Attachment 393218 Details for Bug 208702 – Patch

[patch] Patch

bug-208702-20200311120709.patch (text/plain), 260.21 KB, created by Sergio Villar Senin on 2020-03-11 04:07:12 PDT

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Creator: Sergio Villar Senin

Created: 2020-03-11 04:07:12 PDT

Size: 260.21 KB

patch

obsolete

>Subversion Revision: 257837
>diff --git a/Source/WTF/ChangeLog b/Source/WTF/ChangeLog
>index 69712f60ef233a41479e0cdd5bbfc3892e155982..c52b5305235e62df188c615c246c6b0d0e628828 100644
>--- a/Source/WTF/ChangeLog
>+++ b/Source/WTF/ChangeLog
>@@ -1,3 +1,17 @@
>+2020-03-06  Sergio Villar Senin  <svillar@igalia.com>
>+
>+        [WebXR] IDLs, stubs and build configuration for WPE
>+        https://bugs.webkit.org/show_bug.cgi?id=208702
>+
>+        Define USE_OPENXR (disabled) if it was not defined by the build system just in case
>+        ENABLE_WEBGL is defined and active.
>+
>+        Largely based on previous work by Å½an DoberÅ¡ek.
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * wtf/Platform.h:
>+
> 2020-03-03  Megan Gardner  <megan_gardner@apple.com>
> 
>         Build Fix
>diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
>index 7969d2bbd91fd5f51b96f605f5ccbb97c191d928..18c670ad103b0f8331f778ce817c4d4966e9dfad 100644
>--- a/Source/WebCore/ChangeLog
>+++ b/Source/WebCore/ChangeLog
>@@ -1,3 +1,215 @@
>+2020-03-06  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 NOBODY (OOPS!).
>+
>+        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:
>+        * 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/XRBoundedReferenceSpace.cpp: Added.
>+        (WebCore::XRBoundedReferenceSpace::boundsGeometry const):
>+        * Modules/webxr/XRBoundedReferenceSpace.h: Added.
>+        * Modules/webxr/XRBoundedReferenceSpace.idl: Added.
>+        * Modules/webxr/XREnvironmentBlendMode.h: Added.
>+        * Modules/webxr/XREnvironmentBlendMode.idl: Added.
>+        * Modules/webxr/XREye.h: Added.
>+        * Modules/webxr/XREye.idl: Added.
>+        * Modules/webxr/XRFrame.cpp: Added.
>+        (WebCore::XRFrame::create):
>+        (WebCore::XRFrame::XRFrame):
>+        (WebCore::XRFrame::session const):
>+        (WebCore::XRFrame::getViewerPose):
>+        (WebCore::XRFrame::getPose):
>+        * Modules/webxr/XRFrame.h: Added.
>+        * Modules/webxr/XRFrame.idl: Added.
>+        * Modules/webxr/XRFrameRequestCallback.h: Added.
>+        * Modules/webxr/XRFrameRequestCallback.idl: Added.
>+        * Modules/webxr/XRHandedness.h: Added.
>+        * Modules/webxr/XRHandedness.idl: Added.
>+        * Modules/webxr/XRInputSource.cpp: Added.
>+        (WebCore::XRInputSource::create):
>+        (WebCore::XRInputSource::XRInputSource):
>+        (WebCore::XRInputSource::handedness const):
>+        (WebCore::XRInputSource::targetRayMode const):
>+        (WebCore::XRInputSource::targetRaySpace const):
>+        (WebCore::XRInputSource::gripSpace const):
>+        (WebCore::XRInputSource::profiles const):
>+        * Modules/webxr/XRInputSource.h: Added.
>+        * Modules/webxr/XRInputSource.idl: Added.
>+        * Modules/webxr/XRInputSourceArray.cpp: Added.
>+        (WebCore::XRInputSourceArray::length const):
>+        (WebCore::XRInputSourceArray::item const):
>+        * Modules/webxr/XRInputSourceArray.h: Added.
>+        * Modules/webxr/XRInputSourceArray.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/XRPose.cpp: Added.
>+        (WebCore::XRPose::create):
>+        (WebCore::XRPose::XRPose):
>+        (WebCore::XRPose::transform const):
>+        (WebCore::XRPose::emulatedPosition const):
>+        * Modules/webxr/XRPose.h: Added.
>+        * Modules/webxr/XRPose.idl: Added.
>+        * Modules/webxr/XRReferenceSpace.cpp: Added.
>+        (WebCore::XRReferenceSpace::XRReferenceSpace):
>+        (WebCore::XRReferenceSpace::getOffsetReferenceSpace):
>+        * Modules/webxr/XRReferenceSpace.h: Added.
>+        * Modules/webxr/XRReferenceSpace.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/XRRenderState.cpp: Added.
>+        (WebCore::XRRenderState::create):
>+        (WebCore::XRRenderState::XRRenderState):
>+        (WebCore::XRRenderState::depthNear const):
>+        (WebCore::XRRenderState::depthFar const):
>+        (WebCore::XRRenderState::inlineVerticalFieldOfView const):
>+        (WebCore::XRRenderState::baseLayer const):
>+        * Modules/webxr/XRRenderState.h: Added.
>+        * Modules/webxr/XRRenderState.idl: Added.
>+        * Modules/webxr/XRRenderStateInit.h: Added.
>+        * Modules/webxr/XRRenderStateInit.idl: Added.
>+        * Modules/webxr/XRRigidTransform.cpp: Added.
>+        (WebCore::XRRigidTransform::create):
>+        (WebCore::XRRigidTransform::XRRigidTransform):
>+        (WebCore::XRRigidTransform::position const):
>+        (WebCore::XRRigidTransform::orientation const):
>+        (WebCore::XRRigidTransform::matrix const):
>+        (WebCore::XRRigidTransform::inverse const):
>+        * Modules/webxr/XRRigidTransform.h: Added.
>+        * Modules/webxr/XRRigidTransform.idl: Added.
>+        * Modules/webxr/XRSession.cpp: Added.
>+        (WebCore::XRSession::environmentBlendMode const):
>+        (WebCore::XRSession::visibilityState const):
>+        (WebCore::XRSession::renderState const):
>+        (WebCore::XRSession::inputSources const):
>+        (WebCore::XRSession::updateRenderState):
>+        (WebCore::XRSession::requestReferenceSpace):
>+        (WebCore::XRSession::requestAnimationFrame):
>+        (WebCore::XRSession::cancelAnimationFrame):
>+        (WebCore::XRSession::end):
>+        (WebCore::XRSession::activeDOMObjectName const):
>+        (WebCore::XRSession::stop):
>+        * Modules/webxr/XRSession.h: Added.
>+        * Modules/webxr/XRSession.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/XRSpace.cpp: Added.
>+        (WebCore::XRSpace::XRSpace):
>+        * Modules/webxr/XRSpace.h: Added.
>+        * Modules/webxr/XRSpace.idl: Added.
>+        * Modules/webxr/XRSystem.cpp: Added.
>+        (WebCore::XRSystem::create):
>+        (WebCore::XRSystem::XRSystem):
>+        (WebCore::XRSystem::isSessionSupported):
>+        (WebCore::XRSystem::requestSession):
>+        (WebCore::XRSystem::activeDOMObjectName const):
>+        (WebCore::XRSystem::stop):
>+        * Modules/webxr/XRSystem.h: Added.
>+        * Modules/webxr/XRSystem.idl: Added.
>+        * Modules/webxr/XRTargetRayMode.h: Added.
>+        * Modules/webxr/XRTargetRayMode.idl: Added.
>+        * Modules/webxr/XRView.cpp: Added.
>+        (WebCore::XRView::create):
>+        (WebCore::XRView::XRView):
>+        (WebCore::XRView::eye const):
>+        (WebCore::XRView::projectionMatrix const):
>+        (WebCore::XRView::transform const):
>+        * Modules/webxr/XRView.h: Added.
>+        * Modules/webxr/XRView.idl: Added.
>+        * Modules/webxr/XRViewerPose.cpp: Added.
>+        (WebCore::XRViewerPose::create):
>+        (WebCore::XRViewerPose::views const):
>+        * Modules/webxr/XRViewerPose.h: Added.
>+        * Modules/webxr/XRViewerPose.idl: Added.
>+        * Modules/webxr/XRViewport.cpp: Added.
>+        (WebCore::XRViewport::create):
>+        (WebCore::XRViewport::x const):
>+        (WebCore::XRViewport::y const):
>+        (WebCore::XRViewport::width const):
>+        (WebCore::XRViewport::height const):
>+        * Modules/webxr/XRViewport.h: Added.
>+        * Modules/webxr/XRViewport.idl: Added.
>+        * Modules/webxr/XRVisibilityState.h: Added.
>+        * Modules/webxr/XRVisibilityState.idl: Added.
>+        * Modules/webxr/XRWebGLLayer.cpp: Added.
>+        (WebCore::XRWebGLLayer::create):
>+        (WebCore::XRWebGLLayer::XRWebGLLayer):
>+        (WebCore::XRWebGLLayer::antialias const):
>+        (WebCore::XRWebGLLayer::ignoreDepthValues const):
>+        (WebCore::XRWebGLLayer::framebuffer const):
>+        (WebCore::XRWebGLLayer::framebufferWidth const):
>+        (WebCore::XRWebGLLayer::framebufferHeight const):
>+        (WebCore::XRWebGLLayer::getViewport):
>+        (WebCore::XRWebGLLayer::getNativeFramebufferScaleFactor):
>+        * Modules/webxr/XRWebGLLayer.h: Added.
>+        * Modules/webxr/XRWebGLLayer.idl: Added.
>+        * Modules/webxr/XRWebGLLayerInit.h: Added.
>+        * Modules/webxr/XRWebGLLayerInit.idl: Added.
>+        * PlatformWPE.cmake: Add OpenXR includes and libs.
>+        * Sources.txt:
>+        * WebCore.xcodeproj/project.pbxproj:
>+        * bindings/IDLTypes.h:
>+        * bindings/js/JSDOMConvertSequences.h:
>+        * bindings/js/WebCoreBuiltinNames.h:
>+        * dom/EventNames.h:
>+        * dom/EventNames.in:
>+        * dom/EventTargetFactory.in:
>+        * page/RuntimeEnabledFeatures.h: Added WebXR feature.
>+        (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):
>+        (PlatformXR::resultToString):
>+        (PlatformXR::Instance::Impl::Impl):
>+        (PlatformXR::Instance::Impl::~Impl):
>+        (PlatformXR::Instance::singleton):
>+
> 2020-03-04  Carlos Garcia Campos  <cgarcia@igalia.com>
> 
>         [GTK][WPE] Use restore view icon for exit fullscreen button in media controls
>diff --git a/Source/WebKit/ChangeLog b/Source/WebKit/ChangeLog
>index 7f4977f372706d330aaef1c3933500ac40642925..bce2b84ff9179a19b21bab10208eace0e2c56544 100644
>--- a/Source/WebKit/ChangeLog
>+++ b/Source/WebKit/ChangeLog
>@@ -1,3 +1,14 @@
>+2020-03-06  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 NOBODY (OOPS!).
>+
>+        Largely based on previous work by Å½an DoberÅ¡ek.
>+
>+        * Shared/WebPreferences.yaml: Added info about the WebXR implementation status.
