2008-09-10 23:32

Using vector images in reportlab

One of the big limitations of reportlab is that it has no support for vector-based images. You can't insert SVG, EPS or any other vector-based format in your documents.

Until now.

By hijacking another app called uniconvertor, I have managed to insert as vectors SVG images in a reportlab document.

Here's the hackish code:

import sys,os
from app.io import load
from app.plugins import plugins
import app
from reportlab.platypus import *
from reportlab.lib.styles import getSampleStyleSheet
from reportlab.lib.units import inch


class SVGImage(Flowable):
  def __init__(self,imgname):
    self.doc = load.load_drawing(imgname)
    for k in dir(self.doc):
      print k
    self.saver = plugins.find_export_plugin(plugins.guess_export_plugin(".pdf"))

  def wrap(self,aW,aH):
    return br[2],br[3]

  def drawOn(self,canv,x,y,_sW=0):
    self.saver (self.doc,".ignoreme.pdf",options={'pdfgen_canvas':canv})

styles = getSampleStyleSheet()
def go():
    doc = SimpleDocTemplate("phello.pdf")
    Story = [Spacer(1,2*inch)]
    style = styles["Normal"]
    p = SVGImage('warning.svg')


It has several problems (see where the second paragraph ended), but it does work.

To run it, you need a warning.svg file (edit as needed) and you run it this way (replacing the path as proper for your setup):

PYTHONPATH=/usr/lib/python2.5/site-packages/uniconvertor/ python use_uniconv.py

In fact, this is not limited to SVG files. You should be able to use the following formats:

  • CorelDRAW ver.7-X3,X4 (CDR/CDT/CCX/CDRX/CMX)
  • Adobe Illustrator up to 9 ver. (AI postscript based)
  • Postscript (PS)
  • Encapsulated Postscript (EPS)
  • Computer Graphics Metafile (CGM)
  • Windows Metafile (WMF)
  • XFIG
  • Scalable Vector Graphics (SVG)
  • Skencil/Sketch/sK1 (SK and SK1)
  • Acorn Draw (AFF)


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