[gtk/wip/chergert/macos-fixes] macos: add API to get monitor colorspace

[Christian Hergert <chergert src gnome org>]

commit 473aceea68b8b947e33a735aece5054a2f43a3a8
Author: Christian Hergert <christian hergert me>
Date:   Fri Feb 4 09:45:55 2022 -0800

    macos: add API to get monitor colorspace

 gdk/macos/gdkmacosmonitor-private.h | 9 +++++----
 gdk/macos/gdkmacosmonitor.c         | 8 ++++++++
 2 files changed, 13 insertions(+), 4 deletions(-)
---
diff --git a/gdk/macos/gdkmacosmonitor-private.h b/gdk/macos/gdkmacosmonitor-private.h
index 3c6f058bd0..e15f17352d 100644
--- a/gdk/macos/gdkmacosmonitor-private.h
+++ b/gdk/macos/gdkmacosmonitor-private.h
@@ -29,10 +29,11 @@
 
 G_BEGIN_DECLS
 
-GdkMacosMonitor   *_gdk_macos_monitor_new           (GdkMacosDisplay   *display,
-                                                     CGDirectDisplayID  screen_id);
-CGDirectDisplayID  _gdk_macos_monitor_get_screen_id (GdkMacosMonitor   *self);
-gboolean           _gdk_macos_monitor_reconfigure   (GdkMacosMonitor   *self);
+GdkMacosMonitor   *_gdk_macos_monitor_new             (GdkMacosDisplay   *display,
+                                                       CGDirectDisplayID  screen_id);
+CGDirectDisplayID  _gdk_macos_monitor_get_screen_id   (GdkMacosMonitor   *self);
+gboolean           _gdk_macos_monitor_reconfigure     (GdkMacosMonitor   *self);
+CGColorSpaceRef    _gdk_macos_monitor_copy_colorspace (GdkMacosMonitor   *self);
 
 G_END_DECLS
 
diff --git a/gdk/macos/gdkmacosmonitor.c b/gdk/macos/gdkmacosmonitor.c
index a68668ced9..413b8f8c25 100644
--- a/gdk/macos/gdkmacosmonitor.c
+++ b/gdk/macos/gdkmacosmonitor.c
@@ -298,3 +298,11 @@ _gdk_macos_monitor_get_screen_id (GdkMacosMonitor *self)
 
   return self->screen_id;
 }
+
+CGColorSpaceRef
+_gdk_macos_monitor_copy_colorspace (GdkMacosMonitor *self)
+{
+  g_return_val_if_fail (GDK_IS_MACOS_MONITOR (self), NULL);
+
+  return CGDisplayCopyColorSpace (self->screen_id);
+}