/*************************************************************************/
/*  display_server_osx.mm                                                */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/

#include "display_server_osx.h"

#include "godot_content_view.h"
#include "godot_menu_item.h"
#include "godot_window.h"
#include "godot_window_delegate.h"
#include "key_mapping_osx.h"
#include "os_osx.h"

#include "core/io/marshalls.h"
#include "core/math/geometry_2d.h"
#include "core/os/keyboard.h"
#include "main/main.h"
#include "scene/resources/texture.h"

#include <Carbon/Carbon.h>
#include <Cocoa/Cocoa.h>
#include <IOKit/IOCFPlugIn.h>
#include <IOKit/IOKitLib.h>
#include <IOKit/hid/IOHIDKeys.h>
#include <IOKit/hid/IOHIDLib.h>

#if defined(GLES3_ENABLED)
#include "drivers/gles3/rasterizer_gles3.h"
#endif

#if defined(VULKAN_ENABLED)
#include "servers/rendering/renderer_rd/renderer_compositor_rd.h"
#endif

const NSMenu *DisplayServerOSX::_get_menu_root(const String &p_menu_root) const {
	const NSMenu *menu = nullptr;
	if (p_menu_root == "") {
		// Main menu.
		menu = [NSApp mainMenu];
	} else if (p_menu_root.to_lower() == "_dock") {
		// macOS dock menu.
		menu = dock_menu;
	} else {
		// Submenu.
		if (submenu.has(p_menu_root)) {
			menu = submenu[p_menu_root];
		}
	}
	if (menu == apple_menu) {
		// Do not allow to change Apple menu.
		return nullptr;
	}
	return menu;
}

NSMenu *DisplayServerOSX::_get_menu_root(const String &p_menu_root) {
	NSMenu *menu = nullptr;
	if (p_menu_root == "") {
		// Main menu.
		menu = [NSApp mainMenu];
	} else if (p_menu_root.to_lower() == "_dock") {
		// macOS dock menu.
		menu = dock_menu;
	} else {
		// Submenu.
		if (!submenu.has(p_menu_root)) {
			NSMenu *n_menu = [[NSMenu alloc] initWithTitle:[NSString stringWithUTF8String:p_menu_root.utf8().get_data()]];
			submenu[p_menu_root] = n_menu;
		}
		menu = submenu[p_menu_root];
	}
	if (menu == apple_menu) {
		// Do not allow to change Apple menu.
		return nullptr;
	}
	return menu;
}

DisplayServerOSX::WindowID DisplayServerOSX::_create_window(WindowMode p_mode, VSyncMode p_vsync_mode, const Rect2i &p_rect) {
	WindowID id;
	const float scale = screen_get_max_scale();
	{
		WindowData wd;

		wd.window_delegate = [[GodotWindowDelegate alloc] init];
		ERR_FAIL_COND_V_MSG(wd.window_delegate == nil, INVALID_WINDOW_ID, "Can't create a window delegate");
		[wd.window_delegate setWindowID:window_id_counter];

		Point2i position = p_rect.position;
		// OS X native y-coordinate relative to _get_screens_origin() is negative,
		// Godot passes a positive value.
		position.y *= -1;
		position += _get_screens_origin();

		// initWithContentRect uses bottom-left corner of the window’s frame as origin.
		wd.window_object = [[GodotWindow alloc]
				initWithContentRect:NSMakeRect(position.x / scale, (position.y - p_rect.size.height) / scale, p_rect.size.width / scale, p_rect.size.height / scale)
						  styleMask:NSWindowStyleMaskTitled | NSWindowStyleMaskClosable | NSWindowStyleMaskMiniaturizable | NSWindowStyleMaskResizable
							backing:NSBackingStoreBuffered
							  defer:NO];
		ERR_FAIL_COND_V_MSG(wd.window_object == nil, INVALID_WINDOW_ID, "Can't create a window");
		[wd.window_object setWindowID:window_id_counter];

		wd.window_view = [[GodotContentView alloc] init];
		ERR_FAIL_COND_V_MSG(wd.window_view == nil, INVALID_WINDOW_ID, "Can't create a window view");
		[wd.window_view setWindowID:window_id_counter];
		[wd.window_view setWantsLayer:TRUE];

		[wd.window_object setCollectionBehavior:NSWindowCollectionBehaviorFullScreenPrimary];
		[wd.window_object setContentView:wd.window_view];
		[wd.window_object setDelegate:wd.window_delegate];
		[wd.window_object setAcceptsMouseMovedEvents:YES];
		[wd.window_object setRestorable:NO];
		[wd.window_object setColorSpace:[NSColorSpace sRGBColorSpace]];

		if ([wd.window_object respondsToSelector:@selector(setTabbingMode:)]) {
			[wd.window_object setTabbingMode:NSWindowTabbingModeDisallowed];
		}

		CALayer *layer = [wd.window_view layer];
		if (layer) {
			layer.contentsScale = scale;
		}

#if defined(VULKAN_ENABLED)
		if (context_vulkan) {
			Error err = context_vulkan->window_create(window_id_counter, p_vsync_mode, wd.window_view, p_rect.size.width, p_rect.size.height);
			ERR_FAIL_COND_V_MSG(err != OK, INVALID_WINDOW_ID, "Can't create a Vulkan context");
		}
#endif
#if defined(GLES3_ENABLED)
		if (gl_manager) {
			Error err = gl_manager->window_create(window_id_counter, wd.window_view, p_rect.size.width, p_rect.size.height);
			ERR_FAIL_COND_V_MSG(err != OK, INVALID_WINDOW_ID, "Can't create an OpenGL context");
		}
#endif
		id = window_id_counter++;
		windows[id] = wd;
	}

	WindowData &wd = windows[id];
	window_set_mode(p_mode, id);

	const NSRect contentRect = [wd.window_view frame];
	wd.size.width = contentRect.size.width * scale;
	wd.size.height = contentRect.size.height * scale;

	CALayer *layer = [wd.window_view layer];
	if (layer) {
		layer.contentsScale = scale;
	}

#if defined(GLES3_ENABLED)
	if (gl_manager) {
		gl_manager->window_resize(id, wd.size.width, wd.size.height);
	}
#endif
#if defined(VULKAN_ENABLED)
	if (context_vulkan) {
		context_vulkan->window_resize(id, wd.size.width, wd.size.height);
	}
#endif

	return id;
}

void DisplayServerOSX::_update_window_style(WindowData p_wd) {
	bool borderless_full = false;

	if (p_wd.borderless) {
		NSRect frameRect = [p_wd.window_object frame];
		NSRect screenRect = [[p_wd.window_object screen] frame];

		// Check if our window covers up the screen.
		if (frameRect.origin.x <= screenRect.origin.x && frameRect.origin.y <= frameRect.origin.y &&
				frameRect.size.width >= screenRect.size.width && frameRect.size.height >= screenRect.size.height) {
			borderless_full = true;
		}
	}

	if (borderless_full) {
		// If the window covers up the screen set the level to above the main menu and hide on deactivate.
		[p_wd.window_object setLevel:NSMainMenuWindowLevel + 1];
		[p_wd.window_object setHidesOnDeactivate:YES];
	} else {
		// Reset these when our window is not a borderless window that covers up the screen.
		if (p_wd.on_top && !p_wd.fullscreen) {
			[p_wd.window_object setLevel:NSFloatingWindowLevel];
		} else {
			[p_wd.window_object setLevel:NSNormalWindowLevel];
		}
		[p_wd.window_object setHidesOnDeactivate:NO];
	}
}

void DisplayServerOSX::_set_window_per_pixel_transparency_enabled(bool p_enabled, WindowID p_window) {
	ERR_FAIL_COND(!windows.has(p_window));
	WindowData &wd = windows[p_window];

	if (!OS::get_singleton()->is_layered_allowed()) {
		return;
	}
	if (wd.layered_window != p_enabled) {
		if (p_enabled) {
			[wd.window_object setBackgroundColor:[NSColor clearColor]];
			[wd.window_object setOpaque:NO];
			[wd.window_object setHasShadow:NO];
			CALayer *layer = [wd.window_view layer];
			if (layer) {
				[layer setBackgroundColor:[NSColor clearColor].CGColor];
				[layer setOpaque:NO];
			}
#if defined(GLES3_ENABLED)
			if (gl_manager) {
				gl_manager->window_set_per_pixel_transparency_enabled(p_window, true);
			}
#endif
			wd.layered_window = true;
		} else {
			[wd.window_object setBackgroundColor:[NSColor colorWithCalibratedWhite:1 alpha:1]];
			[wd.window_object setOpaque:YES];
			[wd.window_object setHasShadow:YES];
			CALayer *layer = [wd.window_view layer];
			if (layer) {
				[layer setBackgroundColor:[NSColor colorWithCalibratedWhite:1 alpha:1].CGColor];
				[layer setOpaque:YES];
			}
#if defined(GLES3_ENABLED)
			if (gl_manager) {
				gl_manager->window_set_per_pixel_transparency_enabled(p_window, false);
			}
#endif
			wd.layered_window = false;
		}
		NSRect frameRect = [wd.window_object frame];
		[wd.window_object setFrame:NSMakeRect(frameRect.origin.x, frameRect.origin.y, frameRect.size.width + 1, frameRect.size.height) display:YES];
		[wd.window_object setFrame:frameRect display:YES];
	}
}

void DisplayServerOSX::_update_displays_arrangement() {
	origin = Point2i();

	for (int i = 0; i < get_screen_count(); i++) {
		Point2i position = _get_native_screen_position(i);
		if (position.x < origin.x) {
			origin.x = position.x;
		}
		if (position.y > origin.y) {
			origin.y = position.y;
		}
	}
	displays_arrangement_dirty = false;
}

Point2i DisplayServerOSX::_get_screens_origin() const {
	// Returns the native top-left screen coordinate of the smallest rectangle
	// that encompasses all screens. Needed in get_screen_position(),
	// window_get_position, and window_set_position()
	// to convert between OS X native screen coordinates and the ones expected by Godot.

	if (displays_arrangement_dirty) {
		const_cast<DisplayServerOSX *>(this)->_update_displays_arrangement();
	}

	return origin;
}

Point2i DisplayServerOSX::_get_native_screen_position(int p_screen) const {
	NSArray *screenArray = [NSScreen screens];
	if ((NSUInteger)p_screen < [screenArray count]) {
		NSRect nsrect = [[screenArray objectAtIndex:p_screen] frame];
		// Return the top-left corner of the screen, for OS X the y starts at the bottom.
		return Point2i(nsrect.origin.x, nsrect.origin.y + nsrect.size.height) * screen_get_max_scale();
	}

	return Point2i();
}

void DisplayServerOSX::_displays_arrangement_changed(CGDirectDisplayID display_id, CGDisplayChangeSummaryFlags flags, void *user_info) {
	DisplayServerOSX *ds = (DisplayServerOSX *)DisplayServer::get_singleton();
	if (ds) {
		ds->displays_arrangement_dirty = true;
	}
}

void DisplayServerOSX::_dispatch_input_events(const Ref<InputEvent> &p_event) {
	((DisplayServerOSX *)(get_singleton()))->_dispatch_input_event(p_event);
}

void DisplayServerOSX::_dispatch_input_event(const Ref<InputEvent> &p_event) {
	_THREAD_SAFE_METHOD_
	if (!in_dispatch_input_event) {
		in_dispatch_input_event = true;

		Variant ev = p_event;
		Variant *evp = &ev;
		Variant ret;
		Callable::CallError ce;

		{
			List<WindowID>::Element *E = popup_list.front();
			if (E && Object::cast_to<InputEventKey>(*p_event)) {
				// Redirect keyboard input to active popup.
				if (windows.has(E->get())) {
					Callable callable = windows[E->get()].input_event_callback;
					if (callable.is_valid()) {
						callable.call((const Variant **)&evp, 1, ret, ce);
					}
				}
				in_dispatch_input_event = false;
				return;
			}
		}

		Ref<InputEventFromWindow> event_from_window = p_event;
		if (event_from_window.is_valid() && event_from_window->get_window_id() != INVALID_WINDOW_ID) {
			// Send to a window.
			if (windows.has(event_from_window->get_window_id())) {
				Callable callable = windows[event_from_window->get_window_id()].input_event_callback;
				if (callable.is_valid()) {
					callable.call((const Variant **)&evp, 1, ret, ce);
				}
			}
		} else {
			// Send to all windows.
			for (KeyValue<WindowID, WindowData> &E : windows) {
				Callable callable = E.value.input_event_callback;
				if (callable.is_valid()) {
					callable.call((const Variant **)&evp, 1, ret, ce);
				}
			}
		}
		in_dispatch_input_event = false;
	}
}

void DisplayServerOSX::_push_input(const Ref<InputEvent> &p_event) {
	Ref<InputEvent> ev = p_event;
	Input::get_singleton()->parse_input_event(ev);
}

void DisplayServerOSX::_process_key_events() {
	Ref<InputEventKey> k;
	for (int i = 0; i < key_event_pos; i++) {
		const KeyEvent &ke = key_event_buffer[i];
		if (ke.raw) {
			// Non IME input - no composite characters, pass events as is.
			k.instantiate();

			k->set_window_id(ke.window_id);
			get_key_modifier_state(ke.osx_state, k);
			k->set_pressed(ke.pressed);
			k->set_echo(ke.echo);
			k->set_keycode(ke.keycode);
			k->set_physical_keycode((Key)ke.physical_keycode);
			k->set_unicode(ke.unicode);

