xref: /reactos/win32ss/reactx/dxg/main.c (revision e5873161) 
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 }
136