public static byte[] GeneratePngBytes(string text, int width, int height)
{
var hints = new Dictionary<EncodeHintType, object>
{
[EncodeHintType.MARGIN] = 0
};
var qr = new QRCodeWriter();
var matrix = qr.encode(text, BarcodeFormat.QR_CODE, width, height, hints);
var writer = new BarcodeWriter {Options = {Margin = 0}};
using (var bitmap = writer.Write(matrix))
{
bitmap.MakeTransparent(Color.White);
var ms = new MemoryStream();
bitmap.Save(ms, ImageFormat.Png);
return ms.ToArray();
}
}
public BitMatrix GetQR(string message)
{
QRCodeWriter qrCode = new QRCodeWriter();
BitMatrix imgBitmap = qrCode.encode(message, ZXing.BarcodeFormat.QR_CODE, 350, 350);
return imgBitmap;
}
public async static Task<Uri> ToQrDataUri(this ISdp sdp, int width, int height)
{
var qrCodeWriter = new QRCodeWriter();
var bitMatrix = qrCodeWriter.encode(sdp.ToString(), ZXing.BarcodeFormat.QR_CODE, width, height);
using (var canvasRenderTarget = new CanvasRenderTarget(CanvasDevice.GetSharedDevice(), 500, 500, 96))
{
using (var drawingSession = canvasRenderTarget.CreateDrawingSession())
{
for (var y = 0; y < height; y++)
{
for (var x = 0; x < width; x++)
{
drawingSession.DrawRectangle(x, y, 1, 1, bitMatrix.get(x, y) ? Color.FromArgb(0, 0, 0, 0) : Color.FromArgb(255, 255, 255, 255));
}
}
}
using (var inMemoryRandomAccessStream = new InMemoryRandomAccessStream())
{
await canvasRenderTarget.SaveAsync(inMemoryRandomAccessStream, CanvasBitmapFileFormat.Png);
inMemoryRandomAccessStream.Seek(0);
var buffer = new byte[inMemoryRandomAccessStream.Size];
await inMemoryRandomAccessStream.ReadAsync(buffer.AsBuffer(), (uint)inMemoryRandomAccessStream.Size, InputStreamOptions.None);
return new Uri($"data:image/png;base64,{Convert.ToBase64String(buffer)}");
}
}
}
public void CreateCode(string code)
{
int QRwidth = 256; // 圖形寬
int QRheight = 256; //圖形高
QRCodeWriter writer=new QRCodeWriter();
BitMatrix bm = writer.encode(code, BarcodeFormat.QR_CODE, QRwidth, QRheight);
Texture2D t2d=new Texture2D(QRwidth,QRheight);
r.material.mainTexture=t2d;
int width = bm.Width;
int height = bm.Height;
for (int x = 0; x < width; x++)
{
for (int y = 0; y < height; y++)
{
//bm.get_Renamed(x, y) != -1 ? ColorTranslator.FromHtml("Red") : ColorTranslator.FromHtml("Yellow");
if(bm[x, y]){
t2d.SetPixel(x, y,Color.black);
}else{
t2d.SetPixel(x, y,Color.white);
}
}
}
t2d.Apply();
}
/// <summary>
/// Trả về file name (path) của ảnh tạo ra bởi ZXing library (temp file)
/// </summary>
/// <param name="Text">Văn bản cần sinh mã QR</param>
/// <param name="ImageSize">Kích thước của ảnh QR. Tối đa là 500 px</param>
/// <param name="Correction">Mức độ chịu lỗi</param>
/// <param name="Margin">Số điểm ảnh trắng để làm biên </param>
/// <returns></returns>
static string GetQRCodeLocalFileNameByZXing(string Text, int ImageSize = 500, CorrectionLevel Correction = CorrectionLevel.High, int Margin = 0)
{
QRCodeWriter qr = new ZXing.QrCode.QRCodeWriter(); //QRCode as a BitMatrix 2D array
Dictionary <EncodeHintType, object> hint = new Dictionary <EncodeHintType, object>();
hint.Add(EncodeHintType.MARGIN, Margin); // margin of the QRCode image
hint.Add(EncodeHintType.ERROR_CORRECTION, Correction);
var matrix = qr.encode(Text, BarcodeFormat.QR_CODE, ImageSize, ImageSize, hint); // encode QRCode matrix from source text
ZXing.BarcodeWriter w = new ZXing.BarcodeWriter();
Bitmap img = w.Write(matrix); // QRCode Bitmap image
string tempFile = Path.GetTempFileName(); //create a temp file to save QRCode image
img.Save(tempFile, System.Drawing.Imaging.ImageFormat.Png); //save QRCode image to temp file
//old one - use clipboard
//MemoryStream ms = new MemoryStream();
//img.Save(ms, System.Drawing.Imaging.ImageFormat.Png); //save QRCode image to memory stream
//System.Drawing.Image i = System.Drawing.Image.FromStream(ms); // create image in Image form
//Clipboard.SetDataObject(i);// set image to clipboard
return(tempFile);
}
public static Android.Graphics.Bitmap Create(string hostName, int port, string connectionPassword)
{
StringBuilder qrString = new StringBuilder(DataSchemeWithSuffix);
qrString.Append(hostName);