			_push_input(k);
		} else {
			// IME input.
			if ((i == 0 && ke.keycode == Key::NONE) || (i > 0 && key_event_buffer[i - 1].keycode == Key::NONE)) {
				k.instantiate();

				k->set_window_id(ke.window_id);
				get_key_modifier_state(ke.osx_state, k);
				k->set_pressed(ke.pressed);
				k->set_echo(ke.echo);
				k->set_keycode(Key::NONE);
				k->set_physical_keycode(Key::NONE);
				k->set_unicode(ke.unicode);

				_push_input(k);
			}
			if (ke.keycode != Key::NONE) {
				k.instantiate();

				k->set_window_id(ke.window_id);
				get_key_modifier_state(ke.osx_state, k);
				k->set_pressed(ke.pressed);
				k->set_echo(ke.echo);
				k->set_keycode(ke.keycode);
				k->set_physical_keycode((Key)ke.physical_keycode);

				if (i + 1 < key_event_pos && key_event_buffer[i + 1].keycode == Key::NONE) {
					k->set_unicode(key_event_buffer[i + 1].unicode);
				}

				_push_input(k);
			}
		}
	}

	key_event_pos = 0;
}

void DisplayServerOSX::_update_keyboard_layouts() {
	kbd_layouts.clear();
	current_layout = 0;

	TISInputSourceRef cur_source = TISCopyCurrentKeyboardInputSource();
	NSString *cur_name = (__bridge NSString *)TISGetInputSourceProperty(cur_source, kTISPropertyLocalizedName);
	CFRelease(cur_source);

	// Enum IME layouts.
	NSDictionary *filter_ime = @{ (NSString *)kTISPropertyInputSourceType : (NSString *)kTISTypeKeyboardInputMode };
	NSArray *list_ime = (__bridge NSArray *)TISCreateInputSourceList((__bridge CFDictionaryRef)filter_ime, false);
	for (NSUInteger i = 0; i < [list_ime count]; i++) {
		LayoutInfo ly;
		NSString *name = (__bridge NSString *)TISGetInputSourceProperty((__bridge TISInputSourceRef)[list_ime objectAtIndex:i], kTISPropertyLocalizedName);
		ly.name.parse_utf8([name UTF8String]);

		NSArray *langs = (__bridge NSArray *)TISGetInputSourceProperty((__bridge TISInputSourceRef)[list_ime objectAtIndex:i], kTISPropertyInputSourceLanguages);
		ly.code.parse_utf8([(NSString *)[langs objectAtIndex:0] UTF8String]);
		kbd_layouts.push_back(ly);

		if ([name isEqualToString:cur_name]) {
			current_layout = kbd_layouts.size() - 1;
		}
	}

	// Enum plain keyboard layouts.
	NSDictionary *filter_kbd = @{ (NSString *)kTISPropertyInputSourceType : (NSString *)kTISTypeKeyboardLayout };
	NSArray *list_kbd = (__bridge NSArray *)TISCreateInputSourceList((__bridge CFDictionaryRef)filter_kbd, false);
	for (NSUInteger i = 0; i < [list_kbd count]; i++) {
		LayoutInfo ly;
		NSString *name = (__bridge NSString *)TISGetInputSourceProperty((__bridge TISInputSourceRef)[list_kbd objectAtIndex:i], kTISPropertyLocalizedName);
		ly.name.parse_utf8([name UTF8String]);

		NSArray *langs = (__bridge NSArray *)TISGetInputSourceProperty((__bridge TISInputSourceRef)[list_kbd objectAtIndex:i], kTISPropertyInputSourceLanguages);
		ly.code.parse_utf8([(NSString *)[langs objectAtIndex:0] UTF8String]);
		kbd_layouts.push_back(ly);

		if ([name isEqualToString:cur_name]) {
			current_layout = kbd_layouts.size() - 1;
		}
	}

	keyboard_layout_dirty = false;
}

void DisplayServerOSX::_keyboard_layout_changed(CFNotificationCenterRef center, void *observer, CFStringRef name, const void *object, CFDictionaryRef user_info) {
	DisplayServerOSX *ds = (DisplayServerOSX *)DisplayServer::get_singleton();
	if (ds) {
		ds->keyboard_layout_dirty = true;
	}
}

NSCursor *DisplayServerOSX::_cursor_from_selector(SEL p_selector, SEL p_fallback) {
	if ([NSCursor respondsToSelector:p_selector]) {
		id object = [NSCursor performSelector:p_selector];
		if ([object isKindOfClass:[NSCursor class]]) {
			return object;
		}
	}
	if (p_fallback) {
		// Fallback should be a reasonable default, no need to check.
		return [NSCursor performSelector:p_fallback];
	}
	return [NSCursor arrowCursor];
}

NSMenu *DisplayServerOSX::get_dock_menu() const {
	return dock_menu;
}

void DisplayServerOSX::menu_callback(id p_sender) {
	if (![p_sender representedObject]) {
		return;
	}

	GodotMenuItem *value = [p_sender representedObject];

	if (value) {
		if (value->checkable) {
			if ([p_sender state] == NSControlStateValueOff) {
				[p_sender setState:NSControlStateValueOn];
			} else {
				[p_sender setState:NSControlStateValueOff];
			}
		}

		if (value->callback != Callable()) {
			Variant tag = value->meta;
			Variant *tagp = &tag;
			Variant ret;
			Callable::CallError ce;
			value->callback.call((const Variant **)&tagp, 1, ret, ce);
		}
	}
}

bool DisplayServerOSX::has_window(WindowID p_window) const {
	return windows.has(p_window);
}

DisplayServerOSX::WindowData &DisplayServerOSX::get_window(WindowID p_window) {
	return windows[p_window];
}

void DisplayServerOSX::send_event(NSEvent *p_event) {
	if ([p_event type] == NSEventTypeLeftMouseDown || [p_event type] == NSEventTypeRightMouseDown || [p_event type] == NSEventTypeOtherMouseDown) {
		mouse_process_popups();
	}
	// Special case handling of command-period, which is traditionally a special
	// shortcut in macOS and doesn't arrive at our regular keyDown handler.
	if ([p_event type] == NSEventTypeKeyDown) {
		if (([p_event modifierFlags] & NSEventModifierFlagCommand) && [p_event keyCode] == 0x2f) {
			Ref<InputEventKey> k;
			k.instantiate();

			get_key_modifier_state([p_event modifierFlags], k);
			k->set_window_id(DisplayServerOSX::INVALID_WINDOW_ID);
			k->set_pressed(true);
			k->set_keycode(Key::PERIOD);
			k->set_physical_keycode(Key::PERIOD);
			k->set_echo([p_event isARepeat]);

			Input::get_singleton()->parse_input_event(k);
		}
	}
}

void DisplayServerOSX::send_window_event(const WindowData &wd, WindowEvent p_event) {
	_THREAD_SAFE_METHOD_

	if (!wd.event_callback.is_null()) {
		Variant event = int(p_event);
		Variant *eventp = &event;
		Variant ret;
		Callable::CallError ce;
		wd.event_callback.call((const Variant **)&eventp, 1, ret, ce);
	}
}

void DisplayServerOSX::release_pressed_events() {
	_THREAD_SAFE_METHOD_
	if (Input::get_singleton()) {
		Input::get_singleton()->release_pressed_events();
	}
}

void DisplayServerOSX::get_key_modifier_state(unsigned int p_osx_state, Ref<InputEventWithModifiers> r_state) const {
	r_state->set_shift_pressed((p_osx_state & NSEventModifierFlagShift));
	r_state->set_ctrl_pressed((p_osx_state & NSEventModifierFlagControl));
	r_state->set_alt_pressed((p_osx_state & NSEventModifierFlagOption));
	r_state->set_meta_pressed((p_osx_state & NSEventModifierFlagCommand));
}

void DisplayServerOSX::update_mouse_pos(DisplayServerOSX::WindowData &p_wd, NSPoint p_location_in_window) {
	const NSRect content_rect = [p_wd.window_view frame];
	const float scale = screen_get_max_scale();
	p_wd.mouse_pos.x = p_location_in_window.x * scale;
	p_wd.mouse_pos.y = (content_rect.size.height - p_location_in_window.y) * scale;
	Input::get_singleton()->set_mouse_position(p_wd.mouse_pos);
}

void DisplayServerOSX::push_to_key_event_buffer(const DisplayServerOSX::KeyEvent &p_event) {
	if (key_event_pos >= key_event_buffer.size()) {
		key_event_buffer.resize(1 + key_event_pos);
	}
	key_event_buffer.write[key_event_pos++] = p_event;
}

void DisplayServerOSX::update_im_text(const Point2i &p_selection, const String &p_text) {
	im_selection = p_selection;
	im_text = p_text;

	OS::get_singleton()->get_main_loop()->notification(MainLoop::NOTIFICATION_OS_IME_UPDATE);
}

void DisplayServerOSX::set_last_focused_window(WindowID p_window) {
	last_focused_window = p_window;
}

void DisplayServerOSX::set_is_resizing(bool p_is_resizing) {
	is_resizing = p_is_resizing;
}

bool DisplayServerOSX::get_is_resizing() const {
	return is_resizing;
}

void DisplayServerOSX::window_update(WindowID p_window) {
#if defined(GLES3_ENABLED)
	if (gl_manager) {
		gl_manager->window_update(p_window);
	}
#endif
}

void DisplayServerOSX::window_destroy(WindowID p_window) {
#if defined(GLES3_ENABLED)
	if (gl_manager) {
		gl_manager->window_destroy(p_window);
	}
#endif
#ifdef VULKAN_ENABLED
	if (context_vulkan) {
		context_vulkan->window_destroy(p_window);
	}
#endif
	windows.erase(p_window);
}

void DisplayServerOSX::window_resize(WindowID p_window, int p_width, int p_height) {
#if defined(GLES3_ENABLED)
	if (gl_manager) {
		gl_manager->window_resize(p_window, p_width, p_height);
	}
#endif
#if defined(VULKAN_ENABLED)
	if (context_vulkan) {
		context_vulkan->window_resize(p_window, p_width, p_height);
	}
#endif
}

bool DisplayServerOSX::has_feature(Feature p_feature) const {
	switch (p_feature) {
		case FEATURE_GLOBAL_MENU:
		case FEATURE_SUBWINDOWS:
		//case FEATURE_TOUCHSCREEN:
		case FEATURE_MOUSE:
		case FEATURE_MOUSE_WARP:
		case FEATURE_CLIPBOARD:
		case FEATURE_CURSOR_SHAPE:
		case FEATURE_CUSTOM_CURSOR_SHAPE:
		case FEATURE_NATIVE_DIALOG:
		case FEATURE_IME:
		case FEATURE_WINDOW_TRANSPARENCY:
		case FEATURE_HIDPI:
		case FEATURE_ICON:
		case FEATURE_NATIVE_ICON:
		//case FEATURE_KEEP_SCREEN_ON:
		case FEATURE_SWAP_BUFFERS:
			return true;
		default: {
		}
	}
	return false;
}

String DisplayServerOSX::get_name() const {
	return "OSX";
}

void DisplayServerOSX::global_menu_add_item(const String &p_menu_root, const String &p_label, const Callable &p_callback, const Variant &p_tag) {
	_THREAD_SAFE_METHOD_

	NSMenu *menu = _get_menu_root(p_menu_root);
	if (menu) {
		NSMenuItem *menu_item = [menu addItemWithTitle:[NSString stringWithUTF8String:p_label.utf8().get_data()] action:@selector(globalMenuCallback:) keyEquivalent:@""];
		GodotMenuItem *obj = [[GodotMenuItem alloc] init];
		obj->callback = p_callback;
		obj->meta = p_tag;
		obj->checkable = false;
		[menu_item setRepresentedObject:obj];
	}
}

void DisplayServerOSX::global_menu_add_check_item(const String &p_menu_root, const String &p_label, const Callable &p_callback, const Variant &p_tag) {
	_THREAD_SAFE_METHOD_

	NSMenu *menu = _get_menu_root(p_menu_root);
	if (menu) {
		NSMenuItem *menu_item = [menu addItemWithTitle:[NSString stringWithUTF8String:p_label.utf8().get_data()] action:@selector(globalMenuCallback:) keyEquivalent:@""];
		GodotMenuItem *obj = [[GodotMenuItem alloc] init];
		obj->callback = p_callback;
		obj->meta = p_tag;
		obj->checkable = true;
		[menu_item setRepresentedObject:obj];
	}
}

void DisplayServerOSX::global_menu_add_submenu_item(const String &p_menu_root, const String &p_label, const String &p_submenu) {
	_THREAD_SAFE_METHOD_

	NSMenu *menu = _get_menu_root(p_menu_root);
	NSMenu *sub_menu = _get_menu_root(p_submenu);
	if (menu && sub_menu) {
		if (sub_menu == menu) {
			ERR_PRINT("Can't set submenu to self!");
			return;
		}
		if ([sub_menu supermenu]) {
			ERR_PRINT("Can't set submenu to menu that is already a submenu of some other menu!");
			return;
		}
		NSMenuItem *menu_item = [menu addItemWithTitle:[NSString stringWithUTF8String:p_label.utf8().get_data()] action:nil keyEquivalent:@""];
		[menu setSubmenu:sub_menu forItem:menu_item];
	}
}

void DisplayServerOSX::global_menu_add_separator(const String &p_menu_root) {
	_THREAD_SAFE_METHOD_

	NSMenu *menu = _get_menu_root(p_menu_root);
	if (menu) {
		[menu addItem:[NSMenuItem separatorItem]];
	}
}

bool DisplayServerOSX::global_menu_is_item_checked(const String &p_menu_root, int p_idx) const {
	_THREAD_SAFE_METHOD_

	const NSMenu *menu = _get_menu_root(p_menu_root);
	if (menu) {
		const NSMenuItem *menu_item = [menu itemAtIndex:p_idx];
		if (menu_item) {
			return ([menu_item state] == NSControlStateValueOn);
		}
	}
	return false;
}

bool DisplayServerOSX::global_menu_is_item_checkable(const String &p_menu_root, int p_idx) const {
	_THREAD_SAFE_METHOD_

	const NSMenu *menu = _get_menu_root(p_menu_root);
	if (menu) {
		const NSMenuItem *menu_item = [menu itemAtIndex:p_idx];
		if (menu_item) {
			GodotMenuItem *obj = [menu_item representedObject];
			if (obj) {
				return obj->checkable;
			}
		}
	}
	return false;
}

Callable DisplayServerOSX::global_menu_get_item_callback(const String &p_menu_root, int p_idx) {
	_THREAD_SAFE_METHOD_

	const NSMenu *menu = _get_menu_root(p_menu_root);
	if (menu) {
		const NSMenuItem *menu_item = [menu itemAtIndex:p_idx];
		if (menu_item) {
			GodotMenuItem *obj = [menu_item representedObject];
			if (obj) {
				return obj->callback;
			}
		}
	}
	return Callable();
}

Variant DisplayServerOSX::global_menu_get_item_tag(const String &p_menu_root, int p_idx) {
	_THREAD_SAFE_METHOD_

	const NSMenu *menu = _get_menu_root(p_menu_root);
	if (menu) {
		const NSMenuItem *menu_item = [menu itemAtIndex:p_idx];
		if (menu_item) {
			GodotMenuItem *obj = [menu_item representedObject];
			if (obj) {
				return obj->meta;
			}
		}
	}
	return Variant();
}

String DisplayServerOSX::global_menu_get_item_text(const String &p_menu_root, int p_idx) {
	_THREAD_SAFE_METHOD_

	const NSMenu *menu = _get_menu_root(p_menu_root);
	if (menu) {
		const NSMenuItem *menu_item = [menu itemAtIndex:p_idx];
		if (menu_item) {
			String ret;
			ret.parse_utf8([[menu_item title] UTF8String]);
			return ret;
		}
	}
	return String();
}

String DisplayServerOSX::global_menu_get_item_submenu(const String &p_menu_root, int p_idx) {
	_THREAD_SAFE_METHOD_

	const NSMenu *menu = _get_menu_root(p_menu_root);
	if (menu) {
		const NSMenuItem *menu_item = [menu itemAtIndex:p_idx];
		if (menu_item) {
			const NSMenu *sub_menu = [menu_item submenu];
			if (sub_menu) {
				for (Map<String, NSMenu *>::Element *E = submenu.front(); E; E = E->next()) {
					if (E->get() == sub_menu) {
						return E->key();
					}
				}
			}
		}
	}
	return String();
}

void DisplayServerOSX::global_menu_set_item_checked(const String &p_menu_root, int p_idx, bool p_checked) {
	_THREAD_SAFE_METHOD_

	NSMenu *menu = _get_menu_root(p_menu_root);
	if (menu) {
		if ((menu == [NSApp mainMenu]) && (p_idx == 0)) { // Do not edit Apple menu.
			return;
		}
		NSMenuItem *menu_item = [menu itemAtIndex:p_idx];
		if (menu_item) {
			if (p_checked) {
				[menu_item setState:NSControlStateValueOn];
			} else {
				[menu_item setState:NSControlStateValueOff];
			}
		}
	}
}

void DisplayServerOSX::global_menu_set_item_checkable(const String &p_menu_root, int p_idx, bool p_checkable) {
	_THREAD_SAFE_METHOD_

	NSMenu *menu = _get_menu_root(p_menu_root);
	if (menu) {
		if ((menu == [NSApp mainMenu]) && (p_idx == 0)) { // Do not edit Apple menu.
			return;
		}
		NSMenuItem *menu_item = [menu itemAtIndex:p_idx];
		if (menu_item) {
			GodotMenuItem *obj = [menu_item representedObject];
			obj->checkable = p_checkable;
		}
	}
}

void DisplayServerOSX::global_menu_set_item_callback(const String &p_menu_root, int p_idx, const Callable &p_callback) {
	_THREAD_SAFE_METHOD_

	NSMenu *menu = _get_menu_root(p_menu_root);
	if (menu) {
		if ((menu == [NSApp mainMenu]) && (p_idx == 0)) { // Do not edit Apple menu.
			return;
		}
		NSMenuItem *menu_item = [menu itemAtIndex:p_idx];
		if (menu_item) {
			GodotMenuItem *obj = [menu_item representedObject];
			obj->callback = p_callback;
		}
	}
}

void DisplayServerOSX::global_menu_set_item_tag(const String &p_menu_root, int p_idx, const Variant &p_tag) {
	_THREAD_SAFE_METHOD_

	NSMenu *menu = _get_menu_root(p_menu_root);
	if (menu) {
		if ((menu == [NSApp mainMenu]) && (p_idx == 0)) { // Do not edit Apple menu.
			return;
		}
		NSMenuItem *menu_item = [menu itemAtIndex:p_idx];
		if (menu_item) {
			GodotMenuItem *obj = [menu_item representedObject];
			obj->meta = p_tag;
		}
	}
}

void DisplayServerOSX::global_menu_set_item_text(const String &p_menu_root, int p_idx, const String &p_text) {
	_THREAD_SAFE_METHOD_

	NSMenu *menu = _get_menu_root(p_menu_root);
	if (menu) {
		if ((menu == [NSApp mainMenu]) && (p_idx == 0)) { // Do not edit Apple menu.
			return;
		}
		NSMenuItem *menu_item = [menu itemAtIndex:p_idx];
		if (menu_item) {
			[menu_item setTitle:[NSString stringWithUTF8String:p_text.utf8().get_data()]];
		}
	}
}

void DisplayServerOSX::global_menu_set_item_submenu(const String &p_menu_root, int p_idx, const String &p_submenu) {
	_THREAD_SAFE_METHOD_

	NSMenu *menu = _get_menu_root(p_menu_root);
	NSMenu *sub_menu = _get_menu_root(p_submenu);
	if (menu && sub_menu) {
		if (sub_menu == menu) {
			ERR_PRINT("Can't set submenu to self!");
			return;
		}
		if ([sub_menu supermenu]) {
			ERR_PRINT("Can't set submenu to menu that is already a submenu of some other menu!");
			return;
		}
		if ((menu == [NSApp mainMenu]) && (p_idx == 0)) { // Do not edit Apple menu.
			return;
		}
		NSMenuItem *menu_item = [menu itemAtIndex:p_idx];
		if (menu_item) {
			[menu setSubmenu:sub_menu forItem:menu_item];
		}
	}
}

int DisplayServerOSX::global_menu_get_item_count(const String &p_menu_root) const {
	_THREAD_SAFE_METHOD_

	const NSMenu *menu = _get_menu_root(p_menu_root);
	if (menu) {
		return [menu numberOfItems];
	} else {
		return 0;
	}
}

void DisplayServerOSX::global_menu_remove_item(const String &p_menu_root, int p_idx) {
	_THREAD_SAFE_METHOD_

	NSMenu *menu = _get_menu_root(p_menu_root);
	if (menu) {
		if ((menu == [NSApp mainMenu]) && (p_idx == 0)) { // Do not delete Apple menu.
			return;
		}
		[menu removeItemAtIndex:p_idx];
	}
}

void DisplayServerOSX::global_menu_clear(const String &p_menu_root) {
	_THREAD_SAFE_METHOD_

	NSMenu *menu = _get_menu_root(p_menu_root);
	if (menu) {
		[menu removeAllItems];
		// Restore Apple menu.
		if (menu == [NSApp mainMenu]) {
			NSMenuItem *menu_item = [menu addItemWithTitle:@"" action:nil keyEquivalent:@""];
			[menu setSubmenu:apple_menu forItem:menu_item];
		}
	}
}

Error DisplayServerOSX::dialog_show(String p_title, String p_description, Vector<String> p_buttons, const Callable &p_callback) {
	_THREAD_SAFE_METHOD_

	NSAlert *window = [[NSAlert alloc] init];
	NSString *ns_title = [NSString stringWithUTF8String:p_title.utf8().get_data()];
	NSString *ns_description = [NSString stringWithUTF8String:p_description.utf8().get_data()];

	for (int i = 0; i < p_buttons.size(); i++) {
		NSString *ns_button = [NSString stringWithUTF8String:p_buttons[i].utf8().get_data()];
		[window addButtonWithTitle:ns_button];
	}
	[window setMessageText:ns_title];
	[window setInformativeText:ns_description];
	[window setAlertStyle:NSAlertStyleInformational];

	int button_pressed;
	NSInteger ret = [window runModal];
	if (ret == NSAlertFirstButtonReturn) {
		button_pressed = 0;
	} else if (ret == NSAlertSecondButtonReturn) {
		button_pressed = 1;
	} else if (ret == NSAlertThirdButtonReturn) {
		button_pressed = 2;
	} else {
		button_pressed = 2 + (ret - NSAlertThirdButtonReturn);
	}

	if (!p_callback.is_null()) {
		Variant button = button_pressed;
		Variant *buttonp = &button;
		Variant ret;
		Callable::CallError ce;
		p_callback.call((const Variant **)&buttonp, 1, ret, ce);
	}

	return OK;
}

Error DisplayServerOSX::dialog_input_text(String p_title, String p_description, String p_partial, const Callable &p_callback) {
	_THREAD_SAFE_METHOD_

	NSAlert *window = [[NSAlert alloc] init];
	NSString *ns_title = [NSString stringWithUTF8String:p_title.utf8().get_data()];
	NSString *ns_description = [NSString stringWithUTF8String:p_description.utf8().get_data()];
	NSTextField *input = [[NSTextField alloc] initWithFrame:NSMakeRect(0, 0, 250, 30)];

	[window addButtonWithTitle:@"OK"];
	[window setMessageText:ns_title];
	[window setInformativeText:ns_description];
	[window setAlertStyle:NSAlertStyleInformational];

	[input setStringValue:[NSString stringWithUTF8String:p_partial.utf8().get_data()]];
	[window setAccessoryView:input];

	[window runModal];

	String ret;
	ret.parse_utf8([[input stringValue] UTF8String]);

	if (!p_callback.is_null()) {
		Variant text = ret;
		Variant *textp = &text;
		Variant ret;
		Callable::CallError ce;
		p_callback.call((const Variant **)&textp, 1, ret, ce);
	}

	return OK;
}

void DisplayServerOSX::mouse_set_mode(MouseMode p_mode) {
	_THREAD_SAFE_METHOD_

	if (p_mode == mouse_mode) {
		return;
	}

	WindowID window_id = windows.has(last_focused_window) ? last_focused_window : MAIN_WINDOW_ID;
	WindowData &wd = windows[window_id];
	if (p_mode == MOUSE_MODE_CAPTURED) {
		// Apple Docs state that the display parameter is not used.
		// "This parameter is not used. By default, you may pass kCGDirectMainDisplay."
		// https://developer.apple.com/library/mac/documentation/graphicsimaging/reference/Quartz_Services_Ref/Reference/reference.html
		if (mouse_mode == MOUSE_MODE_VISIBLE || mouse_mode == MOUSE_MODE_CONFINED) {
			CGDisplayHideCursor(kCGDirectMainDisplay);
		}
		CGAssociateMouseAndMouseCursorPosition(false);
		[wd.window_object setMovable:NO];
		const NSRect contentRect = [wd.window_view frame];
		NSRect pointInWindowRect = NSMakeRect(contentRect.size.width / 2, contentRect.size.height / 2, 0, 0);
		NSPoint pointOnScreen = [[wd.window_view window] convertRectToScreen:pointInWindowRect].origin;
		CGPoint lMouseWarpPos = { pointOnScreen.x, CGDisplayBounds(CGMainDisplayID()).size.height - pointOnScreen.y };
		CGWarpMouseCursorPosition(lMouseWarpPos);
	} else if (p_mode == MOUSE_MODE_HIDDEN) {
		if (mouse_mode == MOUSE_MODE_VISIBLE || mouse_mode == MOUSE_MODE_CONFINED) {
			CGDisplayHideCursor(kCGDirectMainDisplay);
		}
		[wd.window_object setMovable:YES];
		CGAssociateMouseAndMouseCursorPosition(true);
	} else if (p_mode == MOUSE_MODE_CONFINED) {
		CGDisplayShowCursor(kCGDirectMainDisplay);
		[wd.window_object setMovable:NO];
		CGAssociateMouseAndMouseCursorPosition(false);
	} else if (p_mode == MOUSE_MODE_CONFINED_HIDDEN) {
		if (mouse_mode == MOUSE_MODE_VISIBLE || mouse_mode == MOUSE_MODE_CONFINED) {
			CGDisplayHideCursor(kCGDirectMainDisplay);
		}
		[wd.window_object setMovable:NO];
		CGAssociateMouseAndMouseCursorPosition(false);
	} else { // MOUSE_MODE_VISIBLE
		CGDisplayShowCursor(kCGDirectMainDisplay);
		[wd.window_object setMovable:YES];
		CGAssociateMouseAndMouseCursorPosition(true);
	}

	last_warp = [[NSProcessInfo processInfo] systemUptime];
	ignore_warp = true;
	warp_events.clear();
	mouse_mode = p_mode;

	if (mouse_mode == MOUSE_MODE_VISIBLE || mouse_mode == MOUSE_MODE_CONFINED) {
		cursor_update_shape();
	}
}

