From 96b707215dea18bce739c60f3486cceade4c4f4f Mon Sep 17 00:00:00 2001
From: Bastiaan Olij <mux213@gmail.com>
Date: Sun, 27 Jun 2021 21:51:30 +1000
Subject: Add support for returning the play area from XRInterface

---
 modules/mobile_vr/doc_classes/MobileVRInterface.xml |  1 +
 modules/mobile_vr/mobile_vr_interface.cpp           | 13 +++++++++++++
 modules/mobile_vr/mobile_vr_interface.h             |  4 ++++
 3 files changed, 18 insertions(+)

(limited to 'modules/mobile_vr')

diff --git a/modules/mobile_vr/doc_classes/MobileVRInterface.xml b/modules/mobile_vr/doc_classes/MobileVRInterface.xml
index 04ba82ef51..18a77c8b8d 100644
--- a/modules/mobile_vr/doc_classes/MobileVRInterface.xml
+++ b/modules/mobile_vr/doc_classes/MobileVRInterface.xml
@@ -37,5 +37,6 @@
 		<member name="oversample" type="float" setter="set_oversample" getter="get_oversample" default="1.5">
 			The oversample setting. Because of the lens distortion we have to render our buffers at a higher resolution then the screen can natively handle. A value between 1.5 and 2.0 often provides good results but at the cost of performance.
 		</member>
+		<member name="xr_play_area_mode" type="int" setter="set_play_area_mode" getter="get_play_area_mode" override="true" enum="XRInterface.PlayAreaMode" default="1" />
 	</members>
 </class>
diff --git a/modules/mobile_vr/mobile_vr_interface.cpp b/modules/mobile_vr/mobile_vr_interface.cpp
index 7dd26c6905..ba7353ace2 100644
--- a/modules/mobile_vr/mobile_vr_interface.cpp
+++ b/modules/mobile_vr/mobile_vr_interface.cpp
@@ -370,6 +370,19 @@ void MobileVRInterface::uninitialize() {
 	};
 };
 
+bool MobileVRInterface::supports_play_area_mode(XRInterface::PlayAreaMode p_mode) {
+	// This interface has no positional tracking so fix this to 3DOF
+	return p_mode == XR_PLAY_AREA_3DOF;
+}
+
+XRInterface::PlayAreaMode MobileVRInterface::get_play_area_mode() const {
+	return XR_PLAY_AREA_3DOF;
+}
+
+bool MobileVRInterface::set_play_area_mode(XRInterface::PlayAreaMode p_mode) {
+	return p_mode == XR_PLAY_AREA_3DOF;
+}
+
 Size2 MobileVRInterface::get_render_target_size() {
 	_THREAD_SAFE_METHOD_
 
diff --git a/modules/mobile_vr/mobile_vr_interface.h b/modules/mobile_vr/mobile_vr_interface.h
index 34bd1da43b..b5bf966247 100644
--- a/modules/mobile_vr/mobile_vr_interface.h
+++ b/modules/mobile_vr/mobile_vr_interface.h
@@ -143,6 +143,10 @@ public:
 	virtual bool initialize() override;
 	virtual void uninitialize() override;
 
+	virtual bool supports_play_area_mode(XRInterface::PlayAreaMode p_mode) override;
+	virtual XRInterface::PlayAreaMode get_play_area_mode() const override;
+	virtual bool set_play_area_mode(XRInterface::PlayAreaMode p_mode) override;
+
 	virtual Size2 get_render_target_size() override;
 	virtual uint32_t get_view_count() override;
 	virtual Transform3D get_camera_transform() override;
-- 
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