>+
> 2020-03-03  Devin Rousso  <drousso@apple.com>
> 
>         Web Inspector: re-add `InspectorFrontendHost` support for moving the inspected window
>diff --git a/Source/WTF/wtf/Platform.h b/Source/WTF/wtf/Platform.h
>index dedfa14d5a5ddda84e335bfd485e755097faec57..daa7d363a54e22432db49e781c83113725adc30e 100644
>--- a/Source/WTF/wtf/Platform.h
>+++ b/Source/WTF/wtf/Platform.h
>@@ -180,6 +180,10 @@
> #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
>+
>+#if !defined(USE_OPENXR)
>+#define USE_OPENXR 0
>+#endif
> #endif
> 
> #if USE(TEXTURE_MAPPER) && ENABLE(GRAPHICS_CONTEXT_GL) && !defined(USE_TEXTURE_MAPPER_GL)
>diff --git a/Source/WebCore/CMakeLists.txt b/Source/WebCore/CMakeLists.txt
>index 37cb1bee49c7e955a7124d1e2d6ae9cd155c079b..a926f2b7472d96c125369050987e07e0e2629d71 100644
>--- a/Source/WebCore/CMakeLists.txt
>+++ b/Source/WebCore/CMakeLists.txt
>@@ -1179,6 +1179,47 @@ if (ENABLE_GAMEPAD)
>     )
> endif ()
> 
>+if (ENABLE_WEBGL)
>+    list(APPEND WebCore_PRIVATE_INCLUDE_DIRECTORIES
>+        "${WEBCORE_DIR}/Modules/webxr"
>+        "${WEBCORE_DIR}/platform/xr"
>+    )
>+
>+    list(APPEND WebCore_NON_SVG_IDL_FILES
>+        Modules/webxr/NavigatorWebXR.idl
>+        Modules/webxr/XRBoundedReferenceSpace.idl
>+        Modules/webxr/XREnvironmentBlendMode.idl
>+        Modules/webxr/XREye.idl
>+        Modules/webxr/XRFrame.idl
>+        Modules/webxr/XRFrameRequestCallback.idl
>+        Modules/webxr/XRHandedness.idl
>+        Modules/webxr/XRInputSource.idl
>+        Modules/webxr/XRInputSourceArray.idl
>+        Modules/webxr/XRInputSourceEvent.idl
>+        Modules/webxr/XRInputSourcesChangeEvent.idl
>+        Modules/webxr/XRPose.idl
>+        Modules/webxr/XRReferenceSpace.idl
>+        Modules/webxr/XRReferenceSpaceEvent.idl
>+        Modules/webxr/XRReferenceSpaceType.idl
>+        Modules/webxr/XRRenderState.idl
>+        Modules/webxr/XRRenderStateInit.idl
>+        Modules/webxr/XRRigidTransform.idl
>+        Modules/webxr/XRSession.idl
>+        Modules/webxr/XRSessionEvent.idl
>+        Modules/webxr/XRSessionInit.idl
>+        Modules/webxr/XRSessionMode.idl
>+        Modules/webxr/XRSpace.idl
>+        Modules/webxr/XRSystem.idl
>+        Modules/webxr/XRTargetRayMode.idl
>+        Modules/webxr/XRView.idl
>+        Modules/webxr/XRViewerPose.idl
>+        Modules/webxr/XRViewport.idl
>+        Modules/webxr/XRVisibilityState.idl
>+        Modules/webxr/XRWebGLLayer.idl
>+        Modules/webxr/XRWebGLLayerInit.idl
>+    )
>+endif ()
>+
> set(WebCore_IDL_FILES
>     ${WebCore_NON_SVG_IDL_FILES}
>     ${WebCore_SVG_IDL_FILES}
>diff --git a/Source/WebCore/DerivedSources.make b/Source/WebCore/DerivedSources.make
>index 5ba26b8082de68901c2e12662f6474a867072423..f956715c56d2cc7345b81299dea3d2ce51e41a39 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/XRBoundedReferenceSpace.idl \
>+    $(WebCore)/Modules/webxr/XREnvironmentBlendMode.idl \
>+    $(WebCore)/Modules/webxr/XREye.idl \
>+    $(WebCore)/Modules/webxr/XRFrame.idl \
>+    $(WebCore)/Modules/webxr/XRFrameRequestCallback.idl \
>+    $(WebCore)/Modules/webxr/XRHandedness.idl \
>+    $(WebCore)/Modules/webxr/XRInputSource.idl \
>+    $(WebCore)/Modules/webxr/XRInputSourceArray.idl \
>+    $(WebCore)/Modules/webxr/XRInputSourceEvent.idl \
>+    $(WebCore)/Modules/webxr/XRInputSourcesChangeEvent.idl \
>+    $(WebCore)/Modules/webxr/XRPose.idl \
>+    $(WebCore)/Modules/webxr/XRReferenceSpace.idl \
>+    $(WebCore)/Modules/webxr/XRReferenceSpaceEvent.idl \
>+    $(WebCore)/Modules/webxr/XRReferenceSpaceType.idl \
>+    $(WebCore)/Modules/webxr/XRRenderState.idl \
>+    $(WebCore)/Modules/webxr/XRRenderStateInit.idl \
>+    $(WebCore)/Modules/webxr/XRRigidTransform.idl \
>+    $(WebCore)/Modules/webxr/XRSession.idl \
>+    $(WebCore)/Modules/webxr/XRSessionEvent.idl \
>+    $(WebCore)/Modules/webxr/XRSessionInit.idl \
>+    $(WebCore)/Modules/webxr/XRSessionMode.idl \
>+    $(WebCore)/Modules/webxr/XRSpace.idl \
>+    $(WebCore)/Modules/webxr/XRSystem.idl \
>+    $(WebCore)/Modules/webxr/XRTargetRayMode.idl \
>+    $(WebCore)/Modules/webxr/XRView.idl \
>+    $(WebCore)/Modules/webxr/XRViewerPose.idl \
>+    $(WebCore)/Modules/webxr/XRViewport.idl \
>+    $(WebCore)/Modules/webxr/XRVisibilityState.idl \
>+    $(WebCore)/Modules/webxr/XRWebGLLayer.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..d3fa2b8269ea4ee5da646b8957f55a1e4fde92e3
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/NavigatorWebXR.cpp
>@@ -0,0 +1,53 @@
>+/*
>+ * 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"
>+
>+#include "Navigator.h"
>+#include "XRSystem.h"
>+
>+namespace WebCore {
>+
>+XRSystem& NavigatorWebXR::xr(ScriptExecutionContext& scriptExecutionContext, Navigator& navigatorObject)
>+{
>+    auto& navigator = NavigatorWebXR::from(navigatorObject);
>+    if (!navigator.m_xr)
>+        navigator.m_xr = XRSystem::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
>diff --git a/Source/WebCore/Modules/webxr/NavigatorWebXR.h b/Source/WebCore/Modules/webxr/NavigatorWebXR.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..b6c0f98e4981032eb26da311a1ecc48357f39cf4
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/NavigatorWebXR.h
>@@ -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.
>+ */
>+
>+#pragma once
>+
>+#include "Supplementable.h"
>+#include <wtf/RefPtr.h>
>+
>+namespace WebCore {
>+
>+class Navigator;
>+class ScriptExecutionContext;
>+class XRSystem;
>+
>+class NavigatorWebXR final : public Supplement<Navigator> {
>+    WTF_MAKE_FAST_ALLOCATED;
>+public:
>+    static XRSystem& xr(ScriptExecutionContext&, Navigator&);
>+
>+private:
>+    static NavigatorWebXR& from(Navigator&);
>+
>+    RefPtr<XRSystem> m_xr;
>+};
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/NavigatorWebXR.idl b/Source/WebCore/Modules/webxr/NavigatorWebXR.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..853ecf9594d2c4f4069329c93ebf46ba5ffe6ca5
>--- /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=WEBGL
>+] partial interface Navigator {
>+    [SecureContext, SameObject, CallWith=ScriptExecutionContext] readonly attribute XRSystem xr;
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRBoundedReferenceSpace.cpp b/Source/WebCore/Modules/webxr/XRBoundedReferenceSpace.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..35307bf7793a1eb2ef4266db2799ad38e4936edb
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRBoundedReferenceSpace.cpp
>@@ -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.
>+ */
>+
>+#include "config.h"
>+#include "XRBoundedReferenceSpace.h"
>+
>+namespace WebCore {
>+
>+const Vector<Ref<DOMPointReadOnly>>& XRBoundedReferenceSpace::boundsGeometry() const
>+{
>+    return m_boundsGeometry;
>+}
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRBoundedReferenceSpace.h b/Source/WebCore/Modules/webxr/XRBoundedReferenceSpace.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..7b5c8e95ddd5c399455265182c00c63c113519db
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRBoundedReferenceSpace.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
>+
>+#include "XRReferenceSpace.h"
>+#include <wtf/Ref.h>
>+#include <wtf/Vector.h>
>+
>+namespace WebCore {
>+
>+class DOMPointReadOnly;
>+
>+class XRBoundedReferenceSpace : public XRReferenceSpace {
>+public:
>+    virtual ~XRBoundedReferenceSpace();
>+
>+    const Vector<Ref<DOMPointReadOnly>>& boundsGeometry() const;
>+
>+private:
>+    Vector<Ref<DOMPointReadOnly>> m_boundsGeometry;
>+};
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRBoundedReferenceSpace.idl b/Source/WebCore/Modules/webxr/XRBoundedReferenceSpace.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..6c764c967c421d145dc48e5d3532d0de590663b6
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRBoundedReferenceSpace.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=WEBGL,
>+    SecureContext,
>+    Exposed=Window
>+] interface XRBoundedReferenceSpace : XRReferenceSpace {
>+    readonly attribute FrozenArray<DOMPointReadOnly> boundsGeometry;
>+};
>diff --git a/Source/WebCore/Modules/webxr/XREnvironmentBlendMode.h b/Source/WebCore/Modules/webxr/XREnvironmentBlendMode.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..fefac1ec80b02214f99aa2f2a790b55979cb9ae6
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XREnvironmentBlendMode.h
>@@ -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.
>+ */
>+
>+#pragma once
>+
>+namespace WebCore {
>+
>+enum class XREnvironmentBlendMode {
>+    Opaque,
>+    Additive,
>+    AlphaBlend
>+};
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XREnvironmentBlendMode.idl b/Source/WebCore/Modules/webxr/XREnvironmentBlendMode.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..949513ccc3a5f44c28057157a9aa5498eba041c6
>--- /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=WEBGL
>+] 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..01e70e54443564261d379c930b9d599d9212bf32
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XREye.h
>@@ -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.
>+ */
>+
>+#pragma once
>+
>+namespace WebCore {
>+
>+enum class XREye {
>+    None,
>+    Left,
>+    Right,
>+};
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XREye.idl b/Source/WebCore/Modules/webxr/XREye.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..c269a0f51204d8826b999dda1f021483542bb1fa
>--- /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=WEBGL
>+] enum XREye {
>+    "none",
>+    "left",
>+    "right"
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRFrame.cpp b/Source/WebCore/Modules/webxr/XRFrame.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..3c504ad1c9763dabd3e5868d30329848a7d411ac
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRFrame.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 "XRFrame.h"
>+
>+#include "XRSession.h"
>+#include "XRViewerPose.h"
>+#include <wtf/IsoMallocInlines.h>
>+
>+namespace WebCore {
>+
>+WTF_MAKE_ISO_ALLOCATED_IMPL(XRFrame);
>+
>+Ref<XRFrame> XRFrame::create(Ref<XRSession>&& session)
>+{
>+    return adoptRef(*new XRFrame(WTFMove(session)));
>+}
>+
>+XRFrame::XRFrame(Ref<XRSession>&& session)
>+    : m_session(WTFMove(session))
>+{
>+}
>+
>+XRFrame::~XRFrame() = default;
>+
>+const XRSession& XRFrame::session() const
>+{
>+    return m_session;
>+}
>+
>+RefPtr<XRViewerPose> XRFrame::getViewerPose(const XRReferenceSpace&)
>+{
>+    return { };
>+}
>+
>+RefPtr<XRPose> XRFrame::getPose(const XRSpace&, const XRSpace&)
>+{
>+    return { };
>+}
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRFrame.h b/Source/WebCore/Modules/webxr/XRFrame.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..f29ba505263d53e98c50368b445e4fec93753c48
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRFrame.h
>@@ -0,0 +1,58 @@
>+/*
>+ * 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 <wtf/IsoMalloc.h>
>+#include <wtf/Ref.h>
>+#include <wtf/RefCounted.h>
>+#include <wtf/RefPtr.h>
>+
>+namespace WebCore {
>+
>+class XRPose;
>+class XRReferenceSpace;
>+class XRSession;
>+class XRSpace;
>+class XRViewerPose;
>+
>+class XRFrame : public RefCounted<XRFrame> {
>+    WTF_MAKE_ISO_ALLOCATED(XRFrame);
>+public:
>+    static Ref<XRFrame> create(Ref<XRSession>&&);
>+    ~XRFrame();
>+
>+    const XRSession& session() const;
>+
>+    RefPtr<XRViewerPose> getViewerPose(const XRReferenceSpace&);
>+    RefPtr<XRPose> getPose(const XRSpace&, const XRSpace&);
>+
>+private:
>+    XRFrame(Ref<XRSession>&&);
>+
>+    Ref<XRSession> m_session;
>+};
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRFrame.idl b/Source/WebCore/Modules/webxr/XRFrame.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..92610dece888279851e02743c1712293770f3d5e
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRFrame.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=WEBGL,
>+    SecureContext,
>+    Exposed=Window,
>+    ImplementationLacksVTable
>+] interface XRFrame {
>+    [SameObject] readonly attribute XRSession session;
>+
>+    XRViewerPose? getViewerPose(XRReferenceSpace referenceSpace);
>+    XRPose? getPose(XRSpace space, XRSpace baseSpace);
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRFrameRequestCallback.h b/Source/WebCore/Modules/webxr/XRFrameRequestCallback.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..9958fdc2043781fa6f9978bc2bd7dec8420eb47f
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRFrameRequestCallback.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
>+
>+#include "ActiveDOMCallback.h"
>+#include "CallbackResult.h"
>+#include <wtf/RefCounted.h>
>+
>+namespace WebCore {
>+
>+class XRFrame;
>+
>+class XRFrameRequestCallback : public RefCounted<XRFrameRequestCallback>, public ActiveDOMCallback {
>+public:
>+    using ActiveDOMCallback::ActiveDOMCallback;
>+
>+    virtual CallbackResult<void> handleEvent(double highResTimeMs, XRFrame&) = 0;
>+};
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRFrameRequestCallback.idl b/Source/WebCore/Modules/webxr/XRFrameRequestCallback.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..d11d4bd2c586b1056a37d122c64fed19809ae505
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRFrameRequestCallback.idl
>@@ -0,0 +1,28 @@
>+/*
>+ * 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;
>+
>+callback XRFrameRequestCallback = void (DOMHighResTimeStamp time, XRFrame frame);
>diff --git a/Source/WebCore/Modules/webxr/XRHandedness.h b/Source/WebCore/Modules/webxr/XRHandedness.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..e27aa39b3de2f7f86295ae93a81f4731dc9cd74b
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRHandedness.h
>@@ -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.
