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docs/doc-guide: Add footnote on Inkscape for better images in PDF documents

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With kernel releases v5.18 and later, if you have Inkscape, images
embedded in PDF documents are of vector graphics, not the raster
images as are the case with pre-v5.18 releases.
Even with pre-5.18 releases, having Inkscape would improve images
converted from some of SVG files which are not fully covered by the
limited capability of rsvg-convert(1) [1].

Add a footnote mentioning the expected improvements of such images.

Link: https://gitlab.gnome.org/GNOME/librsvg#non-goals-of-librsvg [1]
Signed-off-by: Akira Yokosawa <akiyks@gmail.com>
Link: https://lore.kernel.org/r/81cddbde-bc28-bec1-fca4-3c8fe2df502f@gmail.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Akira Yokosawa 2022-06-09 22:23:27 +09:00 committed by Jonathan Corbet
parent 8206361063
commit 7c43214ddd
1 changed files with 6 additions and 1 deletions
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7
Documentation/doc-guide/sphinx.rst
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@ -132,7 +132,8 @@ format-specific subdirectories under ``Documentation/output``.
To generate documentation, Sphinx (``sphinx-build``) must obviously be
installed. For prettier HTML output, the Read the Docs Sphinx theme
(``sphinx_rtd_theme``) is used if available. For PDF output you'll also need
``XeLaTeX`` and ``convert(1)`` from ImageMagick (https://www.imagemagick.org).
``XeLaTeX`` and ``convert(1)`` from ImageMagick
(https://www.imagemagick.org).\ [#ink]_
All of these are widely available and packaged in distributions.
To pass extra options to Sphinx, you can use the ``SPHINXOPTS`` make
@ -152,6 +153,10 @@ The Sphinx theme can be overridden by using the ``DOCS_THEME`` make variable.
To remove the generated documentation, run ``make cleandocs``.
.. [#ink] Having ``inkscape(1)`` from Inkscape (https://inkscape.org)
as well would improve the quality of images embedded in PDF
documents, especially for kernel releases 5.18 and later.
Writing Documentation
=====================