[reportlab-users] [PyPDF] I would like merge two A4 PDF documents in PDF document with A4 size + 10 mm (width + 10mm, height + 10mm)

[KLEIN Stéphane]

Le Thu, 26 Mar 2009 15:51:02 +0000, KLEIN Stéphane a écrit :


> Hi,

> 

> To summarize, with PyPDF package, I would like merge two A4 PDF

> documents in PDF document with A4 size + 10 mm (width + 10mm, height +

> 10mm).

> 

> First, I merge two PDF pages with this code :

> 

> ::

> 

>     outputStream = file("output.pdf", "w") output = PdfFileWriter()

> 

>     background_pages = PdfFileReader(file("background.pdf", "rb"))

>     foreground_pages = PdfFileReader(file("foreground.pdf", "rb"))

> 

>     bg_page0 = background_pages.getPage(0) fg_page0 =

>     foreground_pages.getPage(0)

> 

>     bg_page0.mergePage( fg_page0 )

> 

>     output.addPage(page0)

> 

>     output.write(outputStream)

>     outputStream.close()

> 

> This works greatly.

> 

> Background and foreground PDF documents size are A4 (paper size).

> 

> From this point, I would like :

> 

> 1. create an empty page with this paper size : A4 width + 10 mm, A4

> height + 10 mm

> 2. merge and center background page in current page (page create at step

> 1)

> 3. merge and center foreground page

> 

> I don't know :

> 

> * how to change page size ?

> * how to merge and center page ?


I found a solution to "translate" a page :


::


    from reportlab.lib.units import mm
    import pyPdf

    def translate_pdf_page(page, delta_x, delta_y):
        content = pyPdf.pdf.ContentStream(page["/Contents"].getObject(), 
page.pdf)
        content.operations.insert(0, [[], '1 0 0 1 %s %s cm' %
(delta_x,delta_y)] )
        page[pyPdf.generic.NameObject('/Contents')] = content

    outputStream = file("output.pdf", "w") 
    output = pyPdf.pdf.PdfFileWriter()

    background_pages = pyPdf.pdf.PdfFileReader(file("background.pdf", 
"rb"))
    foreground_pages = pyPdf.pdf.PdfFileReader(file("foreground.pdf", 
"rb"))

    bg_page0 = background_pages.getPage(0) 
    fg_page0 = foreground_pages.getPage(0)

    translate_pdf_page(fg_page0, 5 * mm, 5 * mm)

    bg_page0.mergePage( fg_page0 )

    output.addPage(bg_page0)

    output.write(outputStream)
    outputStream.close()

Regards,
Stephane