From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jeremy Apthorp <nornagon@nornagon.net>
Date: Thu, 20 Sep 2018 17:49:24 -0700
Subject: mas: avoid usage of CGDisplayUsesForceToGray
Removes usage of the CGDisplayUsesForceToGray private API.
diff --git a/ui/display/mac/screen_mac.mm b/ui/display/mac/screen_mac.mm
index 1fb42e658d219e46bbc157d929d3b2158c063204..cb6dec724dbe511cb0c66d507d0b68db7296b648 100644
--- a/ui/display/mac/screen_mac.mm
+++ b/ui/display/mac/screen_mac.mm
@@ -155,7 +155,17 @@ DisplayMac BuildDisplayForScreen(NSScreen* screen) {
display.set_color_depth(Display::kDefaultBitsPerPixel);
display.set_depth_per_component(Display::kDefaultBitsPerComponent);
}
+#ifdef MAS_BUILD
+ // This is equivalent to the CGDisplayUsesForceToGray() API as at 2018-08-06,
+ // but avoids usage of the private API.
+ CFStringRef app = CFSTR("com.apple.CoreGraphics");
+ CFStringRef key = CFSTR("DisplayUseForcedGray");
+ Boolean key_valid = false;
+ display.set_is_monochrome(
+ CFPreferencesGetAppBooleanValue(key, app, &key_valid));
+#else
display.set_is_monochrome(CGDisplayUsesForceToGray());
+#endif
if (auto display_link = ui::DisplayLinkMac::GetForDisplay(display_id))
display.set_display_frequency(display_link->GetRefreshRate());
