QR Code Creator EditorWindow

CreateQRCodeWindow.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEditor;
using System.IO;

/// <summary>
/// QRコード作成EditorWindow
/// </summary>
public class CreateQRCodeWindow : EditorWindow
{
	public enum QRImageSize
	{
		SIZE_128 = 7,
		SIZE_256,
		SIZE_512,
		SIZE_1024,
		SIZE_2048,
		SIZE_4096
	}

	[MenuItem ("Window/QR")]
	static void Init ()
	{
		var w = EditorWindow.GetWindow<CreateQRCodeWindow> ();
		w.Show ();
	}

	QRImageSize _size = QRImageSize.SIZE_256;
	string _content = "";

	void OnGUI ()
	{
		string savePath = Application.dataPath + "/qr.png";
		_content = GUILayout.TextArea (_content, GUILayout.Height (30f));
		_size = (QRImageSize)EditorGUILayout.EnumPopup (_size);
		EditorGUI.BeginDisabledGroup (string.IsNullOrEmpty (_content));
		if (GUILayout.Button ("Save")) {
			int size = (int)Mathf.Pow (2f, (int)_size);
			var tex = QRCodeHelper.CreateQRCode (_content, size, size);
			using (var fs = new FileStream (savePath, FileMode.OpenOrCreate)) {
				var b = tex.EncodeToPNG ();
				fs.Write (b, 0, b.Length);
			}
			AssetDatabase.Refresh ();
		}
		EditorGUI.EndDisabledGroup ();
	}
}

QRCodeHelper.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using ZXing;
using ZXing.QrCode;

/// <summary>
/// QRコードの作成と読み込みヘルパークラス
/// </summary>
public class QRCodeHelper
{
	static public string Read (Texture2D tex)
	{
		BarcodeReader reader = new BarcodeReader ();
		int w = tex.width;
		int h = tex.height;
		var pixel32s = tex.GetPixels32 ();
		var r = reader.Decode (pixel32s, w, h);
		return r.Text;
	}

	static public string Read (WebCamTexture tex)
	{
		BarcodeReader reader = new BarcodeReader ();
		int w = tex.width;
		int h = tex.height;
		var pixel32s = tex.GetPixels32 ();
		var r = reader.Decode (pixel32s, w, h);
		if (r != null)
			return r.Text;
		else
			return "error";
	}

	static public Texture2D CreateQRCode (string str, int w, int h)
	{
		var tex = new Texture2D (w, h, TextureFormat.ARGB32, false);
		var content = Write (str, w, h);
		tex.SetPixels32 (content);
		tex.Apply ();
		return tex;
	}

	static Color32[] Write (string content, int w, int h)
	{
		Debug.Log (content + " / " + w + " / " + h);
	
		var writer = new BarcodeWriter {
			Format = BarcodeFormat.QR_CODE,
			Options = new QrCodeEncodingOptions {
				Width = w, Height = h
			}
		};
		return writer.Write (content);
	}
}

SampleQRReader.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class SampleQRReader : MonoBehaviour
{
	string _result = null;
	WebCamTexture _webCam;
	bool _isInit;

	IEnumerator Start ()
	{
		yield return Application.RequestUserAuthorization (UserAuthorization.WebCam);
		if (Application.HasUserAuthorization (UserAuthorization.WebCam) == false) {
			yield break;
		}
		WebCamDevice[] devices = WebCamTexture.devices;
		if (devices == null || devices.Length == 0)
			yield break;
		_webCam = new WebCamTexture (devices [0].name, Screen.width, Screen.height, 12);
		_webCam.Play ();
	}

	void Update ()
	{
		if (_webCam != null) {
			_result = QRCodeHelper.Read (_webCam);
		}
		CheckDebugMode ();
	}

	void OnGUI ()
	{
		isDebug = GUILayout.Toggle (isDebug, "DEBUGモード", GUILayout.Height (50f));
		GUILayout.Label (_result, GUILayout.Width (300f), GUILayout.Height (200f));
	}

	#region Debug

	public bool isDebug;
	bool _isDebugMode;

	void CheckDebugMode ()
	{
		if (_isDebugMode != isDebug) {
			_isDebugMode = isDebug;
			if (_isDebugMode)
				ShowDebugView ();
			else
				HideDebugView ();
		}
	}

	/// <summary>
	/// 画面右上にWebCamを表示させる
	/// </summary>
	void ShowDebugView ()
	{
		var debugCanvasObj = new GameObject ("DebugQR");
		var debugRawObj = new GameObject ("Raw");
		debugRawObj.transform.SetParent (debugCanvasObj.transform, false);
		var rawImage = debugRawObj.AddComponent<RawImage> ();
		var c = debugCanvasObj.AddComponent<Canvas> ();
		c.renderMode = RenderMode.ScreenSpaceOverlay;
		rawImage.texture = _webCam;
		float w = 200f;
		float h = w * Screen.width / Screen.height;
		rawImage.rectTransform.sizeDelta = new Vector2 (w, h);
		rawImage.rectTransform.anchorMax = new Vector2 (1f, 1f);
		rawImage.rectTransform.anchorMin = new Vector2 (1f, 1f);
		rawImage.rectTransform.anchoredPosition = new Vector2 (-w * 0.5f, -h * 0.5f);
	}

	void HideDebugView ()
	{
		Destroy (GameObject.Find ("DebugQR"));
	}

	#endregion
}