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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/modules/xr/xr_target_ray_space.h"
#include <string>
#include <utility>
#include "third_party/blink/renderer/modules/xr/xr_input_source.h"
#include "third_party/blink/renderer/modules/xr/xr_pose.h"
#include "third_party/blink/renderer/modules/xr/xr_session.h"
namespace blink {
XRTargetRaySpace::XRTargetRaySpace(XRSession* session, XRInputSource* source)
: XRSpace(session), input_source_(source) {}
std::optional<gfx::Transform> XRTargetRaySpace::MojoFromNative() const {
auto mojo_from_viewer = session()->GetMojoFrom(
device::mojom::blink::XRReferenceSpaceType::kViewer);
switch (input_source_->TargetRayMode()) {
case device::mojom::XRTargetRayMode::TAPPING: {
// If the pointer origin is the screen, we need mojo_from_viewer, as the
// viewer space is the input space.
// So our result will be mojo_from_viewer * viewer_from_pointer
if (!(mojo_from_viewer && input_source_->InputFromPointer()))
return std::nullopt;
return *mojo_from_viewer * *(input_source_->InputFromPointer());
}
case device::mojom::XRTargetRayMode::GAZING: {
// If the pointer origin is gaze, then the pointer offset is just
// mojo_from_viewer.
return mojo_from_viewer;
}
case device::mojom::XRTargetRayMode::POINTING: {
// mojo_from_pointer is just: MojoFromInput*InputFromPointer;
if (!(input_source_->MojoFromInput() &&
input_source_->InputFromPointer()))
return std::nullopt;
return *(input_source_->MojoFromInput()) *
*(input_source_->InputFromPointer());
}
}
}
bool XRTargetRaySpace::EmulatedPosition() const {
return input_source_->emulatedPosition();
}
device::mojom::blink::XRNativeOriginInformationPtr
XRTargetRaySpace::NativeOrigin() const {
return device::mojom::blink::XRNativeOriginInformation::
NewInputSourceSpaceInfo(device::mojom::blink::XRInputSourceSpaceInfo::New(
input_source_->source_id(),
device::mojom::blink::XRInputSourceSpaceType::kTargetRay));
}
std::string XRTargetRaySpace::ToString() const {
return "XRTargetRaySpace";
}
bool XRTargetRaySpace::IsStationary() const {
// Target ray space is a space derived off of input source, so it is not
// considered stationary.
return false;
}
void XRTargetRaySpace::Trace(Visitor* visitor) const {
visitor->Trace(input_source_);
XRSpace::Trace(visitor);
}
} // namespace blink
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