reactos/subsystems/win32/win32k/ntuser/display.c

   1 /*
   2  * PROJECT:         ReactOS Kernel
   3  * LICENSE:         GPL - See COPYING in the top level directory
   4  * FILE:            subsystems/win32/win32k/ntuser/display.c
   5  * PURPOSE:         display settings
   6  * COPYRIGHT:       Copyright 2007 ReactOS
   7  *
   8  */
   9
  10 /* INCLUDES ******************************************************************/
  11
  12 #include <win32k.h>
  13
  14 #define NDEBUG
  15 #include <debug.h>
  16
  17 #define SIZEOF_DEVMODEW_300 188
  18 #define SIZEOF_DEVMODEW_400 212
  19 #define SIZEOF_DEVMODEW_500 220
  20
  21 /* PUBLIC FUNCTIONS ***********************************************************/
  22
  23 NTSTATUS
  24 APIENTRY
  25 NtUserEnumDisplaySettings(
  26    PUNICODE_STRING pusDeviceName,
  27    DWORD iModeNum,
  28    LPDEVMODEW lpDevMode, /* FIXME is this correct? */
  29    DWORD dwFlags )
  30 {
  31     NTSTATUS Status;
  32     LPDEVMODEW pSafeDevMode;
  33     PUNICODE_STRING pusSafeDeviceName = NULL;
  34     UNICODE_STRING usSafeDeviceName;
  35     USHORT Size = 0, ExtraSize = 0;
  36
  37     /* Copy the devmode */
  38     _SEH2_TRY
  39     {
  40         ProbeForRead(lpDevMode, sizeof(DEVMODEW), 1);
  41         Size = lpDevMode->dmSize;
  42         ExtraSize = lpDevMode->dmDriverExtra;
  43     }
  44     _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
  45     {
  46         DPRINT("FIXME ? : Out of range of DEVMODEW size \n");
  47         _SEH2_YIELD(return _SEH2_GetExceptionCode());
  48     }
  49     _SEH2_END;
  50
  51     if (Size != sizeof(DEVMODEW))
  52     {
  53         return STATUS_BUFFER_TOO_SMALL;
  54     }
  55
  56     pSafeDevMode = ExAllocatePoolWithTag(PagedPool, Size + ExtraSize, GDITAG_DEVMODE);
  57     if (pSafeDevMode == NULL)
  58     {
  59         return STATUS_NO_MEMORY;
  60     }
  61     pSafeDevMode->dmSize = Size;
  62     pSafeDevMode->dmDriverExtra = ExtraSize;
  63
  64     /* Copy the device name */
  65     if (pusDeviceName != NULL)
  66     {
  67         Status = IntSafeCopyUnicodeString(&usSafeDeviceName, pusDeviceName);
  68         if (!NT_SUCCESS(Status))
  69         {
  70             ExFreePool(pSafeDevMode);
  71             return Status;
  72         }
  73         pusSafeDeviceName = &usSafeDeviceName;
  74     }
  75
  76     /* Call internal function */
  77     Status = IntEnumDisplaySettings(pusSafeDeviceName, iModeNum, pSafeDevMode, dwFlags);
  78
  79     if (pusSafeDeviceName != NULL)
  80         RtlFreeUnicodeString(pusSafeDeviceName);
  81
  82     if (!NT_SUCCESS(Status))
  83     {
  84         ExFreePool(pSafeDevMode);
  85         return Status;
  86     }
  87
  88     /* Copy some information back */
  89     _SEH2_TRY
  90     {
  91         ProbeForWrite(lpDevMode,Size + ExtraSize, 1);
  92         lpDevMode->dmPelsWidth = pSafeDevMode->dmPelsWidth;
  93         lpDevMode->dmPelsHeight = pSafeDevMode->dmPelsHeight;
  94         lpDevMode->dmBitsPerPel = pSafeDevMode->dmBitsPerPel;
  95         lpDevMode->dmDisplayFrequency = pSafeDevMode->dmDisplayFrequency;
