4 files changed, 32 insertions, 0 deletions
diff --git a/platform/linuxbsd/display_server_x11.cpp b/platform/linuxbsd/display_server_x11.cpp
index 5c6824cf44..a0a5522235 100644
--- a/platform/linuxbsd/display_server_x11.cpp
+++ b/platform/linuxbsd/display_server_x11.cpp
@@ -2068,6 +2068,24 @@ String DisplayServerX11::keyboard_get_layout_name(int p_index) const {
 	return ret;
 }
 
+Key DisplayServerX11::keyboard_get_keycode_from_physical(Key p_keycode) const {
+	unsigned int modifiers = p_keycode & KEY_MODIFIER_MASK;
+	unsigned int keycode_no_mod = p_keycode & KEY_CODE_MASK;
+	unsigned int xkeycode = KeyMappingX11::get_xlibcode((Key)keycode_no_mod);
+	KeySym xkeysym = XkbKeycodeToKeysym(x11_display, xkeycode, 0, 0);
+	if (xkeysym >= 'a' && xkeysym <= 'z') {
+		xkeysym -= ('a' - 'A');
+	}
+
+	Key key = KeyMappingX11::get_keycode(xkeysym);
+	// If not found, fallback to QWERTY.
+	// This should match the behavior of the event pump
+	if (key == KEY_NONE) {
+		return p_keycode;
+	}
+	return (Key)(key | modifiers);
+}
+
 DisplayServerX11::Property DisplayServerX11::_read_property(Display *p_display, Window p_window, Atom p_property) {
 	Atom actual_type = None;
 	int actual_format = 0;
diff --git a/platform/linuxbsd/display_server_x11.h b/platform/linuxbsd/display_server_x11.h
index 052c6d6b7b..1887c7105b 100644
--- a/platform/linuxbsd/display_server_x11.h
+++ b/platform/linuxbsd/display_server_x11.h
@@ -372,6 +372,7 @@ public:
 	virtual void keyboard_set_current_layout(int p_index) override;
 	virtual String keyboard_get_layout_language(int p_index) const override;
 	virtual String keyboard_get_layout_name(int p_index) const override;
+	virtual Key keyboard_get_keycode_from_physical(Key p_keycode) const override;
 
 	virtual void process_events() override;
 
diff --git a/platform/linuxbsd/key_mapping_x11.cpp b/platform/linuxbsd/key_mapping_x11.cpp
index a1ef28234d..829feda40a 100644
--- a/platform/linuxbsd/key_mapping_x11.cpp
+++ b/platform/linuxbsd/key_mapping_x11.cpp
@@ -309,6 +309,18 @@ unsigned int KeyMappingX11::get_scancode(unsigned int p_code) {
 	return keycode;
 }
 
+unsigned int KeyMappingX11::get_xlibcode(unsigned int p_keysym) {
+	unsigned int code = 0;
+	for (int i = 0; _scancode_to_keycode[i].keysym != KEY_UNKNOWN; i++) {
+		if (_scancode_to_keycode[i].keysym == p_keysym) {
+			code = _scancode_to_keycode[i].keycode;
+			break;
+		}
+	}
+
+	return code;
+}
+
 Key KeyMappingX11::get_keycode(KeySym p_keysym) {
 	// kinda bruteforce.. could optimize.
 
diff --git a/platform/linuxbsd/key_mapping_x11.h b/platform/linuxbsd/key_mapping_x11.h
index 598db1c45a..d4f1554671 100644
--- a/platform/linuxbsd/key_mapping_x11.h
+++ b/platform/linuxbsd/key_mapping_x11.h
@@ -45,6 +45,7 @@ class KeyMappingX11 {
 
 public:
 	static Key get_keycode(KeySym p_keysym);
+	static unsigned int get_xlibcode(unsigned int p_keysym);
 	static unsigned int get_scancode(unsigned int p_code);
 	static KeySym get_keysym(Key p_code);
 	static unsigned int get_unicode_from_keysym(KeySym p_keysym);