drivers/directx/dxg/main.c

   1
   2 /*
   3  * COPYRIGHT:        See COPYING in the top level directory
   4  * PROJECT:          ReactOS kernel
   5  * PURPOSE:          Native driver for dxg implementation
   6  * FILE:             drivers/directx/dxg/main.c
   7  * PROGRAMER:        Magnus olsen (magnus@greatlord.com)
   8  * REVISION HISTORY:
   9  *       15/10-2007   Magnus Olsen
  10  */
  11
  12
  13 #include <dxg_int.h>
  14 #include "dxg_driver.h"
  15
  16 LONG gcDummyPageRefCnt = 0;
  17 HSEMAPHORE ghsemDummyPage = NULL;
  18 VOID *gpDummyPage = NULL;
  19 PEPROCESS gpepSession = NULL;
  20 PLARGE_INTEGER gpLockShortDelay = NULL;
  21
  22
  23 PDRVFN gpEngFuncs;
  24 const ULONG gcDxgFuncs = DXG_INDEX_DxDdIoctl + 1;
  25
  26
  27
  28 NTSTATUS
  29 DriverEntry(IN PVOID Context1,
  30             IN PVOID Context2)
  31 {
  32     return 0;
  33 }
  34
  35 NTSTATUS
  36 APIENTRY
  37 DxDdStartupDxGraphics (ULONG SizeEngDrv,
  38                        PDRVENABLEDATA pDxEngDrv,
  39                        ULONG SizeDxgDrv,
  40                        PDRVENABLEDATA pDxgDrv,
  41                        PULONG DirectDrawContext,
  42                        PEPROCESS Proc )
  43 {
  44
  45     PDRVFN drv_func;
  46     INT i;
  47
  48     /* Test see if the data is vaild we got from win32k.sys */
  49     if ((SizeEngDrv != sizeof(DRVENABLEDATA)) ||
  50         (SizeDxgDrv != sizeof(DRVENABLEDATA)))
  51     {
  52         return STATUS_BUFFER_TOO_SMALL;
  53     }
  54
  55     /* rest static value */
  56     gpDummyPage = NULL;
  57     gcDummyPageRefCnt = 0;
  58     ghsemDummyPage = NULL;
  59
  60     /*
  61      * Setup internal driver functions list we got from dxg driver functions list
  62      */
  63     pDxgDrv->iDriverVersion = 0x80000; /* Note 12/1-2004 : DirectX 8 ? */
  64     pDxgDrv->c = gcDxgFuncs;
  65     pDxgDrv->pdrvfn = gaDxgFuncs;
  66
  67     /* check how many driver functions and fail if the value does not match */
  68     if (pDxEngDrv->c !=  DXENG_INDEX_DxEngLoadImage + 1)
  69     {
  70         return STATUS_INTERNAL_ERROR;
  71     }
  72
  73     /*
  74      * Check if all drv functions are sorted right
  75      * and if it really are exported
  76      */
  77
  78     for (i=1 ; i < DXENG_INDEX_DxEngLoadImage + 1; i++)
  79     {
  80         drv_func = &pDxEngDrv->pdrvfn[i];
  81
  82         if ((drv_func->iFunc != i) ||
  83             (drv_func->pfn == NULL))
  84         {
  85             return STATUS_INTERNAL_ERROR;
  86         }
  87     }
  88
  89     gpEngFuncs = pDxEngDrv->pdrvfn;
  90
  91     /* Note 12/1-2004 : Why is this set to 0x618 */
  92     *DirectDrawContext = 0x618;
  93
  94     if (DdHmgCreate())
  95     {
  96         ghsemDummyPage = EngCreateSemaphore();
  97
  98         if (ghsemDummyPage)
  99         {
 100             gpepSession = Proc;
 101             return STATUS_SUCCESS;
 102         }
 103     }
 104
 105     DdHmgDestroy();
 106
 107     if (ghsemDummyPage)
 108     {
 109         EngDeleteSemaphore(ghsemDummyPage);
 110         ghsemDummyPage = 0;
 111     }
 112
 113     return STATUS_NO_MEMORY;
 114 }
 115
 116
 117
 118
 119 NTSTATUS
 120 DxDdCleanupDxGraphics()
 121 {
 122     DdHmgDestroy();
 123
 124     if (ghsemDummyPage != 0 )
 125     {
 126         if (gpDummyPage != 0 )
 127         {
 128             ExFreePoolWithTag(gpDummyPage,0);
 129             gpDummyPage = NULL;
 130             gcDummyPageRefCnt = 0;
 131         }
 132         EngDeleteSemaphore(ghsemDummyPage);
 133         ghsemDummyPage = 0;
 134     }
 135
 136     return 0;
 137 }
 138
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