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