  96         lpDevMode->dmDisplayFlags = pSafeDevMode->dmDisplayFlags;
  97
  98         /* output private/extra driver data */
  99         if (ExtraSize > 0)
 100         {
 101             memcpy((PCHAR)lpDevMode + Size, (PCHAR)pSafeDevMode + Size, ExtraSize);
 102         }
 103     }
 104     _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
 105     {
 106         Status = _SEH2_GetExceptionCode();
 107     }
 108     _SEH2_END;
 109
 110     ExFreePool(pSafeDevMode);
 111     return Status;
 112 }
 113
 114
 115 LONG
 116 APIENTRY
 117 NtUserChangeDisplaySettings(
 118    PUNICODE_STRING lpszDeviceName,
 119    LPDEVMODEW lpDevMode,
 120    HWND hwnd,
 121    DWORD dwflags,
 122    LPVOID lParam)
 123 {
 124    NTSTATUS Status = STATUS_SUCCESS;
 125    LPDEVMODEW lpSafeDevMode = NULL;
 126    DEVMODEW DevMode;
 127    PUNICODE_STRING pSafeDeviceName = NULL;
 128    UNICODE_STRING SafeDeviceName;
 129    LONG Ret;
 130
 131    /* Check arguments */
 132 #ifdef CDS_VIDEOPARAMETERS
 133     if (dwflags != CDS_VIDEOPARAMETERS && lParam != NULL)
 134 #else
 135     if (lParam != NULL)
 136 #endif
 137     {
 138         SetLastWin32Error(ERROR_INVALID_PARAMETER);
 139         return DISP_CHANGE_BADPARAM;
 140     }
 141
 142     if (hwnd != NULL)
 143     {
 144         SetLastWin32Error(ERROR_INVALID_PARAMETER);
 145         return DISP_CHANGE_BADPARAM;
 146     }
 147
 148     /* Copy devmode */
 149     if (lpDevMode != NULL)
 150     {
 151         _SEH2_TRY
 152         {
 153             ProbeForRead(lpDevMode, sizeof(DevMode.dmSize), 1);
 154             DevMode.dmSize = lpDevMode->dmSize;
 155             DevMode.dmSize = min(sizeof(DevMode), DevMode.dmSize);
 156             ProbeForRead(lpDevMode, DevMode.dmSize, 1);
 157             RtlCopyMemory(&DevMode, lpDevMode, DevMode.dmSize);
 158         }
 159         _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
 160         {
 161             Status = _SEH2_GetExceptionCode();
 162         }
 163         _SEH2_END
 164
 165         if (!NT_SUCCESS(Status))
 166         {
 167             SetLastNtError(Status);
 168             return DISP_CHANGE_BADPARAM;
 169         }
 170
 171         if (DevMode.dmDriverExtra > 0)
 172         {
 173             DPRINT1("lpDevMode->dmDriverExtra is IGNORED!\n");
 174             DevMode.dmDriverExtra = 0;
 175         }
 176         lpSafeDevMode = &DevMode;
 177     }
 178
 179     /* Copy the device name */
 180     if (lpszDeviceName != NULL)
 181     {
 182         Status = IntSafeCopyUnicodeString(&SafeDeviceName, lpszDeviceName);
 183         if (!NT_SUCCESS(Status))
 184         {
 185             SetLastNtError(Status);
 186             return DISP_CHANGE_BADPARAM;
 187         }
 188         pSafeDeviceName = &SafeDeviceName;
 189     }
 190
 191     /* Call internal function */
 192     Ret = IntChangeDisplaySettings(pSafeDeviceName, lpSafeDevMode, dwflags, lParam);
 193
 194     if (pSafeDeviceName != NULL)
 195         RtlFreeUnicodeString(pSafeDeviceName);
 196
 197     return Ret;
 198 }
 199