/usr/share/compiz/imgjpeg.xml is in compiz-plugins 1:0.9.13.1+18.04.20180302-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | <?xml version="1.0" encoding="UTF-8"?>
<compiz>
<plugin useBcop="true" name="imgjpeg">
<short>JPEG</short>
<long>JPEG image format plugin</long>
<category>Image Loading</category>
<feature>imageext:jpeg</feature>
<feature>imageext:jpg</feature>
<feature>imagemime:image/jpeg</feature>
<deps>
<relation type="after">
<plugin>composite</plugin>
<plugin>opengl</plugin>
</relation>
</deps>
<options>
<option type="int" name="quality">
<short>Compression Quality</short>
<long>Quality of compression when saving JPEG images</long>
<default>80</default>
<min>0</min>
<max>100</max>
</option>
</options>
</plugin>
</compiz>
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