Zig 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. Zig

const std = @import("std");
const chilkat = @import("chilkat");

pub fn main(init: std.process.Init) !void {
    const alloc = init.arena.allocator();

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

    const json = try chilkat.JsonObject.init();
    defer json.deinit();
    json.updateString("payload.text", "https://www.chilkatsoft.com/") catch {};
    json.updateString("output.format", "svg") catch {};

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

    const fmt = try chilkat.Formats.init();
    defer fmt.deinit();
    const json_out = try chilkat.JsonObject.init();
    defer json_out.deinit();
    fmt.qrCode("generate", json, json_out) catch {
        std.debug.print("{s}\n", .{try fmt.getLastErrorText(alloc)});
        return;
    };

    const sb_svg = try chilkat.StringBuilder.init();
    defer sb_svg.deinit();
    json_out.stringOfSb("outputs[0].text", sb_svg) catch {};

    std.debug.print("MIME type: {s}\n", .{try json_out.stringOf(alloc, "outputs[0].mimeType")});
    std.debug.print("size: {d} x {d} {s}\n", .{ json_out.intOf("outputs[0].width"), json_out.intOf("outputs[0].height"), try json_out.stringOf(alloc, "outputs[0].units") });
    std.debug.print("SVG length: {d} characters\n", .{sb_svg.getLength()});

    // The SVG is a complete document that can be saved, or placed inline in an HTML page.
    sb_svg.writeFile("qa_output/qr_chilkat.svg", "utf-8", false) catch {
        std.debug.print("{s}\n", .{try sb_svg.getLastErrorText(alloc)});
        return;
    };

    // The SVG:

    // 

    // Sample output:

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