PyMuPDF insert image at bottom

Question

I'm trying to read a PDF and insert an image at bottom(Footer) of each page in PDF. I've tried with PyMuPDF library.

Problem: Whatever the Rect (height, width) I give, it doesn't appear in the bottom, image keeps appearing only on the top half of the page (PDF page).

My code:

from fitz import fitz, Rect

doc = fitz.open("test_pdf2.pdf")

def add_footer(pdf):
    img = open("footer4.jpg", "rb").read()
    rect = Rect(0, 0, 570, 1230)

    for i in range(0, pdf.pageCount):
        page = pdf[i]
        if not page._isWrapped:
            page._wrapContents()
        page.insertImage(rect, stream=img)

add_footer(doc)
doc.save('test_pdf5.pdf')

Processed_image with footer image in the middle of the page: https://i.stack.imgur.com/HK9mm.png

Footer image: https://i.stack.imgur.com/FRQYE.jpg

Please help!

Please let me know if this can be achieved by using any other library.

Answer 1

After doing little trial and error I was able to figure out the problem. I was missing out on proper dimensions of Rect, I had to give 0.85*h in second parameter. below is the code:

from fitz import fitz, Rect

doc = fitz.open("test_pdf2.pdf")
w = 595
h = 842

def add_footer(pdf):
    img = open("footer4.jpg", "rb").read()
    rect = fitz.Rect(0, 0.85*h, w, h)

    for i in range(0, pdf.pageCount):
        page = pdf[i]
        if not page._isWrapped:
            page._wrapContents()
        page.insertImage(rect, stream=img)

add_footer(doc)
doc.save('test_pdf5.pdf')  

Answer 2

Some pages internally change the standard PDF geometry (which uses the bottom-left page point as (0, 0)) to something else, and at the same time do not encapsulate this doing properly as they should.

If you suspect this, use PyMuPDF methods to encapsulate the current page /Contents before you insert your items (text, images, etc.).

The easiest way is Page._wrapContents() which is also the friendly way to keep incremental PDF saves small. The MuPDF provided Page.cleanContents() does this and a lot more cleaning stuff, but bloats the incremental save delta, if this is a concern.

Answer 3

use:

wrapContents – Page.wrap_contents()

https://pymupdf.readthedocs.io/en/latest/znames.html?highlight=wrapContents

---

from fitz import fitz, Rect

doc = fitz.open("example.pdf")
w = 250
h = 400

def add_footer(pdf):
    img = open("firmaJG.png", "rb").read()
    rect = fitz.Rect(0, 0.85*h, w, h)

    for i in range(0, pdf.pageCount):
        page = pdf[i]
        if not page._isWrapped:
            page.wrap_contents()
        page.insertImage(rect, stream=img)

add_footer(doc)
doc.save('test_pdf5.pdf')