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#!/usr/bin/env python
'''
usage: booklet.py my.pdf
Uses Form XObjects and reportlab to create booklet.my.pdf.
Demonstrates use of pdfrw with reportlab.
'''
import sys
import os
from reportlab.pdfgen.canvas import Canvas
import find_pdfrw
from pdfrw import PdfReader
from pdfrw.buildxobj import pagexobj
from pdfrw.toreportlab import makerl
def read_and_double(inpfn):
pages = PdfReader(inpfn).pages
pages = [pagexobj(x) for x in pages]
if len(pages) & 1:
pages.append(pages[0]) # Sentinel -- get same size for back as front
xobjs = []
while len(pages) > 2:
xobjs.append((pages.pop(), pages.pop(0)))
xobjs.append((pages.pop(0), pages.pop()))
xobjs += [(x,) for x in pages]
return xobjs
def make_pdf(outfn, xobjpairs):
canvas = Canvas(outfn)
for xobjlist in xobjpairs:
x = y = 0
for xobj in xobjlist:
x += xobj.BBox[2]
y = max(y, xobj.BBox[3])
canvas.setPageSize((x,y))
# Handle blank back page
if len(xobjlist) > 1 and xobjlist[0] == xobjlist[-1]:
xobjlist = xobjlist[:1]
x = xobjlist[0].BBox[2]
else:
x = 0
y = 0
for xobj in xobjlist:
canvas.saveState()
canvas.translate(x, y)
canvas.doForm(makerl(canvas, xobj))
canvas.restoreState()
x += xobj.BBox[2]
canvas.showPage()
canvas.save()
inpfn, = sys.argv[1:]
outfn = 'booklet.' + os.path.basename(inpfn)
make_pdf(outfn, read_and_double(inpfn))
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