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/**************************************************************************/
/* openxr_composition_layer_extension.h */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2024-present Redot Engine contributors */
/* (see REDOT_AUTHORS.md) */
/* 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_COMPOSITION_LAYER_EXTENSION_H
#define OPENXR_COMPOSITION_LAYER_EXTENSION_H
#include "openxr_composition_layer_provider.h"
#include "openxr_extension_wrapper.h"
#include "../openxr_api.h"
#ifdef ANDROID_ENABLED
#include <jni.h>
// Copied here from openxr_platform.h, in order to avoid including that whole header,
// which can cause compilation issues on some platforms.
typedef XrResult(XRAPI_PTR *PFN_xrCreateSwapchainAndroidSurfaceKHR)(XrSession session, const XrSwapchainCreateInfo *info, XrSwapchain *swapchain, jobject *surface);
#endif
class JavaObject;
class OpenXRViewportCompositionLayerProvider;
// This extension provides access to composition layers for displaying 2D content through the XR compositor.
// OpenXRCompositionLayerExtension enables the extensions related to this functionality
class OpenXRCompositionLayerExtension : public OpenXRExtensionWrapper, public OpenXRCompositionLayerProvider {
public:
static OpenXRCompositionLayerExtension *get_singleton();
OpenXRCompositionLayerExtension();
virtual ~OpenXRCompositionLayerExtension() 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_session) override;
virtual void on_session_destroyed() override;
virtual void on_pre_render() override;
virtual int get_composition_layer_count() override;
virtual XrCompositionLayerBaseHeader *get_composition_layer(int p_index) override;
virtual int get_composition_layer_order(int p_index) override;
void register_viewport_composition_layer_provider(OpenXRViewportCompositionLayerProvider *p_composition_layer);
void unregister_viewport_composition_layer_provider(OpenXRViewportCompositionLayerProvider *p_composition_layer);
bool is_available(XrStructureType p_which);
bool is_android_surface_swapchain_available() { return android_surface_ext_available; }
#ifdef ANDROID_ENABLED
bool create_android_surface_swapchain(XrSwapchainCreateInfo *p_info, XrSwapchain *r_swapchain, jobject *r_surface);
void free_android_surface_swapchain(XrSwapchain p_swapchain);
#endif
private:
static OpenXRCompositionLayerExtension *singleton;
Vector<OpenXRViewportCompositionLayerProvider *> composition_layers;
bool cylinder_ext_available = false;
bool equirect_ext_available = false;
bool android_surface_ext_available = false;
#ifdef ANDROID_ENABLED
Vector<XrSwapchain> android_surface_swapchain_free_queue;
void free_queued_android_surface_swapchains();
EXT_PROTO_XRRESULT_FUNC1(xrDestroySwapchain, (XrSwapchain), swapchain)
EXT_PROTO_XRRESULT_FUNC4(xrCreateSwapchainAndroidSurfaceKHR, (XrSession), session, (const XrSwapchainCreateInfo *), info, (XrSwapchain *), swapchain, (jobject *), surface)
#endif
};
class OpenXRViewportCompositionLayerProvider {
XrCompositionLayerBaseHeader *composition_layer = nullptr;
int sort_order = 1;
bool alpha_blend = false;
Dictionary extension_property_values;
bool extension_property_values_changed = true;
struct {
RID viewport;
Size2i viewport_size;
OpenXRAPI::OpenXRSwapChainInfo swapchain_info;
bool static_image = false;
} subviewport;
#ifdef ANDROID_ENABLED
struct {
XrSwapchain swapchain = XR_NULL_HANDLE;
Ref<JavaObject> surface;
} android_surface;
#endif
bool use_android_surface = false;
Size2i swapchain_size;
OpenXRAPI *openxr_api = nullptr;
OpenXRCompositionLayerExtension *composition_layer_extension = nullptr;
// Only for SubViewports.
bool update_and_acquire_swapchain(bool p_static_image);
RID get_current_swapchain_texture();
void update_swapchain_sub_image(XrSwapchainSubImage &r_swapchain_sub_image);
void free_swapchain();
#ifdef ANDROID_ENABLED
void create_android_surface();
#endif
public:
XrStructureType get_openxr_type() { return composition_layer->type; }
void set_sort_order(int p_sort_order) { sort_order = p_sort_order; }
int get_sort_order() const { return sort_order; }
void set_alpha_blend(bool p_alpha_blend);
bool get_alpha_blend() const { return alpha_blend; }
void set_viewport(RID p_viewport, Size2i p_size);
RID get_viewport() const { return subviewport.viewport; }
void set_use_android_surface(bool p_enable, Size2i p_size);
bool get_use_android_surface() const { return use_android_surface; }
Ref<JavaObject> get_android_surface();
void set_extension_property_values(const Dictionary &p_property_values);
void on_pre_render();
XrCompositionLayerBaseHeader *get_composition_layer();
OpenXRViewportCompositionLayerProvider(XrCompositionLayerBaseHeader *p_composition_layer);
~OpenXRViewportCompositionLayerProvider();
};
#endif // OPENXR_COMPOSITION_LAYER_EXTENSION_H
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