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cc8c708295
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fb9537d8b7 |
2 changed files with 50 additions and 3 deletions
39
HACKING
39
HACKING
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@ -27,6 +27,41 @@ Making a new release
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- Build and upload to pypi:
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$ rm dist/*
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$ rm -rf dist/*
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$ python3 setup.py sdist
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$ twine upload --sign dist/*
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$ twine upload dist/*
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Using debbisect to find regressions
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-----------------------------------
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$ debbisect --cache=./cache --depends="git,ca-certificates,python3,
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ghostscript,imagemagick,mupdf-tools,poppler-utils,python3-pil,
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python3-pytest,python3-numpy,python3-scipy,python3-pikepdf" \
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--verbose 2023-09-16 2023-10-24 \
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'chroot "$1" sh -c "
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git clone https://gitlab.mister-muffin.de/josch/img2pdf.git
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&& cd img2pdf
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&& pytest 'src/img2pdf_test.py::test_jpg_2000_rgba8[internal]"'
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Using debbisect cache
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---------------------
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$ mmdebstrap --variant=apt --aptopt='Acquire::Check-Valid-Until "false"' \
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--include=git,ca-certificates,python3,ghostscript,imagemagick \
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--include=mupdf-tools,poppler-utils,python3-pil,python3-pytest \
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--include=python3-numpy,python3-scipy,python3-pikepdf \
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--hook-dir=/usr/share/mmdebstrap/hooks/file-mirror-automount \
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--setup-hook='mkdir -p "$1/home/josch/git/devscripts/cache/pool/"' \
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--setup-hook='mount -o ro,bind /home/josch/git/devscripts/cache/pool/ "$1/home/josch/git/devscripts/cache/pool/"' \
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--chrooted-customize-hook=bash
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unstable /dev/null
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file:///home/josch/git/devscripts/cache/archive/debian/20231022T090139Z/
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Bisecting imagemagick
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---------------------
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$ git clean -fdx && git reset --hard
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$ ./configure --prefix=$(pwd)/prefix
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$ make -j$(nproc)
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$ make install
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$ LD_LIBRARY_PATH=$(pwd)/prefix/lib prefix/bin/compare ...
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@ -1311,7 +1311,19 @@ def get_imgmetadata(
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else:
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imgwidthpx, imgheightpx = imgdata.size
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ndpi = imgdata.info.get("dpi", (default_dpi, default_dpi))
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ndpi = imgdata.info.get("dpi")
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if ndpi is None:
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# the PNG plugin of PIL adds the undocumented "aspect" field instead of
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# the "dpi" field if the PNG pHYs chunk unit is not set to meters
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if imgformat == ImageFormat.PNG and imgdata.info.get("aspect") is not None:
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aspect = imgdata.info["aspect"]
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# make sure not to go below the default dpi
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if aspect[0] > aspect[1]:
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ndpi = (default_dpi * aspect[0] / aspect[1], default_dpi)
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else:
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ndpi = (default_dpi, default_dpi * aspect[1] / aspect[0])
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else:
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ndpi = (default_dpi, default_dpi)
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# In python3, the returned dpi value for some tiff images will
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# not be an integer but a float. To make the behaviour of
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# img2pdf the same between python2 and python3, we convert that
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