doc: add a graphic illustrating pad vs tool support

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Jason Gerecke <jason.gerecke@wacom.com>
Reviewed-by: Carlos Garnacho <carlosg@gnome.org>

2 files changed, 327 insertions, 0 deletions

diff --git a/doc/svg/tablet-interfaces.svg b/doc/svg/tablet-interfaces.svg
new file mode 100644
index 00000000..d64fe9f3
--- /dev/null
+++ b/doc/svg/tablet-interfaces.svg
@@ -0,0 +1,325 @@
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diff --git a/doc/tablet-support.dox b/doc/tablet-support.dox
index 07de478b..0a44010b 100644
--- a/doc/tablet-support.dox
+++ b/doc/tablet-support.dox
@@ -23,6 +23,8 @@ Pad events do not require a tool to be in proximity. Note that both
 capabilities may exist on the same device though usually they are split
 across multiple kernel devices.
 
+@image html tablet-interfaces.svg "Difference between Pad and Tool buttons"
+
 Touch events on the tablet integrated into a screen itself are exposed
 through the @ref LIBINPUT_DEVICE_CAP_TOUCH capability. Touch events on a
 standalone tablet are exposed through the @ref LIBINPUT_DEVICE_CAP_POINTER