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/*
* Copyright (C) 2020 Igalia S.L. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "WebXRReferenceSpace.h"
#if ENABLE(WEBXR)
#include "Document.h"
#include "WebXRFrame.h"
#include "WebXRRigidTransform.h"
#include "WebXRSession.h"
#include <wtf/IsoMallocInlines.h>
namespace WebCore {
static constexpr double DefaultUserHeightInMeters = 1.65;
WTF_MAKE_ISO_ALLOCATED_IMPL(WebXRReferenceSpace);
Ref<WebXRReferenceSpace> WebXRReferenceSpace::create(Document& document, Ref<WebXRSession>&& session, XRReferenceSpaceType type)
{
// https://immersive-web.github.io/webxr/#xrspace-native-origin
// The transform from the effective space to the native origin's space is
// defined by an origin offset, which is an XRRigidTransform initially set
// to an identity transform.
return adoptRef(*new WebXRReferenceSpace(document, WTFMove(session), WebXRRigidTransform::create(), type));
}
Ref<WebXRReferenceSpace> WebXRReferenceSpace::create(Document& document, Ref<WebXRSession>&& session, Ref<WebXRRigidTransform>&& offset, XRReferenceSpaceType type)
{
return adoptRef(*new WebXRReferenceSpace(document, WTFMove(session), WTFMove(offset), type));
}
WebXRReferenceSpace::WebXRReferenceSpace(Document& document, Ref<WebXRSession>&& session, Ref<WebXRRigidTransform>&& offset, XRReferenceSpaceType type)
: WebXRSpace(document, WTFMove(offset))
, m_session(WTFMove(session))
, m_type(type)
{
}
WebXRReferenceSpace::~WebXRReferenceSpace() = default;
TransformationMatrix WebXRReferenceSpace::nativeOrigin() const
{
TransformationMatrix identity;
// We assume that poses got from the devices are in local space.
// This will require more complex logic if we add ports with different default coordinates.
switch (m_type) {
case XRReferenceSpaceType::Viewer: {
// Return the current pose. Content rendered in viewer pose will stay in fixed point on HMDs.
auto& data = m_session->frameData();
return WebXRFrame::matrixFromPose(data.origin);
}
case XRReferenceSpaceType::Local:
// Data from the device is already in local, use the identity matrix.
return identity;
case XRReferenceSpaceType::Unbounded:
// Local and unbounded use the same device space, use the identity matrix.
return identity;
case XRReferenceSpaceType::LocalFloor: {
// Use the floor transform provided by the device or fallback to a default height.
return floorOriginTransform();
}
case XRReferenceSpaceType::BoundedFloor:
default:
// BoundedFloor is handled by WebXRBoundedReferenceSpace subclass
RELEASE_ASSERT_NOT_REACHED();
}
return identity;
}
ExceptionOr<Ref<WebXRReferenceSpace>> WebXRReferenceSpace::getOffsetReferenceSpace(const WebXRRigidTransform& offsetTransform)
{
auto* document = downcast<Document>(scriptExecutionContext());
if (!document)
return Exception { InvalidStateError };
// https://immersive-web.github.io/webxr/#dom-xrreferencespace-getoffsetreferencespace
// Set offsetSpace’s origin offset to the result of multiplying base’s origin offset by originOffset in the relevant realm of base.
auto offset = WebXRRigidTransform::create(originOffset().rawTransform() * offsetTransform.rawTransform());
return create(*document, m_session.copyRef(), WTFMove(offset), m_type);
}
TransformationMatrix WebXRReferenceSpace::floorOriginTransform() const
{
auto& data = m_session->frameData();
if (!data.floorTransform) {
TransformationMatrix defautTransform;
defautTransform.translate3d(0.0, -DefaultUserHeightInMeters, 0.0);
return defautTransform;
}
// https://immersive-web.github.io/webxr/#dom-xrreferencespacetype-local-floor
// Get floor estimation from the device
// FIXME: Round to nearest 1cm to prevent fingerprinting
return WebXRFrame::matrixFromPose(*data.floorTransform);
}
} // namespace WebCore
#endif // ENABLE(WEBXR)
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