DisplayServer::MouseMode DisplayServerOSX::mouse_get_mode() const {
	return mouse_mode;
}

bool DisplayServerOSX::update_mouse_wrap(WindowData &p_wd, NSPoint &r_delta, NSPoint &r_mpos, NSTimeInterval p_timestamp) {
	_THREAD_SAFE_METHOD_

	if (ignore_warp) {
		// Discard late events, before warp.
		if (p_timestamp < last_warp) {
			return true;
		}
		ignore_warp = false;
		return true;
	}

	if (mouse_mode == DisplayServer::MOUSE_MODE_CONFINED || mouse_mode == DisplayServer::MOUSE_MODE_CONFINED_HIDDEN) {
		// Discard late events.
		if (p_timestamp < last_warp) {
			return true;
		}

		// Warp affects next event delta, subtract previous warp deltas.
		List<WarpEvent>::Element *F = warp_events.front();
		while (F) {
			if (F->get().timestamp < p_timestamp) {
				List<DisplayServerOSX::WarpEvent>::Element *E = F;
				r_delta.x -= E->get().delta.x;
				r_delta.y -= E->get().delta.y;
				F = F->next();
				warp_events.erase(E);
			} else {
				F = F->next();
			}
		}

		// Confine mouse position to the window, and update delta.
		NSRect frame = [p_wd.window_object frame];
		NSPoint conf_pos = r_mpos;
		conf_pos.x = CLAMP(conf_pos.x + r_delta.x, 0.f, frame.size.width);
		conf_pos.y = CLAMP(conf_pos.y - r_delta.y, 0.f, frame.size.height);
		r_delta.x = conf_pos.x - r_mpos.x;
		r_delta.y = r_mpos.y - conf_pos.y;
		r_mpos = conf_pos;

		// Move mouse cursor.
		NSRect point_in_window_rect = NSMakeRect(conf_pos.x, conf_pos.y, 0, 0);
		conf_pos = [[p_wd.window_view window] convertRectToScreen:point_in_window_rect].origin;
		conf_pos.y = CGDisplayBounds(CGMainDisplayID()).size.height - conf_pos.y;
		CGWarpMouseCursorPosition(conf_pos);

		// Save warp data.
		last_warp = [[NSProcessInfo processInfo] systemUptime];

		DisplayServerOSX::WarpEvent ev;
		ev.timestamp = last_warp;
		ev.delta = r_delta;
		warp_events.push_back(ev);
	}

	return false;
}

void DisplayServerOSX::mouse_warp_to_position(const Point2i &p_to) {
	_THREAD_SAFE_METHOD_

	if (mouse_mode != MOUSE_MODE_CAPTURED) {
		WindowID window_id = windows.has(last_focused_window) ? last_focused_window : MAIN_WINDOW_ID;
		WindowData &wd = windows[window_id];

		// Local point in window coords.
		const NSRect contentRect = [wd.window_view frame];
		const float scale = screen_get_max_scale();
		NSRect pointInWindowRect = NSMakeRect(p_to.x / scale, contentRect.size.height - (p_to.y / scale - 1), 0, 0);
		NSPoint pointOnScreen = [[wd.window_view window] convertRectToScreen:pointInWindowRect].origin;

		// Point in scren coords.
		CGPoint lMouseWarpPos = { pointOnScreen.x, CGDisplayBounds(CGMainDisplayID()).size.height - pointOnScreen.y };

		// Do the warping.
		CGEventSourceRef lEventRef = CGEventSourceCreate(kCGEventSourceStateCombinedSessionState);
		CGEventSourceSetLocalEventsSuppressionInterval(lEventRef, 0.0);
		CGAssociateMouseAndMouseCursorPosition(false);
		CGWarpMouseCursorPosition(lMouseWarpPos);
		if (mouse_mode != MOUSE_MODE_CONFINED && mouse_mode != MOUSE_MODE_CONFINED_HIDDEN) {
			CGAssociateMouseAndMouseCursorPosition(true);
		}
	}
}

Point2i DisplayServerOSX::mouse_get_position() const {
	_THREAD_SAFE_METHOD_

	const NSPoint mouse_pos = [NSEvent mouseLocation];
	const float scale = screen_get_max_scale();

	for (NSScreen *screen in [NSScreen screens]) {
		NSRect frame = [screen frame];
		if (NSMouseInRect(mouse_pos, frame, NO)) {
			return Vector2i((int)mouse_pos.x, (int)-mouse_pos.y) * scale + _get_screens_origin();
		}
	}
	return Vector2i();
}

void DisplayServerOSX::mouse_set_button_state(MouseButton p_state) {
	last_button_state = p_state;
}

MouseButton DisplayServerOSX::mouse_get_button_state() const {
	return last_button_state;
}

void DisplayServerOSX::clipboard_set(const String &p_text) {
	_THREAD_SAFE_METHOD_

	NSString *copiedString = [NSString stringWithUTF8String:p_text.utf8().get_data()];
	NSArray *copiedStringArray = [NSArray arrayWithObject:copiedString];

	NSPasteboard *pasteboard = [NSPasteboard generalPasteboard];
	[pasteboard clearContents];
	[pasteboard writeObjects:copiedStringArray];
}

String DisplayServerOSX::clipboard_get() const {
	_THREAD_SAFE_METHOD_

	NSPasteboard *pasteboard = [NSPasteboard generalPasteboard];
	NSArray *classArray = [NSArray arrayWithObject:[NSString class]];
	NSDictionary *options = [NSDictionary dictionary];

	BOOL ok = [pasteboard canReadObjectForClasses:classArray options:options];

	if (!ok) {
		return "";
	}

	NSArray *objectsToPaste = [pasteboard readObjectsForClasses:classArray options:options];
	NSString *string = [objectsToPaste objectAtIndex:0];

	String ret;
	ret.parse_utf8([string UTF8String]);
	return ret;
}

int DisplayServerOSX::get_screen_count() const {
	_THREAD_SAFE_METHOD_

	NSArray *screenArray = [NSScreen screens];
	return [screenArray count];
}

Point2i DisplayServerOSX::screen_get_position(int p_screen) const {
	_THREAD_SAFE_METHOD_

	if (p_screen == SCREEN_OF_MAIN_WINDOW) {
		p_screen = window_get_current_screen();
	}

	Point2i position = _get_native_screen_position(p_screen) - _get_screens_origin();
	// OS X native y-coordinate relative to _get_screens_origin() is negative,
	// Godot expects a positive value.
	position.y *= -1;
	return position;
}

Size2i DisplayServerOSX::screen_get_size(int p_screen) const {
	_THREAD_SAFE_METHOD_

	if (p_screen == SCREEN_OF_MAIN_WINDOW) {
		p_screen = window_get_current_screen();
	}

	NSArray *screenArray = [NSScreen screens];
	if ((NSUInteger)p_screen < [screenArray count]) {
		// Note: Use frame to get the whole screen size.
		NSRect nsrect = [[screenArray objectAtIndex:p_screen] frame];
		return Size2i(nsrect.size.width, nsrect.size.height) * screen_get_max_scale();
	}

	return Size2i();
}

int DisplayServerOSX::screen_get_dpi(int p_screen) const {
	_THREAD_SAFE_METHOD_

	if (p_screen == SCREEN_OF_MAIN_WINDOW) {
		p_screen = window_get_current_screen();
	}

	NSArray *screenArray = [NSScreen screens];
	if ((NSUInteger)p_screen < [screenArray count]) {
		NSDictionary *description = [[screenArray objectAtIndex:p_screen] deviceDescription];

		const NSSize displayPixelSize = [[description objectForKey:NSDeviceSize] sizeValue];
		const CGSize displayPhysicalSize = CGDisplayScreenSize([[description objectForKey:@"NSScreenNumber"] unsignedIntValue]);
		float scale = [[screenArray objectAtIndex:p_screen] backingScaleFactor];

		float den2 = (displayPhysicalSize.width / 25.4f) * (displayPhysicalSize.width / 25.4f) + (displayPhysicalSize.height / 25.4f) * (displayPhysicalSize.height / 25.4f);
		if (den2 > 0.0f) {
			return ceil(sqrt(displayPixelSize.width * displayPixelSize.width + displayPixelSize.height * displayPixelSize.height) / sqrt(den2) * scale);
		}
	}

	return 72;
}

float DisplayServerOSX::screen_get_scale(int p_screen) const {
	_THREAD_SAFE_METHOD_

	if (p_screen == SCREEN_OF_MAIN_WINDOW) {
		p_screen = window_get_current_screen();
	}
	if (OS::get_singleton()->is_hidpi_allowed()) {
		NSArray *screenArray = [NSScreen screens];
		if ((NSUInteger)p_screen < [screenArray count]) {
			if ([[screenArray objectAtIndex:p_screen] respondsToSelector:@selector(backingScaleFactor)]) {
				return fmax(1.0, [[screenArray objectAtIndex:p_screen] backingScaleFactor]);
			}
		}
	}

	return 1.f;
}

float DisplayServerOSX::screen_get_max_scale() const {
	_THREAD_SAFE_METHOD_

	// Note: Do not update max display scale on screen configuration change, existing editor windows can't be rescaled on the fly.
	return display_max_scale;
}

Rect2i DisplayServerOSX::screen_get_usable_rect(int p_screen) const {
	_THREAD_SAFE_METHOD_

	if (p_screen == SCREEN_OF_MAIN_WINDOW) {
		p_screen = window_get_current_screen();
	}

	NSArray *screenArray = [NSScreen screens];
	if ((NSUInteger)p_screen < [screenArray count]) {
		const float scale = screen_get_max_scale();
		NSRect nsrect = [[screenArray objectAtIndex:p_screen] visibleFrame];

		Point2i position = Point2i(nsrect.origin.x, nsrect.origin.y + nsrect.size.height) * scale - _get_screens_origin();
		position.y *= -1;
		Size2i size = Size2i(nsrect.size.width, nsrect.size.height) * scale;

		return Rect2i(position, size);
	}

	return Rect2i();
}

float DisplayServerOSX::screen_get_refresh_rate(int p_screen) const {
	_THREAD_SAFE_METHOD_

	if (p_screen == SCREEN_OF_MAIN_WINDOW) {
		p_screen = window_get_current_screen();
	}

	NSArray *screenArray = [NSScreen screens];
	if ((NSUInteger)p_screen < [screenArray count]) {
		NSDictionary *description = [[screenArray objectAtIndex:p_screen] deviceDescription];
		const CGDisplayModeRef displayMode = CGDisplayCopyDisplayMode([[description objectForKey:@"NSScreenNumber"] unsignedIntValue]);
		const double displayRefreshRate = CGDisplayModeGetRefreshRate(displayMode);
		return (float)displayRefreshRate;
	}
	ERR_PRINT("An error occurred while trying to get the screen refresh rate.");
	return SCREEN_REFRESH_RATE_FALLBACK;
}

Vector<DisplayServer::WindowID> DisplayServerOSX::get_window_list() const {
	_THREAD_SAFE_METHOD_

	Vector<int> ret;
	for (Map<WindowID, WindowData>::Element *E = windows.front(); E; E = E->next()) {
		ret.push_back(E->key());
	}
	return ret;
}

DisplayServer::WindowID DisplayServerOSX::create_sub_window(WindowMode p_mode, VSyncMode p_vsync_mode, uint32_t p_flags, const Rect2i &p_rect) {
	_THREAD_SAFE_METHOD_

	WindowID id = _create_window(p_mode, p_vsync_mode, p_rect);
	for (int i = 0; i < WINDOW_FLAG_MAX; i++) {
		if (p_flags & (1 << i)) {
			window_set_flag(WindowFlags(i), true, id);
		}
	}

	return id;
}

void DisplayServerOSX::show_window(WindowID p_id) {
	WindowData &wd = windows[p_id];

	popup_open(p_id);
	if (wd.no_focus || wd.is_popup) {
		[wd.window_object orderFront:nil];
	} else {
		[wd.window_object makeKeyAndOrderFront:nil];
	}
}

void DisplayServerOSX::delete_sub_window(WindowID p_id) {
	_THREAD_SAFE_METHOD_

	ERR_FAIL_COND(!windows.has(p_id));
	ERR_FAIL_COND_MSG(p_id == MAIN_WINDOW_ID, "Main window can't be deleted");

