reactos/ntoskrnl/inbv/inbv.c

   1 /* $Id: inbv.c,v 1.2 2003/08/24 12:08:16 dwelch Exp $
   2  *
   3  * COPYRIGHT:      See COPYING in the top level directory
   4  * PROJECT:        ReactOS kernel
   5  * FILE:           ntoskrnl/inbv/inbv.c
   6  * PURPOSE:        Boot video support
   7  * PROGRAMMER:     Casper S. Hornstrup (chorns@users.sourceforge.net)
   8  * UPDATE HISTORY:
   9  *  12-07-2003 CSH Created
  10  */
  11
  12 /* INCLUDES ******************************************************************/
  13
  14 #include <roskrnl.h>
  15 #include <ntos/bootvid.h>
  16 #include <ddk/ntbootvid.h>
  17
  18 #define NDEBUG
  19 #include <internal/debug.h>
  20
  21
  22 /* GLOBALS *******************************************************************/
  23
  24 /* DATA **********************************************************************/
  25
  26 static HANDLE BootVidDevice = NULL;
  27 static BOOL BootVidDriverInstalled = FALSE;
  28 static NTBOOTVID_FUNCTION_TABLE BootVidFunctionTable;
  29
  30 /* FUNCTIONS *****************************************************************/
  31
  32 NTSTATUS
  33 STATIC
  34 InbvCheckBootVid(VOID)
  35 {
  36   IO_STATUS_BLOCK Iosb;
  37
  38   if (BootVidDevice == NULL)
  39     {
  40       NTSTATUS Status;
  41       OBJECT_ATTRIBUTES ObjectAttributes;
  42       UNICODE_STRING BootVidName;
  43
  44       RtlInitUnicodeStringFromLiteral(&BootVidName, L"\\Device\\BootVid");
  45       InitializeObjectAttributes(&ObjectAttributes,
  46                                  &BootVidName,
  47                                  0,
  48                                  NULL,
  49                                  NULL);
  50       Status = ZwOpenFile(&BootVidDevice,
  51                           FILE_ALL_ACCESS,
  52                           &ObjectAttributes,
  53                           &Iosb,
  54                           0,
  55                           0);
  56       if (!NT_SUCCESS(Status))
  57         {
  58           return(Status);
  59         }
  60     }
  61   return(STATUS_SUCCESS);
  62 }
  63
  64 VOID
  65 STDCALL
  66 InbvAcquireDisplayOwnership(VOID)
  67 {
  68 }
  69
  70
  71 BOOLEAN
  72 STDCALL
  73 InbvCheckDisplayOwnership(VOID)
  74 {
  75   return FALSE;
  76 }
  77
  78
  79 BOOLEAN
  80 STDCALL
  81 InbvDisplayString(IN PCHAR String)
  82 {
  83   return FALSE;
  84 }
  85
  86 BOOLEAN
  87 STDCALL_FUNC
  88 InbvResetDisplayParameters(ULONG SizeX, ULONG SizeY)
  89 {
  90   return(InbvResetDisplay());
  91 }
  92
  93 VOID
  94 STDCALL
  95 InbvEnableBootDriver(IN BOOLEAN Enable)
  96 {
  97   NTSTATUS Status;
  98   IO_STATUS_BLOCK Iosb;
  99
 100   Status = InbvCheckBootVid();
 101   if (!NT_SUCCESS(Status))
 102     {
 103       return;
 104     }
 105
 106   if (Enable)
 107     {
 108       Status = NtDeviceIoControlFile(BootVidDevice,
 109                                      NULL,
 110                                      NULL,
 111                                      NULL,
 112                                      &Iosb,
 113                                      IOCTL_BOOTVID_INITIALIZE,
 114                                      NULL,
 115                                      0,
 116                                      &BootVidFunctionTable,
 117                                      sizeof(BootVidFunctionTable));
 118       if (!NT_SUCCESS(Status))
 119         {
 120           KeBugCheck(0);
 121         }
 122       BootVidDriverInstalled = TRUE;
 123       /* Notify the hal we have acquired the display. */
 124       CHECKPOINT;
 125       HalAcquireDisplayOwnership(InbvResetDisplayParameters);
 126     }
 127   else
 128     {
 129       Status = NtDeviceIoControlFile(BootVidDevice,
 130                                      NULL,
 131                                      NULL,
 132                                      NULL,
 133                                      &Iosb,
 134                                      IOCTL_BOOTVID_CLEANUP,
 135                                      NULL,
 136                                      0,
 137                                      NULL,
 138                                      0);
 139       if (!NT_SUCCESS(Status))
 140         {
 141           KeBugCheck(0);
 142         }
 143       BootVidDriverInstalled = FALSE;
 144       /* Notify the hal we have released the display. */
 145       HalReleaseDisplayOwnership();
 146
 147       NtClose(BootVidDevice);
 148       BootVidDevice = NULL;
 149     }
 150 }
 151
 152 BOOLEAN
 153 STDCALL
 154 InbvEnableDisplayString(IN BOOLEAN Enable)
 155 {
 156   return FALSE;
 157 }
 158
 159
 160 VOID
 161 STDCALL
 162 InbvInstallDisplayStringFilter(IN PVOID Unknown)
 163 {
 164 }
 165
 166
 167 BOOLEAN
 168 STDCALL
 169 InbvIsBootDriverInstalled(VOID)
 170 {
 171   return(BootVidDriverInstalled);
 172 }
 173
 174
 175 VOID
 176 STDCALL
 177 InbvNotifyDisplayOwnershipLost(IN PVOID Callback)
 178 {
 179 }
 180
 181
 182 BOOLEAN
 183 STDCALL
 184 InbvResetDisplay(VOID)
 185 {
 186   if (!BootVidDriverInstalled)
 187     {
 188       return(FALSE);
 189     }
 190   return(BootVidFunctionTable.ResetDisplay());
 191 }
 192
 193
 194 VOID
 195 STDCALL
 196 InbvSetScrollRegion(IN ULONG Left,
 197   IN ULONG Top,
 198   IN ULONG Width,
 199   IN ULONG Height)
 200 {
 201 }
 202
 203
 204 VOID
 205 STDCALL
 206 InbvSetTextColor(IN ULONG Color)
 207 {
 208 }
 209
 210
 211 VOID
 212 STDCALL
 213 InbvSolidColorFill(IN ULONG Left,
 214   IN ULONG Top,
 215   IN ULONG Width,
 216   IN ULONG Height,
 217   IN ULONG Color)
 218 {
 219 }