Attachment 393639 Details for Bug 208702 – Patch for landing v3

[patch] Patch for landing v3

bug-208702-20200316105147.patch (text/plain), 327.78 KB, created by Sergio Villar Senin on 2020-03-16 02:51:52 PDT

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Creator: Sergio Villar Senin

Created: 2020-03-16 02:51:52 PDT

Size: 327.78 KB

patch

obsolete

>Subversion Revision: 258489
>diff --git a/Source/JavaScriptCore/ChangeLog b/Source/JavaScriptCore/ChangeLog
>index c11a293937fbb18240bf032ed61854dc61dd052c..7455aaf1df25d61e653c984c78dfb6722809d7d7 100644
>--- a/Source/JavaScriptCore/ChangeLog
>+++ b/Source/JavaScriptCore/ChangeLog
>@@ -1,3 +1,12 @@
>+2020-03-13  Sergio Villar Senin  <svillar@igalia.com>
>+
>+        [WebXR] IDLs, stubs and build configuration for WPE
>+        https://bugs.webkit.org/show_bug.cgi?id=208702
>+
>+        Reviewed by Dean Jackson.
>+
>+        * Configurations/FeatureDefines.xcconfig: Added ENABLE_WEBXR, off by default.
>+
> 2020-03-15  Yusuke Suzuki  <ysuzuki@apple.com>
> 
>         reportZappedCellAndCrash should handle PreciseAllocation in IsoSubspace
>diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
>index e31455490234b4a81e666ade66ad7a7799f1cea6..d1e53259cbf5166e1e53928ee3ecd807d96c3ad2 100644
>--- a/Source/WebCore/ChangeLog
>+++ b/Source/WebCore/ChangeLog
>@@ -1,3 +1,216 @@
>+2020-03-13  Sergio Villar Senin  <svillar@igalia.com>
>+
>+        [WebXR] IDLs, stubs and build configuration for WPE
>+        https://bugs.webkit.org/show_bug.cgi?id=208702
>+
>+        Reviewed by Dean Jackson.
>+
>+        Added the IDLs defined by the spec with very basic empty implementations to get them
>+        built. Apart from that a very basic implementation of the required platform code using
>+        OpenXR API was also added.
>+
>+        No new tests as no new functionality was really added (empty implementations). However
>+        follow up patches will import the already available WPT tests for WebXR.
>+
>+        Largely based on previous work by Å½an DoberÅ¡ek.
>+
>+        * CMakeLists.txt:
>+        * Configurations/FeatureDefines.xcconfig: Added ENABLE_WEBXR off by default.
>+        * DerivedSources.make:
>+        * Modules/webxr/NavigatorWebXR.cpp: Added.
>+        (WebCore::NavigatorWebXR::xr):
>+        (WebCore::NavigatorWebXR::from):
>+        * Modules/webxr/NavigatorWebXR.h: Added.
>+        * Modules/webxr/NavigatorWebXR.idl: Added.
>+        * Modules/webxr/WebXRBoundedReferenceSpace.cpp: Added.
>+        (WebCore::WebXRBoundedReferenceSpace::boundsGeometry const):
>+        * Modules/webxr/WebXRBoundedReferenceSpace.h: Added.
>+        * Modules/webxr/WebXRBoundedReferenceSpace.idl: Added.
>+        * Modules/webxr/WebXRFrame.cpp: Added.
>+        (WebCore::WebXRFrame::create):
>+        (WebCore::WebXRFrame::WebXRFrame):
>+        (WebCore::WebXRFrame::session const):
>+        (WebCore::WebXRFrame::getViewerPose):
>+        (WebCore::WebXRFrame::getPose):
>+        * Modules/webxr/WebXRFrame.h: Added.
>+        * Modules/webxr/WebXRFrame.idl: Added.
>+        * Modules/webxr/WebXRInputSource.cpp: Added.
>+        (WebCore::WebXRInputSource::create):
>+        (WebCore::WebXRInputSource::WebXRInputSource):
>+        (WebCore::WebXRInputSource::handedness const):
>+        (WebCore::WebXRInputSource::targetRayMode const):
>+        (WebCore::WebXRInputSource::targetRaySpace const):
>+        (WebCore::WebXRInputSource::gripSpace const):
>+        (WebCore::WebXRInputSource::profiles const):
>+        * Modules/webxr/WebXRInputSource.h: Added.
>+        * Modules/webxr/WebXRInputSource.idl: Added.
>+        * Modules/webxr/WebXRInputSourceArray.cpp: Added.
>+        (WebCore::WebXRInputSourceArray::length const):
>+        (WebCore::WebXRInputSourceArray::item const):
>+        * Modules/webxr/WebXRInputSourceArray.h: Added.
>+        * Modules/webxr/WebXRInputSourceArray.idl: Added.
>+        * Modules/webxr/WebXRPose.cpp: Added.
>+        (WebCore::WebXRPose::create):
>+        (WebCore::WebXRPose::WebXRPose):
>+        (WebCore::WebXRPose::transform const):
>+        (WebCore::WebXRPose::emulatedPosition const):
>+        * Modules/webxr/WebXRPose.h: Added.
>+        * Modules/webxr/WebXRPose.idl: Added.
>+        * Modules/webxr/WebXRReferenceSpace.cpp: Added.
>+        (WebCore::WebXRReferenceSpace::WebXRReferenceSpace):
>+        (WebCore::WebXRReferenceSpace::getOffsetReferenceSpace):
>+        * Modules/webxr/WebXRReferenceSpace.h: Added.
>+        * Modules/webxr/WebXRReferenceSpace.idl: Added.
>+        * Modules/webxr/WebXRRenderState.cpp: Added.
>+        (WebCore::WebXRRenderState::create):
>+        (WebCore::WebXRRenderState::WebXRRenderState):
>+        (WebCore::WebXRRenderState::depthNear const):
>+        (WebCore::WebXRRenderState::depthFar const):
>+        (WebCore::WebXRRenderState::inlineVerticalFieldOfView const):
>+        (WebCore::WebXRRenderState::baseLayer const):
>+        * Modules/webxr/WebXRRenderState.h: Added.
>+        * Modules/webxr/WebXRRenderState.idl: Added.
>+        * Modules/webxr/WebXRRigidTransform.cpp: Added.
>+        (WebCore::WebXRRigidTransform::create):
>+        (WebCore::WebXRRigidTransform::WebXRRigidTransform):
>+        (WebCore::WebXRRigidTransform::position const):
>+        (WebCore::WebXRRigidTransform::orientation const):
>+        (WebCore::WebXRRigidTransform::matrix const):
>+        (WebCore::WebXRRigidTransform::inverse const):
>+        * Modules/webxr/WebXRRigidTransform.h: Added.
>+        * Modules/webxr/WebXRRigidTransform.idl: Added.
>+        * Modules/webxr/WebXRSession.cpp: Added.
>+        (WebCore::WebXRSession::environmentBlendMode const):
>+        (WebCore::WebXRSession::visibilityState const):
>+        (WebCore::WebXRSession::renderState const):
>+        (WebCore::WebXRSession::inputSources const):
>+        (WebCore::WebXRSession::updateRenderState):
>+        (WebCore::WebXRSession::requestReferenceSpace):
>+        (WebCore::WebXRSession::requestAnimationFrame):
>+        (WebCore::WebXRSession::cancelAnimationFrame):
>+        (WebCore::WebXRSession::end):
>+        (WebCore::WebXRSession::activeDOMObjectName const):
>+        (WebCore::WebXRSession::stop):
>+        * Modules/webxr/WebXRSession.h: Added.
>+        * Modules/webxr/WebXRSession.idl: Added.
>+        * Modules/webxr/WebXRSpace.cpp: Added.
>+        (WebCore::WebXRSpace::WebXRSpace):
>+        * Modules/webxr/WebXRSpace.h: Added.
>+        * Modules/webxr/WebXRSpace.idl: Added.
>+        * Modules/webxr/WebXRSystem.cpp: Added.
>+        (WebCore::WebXRSystem::create):
>+        (WebCore::WebXRSystem::WebXRSystem):
>+        (WebCore::WebXRSystem::isSessionSupported):
>+        (WebCore::WebXRSystem::requestSession):
>+        (WebCore::WebXRSystem::activeDOMObjectName const):
>+        (WebCore::WebXRSystem::stop):
>+        * Modules/webxr/WebXRSystem.h: Added.
>+        * Modules/webxr/WebXRSystem.idl: Added.
>+        * Modules/webxr/WebXRView.cpp: Added.
>+        (WebCore::WebXRView::create):
>+        (WebCore::WebXRView::WebXRView):
>+        (WebCore::WebXRView::eye const):
>+        (WebCore::WebXRView::projectionMatrix const):
>+        (WebCore::WebXRView::transform const):
>+        * Modules/webxr/WebXRView.h: Added.
>+        * Modules/webxr/WebXRView.idl: Added.
>+        * Modules/webxr/WebXRViewerPose.cpp: Added.
>+        (WebCore::WebXRViewerPose::create):
>+        (WebCore::WebXRViewerPose::views const):
>+        * Modules/webxr/WebXRViewerPose.h: Added.
>+        * Modules/webxr/WebXRViewerPose.idl: Added.
>+        * Modules/webxr/WebXRViewport.cpp: Added.
>+        (WebCore::WebXRViewport::create):
>+        (WebCore::WebXRViewport::x const):
>+        (WebCore::WebXRViewport::y const):
>+        (WebCore::WebXRViewport::width const):
>+        (WebCore::WebXRViewport::height const):
>+        * Modules/webxr/WebXRViewport.h: Added.
>+        * Modules/webxr/WebXRViewport.idl: Added.
>+        * Modules/webxr/WebXRWebGLLayer.cpp: Added.
>+        (WebCore::WebXRWebGLLayer::create):
>+        (WebCore::WebXRWebGLLayer::WebXRWebGLLayer):
>+        (WebCore::WebXRWebGLLayer::antialias const):
>+        (WebCore::WebXRWebGLLayer::ignoreDepthValues const):
>+        (WebCore::WebXRWebGLLayer::framebuffer const):
>+        (WebCore::WebXRWebGLLayer::framebufferWidth const):
>+        (WebCore::WebXRWebGLLayer::framebufferHeight const):
>+        (WebCore::WebXRWebGLLayer::getViewport):
>+        (WebCore::WebXRWebGLLayer::getNativeFramebufferScaleFactor):
>+        * Modules/webxr/WebXRWebGLLayer.h: Added.
>+        * Modules/webxr/WebXRWebGLLayer.idl: Added.
>+        * Modules/webxr/XREnvironmentBlendMode.h: Added.
>+        * Modules/webxr/XREnvironmentBlendMode.idl: Added.
>+        * Modules/webxr/XREye.h: Added.
>+        * Modules/webxr/XREye.idl: Added.
>+        * Modules/webxr/XRFrameRequestCallback.h: Added.
>+        * Modules/webxr/XRFrameRequestCallback.idl: Added.
>+        * Modules/webxr/XRHandedness.h: Added.
>+        * Modules/webxr/XRHandedness.idl: Added.
>+        * Modules/webxr/XRInputSourceEvent.cpp: Added.
>+        (WebCore::XRInputSourceEvent::create):
>+        (WebCore::XRInputSourceEvent::XRInputSourceEvent):
>+        (WebCore::XRInputSourceEvent::frame const):
>+        (WebCore::XRInputSourceEvent::inputSource const):
>+        (WebCore::XRInputSourceEvent::buttonIndex const):
>+        * Modules/webxr/XRInputSourceEvent.h: Added.
>+        * Modules/webxr/XRInputSourceEvent.idl: Added.
>+        * Modules/webxr/XRInputSourcesChangeEvent.cpp: Added.
>+        (WebCore::XRInputSourcesChangeEvent::create):
>+        (WebCore::XRInputSourcesChangeEvent::XRInputSourcesChangeEvent):
>+        (WebCore::XRInputSourcesChangeEvent::session const):
>+        (WebCore::XRInputSourcesChangeEvent::added const):
>+        (WebCore::XRInputSourcesChangeEvent::removed const):
>+        * Modules/webxr/XRInputSourcesChangeEvent.h: Added.
>+        * Modules/webxr/XRInputSourcesChangeEvent.idl: Added.
>+        * Modules/webxr/XRReferenceSpaceEvent.cpp: Added.
>+        (WebCore::XRReferenceSpaceEvent::create):
>+        (WebCore::XRReferenceSpaceEvent::XRReferenceSpaceEvent):
>+        (WebCore::XRReferenceSpaceEvent::referenceSpace const):
>+        (WebCore::XRReferenceSpaceEvent::transform const):
>+        * Modules/webxr/XRReferenceSpaceEvent.h: Added.
>+        * Modules/webxr/XRReferenceSpaceEvent.idl: Added.
>+        * Modules/webxr/XRReferenceSpaceType.h: Added.
>+        * Modules/webxr/XRReferenceSpaceType.idl: Added.
>+        * Modules/webxr/XRRenderStateInit.h: Added.
>+        * Modules/webxr/XRRenderStateInit.idl: Added.
>+        * Modules/webxr/XRSessionEvent.cpp: Added.
>+        (WebCore::XRSessionEvent::create):
>+        (WebCore::XRSessionEvent::XRSessionEvent):
>+        (WebCore::XRSessionEvent::session const):
>+        * Modules/webxr/XRSessionEvent.h: Added.
>+        * Modules/webxr/XRSessionEvent.idl: Added.
>+        * Modules/webxr/XRSessionInit.h: Added.
>+        * Modules/webxr/XRSessionInit.idl: Added.
>+        * Modules/webxr/XRSessionMode.h: Added.
>+        * Modules/webxr/XRSessionMode.idl: Added.
>+        * Modules/webxr/XRTargetRayMode.h: Added.
>+        * Modules/webxr/XRTargetRayMode.idl: Added.
>+        * Modules/webxr/XRVisibilityState.h: Added.
>+        * Modules/webxr/XRVisibilityState.idl: Added.
>+        * Modules/webxr/XRWebGLLayerInit.h: Added.
>+        * Modules/webxr/XRWebGLLayerInit.idl: Added.
>+        * PlatformWPE.cmake: Added OpenXR libraries and include paths.
>+        * Sources.txt: Added new cpp files.
>+        * WebCore.xcodeproj/project.pbxproj: Added new files.
>+        * bindings/IDLTypes.h: Added SequenceStorageType.
>+        * bindings/js/JSDOMConvertSequences.h:
>+        * bindings/js/WebCoreBuiltinNames.h:
>+        * dom/EventNames.h:
>+        * dom/EventNames.in: Added WebXR events.
>+        * dom/EventTargetFactory.in: Added WebXR event targets.
>+        * page/RuntimeEnabledFeatures.h: Added new runtime feature for WebXR.
>+        (WebCore::RuntimeEnabledFeatures::setWebXREnabled):
>+        (WebCore::RuntimeEnabledFeatures::webXREnabled const):
>+        * platform/xr/PlatformXR.cpp: Added.
>+        * platform/xr/PlatformXR.h: Added.
>+        * platform/xr/openxr/PlatformXR.cpp: Added.
>+        (PlatformXR::createStructure): Utility function to create OpenXR structs.
>+        (PlatformXR::resultToString): Translates OpenXR error codes to strings.
>+        (PlatformXR::Instance::Impl::Impl):
>+        (PlatformXR::Instance::Impl::~Impl):
>+        (PlatformXR::Instance::singleton):
>+
> 2020-03-16  Rob Buis  <rbuis@igalia.com>
> 
>         Remove addHTTPOriginIfNeeded calls
>diff --git a/Source/WebCore/PAL/ChangeLog b/Source/WebCore/PAL/ChangeLog
>index dca58cb296b86ed0f4d1c4893c4b7b891b53c2af..6e7d9aa27389a9466020147a25ee844280e5f295 100644
>--- a/Source/WebCore/PAL/ChangeLog
>+++ b/Source/WebCore/PAL/ChangeLog
>@@ -1,3 +1,12 @@
>+2020-03-13  Sergio Villar Senin  <svillar@igalia.com>
>+
>+        [WebXR] IDLs, stubs and build configuration for WPE
>+        https://bugs.webkit.org/show_bug.cgi?id=208702
>+
>+        Reviewed by Dean Jackson.
>+
>+        * Configurations/FeatureDefines.xcconfig: Added ENABLE_WEBXR off by default.
>+
> 2020-03-15  Yusuke Suzuki  <ysuzuki@apple.com>
> 
>         Should not use variable-length-array (VLA)
>diff --git a/Source/WebKit/ChangeLog b/Source/WebKit/ChangeLog
>index 70ff6e0b9899349e3382eee781b396572e3da71e..3f3e406f6b5818ce337820437790d700cde07b9d 100644
>--- a/Source/WebKit/ChangeLog
>+++ b/Source/WebKit/ChangeLog
>@@ -1,3 +1,20 @@
>+2020-03-13  Sergio Villar Senin  <svillar@igalia.com>
>+
>+        [WebXR] IDLs, stubs and build configuration for WPE
>+        https://bugs.webkit.org/show_bug.cgi?id=208702
>+
>+        Reviewed by Dean Jackson.
>+
>+        Added WebXR to the list of experimental features.
>+
>+        * Configurations/FeatureDefines.xcconfig: Added ENABLE_WEBXR off by default.
>+        * Shared/WebPreferences.yaml: Added WebXR feature.
>+        * Shared/WebPreferencesDefaultValues.cpp:
>+        (WebKit::defaultWebXREnabled): Set WebXR to off by default unless HAVE_SYSTEM_FEATURE_FLAGS.
>+        * Shared/WebPreferencesDefaultValues.h:
>+        * WebProcess/InjectedBundle/InjectedBundle.cpp:
>+        (WebKit::InjectedBundle::overrideBoolPreferenceForTestRunner):
>+
> 2020-03-16  Rob Buis  <rbuis@igalia.com>
> 
>         Simplify ChromeClient.createWindow
>diff --git a/Source/WebKitLegacy/mac/ChangeLog b/Source/WebKitLegacy/mac/ChangeLog
>index f80267a590f3db013e5b4ef9b551589db773ebe1..654b4534a842fd0331a105d1898b340de0d08b4a 100644
>--- a/Source/WebKitLegacy/mac/ChangeLog
>+++ b/Source/WebKitLegacy/mac/ChangeLog
>@@ -1,3 +1,12 @@
>+2020-03-13  Sergio Villar Senin  <svillar@igalia.com>
>+
>+        [WebXR] IDLs, stubs and build configuration for WPE
>+        https://bugs.webkit.org/show_bug.cgi?id=208702
>+
>+        Reviewed by Dean Jackson.
>+
>+        * Configurations/FeatureDefines.xcconfig: Added ENABLE_WEBXR, off by default.
>+
> 2020-03-15  Yusuke Suzuki  <ysuzuki@apple.com>
> 
>         Should not use variable-length-array (VLA)
>diff --git a/Source/JavaScriptCore/Configurations/FeatureDefines.xcconfig b/Source/JavaScriptCore/Configurations/FeatureDefines.xcconfig
>index e6a30029a01df1802ebf72f58fa8411581e801b4..cfbb7295135f01b4c7476519d4687e6c6f1be345 100644
>--- a/Source/JavaScriptCore/Configurations/FeatureDefines.xcconfig
>+++ b/Source/JavaScriptCore/Configurations/FeatureDefines.xcconfig
>@@ -394,6 +394,8 @@ ENABLE_WEBGPU_appletvos = ENABLE_WEBGPU;
> ENABLE_WEBGPU_macosx = $(ENABLE_WEBGPU$(WK_MACOS_1014));
> ENABLE_WEBGPU_MACOS_SINCE_1014 = ENABLE_WEBGPU;
> 
>+ENABLE_WEBXR = ;
>+
> ENABLE_WEB_API_STATISTICS = ;
> 
> ENABLE_WEB_AUDIO = ENABLE_WEB_AUDIO;
>@@ -414,4 +416,4 @@ ENABLE_WIRELESS_PLAYBACK_TARGET = ENABLE_WIRELESS_PLAYBACK_TARGET;
> 
> ENABLE_XSLT = ENABLE_XSLT;
> 
>-FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCESSIBILITY_ISOLATED_TREE) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLE_PAY_SESSION_V9) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_CONIC_GRADIENTS) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_PAINTING_API) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CSS_TYPED_OM) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_C_LOOP) $(ENABLE_DARK_MODE_CSS) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FULLSCREEN_API) $(ENABLE_PICTURE_IN_PICTURE_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_GPU_PROCESS) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INSPECTOR_ALTERNATE_DISPATCHERS) $(ENABLE_INSPECTOR_TELEMETRY) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_MEMORY_SAMPLER) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NETWORK_CACHE_SPECULATIVE_REVALIDATION) $(ENABLE_NETWORK_CACHE_STALE_WHILE_REVALIDATE) $(ENABLE_NOTIFICATIONS) $(ENABLE_OFFSCREEN_CANVAS) $(ENABLE_OVERFLOW_SCROLLING_TOUCH) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESIZE_OBSERVER) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_LOAD_STATISTICS) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SANDBOX_EXTENSIONS) $(ENABLE_SERVER_PRECONNECT) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SHAREABLE_RESOURCE) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USERSELECT_ALL) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEBDRIVER_MOUSE_INTERACTIONS) $(ENABLE_WEBDRIVER_KEYBOARD_INTERACTIONS) $(ENABLE_WEBDRIVER_TOUCH_INTERACTIONS) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WEB_API_STATISTICS) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_CRYPTO) $(ENABLE_WEB_RTC) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>+FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCESSIBILITY_ISOLATED_TREE) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLE_PAY_SESSION_V9) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_CONIC_GRADIENTS) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_PAINTING_API) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CSS_TYPED_OM) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_C_LOOP) $(ENABLE_DARK_MODE_CSS) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FULLSCREEN_API) $(ENABLE_PICTURE_IN_PICTURE_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_GPU_PROCESS) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INSPECTOR_ALTERNATE_DISPATCHERS) $(ENABLE_INSPECTOR_TELEMETRY) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_MEMORY_SAMPLER) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NETWORK_CACHE_SPECULATIVE_REVALIDATION) $(ENABLE_NETWORK_CACHE_STALE_WHILE_REVALIDATE) $(ENABLE_NOTIFICATIONS) $(ENABLE_OFFSCREEN_CANVAS) $(ENABLE_OVERFLOW_SCROLLING_TOUCH) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESIZE_OBSERVER) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_LOAD_STATISTICS) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SANDBOX_EXTENSIONS) $(ENABLE_SERVER_PRECONNECT) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SHAREABLE_RESOURCE) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USERSELECT_ALL) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEBDRIVER_MOUSE_INTERACTIONS) $(ENABLE_WEBDRIVER_KEYBOARD_INTERACTIONS) $(ENABLE_WEBDRIVER_TOUCH_INTERACTIONS) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WEBXR) $(ENABLE_WEB_API_STATISTICS) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_CRYPTO) $(ENABLE_WEB_RTC) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>diff --git a/Source/WTF/wtf/Platform.h b/Source/WTF/wtf/Platform.h
>index dedfa14d5a5ddda84e335bfd485e755097faec57..6802cc8ccb15a84f11d0d3f077fce927b6440690 100644
>--- a/Source/WTF/wtf/Platform.h
>+++ b/Source/WTF/wtf/Platform.h
>@@ -180,6 +180,7 @@
> #if (USE_ANGLE && (USE_OPENGL || USE_OPENGL_ES || (defined(USE_EGL) && USE_EGL))) && !USE(TEXTURE_MAPPER)
> #error USE_ANGLE is incompatible with USE_OPENGL, USE_OPENGL_ES and USE_EGL
> #endif
>+
> #endif
> 
> #if USE(TEXTURE_MAPPER) && ENABLE(GRAPHICS_CONTEXT_GL) && !defined(USE_TEXTURE_MAPPER_GL)
>@@ -190,3 +191,4 @@
> #if PLATFORM(COCOA) && ENABLE(ACCESSIBILITY)
> #define USE_ACCESSIBILITY_CONTEXT_MENUS 1
> #endif
>+
>diff --git a/Source/WebCore/CMakeLists.txt b/Source/WebCore/CMakeLists.txt
>index 2efce0d3d9451c5140f7cfbe6223e2ff39287f53..1276fce1d7a4d2f0edbb226ad1773bb9f4422ad7 100644
>--- a/Source/WebCore/CMakeLists.txt
>+++ b/Source/WebCore/CMakeLists.txt
>@@ -64,6 +64,7 @@ set(WebCore_PRIVATE_INCLUDE_DIRECTORIES
>     "${WEBCORE_DIR}/Modules/webgpu/WHLSL"
>     "${WEBCORE_DIR}/Modules/webgpu/WHLSL/AST"
>     "${WEBCORE_DIR}/Modules/websockets"
>+    "${WEBCORE_DIR}/Modules/webxr"
>     "${WEBCORE_DIR}/accessibility"
>     "${WEBCORE_DIR}/accessibility/isolatedtree"
>     "${WEBCORE_DIR}/animation"
>@@ -141,7 +142,7 @@ set(WebCore_PRIVATE_INCLUDE_DIRECTORIES
>     "${WEBCORE_DIR}/platform/network"
>     "${WEBCORE_DIR}/platform/sql"
>     "${WEBCORE_DIR}/platform/text"
>-    "${WEBCORE_DIR}/platform/vr"
>+    "${WEBCORE_DIR}/platform/xr"
>     "${WEBCORE_DIR}/plugins"
>     "${WEBCORE_DIR}/rendering"
>     "${WEBCORE_DIR}/rendering/line"
>@@ -1179,6 +1180,42 @@ if (ENABLE_GAMEPAD)
>     )
> endif ()
> 
>+if (ENABLE_WEBGL)
>+    list(APPEND WebCore_NON_SVG_IDL_FILES
>+        Modules/webxr/NavigatorWebXR.idl
>+        Modules/webxr/WebXRBoundedReferenceSpace.idl
>+        Modules/webxr/WebXRFrame.idl
>+        Modules/webxr/WebXRInputSource.idl
>+        Modules/webxr/WebXRInputSourceArray.idl
>+        Modules/webxr/WebXRPose.idl
>+        Modules/webxr/WebXRReferenceSpace.idl
>+        Modules/webxr/WebXRRenderState.idl
>+        Modules/webxr/WebXRRigidTransform.idl
>+        Modules/webxr/WebXRSession.idl
>+        Modules/webxr/WebXRSpace.idl
>+        Modules/webxr/WebXRSystem.idl
>+        Modules/webxr/WebXRView.idl
>+        Modules/webxr/WebXRViewerPose.idl
>+        Modules/webxr/WebXRViewport.idl
>+        Modules/webxr/WebXRWebGLLayer.idl
>+        Modules/webxr/XREnvironmentBlendMode.idl
>+        Modules/webxr/XREye.idl
>+        Modules/webxr/XRFrameRequestCallback.idl
>+        Modules/webxr/XRHandedness.idl
>+        Modules/webxr/XRInputSourceEvent.idl
>+        Modules/webxr/XRInputSourcesChangeEvent.idl
>+        Modules/webxr/XRReferenceSpaceEvent.idl
>+        Modules/webxr/XRReferenceSpaceType.idl
>+        Modules/webxr/XRRenderStateInit.idl
>+        Modules/webxr/XRSessionEvent.idl
>+        Modules/webxr/XRSessionInit.idl
>+        Modules/webxr/XRSessionMode.idl
>+        Modules/webxr/XRTargetRayMode.idl
>+        Modules/webxr/XRVisibilityState.idl
>+        Modules/webxr/XRWebGLLayerInit.idl
>+    )
>+endif ()
>+
> set(WebCore_IDL_FILES
>     ${WebCore_NON_SVG_IDL_FILES}
>     ${WebCore_SVG_IDL_FILES}
>diff --git a/Source/WebCore/Configurations/FeatureDefines.xcconfig b/Source/WebCore/Configurations/FeatureDefines.xcconfig
>index e6a30029a01df1802ebf72f58fa8411581e801b4..cfbb7295135f01b4c7476519d4687e6c6f1be345 100644
>--- a/Source/WebCore/Configurations/FeatureDefines.xcconfig
>+++ b/Source/WebCore/Configurations/FeatureDefines.xcconfig
>@@ -394,6 +394,8 @@ ENABLE_WEBGPU_appletvos = ENABLE_WEBGPU;
> ENABLE_WEBGPU_macosx = $(ENABLE_WEBGPU$(WK_MACOS_1014));
> ENABLE_WEBGPU_MACOS_SINCE_1014 = ENABLE_WEBGPU;
> 
>+ENABLE_WEBXR = ;
>+
> ENABLE_WEB_API_STATISTICS = ;
> 
> ENABLE_WEB_AUDIO = ENABLE_WEB_AUDIO;
>@@ -414,4 +416,4 @@ ENABLE_WIRELESS_PLAYBACK_TARGET = ENABLE_WIRELESS_PLAYBACK_TARGET;
> 
> ENABLE_XSLT = ENABLE_XSLT;
> 
