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
DriverEntry(IN PVOID Context1,IN PVOID Context2)26 DriverEntry(IN PVOID Context1,
27 IN PVOID Context2)
28 {
29 return 0;
30 }
31
32 NTSTATUS
33 APIENTRY
DxDdStartupDxGraphics(ULONG SizeEngDrv,PDRVENABLEDATA pDxEngDrv,ULONG SizeDxgDrv,PDRVENABLEDATA pDxgDrv,PULONG DirectDrawContext,PEPROCESS Proc)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
DxDdCleanupDxGraphics(VOID)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