65 lines
2 KiB
Python
65 lines
2 KiB
Python
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#!/usr/bin/env python3
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# make_text_invisible.py
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# Usage: python make_text_invisible.py text.pdf out.pdf
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# Produces a single-page PDF identical visually but with text made invisible (selectable/searchable).
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# Requires: pip install pymupdf
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import sys
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import fitz # pymupdf
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import os
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if len(sys.argv) != 4:
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print("Usage: python make_text_invisible.py text.pdf sig.png out.pdf", file=sys.stderr)
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sys.exit(2)
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in_path, sig_path, out_path = sys.argv[1], sys.argv[2], sys.argv[3]
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doc = fitz.open(in_path)
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if doc.page_count < 1:
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print("Input has no pages", file=sys.stderr)
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sys.exit(1)
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# operate only on first page (single-page input assumed)
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page = doc.load_page(0)
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w, h = page.rect.width, page.rect.height
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# create new doc and a blank page with same size
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out = fitz.open()
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newp = out.new_page(width=w, height=h)
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# # copy original page's visible content as an image to preserve exact appearance
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# pix = page.get_pixmap(matrix=fitz.Matrix(1, 1), alpha=False)
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# img_bytes = pix.tobytes("png")
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# newp.insert_image(fitz.Rect(0, 0, w, h), stream=img_bytes)
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newp.insert_image(newp.rect, filename=sig_path, keep_proportion=False)
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# extract text spans (positions, fonts, sizes)
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td = page.get_text("dict")
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for block in td.get("blocks", []):
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for line in block.get("lines", []):
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for span in line.get("spans", []):
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txt = span.get("text", "")
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if not txt:
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continue
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origin = span.get("origin")
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if origin:
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x, y = origin[0], origin[1]
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else:
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bbox = span.get("bbox", [0,0,0,0])
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x, y = bbox[0], bbox[3]
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# Use PDF invisible text rendering: render_mode=3 (neither fill nor stroke) is invisible but selectable.
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try:
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size = span.get("size", 12)
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newp.insert_text((x, y), txt, fontsize=size, color=(0, 0, 0, 0), render_mode=3)
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except Exception:
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print(f"Failed to insert text: '{txt}'")
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out.save(out_path, garbage=4, deflate=True)
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out.close()
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doc.close()
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