Simple (if you consider QR code as simple) headers-only C++ implementation of QR code generation algorithm. Inspiration is mainly taken from nayuki's library and some code parts are borrowed, but the approach is mainly different. This library is designed for convenient use when QR code version (size) is known at compile time, and all necessary arrays are alocated and encapsulated in QR<> class.
User must choose appropriate QR code version, Error Correction Level and either choose mask manually or leave it
as -1 to select automaically.
constexpr auto ver = 3;
constexpr auto ecc = qr::Ecc::H;
constexpr auto str = "HELLO WORLD";
qr::Qr<ver> codec;
codec.encode(str, strlen(str), ecc, 0); // Manual mask 0
codec.encode(str, strlen(str), ecc, -1); // Automatic mask
for (int y = 0; y < codec.side_size(); ++y) { // Print manually module by module
for (int x = 0; x < codec.side_size(); ++x)
printf("%s", codec.module(x, y) ? "\u2588\u2588" : " ");
printf("\n");
}- tests