/**************************************************************************/
/*  gl_manager_macos_legacy.h                                             */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             GODOT ENGINE                               */
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/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
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/**************************************************************************/

#ifndef GL_MANAGER_MACOS_LEGACY_H
#define GL_MANAGER_MACOS_LEGACY_H

#if defined(MACOS_ENABLED) && defined(GLES3_ENABLED)

#include "core/error/error_list.h"
#include "core/os/os.h"
#include "core/templates/local_vector.h"
#include "servers/display_server.h"

#import <AppKit/AppKit.h>
#import <ApplicationServices/ApplicationServices.h>
#import <CoreVideo/CoreVideo.h>

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations" // OpenGL is deprecated in macOS 10.14

typedef CGLError (*CGLEnablePtr)(CGLContextObj ctx, CGLContextEnable pname);
typedef CGLError (*CGLSetParameterPtr)(CGLContextObj ctx, CGLContextParameter pname, const GLint *params);
typedef CGLContextObj (*CGLGetCurrentContextPtr)(void);

class GLManagerLegacy_MacOS {
	struct GLWindow {
		id window_view = nullptr;
		NSOpenGLContext *context = nullptr;
	};

	RBMap<DisplayServer::WindowID, GLWindow> windows;

	NSOpenGLContext *shared_context = nullptr;
	DisplayServer::WindowID current_window = DisplayServer::INVALID_WINDOW_ID;

	Error create_context(GLWindow &win);

	bool use_vsync = false;
	CGLEnablePtr CGLEnable = nullptr;
	CGLSetParameterPtr CGLSetParameter = nullptr;
	CGLGetCurrentContextPtr CGLGetCurrentContext = nullptr;

public:
	Error window_create(DisplayServer::WindowID p_window_id, id p_view, int p_width, int p_height);
	void window_destroy(DisplayServer::WindowID p_window_id);
	void window_resize(DisplayServer::WindowID p_window_id, int p_width, int p_height);

	void release_current();
	void swap_buffers();

	void window_make_current(DisplayServer::WindowID p_window_id);

	void window_set_per_pixel_transparency_enabled(DisplayServer::WindowID p_window_id, bool p_enabled);

	Error initialize();

	void set_use_vsync(bool p_use);
	bool is_using_vsync() const;

	NSOpenGLContext *get_context(DisplayServer::WindowID p_window_id);

	GLManagerLegacy_MacOS();
	~GLManagerLegacy_MacOS();
};

#pragma clang diagnostic push

#endif // MACOS_ENABLED && GLES3_ENABLED

#endif // GL_MANAGER_MACOS_LEGACY_H