https://git.reactos.org/?p=reactos.git;a=commitdiff;h=9acd895f1849350d7bc652ee55be2515ef80f98a
commit 9acd895f1849350d7bc652ee55be2515ef80f98a Author: Hervé Poussineau <[email protected]> AuthorDate: Sun May 22 14:21:34 2022 +0200 Commit: Hervé Poussineau <[email protected]> CommitDate: Sun May 22 17:32:40 2022 +0200 [WIN32SS] Copy loading of registry settings from mdevobj.c to new function This function will be used in next commit, and duplicated implementation in mdevobj.c will be dropped. --- win32ss/gdi/eng/device.c | 95 ++++++++++++++++++++++++++++++++++++++++++++++++ win32ss/gdi/eng/device.h | 13 +++++++ 2 files changed, 108 insertions(+) diff --git a/win32ss/gdi/eng/device.c b/win32ss/gdi/eng/device.c index 037b0261a47..2b96ca409c9 100644 --- a/win32ss/gdi/eng/device.c +++ b/win32ss/gdi/eng/device.c @@ -124,6 +124,101 @@ EngpUpdateGraphicsDeviceList(VOID) return STATUS_SUCCESS; } +/* Open display settings registry key + * Returns NULL in case of error. */ +static HKEY +EngpGetRegistryHandleFromDeviceMap( + _In_ PGRAPHICS_DEVICE pGraphicsDevice) +{ + static const PWCHAR KEY_VIDEO = L"\\Registry\\Machine\\HARDWARE\\DEVICEMAP\\VIDEO"; + HKEY hKey; + WCHAR szDeviceKey[256]; + ULONG cbSize; + NTSTATUS Status; + + /* Open the device map registry key */ + Status = RegOpenKey(KEY_VIDEO, &hKey); + if (!NT_SUCCESS(Status)) + { + ERR("Could not open HARDWARE\\DEVICEMAP\\VIDEO registry key: status 0x%08x\n", Status); + return NULL; + } + + /* Query the registry path */ + cbSize = sizeof(szDeviceKey); + RegQueryValue(hKey, + pGraphicsDevice->szNtDeviceName, + REG_SZ, + szDeviceKey, + &cbSize); + ZwClose(hKey); + + /* Open the registry key */ + Status = RegOpenKey(szDeviceKey, &hKey); + if (!NT_SUCCESS(Status)) + { + ERR("Could not open registry key '%S': status 0x%08x\n", szDeviceKey, Status); + return NULL; + } + + return hKey; +} + +NTSTATUS +EngpGetDisplayDriverParameters( + _In_ PGRAPHICS_DEVICE pGraphicsDevice, + _Out_ PDEVMODEW pdm, + _Out_opt_ PDWORD pdwAccelerationLevel) +{ + HKEY hKey; + DWORD dwDummy; + NTSTATUS Status; + RTL_QUERY_REGISTRY_TABLE DisplaySettingsTable[] = + { + { + NULL, + RTL_QUERY_REGISTRY_DIRECT, + L"Acceleration.Level", + pdwAccelerationLevel ? pdwAccelerationLevel : &dwDummy, + REG_NONE, NULL, 0 + }, +#define READ(field, str) \ + { \ + NULL, \ + RTL_QUERY_REGISTRY_DIRECT, \ + L ##str, \ + &pdm->field, \ + REG_NONE, NULL, 0 \ + }, + READ(dmBitsPerPel, "DefaultSettings.BitsPerPel") + READ(dmPelsWidth, "DefaultSettings.XResolution") + READ(dmPelsHeight, "DefaultSettings.YResolution") + READ(dmDisplayFlags, "DefaultSettings.Flags") + READ(dmDisplayFrequency, "DefaultSettings.VRefresh") + READ(dmPanningWidth, "DefaultSettings.XPanning") + READ(dmPanningHeight, "DefaultSettings.YPanning") + READ(dmDisplayOrientation, "DefaultSettings.Orientation") + READ(dmDisplayFixedOutput, "DefaultSettings.FixedOutput") + READ(dmPosition.x, "Attach.RelativeX") + READ(dmPosition.y, "Attach.RelativeY") +#undef READ + {0} + }; + + hKey = EngpGetRegistryHandleFromDeviceMap(pGraphicsDevice); + if (!hKey) + return STATUS_UNSUCCESSFUL; + + Status = RtlQueryRegistryValues(RTL_REGISTRY_HANDLE, + (PWSTR)hKey, + DisplaySettingsTable, + NULL, + NULL); + + ZwClose(hKey); + return Status; +} + extern VOID UserRefreshDisplay(IN PPDEVOBJ ppdev); diff --git a/win32ss/gdi/eng/device.h b/win32ss/gdi/eng/device.h index cb211d4c055..5791e5a5591 100644 --- a/win32ss/gdi/eng/device.h +++ b/win32ss/gdi/eng/device.h @@ -35,6 +35,19 @@ EngpRegisterGraphicsDevice( NTSTATUS EngpUpdateGraphicsDeviceList(VOID); +/* Read configuration of a graphics card from registry: + * - pGraphicsDevice: instance of the graphics card + * - pdm: on output, contains the values read in registry + * - pdwAccelerationLevel: acceleration level stored in registry + * Return value: a STATUS_* value + * Assume that pdm has already been zero-filled. + * Note that dmFields is not updated. */ +NTSTATUS +EngpGetDisplayDriverParameters( + _In_ PGRAPHICS_DEVICE pGraphicsDevice, + _Out_ PDEVMODEW pdm, + _Out_opt_ PDWORD pdwAccelerationLevel); + CODE_SEG("INIT") NTSTATUS NTAPI