>+ */
>+
>+#pragma once
>+
>+namespace WebCore {
>+
>+enum class XRHandedness {
>+    None,
>+    Left,
>+    Right,
>+};
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRHandedness.idl b/Source/WebCore/Modules/webxr/XRHandedness.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..94fcb56d0f8728b5614dcc2e0291d270af28f15f
>--- /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=WEBGL
>+] enum XRHandedness {
>+    "none",
>+    "left",
>+    "right"
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRInputSource.cpp b/Source/WebCore/Modules/webxr/XRInputSource.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..62bb422b785ad32ac41e11c9b87c37d7fae8f9b3
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRInputSource.cpp
>@@ -0,0 +1,75 @@
>+/*
>+ * 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 "XRInputSource.h"
>+
>+#include "XRSpace.h"
>+#include <wtf/IsoMallocInlines.h>
>+
>+namespace WebCore {
>+
>+WTF_MAKE_ISO_ALLOCATED_IMPL(XRInputSource);
>+
>+Ref<XRInputSource> XRInputSource::create(Ref<XRSpace>&& targetRaySpace)
>+{
>+    return adoptRef(*new XRInputSource(WTFMove(targetRaySpace)));
>+}
>+
>+XRInputSource::XRInputSource(Ref<XRSpace>&& targetRaySpace)
>+    : m_handedness(XRHandedness::None)
>+    , m_targetRayMode(XRTargetRayMode::Gaze)
>+    , m_targetRaySpace(WTFMove(targetRaySpace))
>+{
>+}
>+
>+XRInputSource::~XRInputSource() = default;
>+
>+XRHandedness XRInputSource::handedness() const
>+{
>+    return m_handedness;
>+}
>+
>+XRTargetRayMode XRInputSource::targetRayMode() const
>+{
>+    return m_targetRayMode;
>+}
>+
>+const XRSpace& XRInputSource::targetRaySpace() const
>+{
>+    return m_targetRaySpace;
>+}
>+
>+RefPtr<XRSpace> XRInputSource::gripSpace() const
>+{
>+    return { };
>+}
>+
>+const Vector<String>& XRInputSource::profiles() const
>+{
>+    return m_profiles;
>+}
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRInputSource.h b/Source/WebCore/Modules/webxr/XRInputSource.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..1187f7039ae5d33f6b9056d447b7bf596303a6ae
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRInputSource.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
>+
>+#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 XRSpace;
>+
>+class XRInputSource : public RefCounted<XRInputSource> {
>+    WTF_MAKE_ISO_ALLOCATED(XRInputSource);
>+public:
>+    static Ref<XRInputSource> create(Ref<XRSpace>&&);
>+    ~XRInputSource();
>+
>+    XRHandedness handedness() const;
>+    XRTargetRayMode targetRayMode() const;
>+    const XRSpace& targetRaySpace() const;
>+    RefPtr<XRSpace> gripSpace() const;
>+    const Vector<String>& profiles() const;
>+
>+private:
>+    XRInputSource(Ref<XRSpace>&&);
>+
>+    XRHandedness m_handedness;
>+    XRTargetRayMode m_targetRayMode;
>+    Ref<XRSpace> m_targetRaySpace;
>+    Vector<String> m_profiles;
>+};
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRInputSource.idl b/Source/WebCore/Modules/webxr/XRInputSource.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..e6b4069f0cb4205d5086cb51613a48143496168b
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRInputSource.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=WEBGL,
>+    SecureContext,
>+    Exposed=Window,
>+    ImplementationLacksVTable
>+] interface XRInputSource {
>+    readonly attribute XRHandedness handedness;
>+    readonly attribute XRTargetRayMode targetRayMode ;
>+    [SameObject] readonly attribute XRSpace targetRaySpace;
>+    [SameObject] readonly attribute XRSpace? gripSpace ;
>+    [SameObject] readonly attribute FrozenArray<DOMString> profiles;
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRInputSourceArray.cpp b/Source/WebCore/Modules/webxr/XRInputSourceArray.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..7fd4c465daa3f73de64f41abd28a987cd64e0e80
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRInputSourceArray.cpp
>@@ -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.
>+ */
>+
>+#include "config.h"
>+#include "XRInputSourceArray.h"
>+
>+#include <wtf/IsoMallocInlines.h>
>+
>+namespace WebCore {
>+
>+WTF_MAKE_ISO_ALLOCATED_IMPL(XRInputSourceArray);
>+
>+unsigned XRInputSourceArray::length() const
>+{
>+    return 0;
>+}
>+
>+XRInputSource* XRInputSourceArray::item(unsigned) const
>+{
>+    return nullptr;
>+}
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRInputSourceArray.h b/Source/WebCore/Modules/webxr/XRInputSourceArray.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..95521b55fd159297590b64714e4c1f8c5056d7fc
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRInputSourceArray.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
>+
>+#include <wtf/IsoMalloc.h>
>+#include <wtf/RefCounted.h>
>+
>+namespace WebCore {
>+
>+class XRInputSource;
>+
>+class XRInputSourceArray : public RefCounted<XRInputSourceArray> {
>+    WTF_MAKE_ISO_ALLOCATED(XRInputSourceArray);
>+public:
>+    unsigned length() const;
>+    XRInputSource* item(unsigned) const;
>+};
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRInputSourceArray.idl b/Source/WebCore/Modules/webxr/XRInputSourceArray.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..f078034a6698a44e3f34d7187b7e1ccd1b5b7d83
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRInputSourceArray.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=WEBGL,
>+    SecureContext,
>+    Exposed=Window,
>+    ImplementationLacksVTable
>+] interface XRInputSourceArray {
>+    iterable<XRInputSource>;
>+    readonly attribute unsigned long length;
>+    getter XRInputSource(unsigned long index);
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRInputSourceEvent.cpp b/Source/WebCore/Modules/webxr/XRInputSourceEvent.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..ea47690bf33dd3122bca4cc8d79610c132c4ed32
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRInputSourceEvent.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 "XRInputSourceEvent.h"
>+
>+#include "XRFrame.h"
>+#include "XRInputSource.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 XRFrame& XRInputSourceEvent::frame() const
>+{
>+    return *m_frame;
>+}
>+
>+const XRInputSource& XRInputSourceEvent::inputSource() const
>+{
>+    return *m_inputSource;
>+}
>+
>+Optional<int> XRInputSourceEvent::buttonIndex() const
>+{
>+    return m_buttonIndex;
>+}
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRInputSourceEvent.h b/Source/WebCore/Modules/webxr/XRInputSourceEvent.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..43dc7c0e3c49105d4bd295a6066e6a735f0b5f15
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRInputSourceEvent.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
>+
>+#include "Event.h"
>+#include <wtf/Optional.h>
>+#include <wtf/RefPtr.h>
>+
>+namespace WebCore {
>+
>+class XRFrame;
>+class XRInputSource;
>+
>+class XRInputSourceEvent final : public Event {
>+public:
>+    struct Init : EventInit {
>+        RefPtr<XRFrame> frame;
>+        RefPtr<XRInputSource> inputSource;
>+        Optional<int> buttonIndex;
>+    };
>+
>+    static Ref<XRInputSourceEvent> create(const AtomString&, const Init&, IsTrusted = IsTrusted::No);
>+    virtual ~XRInputSourceEvent();
>+
>+    const XRFrame& frame() const;
>+    const XRInputSource& inputSource() const;
>+    Optional<int> buttonIndex() const;
>+
>+private:
>+    XRInputSourceEvent(const AtomString&, const Init&, IsTrusted);
>+
>+    RefPtr<XRFrame> m_frame;
>+    RefPtr<XRInputSource> m_inputSource;
>+    Optional<int> m_buttonIndex;
>+};
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRInputSourceEvent.idl b/Source/WebCore/Modules/webxr/XRInputSourceEvent.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..29bac6c8a172fef2b62f91bcab823be8bf96911d
>--- /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=WEBGL
>+] dictionary XRInputSourceEventInit : EventInit {
>+    required XRFrame frame;
>+    required XRInputSource inputSource;
>+};
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBGL,
>+    SecureContext,
>+    Exposed=Window,
>+    Constructor(DOMString type, XRInputSourceEventInit eventInitDict)
>+] interface XRInputSourceEvent : Event {
>+    [SameObject] readonly attribute XRFrame frame;
>+    [SameObject] readonly attribute XRInputSource inputSource;
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRInputSourcesChangeEvent.cpp b/Source/WebCore/Modules/webxr/XRInputSourcesChangeEvent.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..b9542ce132e56b5e0f44d5a4e2342b7590eee9c5
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRInputSourcesChangeEvent.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 "XRInputSourcesChangeEvent.h"
>+
>+#include "XRInputSource.h"
>+#include "XRSession.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 XRSession& XRInputSourcesChangeEvent::session() const
>+{
>+    return m_session;
>+}
>+
>+const Vector<RefPtr<XRInputSource>>& XRInputSourcesChangeEvent::added() const
>+{
>+    return m_added;
>+}
>+
>+const Vector<RefPtr<XRInputSource>>& XRInputSourcesChangeEvent::removed() const
>+{
>+    return m_removed;
>+}
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRInputSourcesChangeEvent.h b/Source/WebCore/Modules/webxr/XRInputSourcesChangeEvent.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..b192f2402587c1afa6ac2d71e33d355e7ceb4dd5
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRInputSourcesChangeEvent.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
>+
>+#include "Event.h"
>+#include <wtf/Ref.h>
>+#include <wtf/Vector.h>
>+
>+namespace WebCore {
>+
>+class XRInputSource;
>+class XRSession;
>+
>+class XRInputSourcesChangeEvent final : public Event {
>+public:
>+    struct Init : EventInit {
>+        RefPtr<XRSession> session;
>+        Vector<RefPtr<XRInputSource>> added;
>+        Vector<RefPtr<XRInputSource>> removed;
>+    };
>+
>+    static Ref<XRInputSourcesChangeEvent> create(const AtomString&, const Init&, IsTrusted = IsTrusted::No);
>+    virtual ~XRInputSourcesChangeEvent();
>+
>+    const XRSession& session() const;
>+    const Vector<RefPtr<XRInputSource>>& added() const;
>+    const Vector<RefPtr<XRInputSource>>& removed() const;
>+
>+private:
>+    XRInputSourcesChangeEvent(const AtomString&, const Init&, IsTrusted);
>+
>+    Ref<XRSession> m_session;
>+    Vector<RefPtr<XRInputSource>> m_added;
>+    Vector<RefPtr<XRInputSource>> m_removed;
>+};
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRInputSourcesChangeEvent.idl b/Source/WebCore/Modules/webxr/XRInputSourcesChangeEvent.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..a304f0d23d3134578f6ec68a12a462a0f86f1dbe
>--- /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=WEBGL
>+] dictionary XRInputSourcesChangeEventInit : EventInit {
>+    required XRSession session;
>+    required FrozenArray<XRInputSource> added;
>+    required FrozenArray<XRInputSource> removed;
>+};
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBGL,
>+    SecureContext,
>+    Exposed=Window,
>+    Constructor(DOMString type, XRInputSourcesChangeEventInit eventInitDict)
>+] interface XRInputSourcesChangeEvent : Event {
>+    [SameObject] readonly attribute XRSession session;
>+    [SameObject] readonly attribute FrozenArray<XRInputSource> added;
>+    [SameObject] readonly attribute FrozenArray<XRInputSource> removed;
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRPose.cpp b/Source/WebCore/Modules/webxr/XRPose.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..090354e6dc57f96459407754b90de5e208f8ec02
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRPose.cpp
>@@ -0,0 +1,58 @@
>+/*
>+ * 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 "XRPose.h"
>+
>+#include "XRRigidTransform.h"
>+#include <wtf/IsoMallocInlines.h>
>+
>+namespace WebCore {
>+
>+WTF_MAKE_ISO_ALLOCATED_IMPL(XRPose);
>+
>+Ref<XRPose> XRPose::create()
>+{
>+    return adoptRef(*new XRPose);
>+}
>+
>+XRPose::XRPose()
>+    : m_transform(XRRigidTransform::create())
>+{
>+}
>+
>+XRPose::~XRPose() = default;
>+
>+const XRRigidTransform& XRPose::transform() const
>+{
>+    return m_transform;
>+}
>+
>+bool XRPose::emulatedPosition() const
>+{
>+    return m_emulatedPosition;
>+}
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRPose.h b/Source/WebCore/Modules/webxr/XRPose.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..b14819ce24da92366a659be24cf4d7a2937927e4
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRPose.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
>+
>+#include <wtf/IsoMalloc.h>
>+#include <wtf/Ref.h>
>+#include <wtf/RefCounted.h>
>+
>+namespace WebCore {
>+
>+class XRRigidTransform;
>+
>+class XRPose : public RefCounted<XRPose> {
>+    WTF_MAKE_ISO_ALLOCATED(XRPose);
>+public:
>+    static Ref<XRPose> create();
>+    ~XRPose();
>+
>+    const XRRigidTransform& transform() const;
>+    bool emulatedPosition() const;
>+
>+protected:
>+    XRPose();
>+
>+    Ref<XRRigidTransform> m_transform;
>+    bool m_emulatedPosition { false };
>+};
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRPose.idl b/Source/WebCore/Modules/webxr/XRPose.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..f392769b6dbabc4a796f0b19535ba933a3ad709e
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRPose.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=WEBGL,
>+    SecureContext,
>+    Exposed=Window,
>+    ImplementationLacksVTable
>+] interface XRPose {
>+    [SameObject] readonly attribute XRRigidTransform transform;
>+    readonly attribute boolean emulatedPosition;
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRReferenceSpace.cpp b/Source/WebCore/Modules/webxr/XRReferenceSpace.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..337acbea5e897272e85b86917f2976f7767df88b
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRReferenceSpace.cpp
>@@ -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.
