reactos/dll/directx/d3d9/d3d9_helpers.c

   1 /*
   2  * COPYRIGHT:       See COPYING in the top level directory
   3  * PROJECT:         ReactOS ReactX
   4  * FILE:            dll/directx/d3d9/d3d9_helpers.c
   5  * PURPOSE:         d3d9.dll helper functions
   6  * PROGRAMERS:      Gregor Brunmar <gregor (dot) brunmar (at) home (dot) se>
   7  */
   8
   9 #include "d3d9_helpers.h"
  10 #include <stdio.h>
  11 #include <ddraw.h>
  12
  13 #include "d3d9_private.h"
  14
  15 static LPCSTR D3dDebugRegPath = "Software\\Microsoft\\Direct3D";
  16
  17
  18 BOOL ReadRegistryValue(IN DWORD ValueType, IN LPCSTR ValueName, OUT LPBYTE DataBuffer, IN OUT LPDWORD DataBufferSize)
  19 {
  20     HKEY hKey;
  21     DWORD Type;
  22     LONG Ret;
  23
  24     if (ERROR_SUCCESS != RegOpenKeyEx(HKEY_LOCAL_MACHINE, D3dDebugRegPath, 0, KEY_QUERY_VALUE, &hKey))
  25         return FALSE;
  26
  27     Ret = RegQueryValueEx(hKey, ValueName, 0, &Type, DataBuffer, DataBufferSize);
  28
  29     RegCloseKey(hKey);
  30
  31     if (ERROR_SUCCESS != Ret)
  32         return FALSE;
  33
  34     if (Type != ValueType)
  35         return FALSE;
  36
  37     return TRUE;
  38 }
  39
  40 HRESULT FormatDebugString(IN OUT LPSTR Buffer, IN LONG BufferSize, IN LPCSTR FormatString, ... )
  41 {
  42     int BytesWritten;
  43     va_list vargs;
  44
  45     if (BufferSize == 0)
  46         return DDERR_INVALIDPARAMS;
  47
  48     va_start(vargs, FormatString);
  49     BytesWritten = _vsnprintf(Buffer, BufferSize-1, FormatString, vargs);
  50
  51     if (BytesWritten < BufferSize)
  52         return DDERR_GENERIC;
  53
  54     Buffer[BufferSize-1] = '\0';
  55
  56     return 0;
  57 }
  58
  59 HRESULT CreateD3D9(OUT LPDIRECT3D9 *ppDirect3D9)
  60 {
  61     LPDIRECTD3D9_INT pDirect3D9;
  62
  63     if (ppDirect3D9 == 0)
  64         return DDERR_INVALIDPARAMS;
  65
  66     pDirect3D9 = HeapAlloc(GetProcessHeap(), 0, sizeof(DIRECTD3D9_INT));
  67
  68     if (0 == pDirect3D9)
  69         return DDERR_OUTOFMEMORY;
  70
  71     pDirect3D9->unknown000007 = 0;
  72     pDirect3D9->lpInt = 0;
  73
  74     pDirect3D9->lpVtbl = &Direct3D9_Vtbl;
  75     pDirect3D9->dwProcessId = GetCurrentThreadId();
  76     pDirect3D9->dwRefCnt = 1;
  77
  78     *ppDirect3D9 = (IDirect3D9*)pDirect3D9;
  79
  80     return ERROR_SUCCESS;
  81 }