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Adding support for the OpenXR Display Refresh Rate extension

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Bastiaan Olij
2022-10-10 18:51:53 +11:00
parent ca25c6e0a3
commit e14717bb2e
8 changed files with 280 additions and 0 deletions
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modules/openxr/extensions/openxr_fb_display_refresh_rate_extension.cpp Normal file
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/*************************************************************************/
/* openxr_fb_display_refresh_rate_extension.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* 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_display_refresh_rate_extension.h"
OpenXRDisplayRefreshRateExtension *OpenXRDisplayRefreshRateExtension::singleton = nullptr;
OpenXRDisplayRefreshRateExtension *OpenXRDisplayRefreshRateExtension::get_singleton() {
return singleton;
}
OpenXRDisplayRefreshRateExtension::OpenXRDisplayRefreshRateExtension(OpenXRAPI *p_openxr_api) :
OpenXRExtensionWrapper(p_openxr_api) {
singleton = this;
// Extensions we use for our hand tracking.
request_extensions[XR_FB_DISPLAY_REFRESH_RATE_EXTENSION_NAME] = &display_refresh_rate_ext;
}
OpenXRDisplayRefreshRateExtension::~OpenXRDisplayRefreshRateExtension() {
display_refresh_rate_ext = false;
}
void OpenXRDisplayRefreshRateExtension::on_instance_created(const XrInstance p_instance) {
if (display_refresh_rate_ext) {
EXT_INIT_XR_FUNC(xrEnumerateDisplayRefreshRatesFB);
EXT_INIT_XR_FUNC(xrGetDisplayRefreshRateFB);
EXT_INIT_XR_FUNC(xrRequestDisplayRefreshRateFB);
}
}
void OpenXRDisplayRefreshRateExtension::on_instance_destroyed() {
display_refresh_rate_ext = false;
}
float OpenXRDisplayRefreshRateExtension::get_refresh_rate() const {
float refresh_rate = 0.0;
if (display_refresh_rate_ext) {
float rate;
XrResult result = xrGetDisplayRefreshRateFB(openxr_api->get_session(), &rate);
if (XR_FAILED(result)) {
print_line("OpenXR: Failed to obtain refresh rate [", openxr_api->get_error_string(result), "]");
} else {
refresh_rate = rate;
}
}
return refresh_rate;
}
void OpenXRDisplayRefreshRateExtension::set_refresh_rate(float p_refresh_rate) {
if (display_refresh_rate_ext) {
XrResult result = xrRequestDisplayRefreshRateFB(openxr_api->get_session(), p_refresh_rate);
if (XR_FAILED(result)) {
print_line("OpenXR: Failed to set refresh rate [", openxr_api->get_error_string(result), "]");
}
}
}
Array OpenXRDisplayRefreshRateExtension::get_available_refresh_rates() const {
Array arr;
XrResult result;
if (display_refresh_rate_ext) {
uint32_t display_refresh_rate_count = 0;
result = xrEnumerateDisplayRefreshRatesFB(openxr_api->get_session(), 0, &display_refresh_rate_count, nullptr);
if (XR_FAILED(result)) {
print_line("OpenXR: Failed to obtain refresh rates count [", openxr_api->get_error_string(result), "]");
}
if (display_refresh_rate_count > 0) {
float *display_refresh_rates = (float *)memalloc(sizeof(float) * display_refresh_rate_count);
if (display_refresh_rates == nullptr) {
print_line("OpenXR: Failed to obtain refresh rates memory buffer [", openxr_api->get_error_string(result), "]");
return arr;
}
result = xrEnumerateDisplayRefreshRatesFB(openxr_api->get_session(), display_refresh_rate_count, &display_refresh_rate_count, display_refresh_rates);
if (XR_FAILED(result)) {
print_line("OpenXR: Failed to obtain refresh rates count [", openxr_api->get_error_string(result), "]");
memfree(display_refresh_rates);
return arr;
}
for (uint32_t i = 0; i < display_refresh_rate_count; i++) {
float refresh_rate = display_refresh_rates[i];
arr.push_back(Variant(refresh_rate));
}
memfree(display_refresh_rates);
}
}
return arr;
}