>+ */
>+
>+#include "config.h"
>+#include "XRReferenceSpace.h"
>+
>+namespace WebCore {
>+
>+XRReferenceSpace::XRReferenceSpace(ScriptExecutionContext& context)
>+    : XRSpace(context)
>+{
>+}
>+
>+XRReferenceSpace::~XRReferenceSpace() = default;
>+
>+Ref<XRReferenceSpace> XRReferenceSpace::getOffsetReferenceSpace(const XRRigidTransform&)
>+{
>+    return adoptRef(*new XRReferenceSpace(*scriptExecutionContext()));
>+}
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRReferenceSpace.h b/Source/WebCore/Modules/webxr/XRReferenceSpace.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..6fe14d483d4f580784e89b48f702f5a44a61e127
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRReferenceSpace.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
>+
>+#include "XRSpace.h"
>+
>+#include <wtf/Ref.h>
>+
>+namespace WebCore {
>+
>+class XRRigidTransform;
>+
>+class XRReferenceSpace : public XRSpace {
>+public:
>+    virtual ~XRReferenceSpace();
>+
>+    Ref<XRReferenceSpace> getOffsetReferenceSpace(const XRRigidTransform&);
>+
>+private:
>+    XRReferenceSpace(ScriptExecutionContext&);
>+};
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRReferenceSpace.idl b/Source/WebCore/Modules/webxr/XRReferenceSpace.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..2afdaecd5f1ac7517387a5423175242bb1541e21
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRReferenceSpace.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=WEBGL,
>+    SecureContext,
>+    Exposed=Window,
>+    JSGenerateToJSObject,
>+    JSGenerateToNativeObject
>+] interface XRReferenceSpace : XRSpace {
>+    [NewObject] XRReferenceSpace getOffsetReferenceSpace(XRRigidTransform originOffset);
>+
>+    attribute EventHandler onreset;
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRReferenceSpaceEvent.cpp b/Source/WebCore/Modules/webxr/XRReferenceSpaceEvent.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..8aa04a010d012a3a0bdc8e0e78be4d5bec1d4530
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRReferenceSpaceEvent.cpp
>@@ -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.
>+ */
>+
>+#include "config.h"
>+#include "XRReferenceSpaceEvent.h"
>+
>+#include "XRReferenceSpace.h"
>+#include "XRRigidTransform.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 XRReferenceSpace& XRReferenceSpaceEvent::referenceSpace() const
>+{
>+    return *m_referenceSpace;
>+}
>+
>+const XRRigidTransform& XRReferenceSpaceEvent::transform() const
>+{
>+    return *m_transform;
>+}
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRReferenceSpaceEvent.h b/Source/WebCore/Modules/webxr/XRReferenceSpaceEvent.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..d98d39fd28f0d902b0865fb8108e33d5d50ccebc
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRReferenceSpaceEvent.h
>@@ -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.
>+ */
>+
>+#pragma once
>+
>+#include "Event.h"
>+#include <wtf/Ref.h>
>+#include <wtf/RefPtr.h>
>+
>+namespace WebCore {
>+
>+class XRReferenceSpace;
>+class XRRigidTransform;
>+
>+class XRReferenceSpaceEvent : public Event {
>+public:
>+    struct Init : EventInit {
>+        RefPtr<XRReferenceSpace> referenceSpace;
>+        RefPtr<XRRigidTransform> transform;
>+    };
>+
>+    static Ref<XRReferenceSpaceEvent> create(const AtomString&, const Init&, IsTrusted = IsTrusted::No);
>+    virtual ~XRReferenceSpaceEvent();
>+
>+    const XRReferenceSpace& referenceSpace() const;
>+    const XRRigidTransform& transform() const;
>+
>+private:
>+    XRReferenceSpaceEvent(const AtomString&, const Init&, IsTrusted);
>+
>+    RefPtr<XRReferenceSpace> m_referenceSpace;
>+    RefPtr<XRRigidTransform> m_transform;
>+};
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRReferenceSpaceEvent.idl b/Source/WebCore/Modules/webxr/XRReferenceSpaceEvent.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..38601c477b0c5d2fe1fd55bdb8e1897f09e40833
>--- /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=WEBGL
>+] dictionary XRReferenceSpaceEventInit : EventInit {
>+    required XRReferenceSpace referenceSpace;
>+    XRRigidTransform transform;
>+};
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBGL,
>+    SecureContext,
>+    Exposed=Window,
>+    Constructor(DOMString type, XRReferenceSpaceEventInit eventInitDict)
>+] interface XRReferenceSpaceEvent : Event {
>+    [SameObject] readonly attribute XRReferenceSpace referenceSpace;
>+    [SameObject] readonly attribute XRRigidTransform transform;
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRReferenceSpaceType.h b/Source/WebCore/Modules/webxr/XRReferenceSpaceType.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..dea4f9d5e61fc374323c3f0316c5495c80d9875d
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRReferenceSpaceType.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
>+
>+namespace WebCore {
>+
>+enum class XRReferenceSpaceType {
>+    Viewer,
>+    Local,
>+    LocalFloor,
>+    BoundedFloor,
>+    Unbounded
>+};
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRReferenceSpaceType.idl b/Source/WebCore/Modules/webxr/XRReferenceSpaceType.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..85732fb16398e7f962f54c9f7a3b53ffe8d3851b
>--- /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=WEBGL
>+] enum XRReferenceSpaceType {
>+    "viewer",
>+    "local",
>+    "local-floor",
>+    "bounded-floor",
>+    "unbounded"
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRRenderState.cpp b/Source/WebCore/Modules/webxr/XRRenderState.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..3eabffa2d267ec2b0bacbf0a34f36e0951cfe439
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRRenderState.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 "XRRenderState.h"
>+
>+#include "XRRenderStateInit.h"
>+#include "XRWebGLLayer.h"
>+#include <wtf/IsoMallocInlines.h>
>+#include <wtf/MathExtras.h>
>+
>+namespace WebCore {
>+
>+WTF_MAKE_ISO_ALLOCATED_IMPL(XRRenderState);
>+
>+Ref<XRRenderState> XRRenderState::create(const XRSession& 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 XRRenderState(WTFMove(inlineVerticalFieldOfView)));
>+}
>+
>+XRRenderState::XRRenderState(Optional<double>&& inlineVerticalFieldOfView)
>+    : m_inlineVerticalFieldOfView(WTFMove(inlineVerticalFieldOfView))
>+{
>+}
>+
>+XRRenderState::XRRenderState(const XRRenderStateInit&)
>+{
>+}
>+
>+XRRenderState::~XRRenderState() = default;
>+
>+double XRRenderState::depthNear() const
>+{
>+    return m_depth.near;
>+}
>+
>+double XRRenderState::depthFar() const
>+{
>+    return m_depth.far;
>+}
>+
>+Optional<double> XRRenderState::inlineVerticalFieldOfView() const
>+{
>+    return m_inlineVerticalFieldOfView;
>+}
>+
>+RefPtr<XRWebGLLayer> XRRenderState::baseLayer() const
>+{
>+    return m_baseLayer;
>+}
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRRenderState.h b/Source/WebCore/Modules/webxr/XRRenderState.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..9d19214f40f7c19ba4b529e3ed0b1e1fe72a7ec0
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRRenderState.h
>@@ -0,0 +1,63 @@
>+/*
>+ * 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 <wtf/IsoMalloc.h>
>+#include <wtf/Optional.h>
>+#include <wtf/Ref.h>
>+#include <wtf/RefCounted.h>
>+#include <wtf/RefPtr.h>
>+
>+namespace WebCore {
>+
>+class XRWebGLLayer;
>+struct XRRenderStateInit;
>+class XRSession;
>+
>+class XRRenderState : public RefCounted<XRRenderState> {
>+    WTF_MAKE_ISO_ALLOCATED(XRRenderState);
>+public:
>+    static Ref<XRRenderState> create(const XRSession&);
>+    ~XRRenderState();
>+
>+    double depthNear() const;
>+    double depthFar() const;
>+    Optional<double> inlineVerticalFieldOfView() const;
>+    RefPtr<XRWebGLLayer> baseLayer() const;
>+
>+private:
>+    XRRenderState(Optional<double>&&);
>+    XRRenderState(const XRRenderStateInit&);
>+
>+    struct {
>+        double near { 0.1 };
>+        double far { 1000 };
>+    } m_depth;
>+    Optional<double> m_inlineVerticalFieldOfView;
>+    RefPtr<XRWebGLLayer> m_baseLayer;
>+};
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRRenderState.idl b/Source/WebCore/Modules/webxr/XRRenderState.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..4785d5b5e175ce64bc0c5fc8f991617a9339d733
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRRenderState.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=WEBGL,
>+    SecureContext,
>+    Exposed=Window,
>+    ImplementationLacksVTable
>+] interface XRRenderState {
>+    readonly attribute double depthNear;
>+    readonly attribute double depthFar;
>+    readonly attribute double? inlineVerticalFieldOfView;
>+    readonly attribute XRWebGLLayer? baseLayer;
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRRenderStateInit.h b/Source/WebCore/Modules/webxr/XRRenderStateInit.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..8155fd99d5f02bff09e88308e9f4d8dbe96c8bdb
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRRenderStateInit.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
>+
>+#include "XRWebGLLayer.h"
>+#include <wtf/RefPtr.h>
>+
>+namespace WebCore {
>+
>+struct XRRenderStateInit {
>+    double depthNear;
>+    double depthFar;
>+    double inlineVerticalFieldOfView;
>+    RefPtr<XRWebGLLayer> baseLayer;
>+};
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRRenderStateInit.idl b/Source/WebCore/Modules/webxr/XRRenderStateInit.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..3642eb9886131f471f63c2667a46b0dfa16c0283
>--- /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=WEBGL,
>+] dictionary XRRenderStateInit {
>+    double depthNear;
>+    double depthFar;
>+    double inlineVerticalFieldOfView;
>+    XRWebGLLayer? baseLayer;
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRRigidTransform.cpp b/Source/WebCore/Modules/webxr/XRRigidTransform.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..7cc4b7e68d35240f2081e3172171ab7d920f7344
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRRigidTransform.cpp
>@@ -0,0 +1,110 @@
>+/*
>+ * 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 "XRRigidTransform.h"
>+
>+#include "DOMPointReadOnly.h"
>+#include "TransformationMatrix.h"
>+#include <JavaScriptCore/TypedArrayInlines.h>
>+#include <wtf/IsoMallocInlines.h>
>+
>+namespace WebCore {
>+
>+WTF_MAKE_ISO_ALLOCATED_IMPL(XRRigidTransform);
>+
>+Ref<XRRigidTransform> XRRigidTransform::create()
>+{
>+    return adoptRef(*new XRRigidTransform({ }, { }));
>+}
>+
>+ExceptionOr<Ref<XRRigidTransform>> XRRigidTransform::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 XRRigidTransform(positionInit, orientationInit));
>+}
>+
>+XRRigidTransform::XRRigidTransform(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());
>+}
>+
>+XRRigidTransform::~XRRigidTransform() = default;
>+
>+const DOMPointReadOnly& XRRigidTransform::position() const
>+{
>+    return m_position;
>+}
>+
>+const DOMPointReadOnly& XRRigidTransform::orientation() const
>+{
>+    return m_orientation;
>+}
>+
>+Ref<Float32Array>  XRRigidTransform::matrix() const
>+{
>+    auto matrix = Float32Array::create(16);
>+    matrix->zeroFill();
>+    return matrix;
>+}
>+
>+Ref<XRRigidTransform> XRRigidTransform::inverse() const
>+{
>+    // FIXME: implement properly.
