MudBarcode component Code128 invalid width and height settings

[Qiulin-Git]

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1. Code128 invalid width and height settings
2. I hope the QR code component can add logo images

[mckaragoz]

Do you have an example about logo images?

[Qiulin-Git]

Do you have an example about logo images?

Here is an example that can only run on Windows

public class BarcodeHelper
{


	/// <summary>
	/// 生成带Logo的二维码
	/// </summary>
	/// <param name="text">内容</param>
	/// <param name="logoPath">Logo 图片</param>
	/// <param name="width">宽度</param>
	/// <param name="height">高度</param>
	public static Bitmap CreateQRCodeWithLogo(string text, string logoPath, int width, int height)
	{

		Bitmap logo = new Bitmap(logoPath);
		//构造二维码写码器
		MultiFormatWriter writer = new MultiFormatWriter();
		Dictionary<EncodeHintType, object> hint = new Dictionary<EncodeHintType, object>();
		hint.Add(EncodeHintType.CHARACTER_SET, "UTF-8");
		hint.Add(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);


		//生成二维码
		BitMatrix bm = writer.encode(text, BarcodeFormat.QR_CODE, width , height , hint);
		bm = deleteWhite(bm);
		BarcodeWriter barcodeWriter = new BarcodeWriter();
		Bitmap map = barcodeWriter.Write(bm);

		//获取二维码实际尺寸（去掉二维码两边空白后的实际尺寸）
		int[] rectangle = bm.getEnclosingRectangle();

		//计算插入图片的大小和位置
		int middleW = Math.Min((int)(rectangle[2] / 3.5), logo.Width);
		int middleH = Math.Min((int)(rectangle[3] / 3.5), logo.Height);
		int middleL = (map.Width - middleW) / 2;
		int middleT = (map.Height - middleH) / 2;

		//将img转换成bmp格式,否则后面无法创建Graphics对象
		Bitmap bmpimg = new Bitmap(map.Width, map.Height, PixelFormat.Format32bppArgb);
		using (Graphics g = Graphics.FromImage(bmpimg))
		{
			g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
			g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
			g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
			g.DrawImage(map, 0, 0);
			//白底将二维码插入图片
			g.FillRectangle(Brushes.White, middleL, middleT, middleW, middleH);
			g.DrawImage(logo, middleL, middleT, middleW, middleH);
		}
		return bmpimg;
	}

	/// <summary>
	/// 删除默认对应的空白
	/// </summary>
	/// <param name="matrix"></param>
	/// <returns></returns>
	private static BitMatrix deleteWhite(BitMatrix matrix)
	{
		int[] rec = matrix.getEnclosingRectangle();
		int resWidth = rec[2] + 1;
		int resHeight = rec[3] + 1;

		BitMatrix resMatrix = new BitMatrix(resWidth, resHeight);
		resMatrix.clear();
		for (int i = 0; i < resWidth; i++)
		{
			for (int j = 0; j < resHeight; j++)
			{
				if (matrix[i + rec[0], j + rec[1]])
					resMatrix[i, j] = true;
			}
		}
		return resMatrix;
	}




	



}