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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.
*/
#pragma once
#if ENABLE(WEBXR) && USE(OPENXR)
#include "Logging.h"
#include <WebCore/PlatformXR.h>
#include <openxr/openxr.h>
#include <openxr/openxr_reflection.h>
#include <wtf/text/MakeString.h>
#include <wtf/text/WTFString.h>
namespace WebKit {
template<typename T, XrStructureType StructureType>
T createOpenXRStruct()
{
T object;
zeroBytes(object);
object.type = StructureType;
object.next = nullptr;
return object;
}
#define STRINGIFY(x) #x
#define TOSTRING(x) STRINGIFY(x)
#define FILE_AND_LINE __FILE__ ":" TOSTRING(__LINE__)
// Macro to generate stringify functions for OpenXR enumerations based data provided in openxr_reflection.h
#define ENUM_CASE_STR(name, val) case name: return #name;
#define MAKE_TO_STRING_FUNC(enumType) \
inline const char* toString(enumType e) { \
switch (e) { \
XR_LIST_ENUM_##enumType(ENUM_CASE_STR) \
default: return "Unknown " #enumType; \
} \
}
MAKE_TO_STRING_FUNC(XrReferenceSpaceType);
MAKE_TO_STRING_FUNC(XrViewConfigurationType);
MAKE_TO_STRING_FUNC(XrEnvironmentBlendMode);
MAKE_TO_STRING_FUNC(XrSessionState);
MAKE_TO_STRING_FUNC(XrResult);
MAKE_TO_STRING_FUNC(XrFormFactor);
inline XrResult checkXrResult(XrResult res, const char* originator = nullptr, const char* sourceLocation = nullptr)
{
if (XR_FAILED(res))
LOG(XR, "OpenXR error: %s (%s) at %s", toString(res), originator ? originator : "unknown", sourceLocation ? sourceLocation : "unknown location");
return res;
}
#define CHECK_XRCMD(cmd) checkXrResult(cmd, #cmd, FILE_AND_LINE);
#define RETURN_RESULT_IF_FAILED(call, ...) \
{ \
auto xrResult = call; \
if (XR_FAILED(xrResult)) { \
LOG(XR, "%s %s: %s\n", __func__, #call, toString(xrResult)); \
return xrResult; \
} \
}
inline PlatformXR::FrameData::Pose XrIdentityPose()
{
return { { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f, 1.0f } };
}
inline PlatformXR::FrameData::Pose XrPosefToPose(XrPosef pose)
{
return { { pose.position.x, pose.position.y, pose.position.z }, { pose.orientation.x, pose.orientation.y, pose.orientation.z, pose.orientation.w } };
}
inline PlatformXR::FrameData::View XrViewToView(XrView view)
{
return { XrPosefToPose(view.pose), PlatformXR::FrameData::Fov { std::abs(view.fov.angleUp), std::abs(view.fov.angleDown), std::abs(view.fov.angleLeft), std::abs(view.fov.angleRight) } };
}
inline ASCIILiteral handednessToString(PlatformXR::XRHandedness handedness)
{
switch (handedness) {
case PlatformXR::XRHandedness::Left:
return "left"_s;
case PlatformXR::XRHandedness::Right:
return "right"_s;
default:
ASSERT_NOT_REACHED();
return { };
}
}
struct OpenXRSystemProperties {
bool supportsOrientationTracking { false };
bool supportsHandTracking { false };
};
inline OpenXRSystemProperties systemProperties(XrInstance instance, XrSystemId systemId)
{
XrSystemProperties xrSystemProperties = createOpenXRStruct<XrSystemProperties, XR_TYPE_SYSTEM_PROPERTIES>();
#if defined(XR_EXT_hand_tracking)
XrSystemHandTrackingPropertiesEXT handTrackingProperties = createOpenXRStruct<XrSystemHandTrackingPropertiesEXT, XR_TYPE_SYSTEM_HAND_TRACKING_PROPERTIES_EXT>();
handTrackingProperties.supportsHandTracking = XR_FALSE;
handTrackingProperties.next = xrSystemProperties.next;
xrSystemProperties.next = &handTrackingProperties;
#endif
CHECK_XRCMD(xrGetSystemProperties(instance, systemId, &xrSystemProperties));
return {
.supportsOrientationTracking = xrSystemProperties.trackingProperties.orientationTracking == XR_TRUE,
#if defined(XR_EXT_hand_tracking)
.supportsHandTracking = handTrackingProperties.supportsHandTracking == XR_TRUE
#else
.supportsHandTracking = false
#endif
};
}
} // namespace WebKit
#endif // ENABLE(WEBXR) && USE(OPENXR)
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