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[idd] driver: move the ExtraMode registry key now permissions are correct

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This resolves the problem of this setting being essentially lost
between driver upgrades.
This commit is contained in:
Geoffrey McRae
2025-09-13 13:56:10 +10:00
committed by Geoffrey McRae
parent b83d70a068
commit 13ae3441cf
1 changed files with 40 additions and 47 deletions
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87
idd/LGIdd/CSettings.cpp
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@@ -68,76 +68,69 @@ void CSettings::LoadModes()
}
}
void CSettings::SetExtraMode(const DisplayMode & mode)
void CSettings::SetExtraMode(const DisplayMode& mode)
{
WCHAR buf[64];
_snwprintf_s(buf, _countof(buf), _TRUNCATE, L"%ux%u@%u%s",
mode.width, mode.height, mode.refresh, mode.preferred ? L"*" : L"");
mode.width, mode.height, mode.refresh,
mode.preferred ? L"*" : L"");
WDFKEY paramsKey = nullptr;
NTSTATUS status = WdfDriverOpenParametersRegistryKey(
WdfGetDriver(),
HKEY hKey = NULL;
DWORD disp = 0;
LONG ec = RegCreateKeyExW(
HKEY_LOCAL_MACHINE,
L"Software\\LookingGlass\\IDD",
0, NULL, REG_OPTION_NON_VOLATILE,
KEY_SET_VALUE,
WDF_NO_OBJECT_ATTRIBUTES,
&paramsKey
);
if (!NT_SUCCESS(status)) return;
NULL, &hKey, &disp);
UNICODE_STRING valName;
RtlInitUnicodeString(&valName, L"ExtraMode");
UNICODE_STRING uData;
RtlInitUnicodeString(&uData, buf);
WDFSTRING hStr = nullptr;
status = WdfStringCreate(&uData, WDF_NO_OBJECT_ATTRIBUTES, &hStr);
if (NT_SUCCESS(status)) {
status = WdfRegistryAssignString(paramsKey, &valName, hStr);
WdfObjectDelete(hStr);
if (ec != ERROR_SUCCESS)
{
DEBUG_INFO("Failed to write key");
return;
}
WdfRegistryClose(paramsKey);
const WCHAR* valueName = L"ExtraMode";
const DWORD cb = (DWORD)((wcslen(buf) + 1) * sizeof(WCHAR));
RegSetValueExW(hKey, valueName, 0, REG_SZ, (const BYTE*)buf, cb);
RegCloseKey(hKey);
}
bool CSettings::GetExtraMode(DisplayMode & mode)
bool CSettings::GetExtraMode(DisplayMode& mode)
{
WDFKEY paramsKey = nullptr;
NTSTATUS st = WdfDriverOpenParametersRegistryKey(
WdfGetDriver(),
HKEY hKey = nullptr;
LONG ec = RegOpenKeyExW(
HKEY_LOCAL_MACHINE,
L"Software\\LookingGlass\\IDD",
0,
KEY_QUERY_VALUE,
WDF_NO_OBJECT_ATTRIBUTES,
&paramsKey
&hKey
);
if (!NT_SUCCESS(st))
if (ec != ERROR_SUCCESS)
return false;
UNICODE_STRING name; RtlInitUnicodeString(&name, L"ExtraMode");
UNICODE_STRING empty; RtlInitUnicodeString(&empty, L"");
DWORD type = 0;
DWORD cb = 0;
WDFSTRING hStr = nullptr;
st = WdfStringCreate(&empty, WDF_NO_OBJECT_ATTRIBUTES, &hStr);
if (!NT_SUCCESS(st))
ec = RegQueryValueExW(hKey, L"ExtraMode", nullptr, &type, nullptr, &cb);
if (ec != ERROR_SUCCESS || (type != REG_SZ && type != REG_EXPAND_SZ) || cb == 0)
{
WdfRegistryClose(paramsKey);
RegCloseKey(hKey);
return false;
}
st = WdfRegistryQueryString(paramsKey, &name, hStr);
if (!NT_SUCCESS(st))
{
WdfObjectDelete(hStr);
WdfRegistryClose(paramsKey);
std::vector<wchar_t> buf(cb / sizeof(wchar_t) + 1);
ec = RegQueryValueExW(hKey, L"ExtraMode", nullptr, &type,
reinterpret_cast<LPBYTE>(buf.data()), &cb);
RegCloseKey(hKey);
if (ec != ERROR_SUCCESS)
return false;
}
UNICODE_STRING us{};
WdfStringGetUnicodeString(hStr, &us);
std::wstring s(us.Buffer, us.Length / sizeof(wchar_t));
WdfObjectDelete(hStr);
WdfRegistryClose(paramsKey);
buf.back() = L'\0';
std::wstring s(buf.data());
return ParseModeString(s, mode);
}