bin/diff-pdf-page.py | 42 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 42 insertions(+)
New commits:
commit e42b7ab0c796f5b2a985cdac56b1c342c5501984
Author: Miklos Vajna <vmik...@collabora.com>
AuthorDate: Tue Jun 4 16:14:15 2024 +0200
Commit: Miklos Vajna <vmik...@collabora.com>
CommitDate: Tue Jun 4 17:27:40 2024 +0200
bin: add a diff-pdf-page.py script to diff reference vs our rendering via
PDF
Thanks László Németh for the idea, the mechanism used in the tool was
also used to generate the visual diff visible at
<https://wiki.documentfoundation.org/ReleaseNotes/24.2#New_line_break_algorithm_for_interoperability>.
Change-Id: I51afb08c60c7134f75a54acdb94b49d2ff94befd
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/168404
Reviewed-by: Miklos Vajna <vmik...@collabora.com>
Tested-by: Jenkins
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:
