From 5cf2fc3a5fc2f7578286bb9b85c7e6bac9f6f278 Mon Sep 17 00:00:00 2001
From: Marcelo Fernandez <marcelofg55@gmail.com>
Date: Mon, 23 Oct 2017 12:05:42 -0300
Subject: [PATCH] Implemented vsync OS functions for OS X

---
 platform/osx/os_osx.h  |  3 +++
 platform/osx/os_osx.mm | 17 +++++++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/platform/osx/os_osx.h b/platform/osx/os_osx.h
index dd9a9cef538..ab2f89a3f02 100644
--- a/platform/osx/os_osx.h
+++ b/platform/osx/os_osx.h
@@ -212,6 +212,9 @@ public:
 	virtual void set_borderless_window(int p_borderless);
 	virtual bool get_borderless_window();
 
+	virtual void set_use_vsync(bool p_enable);
+	virtual bool is_vsync_enabled() const;
+
 	void run();
 
 	void set_mouse_mode(MouseMode p_mode);
diff --git a/platform/osx/os_osx.mm b/platform/osx/os_osx.mm
index 1a382a8ade9..361fe398f26 100644
--- a/platform/osx/os_osx.mm
+++ b/platform/osx/os_osx.mm
@@ -1810,6 +1810,23 @@ Error OS_OSX::move_path_to_trash(String p_dir) {
 	return OK;
 }
 
+void OS_OSX::set_use_vsync(bool p_enable) {
+	CGLContextObj ctx = CGLGetCurrentContext();
+	if (ctx) {
+		GLint swapInterval = p_enable ? 1 : 0;
+		CGLSetParameter(ctx, kCGLCPSwapInterval, &swapInterval);
+	}
+}
+
+bool OS_OSX::is_vsync_enabled() const {
+	GLint swapInterval = 0;
+	CGLContextObj ctx = CGLGetCurrentContext();
+	if (ctx) {
+		CGLGetParameter(ctx, kCGLCPSwapInterval, &swapInterval);
+	}
+	return swapInterval ? true : false;
+}
+
 OS_OSX *OS_OSX::singleton = NULL;
 
 OS_OSX::OS_OSX() {