Modifying found watermark properties Leave feedback
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GroupDocs.Watermark lets you replace the text or image of watermarks that already exist in a document. Search for the watermarks first, then assign a new value to each match.
The example below opens a document that contains a “CONFIDENTIAL” watermark, finds it, and replaces the text with “APPROVED”.
from groupdocs.watermark import Watermarker
from groupdocs.watermark.search.search_criteria import TextSearchCriteria
def modify_watermark():
with Watermarker("./watermarked-document.pdf") as watermarker:
possible = watermarker.search(TextSearchCriteria("CONFIDENTIAL"))
for wm in possible:
try:
wm.text = "APPROVED"
except Exception:
# The entity may not support text editing, or the value is invalid
pass
watermarker.save("./output.pdf")
if __name__ == "__main__":
modify_watermark()
watermarked-document.pdf is the sample file used in this example. Click here to download it.
Binary file (PDF, 479 KB)
Use formatted_text_fragments to replace the text with styled fragments — choose the font, foreground color, and background color.
from groupdocs.watermark import Watermarker
from groupdocs.watermark.watermarks import Font, FontStyle, Color
from groupdocs.watermark.search.search_criteria import TextSearchCriteria
def modify_watermark_with_formatting():
with Watermarker("./watermarked-document.pdf") as watermarker:
possible = watermarker.search(TextSearchCriteria("CONFIDENTIAL"))
for wm in possible:
try:
wm.formatted_text_fragments.clear()
wm.formatted_text_fragments.add(
"APPROVED",
Font("Calibri", 19.0, FontStyle.BOLD),
Color.red,
Color.aqua,
)
except Exception:
# The entity may not support formatted text, or values may be invalid
pass
watermarker.save("./output.pdf")
if __name__ == "__main__":
modify_watermark_with_formatting()
watermarked-document.pdf is the sample file used in this example. Click here to download it.
Binary file (PDF, 662 KB)
Swap the image data of matched watermarks by assigning new bytes to image_data.
from groupdocs.watermark import Watermarker
from groupdocs.watermark.search.search_criteria import ImageDctHashSearchCriteria
def replace_watermark_image():
with open("./stamp.png", "rb") as f:
image_data = f.read()
with Watermarker("./watermarked-document.docx") as watermarker:
criteria = ImageDctHashSearchCriteria("./logo.png")
criteria.max_difference = 0.9
possible = watermarker.search(criteria)
for wm in possible:
try:
wm.image_data = image_data
except Exception:
# The entity may not support image replacement, or the image format is invalid
pass
watermarker.save("./output.docx")
if __name__ == "__main__":
replace_watermark_image()
watermarked-document.docx, logo.png, and stamp.png are the sample files used in this example. Download watermarked-document.docx, logo.png, and stamp.png.
Binary file (DOCX, 18 KB)
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