using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using ZXing;//引入ZXing,下载zxing.unity.dll
public class QRCode : MonoBehaviour {
public RawImage cameraTexture;
public RawImage QRCodeTexture;
private WebCamTexture webCamTexture;
private BarcodeReader barcodeReader;//识别二维码
private BarcodeWriter barcodeWriter;//生成二维码
private float interval = 0f;
private bool isStartS = false;//开始扫描二维码
private bool m_IsEditorSaveTexture = false; //这里保证上次svn的时候是false，否则每次都要生成新资源
private string QRTextureSavedPath;
private Color32[] data;//
void Start () {
barcodeReader = new BarcodeReader();
QRTextureSavedPath = Application.dataPath + "/QRCodeTexture"; //二维码保存路径，程序内
// QRTextureSavedPath = Application.persistentDataPath + "/QRCodeTexture";//二维码保存路径，沙盒
}
// Update is called once per frame
void Update () {
if (isStartS)
{
//每隔2秒调用一次，看一下有没有二维码,识别扫描二维码
interval += Time.deltaTime;
if (interval >= 2f)
{
ScanQRCode();//每隔3秒
interval = 0;
}
}
}
//开始扫描识别二维码
public void StartScanQRCode()
{
//开启摄像头
WebCamDevice[] devices = WebCamTexture.devices;
string deviceName = devices[0].name;
webCamTexture = new WebCamTexture(deviceName, 400, 300);
cameraTexture.texture = webCamTexture;
webCamTexture.Play();
isStartS = true;
}
//开始创建一个二维码
public void StartCreateQRCode()
{
ShowQRCode("非子萧", 256, 256);//显示二维码的大小
// QRCodeTexture.texture = CreateQRCodeTexture("xx", 512, 512,true);//任意大小，创建并保存二维码，但不支持中文？？？
}
//扫描二维码
void ScanQRCode()
{
data = webCamTexture.GetPixels32();
var result= barcodeReader.Decode(data,webCamTexture.width,webCamTexture.height);//识别，二维码
if (result!=null)
{
Debug.Log(result.Text);
}
}
//显示二维码
void ShowQRCode(string str,int width,int height)
{
Texture2D t = new Texture2D(width, height); //创建一个空纹理贴图
t.SetPixels32(CreateQRCode(str, width, height));//空图片的像素为创建的二维码
t.Apply();
//Debug.Log("创建一个空纹理贴图，贴图为二维码");
QRCodeTexture.texture = t;//
}
//创建二维码(只能生成256，256)返回 Color32[]格式 formatStr=二维码显示的内容
Color32[] CreateQRCode(string formatStr,int width,int height)
{
ZXing.QrCode.QrCodeEncodingOptions options = new ZXing.QrCode.QrCodeEncodingOptions();//二维码选项
options.CharacterSet = "UTF-8";//设置字符编码，否则中文不能显示
options.Width = width;//二微码宽
options.Height = width;//二微码高
options.Margin = 1;//二微码距离边缘的空白
barcodeWriter = new BarcodeWriter{ Format = BarcodeFormat.QR_CODE,Options=options};//创建二维码
// Debug.Log("创建二维码");
return barcodeWriter.Write(formatStr);
}
//创建二维码（任何大小）)返回 Color32[]格式 formatStr=二维码显示的内容
Color32[] CreateQRCode2(string textForEncoding, int width, int height)
{
//不能识别中文？？？？？？
ZXing.Common.BitMatrix matrix = new MultiFormatWriter().encode(textForEncoding,
BarcodeFormat.QR_CODE, width, height);
Color32[] pixels = new Color32[width * height];
//
// 下面这里按照二维码的算法，逐个生成二维码的图片，
// 两个for循环是图片横列扫描的结果
Color32 black = new Color32(255, 255, 255, 255);
Color32 white = new Color32(0, 0, 0, 255);
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
if (matrix[x, y])
{
pixels[y * width + x] = white;// 0xff000000;
}
else
{
pixels[y * width + x] = black;// 0xffffffff;
}
}
}
return pixels;
}
/// <summary>
/// 生成二维码纹理
/// </summary>
/// <param name="textForEncoding">二维码的内容</param>
/// <param name="width">二维码大宽</param>
/// <param name="height">二维码高</param>
/// <param name="issave">是否保存二维码</param>
/// <returns></returns>
public Texture2D CreateQRCodeTexture(string textForEncoding, int width, int height, bool issave = false)
{
if (width > 512 && height > 512)
{
//保存的二维码图片太大，消耗CPU性能
Debug.LogError("Do not save too big, it will consume cpu performance so much!! ");
}
string fullpath = QRTextureSavedPath + "/" + textForEncoding + ".png";
//Debug.LogError("fullpath: "+ fullpath);
//先判断文件夹下面有没有这个文件
Texture2D encoded = GetAlreadySavePng(fullpath, width, height);
if (encoded != null)
{
return encoded;
}
else //如果没有要重新创建并视issave保存
{
encoded = new Texture2D(width, height);
var color32 = CreateQRCode2(textForEncoding, width, height);
encoded.SetPixels32(color32);
encoded.Apply();
if (issave)//保存二维码图片
{
// if (!Application.isEditor || m_IsEditorSaveTexture)
{
var bytes = encoded.EncodeToPNG();//把二维码转成byte数组，然后进行输出保存为png图片就可以保存下来生成好的二维码
if (!System.IO.Directory.Exists(QRTextureSavedPath)) //创建生成目录，如果不存在则创建目录
{
Debug.Log("CreateDirectory: " + QRTextureSavedPath);
System.IO.Directory.CreateDirectory(QRTextureSavedPath);
}
System.IO.File.WriteAllBytes(fullpath, bytes);//保存二维码图片
UnityEditor.AssetDatabase.Refresh();//刷新，使刚创建的图片立刻导入。接下来才可以被使用
}
}
}
return encoded;
}
//取得保存生成的二维码图片
private Texture2D GetAlreadySavePng(string fullpath, int width, int height)
{
Texture2D ret = null;
byte[] bytes = null;
if (System.IO.File.Exists(fullpath))
{
bytes = System.IO.File.ReadAllBytes(fullpath);
if (bytes != null)
{
ret = new Texture2D(width, height);
ret.LoadImage(bytes, true);
}
}
return ret;
}
}
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