ddraw新手问题``

Question

在设定了主页面与缓冲区后台并定义了DESC后``
在装载位图时出没有任何图象出现
请问各位达人是怎么回事``

Answer 1

//注意，这个向导产生的头文件不能去掉 //给你一个例子
#include <windows.h>#include <ddraw.h>
HBITMAP hBitmap;
HDC hmdc;
HDC hdcsurf=NULL;
HINSTANCE hInstance;
DDSURFACEDESC  ddsd;
LPDIRECTDRAW            lpDD;    //DirectDraw对象
LPDIRECTDRAWSURFACE lpDDSPrimary; // 主页面
LPDIRECTDRAWSURFACE lpDDSBack;
LPDIRECTDRAWSURFACE pdds; // 缓冲页面
LPDIRECTDRAWSURFACE lpDDSBackGround;// 背景页面
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ; int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,                    PSTR szCmdLine, int iCmdShow){hBitmap=(HBITMAP)LoadImage(0,".\\ss.bmp",IMAGE_BITMAP,0,0,LR_DEFAULTSIZE|LR_LOADFROMFILE);     static TCHAR szAppName[] = TEXT ("HelloWin") ;
     HWND         hwnd ;     MSG          msg ;     WNDCLASS     wc ;      wc.style         = CS_HREDRAW | CS_VREDRAW ;     wc.lpfnWndProc   = WndProc ;     wc.cbClsExtra    = 0 ;     wc.cbWndExtra    = 0 ;     wc.hInstance     = hInstance ;     wc.hIcon         = LoadIcon (NULL, IDI_APPLICATION) ;     wc.hCursor       = LoadCursor (NULL, IDC_ARROW) ;     wc.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;     wc.lpszMenuName  = NULL ;     wc.lpszClassName = szAppName ; 
     if (!RegisterClass (&wc))     {          MessageBox (NULL, TEXT ("This program requires Windows NT!"),                       szAppName, MB_ICONERROR) ;          return 0 ;     }     hwnd = CreateWindow (szAppName,                  // window class name                          TEXT ("欢迎你的到来!"), // window caption                          WS_OVERLAPPEDWINDOW,        // window style                          CW_USEDEFAULT,              // initial x position                          CW_USEDEFAULT,              // initial y position                          CW_USEDEFAULT,              // initial x size                          CW_USEDEFAULT,              // initial y size                          NULL,                       // parent window handle                          NULL,                       // window menu handle                          hInstance,                  // program instance handle                          NULL) ;                     // creation parameters          ShowWindow (hwnd, iCmdShow) ;     UpdateWindow (hwnd) ;          while (GetMessage (&msg, NULL, 0, 0))     {          TranslateMessage (&msg) ;          DispatchMessage (&msg) ;     }     return msg.wParam ;}  LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam){    
              switch (message)     {         case WM_PAINT:
          DWORD  dwFlags;
          DDSCAPS  ddscaps;
  DirectDrawCreate(NULL, &lpDD, NULL);
dwFlags = DDSCL_EXCLUSIVE | DDSCL_FULLSCREEN;
lpDD->SetCooperativeLevel(hwnd, dwFlags);        lpDD->SetDisplayMode( 1024, 768, 16); ddsd.dwSize = sizeof( ddsd );
       ddsd.dwFlags = DDSD_CAPS | DDSD_BACKBUFFERCOUNT;
       ddsd.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE |
  DDSCAPS_FLIP |
  DDSCAPS_COMPLEX;
      ddsd.dwBackBufferCount = 1;
    lpDD->CreateSurface( &ddsd, &lpDDSPrimary, NULL );
    //创建缓冲页面
    ddscaps.dwCaps = DDSCAPS_BACKBUFFER;
    lpDDSPrimary->GetAttachedSurface(&ddscaps, &lpDDSBack);    lpDDSPrimary->GetSurfaceDesc (&ddsd);
lpDDSPrimary->GetDC(&hdcsurf);
         
     hmdc=CreateCompatibleDC(NULL);
SelectObject(hmdc,hBitmap);
BitBlt(hdcsurf,0,0,1024,768,hmdc,0,0,SRCCOPY);
 DeleteDC(hmdc);

     lpDDSPrimary->ReleaseDC(hdcsurf);
         return 0;
     case WM_KEYDOWN:
     case WM_LBUTTONDOWN:
     case WM_DESTROY:
        PostQuitMessage (0) ;
     return 0 ;     }     return DefWindowProc (hwnd, message, wParam, lParam) ;}