	WindowData &wd = windows[p_id];

	[wd.window_object setContentView:nil];
	[wd.window_object close];
}

void DisplayServerOSX::window_set_rect_changed_callback(const Callable &p_callable, WindowID p_window) {
	_THREAD_SAFE_METHOD_

	ERR_FAIL_COND(!windows.has(p_window));
	WindowData &wd = windows[p_window];
	wd.rect_changed_callback = p_callable;
}

void DisplayServerOSX::window_set_window_event_callback(const Callable &p_callable, WindowID p_window) {
	_THREAD_SAFE_METHOD_

	ERR_FAIL_COND(!windows.has(p_window));
	WindowData &wd = windows[p_window];
	wd.event_callback = p_callable;
}

void DisplayServerOSX::window_set_input_event_callback(const Callable &p_callable, WindowID p_window) {
	_THREAD_SAFE_METHOD_

	ERR_FAIL_COND(!windows.has(p_window));
	WindowData &wd = windows[p_window];
	wd.input_event_callback = p_callable;
}

void DisplayServerOSX::window_set_input_text_callback(const Callable &p_callable, WindowID p_window) {
	_THREAD_SAFE_METHOD_
	ERR_FAIL_COND(!windows.has(p_window));
	WindowData &wd = windows[p_window];
	wd.input_text_callback = p_callable;
}

void DisplayServerOSX::window_set_drop_files_callback(const Callable &p_callable, WindowID p_window) {
	_THREAD_SAFE_METHOD_
	ERR_FAIL_COND(!windows.has(p_window));
	WindowData &wd = windows[p_window];
	wd.drop_files_callback = p_callable;
}

void DisplayServerOSX::window_set_title(const String &p_title, WindowID p_window) {
	_THREAD_SAFE_METHOD_

	ERR_FAIL_COND(!windows.has(p_window));
	WindowData &wd = windows[p_window];

	[wd.window_object setTitle:[NSString stringWithUTF8String:p_title.utf8().get_data()]];
}

void DisplayServerOSX::window_set_mouse_passthrough(const Vector<Vector2> &p_region, WindowID p_window) {
	_THREAD_SAFE_METHOD_

	ERR_FAIL_COND(!windows.has(p_window));
	WindowData &wd = windows[p_window];

	wd.mpath = p_region;
}

int DisplayServerOSX::window_get_current_screen(WindowID p_window) const {
	_THREAD_SAFE_METHOD_
	ERR_FAIL_COND_V(!windows.has(p_window), -1);
	const WindowData &wd = windows[p_window];

	const NSUInteger index = [[NSScreen screens] indexOfObject:[wd.window_object screen]];
	return (index == NSNotFound) ? 0 : index;
}

void DisplayServerOSX::window_set_current_screen(int p_screen, WindowID p_window) {
	_THREAD_SAFE_METHOD_

	ERR_FAIL_COND(!windows.has(p_window));
	WindowData &wd = windows[p_window];

	bool was_fullscreen = false;
	if (wd.fullscreen) {
		// Temporary exit fullscreen mode to move window.
		[wd.window_object toggleFullScreen:nil];
		was_fullscreen = true;
	}

	Point2i wpos = window_get_position(p_window) - screen_get_position(window_get_current_screen(p_window));
	window_set_position(wpos + screen_get_position(p_screen), p_window);

	if (was_fullscreen) {
		// Re-enter fullscreen mode.
		[wd.window_object toggleFullScreen:nil];
	}
}

void DisplayServerOSX::window_set_exclusive(WindowID p_window, bool p_exclusive) {
	_THREAD_SAFE_METHOD_
	ERR_FAIL_COND(!windows.has(p_window));
	WindowData &wd = windows[p_window];
	if (wd.exclusive != p_exclusive) {
		wd.exclusive = p_exclusive;
		if (wd.transient_parent != INVALID_WINDOW_ID) {
			WindowData &wd_parent = windows[wd.transient_parent];
			if (wd.exclusive) {
				ERR_FAIL_COND_MSG([[wd_parent.window_object childWindows] count] > 0, "Transient parent has another exclusive child.");
				[wd_parent.window_object addChildWindow:wd.window_object ordered:NSWindowAbove];
			} else {
				[wd_parent.window_object removeChildWindow:wd.window_object];
			}
		}
	}
}

Point2i DisplayServerOSX::window_get_position(WindowID p_window) const {
	_THREAD_SAFE_METHOD_

	ERR_FAIL_COND_V(!windows.has(p_window), Point2i());
	const WindowData &wd = windows[p_window];

	// Use content rect position (without titlebar / window border).
	const NSRect contentRect = [wd.window_view frame];
	const NSRect nsrect = [wd.window_object convertRectToScreen:contentRect];
	Point2i pos;

	// Return the position of the top-left corner, for OS X the y starts at the bottom.
	const float scale = screen_get_max_scale();
	pos.x = nsrect.origin.x;
	pos.y = (nsrect.origin.y + nsrect.size.height);
	pos *= scale;
	pos -= _get_screens_origin();
	// OS X native y-coordinate relative to _get_screens_origin() is negative,
	// Godot expects a positive value.
	pos.y *= -1;
	return pos;
}

void DisplayServerOSX::window_set_position(const Point2i &p_position, WindowID p_window) {
	_THREAD_SAFE_METHOD_

	ERR_FAIL_COND(!windows.has(p_window));
	WindowData &wd = windows[p_window];

	Point2i position = p_position;
	// OS X native y-coordinate relative to _get_screens_origin() is negative,
	// Godot passes a positive value.
	position.y *= -1;
	position += _get_screens_origin();
	position /= screen_get_max_scale();

	// Remove titlebar / window border size.
	const NSRect contentRect = [wd.window_view frame];
	const NSRect windowRect = [wd.window_object frame];
	const NSRect nsrect = [wd.window_object convertRectToScreen:contentRect];
	Point2i offset;
	offset.x = (nsrect.origin.x - windowRect.origin.x);
	offset.y = (nsrect.origin.y + nsrect.size.height);
	offset.y -= (windowRect.origin.y + windowRect.size.height);

	[wd.window_object setFrameTopLeftPoint:NSMakePoint(position.x - offset.x, position.y - offset.y)];

	_update_window_style(wd);
	update_mouse_pos(wd, [wd.window_object mouseLocationOutsideOfEventStream]);
}

void DisplayServerOSX::window_set_transient(WindowID p_window, WindowID p_parent) {
	_THREAD_SAFE_METHOD_
	ERR_FAIL_COND(p_window == p_parent);

	ERR_FAIL_COND(!windows.has(p_window));
	WindowData &wd_window = windows[p_window];

	ERR_FAIL_COND(wd_window.transient_parent == p_parent);

	ERR_FAIL_COND_MSG(wd_window.on_top, "Windows with the 'on top' can't become transient.");
	if (p_parent == INVALID_WINDOW_ID) {
		// Remove transient.
		ERR_FAIL_COND(wd_window.transient_parent == INVALID_WINDOW_ID);
		ERR_FAIL_COND(!windows.has(wd_window.transient_parent));

		WindowData &wd_parent = windows[wd_window.transient_parent];

		wd_window.transient_parent = INVALID_WINDOW_ID;
		wd_parent.transient_children.erase(p_window);
		[wd_window.window_object setCollectionBehavior:NSWindowCollectionBehaviorFullScreenPrimary];

		if (wd_window.exclusive) {
			[wd_parent.window_object removeChildWindow:wd_window.window_object];
		}
	} else {
		ERR_FAIL_COND(!windows.has(p_parent));
		ERR_FAIL_COND_MSG(wd_window.transient_parent != INVALID_WINDOW_ID, "Window already has a transient parent");
		WindowData &wd_parent = windows[p_parent];

		wd_window.transient_parent = p_parent;
		wd_parent.transient_children.insert(p_window);
		[wd_window.window_object setCollectionBehavior:NSWindowCollectionBehaviorFullScreenAuxiliary];

		if (wd_window.exclusive) {
			[wd_parent.window_object addChildWindow:wd_window.window_object ordered:NSWindowAbove];
		}
	}
}

void DisplayServerOSX::window_set_max_size(const Size2i p_size, WindowID p_window) {
	_THREAD_SAFE_METHOD_

	ERR_FAIL_COND(!windows.has(p_window));
	WindowData &wd = windows[p_window];

	if ((p_size != Size2i()) && ((p_size.x < wd.min_size.x) || (p_size.y < wd.min_size.y))) {
		ERR_PRINT("Maximum window size can't be smaller than minimum window size!");
		return;
	}
	wd.max_size = p_size;

	if ((wd.max_size != Size2i()) && !wd.fullscreen) {
		Size2i size = wd.max_size / screen_get_max_scale();
		[wd.window_object setContentMaxSize:NSMakeSize(size.x, size.y)];
	} else {
		[wd.window_object setContentMaxSize:NSMakeSize(FLT_MAX, FLT_MAX)];
	}
}

Size2i DisplayServerOSX::window_get_max_size(WindowID p_window) const {
	_THREAD_SAFE_METHOD_

	ERR_FAIL_COND_V(!windows.has(p_window), Size2i());
	const WindowData &wd = windows[p_window];
	return wd.max_size;
}

void DisplayServerOSX::window_set_min_size(const Size2i p_size, WindowID p_window) {
	_THREAD_SAFE_METHOD_

	ERR_FAIL_COND(!windows.has(p_window));
	WindowData &wd = windows[p_window];

	if ((p_size != Size2i()) && (wd.max_size != Size2i()) && ((p_size.x > wd.max_size.x) || (p_size.y > wd.max_size.y))) {
		ERR_PRINT("Minimum window size can't be larger than maximum window size!");
		return;
	}
	wd.min_size = p_size;

	if ((wd.min_size != Size2i()) && !wd.fullscreen) {
		Size2i size = wd.min_size / screen_get_max_scale();
		[wd.window_object setContentMinSize:NSMakeSize(size.x, size.y)];
	} else {
		[wd.window_object setContentMinSize:NSMakeSize(0, 0)];
	}
}

Size2i DisplayServerOSX::window_get_min_size(WindowID p_window) const {
	_THREAD_SAFE_METHOD_

	ERR_FAIL_COND_V(!windows.has(p_window), Size2i());
	const WindowData &wd = windows[p_window];

	return wd.min_size;
}

void DisplayServerOSX::window_set_size(const Size2i p_size, WindowID p_window) {
	_THREAD_SAFE_METHOD_

	ERR_FAIL_COND(!windows.has(p_window));
	WindowData &wd = windows[p_window];

	Size2i size = p_size / screen_get_max_scale();

	NSPoint top_left;
	NSRect old_frame = [wd.window_object frame];
	top_left.x = old_frame.origin.x;
	top_left.y = NSMaxY(old_frame);

	NSRect new_frame = NSMakeRect(0, 0, size.x, size.y);
	new_frame = [wd.window_object frameRectForContentRect:new_frame];

	new_frame.origin.x = top_left.x;
	new_frame.origin.y = top_left.y - new_frame.size.height;

	[wd.window_object setFrame:new_frame display:YES];

	_update_window_style(wd);
}

Size2i DisplayServerOSX::window_get_size(WindowID p_window) const {
	_THREAD_SAFE_METHOD_

	ERR_FAIL_COND_V(!windows.has(p_window), Size2i());
	const WindowData &wd = windows[p_window];
	return wd.size;
}

Size2i DisplayServerOSX::window_get_real_size(WindowID p_window) const {
	_THREAD_SAFE_METHOD_

	ERR_FAIL_COND_V(!windows.has(p_window), Size2i());
	const WindowData &wd = windows[p_window];
	NSRect frame = [wd.window_object frame];
	return Size2i(frame.size.width, frame.size.height) * screen_get_max_scale();
}

void DisplayServerOSX::window_set_mode(WindowMode p_mode, WindowID p_window) {
	_THREAD_SAFE_METHOD_

	ERR_FAIL_COND(!windows.has(p_window));
	WindowData &wd = windows[p_window];

	WindowMode old_mode = window_get_mode(p_window);
	if (old_mode == p_mode) {
		return; // Do nothing.
	}

	switch (old_mode) {
		case WINDOW_MODE_WINDOWED: {
			// Do nothing.
		} break;
		case WINDOW_MODE_MINIMIZED: {
			[wd.window_object deminiaturize:nil];
		} break;
		case WINDOW_MODE_EXCLUSIVE_FULLSCREEN:
		case WINDOW_MODE_FULLSCREEN: {
			[wd.window_object setLevel:NSNormalWindowLevel];
			_set_window_per_pixel_transparency_enabled(true, p_window);
			if (wd.resize_disabled) { // Restore resize disabled.
				[wd.window_object setStyleMask:[wd.window_object styleMask] & ~NSWindowStyleMaskResizable];
			}
			if (wd.min_size != Size2i()) {
				Size2i size = wd.min_size / screen_get_max_scale();
				[wd.window_object setContentMinSize:NSMakeSize(size.x, size.y)];
			}
			if (wd.max_size != Size2i()) {
				Size2i size = wd.max_size / screen_get_max_scale();
				[wd.window_object setContentMaxSize:NSMakeSize(size.x, size.y)];
			}
			[wd.window_object toggleFullScreen:nil];
			wd.fullscreen = false;
		} break;
		case WINDOW_MODE_MAXIMIZED: {
			if ([wd.window_object isZoomed]) {
				[wd.window_object zoom:nil];
			}
		} break;
	}

	switch (p_mode) {
		case WINDOW_MODE_WINDOWED: {
			// Do nothing.
		} break;
		case WINDOW_MODE_MINIMIZED: {
			[wd.window_object performMiniaturize:nil];
		} break;
		case WINDOW_MODE_EXCLUSIVE_FULLSCREEN:
		case WINDOW_MODE_FULLSCREEN: {
			_set_window_per_pixel_transparency_enabled(false, p_window);
			if (wd.resize_disabled) { // Fullscreen window should be resizable to work.
				[wd.window_object setStyleMask:[wd.window_object styleMask] | NSWindowStyleMaskResizable];
			}
			[wd.window_object setContentMinSize:NSMakeSize(0, 0)];
			[wd.window_object setContentMaxSize:NSMakeSize(FLT_MAX, FLT_MAX)];
			[wd.window_object toggleFullScreen:nil];
			wd.fullscreen = true;
		} break;
		case WINDOW_MODE_MAXIMIZED: {
			if (![wd.window_object isZoomed]) {
				[wd.window_object zoom:nil];
			}
		} break;
	}
}

DisplayServer::WindowMode DisplayServerOSX::window_get_mode(WindowID p_window) const {
	_THREAD_SAFE_METHOD_

	ERR_FAIL_COND_V(!windows.has(p_window), WINDOW_MODE_WINDOWED);
	const WindowData &wd = windows[p_window];

	if (wd.fullscreen) { // If fullscreen, it's not in another mode.
		return WINDOW_MODE_FULLSCREEN;
	}
	if ([wd.window_object isZoomed] && !wd.resize_disabled) {
		return WINDOW_MODE_MAXIMIZED;
	}
	if ([wd.window_object respondsToSelector:@selector(isMiniaturized)]) {
		if ([wd.window_object isMiniaturized]) {
			return WINDOW_MODE_MINIMIZED;
		}
	}

	// All other discarded, return windowed.
	return WINDOW_MODE_WINDOWED;
}

bool DisplayServerOSX::window_is_maximize_allowed(WindowID p_window) const {
	return true;
}

void DisplayServerOSX::window_set_flag(WindowFlags p_flag, bool p_enabled, WindowID p_window) {
	_THREAD_SAFE_METHOD_

	ERR_FAIL_COND(!windows.has(p_window));
	WindowData &wd = windows[p_window];

	switch (p_flag) {
		case WINDOW_FLAG_RESIZE_DISABLED: {
			wd.resize_disabled = p_enabled;
			if (wd.fullscreen) { // Fullscreen window should be resizable, style will be applied on exiting fullscreen.
				return;
			}
			if (p_enabled) {
				[wd.window_object setStyleMask:[wd.window_object styleMask] & ~NSWindowStyleMaskResizable];
			} else {
				[wd.window_object setStyleMask:[wd.window_object styleMask] | NSWindowStyleMaskResizable];
			}
		} break;
		case WINDOW_FLAG_BORDERLESS: {
			// OrderOut prevents a lose focus bug with the window.
			if ([wd.window_object isVisible]) {
				[wd.window_object orderOut:nil];
			}
			wd.borderless = p_enabled;
			if (p_enabled) {
				[wd.window_object setStyleMask:NSWindowStyleMaskBorderless];
			} else {
				_set_window_per_pixel_transparency_enabled(false, p_window);
				[wd.window_object setStyleMask:NSWindowStyleMaskTitled | NSWindowStyleMaskClosable | NSWindowStyleMaskMiniaturizable | (wd.resize_disabled ? 0 : NSWindowStyleMaskResizable)];
				// Force update of the window styles.
				NSRect frameRect = [wd.window_object frame];
				[wd.window_object setFrame:NSMakeRect(frameRect.origin.x, frameRect.origin.y, frameRect.size.width + 1, frameRect.size.height) display:NO];
				[wd.window_object setFrame:frameRect display:NO];
			}
			_update_window_style(wd);
			if ([wd.window_object isVisible]) {
				if (wd.no_focus || wd.is_popup) {
					[wd.window_object orderFront:nil];
				} else {
					[wd.window_object makeKeyAndOrderFront:nil];
				}
			}
		} break;
		case WINDOW_FLAG_ALWAYS_ON_TOP: {
			wd.on_top = p_enabled;
			if (wd.fullscreen) {
				return;
			}
			if (p_enabled) {
				[wd.window_object setLevel:NSFloatingWindowLevel];
			} else {
				[wd.window_object setLevel:NSNormalWindowLevel];
			}
		} break;
		case WINDOW_FLAG_TRANSPARENT: {
			if (p_enabled) {
				[wd.window_object setStyleMask:NSWindowStyleMaskBorderless]; // Force borderless.
			} else if (!wd.borderless) {
				[wd.window_object setStyleMask:NSWindowStyleMaskTitled | NSWindowStyleMaskClosable | NSWindowStyleMaskMiniaturizable | (wd.resize_disabled ? 0 : NSWindowStyleMaskResizable)];
			}
			_set_window_per_pixel_transparency_enabled(p_enabled, p_window);
		} break;
		case WINDOW_FLAG_NO_FOCUS: {
			wd.no_focus = p_enabled;
		} break;
		case WINDOW_FLAG_POPUP: {
			ERR_FAIL_COND_MSG(p_window == MAIN_WINDOW_ID, "Main window can't be popup.");
			ERR_FAIL_COND_MSG([wd.window_object isVisible] && (wd.is_popup != p_enabled), "Pupup flag can't changed while window is opened.");
			wd.is_popup = p_enabled;
		} break;
		default: {
		}
	}
}

bool DisplayServerOSX::window_get_flag(WindowFlags p_flag, WindowID p_window) const {
	_THREAD_SAFE_METHOD_

	ERR_FAIL_COND_V(!windows.has(p_window), false);
	const WindowData &wd = windows[p_window];

	switch (p_flag) {
		case WINDOW_FLAG_RESIZE_DISABLED: {
			return wd.resize_disabled;
		} break;
		case WINDOW_FLAG_BORDERLESS: {
			return [wd.window_object styleMask] == NSWindowStyleMaskBorderless;
		} break;
		case WINDOW_FLAG_ALWAYS_ON_TOP: {
			if (wd.fullscreen) {
				return wd.on_top;
			} else {
				return [wd.window_object level] == NSFloatingWindowLevel;
			}
		} break;
		case WINDOW_FLAG_TRANSPARENT: {
			return wd.layered_window;
		} break;
		case WINDOW_FLAG_NO_FOCUS: {
			return wd.no_focus;
		} break;
		case WINDOW_FLAG_POPUP: {
			return wd.is_popup;
		} break;
		default: {
		}
	}

	return false;
}

void DisplayServerOSX::window_request_attention(WindowID p_window) {
	// It's app global, ignore window id.
	[NSApp requestUserAttention:NSCriticalRequest];
}

void DisplayServerOSX::window_move_to_foreground(WindowID p_window) {
	_THREAD_SAFE_METHOD_

	ERR_FAIL_COND(!windows.has(p_window));
	const WindowData &wd = windows[p_window];

	[[NSApplication sharedApplication] activateIgnoringOtherApps:YES];
	if (wd.no_focus || wd.is_popup) {
		[wd.window_object orderFront:nil];
	} else {
		[wd.window_object makeKeyAndOrderFront:nil];
	}
}

bool DisplayServerOSX::window_can_draw(WindowID p_window) const {
	return window_get_mode(p_window) != WINDOW_MODE_MINIMIZED;
}

bool DisplayServerOSX::can_any_window_draw() const {
	_THREAD_SAFE_METHOD_

	for (Map<WindowID, WindowData>::Element *E = windows.front(); E; E = E->next()) {
		if (window_get_mode(E->key()) != WINDOW_MODE_MINIMIZED) {
			return true;
		}
	}
	return false;
}

void DisplayServerOSX::window_set_ime_active(const bool p_active, WindowID p_window) {
	_THREAD_SAFE_METHOD_

	ERR_FAIL_COND(!windows.has(p_window));
	WindowData &wd = windows[p_window];

	wd.im_active = p_active;

	if (!p_active) {
		[wd.window_view cancelComposition];
	}
}

void DisplayServerOSX::window_set_ime_position(const Point2i &p_pos, WindowID p_window) {
	_THREAD_SAFE_METHOD_

	ERR_FAIL_COND(!windows.has(p_window));
	WindowData &wd = windows[p_window];

	wd.im_position = p_pos;
}

DisplayServer::WindowID DisplayServerOSX::get_window_at_screen_position(const Point2i &p_position) const {
	Point2i position = p_position;
	position.y *= -1;
	position += _get_screens_origin();
	position /= screen_get_max_scale();

	NSInteger wnum = [NSWindow windowNumberAtPoint:NSMakePoint(position.x, position.y) belowWindowWithWindowNumber:0 /*topmost*/];
	for (Map<WindowID, WindowData>::Element *E = windows.front(); E; E = E->next()) {
		if ([E->get().window_object windowNumber] == wnum) {
			return E->key();
		}
	}
	return INVALID_WINDOW_ID;
}

int64_t DisplayServerOSX::window_get_native_handle(HandleType p_handle_type, WindowID p_window) const {
	ERR_FAIL_COND_V(!windows.has(p_window), 0);
	switch (p_handle_type) {
		case DISPLAY_HANDLE: {
			return 0; // Not supported.
		}
		case WINDOW_HANDLE: {
			return (int64_t)windows[p_window].window_object;
		}
		case WINDOW_VIEW: {
			return (int64_t)windows[p_window].window_view;
		}
		default: {
			return 0;
		}
	}
}

void DisplayServerOSX::window_attach_instance_id(ObjectID p_instance, WindowID p_window) {
	_THREAD_SAFE_METHOD_

	ERR_FAIL_COND(!windows.has(p_window));
	windows[p_window].instance_id = p_instance;
}

ObjectID DisplayServerOSX::window_get_attached_instance_id(WindowID p_window) const {
	_THREAD_SAFE_METHOD_

	ERR_FAIL_COND_V(!windows.has(p_window), ObjectID());
	return windows[p_window].instance_id;
}

void DisplayServerOSX::gl_window_make_current(DisplayServer::WindowID p_window_id) {
#if defined(GLES3_ENABLED)
	gl_manager->window_make_current(p_window_id);
#endif
}

void DisplayServerOSX::window_set_vsync_mode(DisplayServer::VSyncMode p_vsync_mode, WindowID p_window) {
	_THREAD_SAFE_METHOD_
#if defined(GLES3_ENABLED)
	if (gl_manager) {
		gl_manager->set_use_vsync(p_vsync_mode);
	}
#endif
#if defined(VULKAN_ENABLED)
	if (context_vulkan) {
		context_vulkan->set_vsync_mode(p_window, p_vsync_mode);
	}
#endif
}

DisplayServer::VSyncMode DisplayServerOSX::window_get_vsync_mode(WindowID p_window) const {
	_THREAD_SAFE_METHOD_
#if defined(GLES3_ENABLED)
	if (gl_manager) {
		return (gl_manager->is_using_vsync() ? DisplayServer::VSyncMode::VSYNC_ENABLED : DisplayServer::VSyncMode::VSYNC_DISABLED);
	}
#endif
#if defined(VULKAN_ENABLED)
	if (context_vulkan) {
		return context_vulkan->get_vsync_mode(p_window);
	}
#endif
	return DisplayServer::VSYNC_ENABLED;
}

Point2i DisplayServerOSX::ime_get_selection() const {
	return im_selection;
}

String DisplayServerOSX::ime_get_text() const {
	return im_text;
}

void DisplayServerOSX::cursor_update_shape() {
	_THREAD_SAFE_METHOD_

	if (cursors[cursor_shape] != nullptr) {
		[cursors[cursor_shape] set];
	} else {
		switch (cursor_shape) {
			case CURSOR_ARROW:
				[[NSCursor arrowCursor] set];
				break;
			case CURSOR_IBEAM:
				[[NSCursor IBeamCursor] set];
				break;
			case CURSOR_POINTING_HAND:
				[[NSCursor pointingHandCursor] set];
				break;
			case CURSOR_CROSS:
				[[NSCursor crosshairCursor] set];
				break;
			case CURSOR_WAIT:
				[[NSCursor arrowCursor] set];
				break;
			case CURSOR_BUSY:
				[[NSCursor arrowCursor] set];
				break;
			case CURSOR_DRAG:
				[[NSCursor closedHandCursor] set];
				break;
			case CURSOR_CAN_DROP:
				[[NSCursor openHandCursor] set];
				break;
			case CURSOR_FORBIDDEN:
				[[NSCursor operationNotAllowedCursor] set];
				break;
			case CURSOR_VSIZE:
				[_cursor_from_selector(@selector(_windowResizeNorthSouthCursor), @selector(resizeUpDownCursor)) set];
				break;
			case CURSOR_HSIZE:
				[_cursor_from_selector(@selector(_windowResizeEastWestCursor), @selector(resizeLeftRightCursor)) set];
				break;
			case CURSOR_BDIAGSIZE:
				[_cursor_from_selector(@selector(_windowResizeNorthEastSouthWestCursor)) set];
				break;
			case CURSOR_FDIAGSIZE:
				[_cursor_from_selector(@selector(_windowResizeNorthWestSouthEastCursor)) set];
				break;
			case CURSOR_MOVE:
				[[NSCursor arrowCursor] set];
				break;
			case CURSOR_VSPLIT:
				[[NSCursor resizeUpDownCursor] set];
				break;
			case CURSOR_HSPLIT:
				[[NSCursor resizeLeftRightCursor] set];
				break;
			case CURSOR_HELP:
				[_cursor_from_selector(@selector(_helpCursor)) set];
				break;
			default: {
			}
		}
	}
}

void DisplayServerOSX::cursor_set_shape(CursorShape p_shape) {
	_THREAD_SAFE_METHOD_

