[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 Fri, 27 Mar 2009 10:10:34 +0000, KLEIN Stéphane a écrit :


> 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()



Now, I've another function to add some marges to page :


::


    PAGE_BOXES = ("/MediaBox", "/CropBox", "/BleedBox", "/TrimBox", "/
ArtBox")

    def add_marges(page, top, right, bottom, left):
        for boxname in PAGE_BOXES:
            if not page.get(boxname):
                continue
            box = pyPdf.pdf.getRectangle(page, boxname, None)
            box.upperRight = (
                float(box.upperRight[0]) + right + left,
                float(box.upperRight[1]) + top + bottom
            )
        translate_pdf_page(page, left, bottom)

I can add some marging (the size) to bg_page0, example :


::


    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 )

    add_marges(bg_page0, 20 *mm, 20*mm, 10 * mm,  10 * mm)

    output.addPage(bg_page0)

    output.write(outputStream)
    outputStream.close()

Regards,
Stephane