add support for EGL 1.4

drivers/egl/egl_manager.cpp

@@ -52,9 +52,13 @@ int EGLManager::_get_gldisplay_id(void *p_display) {
 	GLDisplay new_gldisplay;
 	new_gldisplay.display = p_display;
 
-	Vector<EGLAttrib> attribs = _get_platform_display_attributes();
-
-	new_gldisplay.egl_display = eglGetPlatformDisplay(_get_platform_extension_enum(), new_gldisplay.display, (attribs.size() > 0) ? attribs.ptr() : nullptr);
+	if (GLAD_EGL_VERSION_1_5) {
+		Vector<EGLAttrib> attribs = _get_platform_display_attributes();
+		new_gldisplay.egl_display = eglGetPlatformDisplay(_get_platform_extension_enum(), new_gldisplay.display, (attribs.size() > 0) ? attribs.ptr() : nullptr);
+	} else {
+		NativeDisplayType *native_display_type = (NativeDisplayType *)new_gldisplay.display;
+		new_gldisplay.egl_display = eglGetDisplay(*native_display_type);
+	}
 	ERR_FAIL_COND_V(eglGetError() != EGL_SUCCESS, -1);
 
 	ERR_FAIL_COND_V_MSG(new_gldisplay.egl_display == EGL_NO_DISPLAY, -1, "Can't create an EGL display.");
@@ -198,7 +202,12 @@ Error EGLManager::window_create(DisplayServer::WindowID p_window_id, void *p_dis
 	GLWindow &glwindow = windows[p_window_id];
 	glwindow.gldisplay_id = gldisplay_id;
 
-	glwindow.egl_surface = eglCreatePlatformWindowSurface(gldisplay.egl_display, gldisplay.egl_config, p_native_window, nullptr);
+	if (GLAD_EGL_VERSION_1_5) {
+		glwindow.egl_surface = eglCreatePlatformWindowSurface(gldisplay.egl_display, gldisplay.egl_config, p_native_window, nullptr);
+	} else {
+		EGLNativeWindowType *native_window_type = (EGLNativeWindowType *)p_native_window;
+		glwindow.egl_surface = eglCreateWindowSurface(gldisplay.egl_display, gldisplay.egl_config, *native_window_type, nullptr);
+	}
 
 	if (glwindow.egl_surface == EGL_NO_SURFACE) {
 		return ERR_CANT_CREATE;
@@ -345,7 +354,7 @@ Error EGLManager::initialize() {
 	ERR_FAIL_COND_V_MSG(!version, ERR_UNAVAILABLE, "Can't load EGL.");
 	print_verbose(vformat("Loaded EGL %d.%d", GLAD_VERSION_MAJOR(version), GLAD_VERSION_MINOR(version)));
 
-	ERR_FAIL_COND_V_MSG(!GLAD_EGL_VERSION_1_5, ERR_UNAVAILABLE, "EGL version is too old!");
+	ERR_FAIL_COND_V_MSG(!GLAD_EGL_VERSION_1_4, ERR_UNAVAILABLE, "EGL version is too old!");
 
 	eglTerminate(tmp_display);
 #endif