initial commit, 4.5 stable

platform/macos/embedded_gl_manager.h

@@ -0,0 +1,124 @@
+/**************************************************************************/
+/*  embedded_gl_manager.h                                                 */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 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.                 */
+/**************************************************************************/
+
+#pragma once
+
+#if defined(MACOS_ENABLED) && defined(GLES3_ENABLED)
+
+#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>
+
+GODOT_CLANG_WARNING_PUSH_AND_IGNORE("-Wdeprecated-declarations") // OpenGL is deprecated in macOS 10.14.
+
+typedef CGLContextObj (*CGLGetCurrentContextPtr)(void);
+typedef CGLError (*CGLTexImageIOSurface2DPtr)(CGLContextObj ctx, GLenum target, GLenum internal_format,
+		GLsizei width, GLsizei height, GLenum format, GLenum type, IOSurfaceRef ioSurface, GLuint plane);
+typedef const char *(*CGLErrorStringPtr)(CGLError);
+
+class GLManagerEmbedded {
+	/// @brief The number of framebuffers to create for each window.
+	///
+	/// Triple-buffering is used to avoid stuttering.
+	static constexpr uint32_t BUFFER_COUNT = 3;
+
+	// The display ID for which vsync is used. If this value is -1, vsync is disabled.
+	constexpr static uint32_t INVALID_DISPLAY_ID = static_cast<uint32_t>(-1);
+
+	struct FrameBuffer {
+		IOSurfaceRef surface = nullptr;
+		unsigned int tex = 0;
+		unsigned int fbo = 0;
+	};
+
+	struct GLWindow {
+		uint32_t width = 0;
+		uint32_t height = 0;
+		CALayer *layer = nullptr;
+		NSOpenGLContext *context = nullptr;
+		FrameBuffer framebuffers[BUFFER_COUNT];
+		uint32_t current_fb = 0;
+		bool is_valid = false;
+
+		void destroy_framebuffers();
+
+		~GLWindow() { destroy_framebuffers(); }
+	};
+
+	RBMap<DisplayServer::WindowID, GLWindow> windows;
+	typedef RBMap<DisplayServer::WindowID, GLWindow>::Element GLWindowElement;
+
+	NSOpenGLContext *shared_context = nullptr;
+	DisplayServer::WindowID current_window = DisplayServer::INVALID_WINDOW_ID;
+
+	Error create_context(GLWindow &p_win);
+
+	bool framework_loaded = false;
+	CGLGetCurrentContextPtr CGLGetCurrentContext = nullptr;
+	CGLTexImageIOSurface2DPtr CGLTexImageIOSurface2D = nullptr;
+	CGLErrorStringPtr CGLErrorString = nullptr;
+
+	uint32_t display_id = INVALID_DISPLAY_ID;
+	CVDisplayLinkRef display_link = nullptr;
+	bool vsync_enabled = false;
+	bool display_link_running = false;
+	dispatch_semaphore_t display_semaphore = nullptr;
+
+	void create_display_link();
+	void release_display_link();
+
+public:
+	Error window_create(DisplayServer::WindowID p_window_id, CALayer *p_layer, 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);
+	Size2i window_get_size(DisplayServer::WindowID p_window_id) const;
+
+	void set_display_id(uint32_t p_display_id);
+	void set_vsync_enabled(bool p_enabled);
+	bool is_vsync_enabled() const { return vsync_enabled; }
+
+	void release_current();
+	void swap_buffers();
+
+	void window_make_current(DisplayServer::WindowID p_window_id);
+
+	Error initialize();
+
+	GLManagerEmbedded();
+	~GLManagerEmbedded();
+};
+
+GODOT_CLANG_WARNING_PUSH
+
+#endif // MACOS_ENABLED && GLES3_ENABLED