Things I learned publishing a magazine

Today at 00:00:00 GMT-3 PET: Python entre todos was indeed launched, in time (arbitrary but forced) and in budget ($0).

So, what did I learn? I learned a lot!

  • The only thing you need to publish an e-mag is time and content.
  • Time can be converted into content, but if you write everything yourself it's a blog, not a magazine. Luckily, PET found great contributors.
  • If you want utilitarian design, rst2pdf can do the job
  • In fact, it can do it better than other tools in some ways
    • I can push a fixed version of the PDFs in 5 minutes for all layouts. How much would it take me using Scribus or other DTP? In a magazine where correctness matters, that's a big deal.
    • TOCs are better than in most amateur PDF magazines I've seen. The in-content-TOC is clickable, and the PDF TOC is perfect.
    • Page numbers in the PDF TOC make sense (no, the cover is not page 1)
    • I am producing 6 PDF versions: A4(bw, colour), A5(bw,colour), Booklet(bw, colour) and I could add any other I want in a few minutes.
  • I learned about PDF imposition!

Let's explain the last one:

Suppose you want to print a small booklet, and you have 32 pages of content. How do you do that?

The easiest way is to print it 2-up double-sided in A4 paper so that you can stack the pages, fold them down the middle, staple them, and get a nice A5 booklet.

The problem is that the page ordering is hard to get right. For example, for a 4-page booklet, you need to print one A4 page with pages 4-1 on one side and 2-3 on the other. For an 8 page booklet it's 8-1,2-7,3-6,4-5.

Lucklily there's a way to get this done automatically:

1. Install podofo 3. Get booklet-A4.plan (see below) 2. Run this:

podofoimpose my-A5-pages.pdf my-booklet.pdf booklet-A4.plan lua

booklet-A4.plan is this:

---Generic Booklet (A4)
---
---It is said generic as it will try to determine
---automatically how to fit the booklet onto A4
---paper sheets, scaling pages if necessary.
---it is well suited for office documents for
---which you do not care too much about resulting
---imposition artefacts since it manages to save
---paper!
---
-- print("Booklet")
-- We output an A4 booklet
PageWidth = 595.27559
PageHeight = 841.88976

print("PageCount",PageCount)

-- We assume that H > W
-- Argh, we now can do better since we have "if" ;-)
-- Scale = PageHeight / (2*SourceWidth)
if(SourceWidth <= SourceHeight)
then
--  If you A5 pages are not really A5, uncomment the next line
--  Scale = PageHeight / (2*SourceWidth)
    Scale = 1
    rot = 90
        xof = SourceHeight
        yofRA = 0
        yofRB = SourceWidth
        yofVA = 0
        yofVB = SourceWidth
else
--  If you A5 pages are not really A5, uncomment the next line
--  Scale = PageHeight / (2*SourceHeight)
    Scale = 1
    rot = 0
        xof = 0;
        yofRA = 0
        yofRB = SourceHeight
        yofVA = SourceHeight
        yofVB = 0
end

do
    rest = PageCount % 4
    totp = PageCount
    if rest ~= 0
        then
        totp = totp + ( 4 - rest)
        end
    inc = 0
    count = 0
    imax = totp/4
    while count < imax
        do
--          We assume that podofoimpose will discard invalid records
--          such as those with source page greater than PageCount
--          print(totp, inc, rot, xof,yofRA, yofRA, yofVA, yofVB)
-- Recto
        PushRecord(totp - inc , inc + 1 , rot, xof , yofRA)
        PushRecord(inc + 1 , inc + 1 , rot, xof , yofRB)
-- Verso
        PushRecord(inc + 2 , inc + 2 , rot, xof , yofVA)
        PushRecord(totp-(inc + 1) , inc + 2 , rot, xof, yofVB)

        count = count + 1
        inc = inc + 2
        end
end

That code is taken from here: http://www.oep-h.com/impose/

And voilá, you get a scrambled PDF with the pages in exactly the right order (and empty pages added as needed).

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