C++ Requires Chilkat v11.7.0+

Generate a QR Code as SVG

See more QR Code Examples

Demonstrates SVG output. An SVG is a vector image, so it stays sharp at any size, which suits print and responsive web pages. Setting output.format to svg and output.return to text returns the SVG document as a string in outputs[0].text. The SVG can also be written straight to a file with output.path, the same as a PNG. C++

#include <CkJsonObject.h>
#include <CkFormats.h>
#include <CkStringBuilder.h>

void ChilkatSample(void)
    {
    bool success = false;

    //  This example requires the Chilkat API to have been previously unlocked.
    //  See Global Unlock Sample for sample code.

    CkJsonObject json;
    json.UpdateString("payload.text","https://www.chilkatsoft.com/");
    json.UpdateString("output.format","svg");

    //  An SVG is text, so it can be returned as text rather than as base64.
    json.UpdateString("output.return","text");

    CkFormats fmt;
    CkJsonObject jsonOut;
    success = fmt.QrCode("generate",json,jsonOut);
    if (success == false) {
        std::cout << fmt.lastErrorText() << "\r\n";
        return;
    }

    CkStringBuilder sbSvg;
    jsonOut.StringOfSb("outputs[0].text",sbSvg);

    std::cout << "MIME type: " << jsonOut.stringOf("outputs[0].mimeType") << "\r\n";
    std::cout << "size: " << jsonOut.IntOf("outputs[0].width") << " x " << jsonOut.IntOf("outputs[0].height") << " " << jsonOut.stringOf("outputs[0].units") << "\r\n";
    std::cout << "SVG length: " << sbSvg.get_Length() << " characters" << "\r\n";

    //  The SVG is a complete document that can be saved, or placed inline in an HTML page.
    success = sbSvg.WriteFile("qa_output/qr_chilkat.svg","utf-8",false);
    if (success == false) {
        std::cout << sbSvg.lastErrorText() << "\r\n";
        return;
    }

    //  The SVG:

    //  

    //  Sample output:

    //  MIME type: image/svg+xml
    //  size: 148 x 148 px
    //  SVG length: 12500 characters
    }