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     _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 = 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     _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
 134    if (dwflags != CDS_VIDEOPARAMETERS && lParam != NULL)
 135 #else
 136
 137    if (lParam != NULL)
 138 #endif
 139
 140    {
 141       SetLastWin32Error(ERROR_INVALID_PARAMETER);
 142       return DISP_CHANGE_BADPARAM;
 143    }
 144    if (hwnd != NULL)
 145    {
 146       SetLastWin32Error(ERROR_INVALID_PARAMETER);
 147       return DISP_CHANGE_BADPARAM;
 148    }
 149
 150    /* Copy devmode */
 151    if (lpDevMode != NULL)
 152    {
 153       _SEH2_TRY
 154       {
 155           ProbeForRead(lpDevMode, sizeof(DevMode.dmSize), 1);
 156           DevMode.dmSize = lpDevMode->dmSize;
 157           DevMode.dmSize = min(sizeof(DevMode), DevMode.dmSize);
 158           ProbeForRead(lpDevMode, DevMode.dmSize, 1);
 159           RtlCopyMemory(&DevMode, lpDevMode, DevMode.dmSize);
 160       }
 161       _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
 162       {
 163           Status = _SEH2_GetExceptionCode();
 164       }
 165       _SEH2_END
 166       if (!NT_SUCCESS(Status))
 167       {
 168          SetLastNtError(Status);
 169          return DISP_CHANGE_BADPARAM;
 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