调用GetAttachedSurface不成功

2012-11-15 01:38:42 172 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

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BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)

{

   HWND hWnd;



   hInst = hInstance; // Store instance handle in our global variable



   //Modified code begin

   DDSURFACEDESC	ddsd;

   DDSCAPS			ddscaps;

   HRESULT			ddrval;

   HDC				hdc;

   char				buf[256];





   //create a window

   hWnd = CreateWindowEx(

	  WS_EX_TOPMOST, 

	  szWindowClass, 

	  szTitle,

	  WS_POPUP,

      0, 0,

	  GetSystemMetrics(SM_CXSCREEN),

	  GetSystemMetrics(SM_CXSCREEN),

	  NULL, 

	  NULL, 

	  hInstance, 

	  NULL);



   if (!hWnd)

   {

      return FALSE;

   }



   ShowWindow(hWnd, nCmdShow);

   UpdateWindow(hWnd);





   //create the main DirectDraw object

   ddrval = DirectDrawCreate(NULL, &lpDD, NULL);

   if (ddrval == DD_OK)

   {

	   //Get exclusive mode

	   ddrval = lpDD->SetCooperativeLevel(hWnd, DDSCL_EXCLUSIVE|DDSCL_FULLSCREEN);

	   if (ddrval == DD_OK)

	   {

		   ddrval = lpDD->SetDisplayMode(640, 480, 8);

		   if (ddrval == DD_OK)

		   {

			   //create the primary surface with 1 back buffer

			   ddsd.dwSize = sizeof(ddsd);

			   ddsd.dwFlags = DDSD_CAPS|DDSD_BACKBUFFERCOUNT;

			   ddsd.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE|

                                                       DDSCAPS_FLIP|DDSCAPS_COMPLEX;

			   ddsd.dwBackBufferCount = 1;

			   ddrval = lpDD->CreateSurface(&ddsd, &lpDDSPrimary, NULL);

			   if (ddrval == DD_OK)

			   {

				   //Get a pointer to the back buffer

				   ZeroMemory(&ddscaps, sizeof(DDSCAPS));

				   ddscaps.dwCaps = DDSCAPS_BACKBUFFER;

				   ddrval = lpDDSPrimary->GetAttachedSurface(&ddscaps, &lpDDSBack);

				   if (ddrval = DD_OK)

				   {

					   //draw some text

					   if (lpDDSPrimary->GetDC(&hdc) == DD_OK)

					   {

						   SetBkColor(hdc, RGB(0, 0, 255));

						   SetTextColor(hdc, RGB(255, 255, 0));

						   TextOut(hdc, 0, 0, szMsgBack, lstrlen(szMsgBack));

						   lpDDSBack->ReleaseDC(hdc);

					   }

					   //create a timer to flip the pages

					   if (SetTimer(hWnd, TIME_ID, TIMER_RATE, NULL))

					   {

						   return TRUE;

					   }

				   }

			   }



		   }

	   }

   }



   wsprintf(buf, "Direct Draw Init Failed (%08lx)\n", ddrval);

   MessageBox(hWnd, buf, "ERROR", MB_OK);

   DestroyDirectDrawObjects();

   DestroyWindow(hWnd);

   return FALSE;

   //Modified code end



}