QR code with type

cj

I was hoping to find a way to use drawbot to create a minimal, typographic QR code.

I saw this post: https://forum.drawbot.com/topic/274/qrcodegenerator-size-message?_=1647813283414

which uses apple's QRCodeGenerator and converts the image to pixels. I was hoping to do something more like ASCII art, so I could use my own typeface for the squares.

I found this library: https://github.com/lincolnloop/python-qrcode
which takes an argument --ascii

qr --ascii "Some data" > "test.txt"

and that outputs as box drawing characters (not actually ASCII) to represent 2 lines at a time. Eg. it uses U+2588 █, U+x2580 ▀, or U+2584 ▄. But this isn't quite what I'm looking for.

What I would like to do is instead parse this same data into single lines (not double) and represent it with something like /H and /space, or and ▢. But I'm struggling to figure this one out. Has anyone here done something like this? Or have any suggestions? Even better if I can isolate out the corner finder patterns separately (see attached example)

Thanks so much!
CJ

qr text example

frederik

expanding Gustavo's example:

import colorsys

path = bytes('http://www.drawbot.com/', 'utf-8')

w, h = 31, 31
s = 10

size(w*s, h*s)

img = ImageObject()
img.QRCodeGenerator((w, h), path, 'Q')

iw, ih = img.size()

t = ""

for y in reversed(range(int(ih))):
    for x in range(int(iw)):
        r, g, b, a = imagePixelColor(img, (x, y))
        _, l, _ = colorsys.rgb_to_hls(r, g, b)
        if l < 0.51:
            fill(0)            
            rect(x*s, y*s, s, s)
            t += "W"
        else:
            t += " "
    
    t += "\n"

newPage()
font("Menlo", 16)
lineHeight(10)
textBox(t, (0, 0, width(), height()))
print(t)

and the corners are always the same

cj

@frederik this works, thanks so much!

dersenn

Hello fellow Drawboteers
I'm also trying to generate some QR-Codes. And these two posts already helped me get on the right track.

But now I can't figure out how to create a more complex QR-Code for a longer string (with 57x57 grid). I don't understand the relation between string-length and the specified "w, h" variables. Given the example on Apple Developer it should be possible to create more complex codes with QRCodeGenerator...

Any help is appreciated! Thank you.