reportlab-qr-code-generator 1.8.0

QR code plugin for reportlab and RML language

Install

pip install reportlab_qr_code_generator

Example output

Why is this better than x?

Including image to PDF

Images are blurry.

reportlab-qrcode

Reportlab qrcode is vector QR code generator for reportlab. My project is better in some aspects:

Images can be directly added to Reportlab RML code.

Better rendering:

This library merges adjacent blocks to single area whihch produces image without gaps in every situation.

Smaller output

First paragraph of Lorem ipsum products using reportlab-qrcode vector image with size 181 418 bytes. My code with produces only 34 131 bytes (81% reduction in size).

Customizable colors

Usage

This package allows insert QR codes to reportlab document.

This package can be used directly from reportlab RML file or from python code.

RML

To insert QR code from rml file use this code:

<plugInGraphic module="reportlab_qr_code" function="qr">parameters;format;contents</plugInGraphic>

Parameters is key=value list delimited using ‘,’ character, e.g. size=10cm,padding=1cm.

Format is either ‘text’ or ‘base64’ for simple text and base64 encoding. QR code contents is after second semicolon.

Complete example:

<illustration height="5cm" width="5cm" align="center">
        <plugInGraphic module="reportlab_qr_code" function="qr">size=5cm,padding=0.5cm;text;Simple text</plugInGraphic>
</illustration>

Python API

QR code can be inserted to canvas using qr_draw(canvas, contents, **params) function.

from reportlab.pdfgen import canvas
from reportlab_qr_code import qr_draw

c = canvas.Canvas("out.pdf")
qr_draw(c, "Hello world", x="1cm", y="1cm", size="10cm")

Command line interface

This module can be used as standalone command to generate PDF document.

Example:

python -m reportlab_qr_code "Content" --outfile qr.pdf

Content argument is optional. Without this argument, command will read from stdin. Output file is optional too, without argument, command will write to stdout.

Arguments:

--outfile

Output file or stdout if omitted

--base64

Base64 encoded text

--compress

PDF compression (default enabled)

--no-compress

Disable compression

--version

QR code version

--error_correction

Error correction strength (L, M, Q or H)

--size

Code size (e.g. 10cm)

--padding

Padding around code (e.g. 1cm or 1 for one pixel or 5%)

--fg

Foreground color

--bg

Background color

--invert

Invert

--negative

Instead of invert bits, inverts whole image

--radius

Round code (radius)

--enhanced-path

Enhanced path rendering

--no-enhanced-path

Disable path enhancement

--gradient

Either "linear x1 y1 x2 y2 colors" or "radial x y radius colors" Dimensions are in range (0, 1), position (0, 0) is top left corner, (1, 1) is bottom right corner. Colors is list "[position] color" e.g. "0.0 #ffffff 1.0 #000000". Position is optional. Without position argument, distances are calculated automatically. Example: --gradient "linear 0.0 0.0 0.1 1.0 0.5 \#1050c0 0.3 \#1050c0 0.7 \#e0e000"

--hole

Coordinates in form x:y:w:h. Allowed are absolute length units, relative units (%) and pixels (without unit suffix).

--draw

Select area to draw. Possuble values are: 'all', 'eye[1-3]', 'eyes', 'eyepupil[1-3]', 'eyepupils', 'eyeball[1-3]', 'eyeballs', 'align', 'alignpupils', 'alignballs'. It’s possible to combine operations with +/- symbol e.g. all-eyes-align. To show only eye1 and eye3 without pupil it’s possible to write something like eye1+eye3-eyepupil3. Arguments passed before first draw are globally set. Arguments after draw are specific for preceding draw call.

Some crazy examples:

# 1
python -m reportlab_qr_code "Padding 1cm" \
        --outfile qr.pdf \
        --error_correction L \
        --size 10cm \
        --padding 1cm \
        --radius 0.5 \
        --enhanced-path \
        --gradient "linear 0 1 1 0 0.1 \#ff0000 0.9 \#0000ff"
# 2
python -m reportlab_qr_code "Padding 1cm" \
        --outfile qr.pdf \
        --error_correction L \
        --size 10cm \
        --padding 1cm \
        --radius 3.5 \
        --gradient "linear 1 0 0 1 0.1 \#ff0000 0.9 \#0000ff"
# 3
python -m reportlab_qr_code "OPENSOURCE" \
        --outfile qr.pdf \
        --size 10cm \
        --padding 1cm \
        --radius 1.5 \
        --bg "\#ddddcc" \
        --fg="\#665510"
# 4
python -m reportlab_qr_code "Padding 1cm" \
        --outfile qr.pdf \
        --error_correction L \
        --size 10cm \
        --padding 1cm \
        --radius 3.5 \
        --enhanced-path \
        --gradient "linear 0 1 1 0 0.1 \#ff0000 0.9 \#0000ff"

