From e42b7ab0c796f5b2a985cdac56b1c342c5501984 Mon Sep 17 00:00:00 2001 From: Miklos Vajna Date: Tue, 4 Jun 2024 16:14:15 +0200 Subject: bin: add a diff-pdf-page.py script to diff reference vs our rendering via PDF MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Thanks László Németh for the idea, the mechanism used in the tool was also used to generate the visual diff visible at . Change-Id: I51afb08c60c7134f75a54acdb94b49d2ff94befd Reviewed-on: https://gerrit.libreoffice.org/c/core/+/168404 Reviewed-by: Miklos Vajna Tested-by: Jenkins --- bin/diff-pdf-page.py | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100755 bin/diff-pdf-page.py (limited to 'bin/diff-pdf-page.py') diff --git a/bin/diff-pdf-page.py b/bin/diff-pdf-page.py new file mode 100755 index 000000000000..153654d5d386 --- /dev/null +++ b/bin/diff-pdf-page.py @@ -0,0 +1,42 @@ +#!/usr/bin/env python3 +# +# This Source Code Form is subject to the terms of the Mozilla Public +# License, v. 2.0. If a copy of the MPL was not distributed with this +# file, You can obtain one at http://mozilla.org/MPL/2.0/. +# +# Diffs two PDF pages: a reference and our own output. Red output means some to fix: the amount of +# red is meant to reduce as fixing progresses. Sample usage: +# +# bin/diff-pdf-page.py reference.pdf test.pdf diff.png + +import argparse +import tempfile +import subprocess + +def run(argv): + print(" ".join(argv)) + subprocess.run(argv, check=True) + +def main(): + parser = argparse.ArgumentParser(description="Diffs two PDF pages, first is painted red instead of black, the second is painted on top of the first.") + parser.add_argument("-d", "--density", default="384") + parser.add_argument("-p", "--page", default="0") + parser.add_argument("a_pdf") + parser.add_argument("b_pdf") + parser.add_argument("diff_png") + args = parser.parse_args() + + a_png = tempfile.NamedTemporaryFile(suffix=".png") + a_pdf = args.a_pdf + "[" + args.page + "]" + run(["convert", "-density", args.density, a_pdf, "-colorspace", "RGB", "-fuzz", "95%", "-fill", "red", "-opaque", "black", a_png.name]) + b_png = tempfile.NamedTemporaryFile(suffix=".png") + b_pdf = args.b_pdf + "[" + args.page + "]" + run(["convert", "-density", args.density, b_pdf, "-colorspace", "RGB", b_png.name]) + composite_png = tempfile.NamedTemporaryFile(suffix=".png") + run(["convert", "-composite", a_png.name, b_png.name, composite_png.name]) + run(["convert", composite_png.name, "-background", "white", "-flatten", args.diff_png]) + +if __name__ == "__main__": + main() + +# vim:set shiftwidth=4 softtabstop=4 expandtab: -- cgit