[X11] Add support for using EGL/GLES instead of GLX.

editor/editor_node.cpp

@@ -4473,7 +4473,7 @@ String EditorNode::_get_system_info() const {
 	}
 	if (driver_name == "vulkan") {
 		driver_name = "Vulkan";
-	} else if (driver_name == "opengl3") {
+	} else if (driver_name.begins_with("opengl3")) {
 		driver_name = "GLES3";
 	}
 

main/main.cpp

@@ -1746,9 +1746,11 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 	{
 		String driver_hints = "";
 		String driver_hints_angle = "";
+		String driver_hints_egl = "";
 #ifdef GLES3_ENABLED
 		driver_hints = "opengl3";
 		driver_hints_angle = "opengl3,opengl3_angle";
+		driver_hints_egl = "opengl3,opengl3_es";
 #endif
 
 		String default_driver = driver_hints.get_slice(",", 0);
@@ -1759,11 +1761,12 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 
 		GLOBAL_DEF_RST("rendering/gl_compatibility/driver", default_driver);
 		GLOBAL_DEF_RST(PropertyInfo(Variant::STRING, "rendering/gl_compatibility/driver.windows", PROPERTY_HINT_ENUM, driver_hints_angle), default_driver);
-		GLOBAL_DEF_RST(PropertyInfo(Variant::STRING, "rendering/gl_compatibility/driver.linuxbsd", PROPERTY_HINT_ENUM, driver_hints), default_driver);
+		GLOBAL_DEF_RST(PropertyInfo(Variant::STRING, "rendering/gl_compatibility/driver.linuxbsd", PROPERTY_HINT_ENUM, driver_hints_egl), default_driver);
 		GLOBAL_DEF_RST(PropertyInfo(Variant::STRING, "rendering/gl_compatibility/driver.web", PROPERTY_HINT_ENUM, driver_hints), default_driver);
 		GLOBAL_DEF_RST(PropertyInfo(Variant::STRING, "rendering/gl_compatibility/driver.android", PROPERTY_HINT_ENUM, driver_hints), default_driver);
 		GLOBAL_DEF_RST(PropertyInfo(Variant::STRING, "rendering/gl_compatibility/driver.ios", PROPERTY_HINT_ENUM, driver_hints), default_driver);
 		GLOBAL_DEF_RST(PropertyInfo(Variant::STRING, "rendering/gl_compatibility/driver.macos", PROPERTY_HINT_ENUM, driver_hints_angle), default_driver_macos);
+
 		GLOBAL_DEF_RST("rendering/gl_compatibility/nvidia_disable_threaded_optimization", true);
 		GLOBAL_DEF_RST("rendering/gl_compatibility/fallback_to_angle", true);
 
@@ -1841,7 +1844,7 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 
 		// Set a default renderer if none selected. Try to choose one that matches the driver.
 		if (rendering_method.is_empty()) {
-			if (rendering_driver == "opengl3" || rendering_driver == "opengl3_angle") {
+			if (rendering_driver == "opengl3" || rendering_driver == "opengl3_angle" || rendering_driver == "opengl3_es") {
 				rendering_method = "gl_compatibility";
 			} else {
 				rendering_method = "forward_plus";
@@ -1860,6 +1863,7 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 		if (rendering_method == "gl_compatibility") {
 			available_drivers.push_back("opengl3");
 			available_drivers.push_back("opengl3_angle");
+			available_drivers.push_back("opengl3_es");
 		}
 #endif
 		if (available_drivers.is_empty()) {

platform/linuxbsd/platform_gl.h

@@ -35,6 +35,10 @@
 #define GL_API_ENABLED // Allow using desktop GL.
 #endif
 
+#ifndef GLES_API_ENABLED
+#define GLES_API_ENABLED // Allow using GLES.
+#endif
+
 #include "thirdparty/glad/glad/egl.h"
 #include "thirdparty/glad/glad/gl.h"
 

platform/linuxbsd/x11/SCsub

@@ -25,7 +25,9 @@ if env["vulkan"]:
 
 if env["opengl3"]:
     env.Append(CPPDEFINES=["GLAD_GLX_NO_X11"])
-    source_files.append(["gl_manager_x11.cpp", "detect_prime_x11.cpp", "#thirdparty/glad/glx.c"])
+    source_files.append(
+        ["gl_manager_x11_egl.cpp", "gl_manager_x11.cpp", "detect_prime_x11.cpp", "#thirdparty/glad/glx.c"]
+    )
 
 objects = []
 

platform/linuxbsd/x11/display_server_x11.cpp

@@ -1495,6 +1495,9 @@ void DisplayServerX11::delete_sub_window(WindowID p_id) {
 	if (gl_manager) {
 		gl_manager->window_destroy(p_id);
 	}
+	if (gl_manager_egl) {
+		gl_manager_egl->window_destroy(p_id);
+	}
 #endif
 
 	if (wd.xic) {
@@ -1534,6 +1537,9 @@ int64_t DisplayServerX11::window_get_native_handle(HandleType p_handle_type, Win
 			if (gl_manager) {
 				return (int64_t)gl_manager->get_glx_context(p_window);
 			}
+			if (gl_manager_egl) {
+				return (int64_t)gl_manager_egl->get_context(p_window);
+			}
 			return 0;
 		}
 #endif
@@ -1711,6 +1717,9 @@ void DisplayServerX11::gl_window_make_current(DisplayServer::WindowID p_window_i
 	if (gl_manager) {
 		gl_manager->window_make_current(p_window_id);
 	}
+	if (gl_manager_egl) {
+		gl_manager_egl->window_make_current(p_window_id);
+	}
 #endif
 }
 
@@ -2012,6 +2021,9 @@ void DisplayServerX11::window_set_size(const Size2i p_size, WindowID p_window) {
 	if (gl_manager) {
 		gl_manager->window_resize(p_window, xwa.width, xwa.height);
 	}
+	if (gl_manager_egl) {
+		gl_manager_egl->window_resize(p_window, xwa.width, xwa.height);
+	}
 #endif
 }
 
@@ -3721,6 +3733,9 @@ void DisplayServerX11::_window_changed(XEvent *event) {
 	if (gl_manager) {
 		gl_manager->window_resize(window_id, wd.size.width, wd.size.height);
 	}
+	if (gl_manager_egl) {
+		gl_manager_egl->window_resize(window_id, wd.size.width, wd.size.height);
+	}
 #endif
 
 	if (!wd.rect_changed_callback.is_null()) {
@@ -4855,6 +4870,9 @@ void DisplayServerX11::release_rendering_thread() {
 	if (gl_manager) {
 		gl_manager->release_current();
 	}
+	if (gl_manager_egl) {
+		gl_manager_egl->release_current();
+	}
 #endif
 }
 
@@ -4863,6 +4881,9 @@ void DisplayServerX11::make_rendering_thread() {
 	if (gl_manager) {
 		gl_manager->make_current();
 	}
+	if (gl_manager_egl) {
+		gl_manager_egl->make_current();
+	}
 #endif
 }
 
@@ -4871,6 +4892,9 @@ void DisplayServerX11::swap_buffers() {
 	if (gl_manager) {
 		gl_manager->swap_buffers();
 	}
+	if (gl_manager_egl) {
+		gl_manager_egl->swap_buffers();
+	}
 #endif
 }
 
@@ -5024,6 +5048,9 @@ void DisplayServerX11::window_set_vsync_mode(DisplayServer::VSyncMode p_vsync_mo
 	if (gl_manager) {
 		gl_manager->set_use_vsync(p_vsync_mode != DisplayServer::VSYNC_DISABLED);
 	}
+	if (gl_manager_egl) {
+		gl_manager_egl->set_use_vsync(p_vsync_mode != DisplayServer::VSYNC_DISABLED);
+	}
 #endif
 }
 
@@ -5038,6 +5065,9 @@ DisplayServer::VSyncMode DisplayServerX11::window_get_vsync_mode(WindowID p_wind
 	if (gl_manager) {
 		return gl_manager->is_using_vsync() ? DisplayServer::VSYNC_ENABLED : DisplayServer::VSYNC_DISABLED;
 	}
+	if (gl_manager_egl) {
+		return gl_manager_egl->is_using_vsync() ? DisplayServer::VSYNC_ENABLED : DisplayServer::VSYNC_DISABLED;
+	}
 #endif
 	return DisplayServer::VSYNC_ENABLED;
 }
@@ -5050,6 +5080,7 @@ Vector<String> DisplayServerX11::get_rendering_drivers_func() {
 #endif
 #ifdef GLES3_ENABLED
 	drivers.push_back("opengl3");
+	drivers.push_back("opengl3_es");
 #endif
 
 	return drivers;
@@ -5092,6 +5123,21 @@ DisplayServerX11::WindowID DisplayServerX11::_create_window(WindowMode p_mode, V
 		ERR_FAIL_COND_V_MSG(err != OK, INVALID_WINDOW_ID, "Can't acquire visual info from display.");
 		vi_selected = true;
 	}
+	if (gl_manager_egl) {
+		XVisualInfo visual_info_template;
+		int visual_id = gl_manager_egl->display_get_native_visual_id(x11_display);
+		ERR_FAIL_COND_V_MSG(visual_id < 0, INVALID_WINDOW_ID, "Unable to get a visual id.");
+
+		visual_info_template.visualid = (VisualID)visual_id;
+
+		int number_of_visuals = 0;
+		XVisualInfo *vi_list = XGetVisualInfo(x11_display, VisualIDMask, &visual_info_template, &number_of_visuals);
+		ERR_FAIL_COND_V(number_of_visuals <= 0, INVALID_WINDOW_ID);
+
+		visualInfo = vi_list[0];
+
+		XFree(vi_list);
+	}
 #endif
 
 	if (!vi_selected) {
@@ -5364,8 +5410,12 @@ DisplayServerX11::WindowID DisplayServerX11::_create_window(WindowMode p_mode, V
 		if (gl_manager) {
 			Error err = gl_manager->window_create(id, wd.x11_window, x11_display, win_rect.size.width, win_rect.size.height);
 			ERR_FAIL_COND_V_MSG(err != OK, INVALID_WINDOW_ID, "Can't create an OpenGL window");
-			window_set_vsync_mode(p_vsync_mode, id);
 		}
+		if (gl_manager_egl) {
+			Error err = gl_manager_egl->window_create(id, x11_display, &wd.x11_window, win_rect.size.width, win_rect.size.height);
+			ERR_FAIL_COND_V_MSG(err != OK, INVALID_WINDOW_ID, "Failed to create an OpenGLES window.");
+		}
+		window_set_vsync_mode(p_vsync_mode, id);
 #endif
 
 		//set_class_hint(x11_display, wd.x11_window);
@@ -5766,7 +5816,7 @@ DisplayServerX11::DisplayServerX11(const String &p_rendering_driver, WindowMode
 #endif
 	// Initialize context and rendering device.
 #if defined(GLES3_ENABLED)
-	if (rendering_driver == "opengl3") {
+	if (rendering_driver == "opengl3" || rendering_driver == "opengl3_es") {
 		if (getenv("DRI_PRIME") == nullptr) {
 			int use_prime = -1;
 
@@ -5807,7 +5857,8 @@ DisplayServerX11::DisplayServerX11(const String &p_rendering_driver, WindowMode
 				setenv("DRI_PRIME", "1", 1);
 			}
 		}
-
+	}
+	if (rendering_driver == "opengl3") {
 		GLManager_X11::ContextType opengl_api_type = GLManager_X11::GLES_3_0_COMPATIBLE;
 
 		gl_manager = memnew(GLManager_X11(p_resolution, opengl_api_type));
@@ -5820,14 +5871,20 @@ DisplayServerX11::DisplayServerX11(const String &p_rendering_driver, WindowMode
 		}
 		driver_found = true;
 
-		if (true) {
-			RasterizerGLES3::make_current(true);
-		} else {
-			memdelete(gl_manager);
-			gl_manager = nullptr;
+		RasterizerGLES3::make_current(true);
+	}
+	if (rendering_driver == "opengl3_es") {
+		gl_manager_egl = memnew(GLManagerEGL_X11);
+
+		if (gl_manager_egl->initialize() != OK) {
+			memdelete(gl_manager_egl);
+			gl_manager_egl = nullptr;
 			r_error = ERR_UNAVAILABLE;
 			return;
 		}
+		driver_found = true;
+
+		RasterizerGLES3::make_current(false);
 	}
 #endif
 	if (!driver_found) {
@@ -6044,6 +6101,9 @@ DisplayServerX11::~DisplayServerX11() {
 		if (gl_manager) {
 			gl_manager->window_destroy(E.key);
 		}
+		if (gl_manager_egl) {
+			gl_manager_egl->window_destroy(E.key);
+		}
 #endif
 
 		WindowData &wd = E.value;
@@ -6094,6 +6154,10 @@ DisplayServerX11::~DisplayServerX11() {
 		memdelete(gl_manager);
 		gl_manager = nullptr;
 	}
+	if (gl_manager_egl) {
+		memdelete(gl_manager_egl);
+		gl_manager_egl = nullptr;
+	}
 #endif
 
 	if (xrandr_handle) {

platform/linuxbsd/x11/display_server_x11.h

@@ -54,6 +54,7 @@
 
 #if defined(GLES3_ENABLED)
 #include "x11/gl_manager_x11.h"
+#include "x11/gl_manager_x11_egl.h"
 #endif
 
 #if defined(VULKAN_ENABLED)
@@ -138,6 +139,7 @@ class DisplayServerX11 : public DisplayServer {
 
 #if defined(GLES3_ENABLED)
 	GLManager_X11 *gl_manager = nullptr;
+	GLManagerEGL_X11 *gl_manager_egl = nullptr;
 #endif
 #if defined(VULKAN_ENABLED)
 	VulkanContextX11 *context_vulkan = nullptr;

platform/linuxbsd/x11/gl_manager_x11_egl.cpp

@@ -0,0 +1,63 @@
+/**************************************************************************/
+/*  gl_manager_x11_egl.cpp                                                */
+/**************************************************************************/
+/*                         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.                 */
+/**************************************************************************/
+
+#include "gl_manager_x11_egl.h"
+
+#if defined(X11_ENABLED) && defined(GLES3_ENABLED)
+
+#include <stdio.h>
+#include <stdlib.h>
+
+const char *GLManagerEGL_X11::_get_platform_extension_name() const {
+	return "EGL_KHR_platform_x11";
+}
+
+EGLenum GLManagerEGL_X11::_get_platform_extension_enum() const {
+	return EGL_PLATFORM_X11_KHR;
+}
+
+Vector<EGLAttrib> GLManagerEGL_X11::_get_platform_display_attributes() const {
+	return Vector<EGLAttrib>();
+}
+
+EGLenum GLManagerEGL_X11::_get_platform_api_enum() const {
+	return EGL_OPENGL_ES_API;
+}
+
+Vector<EGLint> GLManagerEGL_X11::_get_platform_context_attribs() const {
+	Vector<EGLint> ret;
+	ret.push_back(EGL_CONTEXT_CLIENT_VERSION);
+	ret.push_back(3);
+	ret.push_back(EGL_NONE);
+
+	return ret;
+}
+
+#endif // WINDOWS_ENABLED && GLES3_ENABLED