/// <summary>
/// This method detects a code in a "pure" image -- that is, pure monochrome image
/// which contains only an unrotated, unskewed, image of a code, with some white border
/// around it. This is a specialized method that works exceptionally fast in this special
/// case.
///
/// @see com.google.zxing.pdf417.PDF417Reader#extractPureBits(BitMatrix)
/// @see com.google.zxing.datamatrix.DataMatrixReader#extractPureBits(BitMatrix)
/// @see com.google.zxing.qrcode.QRCodeReader#extractPureBits(BitMatrix)
/// </summary>
private static BitMatrix extractPureBits(BitMatrix image)
{
int[] enclosingRectangle = image.getEnclosingRectangle();
if (enclosingRectangle == null)
{
return null;
}
int left = enclosingRectangle[0];
int top = enclosingRectangle[1];
int width = enclosingRectangle[2];
int height = enclosingRectangle[3];
// Now just read off the bits
BitMatrix bits = new BitMatrix(MATRIX_WIDTH, MATRIX_HEIGHT);
for (int y = 0; y < MATRIX_HEIGHT; y++)
{
int iy = top + (y * height + height / 2) / MATRIX_HEIGHT;
for (int x = 0; x < MATRIX_WIDTH; x++)
{
int ix = left + (x * width + width / 2 + (y & 0x01) * width / 2) / MATRIX_WIDTH;
if (image[ix, iy])
{
bits[x, y] = true;
}
}
}
return bits;
}
/// <summary>
/// 生成带Logo的二维码
/// </summary>
/// <param name="text">文本内容</param>
public static void Generate(string text, string LogoPth, string serverPth, string filename, ImgType type, /* ImageFormat imgFrt,*/ int?width = null, int?hight = null)
{
try
{
//Logo 图片
Bitmap logo = new Bitmap(LogoPth);
//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);
int w = 300;
int h = 300;
if (width != null)
{
w = (int)width;
}
if (hight != null)
{
h = (int)hight;
}
//生成二维码
ZXing.Common.BitMatrix bm = writer.encode(text, BarcodeFormat.QR_CODE, w, h, hint);
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);
}
//将二维码插入图片
Graphics myGraphic = Graphics.FromImage(bmpimg);
//白底
myGraphic.FillRectangle(Brushes.White, middleL, middleT, middleW, middleH);
myGraphic.DrawImage(logo, middleL, middleT, middleW, middleH);
string suffix = ImgSuffix.Getsuffix(type);; //后缀
if (!Directory.Exists(serverPth))
{
Directory.CreateDirectory(serverPth);
}
//保存成图片
bmpimg.Save($"{serverPth}{filename}{suffix}");
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