>+    return XRRigidTransform::create();
>+}
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRRigidTransform.h b/Source/WebCore/Modules/webxr/XRRigidTransform.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..29d043e81230f54eb13c978e983770a14a158057
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRRigidTransform.h
>@@ -0,0 +1,58 @@
>+/*
>+ * 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 "ExceptionOr.h"
>+#include <JavaScriptCore/Float32Array.h>
>+#include <wtf/IsoMalloc.h>
>+#include <wtf/RefCounted.h>
>+
>+namespace WebCore {
>+
>+struct DOMPointInit;
>+class DOMPointReadOnly;
>+
>+class XRRigidTransform : public RefCounted<XRRigidTransform> {
>+    WTF_MAKE_ISO_ALLOCATED(XRRigidTransform);
>+public:
>+    static Ref<XRRigidTransform> create();
>+    static ExceptionOr<Ref<XRRigidTransform>> create(const DOMPointInit&, const DOMPointInit&);
>+    ~XRRigidTransform();
>+
>+    const DOMPointReadOnly& position() const;
>+    const DOMPointReadOnly& orientation() const;
>+    Ref<Float32Array> matrix() const;
>+    Ref<XRRigidTransform> inverse() const;
>+
>+private:
>+    XRRigidTransform(const DOMPointInit&, const DOMPointInit&);
>+
>+    Ref<DOMPointReadOnly> m_position;
>+    Ref<DOMPointReadOnly> m_orientation;
>+    RefPtr<Float32Array> m_matrix;
>+};
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRRigidTransform.idl b/Source/WebCore/Modules/webxr/XRRigidTransform.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..7df5c8927a249a005617ccca9771bde043fe83e6
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRRigidTransform.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=WEBGL,
>+    SecureContext,
>+    Exposed=Window,
>+    Constructor(optional DOMPointInit position, optional DOMPointInit orientation),
>+    ConstructorMayThrowException,
>+    ImplementationLacksVTable
>+] interface XRRigidTransform {
>+    [SameObject] readonly attribute DOMPointReadOnly position;
>+    [SameObject] readonly attribute DOMPointReadOnly orientation;
>+    readonly attribute Float32Array matrix;
>+    [SameObject] readonly attribute XRRigidTransform inverse;
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRSession.cpp b/Source/WebCore/Modules/webxr/XRSession.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..62762532f7170b25ecd606eebdec12a593574573
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRSession.cpp
>@@ -0,0 +1,87 @@
>+/*
>+ * 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 "XRSession.h"
>+
>+#include <wtf/IsoMallocInlines.h>
>+
>+namespace WebCore {
>+
>+WTF_MAKE_ISO_ALLOCATED_IMPL(XRSession);
>+
>+XRSession::~XRSession() = default;
>+
>+XREnvironmentBlendMode XRSession::environmentBlendMode() const
>+{
>+    return m_environmentBlendMode;
>+}
>+
>+XRVisibilityState XRSession::visibilityState() const
>+{
>+    return m_visibilityState;
>+}
>+
>+const XRRenderState& XRSession::renderState() const
>+{
>+    return *m_renderState;
>+}
>+
>+const XRInputSourceArray& XRSession::inputSources() const
>+{
>+    return *m_inputSources;
>+}
>+
>+void XRSession::updateRenderState(const XRRenderStateInit&)
>+{
>+}
>+
>+void XRSession::requestReferenceSpace(const XRReferenceSpaceType&, RequestReferenceSpacePromise&&)
>+{
>+}
>+
>+int XRSession::requestAnimationFrame(Ref<XRFrameRequestCallback>&&)
>+{
>+    return 0;
>+}
>+
>+void XRSession::cancelAnimationFrame(int)
>+{
>+}
>+
>+void XRSession::end(EndPromise&&)
>+{
>+}
>+
>+const char* XRSession::activeDOMObjectName() const
>+{
>+    return "XRSession";
>+}
>+
>+void XRSession::stop()
>+{
>+}
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRSession.h b/Source/WebCore/Modules/webxr/XRSession.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..fdfc8d4225504ec524e3f8bd00e9be3757fe734e
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRSession.h
>@@ -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.
>+ */
>+
>+#pragma once
>+
>+#include "ActiveDOMObject.h"
>+#include "EventTarget.h"
>+#include "JSDOMPromiseDeferred.h"
>+#include "XREnvironmentBlendMode.h"
>+#include "XRInputSourceArray.h"
>+#include "XRReferenceSpaceType.h"
>+#include "XRRenderState.h"
>+#include "XRSpace.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 XRReferenceSpace;
>+struct XRRenderStateInit;
>+
>+class XRSession final : public RefCounted<XRSession>, public EventTargetWithInlineData, public ActiveDOMObject {
>+    WTF_MAKE_ISO_ALLOCATED(XRSession);
>+public:
>+    using RequestReferenceSpacePromise = DOMPromiseDeferred<IDLInterface<XRReferenceSpace>>;
>+    using EndPromise = DOMPromiseDeferred<void>;
>+
>+    virtual ~XRSession();
>+
>+    using RefCounted<XRSession>::ref;
>+    using RefCounted<XRSession>::deref;
>+
>+    XREnvironmentBlendMode environmentBlendMode() const;
>+    XRVisibilityState visibilityState() const;
>+    const XRRenderState& renderState() const;
>+    const XRInputSourceArray& 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 XRSessionEventTargetInterfaceType; }
>+    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<XRRenderState> m_renderState;
>+    RefPtr<XRInputSourceArray> m_inputSources;
>+    bool m_ended { false };
>+};
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRSession.idl b/Source/WebCore/Modules/webxr/XRSession.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..423a52f5923a4fb8b135c598c073c6309159ce97
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRSession.idl
>@@ -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.
>+ */
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBGL,
>+    ActiveDOMObject,
>+    SecureContext,
>+    Exposed=Window
>+] interface XRSession : EventTarget {
>+    // Attributes
>+    readonly attribute XREnvironmentBlendMode environmentBlendMode;
>+    readonly attribute XRVisibilityState visibilityState;
>+    [SameObject] readonly attribute XRRenderState renderState;
>+    [SameObject] readonly attribute XRInputSourceArray inputSources;
>+
>+    // Methods
>+    void updateRenderState(optional XRRenderStateInit stateInit);
>+    [NewObject] Promise<XRReferenceSpace> 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/XRSessionEvent.cpp b/Source/WebCore/Modules/webxr/XRSessionEvent.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..f159dabb6f3ce653fa392cd76170cdb7ea54117e
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRSessionEvent.cpp
>@@ -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.
>+ */
>+
>+#include "config.h"
>+#include "XRSessionEvent.h"
>+
>+#include "XRSession.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 XRSession& XRSessionEvent::session() const
>+{
>+    return *m_session;
>+}
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRSessionEvent.h b/Source/WebCore/Modules/webxr/XRSessionEvent.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..d7e1f9e6a18e390637f4b7062a67eb71bc0e25da
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRSessionEvent.h
>@@ -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.
>+ */
>+
>+#pragma once
>+
>+#include "Event.h"
>+
>+namespace WebCore {
>+
>+class XRSession;
>+
>+class XRSessionEvent final : public Event {
>+public:
>+    struct Init : EventInit {
>+        RefPtr<XRSession> session;
>+    };
>+
>+    static Ref<XRSessionEvent> create(const AtomString&, const Init&, IsTrusted = IsTrusted::No);
>+    virtual ~XRSessionEvent();
>+
>+    const XRSession& session() const;
>+
>+private:
>+    XRSessionEvent(const AtomString&, const Init&, IsTrusted);
>+
>+    RefPtr<XRSession> m_session;
>+};
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRSessionEvent.idl b/Source/WebCore/Modules/webxr/XRSessionEvent.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..f644366df613ef910c8250f1b4a3393286f87aa3
>--- /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=WEBGL,
>+] dictionary XRSessionEventInit : EventInit {
>+    required XRSession session;
>+};
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBGL,
>+    SecureContext,
>+    Exposed=Window,
>+    Constructor(DOMString type, XRSessionEventInit eventInitDict)
>+] interface XRSessionEvent : Event {
>+    [SameObject] readonly attribute XRSession session;
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRSessionInit.h b/Source/WebCore/Modules/webxr/XRSessionInit.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..f2b47cc26a418279c5f9cfe2fb1e61a1590ec2f4
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRSessionInit.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
>+
>+#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
>diff --git a/Source/WebCore/Modules/webxr/XRSessionInit.idl b/Source/WebCore/Modules/webxr/XRSessionInit.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..15860a8ba4779d4d4bdb0ceefb0fe4623c1b5ef8
>--- /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=WEBGL
>+] 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..621ec658ffbbbd74999b4b97eb87a79b99ecbb9d
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRSessionMode.h
>@@ -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.
>+ */
>+
>+#pragma once
>+
>+#include "PlatformXR.h"
>+
>+namespace WebCore {
>+
>+using XRSessionMode = PlatformXR::SessionMode;
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRSessionMode.idl b/Source/WebCore/Modules/webxr/XRSessionMode.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..e19d9b45e91337a29816ed7948c565184c25b9cc
>--- /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=WEBGL
>+] enum XRSessionMode {
>+    "inline",
>+    "immersive-vr",
>+    "immersive-ar"
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRSpace.cpp b/Source/WebCore/Modules/webxr/XRSpace.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..74a70089a5382b22ed8ff5352c541d8dcb6ca7cd
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRSpace.cpp
>@@ -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.
>+ */
>+
>+#include "config.h"
>+#include "XRSpace.h"
>+
>+#include <wtf/IsoMallocInlines.h>
>+
>+namespace WebCore {
>+
>+WTF_MAKE_ISO_ALLOCATED_IMPL(XRSpace);
>+
>+XRSpace::XRSpace(ScriptExecutionContext& context)
>+    : ContextDestructionObserver(&context)
>+{
>+}
>+
>+XRSpace::~XRSpace() = default;
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRSpace.h b/Source/WebCore/Modules/webxr/XRSpace.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..415913929663778b0b7a44fcee0d421f1fc4724d
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRSpace.h
>@@ -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.
>+ */
>+
>+#pragma once
>+
>+#include "ContextDestructionObserver.h"
>+#include "EventTarget.h"
>+#include <wtf/RefCounted.h>
>+
>+namespace WebCore {
>+
>+class ScriptExecutionContext;
>+
>+class XRSpace : public RefCounted<XRSpace>, public EventTargetWithInlineData, public ContextDestructionObserver {
>+    WTF_MAKE_ISO_ALLOCATED(XRSpace);
>+public:
>+    virtual ~XRSpace();
>+
>+    using RefCounted<XRSpace>::ref;
>+    using RefCounted<XRSpace>::deref;
>+
>+protected:
>+    XRSpace(ScriptExecutionContext&);
>+
>+    // EventTarget
>+    ScriptExecutionContext* scriptExecutionContext() const override { return ContextDestructionObserver::scriptExecutionContext(); }
>+
>+private:
>+    // EventTarget
>+    EventTargetInterface eventTargetInterface() const override { return XRSpaceEventTargetInterfaceType; }
>+    void refEventTarget() override { ref(); }
>+    void derefEventTarget() override { deref(); }
>+};
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRSpace.idl b/Source/WebCore/Modules/webxr/XRSpace.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..249004a98bd834a330595aecca45945fc107c2d0
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRSpace.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=WEBGL,
>+    SecureContext,
>+    Exposed=Window
>+] interface XRSpace : EventTarget {
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRSystem.cpp b/Source/WebCore/Modules/webxr/XRSystem.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..097453e36480ee4d4ce2b37acb1f990129775c10
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRSystem.cpp
>@@ -0,0 +1,88 @@
>+/*
>+ * 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 "XRSystem.h"
>+
>+#include "PlatformXR.h"
>+#include <wtf/IsoMallocInlines.h>
>+
>+namespace WebCore {
>+
>+WTF_MAKE_ISO_ALLOCATED_IMPL(XRSystem);
>+
>+Ref<XRSystem> XRSystem::create(ScriptExecutionContext& scriptExecutionContext)
>+{
>+    return adoptRef(*new XRSystem(scriptExecutionContext));
>+}
>+
>+XRSystem::XRSystem(ScriptExecutionContext& scriptExecutionContext)
>+    : ActiveDOMObject(&scriptExecutionContext)
>+{
>+}
>+
>+XRSystem::~XRSystem() = default;
>+
>+void XRSystem::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 XRSystem::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* XRSystem::activeDOMObjectName() const
>+{
>+    return "XRSystem";
>+}
>+
>+void XRSystem::stop()
>+{
>+}
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRSystem.h b/Source/WebCore/Modules/webxr/XRSystem.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..8cc944ca40799b170fe9272eb233b1c9d12667ad
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRSystem.h
>@@ -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.
>+ */
>+
>+#pragma once
>+
>+#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 XRSession;
>+struct XRSessionInit;
>+
>+class XRSystem final : public RefCounted<XRSystem>, public EventTargetWithInlineData, public ActiveDOMObject {
>+    WTF_MAKE_ISO_ALLOCATED(XRSystem);
>+public:
>+    using IsSessionSupportedPromise = DOMPromiseDeferred<IDLBoolean>;
>+    using RequestSessionPromise = DOMPromiseDeferred<IDLInterface<XRSession>>;
>+
>+    static Ref<XRSystem> create(ScriptExecutionContext&);
>+    virtual ~XRSystem();
>+
>+    using RefCounted<XRSystem>::ref;
>+    using RefCounted<XRSystem>::deref;
>+
>+    void isSessionSupported(XRSessionMode, IsSessionSupportedPromise&&);
>+    void requestSession(XRSessionMode, const XRSessionInit&, RequestSessionPromise&&);
>+
>+protected:
>+    XRSystem(ScriptExecutionContext&);
>+
>+    // EventTarget
>+    EventTargetInterface eventTargetInterface() const override { return XRSystemEventTargetInterfaceType; }
>+    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
>diff --git a/Source/WebCore/Modules/webxr/XRSystem.idl b/Source/WebCore/Modules/webxr/XRSystem.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..a75b6da5a620a88517e9dda0f07ec7bfcafd1954
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRSystem.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=WEBGL,
>+    ActiveDOMObject,
>+    SecureContext,
>+    Exposed=Window
>+] interface XRSystem : EventTarget {
>+    // Methods
>+    Promise<void> isSessionSupported(XRSessionMode mode);
>+    [NewObject] Promise<XRSession> requestSession(XRSessionMode mode, optional XRSessionInit options);
>+
>+    // Events
>+    attribute EventHandler ondevicechange;
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRTargetRayMode.h b/Source/WebCore/Modules/webxr/XRTargetRayMode.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..ff55f15201ca91684dc6b105600bbe206e9f61d5
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRTargetRayMode.h
>@@ -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.
