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 LPDIRECT3D9_INT impl_from_IDirect3D9(LPDIRECT3D9 iface)
  18 {
  19     return (LPDIRECT3D9_INT)((ULONG_PTR)iface - FIELD_OFFSET(DIRECT3D9_INT, lpVtbl));
  20 }
  21
  22 BOOL ReadRegistryValue(IN DWORD ValueType, IN LPCSTR ValueName, OUT LPBYTE DataBuffer, IN OUT LPDWORD DataBufferSize)
  23 {
  24     HKEY hKey;
  25     DWORD Type;
  26     LONG Ret;
  27
  28     if (ERROR_SUCCESS != RegOpenKeyEx(HKEY_LOCAL_MACHINE, D3dDebugRegPath, 0, KEY_QUERY_VALUE, &hKey))
  29         return FALSE;
  30
  31     Ret = RegQueryValueEx(hKey, ValueName, 0, &Type, DataBuffer, DataBufferSize);
  32
  33     RegCloseKey(hKey);
  34
  35     if (ERROR_SUCCESS != Ret)
  36         return FALSE;
  37
  38     if (Type != ValueType)
  39         return FALSE;
  40
  41     return TRUE;
  42 }
  43
  44 HRESULT FormatDebugString(IN OUT LPSTR Buffer, IN LONG BufferSize, IN LPCSTR FormatString, ... )
  45 {
  46     int BytesWritten;
  47     va_list vargs;
  48
  49     if (BufferSize == 0)
  50         return DDERR_INVALIDPARAMS;
  51
  52     va_start(vargs, FormatString);
  53     BytesWritten = _vsnprintf(Buffer, BufferSize-1, FormatString, vargs);
  54
  55     if (BytesWritten < BufferSize)
  56         return DDERR_GENERIC;
  57
  58     Buffer[BufferSize-1] = '\0';
  59
  60     return 0;
  61 }
  62
  63 HRESULT CreateD3D9(OUT LPDIRECT3D9 *ppDirect3D9)
  64 {
  65     LPDIRECT3D9_INT pDirect3D9;
  66
  67     if (ppDirect3D9 == 0)
  68         return DDERR_INVALIDPARAMS;
  69
  70     pDirect3D9 = HeapAlloc(GetProcessHeap(), 0, sizeof(DIRECT3D9_INT));
  71
  72     if (0 == pDirect3D9)
  73         return DDERR_OUTOFMEMORY;
  74
  75     pDirect3D9->unknown000007 = 0;
  76     pDirect3D9->lpInt = 0;
  77
  78     pDirect3D9->lpVtbl = &Direct3D9_Vtbl;
  79     pDirect3D9->dwProcessId = GetCurrentThreadId();
  80     pDirect3D9->dwRefCnt = 1;
  81
  82     pDirect3D9->unknown004576 = 0;
  83     pDirect3D9->unknown004578 = 0;
  84     pDirect3D9->unknown004579 = 0;
  85     pDirect3D9->unknown004580 = 0;
  86     pDirect3D9->unknown004581 = 0;
  87     pDirect3D9->unknown004582 = 0;
  88     pDirect3D9->unknown004583 = 0;
  89     pDirect3D9->unknown004589 = 0;
  90
  91     pDirect3D9->lpInt = pDirect3D9;
  92
  93     *ppDirect3D9 = (LPDIRECT3D9)&pDirect3D9->lpVtbl;
  94
  95     return ERROR_SUCCESS;
  96 }