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#!/usr/bin/env python
'''
usage: 4up.py my.pdf firstpage lastpage
Creates 4up.my.pdf
'''
import sys
import os
import find_pdfrw
from pdfrw import PdfReader, PdfWriter, PdfDict, PdfName, PdfArray
from pdfrw.buildxobj import pagexobj
def get4(allpages):
# Pull a maximum of 4 pages off the list
pages = [pagexobj(x) for x in allpages[:4]]
del allpages[:4]
x_max = max(page.BBox[2] for page in pages)
y_max = max(page.BBox[3] for page in pages)
stream = []
xobjdict = PdfDict()
for index, page in enumerate(pages):
x = x_max * (index & 1) / 2.0
y = y_max * (index <= 1) / 2.0
index = '/P%s' % index
stream.append('q 0.5 0 0 0.5 %s %s cm %s Do Q\n' % (x, y, index))
xobjdict[index] = page
return PdfDict(
Type = PdfName.Page,
Contents = PdfDict(stream=''.join(stream)),
MediaBox = PdfArray([0, 0, x_max, y_max]),
Resources = PdfDict(XObject = xobjdict),
)
def go(inpfn, outfn):
pages = PdfReader(inpfn).pages
writer = PdfWriter()
while pages:
writer.addpage(get4(pages))
writer.write(outfn)
if __name__ == '__main__':
inpfn, = sys.argv[1:]
outfn = '4up.' + os.path.basename(inpfn)
go(inpfn, outfn)
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