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Merge pull request #93985 from alvinhochun/windows-gpu-pref

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Respect integrated GPU preference in Windows Settings
This commit is contained in:
Rémi Verschelde
2024-08-28 00:11:45 +02:00
parent 6cb21a56fd 88581a7705
commit 330fca1ffd
4 changed files with 71 additions and 2 deletions
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66
platform/windows/os_windows.cpp
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@ -616,6 +616,72 @@ Vector<String> OS_Windows::get_video_adapter_driver_info() const {
return info;
}
bool OS_Windows::get_user_prefers_integrated_gpu() const {
// On Windows 10, the preferred GPU configured in Windows Settings is
// stored in the registry under the key
// `HKEY_CURRENT_USER\SOFTWARE\Microsoft\DirectX\UserGpuPreferences`
// with the name being the app ID or EXE path. The value is in the form of
// `GpuPreference=1;`, with the value being 1 for integrated GPU and 2
// for discrete GPU. On Windows 11, there may be more flags, separated
// by semicolons.
// If this is a packaged app, use the "application user model ID".
// Otherwise, use the EXE path.
WCHAR value_name[32768];
bool is_packaged = false;
{
HMODULE kernel32 = GetModuleHandleW(L"kernel32.dll");
if (kernel32) {
using GetCurrentApplicationUserModelIdPtr = LONG(WINAPI *)(UINT32 * length, PWSTR id);
GetCurrentApplicationUserModelIdPtr GetCurrentApplicationUserModelId = (GetCurrentApplicationUserModelIdPtr)GetProcAddress(kernel32, "GetCurrentApplicationUserModelId");
if (GetCurrentApplicationUserModelId) {
UINT32 length = sizeof(value_name) / sizeof(value_name[0]);
LONG result = GetCurrentApplicationUserModelId(&length, value_name);
if (result == ERROR_SUCCESS) {
is_packaged = true;
}
}
}
}
if (!is_packaged && GetModuleFileNameW(nullptr, value_name, sizeof(value_name) / sizeof(value_name[0])) >= sizeof(value_name) / sizeof(value_name[0])) {
// Paths should never be longer than 32767, but just in case.
return false;
}
LPCWSTR subkey = L"SOFTWARE\\Microsoft\\DirectX\\UserGpuPreferences";
HKEY hkey = nullptr;
LSTATUS result = RegOpenKeyExW(HKEY_CURRENT_USER, subkey, 0, KEY_READ, &hkey);
if (result != ERROR_SUCCESS) {
return false;
}
DWORD size = 0;
result = RegGetValueW(hkey, nullptr, value_name, RRF_RT_REG_SZ, nullptr, nullptr, &size);
if (result != ERROR_SUCCESS || size == 0) {
RegCloseKey(hkey);
return false;
}
Vector<WCHAR> buffer;
buffer.resize(size / sizeof(WCHAR));
result = RegGetValueW(hkey, nullptr, value_name, RRF_RT_REG_SZ, nullptr, (LPBYTE)buffer.ptrw(), &size);
if (result != ERROR_SUCCESS) {
RegCloseKey(hkey);
return false;
}
RegCloseKey(hkey);
const String flags = String::utf16((const char16_t *)buffer.ptr(), size / sizeof(WCHAR));
for (const String &flag : flags.split(";", false)) {
if (flag == "GpuPreference=1") {
return true;
}
}
return false;
}
OS::DateTime OS_Windows::get_datetime(bool p_utc) const {
SYSTEMTIME systemtime;
if (p_utc) {