Parameter list

Parameters

Name	Default	Description
size	5cm	size of code
padding	2.5	padding size, without any unit this meanss 2.5 QR code pixels, it can be absolute value (like 1cm) or relative value (10%)
fg	black	foreground color
bg	transparent	background color
invert	False	invert pixel values
mask	False	render only mask
negative	False	render negative of code
version	1	version passed to qr code library
error_correction	‘L’	error_correction passed to qr code library (can be L, M, Q or H)
x	0	x offset
y	0	y offset
hole	[]	list of holes in form x:y:w:h… (can be repeated)
draw	+all	select elements to draw. Prefix + (plus) means include, - (minus) exclude. Allowed options are: 'all', 'eye[1-3]', 'eyes', 'eyepupil[1-3]', 'eyepupils', 'eyeball[1-3]', 'eyeballs', 'align', 'alignpupils' and 'alignballs'

Examples

Python examle:

from reportlab.pdfgen import canvas
from reportlab_qr_code import qr_draw

def main():
        c = canvas.Canvas("py.pdf")
        qr_draw(c, "Hello world", x="1cm", y="1cm", size="19cm", bg="#eeeeee")
        c.showPage()
        c.save()

if __name__ == "__main__":
        main()

RML document example:

<!DOCTYPE document SYSTEM "rml_1_0.dtd" [
<!ENTITY lines5 "
        0cm 0cm 0cm 0.5cm
        0cm 0cm 0.5cm 0cm
        5cm 0cm 4.5cm 0cm
        5cm 0cm 5cm 0.5cm
        0cm 5cm 0.5cm 5cm
        0cm 5cm 0cm 4.5cm
        5cm 5cm 5cm 4.5cm
        5cm 5cm 4.5cm 5cm
">
<!ENTITY lines3 "
        0cm 0cm 0cm 0.5cm
        0cm 0cm 0.5cm 0cm
        3cm 0cm 2.5cm 0cm
        3cm 0cm 3cm 0.5cm
        0cm 3cm 0.5cm 3cm
        0cm 3cm 0cm 2.5cm
        3cm 3cm 3cm 2.5cm
        3cm 3cm 2.5cm 3cm
">
]>
<document filename="test.pdf" invariant="1" compression="1">
<template>
        <pageTemplate id="main" pagesize="17cm,39cm">
                <frame id="main" x1="0.5cm" y1="0.0cm" width="5cm" height="39cm"/>
                <frame id="main" x1="6cm" y1="0.0cm" width="5cm" height="39cm"/>
                <frame id="main" x1="11.5cm" y1="0.0cm" width="5cm" height="39cm"/>
        </pageTemplate>
</template>
<stylesheet>
        <paraStyle name="Normal" fontSize="12" leading="16" spaceBefore="16" />
</stylesheet>
<story>

        <para style="Normal">Simple text </para>
        <illustration height="5cm" width="5cm" align="center">
                <plugInGraphic module="reportlab_qr_code" function="qr">;text;Simple text</plugInGraphic>
                <lineMode width="0.5" /><lines>&lines5;</lines>
        </illustration>

        <condPageBreak height="7cm"/>

        <para>Custom size</para>
        <illustration height="3cm" width="3cm" align="center">
                <plugInGraphic module="reportlab_qr_code" function="qr">size=3cm;text;Custom size</plugInGraphic>
                <lineMode width="0.5" /><lines>&lines3;</lines>
        </illustration>

        <condPageBreak height="7cm"/>

        <para>Base 64 encoded</para>
        <illustration height="5cm" width="5cm" align="center">
                <plugInGraphic module="reportlab_qr_code" function="qr">;base64;QmFzZSA2NCBlbmNvZGVk</plugInGraphic>
                <lineMode width="0.5" /><lines>&lines5;</lines>
        </illustration>

        <condPageBreak height="7cm"/>

        <para>Custom colors</para>
        <illustration height="5cm" width="5cm" align="center">
                <plugInGraphic module="reportlab_qr_code" function="qr">bg=#eeeeee,fg=#a00000;text;Custom colors</plugInGraphic>
                <lineMode width="0.5" /><lines>&lines5;</lines>
        </illustration>

        <condPageBreak height="7cm"/>

        <para>Padding 20%</para>
        <illustration height="5cm" width="5cm" align="center">
                <plugInGraphic module="reportlab_qr_code" function="qr">padding=20%;text;Padding 20%</plugInGraphic>
                <lineMode width="0.5" /><lines>&lines5;</lines>
        </illustration>

        <condPageBreak height="7cm"/>

        <para>Padding 1cm</para>
        <illustration height="5cm" width="5cm" align="center">
                <plugInGraphic module="reportlab_qr_code" function="qr">padding=1cm;text;Padding 1cm</plugInGraphic>
                <lineMode width="0.5" /><lines>&lines5;</lines>
        </illustration>

