Using QR Code Library

Hello guys,
i want to ask something about this library that i found in Github (GitHub - ricmoo/QRCode: QR code generation library in C, optimized for low-power devices, such as Arduino.)
It says,
How a QR code is used will vary greatly from project to project. For example:

  • Display on an OLED screen (128x64 nicely supports 2 side-by-side version 3 QR codes)
  • Print as a bitmap on a thermal printer
  • Store as a BMP (or with a some extra work, possibly a PNG) on an SD card

I just want to ask how to make a QR Code that i made to convert to BMP and store it to SD card.
Can you help me ? Thank you.

Here’s the BMP file format.
Not too hard to write out to a file for a fixed size and colour depth.