Improve macOS screen info reporting

README.md

@@ -33,8 +33,8 @@ for m in get_monitors():
 **Output**:
 
 ```python console
-Monitor(x=3840, y=0, width=3840, height=2160, width_mm=1420, height_mm=800, name='HDMI-0', is_primary=False)
-Monitor(x=0, y=0, width=3840, height=2160, width_mm=708, height_mm=399, name='DP-0', is_primary=True)
+Monitor(x=3840, y=0, width=3840, height=2160, scale=1, width_mm=1420, height_mm=800, ppmm=(2.704225352112676, 2.7), name='HDMI-0', is_primary=False)
+Monitor(x=0, y=0, width=3840, height=2160, scale=1, width_mm=708, height_mm=399, ppmm=(5.423728813559322, 5.413533834586466), name='DP-0', is_primary=True)
 ```
 
 ### Forcing environment

pyproject.toml

@@ -28,7 +28,7 @@ packages = [{ include = "screeninfo" }]
 python = "^3.6.2"
 dataclasses = { version = "*", python = "<3.7" }
 Cython = { version = "*", platform = "darwin" }
-pyobjc-framework-Cocoa = { version = "*", platform = "darwin" }
+pyobjc-framework-Quartz = { version = "*", platform = "darwin" }
 
 [tool.poetry.dev-dependencies]
 pytest = "^6.2.5"

screeninfo/common.py

@@ -11,17 +11,26 @@ class Monitor:
     y: int
     width: int
     height: int
+    scale: float = 1
     width_mm: T.Optional[int] = None
     height_mm: T.Optional[int] = None
     name: T.Optional[str] = None
     is_primary: T.Optional[bool] = None
 
+    @property
+    def ppmm(self) -> T.Optional[T.Tuple[float, float]]:
+        if not self.width_mm or not self.height_mm:
+            return None
+        return (self.width/self.width_mm, self.height/self.height_mm)
+
     def __repr__(self) -> str:
         return (
             f"Monitor("
             f"x={self.x}, y={self.y}, "
             f"width={self.width}, height={self.height}, "
+            f"scale={self.scale}, "
             f"width_mm={self.width_mm}, height_mm={self.height_mm}, "
+            f"ppmm={self.ppmm!r}, "
             f"name={self.name!r}, "
             f"is_primary={self.is_primary}"
             f")"

screeninfo/enumerators/osx.py

@@ -10,7 +10,8 @@ def check_primary(screens: T.Any, screen: T.Any) -> bool:
 
 
 def enumerate_monitors() -> T.Iterable[Monitor]:
-    from AppKit import NSScreen
+    from AppKit import NSScreen, NSDeviceSize
+    from Quartz import CGDisplayScreenSize
 
     screens = NSScreen.screens()
 
@@ -19,10 +20,16 @@ def enumerate_monitors() -> T.Iterable[Monitor]:
         if callable(f):
             f = f()
 
+        description = screen.deviceDescription()
+        width, height = description[NSDeviceSize].sizeValue()
+        width_mm, height_mm = CGDisplayScreenSize(description["NSScreenNumber"])
         yield Monitor(
             x=int(f.origin.x),
             y=int(f.origin.y),
-            width=int(f.size.width),
-            height=int(f.size.height),
+            width=width,
+            height=height,
+            scale=screen.backingScaleFactor(),
+            width_mm=width_mm,
+            height_mm=height_mm,
             is_primary=check_primary(screens, screen),
         )

tests/test_documentation.py

@@ -38,6 +38,7 @@ def test_documentation(capsys) -> None:
                 y=0,
                 width=3840,
                 height=2160,
+                scale=1,
                 width_mm=1420,
                 height_mm=800,
                 name="HDMI-0",
@@ -48,6 +49,7 @@ def test_documentation(capsys) -> None:
                 y=0,
                 width=3840,
                 height=2160,
+                scale=1,
                 width_mm=708,
                 height_mm=399,
                 name="DP-0",