/// <summary>
/// 生成图片
/// </summary>
/// <param name="content"></param>
/// <param name="width"></param>
/// <param name="height"></param>
/// <param name="centralImage"></param>
/// <param name="format"></param>
/// <returns></returns>
public static Bitmap Create(string content, int width, int height, Image centralImage = null, zxingBarcodeFormat format = zxingBarcodeFormat.QR_CODE)
{
BarcodeFormat codeformat = BarcodeFormat.QR_CODE;
switch (format)
{
case zxingBarcodeFormat.QR_CODE:
codeformat = BarcodeFormat.QR_CODE;
break;
case zxingBarcodeFormat.CODE_128:
codeformat = BarcodeFormat.CODE_128;
break;
}
//构造二维码写码器
MultiFormatWriter mutiWriter = new MultiFormatWriter();
IDictionary <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 = mutiWriter.encode(content, codeformat, width, height, hint);
BarcodeWriterPixelData bw = new BarcodeWriterPixelData
{
Format = BarcodeFormat.QR_CODE,
Options = new QrCodeEncodingOptions
{
Height = width,
Width = height,
Margin = 0
}
};
var piexlData = bw.Write(bm);
Bitmap img = new Bitmap(piexlData.Width, piexlData.Height, System.Drawing.Imaging.PixelFormat.Format32bppRgb);
var ms = new MemoryStream();
var bitmapData = img.LockBits(new System.Drawing.Rectangle(0, 0, piexlData.Width, piexlData.Height),
System.Drawing.Imaging.ImageLockMode.WriteOnly, System.Drawing.Imaging.PixelFormat.Format32bppRgb);
try
{
// we assume that the row stride of the bitmap is aligned to 4 byte multiplied by the width of the image
System.Runtime.InteropServices.Marshal.Copy(piexlData.Pixels, 0, bitmapData.Scan0,
piexlData.Pixels.Length);
}
finally
{
img.UnlockBits(bitmapData);
}
Bitmap result = img;
if (centralImage != null)
{
//要插入到二维码中的图片
Image middlImg = centralImage;
//获取二维码实际尺寸（去掉二维码两边空白后的实际尺寸）
// System.Drawing.Size realSize = mutiWriter.GetEncodeSize(content, com.google.zxing.BarcodeFormat.QR_CODE, 300, 300);
var realSize = mutiWriter.encode(content, codeformat, width, height);
//计算插入图片的大小和位置
int middleImgW = Math.Min((int)(realSize.Width / 3.5), middlImg.Width);
int middleImgH = Math.Min((int)(realSize.Height / 3.5), middlImg.Height);
int middleImgL = (img.Width - middleImgW) / 2;
int middleImgT = (img.Height - middleImgH) / 2;
//将img转换成bmp格式，否则后面无法创建 Graphics对象
result = new Bitmap(img.Width, img.Height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
using (Graphics g = Graphics.FromImage(result))
{
g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
g.DrawImage(img, 0, 0);
}
//在二维码中插入图片
System.Drawing.Graphics MyGraphic = System.Drawing.Graphics.FromImage(result);
//白底
MyGraphic.FillRectangle(Brushes.White, middleImgL, middleImgT, middleImgW, middleImgH);
MyGraphic.DrawImage(middlImg, middleImgL, middleImgT, middleImgW, middleImgH);
}
return(result);
}
/// <summary>
/// 生成图形码
/// </summary>
/// <param name="content"></param>
/// <param name="format"></param>
/// <returns></returns>
public static Bitmap Create(string content, zxingBarcodeFormat format = zxingBarcodeFormat.QR_CODE)
{
return(Create(content, 300, 300, format: format));
}
