From 2a63f4fc61185693c8917b28863eb9739096026f Mon Sep 17 00:00:00 2001
From: Andri Yngvason <andri@yngvason.is>
Date: Sat, 19 Oct 2019 14:46:37 +0000
Subject: [PATCH] protocol/screencopy: Add damage reporting

---
 protocol/wlr-screencopy-unstable-v1.xml | 32 +++++++++++++++++++++++--
 1 file changed, 30 insertions(+), 2 deletions(-)

diff --git a/protocol/wlr-screencopy-unstable-v1.xml b/protocol/wlr-screencopy-unstable-v1.xml
index a7a2d172..e4c21f80 100644
--- a/protocol/wlr-screencopy-unstable-v1.xml
+++ b/protocol/wlr-screencopy-unstable-v1.xml
@@ -2,6 +2,7 @@
 <protocol name="wlr_screencopy_unstable_v1">
   <copyright>
     Copyright © 2018 Simon Ser
+    Copyright © 2019 Andri Yngvason
 
     Permission is hereby granted, free of charge, to any person obtaining a
     copy of this software and associated documentation files (the "Software"),
@@ -37,7 +38,7 @@
     interface version number is reset.
   </description>
 
-  <interface name="zwlr_screencopy_manager_v1" version="1">
+  <interface name="zwlr_screencopy_manager_v1" version="2">
     <description summary="manager to inform clients and begin capturing">
       This object is a manager which offers requests to start capturing from a
       source.
@@ -79,7 +80,7 @@
     </request>
   </interface>
 
-  <interface name="zwlr_screencopy_frame_v1" version="1">
+  <interface name="zwlr_screencopy_frame_v1" version="2">
     <description summary="a frame ready for copy">
       This object represents a single frame.
 
@@ -175,5 +176,32 @@
         Destroys the frame. This request can be sent at any time by the client.
       </description>
     </request>
+
+    <!-- Version 2 additions -->
+    <request name="copy_with_damage" since="2">
+      <description summary="copy the frame when it's damaged">
+        Same as copy, except it waits until there is damage to copy.
+      </description>
+      <arg name="buffer" type="object" interface="wl_buffer"/>
+    </request>
+
+    <event name="damage" since="2">
+      <description summary="carries the coordinates of the damaged region">
+        This event is sent right before the ready event when copy_with_damage is
+        requested. It may be generated multiple times for each copy_with_damage
+        request.
+
+        The arguments describe a box around an area that has changed since the
+        last copy request that was derived from the current screencopy manager
+        instance.
+
+        The union of all regions received between the call to copy_with_damage
+        and a ready event is the total damage since the prior ready event.
+      </description>
+      <arg name="x" type="uint" summary="damaged x coordinates"/>
+      <arg name="y" type="uint" summary="damaged y coordinates"/>
+      <arg name="width" type="uint" summary="current width"/>
+      <arg name="height" type="uint" summary="current height"/>
+    </event>
   </interface>
 </protocol>