qrString.Append("/");
qrString.Append(port);
qrString.Append("/");
qrString.Append(connectionPassword);
BitMatrix qrMatrix = new QRCodeWriter().encode(qrString.ToString(), ZXing.BarcodeFormat.QR_CODE, 800, 800);
return new BitmapRenderer().Render(qrMatrix, ZXing.BarcodeFormat.QR_CODE, string.Empty);
}
/// <summary>
/// Trả về file name (path) của ảnh tạo ra bởi ZXing library (temp file)
/// </summary>
/// <param name="Text">Văn bản cần sinh mã QR</param>
/// <param name="ImageSize">Kích thước của ảnh QR. Tối đa là 500 px</param>
/// <param name="Correction">Mức độ chịu lỗi</param>
/// <param name="Margin">Số điểm ảnh trắng để làm biên </param>
/// <returns></returns>
static string GetQRCodeLocalFileNameByZXing(string Text, int ImageSize = 500, CorrectionLevel Correction = CorrectionLevel.High, int Margin = 0)
{
QRCodeWriter qr = new ZXing.QrCode.QRCodeWriter(); //QRCode as a BitMatrix 2D array
Dictionary <EncodeHintType, object> hint = new Dictionary <EncodeHintType, object>();
hint.Add(EncodeHintType.MARGIN, Margin); // margin of the QRCode image
hint.Add(EncodeHintType.ERROR_CORRECTION, Correction);
var matrix = qr.encode(Text, BarcodeFormat.QR_CODE, ImageSize, ImageSize, hint); // encode QRCode matrix from source text
ZXing.BarcodeWriter w = new ZXing.BarcodeWriter();
Bitmap img = w.Write(matrix); // QRCode Bitmap image
string tempFile = Path.GetTempFileName(); //create a temp file to save QRCode image
img.Save(tempFile, System.Drawing.Imaging.ImageFormat.Png); //save QRCode image to temp file
return(tempFile);
}
/// <summary>
/// Draw qr code on enable.
/// </summary>
void OnEnable()
{
_using = GameObject.FindObjectOfType <UsingCon>();
ZXing.QrCode.QRCodeWriter QRWriter = new ZXing.QrCode.QRCodeWriter();
BitMatrix encoded = QRWriter.encode(_using.profile.passCode, ZXing.BarcodeFormat.QR_CODE, 512, 512);
Texture2D tex = new Texture2D(512, 512, TextureFormat.RGBA32, false);
Color[] pixels = tex.GetPixels();
int k = 0;
for (int j = 0; j < 512; j++)
{
ZXing.Common.BitArray row = new ZXing.Common.BitArray(512);
row = encoded.getRow(j, null);
int[] intRow = row.Array;
for (int i = intRow.Length - 1; i >= 0; i--)
{
int thirtyTwoPixels = intRow[i];
for (int b = 31; b >= 0; b--)
{
int pixel = ((thirtyTwoPixels >> b) & 1);
if (pixel == 0)
{
pixels[k] = Color.white;
}
else
{
pixels[k] = Color.black;
}
k++;
}
}
}
print("PassCode for draw QR : " + _using.profile.passCode);
tex.SetPixels(pixels);
tex.Apply();
qr_output.material.mainTexture = tex;
}
public static ImageSource ToQrImageSource(this ISdp sdp, int width, int height)
{
var qrCodeWriter = new QRCodeWriter();
var bitMatrix = qrCodeWriter.encode(sdp.ToString(), ZXing.BarcodeFormat.QR_CODE, width, height);
var canvasImageSource = new CanvasImageSource(CanvasDevice.GetSharedDevice(), width, height, 96);
using (var drawingSession = canvasImageSource.CreateDrawingSession(Color.FromArgb(255, 255, 255, 255)))
{
for (var y = 0; y < height; y++)
{
for (var x = 0; x < width; x++)
{
if (bitMatrix.get(x, y))
{
drawingSession.DrawRectangle(x, y, 1, 1, Color.FromArgb(255, 0, 0, 0));
}
}
}
}
return canvasImageSource;
}
protected override void OnCreate(Bundle bundle)
{
base.OnCreate (bundle);
SetContentView (Resource.Layout.qr_generator_activity);
initGUI ();
btn_gen.Click += delegate {
if(!inputText.Text.Equals("")){
try{
writer = new QRCodeWriter();
matrix = writer.encode(inputText.Text, BarcodeFormat.QR_CODE, size, size);
int height = matrix.Height;
int width = matrix.Width;
int[] pixels = new int[width * height];
for (int y = 0; y < height; y++)
{
int offset = y * width;
for (int x = 0; x < width; x++)
{
// pixels[offset + x] = bitMatrix.get(x, y) ? 0xFF000000
// : 0xFFFFFFFF;
pixels[offset + x] = matrix[x,y] ? Android.Graphics.Color.Black : Android.Graphics.Color.White;
}
}
Bitmap bitmap = Bitmap.CreateBitmap(width, height, Bitmap.Config.Argb8888);
bitmap.SetPixels(pixels, 0, width, 0, 0, width, height);
qrCodeView.SetImageBitmap(bitmap);
}catch(Exception e){
Console.WriteLine(e.StackTrace);
}
}else{
Toast.MakeText(this, "Nothing to encode!", ToastLength.Long).Show();
}
};
}
