Zhiyi Zhang (@zhiyi) commented about dlls/win32u/sysparams.c:
memset( &devmode->dmDriverExtra, 0, devmode->dmSize - offsetof(DEVMODEW, dmDriverExtra) );
if (index == ENUM_REGISTRY_SETTINGS) ret = read_registry_settings( adapter_path, devmode ); - else if (index != ENUM_CURRENT_SETTINGS) ret = user_driver->pEnumDisplaySettingsEx( device_name, index, devmode, flags ); + /* if EDS_ROTATEDMODE is not specified, enumerate modes with the same display orientation as current */ + else if (index != ENUM_CURRENT_SETTINGS && (flags & EDS_ROTATEDMODE)) ret = TRUE; else ret = user_driver->pGetCurrentDisplaySettings( device_name, devmode );
+ if (ret && index != ENUM_REGISTRY_SETTINGS && index != ENUM_CURRENT_SETTINGS) + { + for (ret = FALSE, mode = modes; mode && mode->dmSize && !ret; mode = NEXT_DEVMODEW(mode)) + { + if (!(flags & EDS_ROTATEDMODE) && mode->dmDisplayOrientation != devmode->dmDisplayOrientation) continue;
While this is correct, I prefer using indexed array access when EDS_ROTATEDMODE is present to avoid iterating the display mode list. -- https://gitlab.winehq.org/wine/wine/-/merge_requests/551#note_7849