1 files changed, 30 insertions, 0 deletions

diff --git a/modules/openxr/openxr_api.cpp b/modules/openxr/openxr_api.cpp
index 94095eb61c..511d111aaf 100644
--- a/modules/openxr/openxr_api.cpp
+++ b/modules/openxr/openxr_api.cpp
@@ -49,6 +49,7 @@
 #endif
 
 #include "extensions/openxr_htc_vive_tracker_extension.h"
+#include "extensions/openxr_palm_pose_extension.h"
 
 #include "modules/openxr/openxr_interface.h"
 
@@ -184,6 +185,20 @@ bool OpenXRAPI::is_extension_supported(const String &p_extension) const {
 	return false;
 }
 
+bool OpenXRAPI::is_path_supported(const String &p_path) {
+	// This checks with extensions whether a path is *unsupported* and returns false if this is so.
+	// This allows us to filter out paths that are only available if related extensions are supported.
+	// WARNING: This method will return true for unknown/mistyped paths as we have no way to validate those.
+
+	for (OpenXRExtensionWrapper *wrapper : registered_extension_wrappers) {
+		if (!wrapper->is_path_supported(p_path)) {
+			return false;
+		}
+	}
+
+	return true;
+}
+
 void OpenXRAPI::copy_string_to_char_buffer(const String p_string, char *p_buffer, int p_buffer_len) {
 	CharString char_string = p_string.utf8();
 	int len = char_string.length();
@@ -1382,6 +1397,10 @@ void OpenXRAPI::pre_render() {
 	// 2) It will use the previous timing to pause our thread so that rendering starts as close to displaying as possible
 	// This must thus be called as close to when we start rendering as possible
 	XrFrameWaitInfo frame_wait_info = { XR_TYPE_FRAME_WAIT_INFO, nullptr };
+	frame_state.predictedDisplayTime = 0;
+	frame_state.predictedDisplayPeriod = 0;
+	frame_state.shouldRender = false;
+
 	XrResult result = xrWaitFrame(session, &frame_wait_info, &frame_state);
 	if (XR_FAILED(result)) {
 		print_line("OpenXR: xrWaitFrame() was not successful [", get_error_string(result), "]");
@@ -1643,6 +1662,7 @@ OpenXRAPI::OpenXRAPI() {
 #endif
 
 	// register our other extensions
+	register_extension_wrapper(memnew(OpenXRPalmPoseExtension(this)));
 	register_extension_wrapper(memnew(OpenXRHTCViveTrackerExtension(this)));
 }
 
@@ -2063,6 +2083,11 @@ XrPath OpenXRAPI::get_interaction_profile_path(RID p_interaction_profile) {
 }
 
 RID OpenXRAPI::interaction_profile_create(const String p_name) {
+	if (!is_path_supported(p_name)) {
+		// The extension enabling this path must not be active, we will silently skip this interaction profile
+		return RID();
+	}
+
 	InteractionProfile new_interaction_profile;
 
 	XrResult result = xrStringToPath(instance, p_name.utf8().get_data(), &new_interaction_profile.path);
@@ -2099,6 +2124,11 @@ void OpenXRAPI::interaction_profile_clear_bindings(RID p_interaction_profile) {
 }
 
 bool OpenXRAPI::interaction_profile_add_binding(RID p_interaction_profile, RID p_action, const String p_path) {
+	if (!is_path_supported(p_path)) {
+		// The extension enabling this path must not be active, we will silently skip this binding
+		return false;
+	}
+
 	InteractionProfile *ip = interaction_profile_owner.get_or_null(p_interaction_profile);
 	ERR_FAIL_NULL_V(ip, false);