pandemonium_engine/platform/windows/context_gl_windows.h

#ifndef CONTEXT_GL_WIN_H
#define CONTEXT_GL_WIN_H

/*************************************************************************/
/*  context_gl_windows.h                                                 */
/*************************************************************************/
/*                         This file is part of:                         */
/*                          PANDEMONIUM ENGINE                           */
/*             https://github.com/Relintai/pandemonium_engine            */
/*************************************************************************/
/* Copyright (c) 2022-present Péter Magyar.                              */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
/*                                                                       */
/* 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.                */
/*************************************************************************/

#if defined(OPENGL_ENABLED) || defined(GLES_ENABLED)

// Author: Juan Linietsky <reduzio@gmail.com>, (C) 2008

#include "core/error/error_list.h"
#include "core/os/os.h"

#define WIN32_LEAN_AND_MEAN
#include <windows.h>

typedef bool(APIENTRY *PFNWGLSWAPINTERVALEXTPROC)(int interval);
typedef int(APIENTRY *PFNWGLGETSWAPINTERVALEXTPROC)(void);

class ContextGL_Windows {
	HDC hDC;
	HGLRC hRC;
	HGLRC hRC_offscreen;
	unsigned int pixel_format;
	HWND hWnd;
	bool opengl_3_context;
	bool use_vsync;
	bool vsync_via_compositor;

	PFNWGLSWAPINTERVALEXTPROC wglSwapIntervalEXT;
	PFNWGLGETSWAPINTERVALEXTPROC wglGetSwapIntervalEXT;

	static bool should_vsync_via_compositor();

public:
	void release_current();

	void make_current();

	bool is_offscreen_available() const;
	void make_offscreen_current();
	void release_offscreen_current();

	HDC get_hdc();
	HGLRC get_hglrc();

	int get_window_width();
	int get_window_height();
	void swap_buffers();

	Error initialize();

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

	ContextGL_Windows(HWND hwnd, bool p_opengl_3_context);
	~ContextGL_Windows();
};

#endif
#endif