在 libjpeg c++ 中导出 jpeg 文件时的垂直线

问：

我不明白为什么当我导出为 jpeg 时，我每 1080 像素就会得到一条垂直线。我做错了什么？

完整回购 -> https://github.com/ElPettego/swg_bg

垂直线示例 -> https://github.com/ElPettego/swg_bg/blob/master/swg_test.jpg

void export_jpg(std::vector<std::vector<int>> grid) {
    struct jpeg_compress_struct cinfo;
    struct jpeg_error_mgr jerr;

    cinfo.err = jpeg_std_error(&jerr);    

    FILE* outfile = fopen("swg_test.jpg", "wb");
    if (!outfile) {
        exit(1);
    }
    
    jpeg_create_compress(&cinfo);
    jpeg_stdio_dest(&cinfo, outfile);

    cinfo.image_width = width;
    cinfo.image_height = height;
    cinfo.input_components = 3;
    cinfo.in_color_space = JCS_RGB;

    jpeg_set_defaults(&cinfo);
    jpeg_set_quality(&cinfo, 100, TRUE);

    jpeg_start_compress(&cinfo, TRUE);

    while (cinfo.next_scanline < cinfo.image_height) {
        JSAMPROW row_buffer = new JSAMPLE[cinfo.image_width * 3];

        for (int x = 0; x < width; x++) {
            row_buffer[x * 3] = 0;
            row_buffer[x * 3 + 2] = 0;
            row_buffer[x * 3 + 1] =  grid[cinfo.next_scanline][x] ? 255 : 0;

        }
        jpeg_write_scanlines(&cinfo, &row_buffer, 1);
        delete[] row_buffer;
    }
    jpeg_finish_compress(&cinfo);
    fclose(outfile);
    jpeg_destroy_compress(&cinfo);
}

我尝试修改new_generation函数中for循环的边界和导出质量，但错误仍然存在（https://github.com/ElPettego/swg_bg/blob/master/main.c%2B%2B)