enable retina scale factor (#7269)

* enable retina scale factor

* enabled only when there are only one video service running
* scale mouse event
* scale cursor position
* scale remote menu display button
* adjust resolution

Signed-off-by: 21pages <pages21@163.com>

* Update server.rs

---------

Signed-off-by: 21pages <pages21@163.com>
Co-authored-by: RustDesk <71636191+rustdesk@users.noreply.github.com>

libs/scrap/src/common/quartz.rs

@@ -128,6 +128,10 @@ impl Display {
         self.0.height()
     }
 
+    pub fn scale(&self) -> f64 {
+        self.0.scale()
+    }
+
     pub fn name(&self) -> String {
         self.0.id().to_string()
     }

libs/scrap/src/quartz/display.rs

@@ -38,7 +38,7 @@ impl Display {
         let w = unsafe { CGDisplayPixelsWide(self.0) };
         let s = self.scale();
         if s > 1.0 {
-           ((w as f64) * s).round() as usize
+            ((w as f64) * s).round() as usize
         } else {
             w
         }
@@ -48,7 +48,7 @@ impl Display {
         let h = unsafe { CGDisplayPixelsHigh(self.0) };
         let s = self.scale();
         if s > 1.0 {
-           ((h as f64) * s).round() as usize
+            ((h as f64) * s).round() as usize
         } else {
             h
         }
@@ -71,7 +71,13 @@ impl Display {
     }
 
     pub fn scale(self) -> f64 {
-        // unsafe { BackingScaleFactor() as _ }
+        let s = unsafe { BackingScaleFactor() as _ };
+        if s > 1. {
+            let enable_retina = super::ENABLE_RETINA.lock().unwrap().clone();
+            if enable_retina {
+                return s;
+            }
+        }
         1.
     }
 

libs/scrap/src/quartz/mod.rs

@@ -9,3 +9,9 @@ mod config;
 mod display;
 pub mod ffi;
 mod frame;
+
+use std::sync::{Arc, Mutex};
+
+lazy_static::lazy_static! {
+    pub static ref ENABLE_RETINA: Arc<Mutex<bool>> = Arc::new(Mutex::new(true));
+}