	ERR_FAIL_INDEX(p_shape, CURSOR_MAX);

	if (cursor_shape == p_shape) {
		return;
	}

	cursor_shape = p_shape;

	if (mouse_mode != MOUSE_MODE_VISIBLE && mouse_mode != MOUSE_MODE_CONFINED) {
		return;
	}

	cursor_update_shape();
}

DisplayServerOSX::CursorShape DisplayServerOSX::cursor_get_shape() const {
	return cursor_shape;
}

void DisplayServerOSX::cursor_set_custom_image(const RES &p_cursor, CursorShape p_shape, const Vector2 &p_hotspot) {
	_THREAD_SAFE_METHOD_

	if (p_cursor.is_valid()) {
		Map<CursorShape, Vector<Variant>>::Element *cursor_c = cursors_cache.find(p_shape);

		if (cursor_c) {
			if (cursor_c->get()[0] == p_cursor && cursor_c->get()[1] == p_hotspot) {
				cursor_set_shape(p_shape);
				return;
			}
			cursors_cache.erase(p_shape);
		}

		Ref<Texture2D> texture = p_cursor;
		Ref<AtlasTexture> atlas_texture = p_cursor;
		Ref<Image> image;
		Size2 texture_size;
		Rect2 atlas_rect;

		if (texture.is_valid()) {
			image = texture->get_image();
		}

		if (!image.is_valid() && atlas_texture.is_valid()) {
			texture = atlas_texture->get_atlas();

			atlas_rect.size.width = texture->get_width();
			atlas_rect.size.height = texture->get_height();
			atlas_rect.position.x = atlas_texture->get_region().position.x;
			atlas_rect.position.y = atlas_texture->get_region().position.y;

			texture_size.width = atlas_texture->get_region().size.x;
			texture_size.height = atlas_texture->get_region().size.y;
		} else if (image.is_valid()) {
			texture_size.width = texture->get_width();
			texture_size.height = texture->get_height();
		}

		ERR_FAIL_COND(!texture.is_valid());
		ERR_FAIL_COND(p_hotspot.x < 0 || p_hotspot.y < 0);
		ERR_FAIL_COND(texture_size.width > 256 || texture_size.height > 256);
		ERR_FAIL_COND(p_hotspot.x > texture_size.width || p_hotspot.y > texture_size.height);

		image = texture->get_image();

		ERR_FAIL_COND(!image.is_valid());

		NSBitmapImageRep *imgrep = [[NSBitmapImageRep alloc]
				initWithBitmapDataPlanes:nullptr
							  pixelsWide:int(texture_size.width)
							  pixelsHigh:int(texture_size.height)
						   bitsPerSample:8
						 samplesPerPixel:4
								hasAlpha:YES
								isPlanar:NO
						  colorSpaceName:NSDeviceRGBColorSpace
							 bytesPerRow:int(texture_size.width) * 4
							bitsPerPixel:32];

		ERR_FAIL_COND(imgrep == nil);
		uint8_t *pixels = [imgrep bitmapData];

		int len = int(texture_size.width * texture_size.height);

		for (int i = 0; i < len; i++) {
			int row_index = floor(i / texture_size.width) + atlas_rect.position.y;
			int column_index = (i % int(texture_size.width)) + atlas_rect.position.x;

			if (atlas_texture.is_valid()) {
				column_index = MIN(column_index, atlas_rect.size.width - 1);
				row_index = MIN(row_index, atlas_rect.size.height - 1);
			}

			uint32_t color = image->get_pixel(column_index, row_index).to_argb32();

			uint8_t alpha = (color >> 24) & 0xFF;
			pixels[i * 4 + 0] = ((color >> 16) & 0xFF) * alpha / 255;
			pixels[i * 4 + 1] = ((color >> 8) & 0xFF) * alpha / 255;
			pixels[i * 4 + 2] = ((color)&0xFF) * alpha / 255;
			pixels[i * 4 + 3] = alpha;
		}

		NSImage *nsimage = [[NSImage alloc] initWithSize:NSMakeSize(texture_size.width, texture_size.height)];
		[nsimage addRepresentation:imgrep];

		NSCursor *cursor = [[NSCursor alloc] initWithImage:nsimage hotSpot:NSMakePoint(p_hotspot.x, p_hotspot.y)];

		cursors[p_shape] = cursor;

		Vector<Variant> params;
		params.push_back(p_cursor);
		params.push_back(p_hotspot);
		cursors_cache.insert(p_shape, params);

		if (p_shape == cursor_shape) {
			if (mouse_mode == MOUSE_MODE_VISIBLE || mouse_mode == MOUSE_MODE_CONFINED) {
				[cursor set];
			}
		}
	} else {
		// Reset to default system cursor.
		if (cursors[p_shape] != nullptr) {
			cursors[p_shape] = nullptr;
		}

		cursor_update_shape();

		cursors_cache.erase(p_shape);
	}
}

bool DisplayServerOSX::get_swap_cancel_ok() {
	return false;
}

int DisplayServerOSX::keyboard_get_layout_count() const {
	if (keyboard_layout_dirty) {
		const_cast<DisplayServerOSX *>(this)->_update_keyboard_layouts();
	}
	return kbd_layouts.size();
}

void DisplayServerOSX::keyboard_set_current_layout(int p_index) {
	if (keyboard_layout_dirty) {
		const_cast<DisplayServerOSX *>(this)->_update_keyboard_layouts();
	}

	ERR_FAIL_INDEX(p_index, kbd_layouts.size());

	NSString *cur_name = [NSString stringWithUTF8String:kbd_layouts[p_index].name.utf8().get_data()];

	NSDictionary *filter_kbd = @{ (NSString *)kTISPropertyInputSourceType : (NSString *)kTISTypeKeyboardLayout };
	NSArray *list_kbd = (__bridge NSArray *)TISCreateInputSourceList((__bridge CFDictionaryRef)filter_kbd, false);
	for (NSUInteger i = 0; i < [list_kbd count]; i++) {
		NSString *name = (__bridge NSString *)TISGetInputSourceProperty((__bridge TISInputSourceRef)[list_kbd objectAtIndex:i], kTISPropertyLocalizedName);
		if ([name isEqualToString:cur_name]) {
			TISSelectInputSource((__bridge TISInputSourceRef)[list_kbd objectAtIndex:i]);
			break;
		}
	}

	NSDictionary *filter_ime = @{ (NSString *)kTISPropertyInputSourceType : (NSString *)kTISTypeKeyboardInputMode };
	NSArray *list_ime = (__bridge NSArray *)TISCreateInputSourceList((__bridge CFDictionaryRef)filter_ime, false);
	for (NSUInteger i = 0; i < [list_ime count]; i++) {
		NSString *name = (__bridge NSString *)TISGetInputSourceProperty((__bridge TISInputSourceRef)[list_ime objectAtIndex:i], kTISPropertyLocalizedName);
		if ([name isEqualToString:cur_name]) {
			TISSelectInputSource((__bridge TISInputSourceRef)[list_ime objectAtIndex:i]);
			break;
		}
	}
}

int DisplayServerOSX::keyboard_get_current_layout() const {
	if (keyboard_layout_dirty) {
		const_cast<DisplayServerOSX *>(this)->_update_keyboard_layouts();
	}

	return current_layout;
}

String DisplayServerOSX::keyboard_get_layout_language(int p_index) const {
	if (keyboard_layout_dirty) {
		const_cast<DisplayServerOSX *>(this)->_update_keyboard_layouts();
	}

	ERR_FAIL_INDEX_V(p_index, kbd_layouts.size(), "");
	return kbd_layouts[p_index].code;
}

String DisplayServerOSX::keyboard_get_layout_name(int p_index) const {
	if (keyboard_layout_dirty) {
		const_cast<DisplayServerOSX *>(this)->_update_keyboard_layouts();
	}

	ERR_FAIL_INDEX_V(p_index, kbd_layouts.size(), "");
	return kbd_layouts[p_index].name;
}

Key DisplayServerOSX::keyboard_get_keycode_from_physical(Key p_keycode) const {
	if (p_keycode == Key::PAUSE) {
		return p_keycode;
	}

	Key modifiers = p_keycode & KeyModifierMask::MODIFIER_MASK;
	Key keycode_no_mod = p_keycode & KeyModifierMask::CODE_MASK;
	unsigned int osx_keycode = KeyMappingOSX::unmap_key((Key)keycode_no_mod);
	return (Key)(KeyMappingOSX::remap_key(osx_keycode, 0) | modifiers);
}

void DisplayServerOSX::process_events() {
	_THREAD_SAFE_METHOD_

	while (true) {
		NSEvent *event = [NSApp
				nextEventMatchingMask:NSEventMaskAny
							untilDate:[NSDate distantPast]
							   inMode:NSDefaultRunLoopMode
							  dequeue:YES];

		if (event == nil) {
			break;
		}

		[NSApp sendEvent:event];
	}

	if (!drop_events) {
		_process_key_events();
		Input::get_singleton()->flush_buffered_events();
	}

	for (Map<WindowID, WindowData>::Element *E = windows.front(); E; E = E->next()) {
		WindowData &wd = E->get();
		if (wd.mpath.size() > 0) {
			update_mouse_pos(wd, [wd.window_object mouseLocationOutsideOfEventStream]);
			if (Geometry2D::is_point_in_polygon(wd.mouse_pos, wd.mpath)) {
				if ([wd.window_object ignoresMouseEvents]) {
					[wd.window_object setIgnoresMouseEvents:NO];
				}
			} else {
				if (![wd.window_object ignoresMouseEvents]) {
					[wd.window_object setIgnoresMouseEvents:YES];
				}
			}
		} else {
			if ([wd.window_object ignoresMouseEvents]) {
				[wd.window_object setIgnoresMouseEvents:NO];
			}
		}
	}
}

void DisplayServerOSX::force_process_and_drop_events() {
	_THREAD_SAFE_METHOD_

	drop_events = true;
	process_events();
	drop_events = false;
}

void DisplayServerOSX::release_rendering_thread() {
}

void DisplayServerOSX::make_rendering_thread() {
}

void DisplayServerOSX::swap_buffers() {
#if defined(GLES3_ENABLED)
	gl_manager->swap_buffers();
#endif
}

void DisplayServerOSX::set_native_icon(const String &p_filename) {
	_THREAD_SAFE_METHOD_

	FileAccess *f = FileAccess::open(p_filename, FileAccess::READ);
	ERR_FAIL_COND(!f);

	Vector<uint8_t> data;
	uint64_t len = f->get_length();
	data.resize(len);
	f->get_buffer((uint8_t *)&data.write[0], len);
	memdelete(f);

	NSData *icon_data = [[NSData alloc] initWithBytes:&data.write[0] length:len];
	ERR_FAIL_COND_MSG(!icon_data, "Error reading icon data.");

	NSImage *icon = [[NSImage alloc] initWithData:icon_data];
	ERR_FAIL_COND_MSG(!icon, "Error loading icon.");

	[NSApp setApplicationIconImage:icon];
}

void DisplayServerOSX::set_icon(const Ref<Image> &p_icon) {
	_THREAD_SAFE_METHOD_

	Ref<Image> img = p_icon;
	img = img->duplicate();
	img->convert(Image::FORMAT_RGBA8);
	NSBitmapImageRep *imgrep = [[NSBitmapImageRep alloc]
			initWithBitmapDataPlanes:nullptr
						  pixelsWide:img->get_width()
						  pixelsHigh:img->get_height()
					   bitsPerSample:8
					 samplesPerPixel:4
							hasAlpha:YES
							isPlanar:NO
					  colorSpaceName:NSDeviceRGBColorSpace
						 bytesPerRow:img->get_width() * 4
						bitsPerPixel:32];
	ERR_FAIL_COND(imgrep == nil);
	uint8_t *pixels = [imgrep bitmapData];

	int len = img->get_width() * img->get_height();
	const uint8_t *r = img->get_data().ptr();

