/*

* Copyright (C) 2020 Igalia S.L. All rights reserved.

*

* Redistribution and use in source and binary forms, with or without

* modification, are permitted provided that the following conditions

* are met:

* 1. Redistributions of source code must retain the above copyright

* notice, this list of conditions and the following disclaimer.

* 2. Redistributions in binary form must reproduce the above copyright

* notice, this list of conditions and the following disclaimer in the

* documentation and/or other materials provided with the distribution.

*

* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''

* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS

* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF

* THE POSSIBILITY OF SUCH DAMAGE.

*/

#include "config.h"

#include "WebXRView.h"

#if ENABLE(WEBXR)

#include "WebXRFrame.h"

#include "WebXRRigidTransform.h"

#include <JavaScriptCore/TypedArrayInlines.h>

#include <wtf/IsoMallocInlines.h>

namespace WebCore {

// Arbitrary value for minimum viewport scaling.

// Below this threshold the resulting viewport would be too pixelated.

static constexpr double kMinViewportScale = 0.1;

WTF_MAKE_ISO_ALLOCATED_IMPL(WebXRView);

Ref<WebXRView> WebXRView::create(Ref<WebXRFrame>&& frame, XREye eye, Ref<WebXRRigidTransform>&& transform, Ref<Float32Array>&& projection)

{

return adoptRef(*new WebXRView(WTFMove(frame), eye, WTFMove(transform), WTFMove(projection)));

}

WebXRView::WebXRView(Ref<WebXRFrame>&& frame, XREye eye, Ref<WebXRRigidTransform>&& transform, Ref<Float32Array>&& projection)

: m_frame(WTFMove(frame))

, m_eye(eye)

, m_transform(WTFMove(transform))

, m_projection(WTFMove(projection))

{

}

WebXRView::~WebXRView() = default;

// https://immersive-web.github.io/webxr/#dom-xrview-recommendedviewportscale

std::optional<double> WebXRView::recommendedViewportScale() const

{

// Return null if the system does not implement a heuristic or method for determining a recommended scale.

return std::nullopt;

}

// https://immersive-web.github.io/webxr/#dom-xrview-requestviewportscale

void WebXRView::requestViewportScale(std::optional<double> value)

{

if (!value || *value <= 0.0)

return;

m_requestedViewportScale = std::clamp(*value, kMinViewportScale, 1.0);

}

} // namespace WebCore

#endif // ENABLE(WEBXR)