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chromium / chromium / src / 19a88e4b2913260107e23dc43adf5b243a48d4f9 / . / base / win / win_util.cc
blob: d40cff2b2e0da4956592def36ab38e96ece3475b [file] [log] [blame]
// Copyright (c) 2012 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 "base/win/win_util.h"
#include <aclapi.h>
#include <cfgmgr32.h>
#include <initguid.h>
#include <powrprof.h>
#include <shobjidl.h> // Must be before propkey.
#include <inspectable.h>
#include <mdmregistration.h>
#include <objbase.h>
#include <propkey.h>
#include <psapi.h>
#include <roapi.h>
#include <sddl.h>
#include <setupapi.h>
#include <shellscalingapi.h>
#include <signal.h>
#include <stddef.h>
#include <stdlib.h>
#include <strsafe.h>
#include <tchar.h> // Must be before tpcshrd.h or for any use of _T macro
#include <tpcshrd.h>
#include <uiviewsettingsinterop.h>
#include <windows.ui.viewmanagement.h>
#include <winstring.h>
#include <wrl/client.h>
#include <wrl/wrappers/corewrappers.h>
#include <memory>
#include "base/base_switches.h"
#include "base/command_line.h"
#include "base/files/file_path.h"
#include "base/logging.h"
#include "base/macros.h"
#include "base/scoped_native_library.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "base/strings/utf_string_conversions.h"
#include "base/threading/thread_restrictions.h"
#include "base/win/core_winrt_util.h"
#include "base/win/propvarutil.h"
#include "base/win/registry.h"
#include "base/win/scoped_co_mem.h"
#include "base/win/scoped_handle.h"
#include "base/win/scoped_hstring.h"
#include "base/win/scoped_propvariant.h"
#include "base/win/shlwapi.h"
#include "base/win/win_client_metrics.h"
#include "base/win/windows_version.h"
namespace base {
namespace win {
namespace {
// Sets the value of |property_key| to |property_value| in |property_store|.
bool SetPropVariantValueForPropertyStore(
IPropertyStore* property_store,
const PROPERTYKEY& property_key,
const ScopedPropVariant& property_value) {
DCHECK(property_store);
HRESULT result = property_store->SetValue(property_key, property_value.get());
if (result == S_OK)
result = property_store->Commit();
if (SUCCEEDED(result))
return true;
#if DCHECK_IS_ON()
if (HRESULT_FACILITY(result) == FACILITY_WIN32)
::SetLastError(HRESULT_CODE(result));
// See third_party/perl/c/i686-w64-mingw32/include/propkey.h for GUID and
// PID definitions.
DPLOG(ERROR) << "Failed to set property with GUID "
<< String16FromGUID(property_key.fmtid) << " PID "
<< property_key.pid;
#endif
return false;
}
void __cdecl ForceCrashOnSigAbort(int) {
*((volatile int*)0) = 0x1337;
}
// Returns the current platform role. We use the PowerDeterminePlatformRoleEx
// API for that.
POWER_PLATFORM_ROLE GetPlatformRole() {
return PowerDeterminePlatformRoleEx(POWER_PLATFORM_ROLE_V2);
}
// Method used for Windows 8.1 and later.
// Since we support versions earlier than 8.1, we must dynamically load this
// function from user32.dll, so it won't fail to load in runtime. For earlier
// Windows versions GetProcAddress will return null and report failure so that
// callers can fall back on the deprecated SetProcessDPIAware.
bool SetProcessDpiAwarenessWrapper(PROCESS_DPI_AWARENESS value) {
if (!IsUser32AndGdi32Available())
return false;
static const auto set_process_dpi_awareness_func =
reinterpret_cast<decltype(&::SetProcessDpiAwareness)>(
GetUser32FunctionPointer("SetProcessDpiAwarenessInternal"));
if (set_process_dpi_awareness_func) {
HRESULT hr = set_process_dpi_awareness_func(value);
if (SUCCEEDED(hr))
return true;
DLOG_IF(ERROR, hr == E_ACCESSDENIED)
<< "Access denied error from SetProcessDpiAwarenessInternal. "
"Function called twice, or manifest was used.";
NOTREACHED()
<< "SetProcessDpiAwarenessInternal failed with unexpected error: "
<< hr;
return false;
}
DCHECK_LT(GetVersion(), Version::WIN8_1) << "SetProcessDpiAwarenessInternal "
"should be available on all "
"platforms >= Windows 8.1";
return false;
}
// Enable V2 per-monitor high-DPI support for the process. This will cause
// Windows to scale dialogs, comctl32 controls, context menus, and non-client
// area owned by this process on a per-monitor basis. If per-monitor V2 is not
// available (i.e., prior to Windows 10 1703) or fails, returns false.
// https://docs.microsoft.com/en-us/windows/desktop/hidpi/dpi-awareness-context
bool EnablePerMonitorV2() {
if (!IsUser32AndGdi32Available())
return false;
static const auto set_process_dpi_awareness_context_func =
reinterpret_cast<decltype(&::SetProcessDpiAwarenessContext)>(
GetUser32FunctionPointer("SetProcessDpiAwarenessContext"));
if (set_process_dpi_awareness_context_func) {
return set_process_dpi_awareness_context_func(
DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2);
}
DCHECK_LT(GetVersion(), Version::WIN10_RS2)
<< "SetProcessDpiAwarenessContext should be available on all platforms"
" >= Windows 10 Redstone 2";
return false;
}
bool* GetDomainEnrollmentStateStorage() {
static bool state = IsOS(OS_DOMAINMEMBER);
return &state;
}
bool* GetRegisteredWithManagementStateStorage() {
static bool state = []() {
ScopedNativeLibrary library(
FilePath(FILE_PATH_LITERAL("MDMRegistration.dll")));
if (!library.is_valid())
return false;
using IsDeviceRegisteredWithManagementFunction =
decltype(&::IsDeviceRegisteredWithManagement);
IsDeviceRegisteredWithManagementFunction
is_device_registered_with_management_function =
reinterpret_cast<IsDeviceRegisteredWithManagementFunction>(
library.GetFunctionPointer("IsDeviceRegisteredWithManagement"));
if (!is_device_registered_with_management_function)
return false;
BOOL is_managed = FALSE;
HRESULT hr =
is_device_registered_with_management_function(&is_managed, 0, nullptr);
return SUCCEEDED(hr) && is_managed;
}();
return &state;
}
NativeLibrary PinUser32Internal(NativeLibraryLoadError* error) {
static NativeLibraryLoadError load_error;
static const NativeLibrary user32_module =
PinSystemLibrary(FILE_PATH_LITERAL("user32.dll"), &load_error);
if (!user32_module && error)
error->code = load_error.code;
return user32_module;
}
} // namespace
// Uses the Windows 10 WRL API's to query the current system state. The API's
// we are using in the function below are supported in Win32 apps as per msdn.
// It looks like the API implementation is buggy at least on Surface 4 causing
// it to always return UserInteractionMode_Touch which as per documentation
// indicates tablet mode.
bool IsWindows10TabletMode(HWND hwnd) {
if (GetVersion() < Version::WIN10)
return false;
if (!ResolveCoreWinRTDelayload() ||
!ScopedHString::ResolveCoreWinRTStringDelayload()) {
return false;
}
ScopedHString view_settings_guid = ScopedHString::Create(
RuntimeClass_Windows_UI_ViewManagement_UIViewSettings);
Microsoft::WRL::ComPtr<IUIViewSettingsInterop> view_settings_interop;
HRESULT hr = base::win::RoGetActivationFactory(
view_settings_guid.get(), IID_PPV_ARGS(&view_settings_interop));
if (FAILED(hr))
return false;
Microsoft::WRL::ComPtr<ABI::Windows::UI::ViewManagement::IUIViewSettings>
view_settings;
hr = view_settings_interop->GetForWindow(hwnd, IID_PPV_ARGS(&view_settings));
if (FAILED(hr))
return false;
ABI::Windows::UI::ViewManagement::UserInteractionMode mode =
ABI::Windows::UI::ViewManagement::UserInteractionMode_Mouse;
view_settings->get_UserInteractionMode(&mode);
return mode == ABI::Windows::UI::ViewManagement::UserInteractionMode_Touch;
}
// Returns true if a physical keyboard is detected on Windows 8 and up.
