Unity结合ZXing生成中间带图标的二维码并保存

1、环境

Win10
Unity3d 2017.1.0f3
ZXing.Net ZXing.Net.0.16.0.0
下载：http://zxingnet.codeplex.com/

2、效果截图

3、代码

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

public class Demo : MonoBehaviour {

    public RawImage img1;
    public RawImage img2;
    public RawImage img3;
    public Texture2D icon;

    // Use this for initialization
    void Start ()
    {
        GenerateQRImage1("Hello Wrold!", 256, 256);
        GenerateQRImage2("I Love You!", 256, 256);
        GenerateQRImage3("中间带图片的二维码图片", 256, 256, icon);
    }

    /// 

    /// 生成2维码 方法一
    /// 经测试：只能生成256x256的
    /// 
    /// 
    /// 
    /// 
    void GenerateQRImage1(string content, int width, int height)
    {
        // 编码成color32
        EncodingOptions options = null;
        BarcodeWriter writer = new BarcodeWriter();
        options = new EncodingOptions
        {
            Width = width,
            Height = height,
            Margin = 1,
        };
        options.Hints.Add(EncodeHintType.CHARACTER_SET, "UTF-8");
        writer.Format = BarcodeFormat.QR_CODE;
        writer.Options = options;
        Color32[] colors = writer.Write(content);

        // 转成texture2d
        Texture2D texture = new Texture2D(width, height);
        texture.SetPixels32(colors);
        texture.Apply();
        img1.texture = texture;
        //// 存储成文件
        //byte[] bytes = texture.EncodeToPNG();
        //string path = System.IO.Path.Combine(Application.dataPath, "qr.png");
        //System.IO.File.WriteAllBytes(path, bytes);
    }

    /// 

    /// 生成2维码 方法二
    /// 经测试：能生成任意尺寸的正方形
    /// 
    /// 
    /// 
    /// 
    void GenerateQRImage2(string content, int width, int height)
    {
        // 编码成color32
        MultiFormatWriter writer = new MultiFormatWriter();
        Dictionaryobject> hints = new Dictionaryobject>();
        hints.Add(EncodeHintType.CHARACTER_SET, "UTF-8");
        hints.Add(EncodeHintType.MARGIN, 1);
        hints.Add(EncodeHintType.ERROR_CORRECTION, ZXing.QrCode.Internal.ErrorCorrectionLevel.M);
        BitMatrix bitMatrix = writer.encode(content, BarcodeFormat.QR_CODE, width, height, hints);

        // 转成texture2d
        int w = bitMatrix.Width;
        int h = bitMatrix.Height;
        print(string.Format("w={0},h={1}", w, h));
        Texture2D texture = new Texture2D(w, h);
        for (int x=0; xfor(int y=0; yif(bitMatrix[x,y])
                {
                    texture.SetPixel(y, x, Color.red);
                }
                else
                {
                    texture.SetPixel(y, x, Color.white);
                }
            }
        }
        texture.Apply();
        img2.texture = texture;
        //// 存储成文件
        //byte[] bytes = texture.EncodeToPNG();
        //string path = System.IO.Path.Combine(Application.dataPath, "qr.png");
        //System.IO.File.WriteAllBytes(path, bytes);
    }

    /// 

    /// 生成2维码 方法三
    /// 在方法二的基础上，添加小图标
    /// 
    /// 
    /// 
    /// 
    void GenerateQRImage3(string content, int width, int height, Texture2D centerIcon)
    {
        // 编码成color32
        MultiFormatWriter writer = new MultiFormatWriter();
        Dictionaryobject> hints = new Dictionaryobject>();
        hints.Add(EncodeHintType.CHARACTER_SET, "UTF-8");
        hints.Add(EncodeHintType.MARGIN, 1);
        hints.Add(EncodeHintType.ERROR_CORRECTION, ZXing.QrCode.Internal.ErrorCorrectionLevel.H);
        BitMatrix bitMatrix = writer.encode(content, BarcodeFormat.QR_CODE, width, height, hints);

        // 转成texture2d
        int w = bitMatrix.Width;
        int h = bitMatrix.Height;
        Texture2D texture = new Texture2D(w, h);
        for (int x = 0; x < h; x++)
        {
            for (int y = 0; y < w; y++)
            {
                if (bitMatrix[x, y])
                {
                    texture.SetPixel(y, x, Color.blue);
                }
                else
                {
                    texture.SetPixel(y, x, Color.white);
                }
            }
        }
        // 添加小图
        int halfWidth = texture.width / 2;
        int halfHeight = texture.height / 2;
        int halfWidthOfIcon = centerIcon.width / 2;
        int halfHeightOfIcon = centerIcon.height / 2;
        int centerOffsetX = 0;
        int centerOffsetY = 0;
        for (int x = 0; x < h; x++)
        {
            for (int y = 0; y < w; y++)
            {
                centerOffsetX = x - halfWidth;
                centerOffsetY = y - halfHeight;
                if(Mathf.Abs(centerOffsetX) <= halfWidthOfIcon && Mathf.Abs(centerOffsetY) <= halfHeightOfIcon)
                {
                    texture.SetPixel(x, y, centerIcon.GetPixel(centerOffsetX + halfWidthOfIcon, centerOffsetY + halfHeightOfIcon));
                }
            }
        }
        texture.Apply();
        img3.texture = texture;
        // 存储成文件
        byte[] bytes = texture.EncodeToPNG();
        string path = System.IO.Path.Combine(Application.dataPath, "qr.png");
        System.IO.File.WriteAllBytes(path, bytes);
    }

}