buffers: update threaded implementations

src/buffers.rs

@@ -85,7 +85,8 @@ impl Default for BoundSurface<Arc<Mutex<ShaderBinding>>> {
         Self {
             binding: Arc::new(Mutex::new(ShaderBinding {
                 shader: None,
-                rect: Rectangle::everything()
+                rect: Rectangle::everything(),
+                opacity: 255
             })),
         }
     }
@@ -96,7 +97,6 @@ impl Surface for BoundSurface<Arc<Mutex<ShaderBinding>>> {
     fn rect(&self) -> Rectangle<u8, Virtual> {
         let r = self.binding.lock().unwrap();
         r.rect.clone()
-        //self.binding.lock().unwrap().rect.clone()
     }
 
     fn with_shader<F: FnMut(&dyn Shader)>(&self, mut f: F) {
@@ -112,6 +112,18 @@ impl Surface for BoundSurface<Arc<Mutex<ShaderBinding>>> {
     fn clear_shader(&mut self) {
         self.binding.lock().unwrap().shader = None;
     }
+
+    fn set_rect(&mut self, rect: &Rectangle<u8, Virtual>) {
+        self.binding.lock().unwrap().rect = rect.clone();
+    }
+
+    fn opacity(&self) -> u8 {
+        self.binding.lock().unwrap().opacity
+    }
+
+    fn set_opacity(&mut self, opacity: u8) {
+        self.binding.lock().unwrap().opacity = opacity
+    }
 }
 
 #[cfg(feature="threads")]