>-FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCESSIBILITY_ISOLATED_TREE) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLE_PAY_SESSION_V9) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_CONIC_GRADIENTS) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_PAINTING_API) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CSS_TYPED_OM) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_C_LOOP) $(ENABLE_DARK_MODE_CSS) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FULLSCREEN_API) $(ENABLE_PICTURE_IN_PICTURE_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_GPU_PROCESS) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INSPECTOR_ALTERNATE_DISPATCHERS) $(ENABLE_INSPECTOR_TELEMETRY) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_MEMORY_SAMPLER) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NETWORK_CACHE_SPECULATIVE_REVALIDATION) $(ENABLE_NETWORK_CACHE_STALE_WHILE_REVALIDATE) $(ENABLE_NOTIFICATIONS) $(ENABLE_OFFSCREEN_CANVAS) $(ENABLE_OVERFLOW_SCROLLING_TOUCH) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESIZE_OBSERVER) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_LOAD_STATISTICS) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SANDBOX_EXTENSIONS) $(ENABLE_SERVER_PRECONNECT) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SHAREABLE_RESOURCE) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USERSELECT_ALL) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEBDRIVER_MOUSE_INTERACTIONS) $(ENABLE_WEBDRIVER_KEYBOARD_INTERACTIONS) $(ENABLE_WEBDRIVER_TOUCH_INTERACTIONS) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WEB_API_STATISTICS) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_CRYPTO) $(ENABLE_WEB_RTC) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>+FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCESSIBILITY_ISOLATED_TREE) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLE_PAY_SESSION_V9) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_CONIC_GRADIENTS) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_PAINTING_API) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CSS_TYPED_OM) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_C_LOOP) $(ENABLE_DARK_MODE_CSS) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FULLSCREEN_API) $(ENABLE_PICTURE_IN_PICTURE_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_GPU_PROCESS) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INSPECTOR_ALTERNATE_DISPATCHERS) $(ENABLE_INSPECTOR_TELEMETRY) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_MEMORY_SAMPLER) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NETWORK_CACHE_SPECULATIVE_REVALIDATION) $(ENABLE_NETWORK_CACHE_STALE_WHILE_REVALIDATE) $(ENABLE_NOTIFICATIONS) $(ENABLE_OFFSCREEN_CANVAS) $(ENABLE_OVERFLOW_SCROLLING_TOUCH) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESIZE_OBSERVER) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_LOAD_STATISTICS) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SANDBOX_EXTENSIONS) $(ENABLE_SERVER_PRECONNECT) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SHAREABLE_RESOURCE) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USERSELECT_ALL) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEBDRIVER_MOUSE_INTERACTIONS) $(ENABLE_WEBDRIVER_KEYBOARD_INTERACTIONS) $(ENABLE_WEBDRIVER_TOUCH_INTERACTIONS) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WEBXR) $(ENABLE_WEB_API_STATISTICS) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_CRYPTO) $(ENABLE_WEB_RTC) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>diff --git a/Source/WebCore/DerivedSources.make b/Source/WebCore/DerivedSources.make
>index 4d9edaf1a66b6dad957150abc649d3eed21f7641..4e92568f0722916aea928586c64976328705fe95 100644
>--- a/Source/WebCore/DerivedSources.make
>+++ b/Source/WebCore/DerivedSources.make
>@@ -64,6 +64,7 @@ VPATH = \
>     $(WebCore)/Modules/webdriver \
>     $(WebCore)/Modules/webgpu \
>     $(WebCore)/Modules/websockets \
>+    $(WebCore)/Modules/webxr \
>     $(WebCore)/accessibility \
>     $(WebCore)/animation \
>     $(WebCore)/bindings/js \
>@@ -460,6 +461,37 @@ JS_BINDING_IDLS = \
>     $(WebCore)/Modules/webgpu/WorkerNavigatorGPU.idl \
>     $(WebCore)/Modules/websockets/CloseEvent.idl \
>     $(WebCore)/Modules/websockets/WebSocket.idl \
>+    $(WebCore)/Modules/webxr/NavigatorWebXR.idl \
>+    $(WebCore)/Modules/webxr/WebXRBoundedReferenceSpace.idl \
>+    $(WebCore)/Modules/webxr/WebXRFrame.idl \
>+    $(WebCore)/Modules/webxr/WebXRInputSourceArray.idl \
>+    $(WebCore)/Modules/webxr/WebXRInputSource.idl \
>+    $(WebCore)/Modules/webxr/WebXRPose.idl \
>+    $(WebCore)/Modules/webxr/WebXRReferenceSpace.idl \
>+    $(WebCore)/Modules/webxr/WebXRRenderState.idl \
>+    $(WebCore)/Modules/webxr/WebXRRigidTransform.idl \
>+    $(WebCore)/Modules/webxr/WebXRSession.idl \
>+    $(WebCore)/Modules/webxr/WebXRSpace.idl \
>+    $(WebCore)/Modules/webxr/WebXRSystem.idl \
>+    $(WebCore)/Modules/webxr/WebXRViewerPose.idl \
>+    $(WebCore)/Modules/webxr/WebXRView.idl \
>+    $(WebCore)/Modules/webxr/WebXRViewport.idl \
>+    $(WebCore)/Modules/webxr/WebXRWebGLLayer.idl \
>+    $(WebCore)/Modules/webxr/XREnvironmentBlendMode.idl \
>+    $(WebCore)/Modules/webxr/XREye.idl \
>+    $(WebCore)/Modules/webxr/XRFrameRequestCallback.idl \
>+    $(WebCore)/Modules/webxr/XRHandedness.idl \
>+    $(WebCore)/Modules/webxr/XRInputSourceEvent.idl \
>+    $(WebCore)/Modules/webxr/XRInputSourcesChangeEvent.idl \
>+    $(WebCore)/Modules/webxr/XRReferenceSpaceEvent.idl \
>+    $(WebCore)/Modules/webxr/XRReferenceSpaceType.idl \
>+    $(WebCore)/Modules/webxr/XRRenderStateInit.idl \
>+    $(WebCore)/Modules/webxr/XRSessionEvent.idl \
>+    $(WebCore)/Modules/webxr/XRSessionInit.idl \
>+    $(WebCore)/Modules/webxr/XRSessionMode.idl \
>+    $(WebCore)/Modules/webxr/XRTargetRayMode.idl \
>+    $(WebCore)/Modules/webxr/XRVisibilityState.idl \
>+    $(WebCore)/Modules/webxr/XRWebGLLayerInit.idl \
>     $(WebCore)/accessibility/AccessibilityRole.idl \
>     $(WebCore)/accessibility/AriaAttributes.idl \
>     $(WebCore)/animation/Animatable.idl \
>diff --git a/Source/WebCore/Modules/webxr/NavigatorWebXR.cpp b/Source/WebCore/Modules/webxr/NavigatorWebXR.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..06a4c5d783890045c13b719d39fb1d2bf2381257
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/NavigatorWebXR.cpp
>@@ -0,0 +1,57 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include "config.h"
>+#include "NavigatorWebXR.h"
>+
>+#if ENABLE(WEBXR)
>+
>+#include "Navigator.h"
>+#include "WebXRSystem.h"
>+
>+namespace WebCore {
>+
>+WebXRSystem& NavigatorWebXR::xr(ScriptExecutionContext& scriptExecutionContext, Navigator& navigatorObject)
>+{
>+    auto& navigator = NavigatorWebXR::from(navigatorObject);
>+    if (!navigator.m_xr)
>+        navigator.m_xr = WebXRSystem::create(scriptExecutionContext);
>+    return *navigator.m_xr;
>+}
>+
>+NavigatorWebXR& NavigatorWebXR::from(Navigator& navigator)
>+{
>+    auto* supplement = static_cast<NavigatorWebXR*>(Supplement<Navigator>::from(&navigator, "NavigatorWebXR"));
>+    if (!supplement) {
>+        auto newSupplement = makeUnique<NavigatorWebXR>();
>+        supplement = newSupplement.get();
>+        provideTo(&navigator, "NavigatorWebXR", WTFMove(newSupplement));
>+    }
>+    return *supplement;
>+}
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/NavigatorWebXR.h b/Source/WebCore/Modules/webxr/NavigatorWebXR.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..ff34e4e59f39c89db2a92a4160b8803ee07f42db
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/NavigatorWebXR.h
>@@ -0,0 +1,52 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBXR)
>+
>+#include "Supplementable.h"
>+#include <wtf/RefPtr.h>
>+
>+namespace WebCore {
>+
>+class Navigator;
>+class ScriptExecutionContext;
>+class WebXRSystem;
>+
>+class NavigatorWebXR final : public Supplement<Navigator> {
>+    WTF_MAKE_FAST_ALLOCATED;
>+public:
>+    static WebXRSystem& xr(ScriptExecutionContext&, Navigator&);
>+
>+private:
>+    static NavigatorWebXR& from(Navigator&);
>+
>+    RefPtr<WebXRSystem> m_xr;
>+};
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/NavigatorWebXR.idl b/Source/WebCore/Modules/webxr/NavigatorWebXR.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..d9bbf5dd1399434a3c6366d50def067536e8d13a
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/NavigatorWebXR.idl
>@@ -0,0 +1,31 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBXR
>+] partial interface Navigator {
>+    [SecureContext, SameObject, CallWith=ScriptExecutionContext] readonly attribute WebXRSystem xr;
>+};
>diff --git a/Source/WebCore/Modules/webxr/WebXRBoundedReferenceSpace.cpp b/Source/WebCore/Modules/webxr/WebXRBoundedReferenceSpace.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..8bdeda35230eb730d7e56bde5bd52aa2b3261f3d
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRBoundedReferenceSpace.cpp
>@@ -0,0 +1,40 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include "config.h"
>+#include "WebXRBoundedReferenceSpace.h"
>+
>+#if ENABLE(WEBXR)
>+
>+namespace WebCore {
>+
>+const Vector<Ref<DOMPointReadOnly>>& WebXRBoundedReferenceSpace::boundsGeometry() const
>+{
>+    return m_boundsGeometry;
>+}
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/WebXRBoundedReferenceSpace.h b/Source/WebCore/Modules/webxr/WebXRBoundedReferenceSpace.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..9b3b74f3e2ad43785cee036db8e32ae62d9d48d6
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRBoundedReferenceSpace.h
>@@ -0,0 +1,50 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#include "WebXRReferenceSpace.h"
>+#include <wtf/Ref.h>
>+#include <wtf/Vector.h>
>+
>+#if ENABLE(WEBXR)
>+
>+namespace WebCore {
>+
>+class DOMPointReadOnly;
>+
>+class WebXRBoundedReferenceSpace : public WebXRReferenceSpace {
>+public:
>+    virtual ~WebXRBoundedReferenceSpace();
>+
>+    const Vector<Ref<DOMPointReadOnly>>& boundsGeometry() const;
>+
>+private:
>+    Vector<Ref<DOMPointReadOnly>> m_boundsGeometry;
>+};
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/WebXRBoundedReferenceSpace.idl b/Source/WebCore/Modules/webxr/WebXRBoundedReferenceSpace.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..d5b88337423d06aa9fa4d5541b6c5104f0e47e4d
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRBoundedReferenceSpace.idl
>@@ -0,0 +1,34 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBXR,
>+    SecureContext,
>+    Exposed=Window,
>+    InterfaceName=XRBoundedReferenceSpace
>+] interface WebXRBoundedReferenceSpace : WebXRReferenceSpace {
>+    readonly attribute FrozenArray<DOMPointReadOnly> boundsGeometry;
>+};
>diff --git a/Source/WebCore/Modules/webxr/WebXRFrame.cpp b/Source/WebCore/Modules/webxr/WebXRFrame.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..935dc127c9d07a7c8d2384154587d5135887ae1a
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRFrame.cpp
>@@ -0,0 +1,68 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include "config.h"
>+#include "WebXRFrame.h"
>+
>+#if ENABLE(WEBXR)
>+
>+#include "WebXRSession.h"
>+#include "WebXRViewerPose.h"
>+#include <wtf/IsoMallocInlines.h>
>+
>+namespace WebCore {
>+
>+WTF_MAKE_ISO_ALLOCATED_IMPL(WebXRFrame);
>+
>+Ref<WebXRFrame> WebXRFrame::create(Ref<WebXRSession>&& session)
>+{
>+    return adoptRef(*new WebXRFrame(WTFMove(session)));
>+}
>+
>+WebXRFrame::WebXRFrame(Ref<WebXRSession>&& session)
>+    : m_session(WTFMove(session))
>+{
>+}
>+
>+WebXRFrame::~WebXRFrame() = default;
>+
>+const WebXRSession& WebXRFrame::session() const
>+{
>+    return m_session;
>+}
>+
>+RefPtr<WebXRViewerPose> WebXRFrame::getViewerPose(const WebXRReferenceSpace&)
>+{
>+    return { };
>+}
>+
>+RefPtr<WebXRPose> WebXRFrame::getPose(const WebXRSpace&, const WebXRSpace&)
>+{
>+    return { };
>+}
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/WebXRFrame.h b/Source/WebCore/Modules/webxr/WebXRFrame.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..808a6764f0d2c5ae61e4d658c28250579fe5b627
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRFrame.h
>@@ -0,0 +1,62 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBXR)
>+
>+#include <wtf/IsoMalloc.h>
>+#include <wtf/Ref.h>
>+#include <wtf/RefCounted.h>
>+#include <wtf/RefPtr.h>
>+
>+namespace WebCore {
>+
>+class WebXRPose;
>+class WebXRReferenceSpace;
>+class WebXRSession;
>+class WebXRSpace;
>+class WebXRViewerPose;
>+
>+class WebXRFrame : public RefCounted<WebXRFrame> {
>+    WTF_MAKE_ISO_ALLOCATED(WebXRFrame);
>+public:
>+    static Ref<WebXRFrame> create(Ref<WebXRSession>&&);
>+    ~WebXRFrame();
>+
>+    const WebXRSession& session() const;
>+
>+    RefPtr<WebXRViewerPose> getViewerPose(const WebXRReferenceSpace&);
>+    RefPtr<WebXRPose> getPose(const WebXRSpace&, const WebXRSpace&);
>+
>+private:
>+    WebXRFrame(Ref<WebXRSession>&&);
>+
>+    Ref<WebXRSession> m_session;
>+};
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/WebXRFrame.idl b/Source/WebCore/Modules/webxr/WebXRFrame.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..21fcf3cfe4d9c75fd7f468e497db8e8007b8adf2
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRFrame.idl
>@@ -0,0 +1,38 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBXR,
>+    SecureContext,
>+    Exposed=Window,
>+    ImplementationLacksVTable,
>+    InterfaceName=XRFrame
>+] interface WebXRFrame {
>+    [SameObject] readonly attribute WebXRSession session;
>+
>+    WebXRViewerPose? getViewerPose(WebXRReferenceSpace referenceSpace);
>+    WebXRPose? getPose(WebXRSpace space, WebXRSpace baseSpace);
>+};
>diff --git a/Source/WebCore/Modules/webxr/WebXRInputSource.cpp b/Source/WebCore/Modules/webxr/WebXRInputSource.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..f3076751198dbbc376cb9719b8a87b12c62018dd
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRInputSource.cpp
>@@ -0,0 +1,79 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include "config.h"
>+#include "WebXRInputSource.h"
>+
>+#if ENABLE(WEBXR)
>+
>+#include "WebXRSpace.h"
>+#include <wtf/IsoMallocInlines.h>
>+
>+namespace WebCore {
>+
>+WTF_MAKE_ISO_ALLOCATED_IMPL(WebXRInputSource);
>+
>+Ref<WebXRInputSource> WebXRInputSource::create(Ref<WebXRSpace>&& targetRaySpace)
>+{
>+    return adoptRef(*new WebXRInputSource(WTFMove(targetRaySpace)));
>+}
>+
>+WebXRInputSource::WebXRInputSource(Ref<WebXRSpace>&& targetRaySpace)
>+    : m_handedness(XRHandedness::None)
>+    , m_targetRayMode(XRTargetRayMode::Gaze)
>+    , m_targetRaySpace(WTFMove(targetRaySpace))
>+{
>+}
>+
>+WebXRInputSource::~WebXRInputSource() = default;
>+
>+XRHandedness WebXRInputSource::handedness() const
>+{
>+    return m_handedness;
>+}
>+
>+XRTargetRayMode WebXRInputSource::targetRayMode() const
>+{
>+    return m_targetRayMode;
>+}
>+
>+const WebXRSpace& WebXRInputSource::targetRaySpace() const
>+{
>+    return m_targetRaySpace;
>+}
>+
>+RefPtr<WebXRSpace> WebXRInputSource::gripSpace() const
>+{
>+    return { };
>+}
>+
>+const Vector<String>& WebXRInputSource::profiles() const
>+{
>+    return m_profiles;
>+}
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/WebXRInputSource.h b/Source/WebCore/Modules/webxr/WebXRInputSource.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..68c29ab1cdb906dbe14bb9492ab2fd88b41d4112
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRInputSource.h
>@@ -0,0 +1,66 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBXR)
>+
>+#include "XRHandedness.h"
>+#include "XRTargetRayMode.h"
>+#include <wtf/IsoMalloc.h>
>+#include <wtf/Ref.h>
>+#include <wtf/RefCounted.h>
>+#include <wtf/RefPtr.h>
>+#include <wtf/Vector.h>
>+#include <wtf/text/WTFString.h>
>+
>+namespace WebCore {
>+
>+class WebXRSpace;
>+
>+class WebXRInputSource : public RefCounted<WebXRInputSource> {
>+    WTF_MAKE_ISO_ALLOCATED(WebXRInputSource);
>+public:
>+    static Ref<WebXRInputSource> create(Ref<WebXRSpace>&&);
>+    ~WebXRInputSource();
>+
>+    XRHandedness handedness() const;
>+    XRTargetRayMode targetRayMode() const;
>+    const WebXRSpace& targetRaySpace() const;
>+    RefPtr<WebXRSpace> gripSpace() const;
>+    const Vector<String>& profiles() const;
>+
>+private:
>+    WebXRInputSource(Ref<WebXRSpace>&&);
>+
>+    XRHandedness m_handedness;
>+    XRTargetRayMode m_targetRayMode;
>+    Ref<WebXRSpace> m_targetRaySpace;
>+    Vector<String> m_profiles;
>+};
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/WebXRInputSource.idl b/Source/WebCore/Modules/webxr/WebXRInputSource.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..0459f3fe4707521137bf53f1a344eddd98ebd369
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRInputSource.idl
>@@ -0,0 +1,39 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBXR,
>+    SecureContext,
>+    Exposed=Window,
>+    ImplementationLacksVTable,
>+    InterfaceName=XRInputSource
>+] interface WebXRInputSource {
>+    readonly attribute XRHandedness handedness;
>+    readonly attribute XRTargetRayMode targetRayMode ;
>+    [SameObject] readonly attribute WebXRSpace targetRaySpace;
>+    [SameObject] readonly attribute WebXRSpace? gripSpace ;
>+    [SameObject] readonly attribute FrozenArray<DOMString> profiles;
>+};
>diff --git a/Source/WebCore/Modules/webxr/WebXRInputSourceArray.cpp b/Source/WebCore/Modules/webxr/WebXRInputSourceArray.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..c4c085532bcd9aac2738090bfa3fddfea43355d3
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRInputSourceArray.cpp
>@@ -0,0 +1,50 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include "config.h"
>+#include "WebXRInputSourceArray.h"
>+
>+#if ENABLE(WEBXR)
>+
>+#include <wtf/IsoMallocInlines.h>
>+
>+namespace WebCore {
>+
>+WTF_MAKE_ISO_ALLOCATED_IMPL(WebXRInputSourceArray);
>+
>+unsigned WebXRInputSourceArray::length() const
>+{
>+    return 0;
>+}
>+
>+WebXRInputSource* WebXRInputSourceArray::item(unsigned) const
>+{
>+    return nullptr;
>+}
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>+
>diff --git a/Source/WebCore/Modules/webxr/WebXRInputSourceArray.h b/Source/WebCore/Modules/webxr/WebXRInputSourceArray.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..f421f029e64cb08a2bb9b6a65685da0d5987d025
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRInputSourceArray.h
>@@ -0,0 +1,46 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBXR)
>+
>+#include <wtf/IsoMalloc.h>
>+#include <wtf/RefCounted.h>
>+
>+namespace WebCore {
>+
>+class WebXRInputSource;
>+
>+class WebXRInputSourceArray : public RefCounted<WebXRInputSourceArray> {
>+    WTF_MAKE_ISO_ALLOCATED(WebXRInputSourceArray);
>+public:
>+    unsigned length() const;
>+    WebXRInputSource* item(unsigned) const;
>+};
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/WebXRInputSourceArray.idl b/Source/WebCore/Modules/webxr/WebXRInputSourceArray.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..fcad84ac055fe6051019ae7c772c042c9e02c717
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRInputSourceArray.idl
>@@ -0,0 +1,37 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBXR,
>+    SecureContext,
>+    Exposed=Window,
>+    ImplementationLacksVTable,
>+    InterfaceName=XRInputSourceArray
>+] interface WebXRInputSourceArray {
>+    iterable<WebXRInputSource>;
>+    readonly attribute unsigned long length;
>+    getter WebXRInputSource(unsigned long index);
>+};
>diff --git a/Source/WebCore/Modules/webxr/WebXRPose.cpp b/Source/WebCore/Modules/webxr/WebXRPose.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..1c5f80a54455cbe8fcb072d547b3196a98878658
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRPose.cpp
>@@ -0,0 +1,62 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include "config.h"
>+#include "WebXRPose.h"
>+
>+#if ENABLE(WEBXR)
>+
>+#include "WebXRRigidTransform.h"
>+#include <wtf/IsoMallocInlines.h>
>+
>+namespace WebCore {
>+
>+WTF_MAKE_ISO_ALLOCATED_IMPL(WebXRPose);
>+
>+Ref<WebXRPose> WebXRPose::create()
>+{
>+    return adoptRef(*new WebXRPose);
>+}
>+
>+WebXRPose::WebXRPose()
>+    : m_transform(WebXRRigidTransform::create())
>+{
>+}
>+
>+WebXRPose::~WebXRPose() = default;
>+
>+const WebXRRigidTransform& WebXRPose::transform() const
>+{
>+    return m_transform;
>+}
>+
>+bool WebXRPose::emulatedPosition() const
>+{
>+    return m_emulatedPosition;
>+}
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/WebXRPose.h b/Source/WebCore/Modules/webxr/WebXRPose.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..29919d24c3953aa39a2c4894bc7cce5c29c17e6a
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRPose.h
>@@ -0,0 +1,56 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBXR)
>+
>+#include <wtf/IsoMalloc.h>
>+#include <wtf/Ref.h>
>+#include <wtf/RefCounted.h>
>+
>+namespace WebCore {
>+
>+class WebXRRigidTransform;
>+
>+class WebXRPose : public RefCounted<WebXRPose> {
>+    WTF_MAKE_ISO_ALLOCATED(WebXRPose);
>+public:
>+    static Ref<WebXRPose> create();
>+    ~WebXRPose();
>+
>+    const WebXRRigidTransform& transform() const;
>+    bool emulatedPosition() const;
>+
>+protected:
>+    WebXRPose();
>+
>+    Ref<WebXRRigidTransform> m_transform;
>+    bool m_emulatedPosition { false };
>+};
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/WebXRPose.idl b/Source/WebCore/Modules/webxr/WebXRPose.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..4c4e9dadc8ea0af31518694193b9249644788026
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRPose.idl
>@@ -0,0 +1,36 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBXR,
>+    SecureContext,
>+    Exposed=Window,
>+    ImplementationLacksVTable,
>+    InterfaceName=XRPose
>+] interface WebXRPose {
>+    [SameObject] readonly attribute WebXRRigidTransform transform;
>+    readonly attribute boolean emulatedPosition;
>+};
>diff --git a/Source/WebCore/Modules/webxr/WebXRReferenceSpace.cpp b/Source/WebCore/Modules/webxr/WebXRReferenceSpace.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..b33bf708cc427c81906b03e58ecd928a30ff0cd9
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRReferenceSpace.cpp
>@@ -0,0 +1,47 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include "config.h"
>+#include "WebXRReferenceSpace.h"
>+
>+#if ENABLE(WEBXR)
>+
>+namespace WebCore {
>+
>+WebXRReferenceSpace::WebXRReferenceSpace(ScriptExecutionContext& context)
>+    : WebXRSpace(context)
>+{
>+}
>+
>+WebXRReferenceSpace::~WebXRReferenceSpace() = default;
>+
>+Ref<WebXRReferenceSpace> WebXRReferenceSpace::getOffsetReferenceSpace(const WebXRRigidTransform&)
>+{
>+    return adoptRef(*new WebXRReferenceSpace(*scriptExecutionContext()));
>+}
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/WebXRReferenceSpace.h b/Source/WebCore/Modules/webxr/WebXRReferenceSpace.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..26bb48cbf69038fea2bd314826396b93d21353cd
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRReferenceSpace.h
>@@ -0,0 +1,50 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBXR)
>+
>+#include "WebXRSpace.h"
>+
>+#include <wtf/Ref.h>
>+
>+namespace WebCore {
>+
>+class WebXRRigidTransform;
>+
>+class WebXRReferenceSpace : public WebXRSpace {
>+public:
>+    virtual ~WebXRReferenceSpace();
>+
>+    Ref<WebXRReferenceSpace> getOffsetReferenceSpace(const WebXRRigidTransform&);
>+
>+private:
>+    WebXRReferenceSpace(ScriptExecutionContext&);
>+};
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/WebXRReferenceSpace.idl b/Source/WebCore/Modules/webxr/WebXRReferenceSpace.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..283507f445a52fe2e171966f5073bc13b49fc53b
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRReferenceSpace.idl
>@@ -0,0 +1,38 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBXR,
>+    SecureContext,
>+    Exposed=Window,
>+    JSGenerateToJSObject,
>+    JSGenerateToNativeObject,
>+    InterfaceName=XRReferenceSpace
>+] interface WebXRReferenceSpace : WebXRSpace {
>+    [NewObject] WebXRReferenceSpace getOffsetReferenceSpace(WebXRRigidTransform originOffset);
>+
>+    attribute EventHandler onreset;
>+};
>diff --git a/Source/WebCore/Modules/webxr/WebXRRenderState.cpp b/Source/WebCore/Modules/webxr/WebXRRenderState.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..06789f819271e91565269da3f3b961d33d9976ae
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRRenderState.cpp
>@@ -0,0 +1,95 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include "config.h"
>+#include "WebXRRenderState.h"
>+
>+#if ENABLE(WEBXR)
>+
>+#include "WebXRWebGLLayer.h"
>+#include "XRRenderStateInit.h"
>+#include <wtf/IsoMallocInlines.h>
>+#include <wtf/MathExtras.h>
>+
>+namespace WebCore {
>+
>+WTF_MAKE_ISO_ALLOCATED_IMPL(WebXRRenderState);
>+
>+Ref<WebXRRenderState> WebXRRenderState::create(const WebXRSession& session)
>+{
>+    // When an XRRenderState object is created for an XRSession session, the user agent MUST initialize the render state by running the following steps:
>+    //   1. Let state be the newly created XRRenderState object.
>+
>+    //   2. Initialize stateâs depthNear to 0.1.
