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     ULONG peng_funcs;
  44     PULONG peng_func;
  45
  46     UINT 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     peng_funcs = (ULONG)&gpEngFuncs;
  79
  80     for (i=1 ; i < DXENG_INDEX_DxEngLoadImage + 1; i++)
  81     {
  82         drv_func = &pDxEngDrv->pdrvfn[i];
  83
  84         if ((drv_func->iFunc != i) ||
  85             (drv_func->pfn == NULL))
  86         {
  87             return STATUS_INTERNAL_ERROR;
  88         }
  89         peng_func = (PULONG)(peng_funcs+(i * sizeof(ULONG)));
  90         *peng_func = (ULONG)drv_func->pfn;
  91     }
  92
  93     /* Note 12/1-2004 : Why is this set to 0x618 */
  94     *DirectDrawContext = 0x618;
  95
  96     if (DdHmgCreate())
  97     {
  98         ghsemDummyPage = EngCreateSemaphore();
  99
 100         if (ghsemDummyPage)
 101         {
 102             gpepSession = Proc;
 103             return STATUS_SUCCESS;
 104         }
 105     }
 106
 107     DdHmgDestroy();
 108
 109     if (ghsemDummyPage)
 110     {
 111         EngDeleteSemaphore(ghsemDummyPage);
 112         ghsemDummyPage = 0;
 113     }
 114
 115     return STATUS_NO_MEMORY;
 116 }
 117
 118 NTSTATUS
 119 APIENTRY
 120 DxDdCleanupDxGraphics(VOID)
 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 }