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C++ Reference

Module dependency

Add OperatingSystemQRCode to your .Build.cs:

PublicDependencyModuleNames.AddRange(new string[] {
  "Core", "CoreUObject", "Engine", "InputCore", "OperatingSystemQRCode"
});

#include "OperatingSystemQrCodeGenerator.h"

Static API

// Simple black-on-white QR
UTexture2D* QR = UOperatingSystemQrCodeGenerator::GenerateQrCodeTextureSimple(TEXT("Hello world"));

// Custom error correction and colors
UTexture2D* Branded = UOperatingSystemQrCodeGenerator::GenerateQrCodeTexture(
  TEXT("https://yetitechstudios.com"),
  EQrCodeErrorCorrectionLevel::High,
  false,
  FLinearColor::White,
  FLinearColor(0.02f, 0.05f, 0.2f, 1.f),
  true);

Enum

enum class EQrCodeErrorCorrectionLevel : uint8
{
  Low,      // ~7%
  Medium,   // ~15%
  High,     // ~25%
  VeryHigh  // ~30%
};

Notes

Guaranteed for strings with ≤ 2953 UTF-8 code units on the simple path.
Returns a new UTexture2D — store on your UObject or assign to UI brush.
Blueprint category name: Qr Code Generator.