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/*
* Copyright (C) 2025 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 "OpenXRHitTestManager.h"
#if ENABLE(WEBXR_HIT_TEST) && USE(OPENXR)
#include "OpenXRExtensions.h"
#include "OpenXRUtils.h"
namespace WebKit {
std::unique_ptr<OpenXRHitTestManager> OpenXRHitTestManager::create(XrInstance instance, XrSystemId systemId, XrSession session)
{
#if defined(XR_ANDROID_trackables) && defined(XR_ANDROID_raycast)
if (!OpenXRExtensions::singleton().methods().xrCreateTrackableTrackerANDROID)
return nullptr;
if (!OpenXRExtensions::singleton().methods().xrRaycastANDROID)
return nullptr;
auto manager = makeUnique<OpenXRHitTestManager>(instance, systemId, session);
if (!manager->m_trackableTrackers.size())
return nullptr;
return manager;
#else
return nullptr;
#endif
}
OpenXRHitTestManager::OpenXRHitTestManager(XrInstance instance, XrSystemId systemId, XrSession session)
: m_session(session)
{
#if defined(XR_ANDROID_trackables) && defined(XR_ANDROID_raycast)
uint32_t trackableTypeCapacity = 0;
uint32_t trackableTypeCountOutput = 0;
CHECK_XRCMD(OpenXRExtensions::singleton().methods().xrEnumerateRaycastSupportedTrackableTypesANDROID(instance, systemId, 0, &trackableTypeCapacity, nullptr));
Vector<XrTrackableTypeANDROID> types(trackableTypeCapacity);
CHECK_XRCMD(OpenXRExtensions::singleton().methods().xrEnumerateRaycastSupportedTrackableTypesANDROID(instance, systemId, trackableTypeCapacity, &trackableTypeCountOutput, types.mutableSpan().data()));
auto createInfo = createOpenXRStruct<XrTrackableTrackerCreateInfoANDROID, XR_TYPE_TRACKABLE_TRACKER_CREATE_INFO_ANDROID>();
for (auto type : types) {
switch (type) {
case XR_TRACKABLE_TYPE_PLANE_ANDROID:
case XR_TRACKABLE_TYPE_DEPTH_ANDROID: {
XrTrackableTrackerANDROID tracker = XR_NULL_HANDLE;
createInfo.trackableType = type;
CHECK_XRCMD(OpenXRExtensions::singleton().methods().xrCreateTrackableTrackerANDROID(session, &createInfo, &tracker));
m_trackableTrackers.append(tracker);
break;
}
default:
break;
}
}
#endif
}
OpenXRHitTestManager::~OpenXRHitTestManager()
{
#if defined(XR_ANDROID_trackables) && defined(XR_ANDROID_raycast)
for (const auto& tracker : m_trackableTrackers)
CHECK_XRCMD(OpenXRExtensions::singleton().methods().xrDestroyTrackableTrackerANDROID(tracker));
#endif
}
Vector<PlatformXR::FrameData::HitTestResult> OpenXRHitTestManager::requestHitTest(const PlatformXR::Ray& ray, XrSpace space, XrTime time)
{
#if defined(XR_ANDROID_raycast)
if (space == XR_NULL_HANDLE)
return { };
constexpr int maxHitTestResults = 2;
auto raycastInfo = createOpenXRStruct<XrRaycastInfoANDROID, XR_TYPE_RAYCAST_INFO_ANDROID>();
raycastInfo.maxResults = maxHitTestResults;
raycastInfo.trackerCount = m_trackableTrackers.size();
raycastInfo.trackers = m_trackableTrackers.span().data();
raycastInfo.origin = XrVector3f { ray.origin.x(), ray.origin.y(), ray.origin.z() };
raycastInfo.trajectory = XrVector3f { ray.direction.x(), ray.direction.y(), ray.direction.z() };
raycastInfo.space = space;
raycastInfo.time = time;
auto xrHitResults = createOpenXRStruct<XrRaycastHitResultsANDROID, XR_TYPE_RAYCAST_HIT_RESULTS_ANDROID>();
xrHitResults.resultsCapacityInput = 0;
xrHitResults.resultsCountOutput = 0;
xrHitResults.results = nullptr;
CHECK_XRCMD(OpenXRExtensions::singleton().methods().xrRaycastANDROID(m_session, &raycastInfo, &xrHitResults));
if (!xrHitResults.resultsCountOutput)
return { };
Vector<XrRaycastHitResultANDROID> xrResults;
xrResults.resize(xrHitResults.resultsCountOutput);
xrHitResults.resultsCapacityInput = xrHitResults.resultsCountOutput;
xrHitResults.results = xrResults.mutableSpan().data();
CHECK_XRCMD(OpenXRExtensions::singleton().methods().xrRaycastANDROID(m_session, &raycastInfo, &xrHitResults));
return xrResults.map([](auto& result) -> PlatformXR::FrameData::HitTestResult {
return { XrPosefToPose(result.pose) };
});
#else
return { };
#endif
}
} // namespace WebKit
#endif // ENABLE(WEBXR_HIT_TEST) && USE(OPENXR)
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