Fix: Mac retina display video blur (#6980)

* fix mac retina display blur

Signed-off-by: Sahil Yeole <sahilyeole93@gmail.com>

* Update display.rs

---------

Signed-off-by: Sahil Yeole <sahilyeole93@gmail.com>
Co-authored-by: RustDesk <71636191+rustdesk@users.noreply.github.com>

libs/scrap/src/quartz/display.rs

@@ -35,11 +35,23 @@ impl Display {
     }
 
     pub fn width(self) -> usize {
-        unsafe { CGDisplayPixelsWide(self.0) }
+        let w = unsafe { CGDisplayPixelsWide(self.0) };
+        let s = self.scale();
+        if s > 1.0 {
+           ((w as f64) * s) as usize
+        } else {
+            w
+        }
     }
 
     pub fn height(self) -> usize {
-        unsafe { CGDisplayPixelsHigh(self.0) }
+        let h = unsafe { CGDisplayPixelsHigh(self.0) };
+        let s = self.scale();
+        if s > 1.0 {
+           ((h as f64) * s) as usize
+        } else {
+            h
+        }
     }
 
     pub fn is_builtin(self) -> bool {
@@ -58,6 +70,10 @@ impl Display {
         unsafe { CGDisplayIsOnline(self.0) != 0 }
     }
 
+    pub fn scale(self) -> f64 {
+        unsafe { BackingScaleFactor() } as _
+    }
+
     pub fn bounds(self) -> CGRect {
         unsafe { CGDisplayBounds(self.0) }
     }

libs/scrap/src/quartz/ffi.rs

@@ -193,6 +193,7 @@ extern "C" {
     pub fn CGDisplayIsOnline(display: u32) -> i32;
 
     pub fn CGDisplayBounds(display: u32) -> CGRect;
+    pub fn BackingScaleFactor() -> f32;
 
     // IOSurface