Check if RD is supported in the ProjectManager and disable creating RD projects if not supported.

editor/project_manager/project_dialog.cpp

@@ -428,6 +428,8 @@ void ProjectDialog::_renderer_selected() {
 
 	String renderer_type = renderer_button_group->get_pressed_button()->get_meta(SNAME("rendering_method"));
 
+	bool rd_error = false;
+
 	if (renderer_type == "forward_plus") {
 		renderer_info->set_text(
 				String::utf8("•  ") + TTR("Supports desktop platforms only.") +
@@ -435,6 +437,7 @@ void ProjectDialog::_renderer_selected() {
 				String::utf8("\n•  ") + TTR("Can scale to large complex scenes.") +
 				String::utf8("\n•  ") + TTR("Uses RenderingDevice backend.") +
 				String::utf8("\n•  ") + TTR("Slower rendering of simple scenes."));
+		rd_error = !rendering_device_supported;
 	} else if (renderer_type == "mobile") {
 		renderer_info->set_text(
 				String::utf8("•  ") + TTR("Supports desktop + mobile platforms.") +
@@ -442,16 +445,24 @@ void ProjectDialog::_renderer_selected() {
 				String::utf8("\n•  ") + TTR("Less scalable for complex scenes.") +
 				String::utf8("\n•  ") + TTR("Uses RenderingDevice backend.") +
 				String::utf8("\n•  ") + TTR("Fast rendering of simple scenes."));
+		rd_error = !rendering_device_supported;
 	} else if (renderer_type == "gl_compatibility") {
 		renderer_info->set_text(
 				String::utf8("•  ") + TTR("Supports desktop, mobile + web platforms.") +
-				String::utf8("\n•  ") + TTR("Least advanced 3D graphics (currently work-in-progress).") +
+				String::utf8("\n•  ") + TTR("Least advanced 3D graphics.") +
 				String::utf8("\n•  ") + TTR("Intended for low-end/older devices.") +
 				String::utf8("\n•  ") + TTR("Uses OpenGL 3 backend (OpenGL 3.3/ES 3.0/WebGL2).") +
 				String::utf8("\n•  ") + TTR("Fastest rendering of simple scenes."));
 	} else {
 		WARN_PRINT("Unknown renderer type. Please report this as a bug on GitHub.");
 	}
+
+	rd_not_supported->set_visible(rd_error);
+	get_ok_button()->set_disabled(rd_error);
+	if (rd_error) {
+		// Needs to be set here since theme colors aren't available at startup.
+		rd_not_supported->add_theme_color_override(SceneStringName(font_color), get_theme_color(SNAME("error_color"), EditorStringName(Editor)));
+	}
 }
 
 void ProjectDialog::_nonempty_confirmation_ok_pressed() {
@@ -903,10 +914,16 @@ ProjectDialog::ProjectDialog() {
 		default_renderer_type = EditorSettings::get_singleton()->get_setting("project_manager/default_renderer");
 	}
 
+	rendering_device_supported = DisplayServer::can_create_rendering_device();
+
+	if (!rendering_device_supported) {
+		default_renderer_type = "gl_compatibility";
+	}
+
 	Button *rs_button = memnew(CheckBox);
 	rs_button->set_button_group(renderer_button_group);
 	rs_button->set_text(TTR("Forward+"));
-#if defined(WEB_ENABLED)
+#ifndef RD_ENABLED
 	rs_button->set_disabled(true);
 #endif
 	rs_button->set_meta(SNAME("rendering_method"), "forward_plus");
@@ -918,7 +935,7 @@ ProjectDialog::ProjectDialog() {
 	rs_button = memnew(CheckBox);
 	rs_button->set_button_group(renderer_button_group);
 	rs_button->set_text(TTR("Mobile"));
-#if defined(WEB_ENABLED)
+#ifndef RD_ENABLED
 	rs_button->set_disabled(true);
 #endif
 	rs_button->set_meta(SNAME("rendering_method"), "mobile");
@@ -950,6 +967,15 @@ ProjectDialog::ProjectDialog() {
 	renderer_info = memnew(Label);
 	renderer_info->set_modulate(Color(1, 1, 1, 0.7));
 	rvb->add_child(renderer_info);
+
+	rd_not_supported = memnew(Label);
+	rd_not_supported->set_text(TTR("Rendering Device backend not available. Please use the Compatibility renderer."));
+	rd_not_supported->set_horizontal_alignment(HORIZONTAL_ALIGNMENT_CENTER);
+	rd_not_supported->set_custom_minimum_size(Size2(200, 0) * EDSCALE);
+	rd_not_supported->set_autowrap_mode(TextServer::AUTOWRAP_WORD_SMART);
+	rd_not_supported->set_visible(false);
+	renderer_container->add_child(rd_not_supported);
+
 	_renderer_selected();
 
 	l = memnew(Label);

editor/project_manager/project_dialog.h

@@ -77,6 +77,8 @@ private:
 	Label *renderer_info = nullptr;
 	HBoxContainer *default_files_container = nullptr;
 	Ref<ButtonGroup> renderer_button_group;
+	bool rendering_device_supported = false;
+	Label *rd_not_supported = nullptr;
 
 	Label *msg = nullptr;
 	LineEdit *project_name = nullptr;

servers/display_server.cpp

@@ -34,6 +34,14 @@
 #include "scene/resources/texture.h"
 #include "servers/display_server_headless.h"
 
+#if defined(VULKAN_ENABLED)
+#include "drivers/vulkan/rendering_context_driver_vulkan.h"
+#undef CursorShape
+#endif
+#if defined(D3D12_ENABLED)
+#include "drivers/d3d12/rendering_context_driver_d3d12.h"
+#endif
+
 DisplayServer *DisplayServer::singleton = nullptr;
 
 bool DisplayServer::hidpi_allowed = false;
@@ -1211,6 +1219,40 @@ void DisplayServer::_input_set_custom_mouse_cursor_func(const Ref<Resource> &p_i
 	singleton->cursor_set_custom_image(p_image, (CursorShape)p_shape, p_hostspot);
 }
 
+bool DisplayServer::can_create_rendering_device() {
+#if defined(RD_ENABLED)
+	Error err;
+	RenderingContextDriver *rcd = nullptr;
+
+#if defined(VULKAN_ENABLED)
+	rcd = memnew(RenderingContextDriverVulkan);
+#endif
+#ifdef D3D12_ENABLED
+	if (rcd == nullptr) {
+		rcd = memnew(RenderingContextDriverD3D12);
+	}
+#endif
+
+	if (rcd != nullptr) {
+		err = rcd->initialize();
+		if (err == OK) {
+			RenderingDevice *rd = memnew(RenderingDevice);
+			err = rd->initialize(rcd);
+			memdelete(rd);
+			rd = nullptr;
+			if (err == OK) {
+				return true;
+			}
+		}
+
+		memdelete(rcd);
+		rcd = nullptr;
+	}
+
+#endif // RD_ENABLED
+	return false;
+}
+
 DisplayServer::DisplayServer() {
 	singleton = this;
 	Input::set_mouse_mode_func = _input_set_mouse_mode;

servers/display_server.h

@@ -594,6 +594,8 @@ public:
 	static Vector<String> get_create_function_rendering_drivers(int p_index);
 	static DisplayServer *create(int p_index, const String &p_rendering_driver, WindowMode p_mode, VSyncMode p_vsync_mode, uint32_t p_flags, const Vector2i *p_position, const Vector2i &p_resolution, int p_screen, Context p_context, Error &r_error);
 
+	static bool can_create_rendering_device();
+
 	DisplayServer();
 	~DisplayServer();
 };