>+    //   3. Initialize stateâs depthFar to 1000.0.
>+    // (Default-initialized in the XRRenderState class definition.)
>+
>+    //   4. If session is an immersive session, initialize stateâs inlineVerticalFieldOfView to null.
>+    //   5. Else initialize stateâs inlineVerticalFieldOfView to PI * 0.5.
>+    // FIXME: "immersive session" support
>+    UNUSED_PARAM(session);
>+    Optional<double> inlineVerticalFieldOfView { piOverTwoDouble };
>+
>+    //   6. Initialize stateâs baseLayer to null.
>+    //   7. Initialize stateâs outputContext to null.
>+    // (Initialized to null by default.)
>+
>+    return adoptRef(*new WebXRRenderState(WTFMove(inlineVerticalFieldOfView)));
>+}
>+
>+WebXRRenderState::WebXRRenderState(Optional<double>&& inlineVerticalFieldOfView)
>+    : m_inlineVerticalFieldOfView(WTFMove(inlineVerticalFieldOfView))
>+{
>+}
>+
>+WebXRRenderState::WebXRRenderState(const XRRenderStateInit&)
>+{
>+}
>+
>+WebXRRenderState::~WebXRRenderState() = default;
>+
>+double WebXRRenderState::depthNear() const
>+{
>+    return m_depth.near;
>+}
>+
>+double WebXRRenderState::depthFar() const
>+{
>+    return m_depth.far;
>+}
>+
>+Optional<double> WebXRRenderState::inlineVerticalFieldOfView() const
>+{
>+    return m_inlineVerticalFieldOfView;
>+}
>+
>+RefPtr<WebXRWebGLLayer> WebXRRenderState::baseLayer() const
>+{
>+    return m_baseLayer;
>+}
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/WebXRRenderState.h b/Source/WebCore/Modules/webxr/WebXRRenderState.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..3f292ac1d681a469876018189a87a96f1edbac7d
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRRenderState.h
>@@ -0,0 +1,67 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBXR)
>+
>+#include <wtf/IsoMalloc.h>
>+#include <wtf/Optional.h>
>+#include <wtf/Ref.h>
>+#include <wtf/RefCounted.h>
>+#include <wtf/RefPtr.h>
>+
>+namespace WebCore {
>+
>+class WebXRWebGLLayer;
>+struct XRRenderStateInit;
>+class WebXRSession;
>+
>+class WebXRRenderState : public RefCounted<WebXRRenderState> {
>+    WTF_MAKE_ISO_ALLOCATED(WebXRRenderState);
>+public:
>+    static Ref<WebXRRenderState> create(const WebXRSession&);
>+    ~WebXRRenderState();
>+
>+    double depthNear() const;
>+    double depthFar() const;
>+    Optional<double> inlineVerticalFieldOfView() const;
>+    RefPtr<WebXRWebGLLayer> baseLayer() const;
>+
>+private:
>+    WebXRRenderState(Optional<double>&&);
>+    WebXRRenderState(const XRRenderStateInit&);
>+
>+    struct {
>+        double near { 0.1 };
>+        double far { 1000 };
>+    } m_depth;
>+    Optional<double> m_inlineVerticalFieldOfView;
>+    RefPtr<WebXRWebGLLayer> m_baseLayer;
>+};
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/WebXRRenderState.idl b/Source/WebCore/Modules/webxr/WebXRRenderState.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..ae1ace6552c349e84a22a256cd60dc2cc3ca0335
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRRenderState.idl
>@@ -0,0 +1,38 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBXR,
>+    SecureContext,
>+    Exposed=Window,
>+    ImplementationLacksVTable,
>+    InterfaceName=XRRenderState
>+] interface WebXRRenderState {
>+    readonly attribute double depthNear;
>+    readonly attribute double depthFar;
>+    readonly attribute double? inlineVerticalFieldOfView;
>+    readonly attribute WebXRWebGLLayer? baseLayer;
>+};
>diff --git a/Source/WebCore/Modules/webxr/WebXRRigidTransform.cpp b/Source/WebCore/Modules/webxr/WebXRRigidTransform.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..d3fdcfb90e725b179780054ba6e7ba5464ff989d
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRRigidTransform.cpp
>@@ -0,0 +1,114 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include "config.h"
>+#include "WebXRRigidTransform.h"
>+
>+#if ENABLE(WEBXR)
>+
>+#include "DOMPointReadOnly.h"
>+#include "TransformationMatrix.h"
>+#include <JavaScriptCore/TypedArrayInlines.h>
>+#include <wtf/IsoMallocInlines.h>
>+
>+namespace WebCore {
>+
>+WTF_MAKE_ISO_ALLOCATED_IMPL(WebXRRigidTransform);
>+
>+Ref<WebXRRigidTransform> WebXRRigidTransform::create()
>+{
>+    return adoptRef(*new WebXRRigidTransform({ }, { }));
>+}
>+
>+ExceptionOr<Ref<WebXRRigidTransform>> WebXRRigidTransform::create(const DOMPointInit& position, const DOMPointInit& orientation)
>+{
>+    // The XRRigidTransform(position, orientation) constructor MUST perform the following steps when invoked:
>+    //   1. Let transform be a new XRRigidTransform.
>+
>+    //   2. If position is not a DOMPointInit initialize transformâs position to { x: 0.0, y: 0.0, z: 0.0, w: 1.0 }.
>+    //   3. If positionâs w value is not 1.0, throw a TypeError.
>+    //   4. Else initialize transformâs positionâs x value to positionâs x dictionary member, y value to positionâs y dictionary member, z value to positionâs z dictionary member and w to 1.0.
>+    if (position.w != 1.0)
>+        return Exception { TypeError };
>+    DOMPointInit positionInit { position.x, position.y, position.z, 1 };
>+
>+    //   5. If orientation is not a DOMPointInit initialize transformâs orientation to { x: 0.0, y: 0.0, z: 0.0, w: 1.0 }.
>+    //   6. Else initialize transformâs orientationâs x value to orientationâs x dictionary member, y value to orientationâs y dictionary member, z value to orientationâs z dictionary member and w value to orientationâs w dictionary member.
>+    //   7. Normalize x, y, z, and w components of transformâs orientation.
>+    DOMPointInit orientationInit { orientation.x, orientation.y, orientation.z, orientation.w };
>+    {
>+        double length = std::sqrt(orientationInit.x * orientationInit.x + orientationInit.y * orientationInit.y
>+            + orientationInit.z * orientationInit.z + orientationInit.w * orientationInit.w);
>+        if (WTF::areEssentiallyEqual<double>(length, 0))
>+            return Exception { InvalidStateError };
>+
>+        orientationInit= {
>+            orientationInit.x / length, orientationInit.y / length,
>+            orientationInit.z / length, orientationInit.w / length,
>+        };
>+    }
>+
>+    //   8. Return transform.
>+    return adoptRef(*new WebXRRigidTransform(positionInit, orientationInit));
>+}
>+
>+WebXRRigidTransform::WebXRRigidTransform(const DOMPointInit& position, const DOMPointInit& orientation)
>+    : m_position(DOMPointReadOnly::create(position))
>+    , m_orientation(DOMPointReadOnly::create(orientation))
>+{
>+    // FIXME: implement properly, per spec.
>+    TransformationMatrix matrix;
>+    auto matrixData = matrix.toColumnMajorFloatArray();
>+    m_matrix = Float32Array::create(matrixData.data(), matrixData.size());
>+}
>+
>+WebXRRigidTransform::~WebXRRigidTransform() = default;
>+
>+const DOMPointReadOnly& WebXRRigidTransform::position() const
>+{
>+    return m_position;
>+}
>+
>+const DOMPointReadOnly& WebXRRigidTransform::orientation() const
>+{
>+    return m_orientation;
>+}
>+
>+Ref<Float32Array>  WebXRRigidTransform::matrix() const
>+{
>+    auto matrix = Float32Array::create(16);
>+    matrix->zeroFill();
>+    return matrix;
>+}
>+
>+Ref<WebXRRigidTransform> WebXRRigidTransform::inverse() const
>+{
>+    // FIXME: implement properly.
>+    return WebXRRigidTransform::create();
>+}
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/WebXRRigidTransform.h b/Source/WebCore/Modules/webxr/WebXRRigidTransform.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..2f7cc1e7ab718d04f120168843bbb46f1f845415
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRRigidTransform.h
>@@ -0,0 +1,62 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBXR)
>+
>+#include "ExceptionOr.h"
>+#include <JavaScriptCore/Float32Array.h>
>+#include <wtf/IsoMalloc.h>
>+#include <wtf/RefCounted.h>
>+
>+namespace WebCore {
>+
>+struct DOMPointInit;
>+class DOMPointReadOnly;
>+
>+class WebXRRigidTransform : public RefCounted<WebXRRigidTransform> {
>+    WTF_MAKE_ISO_ALLOCATED(WebXRRigidTransform);
>+public:
>+    static Ref<WebXRRigidTransform> create();
>+    static ExceptionOr<Ref<WebXRRigidTransform>> create(const DOMPointInit&, const DOMPointInit&);
>+    ~WebXRRigidTransform();
>+
>+    const DOMPointReadOnly& position() const;
>+    const DOMPointReadOnly& orientation() const;
>+    Ref<Float32Array> matrix() const;
>+    Ref<WebXRRigidTransform> inverse() const;
>+
>+private:
>+    WebXRRigidTransform(const DOMPointInit&, const DOMPointInit&);
>+
>+    Ref<DOMPointReadOnly> m_position;
>+    Ref<DOMPointReadOnly> m_orientation;
>+    RefPtr<Float32Array> m_matrix;
>+};
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/WebXRRigidTransform.idl b/Source/WebCore/Modules/webxr/WebXRRigidTransform.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..e00cad7f2e073341ee56353e7109bbe2f1680523
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRRigidTransform.idl
>@@ -0,0 +1,40 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBXR,
>+    SecureContext,
>+    Exposed=Window,
>+    Constructor(optional DOMPointInit position, optional DOMPointInit orientation),
>+    ConstructorMayThrowException,
>+    ImplementationLacksVTable,
>+    InterfaceName=XRRigidTransform
>+] interface WebXRRigidTransform {
>+    [SameObject] readonly attribute DOMPointReadOnly position;
>+    [SameObject] readonly attribute DOMPointReadOnly orientation;
>+    readonly attribute Float32Array matrix;
>+    [SameObject] readonly attribute WebXRRigidTransform inverse;
>+};
>diff --git a/Source/WebCore/Modules/webxr/WebXRSession.cpp b/Source/WebCore/Modules/webxr/WebXRSession.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..ed3562f2e3f6c8d88943b09138f7668702157a2f
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRSession.cpp
>@@ -0,0 +1,91 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include "config.h"
>+#include "WebXRSession.h"
>+
>+#if ENABLE(WEBXR)
>+
>+#include <wtf/IsoMallocInlines.h>
>+
>+namespace WebCore {
>+
>+WTF_MAKE_ISO_ALLOCATED_IMPL(WebXRSession);
>+
>+WebXRSession::~WebXRSession() = default;
>+
>+XREnvironmentBlendMode WebXRSession::environmentBlendMode() const
>+{
>+    return m_environmentBlendMode;
>+}
>+
>+XRVisibilityState WebXRSession::visibilityState() const
>+{
>+    return m_visibilityState;
>+}
>+
>+const WebXRRenderState& WebXRSession::renderState() const
>+{
>+    return *m_renderState;
>+}
>+
>+const WebXRInputSourceArray& WebXRSession::inputSources() const
>+{
>+    return *m_inputSources;
>+}
>+
>+void WebXRSession::updateRenderState(const XRRenderStateInit&)
>+{
>+}
>+
>+void WebXRSession::requestReferenceSpace(const XRReferenceSpaceType&, RequestReferenceSpacePromise&&)
>+{
>+}
>+
>+int WebXRSession::requestAnimationFrame(Ref<XRFrameRequestCallback>&&)
>+{
>+    return 0;
>+}
>+
>+void WebXRSession::cancelAnimationFrame(int)
>+{
>+}
>+
>+void WebXRSession::end(EndPromise&&)
>+{
>+}
>+
>+const char* WebXRSession::activeDOMObjectName() const
>+{
>+    return "XRSession";
>+}
>+
>+void WebXRSession::stop()
>+{
>+}
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/WebXRSession.h b/Source/WebCore/Modules/webxr/WebXRSession.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..78c21ca9a9374fe8db1564fe1a68540a9e1469f9
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRSession.h
>@@ -0,0 +1,96 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBXR)
>+
>+#include "ActiveDOMObject.h"
>+#include "EventTarget.h"
>+#include "JSDOMPromiseDeferred.h"
>+#include "WebXRInputSourceArray.h"
>+#include "WebXRRenderState.h"
>+#include "WebXRSpace.h"
>+#include "XREnvironmentBlendMode.h"
>+#include "XRReferenceSpaceType.h"
>+#include "XRVisibilityState.h"
>+#include <wtf/Ref.h>
>+#include <wtf/RefCounted.h>
>+#include <wtf/RefPtr.h>
>+#include <wtf/Vector.h>
>+
>+namespace WebCore {
>+
>+class XRFrameRequestCallback;
>+class WebXRReferenceSpace;
>+struct XRRenderStateInit;
>+
>+class WebXRSession final : public RefCounted<WebXRSession>, public EventTargetWithInlineData, public ActiveDOMObject {
>+    WTF_MAKE_ISO_ALLOCATED(WebXRSession);
>+public:
>+    using RequestReferenceSpacePromise = DOMPromiseDeferred<IDLInterface<WebXRReferenceSpace>>;
>+    using EndPromise = DOMPromiseDeferred<void>;
>+
>+    virtual ~WebXRSession();
>+
>+    using RefCounted<WebXRSession>::ref;
>+    using RefCounted<WebXRSession>::deref;
>+
>+    XREnvironmentBlendMode environmentBlendMode() const;
>+    XRVisibilityState visibilityState() const;
>+    const WebXRRenderState& renderState() const;
>+    const WebXRInputSourceArray& inputSources() const;
>+
>+    void updateRenderState(const XRRenderStateInit&);
>+    void requestReferenceSpace(const XRReferenceSpaceType&, RequestReferenceSpacePromise&&);
>+
>+    int requestAnimationFrame(Ref<XRFrameRequestCallback>&&);
>+    void cancelAnimationFrame(int handle);
>+
>+    void end(EndPromise&&);
>+
>+    bool ended() const { return m_ended; }
>+
>+protected:
>+    // EventTarget
>+    EventTargetInterface eventTargetInterface() const override { return WebXRSessionEventTargetInterfaceType; }
>+    ScriptExecutionContext* scriptExecutionContext() const override { return ActiveDOMObject::scriptExecutionContext(); }
>+    void refEventTarget() override { ref(); }
>+    void derefEventTarget() override { deref(); }
>+
>+    // ActiveDOMObject
>+    const char* activeDOMObjectName() const override;
>+    void stop() override;
>+
>+    XREnvironmentBlendMode m_environmentBlendMode;
>+    XRVisibilityState m_visibilityState;
>+    RefPtr<WebXRRenderState> m_renderState;
>+    RefPtr<WebXRInputSourceArray> m_inputSources;
>+    bool m_ended { false };
>+};
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/WebXRSession.idl b/Source/WebCore/Modules/webxr/WebXRSession.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..f9b43079c06205f1efe82d506c48c1ea07fedcfd
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRSession.idl
>@@ -0,0 +1,56 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBXR,
>+    ActiveDOMObject,
>+    SecureContext,
>+    Exposed=Window,
>+    InterfaceName=XRSession
>+] interface WebXRSession : EventTarget {
>+    // Attributes
>+    readonly attribute XREnvironmentBlendMode environmentBlendMode;
>+    readonly attribute XRVisibilityState visibilityState;
>+    [SameObject] readonly attribute WebXRRenderState renderState;
>+    [SameObject] readonly attribute WebXRInputSourceArray inputSources;
>+
>+    // Methods
>+    void updateRenderState(optional XRRenderStateInit stateInit);
>+    [NewObject] Promise<WebXRReferenceSpace> requestReferenceSpace(XRReferenceSpaceType type);
>+
>+    long requestAnimationFrame(XRFrameRequestCallback callback);
>+    void cancelAnimationFrame(long handle);
>+
>+    Promise<void> end();
>+
>+    // Events
>+    attribute EventHandler onend;
>+    attribute EventHandler onselect;
>+    attribute EventHandler oninputsourceschange;
>+    attribute EventHandler onselectstart;
>+    attribute EventHandler onselectend;
>+    attribute EventHandler onvisibilitychange;
>+};
>diff --git a/Source/WebCore/Modules/webxr/WebXRSpace.cpp b/Source/WebCore/Modules/webxr/WebXRSpace.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..a555dfeb0559570ccc2c9d76f7634b9777488dec
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRSpace.cpp
>@@ -0,0 +1,46 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include "config.h"
>+#include "WebXRSpace.h"
>+
>+#if ENABLE(WEBXR)
>+
>+#include <wtf/IsoMallocInlines.h>
>+
>+namespace WebCore {
>+
>+WTF_MAKE_ISO_ALLOCATED_IMPL(WebXRSpace);
>+
>+WebXRSpace::WebXRSpace(ScriptExecutionContext& context)
>+    : ContextDestructionObserver(&context)
>+{
>+}
>+
>+WebXRSpace::~WebXRSpace() = default;
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/WebXRSpace.h b/Source/WebCore/Modules/webxr/WebXRSpace.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..2b4a8a40d3d36f0b8e7d6021008c6f51a88ab121
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRSpace.h
>@@ -0,0 +1,61 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBXR)
>+
>+#include "ContextDestructionObserver.h"
>+#include "EventTarget.h"
>+#include <wtf/RefCounted.h>
>+
>+namespace WebCore {
>+
>+class ScriptExecutionContext;
>+
>+class WebXRSpace : public RefCounted<WebXRSpace>, public EventTargetWithInlineData, public ContextDestructionObserver {
>+    WTF_MAKE_ISO_ALLOCATED(WebXRSpace);
>+public:
>+    virtual ~WebXRSpace();
>+
>+    using RefCounted<WebXRSpace>::ref;
>+    using RefCounted<WebXRSpace>::deref;
>+
>+protected:
>+    WebXRSpace(ScriptExecutionContext&);
>+
>+    // EventTarget
>+    ScriptExecutionContext* scriptExecutionContext() const override { return ContextDestructionObserver::scriptExecutionContext(); }
>+
>+private:
>+    // EventTarget
>+    EventTargetInterface eventTargetInterface() const override { return WebXRSpaceEventTargetInterfaceType; }
>+    void refEventTarget() override { ref(); }
>+    void derefEventTarget() override { deref(); }
>+};
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/WebXRSpace.idl b/Source/WebCore/Modules/webxr/WebXRSpace.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..bb794f18b233170676d1d5499b9a17116aee7cb1
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRSpace.idl
>@@ -0,0 +1,33 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBXR,
>+    SecureContext,
>+    Exposed=Window,
>+    InterfaceName=XRSpace
>+] interface WebXRSpace : EventTarget {
>+};
>diff --git a/Source/WebCore/Modules/webxr/WebXRSystem.cpp b/Source/WebCore/Modules/webxr/WebXRSystem.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..3ac4d5280344ea43611384e261a5ffdaf2c1310c
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRSystem.cpp
>@@ -0,0 +1,92 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include "config.h"
>+#include "WebXRSystem.h"
>+
>+#if ENABLE(WEBXR)
>+
>+#include "PlatformXR.h"
>+#include <wtf/IsoMallocInlines.h>
>+
>+namespace WebCore {
>+
>+WTF_MAKE_ISO_ALLOCATED_IMPL(WebXRSystem);
>+
>+Ref<WebXRSystem> WebXRSystem::create(ScriptExecutionContext& scriptExecutionContext)
>+{
>+    return adoptRef(*new WebXRSystem(scriptExecutionContext));
>+}
>+
>+WebXRSystem::WebXRSystem(ScriptExecutionContext& scriptExecutionContext)
>+    : ActiveDOMObject(&scriptExecutionContext)
>+{
>+}
>+
>+WebXRSystem::~WebXRSystem() = default;
>+
>+void WebXRSystem::isSessionSupported(XRSessionMode, IsSessionSupportedPromise&&)
>+{
>+    // When the supportsSession(mode) method is invoked, it MUST return a new Promise promise and run the following steps in parallel:
>+    //   1. Ensure an XR device is selected.
>+    //   2. If the XR device is null, reject promise with a "NotSupportedError" DOMException and abort these steps.
>+    //   3. If the XR device's list of supported modes does not contain mode, reject promise with a "NotSupportedError" DOMException and abort these steps.
>+    //   4. Else resolve promise.
>+}
>+
>+void WebXRSystem::requestSession(XRSessionMode, const XRSessionInit&, RequestSessionPromise&&)
>+{
>+    PlatformXR::Instance::singleton();
>+
>+    // When the requestSession(mode) method is invoked, the user agent MUST return a new Promise promise and run the following steps in parallel:
>+    //   1. Let immersive be true if mode is "immersive-vr" or "immersive-ar", and false otherwise.
>+    //   2. If immersive is true:
>+    //     1. If pending immersive session is true or active immersive session is not null, reject promise with an "InvalidStateError" DOMException and abort these steps.
>+    //     2. Else set pending immersive session to be true.
>+    //   3. Ensure an XR device is selected.
>+    //   4. If the XR device is null, reject promise with null.
>+    //   5. Else if the XR device's list of supported modes does not contain mode, reject promise with a "NotSupportedError" DOMException.
>+    //   6. Else If immersive is true and the algorithm is not triggered by user activation, reject promise with a "SecurityError" DOMException and abort these steps.
>+    //   7. If promise was rejected and immersive is true, set pending immersive session to false.
>+    //   8. If promise was rejected, abort these steps.
>+    //   9. Let session be a new XRSession object.
>+    //   10. Initialize the session with session and mode.
>+    //   11. If immersive is true, set the active immersive session to session, and set pending immersive session to false.
>+    //   12. Else append session to the list of inline sessions.
>+    //   13. Resolve promise with session.
>+}
>+
>+const char* WebXRSystem::activeDOMObjectName() const
>+{
>+    return "XRSystem";
>+}
>+
>+void WebXRSystem::stop()
>+{
>+}
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/WebXRSystem.h b/Source/WebCore/Modules/webxr/WebXRSystem.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..e9ab15d7aea445d1332fc212a456845dced9cee1
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRSystem.h
>@@ -0,0 +1,74 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBXR)
>+
>+#include "ActiveDOMObject.h"
>+#include "EventTarget.h"
>+#include "JSDOMPromiseDeferred.h"
>+#include "XRSessionMode.h"
>+#include <wtf/IsoMalloc.h>
>+#include <wtf/RefCounted.h>
>+
>+namespace WebCore {
>+
>+class ScriptExecutionContext;
>+class WebXRSession;
>+struct XRSessionInit;
>+
>+class WebXRSystem final : public RefCounted<WebXRSystem>, public EventTargetWithInlineData, public ActiveDOMObject {
>+    WTF_MAKE_ISO_ALLOCATED(WebXRSystem);
>+public:
>+    using IsSessionSupportedPromise = DOMPromiseDeferred<IDLBoolean>;
>+    using RequestSessionPromise = DOMPromiseDeferred<IDLInterface<WebXRSession>>;
>+
>+    static Ref<WebXRSystem> create(ScriptExecutionContext&);
>+    virtual ~WebXRSystem();
>+
>+    using RefCounted<WebXRSystem>::ref;
>+    using RefCounted<WebXRSystem>::deref;
>+
>+    void isSessionSupported(XRSessionMode, IsSessionSupportedPromise&&);
>+    void requestSession(XRSessionMode, const XRSessionInit&, RequestSessionPromise&&);
>+
>+protected:
>+    WebXRSystem(ScriptExecutionContext&);
>+
>+    // EventTarget
>+    EventTargetInterface eventTargetInterface() const override { return WebXRSystemEventTargetInterfaceType; }
>+    ScriptExecutionContext* scriptExecutionContext() const override { return ActiveDOMObject::scriptExecutionContext(); }
>+    void refEventTarget() override { ref(); }
>+    void derefEventTarget() override { deref(); }
>+
>+    // ActiveDOMObject
>+    const char* activeDOMObjectName() const override;
>+    void stop() override;
>+};
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/WebXRSystem.idl b/Source/WebCore/Modules/webxr/WebXRSystem.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..38a760cca9d6df33826fd3e3daf8232051f390a0
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRSystem.idl
>@@ -0,0 +1,40 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBXR,
>+    ActiveDOMObject,
>+    SecureContext,
>+    Exposed=Window,
>+    InterfaceName=XRSystem
>+] interface WebXRSystem : EventTarget {
>+    // Methods
>+    Promise<void> isSessionSupported(XRSessionMode mode);
>+    [NewObject] Promise<WebXRSession> requestSession(XRSessionMode mode, optional XRSessionInit options);
>+
>+    // Events
>+    attribute EventHandler ondevicechange;
>+};
>diff --git a/Source/WebCore/Modules/webxr/WebXRView.cpp b/Source/WebCore/Modules/webxr/WebXRView.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..24403b70ddc1dcf998f318301ca6d00523d0aca6
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRView.cpp
>@@ -0,0 +1,70 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include "config.h"
>+#include "WebXRView.h"
>+
>+#if ENABLE(WEBXR)
>+
>+#include "WebXRRigidTransform.h"
>+#include <JavaScriptCore/TypedArrayInlines.h>
>+#include <wtf/IsoMallocInlines.h>
>+
>+namespace WebCore {
>+
>+WTF_MAKE_ISO_ALLOCATED_IMPL(WebXRView);
>+
>+Ref<WebXRView> WebXRView::create()
>+{
>+    return adoptRef(*new WebXRView);
>+}
>+
>+WebXRView::WebXRView()
>+    : m_eye(XREye::Left)
>+    , m_projectionMatrix(Float32Array::create(0))
>+    , m_transform(WebXRRigidTransform::create())
>+{
>+}
>+
>+WebXRView::~WebXRView() = default;
>+
>+XREye WebXRView::eye() const
>+{
>+    return m_eye;
>+}
>+
>+const Float32Array& WebXRView::projectionMatrix() const
>+{
>+    return m_projectionMatrix;
>+}
>+
>+const WebXRRigidTransform& WebXRView::transform() const
>+{
>+    return m_transform;
>+}
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/WebXRView.h b/Source/WebCore/Modules/webxr/WebXRView.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..f3580c6cf7b529b7bee8b9988bfee94ebe8e3829
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRView.h
>@@ -0,0 +1,60 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBXR)
>+
>+#include "XREye.h"
>+#include <JavaScriptCore/Float32Array.h>
>+#include <wtf/IsoMalloc.h>
>+#include <wtf/Ref.h>
>+#include <wtf/RefCounted.h>
>+
>+namespace WebCore {
>+
>+class WebXRRigidTransform;
>+
>+class WebXRView : public RefCounted<WebXRView> {
>+    WTF_MAKE_ISO_ALLOCATED(WebXRView);
>+public:
>+    static Ref<WebXRView> create();
>+    ~WebXRView();
>+
>+    XREye eye() const;
>+    const Float32Array& projectionMatrix() const;
>+    const WebXRRigidTransform& transform() const;
>+
>+private:
>+    WebXRView();
>+
>+    XREye m_eye;
>+    Ref<Float32Array> m_projectionMatrix;
>+    Ref<WebXRRigidTransform> m_transform;
>+};
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/WebXRView.idl b/Source/WebCore/Modules/webxr/WebXRView.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..d25f429814662173214c47d6d5c142e358e21923
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRView.idl
>@@ -0,0 +1,37 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBXR,
>+    SecureContext,
>+    Exposed=Window,
>+    ImplementationLacksVTable,
>+    InterfaceName=XRView
>+] interface WebXRView {
>+    readonly attribute XREye eye;
>+    readonly attribute Float32Array projectionMatrix;
>+    [SameObject] readonly attribute WebXRRigidTransform transform;
>+};
>diff --git a/Source/WebCore/Modules/webxr/WebXRViewerPose.cpp b/Source/WebCore/Modules/webxr/WebXRViewerPose.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..6063c95f3643adab0a281da88b3cbae65a797b09
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRViewerPose.cpp
>@@ -0,0 +1,48 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include "config.h"
>+#include "WebXRViewerPose.h"
>+
>+#if ENABLE(WEBXR)
>+
>+namespace WebCore {
>+
>+Ref<WebXRViewerPose> WebXRViewerPose::create()
>+{
>+    return adoptRef(*new WebXRViewerPose);
>+}
>+
>+WebXRViewerPose::WebXRViewerPose() = default;
>+WebXRViewerPose::~WebXRViewerPose() = default;
>+
>+const Vector<Ref<WebXRView>>& WebXRViewerPose::views() const
>+{
>+    return m_views;
>+}
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/WebXRViewerPose.h b/Source/WebCore/Modules/webxr/WebXRViewerPose.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..a4ed25b10c25319a6e9218528064e51c8d4d8f20
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRViewerPose.h
>@@ -0,0 +1,54 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBXR)
>+
>+#include "WebXRPose.h"
>+#include "WebXRView.h"
>+#include <wtf/IsoMalloc.h>
>+#include <wtf/Ref.h>
>+#include <wtf/RefCounted.h>
>+#include <wtf/Vector.h>
>+
>+namespace WebCore {
>+
>+class WebXRViewerPose : public WebXRPose {
>+public:
>+    static Ref<WebXRViewerPose> create();
>+    ~WebXRViewerPose();
>+
>+    const Vector<Ref<WebXRView>>& views() const;
>+
>+private:
>+    WebXRViewerPose();
>+
>+    Vector<Ref<WebXRView>> m_views;
>+};
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/WebXRViewerPose.idl b/Source/WebCore/Modules/webxr/WebXRViewerPose.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..d1beb2c086f89bfafdf5e0bf1f95c0f48c607613
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRViewerPose.idl
>@@ -0,0 +1,35 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBXR,
>+    SecureContext,
>+    Exposed=Window,
>+    ImplementationLacksVTable,
>+    InterfaceName=XRViewerPose
>+] interface WebXRViewerPose : WebXRPose {
>+    [SameObject] readonly attribute FrozenArray<WebXRView> views;
>+};
>diff --git a/Source/WebCore/Modules/webxr/WebXRViewport.cpp b/Source/WebCore/Modules/webxr/WebXRViewport.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..cbaa3c8a5a93e6d1e9e693a19d410cfcd53f9ddb
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRViewport.cpp
>@@ -0,0 +1,66 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include "config.h"
>+#include "WebXRViewport.h"
>+
>+#if ENABLE(WEBXR)
>+
>+#include <wtf/IsoMallocInlines.h>
>+
>+namespace WebCore {
>+
>+WTF_MAKE_ISO_ALLOCATED_IMPL(WebXRViewport);
>+
>+Ref<WebXRViewport> WebXRViewport::create()
>+{
>+    return adoptRef(*new WebXRViewport);
>+}
>+
>+WebXRViewport::WebXRViewport() = default;
>+
>+int WebXRViewport::x() const
>+{
>+    return 0;
>+}
>+
>+int WebXRViewport::y() const
>+{
>+    return 0;
>+}
>+
>+int WebXRViewport::width() const
>+{
>+    return 0;
>+}
>+
>+int WebXRViewport::height() const
>+{
>+    return 0;
>+}
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/WebXRViewport.h b/Source/WebCore/Modules/webxr/WebXRViewport.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..2f8246a9b1d4eaa3a0411164b16b5e469c203014
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRViewport.h
>@@ -0,0 +1,52 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBXR)
>+
>+#include <wtf/IsoMalloc.h>
>+#include <wtf/Ref.h>
>+#include <wtf/RefCounted.h>
>+
>+namespace WebCore {
>+
>+class WebXRViewport : public RefCounted<WebXRViewport> {
>+    WTF_MAKE_ISO_ALLOCATED(WebXRViewport);
>+public:
>+    static Ref<WebXRViewport> create();
>+
>+    int x() const;
>+    int y() const;
>+    int width() const;
>+    int height() const;
>+
>+private:
>+    WebXRViewport();
>+};
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/WebXRViewport.idl b/Source/WebCore/Modules/webxr/WebXRViewport.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..99b51ecf14c363f183458335789d7d0ccff2c972
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRViewport.idl
>@@ -0,0 +1,38 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBXR,
>+    SecureContext,
>+    Exposed=Window,
>+    ImplementationLacksVTable,
>+    InterfaceName=XRViewport
>+] interface WebXRViewport {
>+    readonly attribute long x;
>+    readonly attribute long y;
>+    readonly attribute long width;
>+    readonly attribute long height;
>+};
>diff --git a/Source/WebCore/Modules/webxr/WebXRWebGLLayer.cpp b/Source/WebCore/Modules/webxr/WebXRWebGLLayer.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..9a78e8b0b67d031814a9eead6d822c56a87f06a7
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRWebGLLayer.cpp
>@@ -0,0 +1,132 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include "config.h"
>+#include "WebXRWebGLLayer.h"
>+
>+#if ENABLE(WEBXR)
>+
>+#include "WebGLFramebuffer.h"
>+#include "WebGLRenderingContext.h"
>+#if ENABLE(WEBGL2)
>+#include "WebGL2RenderingContext.h"
>+#endif
>+#include "WebXRSession.h"
>+#include "WebXRViewport.h"
>+#include "XRWebGLLayerInit.h"
>+
>+namespace WebCore {
>+
>+ExceptionOr<Ref<WebXRWebGLLayer>> WebXRWebGLLayer::create(const WebXRSession& session, WebXRRenderingContext&& context, const XRWebGLLayerInit& init)
>+{
>+    // The XRWebGLLayer(session, context, layerInit) constructor MUST perform the following steps when invoked:
>+    //   1. Let layer be a new XRWebGLLayer
>+
>+    //   2. If sessionâs ended value is true, throw an InvalidStateError and abort these steps.
