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 <w32k.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     _SEH_TRY
  39     {
  40         ProbeForRead(lpDevMode, sizeof(DEVMODEW), 1);
  41         Size = lpDevMode->dmSize;
  42         ExtraSize = lpDevMode->dmDriverExtra;
  43     }
  44     _SEH_HANDLE
  45     {
  46         DPRINT("FIXME ? : Out of range of DEVMODEW size \n");
  47         _SEH_YIELD(return _SEH_GetExceptionCode());
  48     }
  49     _SEH_END;
  50
  51     if (Size != sizeof(DEVMODEW))
  52     {
  53         return STATUS_BUFFER_TOO_SMALL;
  54     }
  55
  56     pSafeDevMode = ExAllocatePool(PagedPool, Size + ExtraSize);
  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     _SEH_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     _SEH_HANDLE
 105     {
 106         Status = _SEH_GetExceptionCode();
 107     }
 108     _SEH_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;
 125    DEVMODEW DevMode;
 126    PUNICODE_STRING pSafeDeviceName = NULL;
 127    UNICODE_STRING SafeDeviceName;
 128    LONG Ret;
 129
 130    /* Check arguments */
 131 #ifdef CDS_VIDEOPARAMETERS
 132
 133    if (dwflags != CDS_VIDEOPARAMETERS && lParam != NULL)
 134 #else
 135
 136    if (lParam != NULL)
 137 #endif
 138
 139    {
 140       SetLastWin32Error(ERROR_INVALID_PARAMETER);
 141       return DISP_CHANGE_BADPARAM;
 142    }
 143    if (hwnd != NULL)
 144    {
 145       SetLastWin32Error(ERROR_INVALID_PARAMETER);
 146       return DISP_CHANGE_BADPARAM;
 147    }
 148
 149    /* Copy devmode */
 150    Status = MmCopyFromCaller(&DevMode.dmSize, &lpDevMode->dmSize, sizeof (DevMode.dmSize));
 151    if (!NT_SUCCESS(Status))
 152    {
 153       SetLastNtError(Status);
 154       return DISP_CHANGE_BADPARAM;
 155    }
 156    DevMode.dmSize = min(sizeof (DevMode), DevMode.dmSize);
 157    Status = MmCopyFromCaller(&DevMode, lpDevMode, DevMode.dmSize);
 158    if (!NT_SUCCESS(Status))
 159    {
 160       SetLastNtError(Status);
 161       return DISP_CHANGE_BADPARAM;
 162    }
 163    if (DevMode.dmDriverExtra > 0)
 164    {
 165       DbgPrint("(%s:%i) WIN32K: %s lpDevMode->dmDriverExtra is IGNORED!\n", __FILE__, __LINE__, __FUNCTION__);
 166       DevMode.dmDriverExtra = 0;
 167    }
 168
 169    /* Copy the device name */
 170    if (lpszDeviceName != NULL)
 171    {
 172       Status = IntSafeCopyUnicodeString(&SafeDeviceName, lpszDeviceName);
 173       if (!NT_SUCCESS(Status))
 174       {
 175          SetLastNtError(Status);
 176          return DISP_CHANGE_BADPARAM;
 177       }
 178       pSafeDeviceName = &SafeDeviceName;
 179    }
 180
 181    /* Call internal function */
 182    Ret = IntChangeDisplaySettings(pSafeDeviceName, &DevMode, dwflags, lParam);
 183
 184    if (pSafeDeviceName != NULL)
 185       RtlFreeUnicodeString(pSafeDeviceName);
 186
 187    return Ret;
 188 }
 189