// Uses the Setup APIs to enumerate the attached keyboards and returns true
// if the keyboard count is 1 or more.. While this will work in most cases
// it won't work if there are devices which expose keyboard interfaces which
// are attached to the machine.
bool IsKeyboardPresentOnSlate(std::string* reason, HWND hwnd) {
bool result = false;
if (GetVersion() < Version::WIN8) {
if (reason)
*reason = "Detection not supported";
return false;
}
// This function is only supported for Windows 8 and up.
if (CommandLine::ForCurrentProcess()->HasSwitch(
switches::kDisableUsbKeyboardDetect)) {
if (reason)
*reason = "Detection disabled";
return false;
}
// This function should be only invoked for machines with touch screens.
if ((GetSystemMetrics(SM_DIGITIZER) & NID_INTEGRATED_TOUCH)
!= NID_INTEGRATED_TOUCH) {
if (reason) {
*reason += "NID_INTEGRATED_TOUCH\n";
result = true;
} else {
return true;
}
}
// If it is a tablet device we assume that there is no keyboard attached.
if (IsTabletDevice(reason, hwnd)) {
if (reason)
*reason += "Tablet device.\n";
return false;
} else {
if (reason) {
*reason += "Not a tablet device";
result = true;
} else {
return true;
}
}
// To determine whether a keyboard is present on the device, we do the
// following:-
// 1. Check whether the device supports auto rotation. If it does then
// it possibly supports flipping from laptop to slate mode. If it
// does not support auto rotation, then we assume it is a desktop
// or a normal laptop and assume that there is a keyboard.
// 2. If the device supports auto rotation, then we get its platform role
// and check the system metric SM_CONVERTIBLESLATEMODE to see if it is
// being used in slate mode. If yes then we return false here to ensure
// that the OSK is displayed.
// 3. If step 1 and 2 fail then we check attached keyboards and return true
// if we find ACPI\* or HID\VID* keyboards.
typedef BOOL (WINAPI* GetAutoRotationState)(PAR_STATE state);
static const auto get_rotation_state = reinterpret_cast<GetAutoRotationState>(
GetUser32FunctionPointer("GetAutoRotationState"));
if (get_rotation_state) {
AR_STATE auto_rotation_state = AR_ENABLED;
get_rotation_state(&auto_rotation_state);
if ((auto_rotation_state & AR_NOSENSOR) ||
(auto_rotation_state & AR_NOT_SUPPORTED)) {
// If there is no auto rotation sensor or rotation is not supported in
// the current configuration, then we can assume that this is a desktop
// or a traditional laptop.
if (reason) {
*reason += (auto_rotation_state & AR_NOSENSOR) ? "AR_NOSENSOR\n"
: "AR_NOT_SUPPORTED\n";
result = true;
} else {
return true;
}
}
}
const GUID KEYBOARD_CLASS_GUID =
{ 0x4D36E96B, 0xE325, 0x11CE,
{ 0xBF, 0xC1, 0x08, 0x00, 0x2B, 0xE1, 0x03, 0x18 } };
// Query for all the keyboard devices.
HDEVINFO device_info =
SetupDiGetClassDevs(&KEYBOARD_CLASS_GUID, NULL, NULL, DIGCF_PRESENT);
if (device_info == INVALID_HANDLE_VALUE) {
if (reason)
*reason += "No keyboard info\n";
return result;
}
// Enumerate all keyboards and look for ACPI\PNP and HID\VID devices. If
// the count is more than 1 we assume that a keyboard is present. This is
// under the assumption that there will always be one keyboard device.
for (DWORD i = 0;; ++i) {
SP_DEVINFO_DATA device_info_data = { 0 };
device_info_data.cbSize = sizeof(device_info_data);
if (!SetupDiEnumDeviceInfo(device_info, i, &device_info_data))
break;
// Get the device ID.
char16 device_id[MAX_DEVICE_ID_LEN];
CONFIGRET status =
CM_Get_Device_ID(device_info_data.DevInst, as_writable_wcstr(device_id),
MAX_DEVICE_ID_LEN, 0);
if (status == CR_SUCCESS) {
// To reduce the scope of the hack we only look for ACPI and HID\\VID
// prefixes in the keyboard device ids.