>+    if (session.ended())
>+        return Exception { InvalidStateError };
>+
>+    //   3. If context is lost, throw an InvalidStateError and abort these steps.
>+    //   4. If contextâs XR compatible boolean is false, throw an InvalidStateError and abort these steps.
>+    // FIXME: TODO
>+
>+    //   5. Initialize layerâs context to context.
>+    //   6. Initialize layerâs antialias to layerInitâs antialias value.
>+    //   7. If layerInitâs ignoreDepthValues value is false and the XR Compositor will make use of depth values, Initialize layerâs ignoreDepthValues to false.
>+    //   8. Else Initialize layerâs ignoreDepthValues to true
>+    //   9. Initialize layerâs framebuffer to a new opaque framebuffer created with context.
>+    //   10. Initialize the layerâs swap chain.
>+    //   11. If layerâs swap chain was unable to be created for any reason, throw an OperationError and abort these steps.
>+    // FIXME: TODO
>+
>+    //   12. Return layer.
>+    return adoptRef(*new WebXRWebGLLayer(session, WTFMove(context), init));
>+}
>+
>+WebXRWebGLLayer::WebXRWebGLLayer(const WebXRSession&, WebXRRenderingContext&& context, const XRWebGLLayerInit& init)
>+    : m_context(WTFMove(context))
>+    , m_antialias(init.antialias)
>+    , m_ignoreDepthValues(init.ignoreDepthValues)
>+{
>+    m_framebuffer.object = WTF::switchOn(m_context,
>+        [](const RefPtr<WebGLRenderingContext>& context)
>+        {
>+            RefPtr<WebGLFramebuffer> frameBuffer = WebGLFramebuffer::create(*context);
>+            return frameBuffer;
>+        },
>+#if ENABLE(WEBGL2)
>+        [](const RefPtr<WebGL2RenderingContext>& context)
>+        {
>+            RefPtr<WebGLFramebuffer> frameBuffer = WebGLFramebuffer::create(*context);
>+            return frameBuffer;
>+        },
>+#endif
>+        [](WTF::Monostate) {
>+            ASSERT_NOT_REACHED();
>+            return nullptr;
>+        }
>+    );
>+}
>+
>+WebXRWebGLLayer::~WebXRWebGLLayer() = default;
>+
>+bool WebXRWebGLLayer::antialias() const
>+{
>+    return m_antialias;
>+}
>+
>+bool WebXRWebGLLayer::ignoreDepthValues() const
>+{
>+    return m_ignoreDepthValues;
>+}
>+
>+const WebGLFramebuffer& WebXRWebGLLayer::framebuffer() const
>+{
>+    return *m_framebuffer.object;
>+}
>+
>+unsigned WebXRWebGLLayer::framebufferWidth() const
>+{
>+    return m_framebuffer.width;
>+}
>+
>+unsigned WebXRWebGLLayer::framebufferHeight() const
>+{
>+    return m_framebuffer.height;
>+}
>+
>+RefPtr<WebXRViewport> WebXRWebGLLayer::getViewport(const WebXRView&)
>+{
>+    return { };
>+}
>+
>+double WebXRWebGLLayer::getNativeFramebufferScaleFactor(const WebXRSession&)
>+{
>+    return 1.0;
>+}
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/WebXRWebGLLayer.h b/Source/WebCore/Modules/webxr/WebXRWebGLLayer.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..52d0483ed5fb61e2023b439ed1ff2611bf1bfc11
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRWebGLLayer.h
>@@ -0,0 +1,91 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBXR)
>+
>+#include "ExceptionOr.h"
>+#include <wtf/IsoMalloc.h>
>+#include <wtf/Ref.h>
>+#include <wtf/RefCounted.h>
>+#include <wtf/RefPtr.h>
>+#include <wtf/Variant.h>
>+
>+namespace WebCore {
>+
>+class WebGLFramebuffer;
>+class WebGLRenderingContext;
>+#if ENABLE(WEBGL2)
>+class WebGL2RenderingContext;
>+#endif
>+class WebXRSession;
>+class WebXRView;
>+class WebXRViewport;
>+struct XRWebGLLayerInit;
>+
>+class WebXRWebGLLayer : public RefCounted<WebXRWebGLLayer> {
>+public:
>+    
>+    using WebXRRenderingContext = WTF::Variant<
>+        RefPtr<WebGLRenderingContext>,
>+#if ENABLE(WEBGL2)
>+        RefPtr<WebGL2RenderingContext>
>+#else
>+        WTF::Monostate
>+#endif
>+    >;
>+
>+    static ExceptionOr<Ref<WebXRWebGLLayer>> create(const WebXRSession&, WebXRRenderingContext&&, const XRWebGLLayerInit&);
>+    ~WebXRWebGLLayer();
>+
>+    bool antialias() const;
>+    bool ignoreDepthValues() const;
>+
>+    const WebGLFramebuffer& framebuffer() const;
>+    unsigned framebufferWidth() const;
>+    unsigned framebufferHeight() const;
>+
>+    RefPtr<WebXRViewport> getViewport(const WebXRView&);
>+
>+    static double getNativeFramebufferScaleFactor(const WebXRSession&);
>+
>+private:
>+    WebXRWebGLLayer(const WebXRSession&, WebXRRenderingContext&&, const XRWebGLLayerInit&);
>+
>+    WebXRRenderingContext m_context;
>+    bool m_antialias { false };
>+    bool m_ignoreDepthValues { false };
>+
>+    struct {
>+        RefPtr<WebGLFramebuffer> object;
>+        unsigned width { 0 };
>+        unsigned height { 0 };
>+    } m_framebuffer;
>+};
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/WebXRWebGLLayer.idl b/Source/WebCore/Modules/webxr/WebXRWebGLLayer.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..08bad37bd7c2a39ce169a06644f8a4959ceb9661
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/WebXRWebGLLayer.idl
>@@ -0,0 +1,51 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+typedef (WebGLRenderingContext or WebGL2RenderingContext) WebXRWebGLRenderingContext;
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBXR,
>+    SecureContext,
>+    Exposed=Window,
>+    Constructor(WebXRSession session, WebXRWebGLRenderingContext context, optional XRWebGLLayerInit layerInit),
>+    ConstructorMayThrowException,
>+    ImplementationLacksVTable,
>+    InterfaceName=XRWebGLLayer
>+] interface WebXRWebGLLayer {
>+    // Attributes
>+    readonly attribute boolean antialias;
>+    readonly attribute boolean ignoreDepthValues;
>+
>+    [SameObject] readonly attribute WebGLFramebuffer framebuffer;
>+    readonly attribute unsigned long framebufferWidth;
>+    readonly attribute unsigned long framebufferHeight;
>+
>+    // Methods
>+    WebXRViewport? getViewport(WebXRView view);
>+
>+    // Static Methods
>+    static double getNativeFramebufferScaleFactor(WebXRSession session);
>+};
>diff --git a/Source/WebCore/Modules/webxr/XREnvironmentBlendMode.h b/Source/WebCore/Modules/webxr/XREnvironmentBlendMode.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..66f4072a715cdf5cb7133b329f9cb8ea578760ff
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XREnvironmentBlendMode.h
>@@ -0,0 +1,40 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBXR)
>+
>+namespace WebCore {
>+
>+enum class XREnvironmentBlendMode {
>+    Opaque,
>+    Additive,
>+    AlphaBlend
>+};
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/XREnvironmentBlendMode.idl b/Source/WebCore/Modules/webxr/XREnvironmentBlendMode.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..eefa088cfced6109e9ccb21def3c411e88ca38f4
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XREnvironmentBlendMode.idl
>@@ -0,0 +1,33 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBXR
>+] enum XREnvironmentBlendMode {
>+    "opaque",
>+    "additive",
>+    "alpha-blend"
>+};
>diff --git a/Source/WebCore/Modules/webxr/XREye.h b/Source/WebCore/Modules/webxr/XREye.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..ea1ea7e1e7d8226325f60c826fffbc0b9ba4d66f
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XREye.h
>@@ -0,0 +1,40 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBXR)
>+
>+namespace WebCore {
>+
>+enum class XREye {
>+    None,
>+    Left,
>+    Right,
>+};
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/XREye.idl b/Source/WebCore/Modules/webxr/XREye.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..9ad1e4304a62ea65937035465954403962038392
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XREye.idl
>@@ -0,0 +1,33 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBXR
>+] enum XREye {
>+    "none",
>+    "left",
>+    "right"
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRFrameRequestCallback.h b/Source/WebCore/Modules/webxr/XRFrameRequestCallback.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..18504976884ec18eef381edacc2a5354f1cf2832
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRFrameRequestCallback.h
>@@ -0,0 +1,47 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBXR)
>+
>+#include "ActiveDOMCallback.h"
>+#include "CallbackResult.h"
>+#include <wtf/RefCounted.h>
>+
>+namespace WebCore {
>+
>+class WebXRFrame;
>+
>+class XRFrameRequestCallback : public RefCounted<XRFrameRequestCallback>, public ActiveDOMCallback {
>+public:
>+    using ActiveDOMCallback::ActiveDOMCallback;
>+
>+    virtual CallbackResult<void> handleEvent(double highResTimeMs, WebXRFrame&) = 0;
>+};
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/XRFrameRequestCallback.idl b/Source/WebCore/Modules/webxr/XRFrameRequestCallback.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..a6b151a31baf8e7b980b12f52509484fc594817d
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRFrameRequestCallback.idl
>@@ -0,0 +1,30 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+typedef double DOMHighResTimeStamp;
>+
>+[
>+    Conditional=WEBXR
>+] callback XRFrameRequestCallback = void (DOMHighResTimeStamp time, WebXRFrame frame);
>diff --git a/Source/WebCore/Modules/webxr/XRHandedness.h b/Source/WebCore/Modules/webxr/XRHandedness.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..9333034d0cd49ac8dee902a081644804378cbc2c
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRHandedness.h
>@@ -0,0 +1,40 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBXR)
>+
>+namespace WebCore {
>+
>+enum class XRHandedness {
>+    None,
>+    Left,
>+    Right,
>+};
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/XRHandedness.idl b/Source/WebCore/Modules/webxr/XRHandedness.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..53f705a600beebb21e81d812f2d7d0c72c506f0a
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRHandedness.idl
>@@ -0,0 +1,33 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBXR
>+] enum XRHandedness {
>+    "none",
>+    "left",
>+    "right"
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRInputSourceEvent.cpp b/Source/WebCore/Modules/webxr/XRInputSourceEvent.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..22631ab55297056cc063d744689d3e033ca0fa57
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRInputSourceEvent.cpp
>@@ -0,0 +1,70 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include "config.h"
>+#include "XRInputSourceEvent.h"
>+
>+#if ENABLE(WEBXR)
>+
>+#include "WebXRFrame.h"
>+#include "WebXRInputSource.h"
>+
>+namespace WebCore {
>+
>+Ref<XRInputSourceEvent> XRInputSourceEvent::create(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
>+{
>+    return adoptRef(*new XRInputSourceEvent(type, initializer, isTrusted));
>+}
>+
>+XRInputSourceEvent::XRInputSourceEvent(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
>+    : Event(type, initializer, isTrusted)
>+    , m_frame(initializer.frame)
>+    , m_inputSource(initializer.inputSource)
>+    , m_buttonIndex(initializer.buttonIndex)
>+{
>+    ASSERT(m_frame);
>+    ASSERT(m_inputSource);
>+}
>+
>+XRInputSourceEvent::~XRInputSourceEvent() = default;
>+
>+const WebXRFrame& XRInputSourceEvent::frame() const
>+{
>+    return *m_frame;
>+}
>+
>+const WebXRInputSource& XRInputSourceEvent::inputSource() const
>+{
>+    return *m_inputSource;
>+}
>+
>+Optional<int> XRInputSourceEvent::buttonIndex() const
>+{
>+    return m_buttonIndex;
>+}
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/XRInputSourceEvent.h b/Source/WebCore/Modules/webxr/XRInputSourceEvent.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..8c7fc04747a2bf11ea8b2fb7b5ca9f454ac15303
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRInputSourceEvent.h
>@@ -0,0 +1,64 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBXR)
>+
>+#include "Event.h"
>+#include <wtf/Optional.h>
>+#include <wtf/RefPtr.h>
>+
>+namespace WebCore {
>+
>+class WebXRFrame;
>+class WebXRInputSource;
>+
>+class XRInputSourceEvent final : public Event {
>+public:
>+    struct Init : EventInit {
>+        RefPtr<WebXRFrame> frame;
>+        RefPtr<WebXRInputSource> inputSource;
>+        Optional<int> buttonIndex;
>+    };
>+
>+    static Ref<XRInputSourceEvent> create(const AtomString&, const Init&, IsTrusted = IsTrusted::No);
>+    virtual ~XRInputSourceEvent();
>+
>+    const WebXRFrame& frame() const;
>+    const WebXRInputSource& inputSource() const;
>+    Optional<int> buttonIndex() const;
>+
>+private:
>+    XRInputSourceEvent(const AtomString&, const Init&, IsTrusted);
>+
>+    RefPtr<WebXRFrame> m_frame;
>+    RefPtr<WebXRInputSource> m_inputSource;
>+    Optional<int> m_buttonIndex;
>+};
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/XRInputSourceEvent.idl b/Source/WebCore/Modules/webxr/XRInputSourceEvent.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..9b48a602f8b1259fd8899ae1675afab2443bf160
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRInputSourceEvent.idl
>@@ -0,0 +1,43 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBXR,
>+] dictionary XRInputSourceEventInit : EventInit {
>+    required WebXRFrame frame;
>+    required WebXRInputSource inputSource;
>+};
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBXR,
>+    SecureContext,
>+    Exposed=Window,
>+    Constructor(DOMString type, XRInputSourceEventInit eventInitDict),
>+] interface XRInputSourceEvent : Event {
>+    [SameObject] readonly attribute WebXRFrame frame;
>+    [SameObject] readonly attribute WebXRInputSource inputSource;
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRInputSourcesChangeEvent.cpp b/Source/WebCore/Modules/webxr/XRInputSourcesChangeEvent.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..709c22ffe45905a06fa1c890078430d701680a0a
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRInputSourcesChangeEvent.cpp
>@@ -0,0 +1,68 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include "config.h"
>+#include "XRInputSourcesChangeEvent.h"
>+
>+#if ENABLE(WEBXR)
>+
>+#include "WebXRInputSource.h"
>+#include "WebXRSession.h"
>+
>+namespace WebCore {
>+
>+Ref<XRInputSourcesChangeEvent> XRInputSourcesChangeEvent::create(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
>+{
>+    return adoptRef(*new XRInputSourcesChangeEvent(type, initializer, isTrusted));
>+}
>+
>+XRInputSourcesChangeEvent::XRInputSourcesChangeEvent(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
>+    : Event(type, initializer, isTrusted)
>+    , m_session(*initializer.session)
>+    , m_added(initializer.added)
>+    , m_removed(initializer.removed)
>+{
>+}
>+
>+XRInputSourcesChangeEvent::~XRInputSourcesChangeEvent() = default;
>+
>+const WebXRSession& XRInputSourcesChangeEvent::session() const
>+{
>+    return m_session;
>+}
>+
>+const Vector<RefPtr<WebXRInputSource>>& XRInputSourcesChangeEvent::added() const
>+{
>+    return m_added;
>+}
>+
>+const Vector<RefPtr<WebXRInputSource>>& XRInputSourcesChangeEvent::removed() const
>+{
>+    return m_removed;
>+}
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/XRInputSourcesChangeEvent.h b/Source/WebCore/Modules/webxr/XRInputSourcesChangeEvent.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..2e4ecc774f98db30a2228180a8e6ab638a2c48a1
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRInputSourcesChangeEvent.h
>@@ -0,0 +1,64 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBXR)
>+
>+#include "Event.h"
>+#include <wtf/Ref.h>
>+#include <wtf/Vector.h>
>+
>+namespace WebCore {
>+
>+class WebXRInputSource;
>+class WebXRSession;
>+
>+class XRInputSourcesChangeEvent final : public Event {
>+public:
>+    struct Init : EventInit {
>+        RefPtr<WebXRSession> session;
>+        Vector<RefPtr<WebXRInputSource>> added;
>+        Vector<RefPtr<WebXRInputSource>> removed;
>+    };
>+
>+    static Ref<XRInputSourcesChangeEvent> create(const AtomString&, const Init&, IsTrusted = IsTrusted::No);
>+    virtual ~XRInputSourcesChangeEvent();
>+
>+    const WebXRSession& session() const;
>+    const Vector<RefPtr<WebXRInputSource>>& added() const;
>+    const Vector<RefPtr<WebXRInputSource>>& removed() const;
>+
>+private:
>+    XRInputSourcesChangeEvent(const AtomString&, const Init&, IsTrusted);
>+
>+    Ref<WebXRSession> m_session;
>+    Vector<RefPtr<WebXRInputSource>> m_added;
>+    Vector<RefPtr<WebXRInputSource>> m_removed;
>+};
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/XRInputSourcesChangeEvent.idl b/Source/WebCore/Modules/webxr/XRInputSourcesChangeEvent.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..68a46592b96cbd9f1ff167bb1910a6e147daec06
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRInputSourcesChangeEvent.idl
>@@ -0,0 +1,45 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBXR,
>+] dictionary XRInputSourcesChangeEventInit : EventInit {
>+    required WebXRSession session;
>+    required FrozenArray<WebXRInputSource> added;
>+    required FrozenArray<WebXRInputSource> removed;
>+};
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBXR,
>+    SecureContext,
>+    Exposed=Window,
>+    Constructor(DOMString type, XRInputSourcesChangeEventInit eventInitDict),
>+] interface XRInputSourcesChangeEvent : Event {
>+    [SameObject] readonly attribute WebXRSession session;
>+    [SameObject] readonly attribute FrozenArray<WebXRInputSource> added;
>+    [SameObject] readonly attribute FrozenArray<WebXRInputSource> removed;
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRReferenceSpaceEvent.cpp b/Source/WebCore/Modules/webxr/XRReferenceSpaceEvent.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..f7899b348b55fd2794387b3fc8f4d2c0df113ce8
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRReferenceSpaceEvent.cpp
>@@ -0,0 +1,64 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include "config.h"
>+#include "XRReferenceSpaceEvent.h"
>+
>+#if ENABLE(WEBXR)
>+
>+#include "WebXRReferenceSpace.h"
>+#include "WebXRRigidTransform.h"
>+
>+namespace WebCore {
>+
>+Ref<XRReferenceSpaceEvent> XRReferenceSpaceEvent::create(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
>+{
>+    return adoptRef(*new XRReferenceSpaceEvent(type, initializer, isTrusted));
>+}
>+
>+XRReferenceSpaceEvent::XRReferenceSpaceEvent(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
>+    : Event(type, initializer, isTrusted)
>+    , m_referenceSpace(initializer.referenceSpace)
>+    , m_transform(initializer.transform)
>+{
>+    ASSERT(m_referenceSpace);
>+    ASSERT(m_transform);
>+}
>+
>+XRReferenceSpaceEvent::~XRReferenceSpaceEvent() = default;
>+
>+const WebXRReferenceSpace& XRReferenceSpaceEvent::referenceSpace() const
>+{
>+    return *m_referenceSpace;
>+}
>+
>+const WebXRRigidTransform& XRReferenceSpaceEvent::transform() const
>+{
>+    return *m_transform;
>+}
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/XRReferenceSpaceEvent.h b/Source/WebCore/Modules/webxr/XRReferenceSpaceEvent.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..ac520a7cdf19009914432dfba9e758b88f3ed8fa
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRReferenceSpaceEvent.h
>@@ -0,0 +1,61 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBXR)
>+
>+#include "Event.h"
>+#include <wtf/Ref.h>
>+#include <wtf/RefPtr.h>
>+
>+namespace WebCore {
>+
>+class WebXRReferenceSpace;
>+class WebXRRigidTransform;
>+
>+class XRReferenceSpaceEvent : public Event {
>+public:
>+    struct Init : EventInit {
>+        RefPtr<WebXRReferenceSpace> referenceSpace;
>+        RefPtr<WebXRRigidTransform> transform;
>+    };
>+
>+    static Ref<XRReferenceSpaceEvent> create(const AtomString&, const Init&, IsTrusted = IsTrusted::No);
>+    virtual ~XRReferenceSpaceEvent();
>+
>+    const WebXRReferenceSpace& referenceSpace() const;
>+    const WebXRRigidTransform& transform() const;
>+
>+private:
>+    XRReferenceSpaceEvent(const AtomString&, const Init&, IsTrusted);
>+
>+    RefPtr<WebXRReferenceSpace> m_referenceSpace;
>+    RefPtr<WebXRRigidTransform> m_transform;
>+};
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/XRReferenceSpaceEvent.idl b/Source/WebCore/Modules/webxr/XRReferenceSpaceEvent.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..169c14c3583f13ef8d7cab4c8c9313d9712c2d58
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRReferenceSpaceEvent.idl
>@@ -0,0 +1,43 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBXR,
>+] dictionary XRReferenceSpaceEventInit : EventInit {
>+    required WebXRReferenceSpace referenceSpace;
>+    WebXRRigidTransform transform;
>+};
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBXR,
>+    SecureContext,
>+    Exposed=Window,
>+    Constructor(DOMString type, XRReferenceSpaceEventInit eventInitDict),
>+] interface XRReferenceSpaceEvent : Event {
>+    [SameObject] readonly attribute WebXRReferenceSpace referenceSpace;
>+    [SameObject] readonly attribute WebXRRigidTransform transform;
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRReferenceSpaceType.h b/Source/WebCore/Modules/webxr/XRReferenceSpaceType.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..0435896ab9c2406502252bd0291c550b0d9358d3
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRReferenceSpaceType.h
>@@ -0,0 +1,42 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBXR)
>+
>+namespace WebCore {
>+
>+enum class XRReferenceSpaceType {
>+    Viewer,
>+    Local,
>+    LocalFloor,
>+    BoundedFloor,
>+    Unbounded
>+};
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/XRReferenceSpaceType.idl b/Source/WebCore/Modules/webxr/XRReferenceSpaceType.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..f2996bbe90ef4dc3eeff9c3c5fbf79dc90ce5452
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRReferenceSpaceType.idl
>@@ -0,0 +1,35 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBXR
>+] enum XRReferenceSpaceType {
>+    "viewer",
>+    "local",
>+    "local-floor",
>+    "bounded-floor",
>+    "unbounded"
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRRenderStateInit.h b/Source/WebCore/Modules/webxr/XRRenderStateInit.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..707180b0e0f782c217679937b14c987b3b4f1256
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRRenderStateInit.h
>@@ -0,0 +1,44 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBXR)
>+
>+#include "WebXRWebGLLayer.h"
>+#include <wtf/RefPtr.h>
>+
>+namespace WebCore {
>+
>+struct XRRenderStateInit {
>+    double depthNear;
>+    double depthFar;
>+    double inlineVerticalFieldOfView;
>+    RefPtr<WebXRWebGLLayer> baseLayer;
>+};
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/XRRenderStateInit.idl b/Source/WebCore/Modules/webxr/XRRenderStateInit.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..a60eae4b2a9d41f94da7cb25cb099ba5e2aec118
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRRenderStateInit.idl
>@@ -0,0 +1,34 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBXR,
>+] dictionary XRRenderStateInit {
>+    double depthNear;
>+    double depthFar;
>+    double inlineVerticalFieldOfView;
>+    WebXRWebGLLayer? baseLayer;
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRSessionEvent.cpp b/Source/WebCore/Modules/webxr/XRSessionEvent.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..df8748c8a01a28deb6b5481fcc54a7c1d87e6dcd
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRSessionEvent.cpp
>@@ -0,0 +1,56 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include "config.h"
>+#include "XRSessionEvent.h"
>+
>+#if ENABLE(WEBXR)
>+
>+#include "WebXRSession.h"
>+
>+namespace WebCore {
>+
>+Ref<XRSessionEvent> XRSessionEvent::create(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
>+{
>+    return adoptRef(*new XRSessionEvent(type, initializer, isTrusted));
>+}
>+
>+XRSessionEvent::XRSessionEvent(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
>+    : Event(type, initializer, isTrusted)
>+    , m_session(initializer.session)
>+{
>+    ASSERT(m_session);
>+}
>+
>+XRSessionEvent::~XRSessionEvent() = default;
>+
>+const WebXRSession& XRSessionEvent::session() const
>+{
>+    return *m_session;
>+}
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/XRSessionEvent.h b/Source/WebCore/Modules/webxr/XRSessionEvent.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..9e8ceb4072d5ecf69af0efbe70b3f9f8644af99a
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRSessionEvent.h
>@@ -0,0 +1,55 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBXR)
>+
>+#include "Event.h"
>+
>+namespace WebCore {
>+
>+class WebXRSession;
>+
>+class XRSessionEvent final : public Event {
>+public:
>+    struct Init : EventInit {
>+        RefPtr<WebXRSession> session;
>+    };
>+
>+    static Ref<XRSessionEvent> create(const AtomString&, const Init&, IsTrusted = IsTrusted::No);
>+    virtual ~XRSessionEvent();
>+
>+    const WebXRSession& session() const;
>+
>+private:
>+    XRSessionEvent(const AtomString&, const Init&, IsTrusted);
>+
>+    RefPtr<WebXRSession> m_session;
