package com.hdl.sdk.sourceos.qrcode;

import android.graphics.Bitmap;
import android.text.TextUtils;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

import java.util.HashMap;
import java.util.Map;

/**
 * Created by Tong on 2021/11/8.
 * 二维码
 */
public class QRCodeUtils {


    /**
     * 生成二维码
     */
    public static Bitmap createQRCode(String txt, int width, int height, int margin) throws WriterException {
        Bitmap bitmap = Bitmap.createBitmap(width, height,
                Bitmap.Config.ARGB_8888);
        createQRCode(bitmap, txt, width, height, margin);
        return bitmap;
    }


    /**
     * 生成二维码
     */
    public static void createQRCode(Bitmap bitmap, String txt, int width, int height, int margin) throws WriterException {

        if (TextUtils.isEmpty(txt)) {
            return;
        }

        Map<EncodeHintType, Object> hints = new HashMap<>();
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
        if (margin >= 0) {
            hints.put(EncodeHintType.MARGIN, margin);
        }


        // 生成二维矩阵
        BitMatrix matrix = new MultiFormatWriter().encode(txt,
                BarcodeFormat.QR_CODE, width, height, hints);

        // 二维矩阵转为一维像素数组,也就是一直横着排了
        int[] pixels = new int[width * height];
        for (int y = 0; y < height; y++) {
            for (int x = 0; x < width; x++) {
                if (matrix.get(x, y)) {
                    pixels[y * width + x] = 0xff000000;
                } else {
                    pixels[y * width + x] = 0xffffffff;
                }
            }
        }

        bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
    }


}