//-----------------------------------------------
// Global data
//-----------------------------------------------
LPDIRECTDRAW4 g_pDD = NULL;
LPDIRECTDRAWSURFACE4 g_pDDSPrimary = NULL;
LPDIRECTDRAWSURFACE4 g_pDDSOffScreen = NULL;
LPDIRECTDRAWPALETTE g_pDDPal = NULL;
LPDIRECTDRAWSURFACE4 g_pDDSOne = NULL;
DWORD g_dwEraseColor;
static char *szBitmap = MAKEINTRESOURCE(IDB_BITMAP1);




HRESULT
InitDD(HWND hWnd)
{
DDSURFACEDESC2 ddsd;
HRESULT hRet;
LPDIRECTDRAW pDD;

hRet = DirectDrawCreate(NULL, &pDD, NULL);
if (hRet != DD_OK)
return InitFail(hWnd, hRet, "DirectDrawCreate FAILED");

hRet = pDD->QueryInterface(IID_IDirectDraw4, (LPVOID *) & g_pDD);
if (hRet != DD_OK)
return InitFail(hWnd, hRet, "QueryInterface FAILED");

hRet = pDD->SetCooperativeLevel(hWnd, DDSCL_EXCLUSIVE|DDSCL_FULLSCREEN);
if (hRet != DD_OK)
return InitFail(hWnd, hRet, "SetCooperativeLevel FAILED");

hRet = pDD->SetDisplayMode(640,480,SCREEN_BIT_DEPTH);
if (hRet != DD_OK)
return InitFail(hWnd, hRet, "SetDisplayMode FAILED");

ZeroMemory(&ddsd, sizeof(ddsd));
ddsd.dwSize = sizeof(ddsd);
ddsd.dwFlags = DDSD_CAPS|DDSD_BACKBUFFERCOUNT;
ddsd.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE|DDSCAPS_FLIP|DDSCAPS_COMPLEX;
ddsd.dwBackBufferCount = 1;
hRet = g_pDD->CreateSurface(&ddsd, &g_pDDSPrimary, NULL);
if (hRet != DD_OK)
return InitFail(hWnd, hRet, "CreateSurface FAILED");

DDSCAPS2 ddsc;
ddsc.dwCaps = DDSCAPS_BACKBUFFER;
hRet = g_pDDSPrimary->GetAttachedSurface(&ddsc,&g_pDDSOffScreen);
if (hRet != DD_OK)
return InitFail(hWnd,hRet,"GetAttachedSurface FAILED");

if (SCREEN_BIT_DEPTH > 8){
g_pDDPal=NULL;
}else{
g_pDDPal = DDLoadPalette(g_pDD, szBitmap);
if (g_pDDPal){
g_pDDSPrimary->SetPalette(g_pDDPal);
g_pDDPal->Release();
g_pDDPal=NULL;
}
}

g_dwEraseColor = DDColorMatch(g_pDDSPrimary,
(120<<16)
+(120<<8)
+36);

g_pDDSOne = DDLoadBitmap(g_pDD, szBitmap, 0, 0);
if (g_pDDSOne == NULL)
return InitFail(hWnd, hRet, "DDLoadBitmap FAILED");
return DD_OK;
}




HRESULT InitFail(HWND hWnd, HRESULT hRet, LPCTSTR szError,...)
{
char szBuff[128];
va_list vl;

va_start(vl, szError);
vsprintf(szBuff, szError, vl);
ReleaseDD();
MessageBox(hWnd, szBuff, TITLE, MB_OK);
DestroyWindow(hWnd);
va_end(vl);
return hRet;
}