doc: use sphinxcontrib.rsvgconverter to converts SVGs for latex docs

Building latex docs currently fails because SVGs are not supported.
Use the sphinxcontrib.rsvgconverter extension to convert them to pdfs
first.

Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>

1 files changed, 7 insertions, 0 deletions

diff --git a/doc/conf.py b/doc/conf.py
index 3e53aa4db..9e32c546e 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -33,6 +33,13 @@ import fileinput
 # ones.
 extensions = []
 
+def add_latex_extensions(app, docname, source):
+    if app.builder.name == 'latex':
+        app.setup_extension('sphinxcontrib.rsvgconverter')
+
+def setup(app):
+    app.connect('source-read', add_latex_extensions)
+
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']