>+ */
>+
>+#pragma once
>+
>+namespace WebCore {
>+
>+enum class XRTargetRayMode {
>+    Gaze,
>+    TrackedPointer,
>+    Screen,
>+};
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRTargetRayMode.idl b/Source/WebCore/Modules/webxr/XRTargetRayMode.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..368218a08c6fa15965b2bf40500fdfe674ba40db
>--- /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=WEBGL
>+] enum XRTargetRayMode {
>+    "gaze",
>+    "tracked-pointer",
>+    "screen"
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRView.cpp b/Source/WebCore/Modules/webxr/XRView.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..ef22876cae269b6cedc5c437dc5a8376346be650
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRView.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 "XRView.h"
>+
>+#include "XRRigidTransform.h"
>+#include <JavaScriptCore/TypedArrayInlines.h>
>+#include <wtf/IsoMallocInlines.h>
>+
>+namespace WebCore {
>+
>+WTF_MAKE_ISO_ALLOCATED_IMPL(XRView);
>+
>+Ref<XRView> XRView::create()
>+{
>+    return adoptRef(*new XRView);
>+}
>+
>+XRView::XRView()
>+    : m_eye(XREye::Left)
>+    , m_projectionMatrix(Float32Array::create(0))
>+    , m_transform(XRRigidTransform::create())
>+{
>+}
>+
>+XRView::~XRView() = default;
>+
>+XREye XRView::eye() const
>+{
>+    return m_eye;
>+}
>+
>+const Float32Array& XRView::projectionMatrix() const
>+{
>+    return m_projectionMatrix;
>+}
>+
>+const XRRigidTransform& XRView::transform() const
>+{
>+    return m_transform;
>+}
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRView.h b/Source/WebCore/Modules/webxr/XRView.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..60bf3593e1f9e5902eceea382ad08d1e46010c00
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRView.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
>+
>+#include "XREye.h"
>+#include <JavaScriptCore/Float32Array.h>
>+#include <wtf/IsoMalloc.h>
>+#include <wtf/Ref.h>
>+#include <wtf/RefCounted.h>
>+
>+namespace WebCore {
>+
>+class XRRigidTransform;
>+
>+class XRView : public RefCounted<XRView> {
>+    WTF_MAKE_ISO_ALLOCATED(XRView);
>+public:
>+    static Ref<XRView> create();
>+    ~XRView();
>+
>+    XREye eye() const;
>+    const Float32Array& projectionMatrix() const;
>+    const XRRigidTransform& transform() const;
>+
>+private:
>+    XRView();
>+
>+    XREye m_eye;
>+    Ref<Float32Array> m_projectionMatrix;
>+    Ref<XRRigidTransform> m_transform;
>+};
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRView.idl b/Source/WebCore/Modules/webxr/XRView.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..c359955c2f20b026e07fd1e82e01ca326e43a3bf
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRView.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=WEBGL,
>+    SecureContext,
>+    Exposed=Window,
>+    ImplementationLacksVTable
>+] interface XRView {
>+    readonly attribute XREye eye;
>+    readonly attribute Float32Array projectionMatrix;
>+    [SameObject] readonly attribute XRRigidTransform transform;
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRViewerPose.cpp b/Source/WebCore/Modules/webxr/XRViewerPose.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..37fbf2a7600bfc70ab62c541f6b308a271d12312
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRViewerPose.cpp
>@@ -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.
>+ */
>+
>+#include "config.h"
>+#include "XRViewerPose.h"
>+
>+namespace WebCore {
>+
>+Ref<XRViewerPose> XRViewerPose::create()
>+{
>+    return adoptRef(*new XRViewerPose);
>+}
>+
>+XRViewerPose::XRViewerPose() = default;
>+XRViewerPose::~XRViewerPose() = default;
>+
>+const Vector<Ref<XRView>>& XRViewerPose::views() const
>+{
>+    return m_views;
>+}
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRViewerPose.h b/Source/WebCore/Modules/webxr/XRViewerPose.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..ff940c2f1523fdd1517aa597f4d9d64e869f8552
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRViewerPose.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 "XRPose.h"
>+#include "XRView.h"
>+#include <wtf/IsoMalloc.h>
>+#include <wtf/Ref.h>
>+#include <wtf/RefCounted.h>
>+#include <wtf/Vector.h>
>+
>+namespace WebCore {
>+
>+class XRViewerPose : public XRPose {
>+public:
>+    static Ref<XRViewerPose> create();
>+    ~XRViewerPose();
>+
>+    const Vector<Ref<XRView>>& views() const;
>+
>+private:
>+    XRViewerPose();
>+
>+    Vector<Ref<XRView>> m_views;
>+};
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRViewerPose.idl b/Source/WebCore/Modules/webxr/XRViewerPose.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..e04bc6d01227eb277e7297395e7e0e3b0ecabe2e
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRViewerPose.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=WEBGL,
>+    SecureContext,
>+    Exposed=Window,
>+    ImplementationLacksVTable
>+] interface XRViewerPose : XRPose {
>+    [SameObject] readonly attribute FrozenArray<XRView> views;
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRViewport.cpp b/Source/WebCore/Modules/webxr/XRViewport.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..59f0d89e737465fb5096d738517c7924bd3cdad6
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRViewport.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 "XRViewport.h"
>+
>+#include <wtf/IsoMallocInlines.h>
>+
>+namespace WebCore {
>+
>+WTF_MAKE_ISO_ALLOCATED_IMPL(XRViewport);
>+
>+Ref<XRViewport> XRViewport::create()
>+{
>+    return adoptRef(*new XRViewport);
>+}
>+
>+XRViewport::XRViewport() = default;
>+
>+int XRViewport::x() const
>+{
>+    return 0;
>+}
>+
>+int XRViewport::y() const
>+{
>+    return 0;
>+}
>+
>+int XRViewport::width() const
>+{
>+    return 0;
>+}
>+
>+int XRViewport::height() const
>+{
>+    return 0;
>+}
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRViewport.h b/Source/WebCore/Modules/webxr/XRViewport.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..0617bda1282c8bddda428d342286f85007e9c3ed
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRViewport.h
>@@ -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.
>+ */
>+
>+#pragma once
>+
>+#include <wtf/IsoMalloc.h>
>+#include <wtf/Ref.h>
>+#include <wtf/RefCounted.h>
>+
>+namespace WebCore {
>+
>+class XRViewport : public RefCounted<XRViewport> {
>+    WTF_MAKE_ISO_ALLOCATED(XRViewport);
>+public:
>+    static Ref<XRViewport> create();
>+
>+    int x() const;
>+    int y() const;
>+    int width() const;
>+    int height() const;
>+
>+private:
>+    XRViewport();
>+};
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRViewport.idl b/Source/WebCore/Modules/webxr/XRViewport.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..543c26ee5fdf12899146eb616199e270517d97d2
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRViewport.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=WEBGL,
>+    SecureContext,
>+    Exposed=Window,
>+    ImplementationLacksVTable
>+] interface XRViewport {
>+    readonly attribute long x;
>+    readonly attribute long y;
>+    readonly attribute long width;
>+    readonly attribute long height;
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRVisibilityState.h b/Source/WebCore/Modules/webxr/XRVisibilityState.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..dc2b60edbc92013c377991ca464387abca70bba1
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRVisibilityState.h
>@@ -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.
>+ */
>+
>+#pragma once
>+
>+namespace WebCore {
>+
>+enum class XRVisibilityState {
>+    Visible,
>+    VisibleBlurred,
>+    Hidden
>+};
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRVisibilityState.idl b/Source/WebCore/Modules/webxr/XRVisibilityState.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..f9177a08de246b875c83226d3ef9b2837c58a9db
>--- /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=WEBGL
>+] enum XRVisibilityState {
>+    "visible",
>+    "visible-blurred",
>+    "hidden"
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRWebGLLayer.cpp b/Source/WebCore/Modules/webxr/XRWebGLLayer.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..9820b6d4fd0eb3aaf4aced66db46ffd321b1de40
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRWebGLLayer.cpp
>@@ -0,0 +1,128 @@
>+/*
>+ * 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 "XRWebGLLayer.h"
>+
>+#include "WebGLFramebuffer.h"
>+#include "WebGLRenderingContext.h"
>+#if ENABLE(WEBGL2)
>+#include "WebGL2RenderingContext.h"
>+#endif
>+#include "XRSession.h"
>+#include "XRViewport.h"
>+#include "XRWebGLLayerInit.h"
>+
>+namespace WebCore {
>+
>+ExceptionOr<Ref<XRWebGLLayer>> XRWebGLLayer::create(const XRSession& session, XRRenderingContext&& 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 XRWebGLLayer(session, WTFMove(context), init));
>+}
>+
>+XRWebGLLayer::XRWebGLLayer(const XRSession&, XRRenderingContext&& 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;
>+        }
>+    );
>+}
>+
>+XRWebGLLayer::~XRWebGLLayer() = default;
>+
>+bool XRWebGLLayer::antialias() const
>+{
>+    return m_antialias;
>+}
>+
>+bool XRWebGLLayer::ignoreDepthValues() const
>+{
>+    return m_ignoreDepthValues;
>+}
>+
>+const WebGLFramebuffer& XRWebGLLayer::framebuffer() const
>+{
>+    return *m_framebuffer.object;
>+}
>+
>+unsigned XRWebGLLayer::framebufferWidth() const
>+{
>+    return m_framebuffer.width;
>+}
>+
>+unsigned XRWebGLLayer::framebufferHeight() const
>+{
>+    return m_framebuffer.height;
>+}
>+
>+RefPtr<XRViewport> XRWebGLLayer::getViewport(const XRView&)
>+{
>+    return { };
>+}
>+
>+double XRWebGLLayer::getNativeFramebufferScaleFactor(const XRSession&)
>+{
>+    return 1.0;
>+}
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRWebGLLayer.h b/Source/WebCore/Modules/webxr/XRWebGLLayer.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..10f3ca89540085ab7747a0749758f317969a3474
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRWebGLLayer.h
>@@ -0,0 +1,86 @@
>+/*
>+ * 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 "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 XRSession;
>+class XRView;
>+class XRViewport;
>+struct XRWebGLLayerInit;
>+
>+class XRWebGLLayer : public RefCounted<XRWebGLLayer> {
>+public:
>+    
>+    using XRRenderingContext = WTF::Variant<
>+        RefPtr<WebGLRenderingContext>, 
>+#if ENABLE(WEBGL2)
>+        RefPtr<WebGL2RenderingContext>,
>+#endif
>+        WTF::Monostate
>+    >;
>+
>+    static ExceptionOr<Ref<XRWebGLLayer>> create(const XRSession&, XRRenderingContext&&, const XRWebGLLayerInit&);
>+    ~XRWebGLLayer();
>+
>+    bool antialias() const;
>+    bool ignoreDepthValues() const;
>+
>+    const WebGLFramebuffer& framebuffer() const;
>+    unsigned framebufferWidth() const;
>+    unsigned framebufferHeight() const;
>+
>+    RefPtr<XRViewport> getViewport(const XRView&);
>+
>+    static double getNativeFramebufferScaleFactor(const XRSession&);
>+
>+private:
>+    XRWebGLLayer(const XRSession&, XRRenderingContext&&, const XRWebGLLayerInit&);
>+
>+    XRRenderingContext m_context;
>+    bool m_antialias { false };
>+    bool m_ignoreDepthValues { false };
>+
>+    struct {
>+        RefPtr<WebGLFramebuffer> object;
>+        unsigned width { 0 };
>+        unsigned height { 0 };
>+    } m_framebuffer;
>+};
>+
>+} // namespace WebCore
>diff --git a/Source/WebCore/Modules/webxr/XRWebGLLayer.idl b/Source/WebCore/Modules/webxr/XRWebGLLayer.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..8b64758bee611326d9e7c077a3c197e1615d03d7
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRWebGLLayer.idl
>@@ -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.
>+ */
>+
>+typedef (WebGLRenderingContext or WebGL2RenderingContext) XRWebGLRenderingContext;
>+
>+[
>+    EnabledAtRuntime=WebXR,
>+    Conditional=WEBGL,
>+    SecureContext,
>+    Exposed=Window,
>+    //Constructor(XRSession session, XRWebGLRenderingContext context, optional XRWebGLLayerInit layerInit),
>+    //ConstructorMayThrowException,
>+    ImplementationLacksVTable
>+] interface XRWebGLLayer {
>+    // 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
>+    XRViewport? getViewport(XRView view);
>+
>+    // Static Methods
>+    static double getNativeFramebufferScaleFactor(XRSession session);
>+};
>diff --git a/Source/WebCore/Modules/webxr/XRWebGLLayerInit.h b/Source/WebCore/Modules/webxr/XRWebGLLayerInit.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..0c718fde245f61237733ff799560ac49835c90f3
>--- /dev/null
>+++ b/Source/WebCore/Modules/webxr/XRWebGLLayerInit.h
>@@ -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.
