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:             drivers/directx/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 PDRVFN gpEngFuncs;
  21 const ULONG gcDxgFuncs = DXG_INDEX_DxDdIoctl + 1;
  22
  23
  24 NTSTATUS NTAPI
  25 DriverEntry(IN PVOID Context1,
  26             IN PVOID Context2)
  27 {
  28     return 0;
  29 }
  30
  31 NTSTATUS
  32 APIENTRY
  33 DxDdStartupDxGraphics (ULONG SizeEngDrv,
  34                        PDRVENABLEDATA pDxEngDrv,
  35                        ULONG SizeDxgDrv,
  36                        PDRVENABLEDATA pDxgDrv,
  37                        PULONG DirectDrawContext,
  38                        PEPROCESS Proc )
  39 {
  40
  41     PDRVFN drv_func;
  42     UINT i;
  43
  44     /* Test see if the data is vaild we got from win32k.sys */
  45     if ((SizeEngDrv != sizeof(DRVENABLEDATA)) ||
  46         (SizeDxgDrv != sizeof(DRVENABLEDATA)))
  47     {
  48         return STATUS_BUFFER_TOO_SMALL;
  49     }
  50
  51     /* rest static value */
  52     gpDummyPage = NULL;
  53     gcDummyPageRefCnt = 0;
  54     ghsemDummyPage = NULL;
  55
  56     /*
  57      * Setup internal driver functions list we got from dxg driver functions list
  58      */
  59     pDxgDrv->iDriverVersion = 0x80000; /* Note 12/1-2004 : DirectX 8 ? */
  60     pDxgDrv->c = gcDxgFuncs;
  61     pDxgDrv->pdrvfn = gaDxgFuncs;
  62
  63     /* check how many driver functions and fail if the value does not match */
  64     if (pDxEngDrv->c !=  DXENG_INDEX_DxEngLoadImage + 1)
  65     {
  66         return STATUS_INTERNAL_ERROR;
  67     }
  68
  69     /*
  70      * Check if all drv functions are sorted right
  71      * and if it really are exported
  72      */
  73
  74     for (i=1 ; i < DXENG_INDEX_DxEngLoadImage + 1; i++)
  75     {
  76         drv_func = &pDxEngDrv->pdrvfn[i];
  77
  78         if ((drv_func->iFunc != i) ||
  79             (drv_func->pfn == NULL))
  80         {
  81             return STATUS_INTERNAL_ERROR;
  82         }
  83     }
  84
  85     gpEngFuncs = pDxEngDrv->pdrvfn;
  86
  87     /* Note 12/1-2004 : Why is this set to 0x618 */
  88     *DirectDrawContext = 0x618;
  89
  90     if (DdHmgCreate())
  91     {
  92         ghsemDummyPage = EngCreateSemaphore();
  93
  94         if (ghsemDummyPage)
  95         {
  96             gpepSession = Proc;
  97             return STATUS_SUCCESS;
  98         }
  99     }
 100
 101     DdHmgDestroy();
 102
 103     if (ghsemDummyPage)
 104     {
 105         EngDeleteSemaphore(ghsemDummyPage);
 106         ghsemDummyPage = 0;
 107     }
 108
 109     return STATUS_NO_MEMORY;
 110 }
 111
 112 NTSTATUS
 113 APIENTRY
 114 DxDdCleanupDxGraphics(VOID)
 115 {
 116     DdHmgDestroy();
 117
 118     if (ghsemDummyPage != 0 )
 119     {
 120         if (gpDummyPage != 0 )
 121         {
 122             ExFreePoolWithTag(gpDummyPage,0);
 123             gpDummyPage = NULL;
 124             gcDummyPageRefCnt = 0;
 125         }
 126         EngDeleteSemaphore(ghsemDummyPage);
 127         ghsemDummyPage = 0;
 128     }
 129
 130     return 0;
 131 }