* Create a branch for USB experiments.

svn path=/branches/usb-experiments/; revision=72629
2025-07-31 18:22:35 +00:00 · 2016-09-09 15:11:19 +00:00 · 2016-09-09 15:11:19 +00:00 · 0ee830d7a4
commit 0ee830d7a4
parent 28d8ba0d3e
23049 changed files with 0 additions and 1313991 deletions
--- a/win32ss/reactx/dxg/main.c
+++ b/win32ss/reactx/dxg/main.c
@ -0,0 +1,131 @@
+/*
+ * COPYRIGHT:        See COPYING in the top level directory
+ * PROJECT:          ReactOS kernel
+ * PURPOSE:          Native driver for dxg implementation
+ * FILE:             win32ss/reactx/dxg/main.c
+ * PROGRAMER:        Magnus olsen (magnus@greatlord.com)
+ * REVISION HISTORY:
+ *       15/10-2007   Magnus Olsen
+ */
+
+#include <dxg_int.h>
+#include "dxg_driver.h"
+
+LONG gcDummyPageRefCnt = 0;
+HSEMAPHORE ghsemDummyPage = NULL;
+VOID *gpDummyPage = NULL;
+PEPROCESS gpepSession = NULL;
+PLARGE_INTEGER gpLockShortDelay = NULL;
+
+PDRVFN gpEngFuncs;
+const ULONG gcDxgFuncs = DXG_INDEX_DxDdIoctl + 1;
+
+
+NTSTATUS NTAPI
+DriverEntry(IN PVOID Context1,
+            IN PVOID Context2)
+{
+    return 0;
+}
+
+NTSTATUS
+APIENTRY
+DxDdStartupDxGraphics (ULONG SizeEngDrv,
+                       PDRVENABLEDATA pDxEngDrv,
+                       ULONG SizeDxgDrv,
+                       PDRVENABLEDATA pDxgDrv,
+                       PULONG DirectDrawContext,
+                       PEPROCESS Proc )
+{
+
+    PDRVFN drv_func;
+    UINT i;
+
+    /* Test see if the data is vaild we got from win32k.sys */
+    if ((SizeEngDrv != sizeof(DRVENABLEDATA)) ||
+        (SizeDxgDrv != sizeof(DRVENABLEDATA)))
+    {
+        return STATUS_BUFFER_TOO_SMALL;
+    }
+
+    /* rest static value */
+    gpDummyPage = NULL;
+    gcDummyPageRefCnt = 0;
+    ghsemDummyPage = NULL;
+
+    /*
+     * Setup internal driver functions list we got from dxg driver functions list
+     */
+    pDxgDrv->iDriverVersion = 0x80000; /* Note 12/1-2004 : DirectX 8 ? */
+    pDxgDrv->c = gcDxgFuncs;
+    pDxgDrv->pdrvfn = gaDxgFuncs;
+
+    /* check how many driver functions and fail if the value does not match */
+    if (pDxEngDrv->c !=  DXENG_INDEX_DxEngLoadImage + 1)
+    {
+        return STATUS_INTERNAL_ERROR;
+    }
+
+    /*
+     * Check if all drv functions are sorted right
+     * and if it really are exported
+     */
+
+    for (i=1 ; i < DXENG_INDEX_DxEngLoadImage + 1; i++)
+    {
+        drv_func = &pDxEngDrv->pdrvfn[i];
+
+        if ((drv_func->iFunc != i) ||
+            (drv_func->pfn == NULL))
+        {
+            return STATUS_INTERNAL_ERROR;
+        }
+    }
+
+    gpEngFuncs = pDxEngDrv->pdrvfn;
+
+    /* Note 12/1-2004 : Why is this set to 0x618 */
+    *DirectDrawContext = 0x618;
+
+    if (DdHmgCreate())
+    {
+        ghsemDummyPage = EngCreateSemaphore();
+
+        if (ghsemDummyPage)
+        {
+            gpepSession = Proc;
+            return STATUS_SUCCESS;
+        }
+    }
+
+    DdHmgDestroy();
+
+    if (ghsemDummyPage)
+    {
+        EngDeleteSemaphore(ghsemDummyPage);
+        ghsemDummyPage = 0;
+    }
+
+    return STATUS_NO_MEMORY;
+}
+
+NTSTATUS
+APIENTRY
+DxDdCleanupDxGraphics(VOID)
+{
+    DdHmgDestroy();
+
+    if (ghsemDummyPage != 0 )
+    {
+        if (gpDummyPage != 0 )
+        {
+            ExFreePoolWithTag(gpDummyPage,0);
+            gpDummyPage = NULL;
+            gcDummyPageRefCnt = 0;
+        }
+        EngDeleteSemaphore(ghsemDummyPage);
+        ghsemDummyPage = 0;
+    }
+
+    return 0;
+}