if (StartsWith(device_id, STRING16_LITERAL("ACPI"),
CompareCase::INSENSITIVE_ASCII) ||
StartsWith(device_id, STRING16_LITERAL("HID\\VID"),
CompareCase::INSENSITIVE_ASCII)) {
if (reason) {
*reason += "device: ";
*reason += UTF16ToUTF8(device_id);
*reason += '\n';
}
// The heuristic we are using is to check the count of keyboards and
// return true if the API's report one or more keyboards. Please note
// that this will break for non keyboard devices which expose a
// keyboard PDO.
result = true;
}
}
}
return result;
}
static bool g_crash_on_process_detach = false;
void GetNonClientMetrics(NONCLIENTMETRICS_XP* metrics) {
DCHECK(metrics);
metrics->cbSize = sizeof(*metrics);
const bool success = !!SystemParametersInfo(
SPI_GETNONCLIENTMETRICS,
metrics->cbSize,
reinterpret_cast<NONCLIENTMETRICS*>(metrics),
0);
DCHECK(success);
}
bool GetUserSidString(string16* user_sid) {
// Get the current token.
HANDLE token = NULL;
if (!::OpenProcessToken(::GetCurrentProcess(), TOKEN_QUERY, &token))
return false;
ScopedHandle token_scoped(token);
DWORD size = sizeof(TOKEN_USER) + SECURITY_MAX_SID_SIZE;
std::unique_ptr<BYTE[]> user_bytes(new BYTE[size]);
TOKEN_USER* user = reinterpret_cast<TOKEN_USER*>(user_bytes.get());
if (!::GetTokenInformation(token, TokenUser, user, size, &size))
return false;
if (!user->User.Sid)
return false;
// Convert the data to a string.
wchar_t* sid_string;
if (!::ConvertSidToStringSid(user->User.Sid, &sid_string))
return false;
*user_sid = as_u16cstr(sid_string);
::LocalFree(sid_string);
return true;
}
bool UserAccountControlIsEnabled() {
// This can be slow if Windows ends up going to disk. Should watch this key
// for changes and only read it once, preferably on the file thread.
// http://code.google.com/p/chromium/issues/detail?id=61644
ThreadRestrictions::ScopedAllowIO allow_io;
RegKey key(
HKEY_LOCAL_MACHINE,
STRING16_LITERAL(
"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\System"),
KEY_READ);
DWORD uac_enabled;
if (key.ReadValueDW(STRING16_LITERAL("EnableLUA"), &uac_enabled) !=
ERROR_SUCCESS) {
return true;
}
// Users can set the EnableLUA value to something arbitrary, like 2, which
// Vista will treat as UAC enabled, so we make sure it is not set to 0.
return (uac_enabled != 0);
}
bool SetBooleanValueForPropertyStore(IPropertyStore* property_store,
const PROPERTYKEY& property_key,
bool property_bool_value) {
ScopedPropVariant property_value;
if (FAILED(InitPropVariantFromBoolean(property_bool_value,
property_value.Receive()))) {
return false;
}
return SetPropVariantValueForPropertyStore(property_store,
property_key,
property_value);
}
bool SetStringValueForPropertyStore(IPropertyStore* property_store,
const PROPERTYKEY& property_key,
const char16* property_string_value) {
ScopedPropVariant property_value;
if (FAILED(InitPropVariantFromString(as_wcstr(property_string_value),
property_value.Receive()))) {
return false;
}
return SetPropVariantValueForPropertyStore(property_store,
property_key,
property_value);
}
bool SetClsidForPropertyStore(IPropertyStore* property_store,
const PROPERTYKEY& property_key,
const CLSID& property_clsid_value) {
ScopedPropVariant property_value;
if (FAILED(InitPropVariantFromCLSID(property_clsid_value,
property_value.Receive()))) {
return false;
}
return SetPropVariantValueForPropertyStore(property_store, property_key,
property_value);
}
bool SetAppIdForPropertyStore(IPropertyStore* property_store,
const char16* app_id) {
// App id should be less than 64 chars and contain no space. And recommended
// format is CompanyName.ProductName[.SubProduct.ProductNumber].
