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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_util.h"
#include "device/vr/openxr/openxr_defs.h"
#include <d3d11.h>
#include <string>
#include <vector>
#include "base/check_op.h"
#include "base/stl_util.h"
#include "base/version.h"
#include "base/win/scoped_handle.h"
#include "build/build_config.h"
#include "components/version_info/version_info.h"
#include "third_party/openxr/src/include/openxr/openxr_platform.h"
namespace device {
XrPosef PoseIdentity() {
XrPosef pose{};
pose.orientation.w = 1;
return pose;
}
XrResult GetSystem(XrInstance instance, XrSystemId* system) {
XrSystemGetInfo system_info = {XR_TYPE_SYSTEM_GET_INFO};
system_info.formFactor = XR_FORM_FACTOR_HEAD_MOUNTED_DISPLAY;
return xrGetSystem(instance, &system_info, system);
}
#if defined(OS_WIN)
bool IsRunningInWin32AppContainer() {
base::win::ScopedHandle scopedProcessToken;
HANDLE processToken;
if (!OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, &processToken)) {
return false;
}
scopedProcessToken.Set(processToken);
BOOL isAppContainer;
DWORD dwSize = sizeof(BOOL);
if (!GetTokenInformation(scopedProcessToken.Get(), TokenIsAppContainer,
&isAppContainer, dwSize, &dwSize)) {
return false;
}
return isAppContainer;
}
#else
bool IsRunningInWin32AppContainer() {
return false;
}
#endif
XrResult CreateInstance(XrInstance* instance,
OpenXRInstanceMetadata* metadata) {
XrInstanceCreateInfo instance_create_info = {XR_TYPE_INSTANCE_CREATE_INFO};
std::string application_name = version_info::GetProductName() + " " +
version_info::GetMajorVersionNumber();
errno_t error =
strcpy_s(instance_create_info.applicationInfo.applicationName,
base::size(instance_create_info.applicationInfo.applicationName),
application_name.c_str());
DCHECK_EQ(error, 0);
base::Version version = version_info::GetVersion();
DCHECK_EQ(version.components().size(), 4uLL);
uint32_t build = version.components()[2];
// application version will be the build number of each vendor
instance_create_info.applicationInfo.applicationVersion = build;
error = strcpy_s(instance_create_info.applicationInfo.engineName,
base::size(instance_create_info.applicationInfo.engineName),
"Chromium");
DCHECK_EQ(error, 0);
// engine version should be the build number of chromium
instance_create_info.applicationInfo.engineVersion = build;
instance_create_info.applicationInfo.apiVersion = XR_CURRENT_API_VERSION;
uint32_t extensionCount;
RETURN_IF_XR_FAILED(xrEnumerateInstanceExtensionProperties(
nullptr, 0, &extensionCount, nullptr));
std::vector<XrExtensionProperties> extensionProperties(
extensionCount, {XR_TYPE_EXTENSION_PROPERTIES});
RETURN_IF_XR_FAILED(xrEnumerateInstanceExtensionProperties(
nullptr, extensionCount, &extensionCount, extensionProperties.data()));
// xrCreateInstance validates the list of extensions and returns
// XR_ERROR_EXTENSION_NOT_PRESENT if an extension is not supported,
// so we don't need to call xrEnumerateInstanceExtensionProperties
// to validate these extensions.
// Since the OpenXR backend only knows how to draw with D3D11 at the moment,
// the XR_KHR_D3D11_ENABLE_EXTENSION_NAME is required.
std::vector<const char*> extensions{XR_KHR_D3D11_ENABLE_EXTENSION_NAME};
// If we are in an app container, we must require the app container extension
// to ensure robust execution of the OpenXR runtime
if (IsRunningInWin32AppContainer()) {
// Add the win32 app container compatible extension to our list of
// extensions. If this runtime does not support execution in an app
// container environment, one of xrCreateInstance or xrGetSystem will fail.
extensions.push_back(kWin32AppcontainerCompatibleExtensionName);
}
// XR_MSFT_UNBOUNDED_REFERENCE_SPACE_EXTENSION_NAME, is required for optional
// functionality (unbounded reference spaces) and thus only requested if it is
// available.
auto extensionSupported = [&extensionProperties](const char* extensionName) {
return std::find_if(
extensionProperties.begin(), extensionProperties.end(),
[&extensionName](const XrExtensionProperties& properties) {
return strcmp(properties.extensionName, extensionName) == 0;
}) != extensionProperties.end();
};
const bool unboundedSpaceExtensionSupported =
extensionSupported(XR_MSFT_UNBOUNDED_REFERENCE_SPACE_EXTENSION_NAME);
if (unboundedSpaceExtensionSupported) {
extensions.push_back(XR_MSFT_UNBOUNDED_REFERENCE_SPACE_EXTENSION_NAME);
}
if (metadata != nullptr) {
metadata->unboundedReferenceSpaceSupported =
unboundedSpaceExtensionSupported;
}
instance_create_info.enabledExtensionCount =
static_cast<uint32_t>(extensions.size());
instance_create_info.enabledExtensionNames = extensions.data();
return xrCreateInstance(&instance_create_info, instance);
}
} // namespace device
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