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/**************************************************************************/
/* openxr_visibility_mask_extension.h */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/**************************************************************************/
#ifndef OPENXR_VISIBILITY_MASK_EXTENSION_H
#define OPENXR_VISIBILITY_MASK_EXTENSION_H
#include "../util.h"
#include "core/templates/vector.h"
#include "openxr_extension_wrapper.h"
#include "scene/resources/mesh.h"
// The OpenXR visibility mask extension provides a mesh for each eye that
// can be used as a mask to determine which part of our rendered result
// is actually visible to the user. Due to lens distortion the edges of
// the rendered image are never used in the final result output on the HMD.
//
// Blacking out this are of the render result can remove a fair amount of
// overhead in rendering part of the screen that is unused.
//
// https://registry.khronos.org/OpenXR/specs/1.0/html/xrspec.html#XR_KHR_visibility_mask
class OpenXRVisibilityMaskExtension : public OpenXRExtensionWrapper {
public:
static OpenXRVisibilityMaskExtension *get_singleton();
OpenXRVisibilityMaskExtension();
virtual ~OpenXRVisibilityMaskExtension() override;
virtual HashMap<String, bool *> get_requested_extensions() override;
virtual void on_instance_created(const XrInstance p_instance) override;
virtual void on_session_created(const XrSession p_instance) override;
virtual void on_session_destroyed() override;
virtual void on_pre_render() override;
virtual bool on_event_polled(const XrEventDataBuffer &event) override;
bool is_available();
RID get_mesh();
private:
static OpenXRVisibilityMaskExtension *singleton;
bool available = false;
bool is_dirty = false;
RID shader;
RID material;
RID mesh;
struct MeshData {
Vector<XrVector2f> vertices;
Vector<uint32_t> indices;
};
uint32_t mesh_count = 0;
MeshData mesh_data[4];
void _update_mesh_data(uint32_t p_view);
void _update_mesh();
// OpenXR API call wrappers
EXT_PROTO_XRRESULT_FUNC5(xrGetVisibilityMaskKHR, (XrSession), session, (XrViewConfigurationType), viewConfigurationType, (uint32_t), viewIndex, (XrVisibilityMaskTypeKHR), visibilityMaskType, (XrVisibilityMaskKHR *), visibilityMask);
};
#endif // OPENXR_VISIBILITY_MASK_EXTENSION_H
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