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/**************************************************************************/
/* openxr_fb_foveation_extension.cpp */
/**************************************************************************/
/* 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. */
/**************************************************************************/
#include "openxr_fb_foveation_extension.h"
#include "core/config/project_settings.h"
OpenXRFBFoveationExtension *OpenXRFBFoveationExtension::singleton = nullptr;
OpenXRFBFoveationExtension *OpenXRFBFoveationExtension::get_singleton() {
return singleton;
}
OpenXRFBFoveationExtension::OpenXRFBFoveationExtension(const String &p_rendering_driver) {
singleton = this;
rendering_driver = p_rendering_driver;
swapchain_update_state_ext = OpenXRFBUpdateSwapchainExtension::get_singleton();
int fov_level = GLOBAL_GET("xr/openxr/foveation_level");
if (fov_level >= 0 && fov_level < 4) {
foveation_level = XrFoveationLevelFB(fov_level);
}
bool fov_dyn = GLOBAL_GET("xr/openxr/foveation_dynamic");
foveation_dynamic = fov_dyn ? XR_FOVEATION_DYNAMIC_LEVEL_ENABLED_FB : XR_FOVEATION_DYNAMIC_DISABLED_FB;
swapchain_create_info_foveation_fb.type = XR_TYPE_SWAPCHAIN_CREATE_INFO_FOVEATION_FB;
swapchain_create_info_foveation_fb.next = nullptr;
swapchain_create_info_foveation_fb.flags = 0;
}
OpenXRFBFoveationExtension::~OpenXRFBFoveationExtension() {
singleton = nullptr;
swapchain_update_state_ext = nullptr;
}
HashMap<String, bool *> OpenXRFBFoveationExtension::get_requested_extensions() {
HashMap<String, bool *> request_extensions;
if (rendering_driver == "vulkan") {
// This is currently only supported on OpenGL, but we may add Vulkan support in the future...
} else if (rendering_driver == "opengl3") {
request_extensions[XR_FB_FOVEATION_EXTENSION_NAME] = &fb_foveation_ext;
request_extensions[XR_FB_FOVEATION_CONFIGURATION_EXTENSION_NAME] = &fb_foveation_configuration_ext;
}
return request_extensions;
}
void OpenXRFBFoveationExtension::on_instance_created(const XrInstance p_instance) {
if (fb_foveation_ext) {
EXT_INIT_XR_FUNC(xrCreateFoveationProfileFB);
EXT_INIT_XR_FUNC(xrDestroyFoveationProfileFB);
}
if (fb_foveation_configuration_ext) {
// nothing to register here...
}
}
void OpenXRFBFoveationExtension::on_instance_destroyed() {
fb_foveation_ext = false;
fb_foveation_configuration_ext = false;
}
bool OpenXRFBFoveationExtension::is_enabled() const {
return swapchain_update_state_ext != nullptr && swapchain_update_state_ext->is_enabled() && fb_foveation_ext && fb_foveation_configuration_ext;
}
void *OpenXRFBFoveationExtension::set_swapchain_create_info_and_get_next_pointer(void *p_next_pointer) {
if (is_enabled()) {
swapchain_create_info_foveation_fb.next = p_next_pointer;
return &swapchain_create_info_foveation_fb;
} else {
return p_next_pointer;
}
}
void OpenXRFBFoveationExtension::on_main_swapchains_created() {
update_profile();
}
XrFoveationLevelFB OpenXRFBFoveationExtension::get_foveation_level() const {
return foveation_level;
}
void OpenXRFBFoveationExtension::set_foveation_level(XrFoveationLevelFB p_foveation_level) {
foveation_level = p_foveation_level;
// Update profile will do nothing if we're not yet initialized.
update_profile();
}
XrFoveationDynamicFB OpenXRFBFoveationExtension::get_foveation_dynamic() const {
return foveation_dynamic;
}
void OpenXRFBFoveationExtension::set_foveation_dynamic(XrFoveationDynamicFB p_foveation_dynamic) {
foveation_dynamic = p_foveation_dynamic;
// Update profile will do nothing if we're not yet initialized.
update_profile();
}
void OpenXRFBFoveationExtension::_update_profile() {
// Must be called from rendering thread!
ERR_NOT_ON_RENDER_THREAD;
OpenXRFBFoveationExtension *fov_ext = OpenXRFBFoveationExtension::get_singleton();
ERR_FAIL_NULL(fov_ext);
if (!fov_ext->is_enabled()) {
return;
}
OpenXRAPI *openxr_api = OpenXRAPI::get_singleton();
ERR_FAIL_NULL(openxr_api);
XrSwapchain main_color_swapchain = openxr_api->get_color_swapchain();
if (main_color_swapchain == XR_NULL_HANDLE) {
// Our swapchain hasn't been created yet, we'll call this again once it has.
return;
}
XrFoveationLevelProfileCreateInfoFB level_profile_create_info;
level_profile_create_info.type = XR_TYPE_FOVEATION_LEVEL_PROFILE_CREATE_INFO_FB;
level_profile_create_info.next = nullptr;
level_profile_create_info.level = fov_ext->foveation_level;
level_profile_create_info.verticalOffset = 0.0f;
level_profile_create_info.dynamic = fov_ext->foveation_dynamic;
XrFoveationProfileCreateInfoFB profile_create_info;
profile_create_info.type = XR_TYPE_FOVEATION_PROFILE_CREATE_INFO_FB;
profile_create_info.next = &level_profile_create_info;
XrFoveationProfileFB foveation_profile;
XrResult result = fov_ext->xrCreateFoveationProfileFB(openxr_api->get_session(), &profile_create_info, &foveation_profile);
if (XR_FAILED(result)) {
print_line("OpenXR: Unable to create the foveation profile [", openxr_api->get_error_string(result), "]");
return;
}
XrSwapchainStateFoveationFB foveation_update_state;
foveation_update_state.type = XR_TYPE_SWAPCHAIN_STATE_FOVEATION_FB;
foveation_update_state.profile = foveation_profile;
result = fov_ext->swapchain_update_state_ext->xrUpdateSwapchainFB(main_color_swapchain, (XrSwapchainStateBaseHeaderFB *)&foveation_update_state);
if (XR_FAILED(result)) {
print_line("OpenXR: Unable to update the swapchain [", openxr_api->get_error_string(result), "]");
// We still want to destroy our profile so keep going...
}
result = fov_ext->xrDestroyFoveationProfileFB(foveation_profile);
if (XR_FAILED(result)) {
print_line("OpenXR: Unable to destroy the foveation profile [", openxr_api->get_error_string(result), "]");
}
}
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