namespace CameraBarCode
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        public string GetStringZimg(Bitmap img)
        {
            string res = "";
            MemoryStream ms = new MemoryStream();
            img.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);
            byte[] bt = ms.GetBuffer();
            ms.Close();
            LuminanceSource source = new RGBLuminanceSource(bt, img.Width, img.Height);
            BinaryBitmap bitmap = new BinaryBitmap(new ZXing.Common.HybridBinarizer(source));
            Result result=null;
            try
            {
                //开始解码
                result = new MultiFormatReader().decode(bitmap);
            }
            catch (ReaderException re)
            {
                return res;
            }
            if (result != null) {
                res = result.ToString();
            }
            return res;
        }
        private void button1_Click(object sender, EventArgs e)
        {
            // 定义图像捕捉方式 从摄像头 ， 注意 Windows下需要选择 VideoCaptureAPIs.DSHOW
            var capture = new VideoCapture(0, VideoCaptureAPIs.DSHOW);
            if (!capture.IsOpened())
                return;
            capture.XI_OffsetX = 0; // 以左上角为起点 坐标X
            capture.XI_OffsetY = 0; // 以左上角为起点 坐标Y
            capture.FrameWidth = 1000; // 宽
            capture.FrameHeight = 1000; // 高
            capture.AutoFocus = true;
            const int sleepTime = 10;
            //var window = new Window("cv");
            // Mat作为图像的存储容器
            var image = new Mat();
            while (true)
            {
                capture.Read(image);
                if (image.Empty())
                    break;
                // 显示
                //window.ShowImage(image);
                // Windows窗体PictureBox加载
                Bitmap img = image.ToBitmap();
                pictureBox1.Image = img;
                 
                string txt = GetStringZimg(img);
                if (txt.Length>0)
                {
                    BarCodeString.Text = txt;
                    capture.Dispose();
                    break;
                }
                int flag = Cv2.WaitKey(sleepTime);
                if (flag >= 0)
                {
                    break;
                }
                // 可以防止界面停止响应
                Application.DoEvents();
            }
        }
        
    }
}