Getting Started: Why won't this work

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GameProgrammer.Com: Getting Started: Why won't this work
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By Ronny Althenn on Saturday, July 8, 2000 - 09:27 pm:

When I compile this, I get an error saying that
it cannot convert a DDSURFACEDESC2 struct to
a DDSURFACEDESC struct. I'm using the IDirectDraw4 interface
as described in hour 2 of "SAMS Teach Yourself DirectX 7 in
24 Hours" by Robert Dunlop, Dale Shepherd and Mark Martin,
as well as in Chapter 6 of "Tricks of the Windows Game
Programming Gurus" by André LaMothe.

I just got through figuring out I had to add dxguid.dll to
my project to get a different error involving
IID_IDirectDraw4 being an unresolved external symbol, and
now I get this. GRRRR!

I know  is in my include path, and I set the SDK's version
ahead of VC's version, since it's the newer version. Somehow
I think I'm still getting the older version included.

Here's the code that's giving me trouble:
--------



#include
#define INITGUID
#include

#define KEYDOWN(vk_code)	((GetAsyncKeyState(vk_code) &
0x8000) ? 1:0)

extern HINSTANCE hinstance_app;
extern HWND main_window_handle;
LPDIRECTDRAW lpdd4 = NULL;
LPDIRECTDRAWSURFACE4 lpddsprimary = NULL;
DDSURFACEDESC2 ddsd;

int Game_Init(void *parms=NULL, int num_parms=0)
{
	PALETTEENTRY palette[256];
	LPDIRECTDRAW lpdd = NULL;
	LPDIRECTDRAWPALETTE lpddpal = NULL;

	/* setup DirectDraw */
  if (FAILED(DirectDrawCreate(NULL, &lpdd, NULL)))
		return(0);

	if (FAILED(lpdd->QueryInterface(IID_IDirectDraw4, (LPVOID*)
&lpdd4)))
		return(0);

	lpdd->Release();
	lpdd = NULL;

	if (FAILED(lpdd4->SetCooperativeLevel(main_window_handle,
DDSCL_FULLSCREEN |
			DDSCL_ALLOWMODEX | DDSCL_EXCLUSIVE | DDSCL_ALLOWREBOOT)))
		return(0);

	/* create palette */

	for (int color=0; colorCreatePalette(DDPCAPS_8BIT |
DDPCAPS_ALLOW256 |
			DDPCAPS_INITIALIZE, palette, &lpddpal, NULL)))
	{
		return(0);
	}

	/* create surface */

	ddsd.dwSize = sizeof(DDSURFACEDESC2);
	ddsd.dwFlags = DDSD_CAPS;
	ddsd.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE;

	if (FAILED(lpdd4->CreateSurface(&ddsd, &lpddsprimary,
NULL)))
	{
		return(0);
	}

	if (FAILED(lpddsprimary->SetPalette(lpddpal)))
	{
		return(0);
	}

	return(1);
}

int Game_Main(void *parms=NULL, int num_parms=0)
{
	int mempitch;
	UCHAR* screen;
	int i;
	int x;
	int y;
	UCHAR color;

	if (KEYDOWN(VK_ESCAPE))
		SendMessage(main_window_handle, WM_CLOSE, 0, 0);

	memset(&ddsd, 0, sizeof(ddsd));

	ddsd.dwSize = sizeof(ddsd);

	if (FAILED(lpddsprimary->Lock(NULL, &ddsd,
DDLOCK_SURFACEMEMORYPTR | DDLOCK_WAIT,
			NULL)))
	{
		return(0);
	}

	mempitch = (int) ddsd.lPitch;
	screen = (UCHAR*) ddsd.lpSurface;

	for (i = 0; iUnlock(NULL);

	return(1);
}

int Game_Shutdown(void *parms=NULL, int num_parms=0)
{
	if (lpdd4)
	{
		lpdd4->Release();
		lpdd4 = NULL;
	}

	return(1);
}


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Any help would be appreciated. Thanks.

BTW, I tried really hard to get this message as accurate as
possible. The preview is showing curly brackets ( { and
} ) as { and }. Hopefully when I post it will
look normal.

- Neisayer

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