// Creates a variety of QR Codes that exercise different features of the library, and writes each one to file.
private static void DoVarietyDemo()
{
QrCode qr;
// Numeric mode encoding (3.33 bits per digit)
qr = QrCode.EncodeText("314159265358979323846264338327950288419716939937510", Ecc.Medium);
WritePng(qr.ToImage(13, 1), "pi-digits-QR.png");
// Alphanumeric mode encoding (5.5 bits per character)
qr = QrCode.EncodeText("DOLLAR-AMOUNT:$39.87 PERCENTAGE:100.00% OPERATIONS:+-*/", Ecc.High);
WritePng(qr.ToImage(10, 2), "alphanumeric-QR.png");
// Unicode text as UTF-8
qr = QrCode.EncodeText("こんにちwa、世界！ αβγδ", Ecc.Quartitle);
WritePng(qr.ToImage(10, 3), "unicode-QR.png");
// Moderately large QR Code using longer text (from Lewis Carroll's Alice in Wonderland)
qr = QrCode.EncodeText(
"Alice was beginning to get very tired of sitting by her sister on the bank, "
+ "and of having nothing to do: once or twice she had peeped into the book her sister was reading, "
+ "but it had no pictures or conversations in it, 'and what is the use of a book,' thought Alice "
+ "'without pictures or conversations?' So she was considering in her own mind (as well as she could, "
+ "for the hot day made her feel very sleepy and stupid), whether the pleasure of making a "
+ "daisy-chain would be worth the trouble of getting up and picking the daisies, when suddenly "
+ "a White Rabbit with pink eyes ran close by her.", Ecc.High);
WritePng(qr.ToImage(6, 10), "alice-wonderland-QR.png");
}
public void BitmapColorImageTest()
{
var qrCode = QrCode.EncodeText("The quick brown fox jumps over the lazy dog", QrCode.Ecc.High);
var fg = Color.Red;
var bg = Color.Black;
using (var bitmap = qrCode.ToBitmap(3, 0, fg, bg))
{
var containsFg = false;
var containsBg = false;
//Start from bottom right
for (int i = bitmap.Height - 1; i >= 0 && !(containsFg && containsBg); i--)
{
for (int j = bitmap.Width - 1; j >= 0 && !(containsFg && containsBg); j--)
{
var pixel = bitmap.GetPixel(j, i).ToArgb();
if (pixel == fg.ToArgb())
{
containsFg = true;
}
else if (pixel == bg.ToArgb())
{
containsBg = true;
}
}
}
Assert.True(containsFg);
Assert.True(containsBg);
}
}
public override void Process(TagHelperContext context, TagHelperOutput output)
{
if (string.IsNullOrWhiteSpace(Data) || Border < 0)
{
output.SuppressOutput();
return;
}
var qrCode = QrCode.EncodeText(Data, _configuration.ErrorCorrectionLevel);
if (_configuration.Format == QrCodeFormat.Svg)
{
var svg = qrCode.ToSvgString(Border);
output.Content.AppendHtml(svg);
}
else
{
if (Scale <= 0)
{
output.SuppressOutput();
return;
}
var bitmap = qrCode.ToImage(Scale, Border);
using var ms = new MemoryStream();
bitmap.Save(ms, ImageFormat.Png);
var base64 = Convert.ToBase64String(ms.ToArray());
output.Content.AppendHtml($"<img src=\"data:image/png;base64,{base64}\"/>");
}
output.TagName = null;
}
public static string createQRCode(string sceneName, string host)
{
NameBasedGenerator uuidCreator = new NameBasedGenerator(HashType.SHA1);
ImageFormat imageFormat = ImageFormat.Png;
string markerUUID = uuidCreator.GenerateGuid(sceneName + DateTime.Now).ToString();
string url = host + "/QRCode/Open?uuid=";
string content = url + markerUUID;
QrCode qr = QrCode.EncodeText(content, QrCode.Ecc.Medium);
string dir = Directory.GetCurrentDirectory();
string filename = markerUUID + "." + imageFormat.ToString();
var path = Path.Combine(
dir, "static", "content", "marker",
filename);
using (var stream = new FileStream(path, FileMode.Create))
using (var bitmap = qr.ToBitmap(40, 1))
{
bitmap.Save(stream, imageFormat);
}
return(filename);
}
/// <summary>
/// Draws the QR code to the specified graphics context (canvas). The QR code will
/// always be 46 mm by 46 mm.
/// </summary>
/// <param name="graphics">The graphics context.</param>
/// <param name="offsetX">The x offset.</param>
/// <param name="offsetY">The y offset.</param>
internal void Draw(ICanvas graphics, double offsetX, double offsetY)
{
QrCode qrCode = QrCode.EncodeText(_embeddedText, QrCode.Ecc.Medium);
bool[,] modules = CopyModules(qrCode);
ClearSwissCrossArea(modules);
int modulesPerSide = modules.GetLength(0);
graphics.SetTransformation(offsetX, offsetY, 0, Size / modulesPerSide / 25.4 * 72, Size / modulesPerSide / 25.4 * 72);
graphics.StartPath();
DrawModulesPath(graphics, modules);
graphics.FillPath(0);
graphics.SetTransformation(offsetX, offsetY, 0, 1, 1);
// Swiss cross
graphics.StartPath();
graphics.AddRectangle(20, 20, 6, 6);
graphics.FillPath(0);
const double barWidth = 7 / 6.0;
const double barLength = 35 / 9.0;
graphics.StartPath();
graphics.AddRectangle(23 - barWidth / 2, 23 - barLength / 2, barWidth, barLength);
graphics.AddRectangle(23 - barLength / 2, 23 - barWidth / 2, barLength, barWidth);
graphics.FillPath(0xffffff);
}
internal static void QrCodeWithImage()
{
var text = "https://github.com/manuelbl/QrCodeGenerator";
var filename = "qr-code-with-image.png";
var logoFilename = "heart.png";
const float logoWidth = 0.15f; // logo will have 15% the width of the QR code
var qr = QrCode.EncodeText(text, QrCode.Ecc.Medium);
using (var bitmap = qr.ToBitmap(scale: 10, border: 4))
using (var logo = Image.Load(logoFilename))
{
// resize logo
var w = (int)Math.Round(bitmap.Width * logoWidth);
logo.Mutate(logo => logo.Resize(w, 0));
// draw logo in center
var topLeft = new Point((bitmap.Width - logo.Width) / 2, (bitmap.Height - logo.Height) / 2);
bitmap.Mutate(img => img.DrawImage(logo, topLeft, 1));
// save as PNG
bitmap.SaveAsPng(filename);
}
Console.WriteLine($"The QR code has been saved as {Path.GetFullPath(filename)}");
}
private void RegenerateQr()
{
var qr = QrCode.EncodeText(SourceText.Text, QrCode.Ecc.Medium);
var bitmap = qr.ToBitmap(scale: 10, border: 1);
//bitmap.Save("qr-code.png", ImageFormat.Png);
QrPicture.Image = bitmap;
}
private byte[] GetBase64QrCodeData(string url)
{
var qrCode = QrCode.EncodeText(url, Options.GetQrCodeErrorCorrectionLevel());
var img = qrCode.ToBitmap(Options.QrCodeScale, Options.QrCodeBorderSize);
MemoryStream stream = new MemoryStream();
img.Save(stream, ImageFormat.Bmp);
return(stream.ToArray());
}
// Creates a single QR code, then writes it to an SVG file.
private static void DoBasicDemo()
{
const string text = "Hello, world!"; // User-supplied Unicode text
var errCorLvl = QrCode.Ecc.Low; // Error correction level
var qr = QrCode.EncodeText(text, errCorLvl); // Make the QR code symbol
SaveAsSvg(qr, "hello-world-QR.svg", border: 4); // Save as SVG
}
private void CopyButton_Click(object sender, RoutedEventArgs e)
{
// put the QR code on the clipboard as a bitmap
var qrCode = QrCode.EncodeText(_text, ErrorCorrection);
var bitmap = QrCodeDrawing.CreateBitmapImage(qrCode, 20, BorderWidth);
var dataObject = new DataObject();
dataObject.SetData(DataFormats.Bitmap, bitmap);
Clipboard.SetDataObject(dataObject);
}
public ActionResult <byte[]> GenerateSvg([FromQuery(Name = "text")] string text,
[FromQuery(Name = "ecc")] int?ecc, [FromQuery(Name = "border")] int?borderWidth)
{
ecc = Math.Clamp(ecc ?? 1, 0, 3);
borderWidth = Math.Clamp(borderWidth ?? 3, 0, 999999);
var qrCode = QrCode.EncodeText(text, errorCorrectionLevels[(int)ecc]);
byte[] svg = Encoding.UTF8.GetBytes(qrCode.ToSvgString((int)borderWidth));
return(new FileContentResult(svg, "image/svg+xml; charset=utf-8"));
}
// Create a QR code and save it as a PNG.
internal static void Main()
{
var text = "Hello, world!";
var filename = "hello-world-QR.png";
var qr = QrCode.EncodeText(text, QrCode.Ecc.Medium); // Create the QR code symbol
qr.SaveAsPng(filename, scale: 10, border: 4);
Console.WriteLine($"The QR code has been saved as {Path.GetFullPath(filename)}");
}
public ActionResult <byte[]> GeneratePng([FromQuery(Name = "text")] string text,
[FromQuery(Name = "ecc")] int?ecc, [FromQuery(Name = "border")] int?borderWidth)
{
ecc = Math.Clamp(ecc ?? 1, 0, 3);
borderWidth = Math.Clamp(borderWidth ?? 3, 0, 999999);
var qrCode = QrCode.EncodeText(text, errorCorrectionLevels[(int)ecc]);
byte[] png = qrCode.ToPng(20, (int)borderWidth);
return(new FileContentResult(png, "image/png"));
}
// Creates QR Codes with manually specified segments for better compactness.
private static void DoSegmentDemo()
{
QrCode qr;
List <QrSegment> segs;
// Illustration "silver"
var silver0 = "THE SQUARE ROOT OF 2 IS 1.";
var silver1 = "41421356237309504880168872420969807856967187537694807317667973799";
qr = QrCode.EncodeText(silver0 + silver1, Ecc.Low);
WritePng(qr.ToImage(10, 3), "sqrt2-monolithic-QR.png");
segs = new List <QrSegment>()
{
QrSegment.MakeAlphanumeric(silver0),
QrSegment.MakeNumeric(silver1)
};
qr = QrCode.EncodeSegments(segs, Ecc.Low);
WritePng(qr.ToImage(10, 3), "sqrt2-segmented-QR.png");
// Illustration "golden"
var golden0 = "Golden ratio φ = 1.";
var golden1 = "6180339887498948482045868343656381177203091798057628621354486227052604628189024497072072041893911374";
var golden2 = "......";
qr = QrCode.EncodeText(golden0 + golden1 + golden2, Ecc.Low);
WritePng(qr.ToImage(8, 5), "phi-monolithic-QR.png");
segs = new List <QrSegment>()
{
QrSegment.MakeBytes(Encoding.UTF8.GetBytes(golden0)),
QrSegment.MakeNumeric(golden1),
QrSegment.MakeAlphanumeric(golden2)
};
qr = QrCode.EncodeSegments(segs, Ecc.Low);
WritePng(qr.ToImage(8, 5), "phi-segmented-QR.png");
// Illustration "Madoka": kanji, kana, Cyrillic, full-width Latin, Greek characters
var madoka = "「魔法少女まどか☆マギカ」って、 ИАИ ｄｅｓｕ κα？";
qr = QrCode.EncodeText(madoka, Ecc.Low);
WritePng(qr.ToImage(9, 4), "madoka-utf8-QR.png");
segs = new List <QrSegment>()
{
QrSegmentAdvanced.MakeKanji(madoka)
};
qr = QrCode.EncodeSegments(segs, Ecc.Low);
WritePng(qr.ToImage(9, 4), "madoka-kanji-QR.png");
}
private void ShowEditorLocalIP()
{
string getLocalIP()
{
var host = Dns.GetHostEntry(Dns.GetHostName());
foreach (var ip in host.AddressList)
{
if (ip.AddressFamily == AddressFamily.InterNetwork)
{
return(ip.ToString());
}
}
throw new Exception("no local ip found.");
}
// ローカルIPを取得
var localIp = getLocalIP();
// qrコードを生成する
var qr = QrCode.EncodeText(localIp, QrCode.Ecc.Medium);
var(bits, w, h) = qr.ToBitPattern(); // デフォサイズが441, 21x21、これが仕様上最小
// テクスチャにポイントを描く。
var drawTexture = new Texture2D(w, h, TextureFormat.RGBA32, false);
drawTexture.filterMode = FilterMode.Point;
for (var i = 0; i < w * h; i++)
{
var isOn = bits[i];
if (isOn)
{
var x = i / w;
var y = i % h;
drawTexture.SetPixels(x, y, 1, 1, new Color[] { Color.black }, 0);
}
}
drawTexture.Apply();
var canvasResourcePrefab = Resources.Load("a-npanResource/a-npanQRCanvas") as GameObject;
var canvasObj = GameObject.Instantiate(canvasResourcePrefab);
var image = canvasObj.transform.GetChild(0).GetComponent <Image>();
image.sprite = Sprite.Create(drawTexture, new Rect(0, 0, drawTexture.width, drawTexture.height), Vector2.zero);
}
// Creates a single QR Code, then writes it to a PNG file and an SVG file.
private static void DoBasicDemo()
{
var text = "Hello, world!"; // User-supplied Unicode text
var errCorLvl = Ecc.Low; // Error correction level
var qr = QrCode.EncodeText(text, errCorLvl); // Make the QR Code symbol
var img = qr.ToImage(10, 4); // Convert to bitmap image
WritePng(img, "hello-world-QR.png"); // Write image to file
var svg = qr.ToSvgString(4); // Convert to SVG XML code
File.WriteAllText("hello-world-QR.svg", svg); // Write image to file
}
public static void RegenerateQr(int resolution, string text, PictureBox QrPicture, ProgressBar progressBar1)
{
progressBar1.Value = 0;
if (text.Equals(""))
{
return;
}
progressBar1.Value = 80;
var qr = QrCode.EncodeText(text, QrCode.Ecc.Medium);
var bitmap = qr.ToBitmap(scale: resolution, border: 1);
progressBar1.Value = 100;
//bitmap.Save("qr-code.png", ImageFormat.Png);
QrPicture.Image = bitmap;
}
// Creates a single QR code, then writes it to a PNG file and an SVG file.
private static void DoBasicDemo()
{
const string text = "Hello, world!"; // User-supplied Unicode text
var errCorLvl = QrCode.Ecc.Low; // Error correction level
var qr = QrCode.EncodeText(text, errCorLvl); // Make the QR code symbol
using (var img = qr.ToBitmap(10, 4)) // Convert to bitmap image
{
img.Save("hello-world-QR.png", ImageFormat.Png); // Write image to file
}
string svg = qr.ToSvgString(4); // Convert to SVG XML code
File.WriteAllText("hello-world-QR.svg", svg, Encoding.UTF8); // Write image to file
}
static void Main()
{
var vcard = new VCard
{
Version = VCardVersion.V3,
FirstName = "Robin",
LastName = "Hood",
Organization = "Sherwood Inc.",
Addresses = new List <Address>
{
new Address {
Type = AddressType.Work,
Street = "The Major Oak",
Locality = "Sherwood Forest",
PostalCode = "NG21 9RN",
Country = "United Kingdom",
}
},
Telephones = new List <Telephone>
{
new Telephone {
Type = TelephoneType.Work,
Number = "+441623677321"
}
},
Emails = new List <Email>
{
new Email
{
Type = EmailType.Smtp,
EmailAddress = "*****@*****.**"
}
}
};
var qrCode = QrCode.EncodeText(vcard.Serialize(), QrCode.Ecc.Medium);
File.WriteAllText("vcard-qrcode.svg", qrCode.ToSvgString(3));
}
private void UpdateQrCode()
{
var qrCode = QrCode.EncodeText(_text, ErrorCorrection);
QrCodeImage.Source = QrCodeDrawing.CreateDrawing(qrCode, 192, BorderWidth);
}
/// <summary>
/// Draws the QR code to the specified graphics context (canvas). The QR code will
/// always be 46 mm by 46 mm.
/// </summary>
/// <param name="graphics">The graphics context.</param>
/// <param name="offsetX">The x offset.</param>
/// <param name="offsetY">The y offset.</param>
internal void Draw(ICanvas graphics, double offsetX, double offsetY)
{
var qrCode = QrCode.EncodeText(_embeddedText, QrCode.Ecc.Medium);
var modules = CopyModules(qrCode);
ClearSwissCrossArea(modules);
var modulesPerSide = modules.GetLength(0);
graphics.SetTransformation(offsetX, offsetY, 0, Size / modulesPerSide / 25.4 * 72, Size / modulesPerSide / 25.4 * 72);
graphics.StartPath();
DrawModulesPath(graphics, modules);
graphics.FillPath(0, false);
graphics.SetTransformation(offsetX, offsetY, 0, 1, 1);
// Swiss cross
graphics.StartPath();
graphics.AddRectangle(20, 20, 6, 6);
graphics.FillPath(0, false);
const double barWidth = 7 / 6.0;
const double barLength = 35 / 9.0;
graphics.StartPath();
// A----B
// | |
// | |
// K-----L C-----D
// | |
// | |
// J-----I F-----E
// | |
// | |
// H----G
// Center is (23;23)
// Start in A
graphics.MoveTo(23 - barWidth / 2, 23 - barLength / 2);
// Line to B
graphics.LineTo(23 + barWidth / 2, 23 - barLength / 2);
// Line to C
graphics.LineTo(23 + barWidth / 2, 23 - barWidth / 2);
// Line to D
graphics.LineTo(23 + barLength / 2, 23 - barWidth / 2);
// Line to E
graphics.LineTo(23 + barLength / 2, 23 + barWidth / 2);
// Line to F
graphics.LineTo(23 + barWidth / 2, 23 + barWidth / 2);
// Line to G
graphics.LineTo(23 + barWidth / 2, 23 + barLength / 2);
// Line to H
graphics.LineTo(23 - barWidth / 2, 23 + barLength / 2);
// Line to I
graphics.LineTo(23 - barWidth / 2, 23 + barWidth / 2);
// Line to J
graphics.LineTo(23 - barLength / 2, 23 + barWidth / 2);
// Line to K
graphics.LineTo(23 - barLength / 2, 23 - barWidth / 2);
// Line to K
graphics.LineTo(23 - barWidth / 2, 23 - barWidth / 2);
graphics.FillPath(0xffffff, false);
}