From e160f6e7d28749df17739ac62e0b1534a14fcbbb Mon Sep 17 00:00:00 2001
From: Alexander Medvednikov <alexander@vlang.io>
Date: Thu, 3 Dec 2020 23:17:00 +0100
Subject: [PATCH] gg: screen_size()

---
 vlib/gg/gg.v          |  9 +++++++++
 vlib/gg/gg_darwin.c.v |  4 ++++
 vlib/gg/gg_darwin.m   | 14 ++++++++++++++
 3 files changed, 27 insertions(+)
 create mode 100644 vlib/gg/gg_darwin.c.v
 create mode 100644 vlib/gg/gg_darwin.m

diff --git a/vlib/gg/gg.v b/vlib/gg/gg.v
index afb3a61083..66d5cfb0a6 100644
--- a/vlib/gg/gg.v
+++ b/vlib/gg/gg.v
@@ -581,6 +581,15 @@ pub fn (ctx &Context) draw_empty_rounded_rect(x f32, y f32, w f32, h f32, radius
 	sgl.end()
 }
 
+
+pub fn screen_size() Size {
+	$if macos {
+		return C.gg_get_screen_size()
+	}
+	// TODO windows, linux, etc
+	return Size{}
+}
+
 fn C.WaitMessage()
 
 /*
diff --git a/vlib/gg/gg_darwin.c.v b/vlib/gg/gg_darwin.c.v
new file mode 100644
index 0000000000..808cd5fbed
--- /dev/null
+++ b/vlib/gg/gg_darwin.c.v
@@ -0,0 +1,4 @@
+module gg
+
+#include "@VROOT/vlib/gg/gg_darwin.m"
+fn C.gg_get_screen_size() Size
diff --git a/vlib/gg/gg_darwin.m b/vlib/gg/gg_darwin.m
new file mode 100644
index 0000000000..83b1a09284
--- /dev/null
+++ b/vlib/gg/gg_darwin.m
@@ -0,0 +1,14 @@
+#include <Cocoa/Cocoa.h>
+
+gg__Size gg_get_screen_size() {
+	NSScreen *screen = [NSScreen mainScreen];
+	NSDictionary *description = [screen deviceDescription];
+	NSSize displayPixelSize = [[description objectForKey:NSDeviceSize] sizeValue];
+	CGSize displayPhysicalSize = CGDisplayScreenSize(
+		[[description objectForKey:@"NSScreenNumber"] unsignedIntValue]);
+	gg__Size res;
+	res.width = displayPixelSize.width;
+	res.height = displayPixelSize.height;
+	return res;
+}
+