wayland: add jay_screencast

wire/jay_screencast.txt

@@ -0,0 +1,99 @@
+# requests
+
+msg destroy = 0 {
+
+}
+
+msg set_output = 1 {
+    output: id(jay_output),
+}
+
+msg set_allow_all_workspaces = 2 {
+    allow_all: u32,
+}
+
+msg allow_workspace = 3 {
+    workspace: id(jay_workspace),
+}
+
+msg touch_allowed_workspaces = 4 {
+}
+
+msg set_use_linear_buffers = 5 {
+    use_linear: u32,
+}
+
+msg set_running = 6 {
+    running: u32,
+}
+
+msg configure = 7 {
+
+}
+
+msg ack_buffers = 8 {
+    serial: u32,
+}
+
+msg ack_config = 9 {
+    serial: u32,
+}
+
+msg release_buffer = 10 {
+    idx: u32,
+}
+
+# events
+
+msg plane = 0 {
+    fd: fd,
+    offset: u32,
+    stride: u32,
+}
+
+msg buffer = 1 {
+    format: u32,
+    modifier: pod(u64),
+    width: i32,
+    height: i32,
+}
+
+msg buffers_done = 2 {
+    serial: u32,
+}
+
+msg ready = 3 {
+    idx: u32,
+}
+
+msg destroyed = 4 {
+
+}
+
+msg missed_frame = 5 {
+
+}
+
+msg config_output = 6 {
+    linear_id: u32,
+}
+
+msg config_allow_all_workspaces = 7 {
+    allow_all: u32,
+}
+
+msg config_allow_workspace = 8 {
+    linear_id: u32,
+}
+
+msg config_use_linear_buffers = 9 {
+    use_linear: u32,
+}
+
+msg config_running = 10 {
+    running: u32,
+}
+
+msg config_done = 11 {
+    serial: u32,
+}