrix matrix, final QrConfig config) {
super(matrix.getWidth(), matrix.getHeight(), null == config.backColor ? BufferedImage.TYPE_INT_ARGB : BufferedImage.TYPE_INT_RGB);
init(matrix, config);
}
/**
* 初始化
*
* @param matrix {@link BitMatrix}
* @param config {@link QrConfig}
*/
private void init(final BitMatrix matrix, final QrConfig config) {
final int width = matrix.getWidth();
final int height = matrix.getHeight();
final Integer foreColor = config.foreColor;
final Integer backColor = config.backColor;
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
if (matrix.get(x, y)) {
setRGB(x, y, foreColor);
} else if (null != backColor) {
setRGB(x, y, backColor);
}
}
}
final Image logoImg = config.img;
if (null != logoImg && BarcodeFormat.QR_CODE == config.format) {
// 只有二维码可以贴图
final int qrWidth = getWidth();
final int qrHeight = getHeight();
final int imgWidth;
final int imgHeight;
// 按照最短的边做比例缩放
if (qrWidth < qrHeight) {
imgWidth = qrWidth / config.ratio;
imgHeight = logoImg.getHeight(null) * imgWidth / logoImg.getWidth(null);
} else {
imgHeight = qrHeight / config.ratio;
imgWidth = logoImg.getWidth(null) * imgHeight / logoImg.getHeight(null);
}
// 原图片上直接绘制水印
Img.from(this).pressImage(//
Img.from(logoImg).round(config.imgRound).getImg(), // 圆角
new Rectangle(imgWidth, imgHeight), // 位置
1//不透明
);
}
}
}