	/* Premultiply the alpha channel */
	for (int i = 0; i < len; i++) {
		uint8_t alpha = r[i * 4 + 3];
		pixels[i * 4 + 0] = (uint8_t)(((uint16_t)r[i * 4 + 0] * alpha) / 255);
		pixels[i * 4 + 1] = (uint8_t)(((uint16_t)r[i * 4 + 1] * alpha) / 255);
		pixels[i * 4 + 2] = (uint8_t)(((uint16_t)r[i * 4 + 2] * alpha) / 255);
		pixels[i * 4 + 3] = alpha;
	}

	NSImage *nsimg = [[NSImage alloc] initWithSize:NSMakeSize(img->get_width(), img->get_height())];
	ERR_FAIL_COND(nsimg == nil);

	[nsimg addRepresentation:imgrep];
	[NSApp setApplicationIconImage:nsimg];
}

DisplayServer *DisplayServerOSX::create_func(const String &p_rendering_driver, WindowMode p_mode, VSyncMode p_vsync_mode, uint32_t p_flags, const Vector2i &p_resolution, Error &r_error) {
	DisplayServer *ds = memnew(DisplayServerOSX(p_rendering_driver, p_mode, p_vsync_mode, p_flags, p_resolution, r_error));
	if (r_error != OK) {
		OS::get_singleton()->alert("Your video card driver does not support any of the supported Vulkan or OpenGL versions.", "Unable to initialize Video driver");
	}
	return ds;
}

Vector<String> DisplayServerOSX::get_rendering_drivers_func() {
	Vector<String> drivers;

#if defined(VULKAN_ENABLED)
	drivers.push_back("vulkan");
#endif
#if defined(GLES3_ENABLED)
	drivers.push_back("opengl3");
#endif

	return drivers;
}

void DisplayServerOSX::register_osx_driver() {
	register_create_function("osx", create_func, get_rendering_drivers_func);
}

DisplayServer::WindowID DisplayServerOSX::window_get_active_popup() const {
	const List<WindowID>::Element *E = popup_list.back();
	if (E) {
		return E->get();
	} else {
		return INVALID_WINDOW_ID;
	}
}

void DisplayServerOSX::window_set_popup_safe_rect(WindowID p_window, const Rect2i &p_rect) {
	_THREAD_SAFE_METHOD_

	ERR_FAIL_COND(!windows.has(p_window));
	WindowData &wd = windows[p_window];
	wd.parent_safe_rect = p_rect;
}

Rect2i DisplayServerOSX::window_get_popup_safe_rect(WindowID p_window) const {
	_THREAD_SAFE_METHOD_

	ERR_FAIL_COND_V(!windows.has(p_window), Rect2i());
	const WindowData &wd = windows[p_window];
	return wd.parent_safe_rect;
}

void DisplayServerOSX::popup_open(WindowID p_window) {
	WindowData &wd = windows[p_window];
	if (wd.is_popup) {
		bool was_empty = popup_list.is_empty();
		// Close all popups, up to current popup parent, or every popup if new window is not transient.
		List<WindowID>::Element *E = popup_list.back();
		while (E) {
			if (wd.transient_parent != E->get() || wd.transient_parent == INVALID_WINDOW_ID) {
				send_window_event(windows[E->get()], DisplayServerOSX::WINDOW_EVENT_CLOSE_REQUEST);
				List<WindowID>::Element *F = E->prev();
				popup_list.erase(E);
				E = F;
			} else {
				break;
			}
		}

		if (was_empty && popup_list.is_empty()) {
			// Inform OS that popup was opened, to close other native popups.
			[[NSDistributedNotificationCenter defaultCenter] postNotificationName:@"com.apple.HIToolbox.beginMenuTrackingNotification" object:@"org.godotengine.godot.popup_window"];
		}
		time_since_popup = OS::get_singleton()->get_ticks_msec();
		popup_list.push_back(p_window);
	}
}

void DisplayServerOSX::popup_close(WindowID p_window) {
	bool was_empty = popup_list.is_empty();
	List<WindowID>::Element *E = popup_list.find(p_window);
	while (E) {
		send_window_event(windows[E->get()], DisplayServerOSX::WINDOW_EVENT_CLOSE_REQUEST);
		List<WindowID>::Element *F = E->next();
		popup_list.erase(E);
		E = F;
	}
	if (!was_empty && popup_list.is_empty()) {
		// Inform OS that all popups are closed.
		[[NSDistributedNotificationCenter defaultCenter] postNotificationName:@"com.apple.HIToolbox.endMenuTrackingNotification" object:@"org.godotengine.godot.popup_window"];
	}
}

void DisplayServerOSX::mouse_process_popups(bool p_close) {
	_THREAD_SAFE_METHOD_

	bool was_empty = popup_list.is_empty();
	if (p_close) {
		// Close all popups.
		List<WindowID>::Element *E = popup_list.front();
		while (E) {
			send_window_event(windows[E->get()], DisplayServerOSX::WINDOW_EVENT_CLOSE_REQUEST);
			List<WindowID>::Element *F = E->next();
			popup_list.erase(E);
			E = F;
		}
		if (!was_empty) {
			// Inform OS that all popups are closed.
			[[NSDistributedNotificationCenter defaultCenter] postNotificationName:@"com.apple.HIToolbox.endMenuTrackingNotification" object:@"org.godotengine.godot.popup_window"];
		}
	} else {
		uint64_t delta = OS::get_singleton()->get_ticks_msec() - time_since_popup;
		if (delta < 250) {
			return;
		}

		Point2i pos = mouse_get_position();
		List<WindowID>::Element *E = popup_list.back();
		while (E) {
			// Popup window area.
			Rect2i win_rect = Rect2i(window_get_position(E->get()), window_get_size(E->get()));
			// Area of the parent window, which responsible for opening sub-menu.
			Rect2i safe_rect = window_get_popup_safe_rect(E->get());
			if (win_rect.has_point(pos)) {
				break;
			} else if (safe_rect != Rect2i() && safe_rect.has_point(pos)) {
				break;
			} else {
				send_window_event(windows[E->get()], DisplayServerOSX::WINDOW_EVENT_CLOSE_REQUEST);
				List<WindowID>::Element *F = E->prev();
				popup_list.erase(E);
				E = F;
			}
		}
		if (!was_empty && popup_list.is_empty()) {
			// Inform OS that all popups are closed.
			[[NSDistributedNotificationCenter defaultCenter] postNotificationName:@"com.apple.HIToolbox.endMenuTrackingNotification" object:@"org.godotengine.godot.popup_window"];
		}
	}
}

DisplayServerOSX::DisplayServerOSX(const String &p_rendering_driver, WindowMode p_mode, VSyncMode p_vsync_mode, uint32_t p_flags, const Vector2i &p_resolution, Error &r_error) {
	Input::get_singleton()->set_event_dispatch_function(_dispatch_input_events);

	r_error = OK;

	memset(cursors, 0, sizeof(cursors));

	event_source = CGEventSourceCreate(kCGEventSourceStateHIDSystemState);
	ERR_FAIL_COND(!event_source);

	CGEventSourceSetLocalEventsSuppressionInterval(event_source, 0.0);

	int screen_count = get_screen_count();
	for (int i = 0; i < screen_count; i++) {
		display_max_scale = fmax(display_max_scale, screen_get_scale(i));
	}

	// Register to be notified on keyboard layout changes.
	CFNotificationCenterAddObserver(CFNotificationCenterGetDistributedCenter(),
			nullptr, _keyboard_layout_changed,
			kTISNotifySelectedKeyboardInputSourceChanged, nullptr,
			CFNotificationSuspensionBehaviorDeliverImmediately);

	// Register to be notified on displays arrangement changes.
	CGDisplayRegisterReconfigurationCallback(_displays_arrangement_changed, nullptr);

	NSMenuItem *menu_item;
	NSString *title;

	NSString *nsappname = [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleName"];
	if (nsappname == nil) {
		nsappname = [[NSProcessInfo processInfo] processName];
	}

	// Setup Dock menu.
	dock_menu = [[NSMenu alloc] initWithTitle:@"_dock"];

	// Setup Apple menu.
	apple_menu = [[NSMenu alloc] initWithTitle:@""];
	title = [NSString stringWithFormat:NSLocalizedString(@"About %@", nil), nsappname];
	[apple_menu addItemWithTitle:title action:@selector(showAbout:) keyEquivalent:@""];

	[apple_menu addItem:[NSMenuItem separatorItem]];

	NSMenu *services = [[NSMenu alloc] initWithTitle:@""];
	menu_item = [apple_menu addItemWithTitle:NSLocalizedString(@"Services", nil) action:nil keyEquivalent:@""];
	[apple_menu setSubmenu:services forItem:menu_item];
	[NSApp setServicesMenu:services];

	[apple_menu addItem:[NSMenuItem separatorItem]];

	title = [NSString stringWithFormat:NSLocalizedString(@"Hide %@", nil), nsappname];
	[apple_menu addItemWithTitle:title action:@selector(hide:) keyEquivalent:@"h"];

	menu_item = [apple_menu addItemWithTitle:NSLocalizedString(@"Hide Others", nil) action:@selector(hideOtherApplications:) keyEquivalent:@"h"];
	[menu_item setKeyEquivalentModifierMask:(NSEventModifierFlagOption | NSEventModifierFlagCommand)];

	[apple_menu addItemWithTitle:NSLocalizedString(@"Show all", nil) action:@selector(unhideAllApplications:) keyEquivalent:@""];

	[apple_menu addItem:[NSMenuItem separatorItem]];

	title = [NSString stringWithFormat:NSLocalizedString(@"Quit %@", nil), nsappname];
	[apple_menu addItemWithTitle:title action:@selector(terminate:) keyEquivalent:@"q"];

	// Add items to the menu bar.
	NSMenu *main_menu = [NSApp mainMenu];
	menu_item = [main_menu addItemWithTitle:@"" action:nil keyEquivalent:@""];
	[main_menu setSubmenu:apple_menu forItem:menu_item];

	//!!!!!!!!!!!!!!!!!!!!!!!!!!
	//TODO - do Vulkan and OpenGL support checks, driver selection and fallback
	rendering_driver = p_rendering_driver;

#if defined(GLES3_ENABLED)
	if (rendering_driver == "opengl3") {
		GLManager_OSX::ContextType opengl_api_type = GLManager_OSX::GLES_3_0_COMPATIBLE;
		gl_manager = memnew(GLManager_OSX(opengl_api_type));
		if (gl_manager->initialize() != OK) {
			memdelete(gl_manager);
			gl_manager = nullptr;
			r_error = ERR_UNAVAILABLE;
			ERR_FAIL_MSG("Could not initialize OpenGL");
			return;
		}
	}
#endif
#if defined(VULKAN_ENABLED)
	if (rendering_driver == "vulkan") {
		context_vulkan = memnew(VulkanContextOSX);
		if (context_vulkan->initialize() != OK) {
			memdelete(context_vulkan);
			context_vulkan = nullptr;
			r_error = ERR_CANT_CREATE;
			ERR_FAIL_MSG("Could not initialize Vulkan");
		}
	}
#endif

	Point2i window_position(
			screen_get_position(0).x + (screen_get_size(0).width - p_resolution.width) / 2,
			screen_get_position(0).y + (screen_get_size(0).height - p_resolution.height) / 2);
	WindowID main_window = _create_window(p_mode, p_vsync_mode, Rect2i(window_position, p_resolution));
	ERR_FAIL_COND(main_window == INVALID_WINDOW_ID);
	for (int i = 0; i < WINDOW_FLAG_MAX; i++) {
		if (p_flags & (1 << i)) {
			window_set_flag(WindowFlags(i), true, main_window);
		}
	}
	show_window(MAIN_WINDOW_ID);

#if defined(GLES3_ENABLED)
	if (rendering_driver == "opengl3") {
		RasterizerGLES3::make_current();
	}
#endif
#if defined(VULKAN_ENABLED)
	if (rendering_driver == "vulkan") {
		rendering_device_vulkan = memnew(RenderingDeviceVulkan);
		rendering_device_vulkan->initialize(context_vulkan);

		RendererCompositorRD::make_current();
	}
#endif
}

DisplayServerOSX::~DisplayServerOSX() {
	// Destroy all windows.
	for (Map<WindowID, WindowData>::Element *E = windows.front(); E;) {
		Map<WindowID, WindowData>::Element *F = E;
		E = E->next();
		[F->get().window_object setContentView:nil];
		[F->get().window_object close];
	}

	// Destroy drivers.
#if defined(GLES3_ENABLED)
	if (gl_manager) {
		memdelete(gl_manager);
		gl_manager = nullptr;
	}
#endif
#if defined(VULKAN_ENABLED)
	if (rendering_device_vulkan) {
		rendering_device_vulkan->finalize();
		memdelete(rendering_device_vulkan);
		rendering_device_vulkan = nullptr;
	}

	if (context_vulkan) {
		memdelete(context_vulkan);
		context_vulkan = nullptr;
	}
#endif

	CFNotificationCenterRemoveObserver(CFNotificationCenterGetDistributedCenter(), nullptr, kTISNotifySelectedKeyboardInputSourceChanged, nullptr);
	CGDisplayRemoveReconfigurationCallback(_displays_arrangement_changed, nullptr);

	cursors_cache.clear();
}