Merge pull request #108 from mahkoh/jorth/fix-zwlr-screencopy

render: fix wlr-screencopy with scaled outputs

src/ifs/zwlr_screencopy_frame_v1.rs

@@ -52,12 +52,13 @@ impl ZwlrScreencopyFrameV1 {
     }
 
     pub fn send_damage(&self) {
+        let pos = self.output.pos.get();
         self.client.event(Damage {
             self_id: self.id,
             x: 0,
             y: 0,
-            width: self.rect.width() as _,
-            height: self.rect.height() as _,
+            width: pos.width() as _,
+            height: pos.height() as _,
         });
     }
 

src/ifs/zwlr_screencopy_manager_v1.rs

@@ -97,8 +97,15 @@ impl ZwlrScreencopyManagerV1 {
         region: Option<Rect>,
     ) -> Result<(), ZwlrScreencopyManagerV1Error> {
         let output = self.client.lookup(output)?;
-        let mut rect = output.global.position().at_point(0, 0);
+        let mode = output.global.mode.get();
+        let mut rect = Rect::new_sized(0, 0, mode.width, mode.height).unwrap();
         if let Some(region) = region {
+            let scale = output.global.preferred_scale.get().to_f64();
+            let x1 = (region.x1() as f64 * scale).round() as i32;
+            let y1 = (region.y1() as f64 * scale).round() as i32;
+            let x2 = (region.x2() as f64 * scale).round() as i32;
+            let y2 = (region.y2() as f64 * scale).round() as i32;
+            let region = Rect::new(x1, y1, x2, y2).unwrap();
             rect = rect.intersect(region);
         }
         let frame = Rc::new(ZwlrScreencopyFrameV1 {