>+ */
>+
>+#pragma once
>+
>+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
>diff --git a/Source/WebCore/Modules/webxr/XRWebGLLayerInit.idl b/Source/WebCore/Modules/webxr/XRWebGLLayerInit.idl
>new file mode 100644
>index 0000000000000000000000000000000000000000..a245b1e6119d7773cfbd0f0e457b2f4e96c1256b
>--- /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=WEBGL
>+] 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/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 a721fbb1ad8a5aa6bda09b63b3a2a9d997c9112f..71da8e661aea2965b21158b1feb0274c923486c3 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_WEBGL
>+
>+Modules/webxr/NavigatorWebXR.cpp @no-unify
>+Modules/webxr/XRBoundedReferenceSpace.cpp @no-unify
>+Modules/webxr/XRFrame.cpp @no-unify
>+Modules/webxr/XRInputSource.cpp @no-unify
>+Modules/webxr/XRInputSourceArray.cpp @no-unify
>+Modules/webxr/XRInputSourceEvent.cpp @no-unify
>+Modules/webxr/XRInputSourcesChangeEvent.cpp @no-unify
>+Modules/webxr/XRPose.cpp @no-unify
>+Modules/webxr/XRReferenceSpace.cpp @no-unify
>+Modules/webxr/XRReferenceSpaceEvent.cpp @no-unify
>+Modules/webxr/XRRenderState.cpp @no-unify
>+Modules/webxr/XRRigidTransform.cpp @no-unify
>+Modules/webxr/XRSession.cpp @no-unify
>+Modules/webxr/XRSessionEvent.cpp @no-unify
>+Modules/webxr/XRSpace.cpp @no-unify
>+Modules/webxr/XRSystem.cpp @no-unify
>+Modules/webxr/XRView.cpp @no-unify
>+Modules/webxr/XRViewerPose.cpp @no-unify
>+Modules/webxr/XRViewport.cpp @no-unify
>+Modules/webxr/XRWebGLLayer.cpp @no-unify
>+
>+#endif
>+
> accessibility/AXObjectCache.cpp
> accessibility/AccessibilityARIAGrid.cpp
> accessibility/AccessibilityARIAGridCell.cpp
>@@ -2071,6 +2096,9 @@ 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
>@@ -3518,6 +3546,41 @@ JSXPathNSResolver.cpp
> JSXPathResult.cpp
> JSXSLTProcessor.cpp
> 
>+#if ENABLE_WEBGL
>+
>+JSXRBoundedReferenceSpace.cpp
>+JSXREnvironmentBlendMode.cpp
>+JSXREye.cpp
>+JSXRFrame.cpp
>+JSXRFrameRequestCallback.cpp
>+JSXRHandedness.cpp
>+JSXRInputSource.cpp
>+JSXRInputSourceArray.cpp
>+JSXRInputSourceEvent.cpp
>+JSXRInputSourcesChangeEvent.cpp
>+JSXRPose.cpp
>+JSXRReferenceSpace.cpp
>+JSXRReferenceSpaceEvent.cpp
>+JSXRReferenceSpaceType.cpp
>+JSXRRenderState.cpp
>+JSXRRenderStateInit.cpp
>+JSXRRigidTransform.cpp
>+JSXRSession.cpp
>+JSXRSessionEvent.cpp
>+JSXRSessionInit.cpp
>+JSXRSessionMode.cpp
>+JSXRSpace.cpp
>+JSXRSystem.cpp
>+JSXRTargetRayMode.cpp
>+JSXRView.cpp
>+JSXRViewerPose.cpp
>+JSXRViewport.cpp
>+JSXRVisibilityState.cpp
>+JSXRWebGLLayer.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 df023ebd4eddbf693405723697ade9bf53968589..33bfe17096cc3e129602001760903d6f42db673a 100644
>--- a/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>+++ b/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>@@ -4800,6 +4800,60 @@
> 		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 /* XRViewerPose.h in Headers */ = {isa = PBXBuildFile; fileRef = E1EE8AC72412B16F00E794D6 /* XRViewerPose.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 /* XRRigidTransform.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E1EE8ACD2412B17000E794D6 /* XRRigidTransform.cpp */; };
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>+		E1EE8B082412B17000E794D6 /* XRWebGLLayerInit.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = XRWebGLLayerInit.h; sourceTree = "<group>"; };
>+		E1EE8B092412B17000E794D6 /* XRInputSourceEvent.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = XRInputSourceEvent.h; sourceTree = "<group>"; };
>+		E1EE8B0A2412B17000E794D6 /* XRViewport.idl */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = XRViewport.idl; sourceTree = "<group>"; };
>+		E1EE8B0B2412B17000E794D6 /* XRViewerPose.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = XRViewerPose.cpp; sourceTree = "<group>"; };
>+		E1EE8B0C2412B17000E794D6 /* XRFrame.idl */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = XRFrame.idl; sourceTree = "<group>"; };
>+		E1EE8B0D2412B17000E794D6 /* XRInputSource.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = XRInputSource.cpp; sourceTree = "<group>"; };
>+		E1EE8B0E2412B17000E794D6 /* NavigatorWebXR.idl */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = NavigatorWebXR.idl; sourceTree = "<group>"; };
>+		E1EE8B0F2412B17000E794D6 /* XRSession.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = XRSession.cpp; sourceTree = "<group>"; };
>+		E1EE8B102412B17000E794D6 /* XRWebGLLayerInit.idl */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = XRWebGLLayerInit.idl; sourceTree = "<group>"; };
>+		E1EE8B112412B17000E794D6 /* XRSession.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = XRSession.h; sourceTree = "<group>"; };
>+		E1EE8B122412B17000E794D6 /* XRView.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = XRView.cpp; sourceTree = "<group>"; };
>+		E1EE8B132412B17000E794D6 /* XRSessionInit.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = XRSessionInit.h; sourceTree = "<group>"; };
>+		E1EE8B142412B17000E794D6 /* XRReferenceSpace.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = XRReferenceSpace.h; sourceTree = "<group>"; };
>+		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 /* XRInputSource.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = XRInputSource.h; sourceTree = "<group>"; };
>+		E1EE8B182412B17000E794D6 /* XRInputSourceArray.idl */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = XRInputSourceArray.idl; sourceTree = "<group>"; };
>+		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>"; };
>@@ -22338,6 +22477,7 @@
> 				996E59DA1DF00D45006612B9 /* webdriver */,
> 				D00F593E216ECC43000D71DB /* webgpu */,
> 				97AABCF714FA09B5007457AE /* websockets */,
>+				E1EE8AC62412B16F00E794D6 /* webxr */,
> 			);
> 			path = Modules;
> 			sourceTree = "<group>";
>@@ -25885,6 +26025,7 @@
> 				656B84D70AEA1CE900A095B4 /* network */,
> 				1A2E6E560CC551E0004A2062 /* sql */,
> 				B2C3D9EC0D006C1D00EF6F26 /* text */,
>+				E1EE8B6B2412B2A700E794D6 /* xr */,
> 				DFDB912CF8E88A6DA1AD264F /* AbortableTaskQueue.h */,
> 				49AE2D94134EE5F90072920A /* CalculationValue.cpp */,
> 				49AE2D95134EE5F90072920A /* CalculationValue.h */,
>@@ -26970,6 +27111,113 @@
> 			name = Threads;
> 			sourceTree = "<group>";
> 		};
>+		E1EE8AC62412B16F00E794D6 /* webxr */ = {
>+			isa = PBXGroup;
>+			children = (
>+				E1EE8AF12412B17000E794D6 /* NavigatorWebXR.cpp */,
>+				E1EE8ACA2412B17000E794D6 /* NavigatorWebXR.h */,
>+				E1EE8B0E2412B17000E794D6 /* NavigatorWebXR.idl */,
>+				E1EE8AD32412B17000E794D6 /* XRBoundedReferenceSpace.cpp */,
>+				E1EE8AD12412B17000E794D6 /* XRBoundedReferenceSpace.h */,
>+				E1EE8AF72412B17000E794D6 /* XRBoundedReferenceSpace.idl */,
>+				E1EE8B052412B17000E794D6 /* XREnvironmentBlendMode.h */,
>+				E1EE8ADA2412B17000E794D6 /* XREnvironmentBlendMode.idl */,
>+				E1EE8AF52412B17000E794D6 /* XREye.h */,
>+				E1EE8B032412B17000E794D6 /* XREye.idl */,
>+				E1EE8AF02412B17000E794D6 /* XRFrame.cpp */,
>+				E1EE8AE32412B17000E794D6 /* XRFrame.h */,
>+				E1EE8B0C2412B17000E794D6 /* XRFrame.idl */,
>+				E1EE8AE92412B17000E794D6 /* XRFrameRequestCallback.h */,
>+				E1EE8AFB2412B17000E794D6 /* XRFrameRequestCallback.idl */,
>+				E1EE8AEE2412B17000E794D6 /* XRHandedness.h */,
>+				E1EE8B072412B17000E794D6 /* XRHandedness.idl */,
>+				E1EE8B0D2412B17000E794D6 /* XRInputSource.cpp */,
>+				E1EE8B172412B17000E794D6 /* XRInputSource.h */,
>+				E1EE8AEF2412B17000E794D6 /* XRInputSource.idl */,
>+				E1EE8AE62412B17000E794D6 /* XRInputSourceArray.cpp */,
>+				E1EE8ADD2412B17000E794D6 /* XRInputSourceArray.h */,
>+				E1EE8B182412B17000E794D6 /* XRInputSourceArray.idl */,
>+				E1EE8ACC2412B17000E794D6 /* XRInputSourceEvent.cpp */,
>+				E1EE8B092412B17000E794D6 /* XRInputSourceEvent.h */,
>+				E1EE8B002412B17000E794D6 /* XRInputSourceEvent.idl */,
>+				E1EE8B152412B17000E794D6 /* XRInputSourcesChangeEvent.cpp */,
>+				E1EE8AF92412B17000E794D6 /* XRInputSourcesChangeEvent.h */,
>+				E1EE8AE42412B17000E794D6 /* XRInputSourcesChangeEvent.idl */,
>+				E1EE8AE52412B17000E794D6 /* XRPose.cpp */,
>+				E1EE8AE12412B17000E794D6 /* XRPose.h */,
>+				E1EE8B162412B17000E794D6 /* XRPose.idl */,
>+				E1EE8AD22412B17000E794D6 /* XRReferenceSpace.cpp */,
>+				E1EE8B142412B17000E794D6 /* XRReferenceSpace.h */,
>+				E1EE8AF62412B17000E794D6 /* XRReferenceSpace.idl */,
>+				E1EE8AF32412B17000E794D6 /* XRReferenceSpaceEvent.cpp */,
>+				E1EE8ADB2412B17000E794D6 /* XRReferenceSpaceEvent.h */,
>+				E1EE8AD02412B17000E794D6 /* XRReferenceSpaceEvent.idl */,
>+				E1EE8AC92412B17000E794D6 /* XRReferenceSpaceType.h */,
>+				E1EE8AFA2412B17000E794D6 /* XRReferenceSpaceType.idl */,
>+				E1EE8ACE2412B17000E794D6 /* XRRenderState.cpp */,
>+				E1EE8AD52412B17000E794D6 /* XRRenderState.h */,
>+				E1EE8AF22412B17000E794D6 /* XRRenderState.idl */,
>+				E1EE8ACB2412B17000E794D6 /* XRRenderStateInit.h */,
>+				E1EE8AEC2412B17000E794D6 /* XRRenderStateInit.idl */,
>+				E1EE8ACD2412B17000E794D6 /* XRRigidTransform.cpp */,
>+				E1EE8B062412B17000E794D6 /* XRRigidTransform.h */,
>+				E1EE8B012412B17000E794D6 /* XRRigidTransform.idl */,
>+				E1EE8B0F2412B17000E794D6 /* XRSession.cpp */,
>+				E1EE8B112412B17000E794D6 /* XRSession.h */,
>+				E1EE8ADE2412B17000E794D6 /* XRSession.idl */,
>+				E1EE8ADC2412B17000E794D6 /* XRSessionEvent.cpp */,
>+				E1EE8AE72412B17000E794D6 /* XRSessionEvent.h */,
>+				E1EE8AFD2412B17000E794D6 /* XRSessionEvent.idl */,
>+				E1EE8B132412B17000E794D6 /* XRSessionInit.h */,
>+				E1EE8AD72412B17000E794D6 /* XRSessionInit.idl */,
>+				E1EE8AFE2412B17000E794D6 /* XRSessionMode.h */,
>+				E1EE8AC82412B16F00E794D6 /* XRSessionMode.idl */,
>+				E1EE8AF82412B17000E794D6 /* XRSpace.cpp */,
>+				E1EE8ACF2412B17000E794D6 /* XRSpace.h */,
>+				E1EE8AD42412B17000E794D6 /* XRSpace.idl */,
>+				E1EE8AE82412B17000E794D6 /* XRSystem.cpp */,
>+				E1EE8AE22412B17000E794D6 /* XRSystem.h */,
>+				E1EE8B022412B17000E794D6 /* XRSystem.idl */,
>+				E1EE8AEA2412B17000E794D6 /* XRTargetRayMode.h */,
>+				E1EE8AFF2412B17000E794D6 /* XRTargetRayMode.idl */,
>+				E1EE8B122412B17000E794D6 /* XRView.cpp */,