        <condPageBreak height="7cm"/>

        <para>Padding 1 pixel</para>
        <illustration height="5cm" width="5cm" align="center">
                <plugInGraphic module="reportlab_qr_code" function="qr">padding=1;text;Padding 1 pixel</plugInGraphic>
                <lineMode width="0.5" /><lines>&lines5;</lines>
        </illustration>

        <condPageBreak height="7cm"/>

        <para>Error correction M</para>
        <illustration height="5cm" width="5cm" align="center">
                <plugInGraphic module="reportlab_qr_code" function="qr">error_correction=M;text;Error correction</plugInGraphic>
                <lineMode width="0.5" /><lines>&lines5;</lines>
        </illustration>

        <condPageBreak height="7cm"/>

        <para>Error correction L</para>
        <illustration height="5cm" width="5cm" align="center">
                <plugInGraphic module="reportlab_qr_code" function="qr">error_correction=L;text;Error correction</plugInGraphic>
                <lineMode width="0.5" /><lines>&lines5;</lines>
        </illustration>

        <condPageBreak height="7cm"/>

        <para>Version 10</para>
        <illustration height="5cm" width="5cm" align="center">
                <plugInGraphic module="reportlab_qr_code" function="qr">version=10;text;Version 10</plugInGraphic>
                <lineMode width="0.5" /><lines>&lines5;</lines>
        </illustration>

        <condPageBreak height="7cm"/>

        <para style="Normal">Small radius</para>
        <illustration height="5cm" width="5cm" align="center">
                <plugInGraphic module="reportlab_qr_code" function="qr">radius=0.5;text;Small radius</plugInGraphic>
                <lineMode width="0.5" /><lines>&lines5;</lines>
        </illustration>

        <condPageBreak height="7cm"/>

        <para style="Normal">Round with better path</para>
        <illustration height="5cm" width="5cm" align="center">
                <plugInGraphic module="reportlab_qr_code" function="qr">radius=0.5,enhanced_path=1;text;ROUND WITH BETTER PATH</plugInGraphic>
                <lineMode width="0.5" /><lines>&lines5;</lines>
        </illustration>

        <condPageBreak height="7cm"/>

        <para style="Normal">Large radius</para>
        <illustration height="5cm" width="5cm" align="center">
                <plugInGraphic module="reportlab_qr_code" function="qr">radius=3.5;text;Large radius</plugInGraphic>
                <lineMode width="0.5" /><lines>&lines5;</lines>
        </illustration>

        <condPageBreak height="7cm"/>

        <para>Inverted</para>
        <illustration height="5cm" width="5cm" align="center">
                <plugInGraphic baseDir="." module="utils" function="gradient" />
                <plugInGraphic module="reportlab_qr_code" function="qr">padding=0,fg=#ffffff,invert=1;text;Inverted</plugInGraphic>
                <lineMode width="2" />
                <stroke color="#ffffff" />
                <rect x="0" y="0" width="5cm" height="5cm" fill="0" stroke="1" />
        </illustration>

        <condPageBreak height="7cm"/>

        <para>Mask</para>
        <illustration height="5cm" width="5cm" align="center">
                <lineMode width="0.5" /><lines>&lines5;</lines>
                <plugInGraphic module="reportlab_qr_code" function="qr">mask=1,radius=0.5,enhanced_path=1;text;Mask</plugInGraphic>
                <plugInGraphic baseDir="." module="utils" function="gradient" />
        </illustration>

        <condPageBreak height="7cm"/>

        <para style="Normal">Hole</para>
        <illustration height="5cm" width="5cm" align="center">
                <plugInGraphic module="reportlab_qr_code" function="qr">hole=20%:40%:60%:20%,error_correction=H,radius=0.3,enhanced_path=1;text;Hole inside QR code</plugInGraphic>
                <setFont name="Helvetica" size="18"/>
                <drawString x="1.8cm" y="2.35cm">Logo</drawString>
                <lineMode width="0.5" /><lines>&lines5;</lines>
        </illustration>

        <condPageBreak height="7cm"/>

        <para style="Normal">Logo</para>
        <illustration height="5cm" width="5cm" align="center">
                <plugInGraphic module="reportlab_qr_code" function="qr">padding=2,radius=0.5,hole=35%:35%:30%:30%,fg=#554488,error_correction=H,draw=all-align-eyes,draw=alignpupils,radius=0.25,draw=alignballs,fg=#e24329,radius=1,draw=eyeball2+eyeball3,radius=3.5,fg=#fca326,draw=eyeball1,radius=3.5,fg=#e24329,draw=eyepupils,fg=#44366d,radius=3.5;text;https://about.gitlab.com/</plugInGraphic>
                <lineMode width="0.5" /><lines>&lines5;</lines>
                <image file="gitlab.svg" x="1.8cm" y="1.8cm" width="1.4cm" height="1.4cm"/>
        </illustration>
</story>
</document>

Output: