BarcodeQRGetSize Method (GdPictureImaging)

In This Topic

Returns the size, in pixels, required to render a QrCode on a Bitmap.

Syntax

Visual Basic
C#
Delphi
JScript
Managed Extensions for C++
C++/CLI

'Declaration
 
Public Function BarcodeQRGetSize( _
   ByVal Data As String, _
   ByVal EncodingMode As BarcodeQREncodingMode, _
   ByVal ErrorCorrectionLevel As BarcodeQRErrorCorrectionLevel, _
   ByRef Version As Integer, _
   ByVal QuietZone As Integer, _
   ByVal ModuleSize As Integer _
) As Integer

public int BarcodeQRGetSize( 
   string Data,
   BarcodeQREncodingMode EncodingMode,
   BarcodeQRErrorCorrectionLevel ErrorCorrectionLevel,
   out int Version,
   int QuietZone,
   int ModuleSize
)

public function BarcodeQRGetSize( 
    Data: String;
    EncodingMode: BarcodeQREncodingMode;
    ErrorCorrectionLevel: BarcodeQRErrorCorrectionLevel;
   Out  Version: Integer;
    QuietZone: Integer;
    ModuleSize: Integer
): Integer;

public function BarcodeQRGetSize( 
   Data : String,
   EncodingMode : BarcodeQREncodingMode,
   ErrorCorrectionLevel : BarcodeQRErrorCorrectionLevel,
   Version : int,
   QuietZone : int,
   ModuleSize : int
) : int;

public: int BarcodeQRGetSize( 
   string* Data,
   BarcodeQREncodingMode EncodingMode,
   BarcodeQRErrorCorrectionLevel ErrorCorrectionLevel,
   [PARAMFLAG::Out] int Version,
   int QuietZone,
   int ModuleSize
)

public:
int BarcodeQRGetSize( 
   String^ Data,
   BarcodeQREncodingMode EncodingMode,
   BarcodeQRErrorCorrectionLevel ErrorCorrectionLevel,
   [Out] int Version,
   int QuietZone,
   int ModuleSize
)

Parameters

Data: The data of the barcode to encode.
EncodingMode: A member of the BarcodeQREncodingMode enumeration. The encoding mode.
ErrorCorrectionLevel: A member of the BarcodeQRErrorCorrectionLevel enumeration. The error correction level.
Version: Ref. parameter. The version of the QrCode. In the range 0 - 40. Specifies the overall dimensions of the symbol.Use 0 to let the engine decide and return the minimum version required to encode all data.
QuietZone: The number of modules composing the quiet zone. The quiet zone defines the margin around the barcode. QR Code requires a four-module wide margin at all sides of a symbol. Consequently a value superior or equal to 4 is highly suggested.
ModuleSize: The size of each module, in pixels. A value superior or equal to 4 is recommended.

Return Value

The size, in pixels, required to render a QrCode.

Remarks

You can use the GetStat method to determine if the method succeeded.

Example

Rendering a QrCode to a new image and saving the result into a png file.

using (GdPictureImaging gdpictureImaging = new GdPictureImaging())
{
    // String that have to be encoded into a barcode.
    string data = "Encoding Qr Code";
 
    BarcodeQREncodingMode encodingMode = BarcodeQREncodingMode.BarcodeQREncodingModeUndefined;
    BarcodeQRErrorCorrectionLevel errorCorrectionLevel = BarcodeQRErrorCorrectionLevel.BarcodeQRErrorCorrectionLevelM;
    int version = 0;
    int moduleSize = 7;
    int quietZone = 4;
    int fillColor = gdpictureImaging.ARGBI(255, 0, 0, 0);
    int backColor = gdpictureImaging.ARGBI(0, 255, 255, 255);
 
    // Compute size (in pixels), required to render a Qr Code.
    int size = gdpictureImaging.BarcodeQRGetSize(data, encodingMode, errorCorrectionLevel, out version, quietZone, moduleSize);
 
    int imageID = gdpictureImaging.CreateNewGdPictureImage(size, size, 32, Color.White);
    gdpictureImaging.BarcodeQRWrite(imageID, data, encodingMode, errorCorrectionLevel, version, quietZone, moduleSize, 0, 0, 0, fillColor, backColor);
    gdpictureImaging.SaveAsPNG(imageID, "QrCode.png");
 
    // Release used resources.
    gdpictureImaging.ReleaseGdPictureImage(imageID);
}

Reference

GdPictureImaging Class
GdPictureImaging Members
BarcodeQRWrite(Int32,String,BarcodeQREncodingMode,BarcodeQRErrorCorrectionLevel,Int32,Int32,Int32,Int32,Int32,Single,GdPictureColor,GdPictureColor) Method