Barcodes¶

Code 39¶

Here is an example on how to generate a Code 39 barcode:

from fpdf import FPDF

pdf = FPDF()
pdf.add_page()
pdf.code39("*fpdf2*", x=30, y=50, w=4, h=20)
pdf.output("code39.pdf")

Output preview:

Interleaved 2 of 5¶

Here is an example on how to generate an Interleaved 2 of 5 barcode:

from fpdf import FPDF

pdf = FPDF()
pdf.add_page()
pdf.interleaved2of5("1337", x=50, y=50, w=4, h=20)
pdf.output("interleaved2of5.pdf")

Output preview:

PDF-417¶

Here is an example on how to generate a PDF-417 barcode using the pdf417 lib:

from fpdf import FPDF
from pdf417 import encode, render_image

pdf = FPDF()
pdf.add_page()
img = render_image(encode("Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed non risus. Suspendisse lectus tortor, dignissim sit amet, adipiscing nec, ultricies sed, dolor. Cras elementum ultrices diam."))
pdf.image(img, x=10, y=50)
pdf.output("pdf417.pdf")

Output preview:

QRCode¶

Here is an example on how to generate a QR Code using the python-qrcode lib:

from fpdf import FPDF
import qrcode

pdf = FPDF()
pdf.add_page()
img = qrcode.make("fpdf2")
pdf.image(img.get_image(), x=50, y=50)
pdf.output("qrcode.pdf")

Output preview:

DataMatrix¶

fpdf2 can be combined with the pystrich library to generate DataMatrix barcodes: pystrich generates pilimages, which can then be inserted into the PDF file via the FPDF.image() method.

from fpdf import FPDF
from pystrich.datamatrix import DataMatrixEncoder, DataMatrixRenderer


# Define the properties of the barcode
positionX = 10
positionY = 10
width = 57
height = 57
cellsize = 5

# Prepare the datamatrix renderer that will be used to generate the pilimage
encoder = DataMatrixEncoder("[Text to be converted to a datamatrix barcode]")
encoder.width = width
encoder.height = height
renderer = DataMatrixRenderer(encoder.matrix, encoder.regions)

# Generate a pilimage and move it into the memory stream
img = renderer.get_pilimage(cellsize)

# Draw the barcode image into a PDF file
pdf = FPDF()
pdf.add_page()
pdf.image(img, positionX, positionY, width, height)
pdf.output("datamatrix.pdf")

Extend FPDF with a datamatrix() method¶

The code above could be added to the FPDF class as an extension method in the following way:

from fpdf import FPDF
from pystrich.datamatrix import DataMatrixEncoder, DataMatrixRenderer


class PDF(FPDF):
    def datamatrix(self, text, w, h=None, x=None, y=None, cellsize=5):
        if x is None:
            x = self.x
        if y is None:
            y = self.y
        if h is None:
            h = w
        encoder = DataMatrixEncoder(text)
        encoder.width = w
        encoder.height = h
        renderer = DataMatrixRenderer(encoder.matrix, encoder.regions)
        img = renderer.get_pilimage(cellsize)
        self.image(img, x, y, w, h)


# Usage example:
pdf = PDF()
pdf.add_page()
pdf.set_font("Helvetica", size=24)
pdf.datamatrix("Hello world!", w=100)
pdf.output("datamatrix_from_method.pdf")

Code128¶

Here is an example on how to generate a Code 128 barcode using the python-barcode lib, that can be installed by running pip install python-barcode:

from io import BytesIO
from fpdf import FPDF
from barcode import Code128
from barcode.writer import SVGWriter

# Create a new PDF document
pdf = FPDF()
pdf.add_page()

# Set the position and size of the image in the PDF
x = 50
y = 50
w = 100
h = 70

# Generate a Code128 Barcode as SVG:
svg_img_bytes = BytesIO()
Code128("100000902922", writer=SVGWriter()).write(svg_img_bytes)
pdf.image(svg_img_bytes, x=x, y=y, w=w, h=h)

# Output a PDF file:
pdf.output("code128_barcode.pdf")

Output Preview: