package com.ruoyi.common.core.utils.qrcode;

import com.google.zxing.common.BitMatrix;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;


public class MatrixToImageWriter {
	private static final int BLACK = 0xFF000000;//用于设置图案的颜色
    private static final int WHITE = 0xFFFFFFFF; //用于背景色

    private MatrixToImageWriter() {
    }

    public static BufferedImage toBufferedImage(BitMatrix matrix) {
        int width = matrix.getWidth();
        int height = matrix.getHeight();
        BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        for (int x = 0; x < width; x++) {
            for (int y = 0; y < height; y++) {
                image.setRGB(x, y,  (matrix.get(x, y) ? BLACK : WHITE));
//              image.setRGB(x, y,  (matrix.get(x, y) ? Color.YELLOW.getRGB() : Color.CYAN.getRGB()));
            }
        }
        return image;
    }

    public static void writeToFile(BitMatrix matrix, String format, File file,String logUri) throws IOException {
        System.out.println("write to file");
        BufferedImage image = toBufferedImage(matrix);
        if (!ImageIO.write(image, format, file)) {
            System.out.println("生成图片失败");
            throw new IOException("Could not write an image of format " + format + " to " + file);
        }else{
            System.out.println("图片生成成功！");
        }
    }

    public static void writeToStream(BitMatrix matrix, String format, OutputStream stream,String logUri) throws IOException {
        BufferedImage image = toBufferedImage(matrix);     
        if (!ImageIO.write(image, format, stream)) {
            throw new IOException("Could not write an image of format " + format);
        }
    }
}