>+};
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/XRSessionEvent.idl b/Source/WebCore/Modules/webxr/XRSessionEvent.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..471933f295e54410ed60f6390ae5c284f2bc9226
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRSessionEvent.idl
>@@ -0,0 +1,41 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBXR,
>+] dictionary XRSessionEventInit : EventInit {
>+    required WebXRSession session;
>+};
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBXR,
>+    SecureContext,
>+    Exposed=Window,
>+    Constructor(DOMString type, XRSessionEventInit eventInitDict),
>+] interface XRSessionEvent : Event {
>+    [SameObject] readonly attribute WebXRSession session;
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRSessionInit.h b/Source/WebCore/Modules/webxr/XRSessionInit.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..e62a2682296e2ed491a77b42d874000a2ceb69f3
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRSessionInit.h
>@@ -0,0 +1,46 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBXR)
>+
>+#include <JavaScriptCore/Strong.h>
>+#include <wtf/Forward.h>
>+
>+namespace JSC {
>+class JSValue;
>+}
>+
>+namespace WebCore {
>+
>+struct XRSessionInit {
>+    Vector<JSC::JSValue> requiredFeatures;
>+    Vector<JSC::JSValue> optionalFeatures;
>+};
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/XRSessionInit.idl b/Source/WebCore/Modules/webxr/XRSessionInit.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..605c0d507245d5a8379cc62595ac5519f9a0dda1
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRSessionInit.idl
>@@ -0,0 +1,32 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBXR,
>+] dictionary XRSessionInit {
>+    sequence<any> requiredFeatures;
>+    sequence<any> optionalFeatures;
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRSessionMode.h b/Source/WebCore/Modules/webxr/XRSessionMode.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..771a9da584bc0a2df4d81db098412d1f295b1f99
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRSessionMode.h
>@@ -0,0 +1,38 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBXR)
>+
>+#include "PlatformXR.h"
>+
>+namespace WebCore {
>+
>+using XRSessionMode = PlatformXR::SessionMode;
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/XRSessionMode.idl b/Source/WebCore/Modules/webxr/XRSessionMode.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..e65f606b46979a12d7c14c36b31577128d2b1c17
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRSessionMode.idl
>@@ -0,0 +1,33 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBXR
>+] enum XRSessionMode {
>+    "inline",
>+    "immersive-vr",
>+    "immersive-ar"
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRTargetRayMode.h b/Source/WebCore/Modules/webxr/XRTargetRayMode.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..1fca44e451b97c56026e145b522331f8165bae7f
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRTargetRayMode.h
>@@ -0,0 +1,40 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBXR)
>+
>+namespace WebCore {
>+
>+enum class XRTargetRayMode {
>+    Gaze,
>+    TrackedPointer,
>+    Screen,
>+};
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/XRTargetRayMode.idl b/Source/WebCore/Modules/webxr/XRTargetRayMode.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..64e5463d34cf66e68c3c21b346bbb9773abd8aab
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRTargetRayMode.idl
>@@ -0,0 +1,33 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBXR
>+] enum XRTargetRayMode {
>+    "gaze",
>+    "tracked-pointer",
>+    "screen"
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRVisibilityState.h b/Source/WebCore/Modules/webxr/XRVisibilityState.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..6fdd85978d9d01ff79362c7c0bb858d777fb291c
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRVisibilityState.h
>@@ -0,0 +1,40 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBXR)
>+
>+namespace WebCore {
>+
>+enum class XRVisibilityState {
>+    Visible,
>+    VisibleBlurred,
>+    Hidden
>+};
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/XRVisibilityState.idl b/Source/WebCore/Modules/webxr/XRVisibilityState.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..11ef27580fc198f367971c388c0f98ffc9d6fe8e
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRVisibilityState.idl
>@@ -0,0 +1,33 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBXR
>+] enum XRVisibilityState {
>+    "visible",
>+    "visible-blurred",
>+    "hidden"
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRWebGLLayerInit.h b/Source/WebCore/Modules/webxr/XRWebGLLayerInit.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..ba44d510a0ef4ec1dc8991f54f2b007dd038e7d9
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRWebGLLayerInit.h
>@@ -0,0 +1,43 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBXR)
>+
>+namespace WebCore {
>+
>+struct XRWebGLLayerInit {
>+    bool antialias { true };
>+    bool depth { true };
>+    bool stencil { false };
>+    bool alpha { true };
>+    bool ignoreDepthValues { true };
>+    double framebufferScaleFactor { 1.0 };
>+};
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebCore/Modules/webxr/XRWebGLLayerInit.idl b/Source/WebCore/Modules/webxr/XRWebGLLayerInit.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..3a436d2b5432ccf9852acadeb70d432e5a553b59
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRWebGLLayerInit.idl
>@@ -0,0 +1,36 @@
>+/*
>+ * Copyright (C) 2020 Igalia S.L. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBXR,
>+] dictionary XRWebGLLayerInit {
>+    boolean antialias = true;
>+    boolean depth = true;
>+    boolean stencil = false;
>+    boolean alpha = true;
>+    boolean ignoreDepthValues = false;
>+    double framebufferScaleFactor = 1.0;
>+};
>diff --git a/Source/WebCore/PAL/Configurations/FeatureDefines.xcconfig b/Source/WebCore/PAL/Configurations/FeatureDefines.xcconfig
>index e6a30029a01df1802ebf72f58fa8411581e801b4..cfbb7295135f01b4c7476519d4687e6c6f1be345 100644
>--- a/Source/WebCore/PAL/Configurations/FeatureDefines.xcconfig
>+++ b/Source/WebCore/PAL/Configurations/FeatureDefines.xcconfig
>@@ -394,6 +394,8 @@ ENABLE_WEBGPU_appletvos = ENABLE_WEBGPU;
> ENABLE_WEBGPU_macosx = $(ENABLE_WEBGPU$(WK_MACOS_1014));
> ENABLE_WEBGPU_MACOS_SINCE_1014 = ENABLE_WEBGPU;
> 
>+ENABLE_WEBXR = ;
>+
> ENABLE_WEB_API_STATISTICS = ;
> 
> ENABLE_WEB_AUDIO = ENABLE_WEB_AUDIO;
>@@ -414,4 +416,4 @@ ENABLE_WIRELESS_PLAYBACK_TARGET = ENABLE_WIRELESS_PLAYBACK_TARGET;
> 
> ENABLE_XSLT = ENABLE_XSLT;
> 
>-FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCESSIBILITY_ISOLATED_TREE) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLE_PAY_SESSION_V9) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_CONIC_GRADIENTS) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_PAINTING_API) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CSS_TYPED_OM) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_C_LOOP) $(ENABLE_DARK_MODE_CSS) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FULLSCREEN_API) $(ENABLE_PICTURE_IN_PICTURE_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_GPU_PROCESS) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INSPECTOR_ALTERNATE_DISPATCHERS) $(ENABLE_INSPECTOR_TELEMETRY) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_MEMORY_SAMPLER) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NETWORK_CACHE_SPECULATIVE_REVALIDATION) $(ENABLE_NETWORK_CACHE_STALE_WHILE_REVALIDATE) $(ENABLE_NOTIFICATIONS) $(ENABLE_OFFSCREEN_CANVAS) $(ENABLE_OVERFLOW_SCROLLING_TOUCH) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESIZE_OBSERVER) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_LOAD_STATISTICS) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SANDBOX_EXTENSIONS) $(ENABLE_SERVER_PRECONNECT) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SHAREABLE_RESOURCE) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USERSELECT_ALL) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEBDRIVER_MOUSE_INTERACTIONS) $(ENABLE_WEBDRIVER_KEYBOARD_INTERACTIONS) $(ENABLE_WEBDRIVER_TOUCH_INTERACTIONS) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WEB_API_STATISTICS) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_CRYPTO) $(ENABLE_WEB_RTC) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>+FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCESSIBILITY_ISOLATED_TREE) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLE_PAY_SESSION_V9) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_CONIC_GRADIENTS) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_PAINTING_API) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CSS_TYPED_OM) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_C_LOOP) $(ENABLE_DARK_MODE_CSS) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FULLSCREEN_API) $(ENABLE_PICTURE_IN_PICTURE_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_GPU_PROCESS) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INSPECTOR_ALTERNATE_DISPATCHERS) $(ENABLE_INSPECTOR_TELEMETRY) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_MEMORY_SAMPLER) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NETWORK_CACHE_SPECULATIVE_REVALIDATION) $(ENABLE_NETWORK_CACHE_STALE_WHILE_REVALIDATE) $(ENABLE_NOTIFICATIONS) $(ENABLE_OFFSCREEN_CANVAS) $(ENABLE_OVERFLOW_SCROLLING_TOUCH) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESIZE_OBSERVER) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_LOAD_STATISTICS) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SANDBOX_EXTENSIONS) $(ENABLE_SERVER_PRECONNECT) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SHAREABLE_RESOURCE) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USERSELECT_ALL) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEBDRIVER_MOUSE_INTERACTIONS) $(ENABLE_WEBDRIVER_KEYBOARD_INTERACTIONS) $(ENABLE_WEBDRIVER_TOUCH_INTERACTIONS) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WEBXR) $(ENABLE_WEB_API_STATISTICS) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_CRYPTO) $(ENABLE_WEB_RTC) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>diff --git a/Source/WebCore/PlatformWPE.cmake b/Source/WebCore/PlatformWPE.cmake
>index 0d5982e1dc69eb680f08debd8e6f26a7247d9da5..e75ecef140ab5ceef1d0d6dbc066e35c92d3f592 100644
>--- a/Source/WebCore/PlatformWPE.cmake
>+++ b/Source/WebCore/PlatformWPE.cmake
>@@ -70,3 +70,8 @@ list(APPEND WebCore_SYSTEM_INCLUDE_DIRECTORIES
>     ${UPOWERGLIB_INCLUDE_DIRS}
>     ${WPEBACKEND_FDO_INCLUDE_DIRS}
> )
>+
>+if (USE_OPENXR)
>+    list(APPEND WebCore_LIBRARIES ${OPENXR_LIBRARIES})
>+    list(APPEND WebCore_SYSTEM_INCLUDE_DIRECTORIES ${OPENXR_INCLUDE_DIRS})
>+endif ()
>\ No newline at end of file
>diff --git a/Source/WebCore/Sources.txt b/Source/WebCore/Sources.txt
>index 778263e4a0b31731e3b5f6481089c1d0e3185480..401cad4aa5f42b63b4590c50e48435513e9dfdb7 100644
>--- a/Source/WebCore/Sources.txt
>+++ b/Source/WebCore/Sources.txt
>@@ -411,6 +411,31 @@ Modules/webgpu/WebGPUTexture.cpp
> Modules/webgpu/WebGPUTextureView.cpp
> Modules/webgpu/WorkerNavigatorGPU.cpp
> 
>+#if ENABLE_WEBXR
>+
>+Modules/webxr/NavigatorWebXR.cpp @no-unify
>+Modules/webxr/WebXRBoundedReferenceSpace.cpp @no-unify
>+Modules/webxr/WebXRFrame.cpp @no-unify
>+Modules/webxr/WebXRInputSourceArray.cpp @no-unify
>+Modules/webxr/WebXRInputSource.cpp @no-unify
>+Modules/webxr/WebXRPose.cpp @no-unify
>+Modules/webxr/WebXRReferenceSpace.cpp @no-unify
>+Modules/webxr/WebXRRenderState.cpp @no-unify
>+Modules/webxr/WebXRRigidTransform.cpp @no-unify
>+Modules/webxr/WebXRSession.cpp @no-unify
>+Modules/webxr/WebXRSpace.cpp @no-unify
>+Modules/webxr/WebXRSystem.cpp @no-unify
>+Modules/webxr/WebXRView.cpp @no-unify
>+Modules/webxr/WebXRViewerPose.cpp @no-unify
>+Modules/webxr/WebXRViewport.cpp @no-unify
>+Modules/webxr/WebXRWebGLLayer.cpp @no-unify
>+Modules/webxr/XRInputSourceEvent.cpp @no-unify
>+Modules/webxr/XRInputSourcesChangeEvent.cpp @no-unify
>+Modules/webxr/XRReferenceSpaceEvent.cpp @no-unify
>+Modules/webxr/XRSessionEvent.cpp @no-unify
>+
>+#endif
>+
> accessibility/AXObjectCache.cpp
> accessibility/AccessibilityARIAGrid.cpp
> accessibility/AccessibilityARIAGridCell.cpp
>@@ -2077,6 +2102,9 @@ platform/text/TextEncoding.cpp
> platform/text/TextEncodingDetectorICU.cpp
> platform/text/TextEncodingRegistry.cpp
> 
>+platform/xr/PlatformXR.cpp @no-unify
>+platform/xr/openxr/PlatformXR.cpp @no-unify
>+
> plugins/DOMMimeType.cpp
> plugins/DOMMimeTypeArray.cpp
> plugins/DOMPlugin.cpp
>@@ -3524,6 +3552,41 @@ JSXPathNSResolver.cpp
> JSXPathResult.cpp
> JSXSLTProcessor.cpp
> 
>+#if ENABLE_WEBGL
>+
>+JSWebXRBoundedReferenceSpace.cpp
>+JSXREnvironmentBlendMode.cpp
>+JSXREye.cpp
>+JSWebXRFrame.cpp
>+JSXRFrameRequestCallback.cpp
>+JSXRHandedness.cpp
>+JSWebXRInputSource.cpp
>+JSWebXRInputSourceArray.cpp
>+JSXRInputSourceEvent.cpp
>+JSXRInputSourcesChangeEvent.cpp
>+JSWebXRPose.cpp
>+JSWebXRReferenceSpace.cpp
>+JSXRReferenceSpaceEvent.cpp
>+JSXRReferenceSpaceType.cpp
>+JSWebXRRenderState.cpp
>+JSXRRenderStateInit.cpp
>+JSWebXRRigidTransform.cpp
>+JSWebXRSession.cpp
>+JSXRSessionEvent.cpp
>+JSXRSessionInit.cpp
>+JSXRSessionMode.cpp
>+JSWebXRSpace.cpp
>+JSWebXRSystem.cpp
>+JSXRTargetRayMode.cpp
>+JSWebXRView.cpp
>+JSWebXRViewerPose.cpp
>+JSWebXRViewport.cpp
>+JSXRVisibilityState.cpp
>+JSWebXRWebGLLayer.cpp
>+JSXRWebGLLayerInit.cpp
>+
>+#endif
>+
> #if ENABLE_GAMEPAD
> 
> JSGamepad.cpp
>diff --git a/Source/WebCore/WebCore.xcodeproj/project.pbxproj b/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>index 73f3a9f8b65e3d17d98cda2fdfd2026f5e209114..86ae8589a51b8ca3fdd6952429635dbef1e31a68 100644
>--- a/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>+++ b/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>@@ -4816,6 +4816,60 @@
> 		E1E6EEA80B628DB3005F2F70 /* JSHTMLSelectElement.h in Headers */ = {isa = PBXBuildFile; fileRef = E1E6EEA70B628DB3005F2F70 /* JSHTMLSelectElement.h */; };
> 		E1EC29A00BB04C6B00EA187B /* XPathNodeSet.h in Headers */ = {isa = PBXBuildFile; fileRef = E1EC299E0BB04C6B00EA187B /* XPathNodeSet.h */; settings = {ATTRIBUTES = (Private, ); }; };
> 		E1ED8AC30CC49BE000BFC557 /* CSSPrimitiveValueMappings.h in Headers */ = {isa = PBXBuildFile; fileRef = E1ED8AC20CC49BE000BFC557 /* CSSPrimitiveValueMappings.h */; settings = {ATTRIBUTES = (Private, ); }; };
>+		E1EE8B702412B2A800E794D6 /* PlatformXR.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E1EE8B6C2412B2A700E794D6 /* PlatformXR.cpp */; };
>+		E1EE8B712412B2A800E794D6 /* PlatformXR.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E1EE8B6E2412B2A700E794D6 /* PlatformXR.cpp */; };
>+		E1EE8B722412B2A800E794D6 /* PlatformXR.h in Headers */ = {isa = PBXBuildFile; fileRef = E1EE8B6F2412B2A700E794D6 /* PlatformXR.h */; };
>+		E1EE8B762413191F00E794D6 /* WebXRViewerPose.h in Headers */ = {isa = PBXBuildFile; fileRef = E1EE8AC72412B16F00E794D6 /* WebXRViewerPose.h */; };
>+		E1EE8B772413191F00E794D6 /* XRReferenceSpaceType.h in Headers */ = {isa = PBXBuildFile; fileRef = E1EE8AC92412B17000E794D6 /* XRReferenceSpaceType.h */; };
>+		E1EE8B782413191F00E794D6 /* NavigatorWebXR.h in Headers */ = {isa = PBXBuildFile; fileRef = E1EE8ACA2412B17000E794D6 /* NavigatorWebXR.h */; };
>+		E1EE8B792413191F00E794D6 /* XRRenderStateInit.h in Headers */ = {isa = PBXBuildFile; fileRef = E1EE8ACB2412B17000E794D6 /* XRRenderStateInit.h */; };
>+		E1EE8B7A2413191F00E794D6 /* XRInputSourceEvent.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E1EE8ACC2412B17000E794D6 /* XRInputSourceEvent.cpp */; };
>+		E1EE8B7B2413191F00E794D6 /* WebXRRigidTransform.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E1EE8ACD2412B17000E794D6 /* WebXRRigidTransform.cpp */; };
>+		E1EE8B7C2413191F00E794D6 /* WebXRRenderState.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E1EE8ACE2412B17000E794D6 /* WebXRRenderState.cpp */; };
>+		E1EE8B7D2413191F00E794D6 /* WebXRSpace.h in Headers */ = {isa = PBXBuildFile; fileRef = E1EE8ACF2412B17000E794D6 /* WebXRSpace.h */; };
>+		E1EE8B7E2413191F00E794D6 /* WebXRBoundedReferenceSpace.h in Headers */ = {isa = PBXBuildFile; fileRef = E1EE8AD12412B17000E794D6 /* WebXRBoundedReferenceSpace.h */; };
>+		E1EE8B7F2413191F00E794D6 /* WebXRReferenceSpace.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E1EE8AD22412B17000E794D6 /* WebXRReferenceSpace.cpp */; };
>+		E1EE8B802413191F00E794D6 /* WebXRBoundedReferenceSpace.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E1EE8AD32412B17000E794D6 /* WebXRBoundedReferenceSpace.cpp */; };
>+		E1EE8B812413191F00E794D6 /* WebXRRenderState.h in Headers */ = {isa = PBXBuildFile; fileRef = E1EE8AD52412B17000E794D6 /* WebXRRenderState.h */; };
>+		E1EE8B822413191F00E794D6 /* XRVisibilityState.h in Headers */ = {isa = PBXBuildFile; fileRef = E1EE8AD62412B17000E794D6 /* XRVisibilityState.h */; };
>+		E1EE8B832413191F00E794D6 /* WebXRWebGLLayer.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E1EE8AD82412B17000E794D6 /* WebXRWebGLLayer.cpp */; };
>+		E1EE8B842413191F00E794D6 /* XRReferenceSpaceEvent.h in Headers */ = {isa = PBXBuildFile; fileRef = E1EE8ADB2412B17000E794D6 /* XRReferenceSpaceEvent.h */; };
>+		E1EE8B852413191F00E794D6 /* XRSessionEvent.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E1EE8ADC2412B17000E794D6 /* XRSessionEvent.cpp */; };
>+		E1EE8B862413191F00E794D6 /* WebXRInputSourceArray.h in Headers */ = {isa = PBXBuildFile; fileRef = E1EE8ADD2412B17000E794D6 /* WebXRInputSourceArray.h */; };
>+		E1EE8B872413191F00E794D6 /* WebXRView.h in Headers */ = {isa = PBXBuildFile; fileRef = E1EE8AE02412B17000E794D6 /* WebXRView.h */; };
>+		E1EE8B882413191F00E794D6 /* WebXRPose.h in Headers */ = {isa = PBXBuildFile; fileRef = E1EE8AE12412B17000E794D6 /* WebXRPose.h */; };
>+		E1EE8B892413191F00E794D6 /* WebXRSystem.h in Headers */ = {isa = PBXBuildFile; fileRef = E1EE8AE22412B17000E794D6 /* WebXRSystem.h */; };
>+		E1EE8B8A2413191F00E794D6 /* WebXRFrame.h in Headers */ = {isa = PBXBuildFile; fileRef = E1EE8AE32412B17000E794D6 /* WebXRFrame.h */; };
>+		E1EE8B8B2413191F00E794D6 /* WebXRPose.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E1EE8AE52412B17000E794D6 /* WebXRPose.cpp */; };
>+		E1EE8B8C2413191F00E794D6 /* WebXRInputSourceArray.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E1EE8AE62412B17000E794D6 /* WebXRInputSourceArray.cpp */; };
>+		E1EE8B8D2413195000E794D6 /* XRSessionEvent.h in Headers */ = {isa = PBXBuildFile; fileRef = E1EE8AE72412B17000E794D6 /* XRSessionEvent.h */; };
>+		E1EE8B8E2413195000E794D6 /* WebXRSystem.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E1EE8AE82412B17000E794D6 /* WebXRSystem.cpp */; };
>+		E1EE8B8F2413195000E794D6 /* XRFrameRequestCallback.h in Headers */ = {isa = PBXBuildFile; fileRef = E1EE8AE92412B17000E794D6 /* XRFrameRequestCallback.h */; };
>+		E1EE8B902413195000E794D6 /* XRTargetRayMode.h in Headers */ = {isa = PBXBuildFile; fileRef = E1EE8AEA2412B17000E794D6 /* XRTargetRayMode.h */; };
>+		E1EE8B912413195000E794D6 /* WebXRViewport.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E1EE8AEB2412B17000E794D6 /* WebXRViewport.cpp */; };
>+		E1EE8B922413195000E794D6 /* XRHandedness.h in Headers */ = {isa = PBXBuildFile; fileRef = E1EE8AEE2412B17000E794D6 /* XRHandedness.h */; };
>+		E1EE8B932413195000E794D6 /* WebXRFrame.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E1EE8AF02412B17000E794D6 /* WebXRFrame.cpp */; };
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>+		E1EE8B9A2413195000E794D6 /* XRSessionMode.h in Headers */ = {isa = PBXBuildFile; fileRef = E1EE8AFE2412B17000E794D6 /* XRSessionMode.h */; };
>+		E1EE8B9B2413195000E794D6 /* XRWebGLLayer.h in Headers */ = {isa = PBXBuildFile; fileRef = E1EE8B042412B17000E794D6 /* XRWebGLLayer.h */; };
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>+		E1EE8BA02413195000E794D6 /* WebXRViewerPose.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E1EE8B0B2412B17000E794D6 /* WebXRViewerPose.cpp */; };
>+		E1EE8BA12413196300E794D6 /* WebXRInputSource.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E1EE8B0D2412B17000E794D6 /* WebXRInputSource.cpp */; };
>+		E1EE8BA22413196300E794D6 /* WebXRSession.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E1EE8B0F2412B17000E794D6 /* WebXRSession.cpp */; };
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>+		E1EE8BA42413196300E794D6 /* WebXRView.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E1EE8B122412B17000E794D6 /* WebXRView.cpp */; };
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>+		E1EE8BA62413196300E794D6 /* WebXRReferenceSpace.h in Headers */ = {isa = PBXBuildFile; fileRef = E1EE8B142412B17000E794D6 /* WebXRReferenceSpace.h */; };
>+		E1EE8BA72413196300E794D6 /* XRInputSourcesChangeEvent.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E1EE8B152412B17000E794D6 /* XRInputSourcesChangeEvent.cpp */; };
>+		E1EE8BA82413196300E794D6 /* WebXRInputSource.h in Headers */ = {isa = PBXBuildFile; fileRef = E1EE8B172412B17000E794D6 /* WebXRInputSource.h */; };
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> 		E1F80B8E183172B5007885C3 /* JSCryptoKeyPair.h in Headers */ = {isa = PBXBuildFile; fileRef = E1F80B8C183172B5007885C3 /* JSCryptoKeyPair.h */; };
>@@ -15154,6 +15208,91 @@
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> 		E1EC299E0BB04C6B00EA187B /* XPathNodeSet.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = XPathNodeSet.h; sourceTree = "<group>"; };
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>+		E1EE8AC72412B16F00E794D6 /* WebXRViewerPose.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WebXRViewerPose.h; sourceTree = "<group>"; };
>+		E1EE8AC82412B16F00E794D6 /* XRSessionMode.idl */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = XRSessionMode.idl; sourceTree = "<group>"; };
>+		E1EE8AC92412B17000E794D6 /* XRReferenceSpaceType.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = XRReferenceSpaceType.h; sourceTree = "<group>"; };
>+		E1EE8ACA2412B17000E794D6 /* NavigatorWebXR.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = NavigatorWebXR.h; sourceTree = "<group>"; };
>+		E1EE8ACB2412B17000E794D6 /* XRRenderStateInit.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = XRRenderStateInit.h; sourceTree = "<group>"; };
>+		E1EE8ACC2412B17000E794D6 /* XRInputSourceEvent.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = XRInputSourceEvent.cpp; sourceTree = "<group>"; };
>+		E1EE8ACD2412B17000E794D6 /* WebXRRigidTransform.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = WebXRRigidTransform.cpp; sourceTree = "<group>"; };
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>+		E1EE8AD02412B17000E794D6 /* XRReferenceSpaceEvent.idl */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = XRReferenceSpaceEvent.idl; sourceTree = "<group>"; };
>+		E1EE8AD12412B17000E794D6 /* WebXRBoundedReferenceSpace.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WebXRBoundedReferenceSpace.h; sourceTree = "<group>"; };
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>+		E1EE8AD32412B17000E794D6 /* WebXRBoundedReferenceSpace.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = WebXRBoundedReferenceSpace.cpp; sourceTree = "<group>"; };
>+		E1EE8AD42412B17000E794D6 /* XRSpace.idl */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = XRSpace.idl; sourceTree = "<group>"; };
>+		E1EE8AD52412B17000E794D6 /* WebXRRenderState.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WebXRRenderState.h; sourceTree = "<group>"; };
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>+		E1EE8AD72412B17000E794D6 /* XRSessionInit.idl */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = XRSessionInit.idl; sourceTree = "<group>"; };
>+		E1EE8AD82412B17000E794D6 /* WebXRWebGLLayer.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = WebXRWebGLLayer.cpp; sourceTree = "<group>"; };
>+		E1EE8AD92412B17000E794D6 /* XRVisibilityState.idl */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = XRVisibilityState.idl; sourceTree = "<group>"; };
>+		E1EE8ADA2412B17000E794D6 /* XREnvironmentBlendMode.idl */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = XREnvironmentBlendMode.idl; sourceTree = "<group>"; };
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>+		E1EE8ADC2412B17000E794D6 /* XRSessionEvent.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = XRSessionEvent.cpp; sourceTree = "<group>"; };
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>+		E1EE8ADF2412B17000E794D6 /* XRView.idl */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = XRView.idl; sourceTree = "<group>"; };
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>+		E1EE8AE52412B17000E794D6 /* WebXRPose.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = WebXRPose.cpp; sourceTree = "<group>"; };
