https://github.com/notpeter/playdate-qrcode
Fast QRCode Generation for the Playdate game console
https://github.com/notpeter/playdate-qrcode
Last synced: 12 months ago
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Fast QRCode Generation for the Playdate game console
- Host: GitHub
- URL: https://github.com/notpeter/playdate-qrcode
- Owner: notpeter
- License: mit
- Created: 2025-06-04T18:08:05.000Z (12 months ago)
- Default Branch: main
- Last Pushed: 2025-06-04T18:11:15.000Z (12 months ago)
- Last Synced: 2025-06-05T16:53:44.494Z (12 months ago)
- Language: C
- Size: 288 KB
- Stars: 3
- Watchers: 0
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# playdate-qrcode
C-Accelerated Lua API to rapidly generate QRCode images 75-150x faster than Playdate QR SDK
## Example
```
./run.sh simulator
```
See [Source/main.lua](Source/main.lua) for how this works.
## Usage (Lua)
1. Copy the `Makefile`, `src` dir and `library` dir into your Lua Playdate Project.
2. Generate a image with a QRcode:
```lua
local image = quick_qr.generate("https://panic.com")`
image:drawScaled(20, 20, 4, 4)
```
CMake also provided if you prefer that over GNU Makefile.
### Usage (C)
Adapt the code in [quick_qr.c](src/quick_qr.c) and [quick_qr.h](src/quick_qr.h) for your needs.
Include [qrcodegen.c](src/qrcodegen.c) / [qrcodegen.h](src/qrcodegen.h) in your project.
## Why?
The QRCode library [included in the PlaydateSDK](https://github.com/notpeter/playdate-luaqrcode)
is a fork [speedata/luaqrcode](https://github.com/speedata/luaqrcode)
written in Pure Lua, which is slow.
For example, creating a QR Code from "https://play.date/" (16 characters) takes 1050ms.
This C implementation is faster. Much faster:
Length | Lua | C | Speedup
------ | --------| ------| ---------
16 | 1050ms | 7ms | 150x
100 | 2267ms | 21ms | 100x
254 | 3934ms | 46ms | 85x
1323 | 16114ms | 214ms | 75x
## Giving Thanks
If you find this software useful::
1. [Sponsor me on GitHub](https://github.com/sponsors/notpeter/)
2. Purchase something from [notpeter.itch.io](https://notpeter.itch.io)
3. Send me free copies of your Playdate apps! (DM me on Twitter/BlueSky)
## 3rd Party Components
### [nayuki/QR-Code-generator/c](https://github.com/nayuki/QR-Code-generator/tree/master/c)
- files: [qrcodegen.c](src/qrcodegen.c), [qrcodegen.h](src/qrcodegen.h)
- author: [Project Nayuki](https://github.com/nayuki)
- license: MIT
- updated: 2022-02-02
- commit: [c147f7e328d1e5bdcf5aac76c7d7b90516c1058d](https://github.com/nayuki/QR-Code-generator/tree/c147f7e328d1e5bdcf5aac76c7d7b90516c1058d)
- changes: Add `#define assert` no-op.