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/*
* Copyright (C) 2025 Apple Inc. 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 "ModelProcessModelPlayerTransformState.h"
#if ENABLE(MODEL_PROCESS)
#include <CoreRE/CoreRE.h>
#include <WebCore/FloatPoint3D.h>
#include <WebCore/TransformationMatrix.h>
namespace WebKit {
std::unique_ptr<ModelProcessModelPlayerTransformState> ModelProcessModelPlayerTransformState::create(std::optional<WebCore::TransformationMatrix> entityTransform, std::optional<WebCore::FloatPoint3D> boundingBoxCenter, std::optional<WebCore::FloatPoint3D> boundingBoxExtents, bool hasPortal, WebCore::StageModeOperation stageModeOperation)
{
return makeUnique<ModelProcessModelPlayerTransformState>(entityTransform, boundingBoxCenter, boundingBoxExtents, hasPortal, stageModeOperation);
}
ModelProcessModelPlayerTransformState::ModelProcessModelPlayerTransformState(std::optional<WebCore::TransformationMatrix> entityTransform, std::optional<WebCore::FloatPoint3D> boundingBoxCenter, std::optional<WebCore::FloatPoint3D> boundingBoxExtents, bool hasPortal, WebCore::StageModeOperation stageModeOperation)
: m_entityTransform(entityTransform)
, m_boundingBoxCenter(boundingBoxCenter)
, m_boundingBoxExtents(boundingBoxExtents)
, m_hasPortal(hasPortal)
, m_stageModeOperation(stageModeOperation)
{
}
std::unique_ptr<WebCore::ModelPlayerTransformState> ModelProcessModelPlayerTransformState::clone() const
{
return makeUnique<ModelProcessModelPlayerTransformState>(m_entityTransform, m_boundingBoxCenter, m_boundingBoxExtents, m_hasPortal, m_stageModeOperation);
}
static bool areSameSignAndAlmostEqual(float a, float b, float tolerance)
{
if (a * b < 0)
return false;
float absA = std::abs(a);
float absB = std::abs(b);
return std::abs(absA - absB) < tolerance * std::min(absA, absB);
}
bool ModelProcessModelPlayerTransformState::transformSupported(const WebCore::TransformationMatrix& transform)
{
constexpr float tolerance = 1e-5f;
RESRT srt = REMakeSRTFromMatrix(transform);
// Scale must be uniform across all 3 axis
if (!areSameSignAndAlmostEqual(simd_reduce_max(srt.scale), simd_reduce_min(srt.scale), tolerance)) {
RELEASE_LOG_ERROR(ModelElement, "Rejecting non-uniform scaling %.05f %.05f %.05f", srt.scale[0], srt.scale[1], srt.scale[2]);
return false;
}
// Matrix must be a SRT (scale/rotation/translation) matrix - no shear.
// RESRT itself is already clean of shear, so we just need to see if the input is the same as the cleaned RESRT
simd_float4x4 noShearMatrix = RESRTMatrix(srt);
if (!simd_almost_equal_elements(transform, noShearMatrix, tolerance)) {
RELEASE_LOG_ERROR(ModelElement, "Rejecting shear matrix");
return false;
}
return true;
}
void ModelProcessModelPlayerTransformState::setEntityTransform(WebCore::TransformationMatrix entityTransform)
{
ASSERT(m_stageModeOperation == WebCore::StageModeOperation::None);
if (transformSupported(entityTransform))
m_entityTransform = entityTransform;
}
bool ModelProcessModelPlayerTransformState::isEntityTransformSupported(const WebCore::TransformationMatrix& transform) const
{
return transformSupported(transform);
}
void ModelProcessModelPlayerTransformState::setHasPortal(bool hasPortal)
{
if (m_hasPortal == hasPortal)
return;
m_hasPortal = hasPortal;
// FIXME: Recalculate entity transform
// Invalidate m_entityTransform for now so the entityTransform can be recomputed on reload.
m_entityTransform = std::nullopt;
}
void ModelProcessModelPlayerTransformState::setStageMode(WebCore::StageModeOperation stageModeOperation)
{
if (m_stageModeOperation == stageModeOperation)
return;
m_stageModeOperation = stageModeOperation;
// FIXME: recalculate entity transform
// Invalidate m_entityTransform for now so the entityTransform can be recomputed on reload.
m_entityTransform = std::nullopt;
}
}
#endif
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