wayland: add a generic wayland client

src/wl_usr/usr_ifs/usr_wp_viewport.rs

@@ -0,0 +1,43 @@
+use {
+    crate::{
+        fixed::Fixed,
+        wire::{wp_viewport::*, WpViewportId},
+        wl_usr::{usr_object::UsrObject, UsrCon},
+    },
+    std::rc::Rc,
+};
+
+pub struct UsrWpViewport {
+    pub id: WpViewportId,
+    pub con: Rc<UsrCon>,
+}
+
+impl UsrWpViewport {
+    pub fn set_source(&self, x: Fixed, y: Fixed, width: Fixed, height: Fixed) {
+        self.con.request(SetSource {
+            self_id: self.id,
+            x,
+            y,
+            width,
+            height,
+        });
+    }
+
+    pub fn set_destination(&self, width: i32, height: i32) {
+        self.con.request(SetDestination {
+            self_id: self.id,
+            width,
+            height,
+        });
+    }
+}
+
+usr_object_base! {
+    UsrWpViewport, WpViewport;
+}
+
+impl UsrObject for UsrWpViewport {
+    fn destroy(&self) {
+        self.con.request(Destroy { self_id: self.id });
+    }
+}