// See http://msdn.microsoft.com/en-us/library/dd378459%28VS.85%29.aspx
DCHECK_LT(lstrlen(as_wcstr(app_id)), 64);
DCHECK_EQ(wcschr(as_wcstr(app_id), L' '), nullptr);
return SetStringValueForPropertyStore(property_store,
PKEY_AppUserModel_ID,
app_id);
}
static const char16 kAutoRunKeyPath[] =
STRING16_LITERAL("Software\\Microsoft\\Windows\\CurrentVersion\\Run");
bool AddCommandToAutoRun(HKEY root_key, const string16& name,
const string16& command) {
RegKey autorun_key(root_key, kAutoRunKeyPath, KEY_SET_VALUE);
return (autorun_key.WriteValue(name.c_str(), command.c_str()) ==
ERROR_SUCCESS);
}
bool RemoveCommandFromAutoRun(HKEY root_key, const string16& name) {
RegKey autorun_key(root_key, kAutoRunKeyPath, KEY_SET_VALUE);
return (autorun_key.DeleteValue(name.c_str()) == ERROR_SUCCESS);
}
bool ReadCommandFromAutoRun(HKEY root_key,
const string16& name,
string16* command) {
RegKey autorun_key(root_key, kAutoRunKeyPath, KEY_QUERY_VALUE);
return (autorun_key.ReadValue(name.c_str(), command) == ERROR_SUCCESS);
}
void SetShouldCrashOnProcessDetach(bool crash) {
g_crash_on_process_detach = crash;
}
bool ShouldCrashOnProcessDetach() {
return g_crash_on_process_detach;
}
void SetAbortBehaviorForCrashReporting() {
// Prevent CRT's abort code from prompting a dialog or trying to "report" it.
// Disabling the _CALL_REPORTFAULT behavior is important since otherwise it
// has the sideffect of clearing our exception filter, which means we
// don't get any crash.
_set_abort_behavior(0, _WRITE_ABORT_MSG | _CALL_REPORTFAULT);
// Set a SIGABRT handler for good measure. We will crash even if the default
// is left in place, however this allows us to crash earlier. And it also
// lets us crash in response to code which might directly call raise(SIGABRT)
signal(SIGABRT, ForceCrashOnSigAbort);
}
bool IsTabletDevice(std::string* reason, HWND hwnd) {
if (GetVersion() < Version::WIN8) {
if (reason)
*reason = "Tablet device detection not supported below Windows 8\n";
return false;
}
if (IsWindows10TabletMode(hwnd))
return true;
return IsDeviceUsedAsATablet(reason);
}
// This method is used to set the right interactions media queries,
// see https://drafts.csswg.org/mediaqueries-4/#mf-interaction. It doesn't
// check the Windows 10 tablet mode because it doesn't reflect the actual
// input configuration of the device and can be manually triggered by the user
// independently from the hardware state.
bool IsDeviceUsedAsATablet(std::string* reason) {
if (GetVersion() < Version::WIN8) {
if (reason)
*reason = "Tablet device detection not supported below Windows 8\n";
return false;
}
if (GetSystemMetrics(SM_MAXIMUMTOUCHES) == 0) {
if (reason) {
*reason += "Device does not support touch.\n";
} else {
return false;
}
}
// If the device is docked, the user is treating the device as a PC.
if (GetSystemMetrics(SM_SYSTEMDOCKED) != 0) {
if (reason) {
*reason += "SM_SYSTEMDOCKED\n";
} else {
return false;
}
}
// If the device is not supporting rotation, it's unlikely to be a tablet,
// a convertible or a detachable.
// See
// https://msdn.microsoft.com/en-us/library/windows/desktop/dn629263(v=vs.85).aspx
typedef decltype(GetAutoRotationState)* GetAutoRotationStateType;
static const auto get_auto_rotation_state_func =
reinterpret_cast<GetAutoRotationStateType>(
GetUser32FunctionPointer("GetAutoRotationState"));
if (get_auto_rotation_state_func) {
AR_STATE rotation_state = AR_ENABLED;
if (get_auto_rotation_state_func(&rotation_state) &&
(rotation_state & (AR_NOT_SUPPORTED | AR_LAPTOP | AR_NOSENSOR)) != 0)
return false;
}
// PlatformRoleSlate was added in Windows 8+.
