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https://github.com/reactos/reactos.git
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136 lines
3.0 KiB
C
136 lines
3.0 KiB
C
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS kernel
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* PURPOSE: Native driver for dxg implementation
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* FILE: win32ss/reactx/dxg/main.c
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* PROGRAMER: Magnus olsen (magnus@greatlord.com)
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* REVISION HISTORY:
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* 15/10-2007 Magnus Olsen
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*/
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#include <dxg_int.h>
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#include "dxg_driver.h"
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LONG gcDummyPageRefCnt = 0;
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HSEMAPHORE ghsemDummyPage = NULL;
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VOID *gpDummyPage = NULL;
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PEPROCESS gpepSession = NULL;
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PLARGE_INTEGER gpLockShortDelay = NULL;
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DXENG_FUNCTIONS gpEngFuncs;
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const ULONG gcDxgFuncs = DXG_INDEX_DxDdIoctl + 1;
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NTSTATUS NTAPI
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DriverEntry(IN PVOID Context1,
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IN PVOID Context2)
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{
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return 0;
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}
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NTSTATUS
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APIENTRY
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DxDdStartupDxGraphics (ULONG SizeEngDrv,
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PDRVENABLEDATA pDxEngDrv,
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ULONG SizeDxgDrv,
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PDRVENABLEDATA pDxgDrv,
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PULONG DirectDrawContext,
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PEPROCESS Proc )
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{
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PDRVFN drv_func;
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PFN *peng_funcs;
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UINT i;
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/* Test see if the data is vaild we got from win32k.sys */
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if ((SizeEngDrv != sizeof(DRVENABLEDATA)) ||
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(SizeDxgDrv != sizeof(DRVENABLEDATA)))
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{
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return STATUS_BUFFER_TOO_SMALL;
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}
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/* rest static value */
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gpDummyPage = NULL;
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gcDummyPageRefCnt = 0;
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ghsemDummyPage = NULL;
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/*
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* Setup internal driver functions list we got from dxg driver functions list
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*/
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pDxgDrv->iDriverVersion = 0x80000; /* Note 12/1-2004 : DirectX 8 ? */
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pDxgDrv->c = gcDxgFuncs;
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pDxgDrv->pdrvfn = gaDxgFuncs;
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/* check how many driver functions and fail if the value does not match */
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if (pDxEngDrv->c != DXENG_INDEX_DxEngLoadImage + 1)
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{
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return STATUS_INTERNAL_ERROR;
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}
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/*
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* Check if all drv functions are sorted right
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* and if it really are exported
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*/
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peng_funcs = (PFN*)&gpEngFuncs;
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for (i = 1; i < DXENG_INDEX_DxEngLoadImage + 1; i++)
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{
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drv_func = &pDxEngDrv->pdrvfn[i];
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if ((drv_func->iFunc != i) ||
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(drv_func->pfn == NULL))
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{
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return STATUS_INTERNAL_ERROR;
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}
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peng_funcs[i] = drv_func->pfn;
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}
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/* Note 12/1-2004 : Why is this set to 0x618 */
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*DirectDrawContext = 0x618;
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if (DdHmgCreate())
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{
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ghsemDummyPage = EngCreateSemaphore();
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if (ghsemDummyPage)
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{
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gpepSession = Proc;
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return STATUS_SUCCESS;
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}
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}
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DdHmgDestroy();
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if (ghsemDummyPage)
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{
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EngDeleteSemaphore(ghsemDummyPage);
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ghsemDummyPage = 0;
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}
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return STATUS_NO_MEMORY;
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}
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NTSTATUS
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APIENTRY
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DxDdCleanupDxGraphics(VOID)
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{
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DdHmgDestroy();
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if (ghsemDummyPage != 0 )
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{
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if (gpDummyPage != 0 )
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{
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ExFreePoolWithTag(gpDummyPage,0);
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gpDummyPage = NULL;
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gcDummyPageRefCnt = 0;
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}
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EngDeleteSemaphore(ghsemDummyPage);
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ghsemDummyPage = 0;
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}
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return 0;
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}
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