| /* |
| * Copyright (C) 2021 Igalia, S.L. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * aint with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #include "config.h" |
| |
| #if ENABLE(WEBXR) && USE(OPENXR) |
| |
| #include "OpenXRExtensions.h" |
| #include "PlatformXROpenXR.h" |
| |
| #include <wtf/Scope.h> |
| |
| using namespace WebCore; |
| |
| namespace PlatformXR { |
| |
| struct Instance::Impl { |
| WTF_MAKE_STRUCT_FAST_ALLOCATED; |
| |
| Impl(); |
| ~Impl(); |
| |
| XrInstance xrInstance() const { return m_instance; } |
| WorkQueue& queue() const { return m_workQueue; } |
| OpenXRExtensions* extensions() { return m_extensions.get(); } |
| |
| private: |
| XrInstance m_instance { XR_NULL_HANDLE }; |
| Ref<WorkQueue> m_workQueue; |
| std::unique_ptr<OpenXRExtensions> m_extensions; |
| }; |
| |
| Instance::Impl::Impl() |
| : m_workQueue(WorkQueue::create("OpenXR queue")) |
| { |
| m_workQueue->dispatch([this]() { |
| LOG(XR, "OpenXR: initializing\n"); |
| |
| m_extensions = OpenXRExtensions::create(); |
| if (!m_extensions) |
| return; |
| |
| static const char* s_applicationName = "WebXR (WebKit)"; |
| static const uint32_t s_applicationVersion = 1; |
| |
| const char* const enabledExtensions[] = { |
| XR_KHR_OPENGL_ENABLE_EXTENSION_NAME, |
| XR_MNDX_EGL_ENABLE_EXTENSION_NAME |
| }; |
| |
| auto createInfo = createStructure<XrInstanceCreateInfo, XR_TYPE_INSTANCE_CREATE_INFO>(); |
| createInfo.createFlags = 0; |
| std::memcpy(createInfo.applicationInfo.applicationName, s_applicationName, XR_MAX_APPLICATION_NAME_SIZE); |
| createInfo.applicationInfo.apiVersion = XR_CURRENT_API_VERSION; |
| createInfo.applicationInfo.applicationVersion = s_applicationVersion; |
| createInfo.enabledApiLayerCount = 0; |
| createInfo.enabledExtensionCount = WTF_ARRAY_LENGTH(enabledExtensions); |
| createInfo.enabledExtensionNames = enabledExtensions; |
| |
| XrResult result = xrCreateInstance(&createInfo, &m_instance); |
| RETURN_IF_FAILED(result, "xrCreateInstance()", m_instance); |
| if (m_instance == XR_NULL_HANDLE) |
| return; |
| |
| m_extensions->loadMethods(m_instance); |
| |
| LOG(XR, "xrCreateInstance(): using instance %p\n", m_instance); |
| }); |
| } |
| |
| Instance::Impl::~Impl() |
| { |
| m_workQueue->dispatch([instance = m_instance] { |
| if (instance != XR_NULL_HANDLE) |
| xrDestroyInstance(instance); |
| }); |
| } |
| |
| Instance& Instance::singleton() |
| { |
| static LazyNeverDestroyed<Instance> s_instance; |
| static std::once_flag s_onceFlag; |
| std::call_once(s_onceFlag, |
| [&] { |
| s_instance.construct(); |
| }); |
| return s_instance.get(); |
| } |
| |
| Instance::Instance() |
| : m_impl(makeUniqueRef<Impl>()) |
| { |
| } |
| |
| void Instance::enumerateImmersiveXRDevices(CompletionHandler<void(const DeviceList& devices)>&& callback) |
| { |
| m_impl->queue().dispatch([this, callback = WTFMove(callback)]() mutable { |
| auto callbackOnExit = makeScopeExit([&]() { |
| callOnMainThread([callback = WTFMove(callback)]() mutable { |
| callback({ }); |
| }); |
| }); |
| |
| if (m_impl->xrInstance() == XR_NULL_HANDLE || !m_impl->extensions()) { |
| LOG(XR, "%s Unable to enumerate XR devices. No XrInstance present\n", __FUNCTION__); |
| return; |
| } |
| |
| auto systemGetInfo = createStructure<XrSystemGetInfo, XR_TYPE_SYSTEM_GET_INFO>(); |
| systemGetInfo.formFactor = XR_FORM_FACTOR_HEAD_MOUNTED_DISPLAY; |
| |
| XrSystemId systemId; |
| XrResult result = xrGetSystem(m_impl->xrInstance(), &systemGetInfo, &systemId); |
| RETURN_IF_FAILED(result, "xrGetSystem", m_impl->xrInstance()); |
| |
| callbackOnExit.release(); |
| |
| callOnMainThread([this, callback = WTFMove(callback), systemId]() mutable { |
| m_immersiveXRDevices = DeviceList::from(OpenXRDevice::create(m_impl->xrInstance(), systemId, m_impl->queue(), *m_impl->extensions(), [this, callback = WTFMove(callback)]() mutable { |
| ASSERT(isMainThread()); |
| callback(m_immersiveXRDevices); |
| })); |
| }); |
| }); |
| } |
| |
| |
| } // namespace PlatformXR |
| |
| #endif // ENABLE(WEBXR) && USE(OPENXR) |