POWER_PLATFORM_ROLE role = GetPlatformRole();
bool is_tablet = false;
if (role == PlatformRoleMobile || role == PlatformRoleSlate) {
is_tablet = !GetSystemMetrics(SM_CONVERTIBLESLATEMODE);
if (!is_tablet) {
if (reason) {
*reason += "Not in slate mode.\n";
} else {
return false;
}
} else {
if (reason) {
*reason += (role == PlatformRoleMobile) ? "PlatformRoleMobile\n"
: "PlatformRoleSlate\n";
}
}
} else {
if (reason)
*reason += "Device role is not mobile or slate.\n";
}
return is_tablet;
}
bool IsEnrolledToDomain() {
return *GetDomainEnrollmentStateStorage();
}
bool IsDeviceRegisteredWithManagement() {
return *GetRegisteredWithManagementStateStorage();
}
bool IsUser32AndGdi32Available() {
static auto is_user32_and_gdi32_available = []() {
// If win32k syscalls aren't disabled, then user32 and gdi32 are available.
// Can't disable win32k prior to windows 8.
if (GetVersion() < Version::WIN8)
return true;
typedef decltype(
GetProcessMitigationPolicy)* GetProcessMitigationPolicyType;
GetProcessMitigationPolicyType get_process_mitigation_policy_func =
reinterpret_cast<GetProcessMitigationPolicyType>(GetProcAddress(
GetModuleHandle(L"kernel32.dll"), "GetProcessMitigationPolicy"));
if (!get_process_mitigation_policy_func)
return true;
PROCESS_MITIGATION_SYSTEM_CALL_DISABLE_POLICY policy = {};
if (get_process_mitigation_policy_func(GetCurrentProcess(),
ProcessSystemCallDisablePolicy,
&policy, sizeof(policy))) {
return policy.DisallowWin32kSystemCalls == 0;
}
return true;
}();
return is_user32_and_gdi32_available;
}
bool GetLoadedModulesSnapshot(HANDLE process, std::vector<HMODULE>* snapshot) {
DCHECK(snapshot);
DCHECK_EQ(0u, snapshot->size());
snapshot->resize(128);
// We will retry at least once after first determining |bytes_required|. If
// the list of modules changes after we receive |bytes_required| we may retry
// more than once.
int retries_remaining = 5;
do {
DWORD bytes_required = 0;
// EnumProcessModules returns 'success' even if the buffer size is too
// small.
DCHECK_GE(std::numeric_limits<DWORD>::max(),
snapshot->size() * sizeof(HMODULE));
if (!::EnumProcessModules(
process, &(*snapshot)[0],
static_cast<DWORD>(snapshot->size() * sizeof(HMODULE)),
&bytes_required)) {
DPLOG(ERROR) << "::EnumProcessModules failed.";
return false;
}
DCHECK_EQ(0u, bytes_required % sizeof(HMODULE));
size_t num_modules = bytes_required / sizeof(HMODULE);
if (num_modules <= snapshot->size()) {
// Buffer size was too big, presumably because a module was unloaded.
snapshot->erase(snapshot->begin() + num_modules, snapshot->end());
return true;
} else if (num_modules == 0) {
DLOG(ERROR) << "Can't determine the module list size.";
return false;
} else {
// Buffer size was too small. Try again with a larger buffer. A little
// more room is given to avoid multiple expensive calls to
// ::EnumProcessModules() just because one module has been added.
snapshot->resize(num_modules + 8, NULL);
}
} while (--retries_remaining);
DLOG(ERROR) << "Failed to enumerate modules.";
return false;
}
void EnableFlicks(HWND hwnd) {
::RemoveProp(hwnd, MICROSOFT_TABLETPENSERVICE_PROPERTY);
}
void DisableFlicks(HWND hwnd) {
::SetProp(hwnd, MICROSOFT_TABLETPENSERVICE_PROPERTY,
reinterpret_cast<HANDLE>(TABLET_DISABLE_FLICKS |
TABLET_DISABLE_FLICKFALLBACKKEYS));
}
bool IsProcessPerMonitorDpiAware() {
enum class PerMonitorDpiAware {
UNKNOWN = 0,
PER_MONITOR_DPI_UNAWARE,
PER_MONITOR_DPI_AWARE,
};
static PerMonitorDpiAware per_monitor_dpi_aware = PerMonitorDpiAware::UNKNOWN;
if (per_monitor_dpi_aware == PerMonitorDpiAware::UNKNOWN) {
per_monitor_dpi_aware = PerMonitorDpiAware::PER_MONITOR_DPI_UNAWARE;
HMODULE shcore_dll = ::LoadLibrary(L"shcore.dll");
if (shcore_dll) {
auto get_process_dpi_awareness_func =
reinterpret_cast<decltype(::GetProcessDpiAwareness)*>(
::GetProcAddress(shcore_dll, "GetProcessDpiAwareness"));
if (get_process_dpi_awareness_func) {
PROCESS_DPI_AWARENESS awareness;
if (SUCCEEDED(get_process_dpi_awareness_func(nullptr, &awareness)) &&
awareness == PROCESS_PER_MONITOR_DPI_AWARE)
per_monitor_dpi_aware = PerMonitorDpiAware::PER_MONITOR_DPI_AWARE;
}
}
}
return per_monitor_dpi_aware == PerMonitorDpiAware::PER_MONITOR_DPI_AWARE;
}
void EnableHighDPISupport() {
if (!IsUser32AndGdi32Available())
return;
// Enable per-monitor V2 if it is available (Win10 1703 or later).
if (EnablePerMonitorV2())
return;
// Fall back to per-monitor DPI for older versions of Win10 instead of
// Win8.1 since Win8.1 does not have EnableChildWindowDpiMessage,
// necessary for correct non-client area scaling across monitors.
PROCESS_DPI_AWARENESS process_dpi_awareness =
GetVersion() >= Version::WIN10 ? PROCESS_PER_MONITOR_DPI_AWARE
: PROCESS_SYSTEM_DPI_AWARE;
if (!SetProcessDpiAwarenessWrapper(process_dpi_awareness)) {
// For windows versions where SetProcessDpiAwareness is not available or
// failed, try its predecessor.
BOOL result = ::SetProcessDPIAware();
DCHECK(result) << "SetProcessDPIAware failed.";
}
}
string16 String16FromGUID(REFGUID rguid) {
// This constant counts the number of characters in the formatted string,
// including the null termination character.
constexpr int kGuidStringCharacters =
1 + 8 + 1 + 4 + 1 + 4 + 1 + 4 + 1 + 12 + 1 + 1;
wchar_t guid_string[kGuidStringCharacters];
CHECK(SUCCEEDED(StringCchPrintfW(
guid_string, kGuidStringCharacters,
L"{%08lX-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X}", rguid.Data1,
rguid.Data2, rguid.Data3, rguid.Data4[0], rguid.Data4[1], rguid.Data4[2],
rguid.Data4[3], rguid.Data4[4], rguid.Data4[5], rguid.Data4[6],
rguid.Data4[7])));
return string16(as_u16cstr(guid_string), kGuidStringCharacters - 1);
}
bool PinUser32(NativeLibraryLoadError* error) {
return PinUser32Internal(error) != nullptr;
}
void* GetUser32FunctionPointer(const char* function_name,
NativeLibraryLoadError* error) {
NativeLibrary user32_module = PinUser32Internal(error);
if (user32_module)
return GetFunctionPointerFromNativeLibrary(user32_module, function_name);
return nullptr;
}
ScopedDomainStateForTesting::ScopedDomainStateForTesting(bool state)
: initial_state_(IsEnrolledToDomain()) {
*GetDomainEnrollmentStateStorage() = state;
}
ScopedDomainStateForTesting::~ScopedDomainStateForTesting() {
*GetDomainEnrollmentStateStorage() = initial_state_;
}
ScopedDeviceRegisteredWithManagementForTesting::
ScopedDeviceRegisteredWithManagementForTesting(bool state)
: initial_state_(IsDeviceRegisteredWithManagement()) {
*GetRegisteredWithManagementStateStorage() = state;
}
ScopedDeviceRegisteredWithManagementForTesting::
~ScopedDeviceRegisteredWithManagementForTesting() {
*GetRegisteredWithManagementStateStorage() = initial_state_;
}
} // namespace win
} // namespace base