[mutter.wiki] Create Frame scheduling

[Jonas Ådahl <jadahl src gnome org>]

commit 269e2e9a1a701e7788c217d0e530a5b6a1ed3bd3
Author: Jonas Ådahl <jadahl gmail com>
Date:   Fri Oct 23 19:33:53 2020 +0000

    Create Frame scheduling

 Frame-scheduling.md | 12 ++++++++++++
 1 file changed, 12 insertions(+)
---
diff --git a/Frame-scheduling.md b/Frame-scheduling.md
new file mode 100644
index 0000000..e8f0f9e
--- /dev/null
+++ b/Frame-scheduling.md
@@ -0,0 +1,12 @@
+`ClutterFrameClock` state diagram.
+
+```mermaid
+stateDiagram
+    Init --> Scheduled : schedule update() -> now
+    Idle --> Scheduled : schedule update() -> given presentation time
+    Scheduled --> Dispatching : target time hit
+    Dispatching --> PendingPresented : queued page flip
+    Dispatching --> Idle : no queued page flip
+    PendingPresented --> Scheduled : page flipped, if recent schedule update
+    PendingPresented --> Idle : page flipped
+```
\ No newline at end of file