From 2fcebfed95447b994649f58f7b0d40e8bac8de08 Mon Sep 17 00:00:00 2001
From: Benjamin Franzke <benjaminfranzke@googlemail.com>
Date: Mon, 9 May 2011 17:35:58 +0200
Subject: [PATCH 1/3] Add buffer.release event

---
 protocol/wayland.xml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/protocol/wayland.xml b/protocol/wayland.xml
index ad350723..3dc3c0b8 100644
--- a/protocol/wayland.xml
+++ b/protocol/wayland.xml
@@ -139,6 +139,9 @@
 
     <!-- Destroy a buffer.  This will invalidate the object id. -->
     <request name="destroy" type="destructor"/>
+
+    <!-- Sent when an attached buffer is no longer used by the compositor. -->
+    <event name="release"/>
   </interface>
 
   <interface name="wl_shell" version="1">

From a56c0455717c4772e8e4b78e56af439ccd2356af Mon Sep 17 00:00:00 2001
From: Benjamin Franzke <benjaminfranzke@googlemail.com>
Date: Tue, 10 May 2011 12:01:00 +0200
Subject: [PATCH 2/3] Add busy_count and client parameter to wl_buffer

Can be used to implement release event.
---
 wayland/wayland-server.h | 2 ++
 wayland/wayland-shm.c    | 7 ++++---
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/wayland/wayland-server.h b/wayland/wayland-server.h
index 6a042cd8..62c45823 100644
--- a/wayland/wayland-server.h
+++ b/wayland/wayland-server.h
@@ -132,8 +132,10 @@ struct wl_resource {
 struct wl_buffer {
 	struct wl_resource resource;
 	struct wl_compositor *compositor;
+	struct wl_client *client;
 	struct wl_visual *visual;
 	int32_t width, height;
+	uint32_t busy_count;
 	void *user_data;
 };
 
diff --git a/wayland/wayland-shm.c b/wayland/wayland-shm.c
index cdd78745..90d2fcfb 100644
--- a/wayland/wayland-shm.c
+++ b/wayland/wayland-shm.c
@@ -80,20 +80,21 @@ const static struct wl_buffer_interface shm_buffer_interface = {
 };
 
 static struct wl_shm_buffer *
-wl_shm_buffer_init(struct wl_shm *shm, uint32_t id,
+wl_shm_buffer_init(struct wl_shm *shm, struct wl_client *client, uint32_t id,
 		   int32_t width, int32_t height,
 		   int32_t stride, struct wl_visual *visual,
 		   void *data)
 {
 	struct wl_shm_buffer *buffer;
 
-	buffer = malloc(sizeof *buffer);
+	buffer = calloc(1, sizeof *buffer);
 	if (buffer == NULL)
 		return NULL;
 
 	buffer->buffer.width = width;
 	buffer->buffer.height = height;
 	buffer->buffer.visual = visual;
+	buffer->buffer.client = client;
 	buffer->stride = stride;
 	buffer->data = data;
 
@@ -147,7 +148,7 @@ shm_create_buffer(struct wl_client *client, struct wl_shm *shm,
 		return;
 	}
 
-	buffer = wl_shm_buffer_init(shm, id,
+	buffer = wl_shm_buffer_init(shm, client, id,
 				    width, height, stride, visual,
 				    data);
 	if (buffer == NULL) {

From 4c2500c2e2abc380f34e3222d31222fd103015a5 Mon Sep 17 00:00:00 2001
From: Benjamin Franzke <benjaminfranzke@googlemail.com>
Date: Tue, 21 Jun 2011 17:37:18 +0200
Subject: [PATCH 3/3] Drop wl_compoositor parameter in wl_buffer

---
 wayland/wayland-server.h | 1 -
 1 file changed, 1 deletion(-)

diff --git a/wayland/wayland-server.h b/wayland/wayland-server.h
index 62c45823..7cd8e1ef 100644
--- a/wayland/wayland-server.h
+++ b/wayland/wayland-server.h
@@ -131,7 +131,6 @@ struct wl_resource {
 
 struct wl_buffer {
 	struct wl_resource resource;
-	struct wl_compositor *compositor;
 	struct wl_client *client;
 	struct wl_visual *visual;
 	int32_t width, height;