43 lines
1.7 KiB
Python
43 lines
1.7 KiB
Python
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#!/usr/bin/env python3
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#
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# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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#
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# Diffs two PDF pages: a reference and our own output. Red output means some to fix: the amount of
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# red is meant to reduce as fixing progresses. Sample usage:
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#
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# bin/diff-pdf-page.py reference.pdf test.pdf diff.png
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import argparse
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import tempfile
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import subprocess
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def run(argv):
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print(" ".join(argv))
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subprocess.run(argv, check=True)
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def main():
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parser = argparse.ArgumentParser(description="Diffs two PDF pages, first is painted red instead of black, the second is painted on top of the first.")
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parser.add_argument("-d", "--density", default="384")
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parser.add_argument("-p", "--page", default="0")
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parser.add_argument("a_pdf")
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parser.add_argument("b_pdf")
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parser.add_argument("diff_png")
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args = parser.parse_args()
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a_png = tempfile.NamedTemporaryFile(suffix=".png")
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a_pdf = args.a_pdf + "[" + args.page + "]"
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run(["convert", "-density", args.density, a_pdf, "-colorspace", "RGB", "-fuzz", "95%", "-fill", "red", "-opaque", "black", a_png.name])
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b_png = tempfile.NamedTemporaryFile(suffix=".png")
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b_pdf = args.b_pdf + "[" + args.page + "]"
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run(["convert", "-density", args.density, b_pdf, "-colorspace", "RGB", b_png.name])
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composite_png = tempfile.NamedTemporaryFile(suffix=".png")
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run(["convert", "-composite", a_png.name, b_png.name, composite_png.name])
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run(["convert", composite_png.name, "-background", "white", "-flatten", args.diff_png])
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if __name__ == "__main__":
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main()
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# vim:set shiftwidth=4 softtabstop=4 expandtab:
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