>+				E1EE8AE02412B17000E794D6 /* XRView.h */,
>+				E1EE8ADF2412B17000E794D6 /* XRView.idl */,
>+				E1EE8B0B2412B17000E794D6 /* XRViewerPose.cpp */,
>+				E1EE8AC72412B16F00E794D6 /* XRViewerPose.h */,
>+				E1EE8AED2412B17000E794D6 /* XRViewerPose.idl */,
>+				E1EE8AEB2412B17000E794D6 /* XRViewport.cpp */,
>+				E1EE8AF42412B17000E794D6 /* XRViewport.h */,
>+				E1EE8B0A2412B17000E794D6 /* XRViewport.idl */,
>+				E1EE8AD62412B17000E794D6 /* XRVisibilityState.h */,
>+				E1EE8AD92412B17000E794D6 /* XRVisibilityState.idl */,
>+				E1EE8AD82412B17000E794D6 /* XRWebGLLayer.cpp */,
>+				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 = (
>@@ -31633,6 +31881,7 @@
> 				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 */,
>@@ -31845,6 +32094,7 @@
> 				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 */,
>@@ -33181,6 +33431,36 @@
> 				1AB7FC840A8B92EC00D9D37B /* XPathUtil.h in Headers */,
> 				1AB7FC860A8B92EC00D9D37B /* XPathValue.h in Headers */,
> 				1AB7FC880A8B92EC00D9D37B /* XPathVariableReference.h in Headers */,
>+				E1EE8B7E2413191F00E794D6 /* XRBoundedReferenceSpace.h in Headers */,
>+				E1EE8B9C2413195000E794D6 /* XREnvironmentBlendMode.h in Headers */,
>+				E1EE8B972413195000E794D6 /* XREye.h in Headers */,
>+				E1EE8B8A2413191F00E794D6 /* XRFrame.h in Headers */,
>+				E1EE8B8F2413195000E794D6 /* XRFrameRequestCallback.h in Headers */,
>+				E1EE8B922413195000E794D6 /* XRHandedness.h in Headers */,
>+				E1EE8BA82413196300E794D6 /* XRInputSource.h in Headers */,
>+				E1EE8B862413191F00E794D6 /* XRInputSourceArray.h in Headers */,
>+				E1EE8B9F2413195000E794D6 /* XRInputSourceEvent.h in Headers */,
>+				E1EE8B992413195000E794D6 /* XRInputSourcesChangeEvent.h in Headers */,
>+				E1EE8B882413191F00E794D6 /* XRPose.h in Headers */,
>+				E1EE8BA62413196300E794D6 /* XRReferenceSpace.h in Headers */,
>+				E1EE8B842413191F00E794D6 /* XRReferenceSpaceEvent.h in Headers */,
>+				E1EE8B772413191F00E794D6 /* XRReferenceSpaceType.h in Headers */,
>+				E1EE8B812413191F00E794D6 /* XRRenderState.h in Headers */,
>+				E1EE8B792413191F00E794D6 /* XRRenderStateInit.h in Headers */,
>+				E1EE8B9D2413195000E794D6 /* XRRigidTransform.h in Headers */,
>+				E1EE8BA32413196300E794D6 /* XRSession.h in Headers */,
>+				E1EE8B8D2413195000E794D6 /* XRSessionEvent.h in Headers */,
>+				E1EE8BA52413196300E794D6 /* XRSessionInit.h in Headers */,
>+				E1EE8B9A2413195000E794D6 /* XRSessionMode.h in Headers */,
>+				E1EE8B7D2413191F00E794D6 /* XRSpace.h in Headers */,
>+				E1EE8B892413191F00E794D6 /* XRSystem.h in Headers */,
>+				E1EE8B902413195000E794D6 /* XRTargetRayMode.h in Headers */,
>+				E1EE8B872413191F00E794D6 /* XRView.h in Headers */,
>+				E1EE8B762413191F00E794D6 /* XRViewerPose.h in Headers */,
>+				E1EE8B962413195000E794D6 /* XRViewport.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 */,
>@@ -33713,6 +33993,7 @@
> 				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 */,
>@@ -33720,6 +34001,7 @@
> 				E16982601134636A00894115 /* ObjCRuntimeObject.mm in Sources */,
> 				CEA284662141E84900E407E8 /* PlatformEventFactoryIOS.mm in Sources */,
> 				AA12DF491743DF83004DAFDF /* PlatformSpeechSynthesizerIOS.mm in Sources */,
>+				E1EE8B712412B2A800E794D6 /* PlatformXR.cpp in Sources */,
> 				CDA29A301CBF74D400901CCF /* PlaybackSessionInterfaceAVKit.mm in Sources */,
> 				CDA29A161CBDA56C00901CCF /* PlaybackSessionInterfaceMac.mm in Sources */,
> 				419242492127B93E00634FCF /* RealtimeOutgoingVideoSourceCocoa.mm in Sources */,
>@@ -34382,6 +34664,25 @@
> 				A833C7CC0A2CF07400D57664 /* XLinkNames.cpp in Sources */,
> 				A833C80C0A2CF25600D57664 /* XMLNames.cpp in Sources */,
> 				E15A36D91104572700B7B639 /* XMLNSNames.cpp in Sources */,
>+				E1EE8B802413191F00E794D6 /* XRBoundedReferenceSpace.cpp in Sources */,
>+				E1EE8B932413195000E794D6 /* XRFrame.cpp in Sources */,
>+				E1EE8BA12413196300E794D6 /* XRInputSource.cpp in Sources */,
>+				E1EE8B8C2413191F00E794D6 /* XRInputSourceArray.cpp in Sources */,
>+				E1EE8B7A2413191F00E794D6 /* XRInputSourceEvent.cpp in Sources */,
>+				E1EE8BA72413196300E794D6 /* XRInputSourcesChangeEvent.cpp in Sources */,
>+				E1EE8B8B2413191F00E794D6 /* XRPose.cpp in Sources */,
>+				E1EE8B7F2413191F00E794D6 /* XRReferenceSpace.cpp in Sources */,
>+				E1EE8B952413195000E794D6 /* XRReferenceSpaceEvent.cpp in Sources */,
>+				E1EE8B7C2413191F00E794D6 /* XRRenderState.cpp in Sources */,
>+				E1EE8B7B2413191F00E794D6 /* XRRigidTransform.cpp in Sources */,
>+				E1EE8BA22413196300E794D6 /* XRSession.cpp in Sources */,
>+				E1EE8B852413191F00E794D6 /* XRSessionEvent.cpp in Sources */,
>+				E1EE8B982413195000E794D6 /* XRSpace.cpp in Sources */,
>+				E1EE8B8E2413195000E794D6 /* XRSystem.cpp in Sources */,
>+				E1EE8BA42413196300E794D6 /* XRView.cpp in Sources */,
>+				E1EE8BA02413195000E794D6 /* XRViewerPose.cpp in Sources */,
>+				E1EE8B912413195000E794D6 /* XRViewport.cpp in Sources */,
>+				E1EE8B832413191F00E794D6 /* XRWebGLLayer.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..f8c1d35afcda39d34a6eea7357cc8c348bcadf89 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) \
>diff --git a/Source/WebCore/dom/EventNames.in b/Source/WebCore/dom/EventNames.in
>index 157f331c1ba73c10d5d33496ad25fe653a7c51a2..c793e3f662c6c3ed8ec552ea383ac96fc9fa0983 100644
>--- a/Source/WebCore/dom/EventNames.in
>+++ b/Source/WebCore/dom/EventNames.in
>@@ -85,3 +85,7 @@ MediaKeyMessageEvent conditional=ENCRYPTED_MEDIA
> PointerEvent conditional=POINTER_EVENTS
> GPUUncapturedErrorEvent conditional=WEBGPU
> EnterPictureInPictureEvent conditional=PICTURE_IN_PICTURE_API
>+XRInputSourceEvent conditional=WEBGL
>+XRInputSourcesChangeEvent conditional=WEBGL
>+XRReferenceSpaceEvent conditional=WEBGL
>+XRSessionEvent conditional=WEBGL
>diff --git a/Source/WebCore/dom/EventTargetFactory.in b/Source/WebCore/dom/EventTargetFactory.in
>index 81e7cc9f0b7650562aabfefe05a5a3ad1bbbb8ff..eb0ae006683a87db7f3b84c55d140a4797b83b55 100644
>--- a/Source/WebCore/dom/EventTargetFactory.in
>+++ b/Source/WebCore/dom/EventTargetFactory.in
>@@ -58,4 +58,7 @@ Worker
> WorkletGlobalScope conditional=CSS_PAINTING_API
> XMLHttpRequest
> XMLHttpRequestUpload
>+XRSession conditional=WEBGL
>+XRSpace conditional=WEBGL
>+XRSystem conditional=WEBGL
> 
>diff --git a/Source/WebCore/page/RuntimeEnabledFeatures.h b/Source/WebCore/page/RuntimeEnabledFeatures.h
>index aa29b8355fb58e13111404516c406701378a1b20..88b2dcd7a6ab6d6494646f33be71278556077c1f 100644
>--- a/Source/WebCore/page/RuntimeEnabledFeatures.h
>+++ b/Source/WebCore/page/RuntimeEnabledFeatures.h
>@@ -138,6 +138,9 @@ public:
>     void setInspectorAdditionsEnabled(bool isEnabled) { m_inspectorAdditionsEnabled = isEnabled; }
>     bool inspectorAdditionsEnabled() const { return m_inspectorAdditionsEnabled; }
> 
>+    void setWebXREnabled(bool isEnabled) { m_webXREnabled = isEnabled; }
>+    bool webXREnabled() const { return m_webXREnabled; }
>+
>     void setAccessibilityObjectModelEnabled(bool isEnabled) { m_accessibilityObjectModelEnabled = isEnabled; }
>     bool accessibilityObjectModelEnabled() const { return m_accessibilityObjectModelEnabled; }
> 
>@@ -441,6 +444,7 @@ private:
>     bool m_isWebSocketEnabled { true };
>     bool m_fetchAPIKeepAliveEnabled { false };
>     bool m_inspectorAdditionsEnabled { false };
>+    bool m_webXREnabled { false };
>     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..35029302b609092e8d7d63293e20bc11b327bc54
>--- /dev/null
>+++ b/Source/WebCore/platform/xr/PlatformXR.h
>@@ -0,0 +1,48 @@
>+/*
>+ * 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,
>+};
>+
>+class Device : public CanMakeWeakPtr<Device> {
>+public:
>+};
>+
>+class Instance {
>+public:
>+    static Instance& singleton();
>+
>+private:
>+    Instance();
>+    ~Instance();
>+
>+    struct Impl;
>+    std::unique_ptr<Impl> m_impl;
>+};
>+
>+} // 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..de8c22b69fbfa06d952f69351a21d592a1d834fc
>--- /dev/null
>+++ b/Source/WebCore/platform/xr/openxr/PlatformXR.cpp
>@@ -0,0 +1,162 @@
>+/*
>+ * 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 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
>diff --git a/Source/WebKit/Shared/WebPreferences.yaml b/Source/WebKit/Shared/WebPreferences.yaml
>index 50104a9c9bbcaa982fd2f3d71aa23f5a3f6ee98a..fb494b80dbef1a41667a4e7fe74bbef848cab231 100644
>--- a/Source/WebKit/Shared/WebPreferences.yaml
>+++ b/Source/WebKit/Shared/WebPreferences.yaml
>@@ -1975,6 +1975,15 @@ WebShareFileAPIEnabled:
>     webcoreBinding: RuntimeEnabledFeatures
>     category: experimental
> 
>+WebXREnabled:
>+  type: bool
>+  defaultValue: false
>+  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(WEBGL) && PLATFORM(WPE)
>+
> # Deprecated
> 
> ICECandidateFilteringEnabled:
>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 1abe95320d5a6378cf2a7d09aa9ff8d4a7a04c4c..967568bedb9d2f764f747afd3386460dd31e56fa 100644
>--- a/Source/cmake/OptionsWPE.cmake
>+++ b/Source/cmake/OptionsWPE.cmake
>@@ -172,6 +172,9 @@ if (ENABLE_WPE_QT_API OR USE_WPE_VIDEO_PLANE_DISPLAY_DMABUF)
>     find_package(WPEBackend-fdo 1.5.0 REQUIRED)
> endif ()
> 
>+find_package(OpenXR)
>+SET_AND_EXPOSE_TO_BUILD(USE_OPENXR ${OPENXR_FOUND})
>+
> add_definitions(-DBUILDING_WPE__=1)
> add_definitions(-DGETTEXT_PACKAGE="WPE")
> add_definitions(-DJSC_GLIB_API_ENABLED)
>diff --git a/ChangeLog b/ChangeLog
>index 8f85012360492053fd033adc5dd6d8dd1b17a9dd..0ba2ec41612fd8f6fea575a4e6985053f6cdd44f 100644
>--- a/ChangeLog
>+++ b/ChangeLog
>@@ -1,3 +1,18 @@
>+2020-03-06  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 NOBODY (OOPS!).
>+
>+        Added OpenXR detection and USE_OPENXR define to be used in the sources.
>+        It also adds a dependency between USE_OPENXR and ENABLE_WEBGL.
>+
>+        Largely based on previous work by Å½an DoberÅ¡ek.
>+
>+        * Source/cmake/FindOpenXR.cmake: Added.
>+        * Source/cmake/OptionsWPE.cmake:
>+
> 2020-03-03  Fujii Hironori  <fujii.hironori@gmail.com>
> 
>         [Curl] Add TLS debugging feature to log encryption keys

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