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// Copyright 2019 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "device/vr/openxr/openxr_device.h"
#include <string>
#include "base/bind_helpers.h"
#include "build/build_config.h"
#include "device/vr/openxr/openxr_api_wrapper.h"
#include "device/vr/openxr/openxr_render_loop.h"
#include "device/vr/openxr/openxr_statics.h"
#include "device/vr/util/transform_utils.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
namespace device {
namespace {
constexpr float kFov = 45.0f;
constexpr unsigned int kRenderWidth = 1024;
constexpr unsigned int kRenderHeight = 1024;
// OpenXR doesn't give out display info until you start a session.
// However our mojo interface expects display info right away to support WebVR.
// We create a fake display info to use, then notify the client that the display
// info changed when we get real data.
mojom::VRDisplayInfoPtr CreateFakeVRDisplayInfo(device::mojom::XRDeviceId id) {
mojom::VRDisplayInfoPtr display_info = mojom::VRDisplayInfo::New();
display_info->id = id;
display_info->left_eye = mojom::VREyeParameters::New();
display_info->right_eye = mojom::VREyeParameters::New();
display_info->left_eye->field_of_view =
mojom::VRFieldOfView::New(kFov, kFov, kFov, kFov);
display_info->right_eye->field_of_view =
display_info->left_eye->field_of_view.Clone();
display_info->left_eye->head_from_eye =
vr_utils::DefaultHeadFromLeftEyeTransform();
display_info->right_eye->head_from_eye =
vr_utils::DefaultHeadFromRightEyeTransform();
display_info->left_eye->render_width = kRenderWidth;
display_info->left_eye->render_height = kRenderHeight;
display_info->right_eye->render_width = kRenderWidth;
display_info->right_eye->render_height = kRenderHeight;
return display_info;
}
} // namespace
// OpenXrDevice must not take ownership of the OpenXrStatics passed in.
// The OpenXrStatics object is owned by IsolatedXRRuntimeProvider.
OpenXrDevice::OpenXrDevice(OpenXrStatics* openxr_statics)
: VRDeviceBase(device::mojom::XRDeviceId::OPENXR_DEVICE_ID),
weak_ptr_factory_(this) {
mojom::VRDisplayInfoPtr display_info = CreateFakeVRDisplayInfo(GetId());
SetVRDisplayInfo(std::move(display_info));
#if defined(OS_WIN)
SetLuid(openxr_statics->GetLuid());
#endif
}
OpenXrDevice::~OpenXrDevice() {
// Wait for the render loop to stop before completing destruction. This will
// ensure that the render loop doesn't get shutdown while it is processing
// any requests.
if (render_loop_ && render_loop_->IsRunning()) {
render_loop_->Stop();
}
}
mojo::PendingRemote<mojom::XRCompositorHost>
OpenXrDevice::BindCompositorHost() {
return compositor_host_receiver_.BindNewPipeAndPassRemote();
}
void OpenXrDevice::EnsureRenderLoop() {
if (!render_loop_) {
auto on_info_changed = base::BindRepeating(&OpenXrDevice::SetVRDisplayInfo,
weak_ptr_factory_.GetWeakPtr());
render_loop_ =
std::make_unique<OpenXrRenderLoop>(std::move(on_info_changed));
}
}
void OpenXrDevice::RequestSession(
mojom::XRRuntimeSessionOptionsPtr options,
mojom::XRRuntime::RequestSessionCallback callback) {
DCHECK_EQ(options->mode, mojom::XRSessionMode::kImmersiveVr);
EnsureRenderLoop();
if (!render_loop_->IsRunning()) {
render_loop_->Start();
if (!render_loop_->IsRunning()) {
std::move(callback).Run(nullptr, mojo::NullRemote());
return;
}
if (overlay_receiver_) {
render_loop_->task_runner()->PostTask(
FROM_HERE, base::BindOnce(&XRCompositorCommon::RequestOverlay,
base::Unretained(render_loop_.get()),
std::move(overlay_receiver_)));
}
}
auto my_callback =
base::BindOnce(&OpenXrDevice::OnRequestSessionResult,
weak_ptr_factory_.GetWeakPtr(), std::move(callback));
auto on_visibility_state_changed = base::BindRepeating(
&OpenXrDevice::OnVisibilityStateChanged, weak_ptr_factory_.GetWeakPtr());
// OpenXr doesn't need to handle anything when presentation has ended, but
// the mojo interface to call to XRCompositorCommon::RequestSession requires
// a method and cannot take nullptr, so passing in base::DoNothing::Once()
// for on_presentation_ended
render_loop_->task_runner()->PostTask(
FROM_HERE, base::BindOnce(&XRCompositorCommon::RequestSession,
base::Unretained(render_loop_.get()),
base::DoNothing::Once(),
std::move(on_visibility_state_changed),
std::move(options), std::move(my_callback)));
}
void OpenXrDevice::OnRequestSessionResult(
mojom::XRRuntime::RequestSessionCallback callback,
bool result,
mojom::XRSessionPtr session) {
if (!result) {
std::move(callback).Run(nullptr, mojo::NullRemote());
return;
}
OnStartPresenting();
session->display_info = display_info_.Clone();
std::move(callback).Run(
std::move(session),
exclusive_controller_receiver_.BindNewPipeAndPassRemote());
// Use of Unretained is safe because the callback will only occur if the
// binding is not destroyed.
exclusive_controller_receiver_.set_disconnect_handler(
base::BindOnce(&OpenXrDevice::OnPresentingControllerMojoConnectionError,
base::Unretained(this)));
}
void OpenXrDevice::OnPresentingControllerMojoConnectionError() {
// This method is called when the rendering process exit presents.
if (render_loop_) {
render_loop_->task_runner()->PostTask(
FROM_HERE, base::BindOnce(&XRCompositorCommon::ExitPresent,
base::Unretained(render_loop_.get())));
}
OnExitPresent();
exclusive_controller_receiver_.reset();
}
void OpenXrDevice::SetFrameDataRestricted(bool restricted) {
// Presentation sessions can not currently be restricted.
NOTREACHED();
}
void OpenXrDevice::CreateImmersiveOverlay(
mojo::PendingReceiver<mojom::ImmersiveOverlay> overlay_receiver) {
EnsureRenderLoop();
if (render_loop_->IsRunning()) {
render_loop_->task_runner()->PostTask(
FROM_HERE, base::BindOnce(&XRCompositorCommon::RequestOverlay,
base::Unretained(render_loop_.get()),
std::move(overlay_receiver)));
} else {
overlay_receiver_ = std::move(overlay_receiver);
}
}
} // namespace device
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