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>+		E1EE8AEB2412B17000E794D6 /* WebXRViewport.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = WebXRViewport.cpp; sourceTree = "<group>"; };
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>+		E1EE8AF82412B17000E794D6 /* WebXRSpace.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = WebXRSpace.cpp; sourceTree = "<group>"; };
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>+		E1EE8AFB2412B17000E794D6 /* XRFrameRequestCallback.idl */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = XRFrameRequestCallback.idl; sourceTree = "<group>"; };
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>+		E1EE8B022412B17000E794D6 /* XRSystem.idl */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = XRSystem.idl; sourceTree = "<group>"; };
>+		E1EE8B032412B17000E794D6 /* XREye.idl */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = XREye.idl; sourceTree = "<group>"; };
>+		E1EE8B042412B17000E794D6 /* XRWebGLLayer.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = XRWebGLLayer.h; sourceTree = "<group>"; };
>+		E1EE8B052412B17000E794D6 /* XREnvironmentBlendMode.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = XREnvironmentBlendMode.h; sourceTree = "<group>"; };
>+		E1EE8B062412B17000E794D6 /* WebXRRigidTransform.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WebXRRigidTransform.h; sourceTree = "<group>"; };
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>+		E1EE8B082412B17000E794D6 /* XRWebGLLayerInit.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = XRWebGLLayerInit.h; sourceTree = "<group>"; };
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>+		E1EE8B0A2412B17000E794D6 /* XRViewport.idl */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = XRViewport.idl; sourceTree = "<group>"; };
>+		E1EE8B0B2412B17000E794D6 /* WebXRViewerPose.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = WebXRViewerPose.cpp; sourceTree = "<group>"; };
>+		E1EE8B0C2412B17000E794D6 /* XRFrame.idl */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = XRFrame.idl; sourceTree = "<group>"; };
>+		E1EE8B0D2412B17000E794D6 /* WebXRInputSource.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = WebXRInputSource.cpp; sourceTree = "<group>"; };
>+		E1EE8B0E2412B17000E794D6 /* NavigatorWebXR.idl */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = NavigatorWebXR.idl; sourceTree = "<group>"; };
>+		E1EE8B0F2412B17000E794D6 /* WebXRSession.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = WebXRSession.cpp; sourceTree = "<group>"; };
>+		E1EE8B102412B17000E794D6 /* XRWebGLLayerInit.idl */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = XRWebGLLayerInit.idl; sourceTree = "<group>"; };
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>+		E1EE8B122412B17000E794D6 /* WebXRView.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = WebXRView.cpp; sourceTree = "<group>"; };
>+		E1EE8B132412B17000E794D6 /* XRSessionInit.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = XRSessionInit.h; sourceTree = "<group>"; };
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>+		E1EE8B152412B17000E794D6 /* XRInputSourcesChangeEvent.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = XRInputSourcesChangeEvent.cpp; sourceTree = "<group>"; };
>+		E1EE8B162412B17000E794D6 /* XRPose.idl */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = XRPose.idl; sourceTree = "<group>"; };
>+		E1EE8B172412B17000E794D6 /* WebXRInputSource.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WebXRInputSource.h; sourceTree = "<group>"; };
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>+		E1EE8B6C2412B2A700E794D6 /* PlatformXR.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = PlatformXR.cpp; sourceTree = "<group>"; };
>+		E1EE8B6E2412B2A700E794D6 /* PlatformXR.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = PlatformXR.cpp; sourceTree = "<group>"; };
>+		E1EE8B6F2412B2A700E794D6 /* PlatformXR.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = PlatformXR.h; sourceTree = "<group>"; };
> 		E1F1E82D0C3C2BB9006DB391 /* XSLTExtensions.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = XSLTExtensions.cpp; sourceTree = "<group>"; };
> 		E1F1E82E0C3C2BB9006DB391 /* XSLTExtensions.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = XSLTExtensions.h; sourceTree = "<group>"; };
> 		E1F80B8418317247007885C3 /* CryptoKeyPair.idl */ = {isa = PBXFileReference; lastKnownFileType = text; path = CryptoKeyPair.idl; sourceTree = "<group>"; };
>@@ -22394,6 +22533,7 @@
> 				996E59DA1DF00D45006612B9 /* webdriver */,
> 				D00F593E216ECC43000D71DB /* webgpu */,
> 				97AABCF714FA09B5007457AE /* websockets */,
>+				E1EE8AC62412B16F00E794D6 /* webxr */,
> 			);
> 			path = Modules;
> 			sourceTree = "<group>";
>@@ -25944,6 +26084,7 @@
> 				656B84D70AEA1CE900A095B4 /* network */,
> 				1A2E6E560CC551E0004A2062 /* sql */,
> 				B2C3D9EC0D006C1D00EF6F26 /* text */,
>+				E1EE8B6B2412B2A700E794D6 /* xr */,
> 				DFDB912CF8E88A6DA1AD264F /* AbortableTaskQueue.h */,
> 				49AE2D94134EE5F90072920A /* CalculationValue.cpp */,
> 				49AE2D95134EE5F90072920A /* CalculationValue.h */,
>@@ -27036,6 +27177,113 @@
> 			name = Threads;
> 			sourceTree = "<group>";
> 		};
>+		E1EE8AC62412B16F00E794D6 /* webxr */ = {
>+			isa = PBXGroup;
>+			children = (
>+				E1EE8AF12412B17000E794D6 /* NavigatorWebXR.cpp */,
>+				E1EE8ACA2412B17000E794D6 /* NavigatorWebXR.h */,
>+				E1EE8B0E2412B17000E794D6 /* NavigatorWebXR.idl */,
>+				E1EE8AD32412B17000E794D6 /* WebXRBoundedReferenceSpace.cpp */,
>+				E1EE8AD12412B17000E794D6 /* WebXRBoundedReferenceSpace.h */,
>+				E1EE8AF02412B17000E794D6 /* WebXRFrame.cpp */,
>+				E1EE8AE32412B17000E794D6 /* WebXRFrame.h */,
>+				E1EE8B0D2412B17000E794D6 /* WebXRInputSource.cpp */,
>+				E1EE8B172412B17000E794D6 /* WebXRInputSource.h */,
>+				E1EE8AE62412B17000E794D6 /* WebXRInputSourceArray.cpp */,
>+				E1EE8ADD2412B17000E794D6 /* WebXRInputSourceArray.h */,
>+				E1EE8AE52412B17000E794D6 /* WebXRPose.cpp */,
>+				E1EE8AE12412B17000E794D6 /* WebXRPose.h */,
>+				E1EE8AD22412B17000E794D6 /* WebXRReferenceSpace.cpp */,
>+				E1EE8B142412B17000E794D6 /* WebXRReferenceSpace.h */,
>+				E1EE8ACE2412B17000E794D6 /* WebXRRenderState.cpp */,
>+				E1EE8AD52412B17000E794D6 /* WebXRRenderState.h */,
>+				E1EE8ACD2412B17000E794D6 /* WebXRRigidTransform.cpp */,
>+				E1EE8B062412B17000E794D6 /* WebXRRigidTransform.h */,
>+				E1EE8B0F2412B17000E794D6 /* WebXRSession.cpp */,
>+				E1EE8B112412B17000E794D6 /* WebXRSession.h */,
>+				E1EE8AF82412B17000E794D6 /* WebXRSpace.cpp */,
>+				E1EE8ACF2412B17000E794D6 /* WebXRSpace.h */,
>+				E1EE8AE82412B17000E794D6 /* WebXRSystem.cpp */,
>+				E1EE8AE22412B17000E794D6 /* WebXRSystem.h */,
>+				E1EE8B122412B17000E794D6 /* WebXRView.cpp */,
>+				E1EE8AE02412B17000E794D6 /* WebXRView.h */,
>+				E1EE8B0B2412B17000E794D6 /* WebXRViewerPose.cpp */,
>+				E1EE8AC72412B16F00E794D6 /* WebXRViewerPose.h */,
>+				E1EE8AEB2412B17000E794D6 /* WebXRViewport.cpp */,
>+				E1EE8AF42412B17000E794D6 /* WebXRViewport.h */,
>+				E1EE8AD82412B17000E794D6 /* WebXRWebGLLayer.cpp */,
>+				E1EE8AF72412B17000E794D6 /* XRBoundedReferenceSpace.idl */,
>+				E1EE8B052412B17000E794D6 /* XREnvironmentBlendMode.h */,
>+				E1EE8ADA2412B17000E794D6 /* XREnvironmentBlendMode.idl */,
>+				E1EE8AF52412B17000E794D6 /* XREye.h */,
>+				E1EE8B032412B17000E794D6 /* XREye.idl */,
>+				E1EE8B0C2412B17000E794D6 /* XRFrame.idl */,
>+				E1EE8AE92412B17000E794D6 /* XRFrameRequestCallback.h */,
>+				E1EE8AFB2412B17000E794D6 /* XRFrameRequestCallback.idl */,
>+				E1EE8AEE2412B17000E794D6 /* XRHandedness.h */,
>+				E1EE8B072412B17000E794D6 /* XRHandedness.idl */,
>+				E1EE8AEF2412B17000E794D6 /* XRInputSource.idl */,
>+				E1EE8B182412B17000E794D6 /* XRInputSourceArray.idl */,
>+				E1EE8ACC2412B17000E794D6 /* XRInputSourceEvent.cpp */,
>+				E1EE8B092412B17000E794D6 /* XRInputSourceEvent.h */,
>+				E1EE8B002412B17000E794D6 /* XRInputSourceEvent.idl */,
>+				E1EE8B152412B17000E794D6 /* XRInputSourcesChangeEvent.cpp */,
>+				E1EE8AF92412B17000E794D6 /* XRInputSourcesChangeEvent.h */,
>+				E1EE8AE42412B17000E794D6 /* XRInputSourcesChangeEvent.idl */,
>+				E1EE8B162412B17000E794D6 /* XRPose.idl */,
>+				E1EE8AF62412B17000E794D6 /* XRReferenceSpace.idl */,
>+				E1EE8AF32412B17000E794D6 /* XRReferenceSpaceEvent.cpp */,
>+				E1EE8ADB2412B17000E794D6 /* XRReferenceSpaceEvent.h */,
>+				E1EE8AD02412B17000E794D6 /* XRReferenceSpaceEvent.idl */,
>+				E1EE8AC92412B17000E794D6 /* XRReferenceSpaceType.h */,
>+				E1EE8AFA2412B17000E794D6 /* XRReferenceSpaceType.idl */,
>+				E1EE8AF22412B17000E794D6 /* XRRenderState.idl */,
>+				E1EE8ACB2412B17000E794D6 /* XRRenderStateInit.h */,
>+				E1EE8AEC2412B17000E794D6 /* XRRenderStateInit.idl */,
>+				E1EE8B012412B17000E794D6 /* XRRigidTransform.idl */,
>+				E1EE8ADE2412B17000E794D6 /* XRSession.idl */,
>+				E1EE8ADC2412B17000E794D6 /* XRSessionEvent.cpp */,
>+				E1EE8AE72412B17000E794D6 /* XRSessionEvent.h */,
>+				E1EE8AFD2412B17000E794D6 /* XRSessionEvent.idl */,
>+				E1EE8B132412B17000E794D6 /* XRSessionInit.h */,
>+				E1EE8AD72412B17000E794D6 /* XRSessionInit.idl */,
>+				E1EE8AFE2412B17000E794D6 /* XRSessionMode.h */,
>+				E1EE8AC82412B16F00E794D6 /* XRSessionMode.idl */,
>+				E1EE8AD42412B17000E794D6 /* XRSpace.idl */,
>+				E1EE8B022412B17000E794D6 /* XRSystem.idl */,
>+				E1EE8AEA2412B17000E794D6 /* XRTargetRayMode.h */,
>+				E1EE8AFF2412B17000E794D6 /* XRTargetRayMode.idl */,
>+				E1EE8ADF2412B17000E794D6 /* XRView.idl */,
>+				E1EE8AED2412B17000E794D6 /* XRViewerPose.idl */,
>+				E1EE8B0A2412B17000E794D6 /* XRViewport.idl */,
>+				E1EE8AD62412B17000E794D6 /* XRVisibilityState.h */,
>+				E1EE8AD92412B17000E794D6 /* XRVisibilityState.idl */,
>+				E1EE8B042412B17000E794D6 /* XRWebGLLayer.h */,
>+				E1EE8AFC2412B17000E794D6 /* XRWebGLLayer.idl */,
>+				E1EE8B082412B17000E794D6 /* XRWebGLLayerInit.h */,
>+				E1EE8B102412B17000E794D6 /* XRWebGLLayerInit.idl */,
>+			);
>+			path = webxr;
>+			sourceTree = "<group>";
>+		};
>+		E1EE8B6B2412B2A700E794D6 /* xr */ = {
>+			isa = PBXGroup;
>+			children = (
>+				E1EE8B6D2412B2A700E794D6 /* openxr */,
>+				E1EE8B6C2412B2A700E794D6 /* PlatformXR.cpp */,
>+				E1EE8B6F2412B2A700E794D6 /* PlatformXR.h */,
>+			);
>+			path = xr;
>+			sourceTree = "<group>";
>+		};
>+		E1EE8B6D2412B2A700E794D6 /* openxr */ = {
>+			isa = PBXGroup;
>+			children = (
>+				E1EE8B6E2412B2A700E794D6 /* PlatformXR.cpp */,
>+			);
>+			path = openxr;
>+			sourceTree = "<group>";
>+		};
> 		E1F0424309839389006694EA /* xml */ = {
> 			isa = PBXGroup;
> 			children = (
>@@ -31713,6 +31961,7 @@
> 				6B507A24234BF34100BE7C62 /* NavigatorIsLoggedIn.h in Headers */,
> 				5EA725D61ACABD5700EAD17B /* NavigatorMediaDevices.h in Headers */,
> 				996E59DF1DF0128D006612B9 /* NavigatorWebDriver.h in Headers */,
>+				E1EE8B782413191F00E794D6 /* NavigatorWebXR.h in Headers */,
> 				8A309C9F123950BE00CB9204 /* NestingLevelIncrementer.h in Headers */,
> 				656D37430ADBA5DE00A4554D /* NetscapePlugInStreamLoader.h in Headers */,
> 				A19D934B1AA11B1E00B46C24 /* NetworkExtensionContentFilter.h in Headers */,
>@@ -31927,6 +32176,7 @@
> 				074E82BB18A69F0E007EF54C /* PlatformTimeRanges.h in Headers */,
> 				52B0D4BE1C57FD1E0077CE53 /* PlatformView.h in Headers */,
> 				935C476B09AC4D4F00A6AAB4 /* PlatformWheelEvent.h in Headers */,
>+				E1EE8B722412B2A800E794D6 /* PlatformXR.h in Headers */,
> 				712BE4801FE864A7002031CC /* PlaybackDirection.h in Headers */,
> 				CDA29A091CBD99F400901CCF /* PlaybackSessionInterface.h in Headers */,
> 				CDA29A321CC01A9500901CCF /* PlaybackSessionInterfaceAVKit.h in Headers */,
>@@ -33172,6 +33422,20 @@
> 				5D21A80313ECE5DF00BB7064 /* WebVTTParser.h in Headers */,
> 				B10B6980140C174000BC1C26 /* WebVTTToken.h in Headers */,
> 				B10B6982140C174000BC1C26 /* WebVTTTokenizer.h in Headers */,
>+				E1EE8B7E2413191F00E794D6 /* WebXRBoundedReferenceSpace.h in Headers */,
>+				E1EE8B8A2413191F00E794D6 /* WebXRFrame.h in Headers */,
>+				E1EE8BA82413196300E794D6 /* WebXRInputSource.h in Headers */,
>+				E1EE8B862413191F00E794D6 /* WebXRInputSourceArray.h in Headers */,
>+				E1EE8B882413191F00E794D6 /* WebXRPose.h in Headers */,
>+				E1EE8BA62413196300E794D6 /* WebXRReferenceSpace.h in Headers */,
>+				E1EE8B812413191F00E794D6 /* WebXRRenderState.h in Headers */,
>+				E1EE8B9D2413195000E794D6 /* WebXRRigidTransform.h in Headers */,
>+				E1EE8BA32413196300E794D6 /* WebXRSession.h in Headers */,
>+				E1EE8B7D2413191F00E794D6 /* WebXRSpace.h in Headers */,
>+				E1EE8B892413191F00E794D6 /* WebXRSystem.h in Headers */,
>+				E1EE8B872413191F00E794D6 /* WebXRView.h in Headers */,
>+				E1EE8B762413191F00E794D6 /* WebXRViewerPose.h in Headers */,
>+				E1EE8B962413195000E794D6 /* WebXRViewport.h in Headers */,
> 				F55B3DE01251F12D003EF269 /* WeekInputType.h in Headers */,
> 				85031B510A44EFC700F992E0 /* WheelEvent.h in Headers */,
> 				2EBBC3D81B65988300F5253D /* WheelEventDeltaFilter.h in Headers */,
>@@ -33268,6 +33532,22 @@
> 				1AB7FC840A8B92EC00D9D37B /* XPathUtil.h in Headers */,
> 				1AB7FC860A8B92EC00D9D37B /* XPathValue.h in Headers */,
> 				1AB7FC880A8B92EC00D9D37B /* XPathVariableReference.h in Headers */,
>+				E1EE8B9C2413195000E794D6 /* XREnvironmentBlendMode.h in Headers */,
>+				E1EE8B972413195000E794D6 /* XREye.h in Headers */,
>+				E1EE8B8F2413195000E794D6 /* XRFrameRequestCallback.h in Headers */,
>+				E1EE8B922413195000E794D6 /* XRHandedness.h in Headers */,
>+				E1EE8B9F2413195000E794D6 /* XRInputSourceEvent.h in Headers */,
>+				E1EE8B992413195000E794D6 /* XRInputSourcesChangeEvent.h in Headers */,
>+				E1EE8B842413191F00E794D6 /* XRReferenceSpaceEvent.h in Headers */,
>+				E1EE8B772413191F00E794D6 /* XRReferenceSpaceType.h in Headers */,
>+				E1EE8B792413191F00E794D6 /* XRRenderStateInit.h in Headers */,
>+				E1EE8B8D2413195000E794D6 /* XRSessionEvent.h in Headers */,
>+				E1EE8BA52413196300E794D6 /* XRSessionInit.h in Headers */,
>+				E1EE8B9A2413195000E794D6 /* XRSessionMode.h in Headers */,
>+				E1EE8B902413195000E794D6 /* XRTargetRayMode.h in Headers */,
>+				E1EE8B822413191F00E794D6 /* XRVisibilityState.h in Headers */,
>+				E1EE8B9B2413195000E794D6 /* XRWebGLLayer.h in Headers */,
>+				E1EE8B9E2413195000E794D6 /* XRWebGLLayerInit.h in Headers */,
> 				85217E030A5ECD4700DB8D00 /* XSLImportRule.h in Headers */,
> 				93F199EC08245E59001E9ABC /* XSLStyleSheet.h in Headers */,
> 				E1F1E8300C3C2BB9006DB391 /* XSLTExtensions.h in Headers */,
>@@ -33801,6 +34081,7 @@
> 				CDF2B0161820540700F2B424 /* MockSourceBufferPrivate.cpp in Sources */,
> 				2D9BF7421DBFDC27007A7D99 /* NavigatorEME.cpp in Sources */,
> 				51A4BB101954D62700FA5C2E /* NavigatorGamepad.cpp in Sources */,
>+				E1EE8B942413195000E794D6 /* NavigatorWebXR.cpp in Sources */,
> 				1A569D130D7E2B82007C3983 /* objc_class.mm in Sources */,
> 				1A569D160D7E2B82007C3983 /* objc_instance.mm in Sources */,
> 				1A569D180D7E2B82007C3983 /* objc_runtime.mm in Sources */,
>@@ -33808,6 +34089,8 @@
> 				E16982601134636A00894115 /* ObjCRuntimeObject.mm in Sources */,
> 				CEA284662141E84900E407E8 /* PlatformEventFactoryIOS.mm in Sources */,
> 				AA12DF491743DF83004DAFDF /* PlatformSpeechSynthesizerIOS.mm in Sources */,
>+				E1EE8B712412B2A800E794D6 /* PlatformXR.cpp in Sources */,
>+				E1EE8B702412B2A800E794D6 /* PlatformXR.cpp in Sources */,
> 				CDA29A301CBF74D400901CCF /* PlaybackSessionInterfaceAVKit.mm in Sources */,
> 				CDA29A161CBDA56C00901CCF /* PlaybackSessionInterfaceMac.mm in Sources */,
> 				419242492127B93E00634FCF /* RealtimeOutgoingVideoSourceCocoa.mm in Sources */,
>@@ -34468,10 +34751,29 @@
> 				F12171F516A8CED2000053CA /* WebVTTElement.cpp in Sources */,
> 				5D21A80213ECE5DF00BB7064 /* WebVTTParser.cpp in Sources */,
> 				B10B6981140C174000BC1C26 /* WebVTTTokenizer.cpp in Sources */,
>+				E1EE8B802413191F00E794D6 /* WebXRBoundedReferenceSpace.cpp in Sources */,
>+				E1EE8B932413195000E794D6 /* WebXRFrame.cpp in Sources */,
>+				E1EE8BA12413196300E794D6 /* WebXRInputSource.cpp in Sources */,
>+				E1EE8B8C2413191F00E794D6 /* WebXRInputSourceArray.cpp in Sources */,
>+				E1EE8B8B2413191F00E794D6 /* WebXRPose.cpp in Sources */,
>+				E1EE8B7F2413191F00E794D6 /* WebXRReferenceSpace.cpp in Sources */,
>+				E1EE8B7C2413191F00E794D6 /* WebXRRenderState.cpp in Sources */,
>+				E1EE8B7B2413191F00E794D6 /* WebXRRigidTransform.cpp in Sources */,
>+				E1EE8BA22413196300E794D6 /* WebXRSession.cpp in Sources */,
>+				E1EE8B982413195000E794D6 /* WebXRSpace.cpp in Sources */,
>+				E1EE8B8E2413195000E794D6 /* WebXRSystem.cpp in Sources */,
>+				E1EE8BA42413196300E794D6 /* WebXRView.cpp in Sources */,
>+				E1EE8BA02413195000E794D6 /* WebXRViewerPose.cpp in Sources */,
>+				E1EE8B912413195000E794D6 /* WebXRViewport.cpp in Sources */,
>+				E1EE8B832413191F00E794D6 /* WebXRWebGLLayer.cpp in Sources */,
> 				A14832C2187F65C700DA63A6 /* WKUtilities.c in Sources */,
> 				A833C7CC0A2CF07400D57664 /* XLinkNames.cpp in Sources */,
> 				A833C80C0A2CF25600D57664 /* XMLNames.cpp in Sources */,
> 				E15A36D91104572700B7B639 /* XMLNSNames.cpp in Sources */,
>+				E1EE8B7A2413191F00E794D6 /* XRInputSourceEvent.cpp in Sources */,
>+				E1EE8BA72413196300E794D6 /* XRInputSourcesChangeEvent.cpp in Sources */,
>+				E1EE8B952413195000E794D6 /* XRReferenceSpaceEvent.cpp in Sources */,
>+				E1EE8B852413191F00E794D6 /* XRSessionEvent.cpp in Sources */,
> 			);
> 			runOnlyForDeploymentPostprocessing = 0;
> 		};
>diff --git a/Source/WebCore/bindings/IDLTypes.h b/Source/WebCore/bindings/IDLTypes.h
>index 305bcf5144e02e361e5d32f0475415e58b865ff3..94f3165e1f27ba02ca9d6b32242cd3134eb132b5 100644
>--- a/Source/WebCore/bindings/IDLTypes.h
>+++ b/Source/WebCore/bindings/IDLTypes.h
>@@ -62,6 +62,7 @@ template<typename T>
> struct IDLType {
>     using ImplementationType = T;
>     using StorageType = T;
>+    using SequenceStorageType = T;
> 
>     using ParameterType = T;
>     using NullableParameterType = Optional<ImplementationType>;
>@@ -82,6 +83,7 @@ struct IDLUnsupportedType : IDLType<void> { };
> struct IDLNull : IDLType<std::nullptr_t> { };
> 
> struct IDLAny : IDLType<JSC::Strong<JSC::Unknown>> {
>+    using SequenceStorageType = JSC::JSValue;
>     using ParameterType = JSC::JSValue;
>     using NullableParameterType = JSC::JSValue;
> 
>diff --git a/Source/WebCore/bindings/js/JSDOMConvertSequences.h b/Source/WebCore/bindings/js/JSDOMConvertSequences.h
>index c49dd938fce27165f747e58fe08a553dbbfdf5c2..86f7f276fc08ae07c01000222d359f0efeb5aebe 100644
>--- a/Source/WebCore/bindings/js/JSDOMConvertSequences.h
>+++ b/Source/WebCore/bindings/js/JSDOMConvertSequences.h
>@@ -40,7 +40,7 @@ namespace Detail {
> 
> template<typename IDLType>
> struct GenericSequenceConverter {
>-    using ReturnType = Vector<typename IDLType::ImplementationType>;
>+    using ReturnType = Vector<typename IDLType::SequenceStorageType>;
> 
>     static ReturnType convert(JSC::JSGlobalObject& lexicalGlobalObject, JSC::JSObject* object)
>     {
>diff --git a/Source/WebCore/bindings/js/WebCoreBuiltinNames.h b/Source/WebCore/bindings/js/WebCoreBuiltinNames.h
>index 44d50b207c538a19792b4f3226afe65287787209..1882a9effe240c459bd5d342617a0cd933c2d889 100644
>--- a/Source/WebCore/bindings/js/WebCoreBuiltinNames.h
>+++ b/Source/WebCore/bindings/js/WebCoreBuiltinNames.h
>@@ -235,6 +235,25 @@ namespace WebCore {
>     macro(WorkletGlobalScope) \
>     macro(WritableStream) \
>     macro(XMLHttpRequest) \
>+    macro(XRBoundedReferenceSpace) \
>+    macro(XRFrame) \
>+    macro(XRInputSource) \
>+    macro(XRInputSourceArray) \
>+    macro(XRInputSourceEvent) \
>+    macro(XRInputSourcesChangeEvent) \
>+    macro(XRPose) \
>+    macro(XRReferenceSpace) \
>+    macro(XRReferenceSpaceEvent) \
>+    macro(XRRenderState) \
>+    macro(XRRigidTransform) \
>+    macro(XRSession) \
>+    macro(XRSessionEvent) \
>+    macro(XRSpace) \
>+    macro(XRSystem) \
>+    macro(XRView) \
>+    macro(XRViewerPose) \
>+    macro(XRViewport) \
>+    macro(XRWebGLLayer) \
>     macro(appendFromJS) \
>     macro(associatedReadableByteStreamController) \
>     macro(autoAllocateChunkSize) \
>diff --git a/Source/WebCore/dom/EventNames.h b/Source/WebCore/dom/EventNames.h
>index d4960b9cf751f411422b670841a05b8bd2c71c28..5ceee6f6816dee9d799cb150e175ac5d7ed4ac77 100644
>--- a/Source/WebCore/dom/EventNames.h
>+++ b/Source/WebCore/dom/EventNames.h
>@@ -148,6 +148,7 @@ namespace WebCore {
>     macro(icegatheringstatechange) \
>     macro(inactive) \
>     macro(input) \
>+    macro(inputsourceschange) \
>     macro(install) \
>     macro(invalid) \
>     macro(keydown) \
>@@ -231,6 +232,7 @@ namespace WebCore {
>     macro(seeked) \
>     macro(seeking) \
>     macro(select) \
>+    macro(selectend) \
>     macro(selectionchange) \
>     macro(selectstart) \
>     macro(shippingaddresschange) \
>@@ -285,13 +287,6 @@ namespace WebCore {
>     macro(versionchange) \
>     macro(visibilitychange) \
>     macro(volumechange) \
>-    macro(vrdisplayactivate) \
>-    macro(vrdisplayblur) \
>-    macro(vrdisplayconnect) \
>-    macro(vrdisplaydeactivate) \
>-    macro(vrdisplaydisconnect) \
>-    macro(vrdisplayfocus) \
>-    macro(vrdisplaypresentchange) \
>     macro(waiting) \
>     macro(waitingforkey) \
>     macro(webglcontextchanged) \
>diff --git a/Source/WebCore/dom/EventNames.in b/Source/WebCore/dom/EventNames.in
>index a590861068f5e37667132fd1aa42e6791817d8a0..aeb234aa3e467c3aec9b48e9b008ce1a0e63603d 100644
>--- a/Source/WebCore/dom/EventNames.in
>+++ b/Source/WebCore/dom/EventNames.in
>@@ -85,3 +85,7 @@ MediaKeyMessageEvent conditional=ENCRYPTED_MEDIA
> PointerEvent
> GPUUncapturedErrorEvent conditional=WEBGPU
> EnterPictureInPictureEvent conditional=PICTURE_IN_PICTURE_API
>+XRInputSourceEvent conditional=WEBXR
>+XRInputSourcesChangeEvent conditional=WEBXR
>+XRReferenceSpaceEvent conditional=WEBXR
>+XRSessionEvent conditional=WEBXR
>diff --git a/Source/WebCore/dom/EventTargetFactory.in b/Source/WebCore/dom/EventTargetFactory.in
>index 81e7cc9f0b7650562aabfefe05a5a3ad1bbbb8ff..837eb5dcd0e995ca0224ecfebe70bce1eb833b36 100644
>--- a/Source/WebCore/dom/EventTargetFactory.in
>+++ b/Source/WebCore/dom/EventTargetFactory.in
>@@ -58,4 +58,6 @@ Worker
> WorkletGlobalScope conditional=CSS_PAINTING_API
> XMLHttpRequest
> XMLHttpRequestUpload
>-
>+WebXRSession conditional=WEBXR
>+WebXRSpace conditional=WEBXR
>+WebXRSystem conditional=WEBXR
>diff --git a/Source/WebCore/page/RuntimeEnabledFeatures.h b/Source/WebCore/page/RuntimeEnabledFeatures.h
>index 5d1afdbed55e36feb10f4e3503710269f37ee9ae..de7e38d25eb233c885a814fdcc22c6bc38c4524a 100644
>--- a/Source/WebCore/page/RuntimeEnabledFeatures.h
>+++ b/Source/WebCore/page/RuntimeEnabledFeatures.h
>@@ -138,6 +138,11 @@ public:
>     void setInspectorAdditionsEnabled(bool isEnabled) { m_inspectorAdditionsEnabled = isEnabled; }
>     bool inspectorAdditionsEnabled() const { return m_inspectorAdditionsEnabled; }
> 
>+#if ENABLE(WEBXR)
>+    void setWebXREnabled(bool isEnabled) { m_webXREnabled = isEnabled; }
>+    bool webXREnabled() const { return m_webXREnabled; }
>+#endif
>+
>     void setAccessibilityObjectModelEnabled(bool isEnabled) { m_accessibilityObjectModelEnabled = isEnabled; }
>     bool accessibilityObjectModelEnabled() const { return m_accessibilityObjectModelEnabled; }
> 
>@@ -446,6 +451,9 @@ private:
>     bool m_isWebSocketEnabled { true };
>     bool m_fetchAPIKeepAliveEnabled { false };
>     bool m_inspectorAdditionsEnabled { false };
>+#if ENABLE(WEBXR)
>+    bool m_webXREnabled { false };
>+#endif
>     bool m_accessibilityObjectModelEnabled { false };
>     bool m_ariaReflectionEnabled { true };
>     bool m_itpDebugMode { false };
>diff --git a/Source/WebCore/platform/xr/PlatformXR.cpp b/Source/WebCore/platform/xr/PlatformXR.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..17268ee677a379a6bf55170b9904f33bbe771af8
>--- /dev/null
>+++ b/Source/WebCore/platform/xr/PlatformXR.cpp
>@@ -0,0 +1,21 @@
>+/*
>+ * Copyright (C) 2020 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"
>+#include "PlatformXR.h"
>diff --git a/Source/WebCore/platform/xr/PlatformXR.h b/Source/WebCore/platform/xr/PlatformXR.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..c0883bd52dbf7581a858c921fd25ab00b986b7b9
>--- /dev/null
>+++ b/Source/WebCore/platform/xr/PlatformXR.h
>@@ -0,0 +1,52 @@
>+/*
>+ * Copyright (C) 2020 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.
