win32ss/reactx/dxg/main.c

   1 /*
   2  * COPYRIGHT:        See COPYING in the top level directory
   3  * PROJECT:          ReactOS kernel
   4  * PURPOSE:          Native driver for dxg implementation
   5  * FILE:             win32ss/reactx/dxg/main.c
   6  * PROGRAMER:        Magnus olsen (magnus@greatlord.com)
   7  * REVISION HISTORY:
   8  *       15/10-2007   Magnus Olsen
   9  */
  10
  11 #include <dxg_int.h>
  12 #include "dxg_driver.h"
  13
  14 LONG gcDummyPageRefCnt = 0;
  15 HSEMAPHORE ghsemDummyPage = NULL;
  16 VOID *gpDummyPage = NULL;
  17 PEPROCESS gpepSession = NULL;
  18 PLARGE_INTEGER gpLockShortDelay = NULL;
  19
  20 DXENG_FUNCTIONS gpEngFuncs;
  21
  22 const ULONG gcDxgFuncs = DXG_INDEX_DxDdIoctl + 1;
  23
  24
  25 NTSTATUS NTAPI
  26 DriverEntry(IN PVOID Context1,
  27             IN PVOID Context2)
  28 {
  29     return 0;
  30 }
  31
  32 NTSTATUS
  33 APIENTRY
  34 DxDdStartupDxGraphics (ULONG SizeEngDrv,
  35                        PDRVENABLEDATA pDxEngDrv,
  36                        ULONG SizeDxgDrv,
  37                        PDRVENABLEDATA pDxgDrv,
  38                        PULONG DirectDrawContext,
  39                        PEPROCESS Proc )
  40 {
  41
  42     PDRVFN drv_func;
  43     PFN *peng_funcs;
  44     UINT i;
  45
  46     /* Test see if the data is vaild we got from win32k.sys */
  47     if ((SizeEngDrv != sizeof(DRVENABLEDATA)) ||
  48         (SizeDxgDrv != sizeof(DRVENABLEDATA)))
  49     {
  50         return STATUS_BUFFER_TOO_SMALL;
  51     }
  52
  53     /* rest static value */
  54     gpDummyPage = NULL;
  55     gcDummyPageRefCnt = 0;
  56     ghsemDummyPage = NULL;
  57
  58     /*
  59      * Setup internal driver functions list we got from dxg driver functions list
  60      */
  61     pDxgDrv->iDriverVersion = 0x80000; /* Note 12/1-2004 : DirectX 8 ? */
  62     pDxgDrv->c = gcDxgFuncs;
  63     pDxgDrv->pdrvfn = gaDxgFuncs;
  64
  65     /* check how many driver functions and fail if the value does not match */
  66     if (pDxEngDrv->c !=  DXENG_INDEX_DxEngLoadImage + 1)
  67     {
  68         return STATUS_INTERNAL_ERROR;
  69     }
  70
  71     /*
  72      * Check if all drv functions are sorted right
  73      * and if it really are exported
  74      */
  75
  76     peng_funcs = (PFN*)&gpEngFuncs;
  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         peng_funcs[i] = drv_func->pfn;
  89     }
  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 NTSTATUS
 117 APIENTRY
 118 DxDdCleanupDxGraphics(VOID)
 119 {
 120     DdHmgDestroy();
 121
 122     if (ghsemDummyPage != 0 )
 123     {
 124         if (gpDummyPage != 0 )
 125         {
 126             ExFreePoolWithTag(gpDummyPage,0);
 127             gpDummyPage = NULL;
 128             gcDummyPageRefCnt = 0;
 129         }
 130         EngDeleteSemaphore(ghsemDummyPage);
 131         ghsemDummyPage = 0;
 132     }
 133
 134     return 0;
 135 }