Use of ue5 QRcode plug-in

This plug-in is repackaged with the source code , Do not rely on static libraries , Pure source code , Apply to more than one UE edition , There is no problem with the editor and packaging release . I am UE5EA Upper test passed .

1. Source access address

GitHub - nayuki/QR-Code-generator: High-quality QR Code generator library in Java, TypeScript/JavaScript, Python, Rust, C++, C.

2. Plug-in address

UE4UE5QRCode Source version - Internet document resources -CSDN download

3. Major changes

For use after packaging , Revised UQRCodeComponent Class GenerateQrCode Method ：

UTexture2D* UQRCodeComponent::GenerateQrCode(UObject* parent, FString string)
{
	qrcodegen::QrCode qr = qrcodegen::QrCode::encodeText(TCHAR_TO_UTF8(*string), qrcodegen::QrCode::Ecc::LOW);

	uint8 size = qr.getSize();
	TArray<FColor> pixels;
	pixels.SetNumZeroed(size * size);

	FColor black = FColor::Black;
	FColor white = FColor::White;

	for (uint8 x = 0; x < size; x++)
	{
		for (uint8 y = 0; y < size; y++)
		{
			FColor color = qr.getModule(x, y) ? white : black;
			pixels[x + y * size] = color;
		}
	}

	UTexture2D* texture = UTexture2D::CreateTransient(size, size, EPixelFormat::PF_B8G8R8A8, "QRCode");
	void* data = texture->PlatformData->Mips[0].BulkData.Lock(1);
	FMemory::Memcpy(data, pixels.GetData(), size * size * 4);
	texture->PlatformData->Mips[0].BulkData.Unlock();
	texture->UpdateResource();

	texture->Filter = TextureFilter::TF_Nearest;

	return texture;
}

4. Usage method

1） Create a actor Blueprint class , To add QRCode Components

2） Create a for displaying QR code UI

 3） Write blueprint code in the level blueprint

4） Running effect