show_pdf_page overlays page on wrong bbox

[PasaOpasen]

I am trying to overlay the page with only image with page with only text. Next function works well in many cases:

import fitz

def overlay_pdfs(empty_path: str, only_text_path: str, merge_result_path: str):

    with fitz.open(only_text_path) as doc_text:
        with fitz.open(empty_path) as doc_background:
            for i in range(doc_background.page_count):
                page_back = doc_background.load_page(i)
                rot = page_back.rotation
                rect = page_back.rect
                if rot % 180 != 0:
                    rect[2], rect[3] = rect[3], rect[2]

                page_back.show_pdf_page(
                    rect, doc_text,
                    pno=i, keep_proportion=True,
                    overlay=True, oc=0,
                    rotate=rot,
                    clip=None
                )

            doc_background.ez_save(
                merge_result_path,
                encryption=fitz.PDF_ENCRYPT_KEEP,
                deflate_fonts=True
            )

But for certain pair of docs with equal sizes it shifts and resizes text page part (show only a part cuz of privacy):

I send this docs to [email protected]

To reproduce:

overlay_pdfs('only_image.pdf', 'only_text.pdf', 'result.pdf')

Notes: I think the problem is related to image document wrong page rotation meta (270), but reset rotation will rotate the document instead of setting rotation angle to 0 in metadata

[JorjMcKie]

I just responded via e-mail.
The following approach does the trick in this case:

1. Make a new PDF
2. Make a new page in new PDF having the rectangle of base PDF page with the same number.
3. De-rotate base PDF page and insert it with negated original rotation. This will make the new page look like the original.
4. Insert the page with overlay text on top like normal.

[PasaOpasen]

Thank u for your response! Everything works well, so finally I use this implementation:

def overlay_pdfs(empty_path: str, only_text_path: str, merge_result_path: str):

    with fitz.open(only_text_path) as doc_text:
        with fitz.open(empty_path) as doc_background:

            doc = fitz.open()

            for i in range(doc_background.page_count):
                page_back = doc_background.load_page(i)

                rot = page_back.rotation
                rect = page_back.rect
                w, h = rect.br

                page_back.set_rotation(0)
                new_page = doc.new_page(width=w, height=h)
                new_page.show_pdf_page(new_page.rect, doc_background, new_page.number, rotate=-rot)
                new_page.show_pdf_page(new_page.rect, doc_text, new_page.number, rotate=0)

            doc.ez_save(
                merge_result_path,
                encryption=fitz.PDF_ENCRYPT_KEEP,
                deflate_fonts=True,
                pretty=True
            )