>+ */
>+#pragma once
>+
>+#include <memory>
>+#include <wtf/WeakPtr.h>
>+
>+namespace PlatformXR {
>+
>+enum class SessionMode {
>+    Inline,
>+    ImmersiveVr,
>+    ImmersiveAr,
>+};
>+
>+#if ENABLE(WEBXR)
>+
>+class Device : public CanMakeWeakPtr<Device> {
>+public:
>+};
>+
>+class Instance {
>+public:
>+    static Instance& singleton();
>+
>+private:
>+    Instance();
>+    ~Instance();
>+
>+    struct Impl;
>+    std::unique_ptr<Impl> m_impl;
>+};
>+
>+#endif // ENABLE(WEBXR)
>+
>+} // namespace PlatformXR
>diff --git a/Source/WebCore/platform/xr/openxr/PlatformXR.cpp b/Source/WebCore/platform/xr/openxr/PlatformXR.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..ca4f4c2c18f3a3de131b8749311a41aefebbed5b
>--- /dev/null
>+++ b/Source/WebCore/platform/xr/openxr/PlatformXR.cpp
>@@ -0,0 +1,166 @@
>+/*
>+ * Copyright (C) 2020 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"
>+#include "PlatformXR.h"
>+
>+#if ENABLE(WEBXR)
>+
>+#if USE_OPENXR
>+#include <openxr/openxr.h>
>+#include <wtf/text/StringConcatenateNumbers.h>
>+#include <wtf/text/WTFString.h>
>+#endif // USE_OPENXR
>+#include <wtf/NeverDestroyed.h>
>+
>+namespace PlatformXR {
>+
>+#if USE_OPENXR
>+
>+template<typename T, XrStructureType StructureType>
>+T createStructure()
>+{
>+    T object;
>+    std::memset(&object, 0, sizeof(T));
>+    object.type = StructureType;
>+    object.next = nullptr;
>+    return object;
>+}
>+
>+String resultToString(XrResult value, XrInstance instance)
>+{
>+    char buffer[XR_MAX_RESULT_STRING_SIZE];
>+    XrResult result = xrResultToString(instance, value, buffer);
>+    if (result == XR_SUCCESS)
>+        return String(buffer);
>+    return makeString("<unknown ", int(value), ">");
>+}
>+
>+#define RETURN_IF_FAILED(result, call, instance)                                                     \
>+    if (XR_FAILED(result)) {                                                                         \
>+        WTFLogAlways("%s %s: %s\n", __func__, call, resultToString(result, instance).utf8().data()); \
>+        return;                                                                                      \
>+    }                                                                                                \
>+
>+#endif // USE_OPENXR
>+
>+struct Instance::Impl {
>+    WTF_MAKE_FAST_ALLOCATED;
>+public:
>+    Impl();
>+    ~Impl();
>+
>+#if USE_OPENXR
>+    XrInstance m_instance { XR_NULL_HANDLE };
>+#endif // USE_OPENXR
>+};
>+
>+Instance::Impl::Impl()
>+{
>+#if USE_OPENXR
>+    WTFLogAlways("OpenXR: initializing\n");
>+
>+    [&] {
>+        uint32_t propertyCountOutput { 0 };
>+        XrResult result = xrEnumerateApiLayerProperties(0, &propertyCountOutput, nullptr);
>+        RETURN_IF_FAILED(result, "xrEnumerateApiLayerProperties()", m_instance);
>+
>+        if (!propertyCountOutput) {
>+            WTFLogAlways("xrEnumerateApiLayerProperties(): no properties\n");
>+            return;
>+        }
>+
>+        Vector<XrApiLayerProperties> properties(propertyCountOutput);
>+        result = xrEnumerateApiLayerProperties(propertyCountOutput, nullptr, properties.data());
>+        RETURN_IF_FAILED(result, "xrEnumerateApiLayerProperties()", m_instance);
>+
>+        WTFLogAlways("xrEnumerateApiLayerProperties(): %zu properties\n", properties.size());
>+    }();
>+
>+    [&] {
>+        uint32_t propertyCountOutput { 0 };
>+        XrResult result = xrEnumerateInstanceExtensionProperties(nullptr, 0, &propertyCountOutput, nullptr);
>+        RETURN_IF_FAILED(result, "xrEnumerateInstanceExtensionProperties()", m_instance);
>+
>+        if (!propertyCountOutput) {
>+            WTFLogAlways("xrEnumerateInstanceExtensionProperties(): no properties\n");
>+            return;
>+        }
>+
>+        Vector<XrExtensionProperties> properties(propertyCountOutput,
>+            [] {
>+                XrExtensionProperties object;
>+                std::memset(&object, 0, sizeof(XrExtensionProperties));
>+                object.type = XR_TYPE_EXTENSION_PROPERTIES;
>+                return object;
>+            }());
>+        uint32_t propertyCountWritten { 0 };
>+        result = xrEnumerateInstanceExtensionProperties(nullptr, propertyCountOutput, &propertyCountWritten, properties.data());
>+        RETURN_IF_FAILED(result, "xrEnumerateInstanceExtensionProperties()", m_instance);
>+
>+        WTFLogAlways("xrEnumerateInstanceExtensionProperties(): %zu extension properties\n", properties.size());
>+        for (auto& property : properties) {
>+            WTFLogAlways("  extension '%s', version %u\n",
>+                property.extensionName, property.extensionVersion);
>+        }
>+    }();
>+
>+    static const char* s_applicationName = "WebXR (WebKit)";
>+    static const uint32_t s_applicationVersion = 1;
>+
>+    {
>+        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 = 0;
>+
>+        XrInstance instance;
>+        XrResult result = xrCreateInstance(&createInfo, &instance);
>+        RETURN_IF_FAILED(result, "xrCreateInstance()", m_instance);
>+
>+        m_instance = instance;
>+        WTFLogAlways("xrCreateInstance(): using instance %p\n", m_instance);
>+    }
>+#endif // USE_OPENXR
>+}
>+
>+Instance::Impl::~Impl()
>+{
>+}
>+
>+Instance& Instance::singleton()
>+{
>+    static LazyNeverDestroyed<Instance> s_instance;
>+    static std::once_flag s_onceFlag;
>+    std::call_once(s_onceFlag,
>+        [&] {
>+            s_instance->m_impl = makeUnique<Impl>();
>+        });
>+    return s_instance.get();
>+}
>+
>+Instance::Instance() = default;
>+Instance::~Instance() = default;
>+
>+} // namespace PlatformXR
>+
>+#endif // ENABLE(WEBXR)
>diff --git a/Source/WebKit/Configurations/FeatureDefines.xcconfig b/Source/WebKit/Configurations/FeatureDefines.xcconfig
>index e6a30029a01df1802ebf72f58fa8411581e801b4..cfbb7295135f01b4c7476519d4687e6c6f1be345 100644
>--- a/Source/WebKit/Configurations/FeatureDefines.xcconfig
>+++ b/Source/WebKit/Configurations/FeatureDefines.xcconfig
>@@ -394,6 +394,8 @@ ENABLE_WEBGPU_appletvos = ENABLE_WEBGPU;
> ENABLE_WEBGPU_macosx = $(ENABLE_WEBGPU$(WK_MACOS_1014));
> ENABLE_WEBGPU_MACOS_SINCE_1014 = ENABLE_WEBGPU;
> 
>+ENABLE_WEBXR = ;
>+
> ENABLE_WEB_API_STATISTICS = ;
> 
> ENABLE_WEB_AUDIO = ENABLE_WEB_AUDIO;
>@@ -414,4 +416,4 @@ ENABLE_WIRELESS_PLAYBACK_TARGET = ENABLE_WIRELESS_PLAYBACK_TARGET;
> 
> ENABLE_XSLT = ENABLE_XSLT;
> 
>-FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCESSIBILITY_ISOLATED_TREE) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLE_PAY_SESSION_V9) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_CONIC_GRADIENTS) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_PAINTING_API) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CSS_TYPED_OM) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_C_LOOP) $(ENABLE_DARK_MODE_CSS) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FULLSCREEN_API) $(ENABLE_PICTURE_IN_PICTURE_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_GPU_PROCESS) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INSPECTOR_ALTERNATE_DISPATCHERS) $(ENABLE_INSPECTOR_TELEMETRY) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_MEMORY_SAMPLER) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NETWORK_CACHE_SPECULATIVE_REVALIDATION) $(ENABLE_NETWORK_CACHE_STALE_WHILE_REVALIDATE) $(ENABLE_NOTIFICATIONS) $(ENABLE_OFFSCREEN_CANVAS) $(ENABLE_OVERFLOW_SCROLLING_TOUCH) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESIZE_OBSERVER) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_LOAD_STATISTICS) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SANDBOX_EXTENSIONS) $(ENABLE_SERVER_PRECONNECT) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SHAREABLE_RESOURCE) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USERSELECT_ALL) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEBDRIVER_MOUSE_INTERACTIONS) $(ENABLE_WEBDRIVER_KEYBOARD_INTERACTIONS) $(ENABLE_WEBDRIVER_TOUCH_INTERACTIONS) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WEB_API_STATISTICS) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_CRYPTO) $(ENABLE_WEB_RTC) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>+FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCESSIBILITY_ISOLATED_TREE) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLE_PAY_SESSION_V9) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_CONIC_GRADIENTS) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_PAINTING_API) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CSS_TYPED_OM) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_C_LOOP) $(ENABLE_DARK_MODE_CSS) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FULLSCREEN_API) $(ENABLE_PICTURE_IN_PICTURE_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_GPU_PROCESS) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INSPECTOR_ALTERNATE_DISPATCHERS) $(ENABLE_INSPECTOR_TELEMETRY) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_MEMORY_SAMPLER) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NETWORK_CACHE_SPECULATIVE_REVALIDATION) $(ENABLE_NETWORK_CACHE_STALE_WHILE_REVALIDATE) $(ENABLE_NOTIFICATIONS) $(ENABLE_OFFSCREEN_CANVAS) $(ENABLE_OVERFLOW_SCROLLING_TOUCH) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESIZE_OBSERVER) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_LOAD_STATISTICS) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SANDBOX_EXTENSIONS) $(ENABLE_SERVER_PRECONNECT) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SHAREABLE_RESOURCE) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USERSELECT_ALL) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEBDRIVER_MOUSE_INTERACTIONS) $(ENABLE_WEBDRIVER_KEYBOARD_INTERACTIONS) $(ENABLE_WEBDRIVER_TOUCH_INTERACTIONS) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WEBXR) $(ENABLE_WEB_API_STATISTICS) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_CRYPTO) $(ENABLE_WEB_RTC) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>diff --git a/Source/WebKit/Shared/WebPreferences.yaml b/Source/WebKit/Shared/WebPreferences.yaml
>index 0b3ce943ac30508e04cdb0c711021fc5f747b4f8..3c9ab033aba2dc85f5e2775ce76cf6933f689fb0 100644
>--- a/Source/WebKit/Shared/WebPreferences.yaml
>+++ b/Source/WebKit/Shared/WebPreferences.yaml
>@@ -1982,6 +1982,15 @@ IncrementalPDFLoadingEnabled:
>   condition: HAVE(INCREMENTAL_PDF_APIS)
>   webcoreBinding: RuntimeEnabledFeatures
> 
>+WebXREnabled:
>+  type: bool
>+  defaultValue: defaultWebXREnabled()
>+  humanReadableName: "WebXR Device API"
>+  humanReadableDescription: "Adds support for accessing virtual reality (VR) and augmented reality (AR) devices, including sensors and head-mounted displays, on the Web"
>+  category: experimental
>+  webcoreBinding: RuntimeEnabledFeatures
>+  condition: ENABLE(WEBXR)
>+
> # Deprecated
> 
> ICECandidateFilteringEnabled:
>diff --git a/Source/WebKit/Shared/WebPreferencesDefaultValues.cpp b/Source/WebKit/Shared/WebPreferencesDefaultValues.cpp
>index 7ddac133d1abfc20299517bc6524b7a830581058..ecf3f0384275c3d8f7dfccac030b0f7179ac5ea0 100644
>--- a/Source/WebKit/Shared/WebPreferencesDefaultValues.cpp
>+++ b/Source/WebKit/Shared/WebPreferencesDefaultValues.cpp
>@@ -225,4 +225,18 @@ bool defaultIncrementalPDFEnabled()
> }
> #endif
> 
>+#if ENABLE(WEBXR)
>+
>+bool defaultWebXREnabled()
>+{
>+#if HAVE(HAVE_SYSTEM_FEATURE_FLAGS)
>+    return os_feature_enabled(WebKit, WebXR);
>+#endif
>+
>+    return false;
>+}
>+
>+#endif // ENABLE(WEBXR)
>+
>+
> } // namespace WebKit
>diff --git a/Source/WebKit/Shared/WebPreferencesDefaultValues.h b/Source/WebKit/Shared/WebPreferencesDefaultValues.h
>index 717cf2465f4456d2b50bf7270fda1faf6d5408b5..2955a094d6436bfc96bfd65df46fcea911699c13 100644
>--- a/Source/WebKit/Shared/WebPreferencesDefaultValues.h
>+++ b/Source/WebKit/Shared/WebPreferencesDefaultValues.h
>@@ -332,4 +332,8 @@ bool defaultInAppBrowserPrivacy();
> bool defaultIncrementalPDFEnabled();
> #endif
> 
>+#if ENABLE(WEBXR)
>+bool defaultWebXREnabled();
>+#endif
>+
> } // namespace WebKit
>diff --git a/Source/WebKit/WebProcess/InjectedBundle/InjectedBundle.cpp b/Source/WebKit/WebProcess/InjectedBundle/InjectedBundle.cpp
>index 5615b991b33fbdd2b06591e79b5906c834f3f2d0..f3e6ab755b72c7393dfdaa5d28f10953cfc5bd1a 100644
>--- a/Source/WebKit/WebProcess/InjectedBundle/InjectedBundle.cpp
>+++ b/Source/WebKit/WebProcess/InjectedBundle/InjectedBundle.cpp
>@@ -289,6 +289,11 @@ void InjectedBundle::overrideBoolPreferenceForTestRunner(WebPageGroupProxy* page
>         RuntimeEnabledFeatures::sharedFeatures().setOffscreenCanvasEnabled(enabled);
> #endif
> 
>+#if ENABLE(WEBXR)
>+    if (preference == "WebKitWebXREnabled")
>+        RuntimeEnabledFeatures::sharedFeatures().setWebXREnabled(enabled);
>+#endif
>+
>     // Map the names used in LayoutTests with the names used in WebCore::Settings and WebPreferencesStore.
> #define FOR_EACH_OVERRIDE_BOOL_PREFERENCE(macro) \
>     macro(WebKitJavaEnabled, JavaEnabled, javaEnabled) \
>diff --git a/Source/WebKitLegacy/mac/Configurations/FeatureDefines.xcconfig b/Source/WebKitLegacy/mac/Configurations/FeatureDefines.xcconfig
>index e6a30029a01df1802ebf72f58fa8411581e801b4..cfbb7295135f01b4c7476519d4687e6c6f1be345 100644
>--- a/Source/WebKitLegacy/mac/Configurations/FeatureDefines.xcconfig
>+++ b/Source/WebKitLegacy/mac/Configurations/FeatureDefines.xcconfig
>@@ -394,6 +394,8 @@ ENABLE_WEBGPU_appletvos = ENABLE_WEBGPU;
> ENABLE_WEBGPU_macosx = $(ENABLE_WEBGPU$(WK_MACOS_1014));
> ENABLE_WEBGPU_MACOS_SINCE_1014 = ENABLE_WEBGPU;
> 
>+ENABLE_WEBXR = ;
>+
> ENABLE_WEB_API_STATISTICS = ;
> 
> ENABLE_WEB_AUDIO = ENABLE_WEB_AUDIO;
>@@ -414,4 +416,4 @@ ENABLE_WIRELESS_PLAYBACK_TARGET = ENABLE_WIRELESS_PLAYBACK_TARGET;
> 
> ENABLE_XSLT = ENABLE_XSLT;
> 
>-FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCESSIBILITY_ISOLATED_TREE) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLE_PAY_SESSION_V9) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_CONIC_GRADIENTS) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_PAINTING_API) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CSS_TYPED_OM) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_C_LOOP) $(ENABLE_DARK_MODE_CSS) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FULLSCREEN_API) $(ENABLE_PICTURE_IN_PICTURE_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_GPU_PROCESS) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INSPECTOR_ALTERNATE_DISPATCHERS) $(ENABLE_INSPECTOR_TELEMETRY) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_MEMORY_SAMPLER) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NETWORK_CACHE_SPECULATIVE_REVALIDATION) $(ENABLE_NETWORK_CACHE_STALE_WHILE_REVALIDATE) $(ENABLE_NOTIFICATIONS) $(ENABLE_OFFSCREEN_CANVAS) $(ENABLE_OVERFLOW_SCROLLING_TOUCH) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESIZE_OBSERVER) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_LOAD_STATISTICS) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SANDBOX_EXTENSIONS) $(ENABLE_SERVER_PRECONNECT) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SHAREABLE_RESOURCE) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USERSELECT_ALL) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEBDRIVER_MOUSE_INTERACTIONS) $(ENABLE_WEBDRIVER_KEYBOARD_INTERACTIONS) $(ENABLE_WEBDRIVER_TOUCH_INTERACTIONS) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WEB_API_STATISTICS) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_CRYPTO) $(ENABLE_WEB_RTC) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>+FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCESSIBILITY_ISOLATED_TREE) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLE_PAY_SESSION_V9) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_CONIC_GRADIENTS) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_PAINTING_API) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CSS_TYPED_OM) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_C_LOOP) $(ENABLE_DARK_MODE_CSS) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FULLSCREEN_API) $(ENABLE_PICTURE_IN_PICTURE_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_GPU_PROCESS) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INSPECTOR_ALTERNATE_DISPATCHERS) $(ENABLE_INSPECTOR_TELEMETRY) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_MEMORY_SAMPLER) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NETWORK_CACHE_SPECULATIVE_REVALIDATION) $(ENABLE_NETWORK_CACHE_STALE_WHILE_REVALIDATE) $(ENABLE_NOTIFICATIONS) $(ENABLE_OFFSCREEN_CANVAS) $(ENABLE_OVERFLOW_SCROLLING_TOUCH) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESIZE_OBSERVER) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_LOAD_STATISTICS) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SANDBOX_EXTENSIONS) $(ENABLE_SERVER_PRECONNECT) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SHAREABLE_RESOURCE) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USERSELECT_ALL) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEBDRIVER_MOUSE_INTERACTIONS) $(ENABLE_WEBDRIVER_KEYBOARD_INTERACTIONS) $(ENABLE_WEBDRIVER_TOUCH_INTERACTIONS) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WEBXR) $(ENABLE_WEB_API_STATISTICS) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_CRYPTO) $(ENABLE_WEB_RTC) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>diff --git a/Source/cmake/FindOpenXR.cmake b/Source/cmake/FindOpenXR.cmake
>new file mode 100644
>index 0000000000000000000000000000000000000000..bbfdf04c11edd03900fc4c142ce76a6614830f6e
>--- /dev/null
>+++ b/Source/cmake/FindOpenXR.cmake
>@@ -0,0 +1,47 @@
>+# - Try to find OpenXR.
>+# Once done, this will define
>+#
>+#  OPENXR_FOUND - system has WPE.
>+#  OPENXR_INCLUDE_DIRS - the WPE include directories
>+#  OPENXR_LIBRARIES - link these to use WPE.
>+#
>+# Copyright (C) 2019 Igalia S.L.
>+#
>+# Redistribution and use in source and binary forms, with or without
>+# modification, are permitted provided that the following conditions
>+# are met:
>+# 1.  Redistributions of source code must retain the above copyright
>+#     notice, this list of conditions and the following disclaimer.
>+# 2.  Redistributions in binary form must reproduce the above copyright
>+#     notice, this list of conditions and the following disclaimer in the
>+#     documentation and/or other materials provided with the distribution.
>+#
>+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND ITS CONTRIBUTORS ``AS
>+# IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR ITS
>+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
>+# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
>+# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
>+# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
>+# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
>+# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
>+# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+
>+find_package(PkgConfig)
>+pkg_check_modules(PC_OPENXR QUIET openxr)
>+
>+find_path(OPENXR_INCLUDE_DIRS
>+    NAMES openxr/openxr.h
>+    HINTS ${PC_OPENXR_INCLUDEDIR} ${PC_OPENXR_INCLUDE_DIRS}
>+)
>+
>+find_library(OPENXR_LIBRARIES
>+    NAMES openxr_loader
>+    HINTS ${PC_OPENXR_LIBDIR} ${PC_OPENXR_LIBRARY_DIRS}
>+)
>+
>+mark_as_advanced(OPENXR_INCLUDE_DIRS OPENXR_LIBRARIES)
>+
>+include(FindPackageHandleStandardArgs)
>+find_package_handle_standard_args(OpenXR REQUIRED_VARS OPENXR_INCLUDE_DIRS OPENXR_LIBRARIES)
>diff --git a/Source/cmake/OptionsWPE.cmake b/Source/cmake/OptionsWPE.cmake
>index dff6491a7340f1b35ce0cc28127d2c7416565660..05531cf6560c0f5b19f43e147623f1163bb9bd29 100644
>--- a/Source/cmake/OptionsWPE.cmake
>+++ b/Source/cmake/OptionsWPE.cmake
>@@ -49,6 +49,9 @@ WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_XSLT PUBLIC ON)
> # Changing these options is completely unsupported.
> WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_ASYNC_SCROLLING PRIVATE ON)
> WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_AUTOCAPITALIZE PRIVATE ON)
>+WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_CSS_CONIC_GRADIENTS PRIVATE ON)
>+WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_CSS_PAINTING_API PRIVATE ${ENABLE_EXPERIMENTAL_FEATURES})
>+WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_CSS_TYPED_OM PRIVATE ${ENABLE_EXPERIMENTAL_FEATURES})
> WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_CONTENT_EXTENSIONS PRIVATE ON)
> WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_LAYOUT_FORMATTING_CONTEXT PRIVATE ${ENABLE_EXPERIMENTAL_FEATURES})
> WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_MEDIA_STREAM PRIVATE ${ENABLE_EXPERIMENTAL_FEATURES})
>@@ -62,9 +65,7 @@ WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_SMOOTH_SCROLLING PRIVATE OFF)
> WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_TOUCH_EVENTS PRIVATE ON)
> WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_WEBGL2 PRIVATE ${ENABLE_EXPERIMENTAL_FEATURES})
> WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_WEB_RTC PRIVATE ${ENABLE_EXPERIMENTAL_FEATURES})
>-WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_CSS_PAINTING_API PRIVATE ${ENABLE_EXPERIMENTAL_FEATURES})
>-WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_CSS_TYPED_OM PRIVATE ${ENABLE_EXPERIMENTAL_FEATURES})
>-WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_CSS_CONIC_GRADIENTS PRIVATE ON)
>+WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_WEBXR PRIVATE ${ENABLE_EXPERIMENTAL_FEATURES})
> 
> # Public options specific to the WPE port. Do not add any options here unless
> # there is a strong reason we should support changing the value of the option,
>@@ -171,6 +172,11 @@ if (ENABLE_WPE_QT_API OR USE_WPE_VIDEO_PLANE_DISPLAY_DMABUF)
>     find_package(WPEBackend_fdo 1.5.0 REQUIRED)
> endif ()
> 
>+if (ENABLE_WEBXR)
>+    find_package(OpenXR 1.0)
>+    SET_AND_EXPOSE_TO_BUILD(USE_OPENXR ${OpenXR_FOUND})
>+endif ()
>+
> add_definitions(-DBUILDING_WPE__=1)
> add_definitions(-DGETTEXT_PACKAGE="WPE")
> add_definitions(-DJSC_GLIB_API_ENABLED)
>diff --git a/Source/cmake/WebKitFeatures.cmake b/Source/cmake/WebKitFeatures.cmake
>index ff7d6d1c70f9d13007bdf7d46e64d07d7756f0f8..b5919651198f2e3825dca9b83ef6db7e35a28c3b 100644
>--- a/Source/cmake/WebKitFeatures.cmake
>+++ b/Source/cmake/WebKitFeatures.cmake
>@@ -230,6 +230,7 @@ macro(WEBKIT_OPTION_BEGIN)
>     WEBKIT_OPTION_DEFINE(ENABLE_WEB_AUTHN "Toggle Web AuthN support" PRIVATE OFF)
>     WEBKIT_OPTION_DEFINE(ENABLE_WEB_CRYPTO "Toggle WebCrypto Subtle-Crypto support" PRIVATE ON)
>     WEBKIT_OPTION_DEFINE(ENABLE_WEB_RTC "Toggle WebRTC support" PRIVATE OFF)
>+    WEBKIT_OPTION_DEFINE(ENABLE_WEBXR "Toggle WebXR support" PRIVATE OFF)
>     WEBKIT_OPTION_DEFINE(ENABLE_WIRELESS_PLAYBACK_TARGET "Toggle wireless playback target support" PRIVATE OFF)
>     WEBKIT_OPTION_DEFINE(ENABLE_XSLT "Toggle XSLT support" PRIVATE ON)
>     WEBKIT_OPTION_DEFINE(USE_SYSTEM_MALLOC "Toggle system allocator instead of WebKit's custom allocator" PRIVATE ${USE_SYSTEM_MALLOC_DEFAULT})
>@@ -257,6 +258,7 @@ macro(WEBKIT_OPTION_BEGIN)
>     WEBKIT_OPTION_DEPEND(ENABLE_VIDEO_TRACK ENABLE_VIDEO)
>     WEBKIT_OPTION_DEPEND(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN ENABLE_VIDEO)
>     WEBKIT_OPTION_DEPEND(ENABLE_TOUCH_SLIDER ENABLE_TOUCH_EVENTS)
>+    WEBKIT_OPTION_DEPEND(ENABLE_WEBXR ENABLE_WEBGL)
> endmacro()
> 
> macro(_WEBKIT_OPTION_ENFORCE_DEPENDS _name)
>diff --git a/Source/cmake/tools/vsprops/FeatureDefines.props b/Source/cmake/tools/vsprops/FeatureDefines.props
>index 96d4600cfb6a2174c0d89e47dbce7ccde0ef55d1..bde2b88fd5ef48c31b5ddde55d0c826b877a4666 100644
>--- a/Source/cmake/tools/vsprops/FeatureDefines.props
>+++ b/Source/cmake/tools/vsprops/FeatureDefines.props
>@@ -66,6 +66,7 @@
>     <ENABLE_WEB_AUTHN />
>     <ENABLE_WEBGL />
>     <ENABLE_WEBGPU />
>+    <ENABLE_WEBXR />
>     <ENABLE_XHR_TIMEOUT>ENABLE_XHR_TIMEOUT</ENABLE_XHR_TIMEOUT>
>     <ENABLE_XSLT>ENABLE_XSLT</ENABLE_XSLT>
>   </PropertyGroup>
>@@ -74,7 +75,7 @@
>   </PropertyGroup>
>   <ItemDefinitionGroup>
>     <ClCompile>
>-      <PreprocessorDefinitions>$(ENABLE_3D_TRANSFORMS);$(ENABLE_ACCELERATED_2D_CANVAS);$(ENABLE_OVERFLOW_SCROLLING_TOUCH);$(ENABLE_ATTACHMENT_ELEMENT);$(ENABLE_CHANNEL_MESSAGING);$(ENABLE_CSS3_CONDITIONAL_RULES);$(ENABLE_CSS_IMAGE_SET);$(ENABLE_CSS3_TEXT);$(ENABLE_CSS_BOX_DECORATION_BREAK);$(ENABLE_CSS_SHADERS);$(ENABLE_CSS_COMPOSITING);$(ENABLE_CSS_SELECTORS_LEVEL4);$(ENABLE_CSS_SHAPE_INSIDE);$(ENABLE_CSS_TRANSFORMS_ANIMATIONS_TRANSITIONS_UNPREFIXED);$(ENABLE_CURSOR_VISIBILITY);$(ENABLE_CUSTOM_SCHEME_HANDLER);$(ENABLE_DARK_MODE_CSS);$(ENABLE_DATAGRID);$(ENABLE_DATALIST_ELEMENT);$(ENABLE_DEVICE_ORIENTATION);$(ENABLE_DIRECTORY_UPLOAD);$(ENABLE_ENCRYPTED_MEDIA);$(ENABLE_FETCH_API);$(ENABLE_FILE_SYSTEM);$(ENABLE_FULLSCREEN_API);$(ENABLE_GAMEPAD);$(ENABLE_GEOLOCATION);$(ENABLE_HIGH_DPI_CANVAS);$(ENABLE_INDEXED_DATABASE);$(ENABLE_INPUT_TYPE_COLOR);$(ENABLE_INPUT_SPEECH);$(ENABLE_INPUT_TYPE_DATE);$(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE);$(ENABLE_INPUT_TYPE_DATETIMELOCAL);$(ENABLE_INPUT_TYPE_MONTH);$(ENABLE_INPUT_TYPE_TIME);$(ENABLE_INPUT_TYPE_WEEK);$(ENABLE_INTL);$(ENABLE_LEGACY_CSS_VENDOR_PREFIXES);$(ENABLE_LEGACY_ENCRYPTED_MEDIA);$(ENABLE_LINK_PRERENDER);$(ENABLE_MATHML);$(ENABLE_METER_ELEMENT);$(ENABLE_MICRODATA);$(ENABLE_MOUSE_CURSOR_SCALE);$(ENABLE_NOTIFICATIONS);$(ENABLE_QUOTA);$(ENABLE_STREAMS_API);$(ENABLE_SCRIPTED_SPEECH);$(ENABLE_SHARED_WORKERS);$(ENABLE_MEDIA_CONTROLS_SCRIPT);$(ENABLE_MEDIA_SOURCE);$(ENABLE_MEDIA_STATISTICS);$(ENABLE_SQL_DATABASE);$(ENABLE_STYLE_SCOPED);$(ENABLE_SUBPIXEL_LAYOUT);$(ENABLE_SVG_DOM_OBJC_BINDINGS);$(ENABLE_SVG_FONTS);$(ENABLE_VIDEO);$(ENABLE_VIDEO_TRACK);$(ENABLE_WEB_AUDIO);$(ENABLE_WEBGL);$(ENABLE_WEBGPU);$(ENABLE_XHR_TIMEOUT);$(ENABLE_XSLT);%(PreprocessorDefinitions)</PreprocessorDefinitions>
>+      <PreprocessorDefinitions>$(ENABLE_3D_TRANSFORMS);$(ENABLE_ACCELERATED_2D_CANVAS);$(ENABLE_OVERFLOW_SCROLLING_TOUCH);$(ENABLE_ATTACHMENT_ELEMENT);$(ENABLE_CHANNEL_MESSAGING);$(ENABLE_CSS3_CONDITIONAL_RULES);$(ENABLE_CSS_IMAGE_SET);$(ENABLE_CSS3_TEXT);$(ENABLE_CSS_BOX_DECORATION_BREAK);$(ENABLE_CSS_SHADERS);$(ENABLE_CSS_COMPOSITING);$(ENABLE_CSS_SELECTORS_LEVEL4);$(ENABLE_CSS_SHAPE_INSIDE);$(ENABLE_CSS_TRANSFORMS_ANIMATIONS_TRANSITIONS_UNPREFIXED);$(ENABLE_CURSOR_VISIBILITY);$(ENABLE_CUSTOM_SCHEME_HANDLER);$(ENABLE_DARK_MODE_CSS);$(ENABLE_DATAGRID);$(ENABLE_DATALIST_ELEMENT);$(ENABLE_DEVICE_ORIENTATION);$(ENABLE_DIRECTORY_UPLOAD);$(ENABLE_ENCRYPTED_MEDIA);$(ENABLE_FETCH_API);$(ENABLE_FILE_SYSTEM);$(ENABLE_FULLSCREEN_API);$(ENABLE_GAMEPAD);$(ENABLE_GEOLOCATION);$(ENABLE_HIGH_DPI_CANVAS);$(ENABLE_INDEXED_DATABASE);$(ENABLE_INPUT_TYPE_COLOR);$(ENABLE_INPUT_SPEECH);$(ENABLE_INPUT_TYPE_DATE);$(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE);$(ENABLE_INPUT_TYPE_DATETIMELOCAL);$(ENABLE_INPUT_TYPE_MONTH);$(ENABLE_INPUT_TYPE_TIME);$(ENABLE_INPUT_TYPE_WEEK);$(ENABLE_INTL);$(ENABLE_LEGACY_CSS_VENDOR_PREFIXES);$(ENABLE_LEGACY_ENCRYPTED_MEDIA);$(ENABLE_LINK_PRERENDER);$(ENABLE_MATHML);$(ENABLE_METER_ELEMENT);$(ENABLE_MICRODATA);$(ENABLE_MOUSE_CURSOR_SCALE);$(ENABLE_NOTIFICATIONS);$(ENABLE_QUOTA);$(ENABLE_STREAMS_API);$(ENABLE_SCRIPTED_SPEECH);$(ENABLE_SHARED_WORKERS);$(ENABLE_MEDIA_CONTROLS_SCRIPT);$(ENABLE_MEDIA_SOURCE);$(ENABLE_MEDIA_STATISTICS);$(ENABLE_SQL_DATABASE);$(ENABLE_STYLE_SCOPED);$(ENABLE_SUBPIXEL_LAYOUT);$(ENABLE_SVG_DOM_OBJC_BINDINGS);$(ENABLE_SVG_FONTS);$(ENABLE_VIDEO);$(ENABLE_VIDEO_TRACK);$(ENABLE_WEB_AUDIO);$(ENABLE_WEBGL);$(ENABLE_WEBGPU);$(ENABLE_WEBXR);$(ENABLE_XHR_TIMEOUT);$(ENABLE_XSLT);%(PreprocessorDefinitions)</PreprocessorDefinitions>
>     </ClCompile>
>   </ItemDefinitionGroup>
>   <ItemGroup>
>diff --git a/Source/cmake/tools/vsprops/FeatureDefinesCairo.props b/Source/cmake/tools/vsprops/FeatureDefinesCairo.props
>index 24b94bc7063640ac885b65feec13e31316753527..d7194b2d9054eede1fa62bb12451572bbabc31f7 100644
>--- a/Source/cmake/tools/vsprops/FeatureDefinesCairo.props
>+++ b/Source/cmake/tools/vsprops/FeatureDefinesCairo.props
>@@ -65,6 +65,7 @@
>     <ENABLE_WEB_AUTHN />
>     <ENABLE_WEBGL>ENABLE_WEBGL</ENABLE_WEBGL>
>     <ENABLE_WEBGPU />
>+    <ENABLE_WEBXR />
>     <ENABLE_XHR_TIMEOUT>ENABLE_XHR_TIMEOUT</ENABLE_XHR_TIMEOUT>
>     <ENABLE_XSLT>ENABLE_XSLT</ENABLE_XSLT>
>   </PropertyGroup>
>@@ -73,7 +74,7 @@
>   </PropertyGroup>
>   <ItemDefinitionGroup>
>     <ClCompile>
>-      <PreprocessorDefinitions>$(ENABLE_3D_TRANSFORMS);$(ENABLE_ACCELERATED_2D_CANVAS);$(ENABLE_OVERFLOW_SCROLLING_TOUCH);$(ENABLE_ATTACHMENT_ELEMENT);$(ENABLE_CHANNEL_MESSAGING);$(ENABLE_CSS3_CONDITIONAL_RULES);$(ENABLE_CSS_IMAGE_SET);$(ENABLE_CSS3_TEXT);$(ENABLE_CSS_BOX_DECORATION_BREAK);$(ENABLE_CSS_SHADERS);$(ENABLE_CSS_COMPOSITING);$(ENABLE_CSS_SELECTORS_LEVEL4);$(ENABLE_CSS_SHAPE_INSIDE);$(ENABLE_CSS_TRANSFORMS_ANIMATIONS_TRANSITIONS_UNPREFIXED);$(ENABLE_CURSOR_VISIBILITY);$(ENABLE_CUSTOM_SCHEME_HANDLER);$(ENABLE_DARK_MODE_CSS);$(ENABLE_DATAGRID);$(ENABLE_DATALIST_ELEMENT);$(ENABLE_DEVICE_ORIENTATION);$(ENABLE_DIRECTORY_UPLOAD);$(ENABLE_ENCRYPTED_MEDIA);$(ENABLE_FETCH_API);$(ENABLE_FILE_SYSTEM);$(ENABLE_FULLSCREEN_API);$(ENABLE_GAMEPAD);$(ENABLE_GEOLOCATION);$(ENABLE_HIGH_DPI_CANVAS);$(ENABLE_INDEXED_DATABASE);$(ENABLE_INPUT_TYPE_COLOR);$(ENABLE_INPUT_SPEECH);$(ENABLE_INPUT_TYPE_DATE);$(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE);$(ENABLE_INPUT_TYPE_DATETIMELOCAL);$(ENABLE_INPUT_TYPE_MONTH);$(ENABLE_INPUT_TYPE_TIME);$(ENABLE_INPUT_TYPE_WEEK);$(ENABLE_INTL);$(ENABLE_LEGACY_CSS_VENDOR_PREFIXES);$(ENABLE_LEGACY_ENCRYPTED_MEDIA);$(ENABLE_LINK_PRERENDER);$(ENABLE_MATHML);$(ENABLE_METER_ELEMENT);$(ENABLE_MICRODATA);$(ENABLE_MOUSE_CURSOR_SCALE);$(ENABLE_NOTIFICATIONS);$(ENABLE_QUOTA);$(ENABLE_SCRIPTED_SPEECH);$(ENABLE_SHARED_WORKERS);$(ENABLE_MEDIA_CONTROLS_SCRIPT);$(ENABLE_MEDIA_SOURCE);$(ENABLE_MEDIA_STATISTICS);$(ENABLE_SQL_DATABASE);$(ENABLE_STYLE_SCOPED);$(ENABLE_SUBPIXEL_LAYOUT);$(ENABLE_SVG_DOM_OBJC_BINDINGS);$(ENABLE_SVG_FONTS);$(ENABLE_VIDEO);$(ENABLE_VIDEO_TRACK);$(ENABLE_WEB_AUDIO);$(ENABLE_WEBGL);$(ENABLE_XHR_TIMEOUT);$(ENABLE_XSLT);%(PreprocessorDefinitions)</PreprocessorDefinitions>
>+      <PreprocessorDefinitions>$(ENABLE_3D_TRANSFORMS);$(ENABLE_ACCELERATED_2D_CANVAS);$(ENABLE_OVERFLOW_SCROLLING_TOUCH);$(ENABLE_ATTACHMENT_ELEMENT);$(ENABLE_CHANNEL_MESSAGING);$(ENABLE_CSS3_CONDITIONAL_RULES);$(ENABLE_CSS_IMAGE_SET);$(ENABLE_CSS3_TEXT);$(ENABLE_CSS_BOX_DECORATION_BREAK);$(ENABLE_CSS_SHADERS);$(ENABLE_CSS_COMPOSITING);$(ENABLE_CSS_SELECTORS_LEVEL4);$(ENABLE_CSS_SHAPE_INSIDE);$(ENABLE_CSS_TRANSFORMS_ANIMATIONS_TRANSITIONS_UNPREFIXED);$(ENABLE_CURSOR_VISIBILITY);$(ENABLE_CUSTOM_SCHEME_HANDLER);$(ENABLE_DARK_MODE_CSS);$(ENABLE_DATAGRID);$(ENABLE_DATALIST_ELEMENT);$(ENABLE_DEVICE_ORIENTATION);$(ENABLE_DIRECTORY_UPLOAD);$(ENABLE_ENCRYPTED_MEDIA);$(ENABLE_FETCH_API);$(ENABLE_FILE_SYSTEM);$(ENABLE_FULLSCREEN_API);$(ENABLE_GAMEPAD);$(ENABLE_GEOLOCATION);$(ENABLE_HIGH_DPI_CANVAS);$(ENABLE_INDEXED_DATABASE);$(ENABLE_INPUT_TYPE_COLOR);$(ENABLE_INPUT_SPEECH);$(ENABLE_INPUT_TYPE_DATE);$(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE);$(ENABLE_INPUT_TYPE_DATETIMELOCAL);$(ENABLE_INPUT_TYPE_MONTH);$(ENABLE_INPUT_TYPE_TIME);$(ENABLE_INPUT_TYPE_WEEK);$(ENABLE_INTL);$(ENABLE_LEGACY_CSS_VENDOR_PREFIXES);$(ENABLE_LEGACY_ENCRYPTED_MEDIA);$(ENABLE_LINK_PRERENDER);$(ENABLE_MATHML);$(ENABLE_METER_ELEMENT);$(ENABLE_MICRODATA);$(ENABLE_MOUSE_CURSOR_SCALE);$(ENABLE_NOTIFICATIONS);$(ENABLE_QUOTA);$(ENABLE_SCRIPTED_SPEECH);$(ENABLE_SHARED_WORKERS);$(ENABLE_MEDIA_CONTROLS_SCRIPT);$(ENABLE_MEDIA_SOURCE);$(ENABLE_MEDIA_STATISTICS);$(ENABLE_SQL_DATABASE);$(ENABLE_STYLE_SCOPED);$(ENABLE_SUBPIXEL_LAYOUT);$(ENABLE_SVG_DOM_OBJC_BINDINGS);$(ENABLE_SVG_FONTS);$(ENABLE_VIDEO);$(ENABLE_VIDEO_TRACK);$(ENABLE_WEB_AUDIO);$(ENABLE_WEBGL);$(ENABLE_WEBXR);$(ENABLE_XHR_TIMEOUT);$(ENABLE_XSLT);%(PreprocessorDefinitions)</PreprocessorDefinitions>
>     </ClCompile>
>   </ItemDefinitionGroup>
>   <ItemGroup>
>diff --git a/Tools/ChangeLog b/Tools/ChangeLog
>index 923925224a0f9e4fd28f4652c9f7edff2ff249fd..ea6b980180f0c706e5f3734ae272fb2dce7a4d15 100644
>--- a/Tools/ChangeLog
>+++ b/Tools/ChangeLog
>@@ -1,3 +1,13 @@
>+2020-03-13  Sergio Villar Senin  <svillar@igalia.com>
>+
>+        [WebXR] IDLs, stubs and build configuration for WPE
>+        https://bugs.webkit.org/show_bug.cgi?id=208702
>+
>+        Reviewed by Dean Jackson.
>+
>+        * Scripts/webkitperl/FeatureList.pm: Added WebXR.
>+        * TestWebKitAPI/Configurations/FeatureDefines.xcconfig: Added ENABLE_WEBXR, off by default.
>+
> 2020-03-15  Fujii Hironori  <Hironori.Fujii@sony.com>
> 
>         KeyedDecoderGeneric fails to allocate Vector while decoding broken data
>diff --git a/Tools/Scripts/webkitperl/FeatureList.pm b/Tools/Scripts/webkitperl/FeatureList.pm
>index 1c84015cafbc52ec9eb5b7226f698398cc5e5f0b..763aa2e8329170ecbc6870f4cc96b930a61739ae 100644
>--- a/Tools/Scripts/webkitperl/FeatureList.pm
>+++ b/Tools/Scripts/webkitperl/FeatureList.pm
>@@ -189,6 +189,7 @@ my (
>     $webgl2Support,
>     $webglSupport,
>     $webgpuSupport,
>+    $webXRSupport,
>     $wirelessPlaybackTargetSupport,
>     $xsltSupport,
> );
>@@ -595,6 +596,9 @@ my @features = (
>     { option => "webgpu", desc => "Toggle WebGPU support",
>       define => "ENABLE_WEBGPU", value => \$webgpuSupport },
> 
>+    { option => "webxr", desc => "Toggle WebXR support",
>+      define => "ENABLE_WEBXR", value => \$webXRSupport },
>+
>     { option => "web-api-statistics", desc => "Toggle Web API statistics support",
>       define => "ENABLE_WEB_API_STATISTICS", value => \$webAPIStatisticsSupport },
> 
>diff --git a/Tools/TestWebKitAPI/Configurations/FeatureDefines.xcconfig b/Tools/TestWebKitAPI/Configurations/FeatureDefines.xcconfig
>index e6a30029a01df1802ebf72f58fa8411581e801b4..cfbb7295135f01b4c7476519d4687e6c6f1be345 100644
>--- a/Tools/TestWebKitAPI/Configurations/FeatureDefines.xcconfig
>+++ b/Tools/TestWebKitAPI/Configurations/FeatureDefines.xcconfig
>@@ -394,6 +394,8 @@ ENABLE_WEBGPU_appletvos = ENABLE_WEBGPU;
> ENABLE_WEBGPU_macosx = $(ENABLE_WEBGPU$(WK_MACOS_1014));
> ENABLE_WEBGPU_MACOS_SINCE_1014 = ENABLE_WEBGPU;
> 
>+ENABLE_WEBXR = ;
>+
> ENABLE_WEB_API_STATISTICS = ;
> 
> ENABLE_WEB_AUDIO = ENABLE_WEB_AUDIO;
>@@ -414,4 +416,4 @@ ENABLE_WIRELESS_PLAYBACK_TARGET = ENABLE_WIRELESS_PLAYBACK_TARGET;
> 
> ENABLE_XSLT = ENABLE_XSLT;
> 
>-FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCESSIBILITY_ISOLATED_TREE) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLE_PAY_SESSION_V9) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_CONIC_GRADIENTS) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_PAINTING_API) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CSS_TYPED_OM) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_C_LOOP) $(ENABLE_DARK_MODE_CSS) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FULLSCREEN_API) $(ENABLE_PICTURE_IN_PICTURE_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_GPU_PROCESS) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INSPECTOR_ALTERNATE_DISPATCHERS) $(ENABLE_INSPECTOR_TELEMETRY) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_MEMORY_SAMPLER) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NETWORK_CACHE_SPECULATIVE_REVALIDATION) $(ENABLE_NETWORK_CACHE_STALE_WHILE_REVALIDATE) $(ENABLE_NOTIFICATIONS) $(ENABLE_OFFSCREEN_CANVAS) $(ENABLE_OVERFLOW_SCROLLING_TOUCH) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESIZE_OBSERVER) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_LOAD_STATISTICS) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SANDBOX_EXTENSIONS) $(ENABLE_SERVER_PRECONNECT) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SHAREABLE_RESOURCE) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USERSELECT_ALL) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEBDRIVER_MOUSE_INTERACTIONS) $(ENABLE_WEBDRIVER_KEYBOARD_INTERACTIONS) $(ENABLE_WEBDRIVER_TOUCH_INTERACTIONS) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WEB_API_STATISTICS) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_CRYPTO) $(ENABLE_WEB_RTC) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>+FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCESSIBILITY_ISOLATED_TREE) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLE_PAY_SESSION_V9) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_CONIC_GRADIENTS) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_PAINTING_API) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CSS_TYPED_OM) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_C_LOOP) $(ENABLE_DARK_MODE_CSS) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FULLSCREEN_API) $(ENABLE_PICTURE_IN_PICTURE_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_GPU_PROCESS) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INSPECTOR_ALTERNATE_DISPATCHERS) $(ENABLE_INSPECTOR_TELEMETRY) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_MEMORY_SAMPLER) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NETWORK_CACHE_SPECULATIVE_REVALIDATION) $(ENABLE_NETWORK_CACHE_STALE_WHILE_REVALIDATE) $(ENABLE_NOTIFICATIONS) $(ENABLE_OFFSCREEN_CANVAS) $(ENABLE_OVERFLOW_SCROLLING_TOUCH) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESIZE_OBSERVER) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_LOAD_STATISTICS) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SANDBOX_EXTENSIONS) $(ENABLE_SERVER_PRECONNECT) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SHAREABLE_RESOURCE) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USERSELECT_ALL) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEBDRIVER_MOUSE_INTERACTIONS) $(ENABLE_WEBDRIVER_KEYBOARD_INTERACTIONS) $(ENABLE_WEBDRIVER_TOUCH_INTERACTIONS) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WEBXR) $(ENABLE_WEB_API_STATISTICS) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_CRYPTO) $(ENABLE_WEB_RTC) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>diff --git a/ChangeLog b/ChangeLog
>index fa0a12dfe28b12a0db59c29904228418b48b2978..a42d69e620dea360cc3815ed089507947e962b32 100644
>--- a/ChangeLog
>+++ b/ChangeLog
>@@ -1,3 +1,25 @@
>+2020-03-13  Sergio Villar Senin  <svillar@igalia.com>
>+
>+        [WebXR] IDLs, stubs and build configuration for WPE
>+        https://bugs.webkit.org/show_bug.cgi?id=208702
>+
>+        Reviewed by Dean Jackson.
>+
>+        Added a new compile flag for WEBXR which depends on WEBGL.
>+
>+        For the WPE port, added OpenXR detection and USE_OPENXR define to be
>+        used in the sources. It also adds a dependency between USE_OPENXR and
>+        ENABLE_WEBXR.
>+
>+        Largely based on previous work by Å½an DoberÅ¡ek.
>+
>+        * Source/cmake/FindOpenXR.cmake: Added.
>+        * Source/cmake/OptionsWPE.cmake: Added mandatory OpenXR dependency if
>+        WEBXR is enabled exposing USE_OPENXR to the build.
>+        * Source/cmake/WebKitFeatures.cmake: Added ENABLE_WEBXR.
>+        * Source/cmake/tools/vsprops/FeatureDefines.props: Ditto.
>+        * Source/cmake/tools/vsprops/FeatureDefinesCairo.props: Ditto.
>+
> 2020-03-14  Michael Catanzaro  <mcatanzaro@gnome.org>
> 
>         [CMake] Warning when ccache is not installed

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Attachments on bug 208702: 392699 | 392700 | 393019 | 393046 | 393218 | 393250 | 393527 | 393533 | 393612 | 393613 | 393639