From dd80e623a066299c1e7b8e9f287090c2b12334cc Mon Sep 17 00:00:00 2001
From: Georges Basile Stavracas Neto <georges.stavracas@gmail.com>
Date: Sun, 5 Jul 2020 18:55:04 -0300
Subject: [PATCH] clutter/offscreen-effect: Document paint nodes

https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1355
---
 clutter/clutter/clutter-offscreen-effect.c | 24 ++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/clutter/clutter/clutter-offscreen-effect.c b/clutter/clutter/clutter-offscreen-effect.c
index 7be3056b3..7799dfd65 100644
--- a/clutter/clutter/clutter-offscreen-effect.c
+++ b/clutter/clutter/clutter-offscreen-effect.c
@@ -60,6 +60,30 @@
  * #ClutterOffscreenEffectClass.create_texture() virtual function; no chain up
  * to the #ClutterOffscreenEffect implementation is required in this
  * case.
+ *
+ * ## Paint nodes
+ *
+ * #ClutterOffscreenEffect is generates the following paint node tree:
+ *
+ * |[<!-- language="plain" -->
+ * Effect
+ *  ├─────────┐
+ * Layer   Pipeline
+ *  │
+ * Actor
+ * ]|
+ *
+ * When the actor contents are cached, the generated paint node tree
+ * looks like this:
+ *
+ * |[<!-- language="plain" -->
+ * Effect
+ *  │
+ * Pipeline
+ * ]|
+ *
+ * In both cases, the "Pipeline" node is created with the return value
+ * of #ClutterOffscreenEffectClass.create_pipeline().
  */
 
 #include "clutter-build-config.h"