ddraw杂载入位图

beijie

int game_main()
{
lpback->GetSurfaceDesc(&ddsd);
lpback->Lock(NULL,&ddsd,DDLOCK_WAIT|DDLOCK_SURFACEMEMORYPTR, NULL);
RECT rect;
rect.left=0;rect.top=0,rect.right=256,rect.bottom=256;
lpback->BltFast(0,0,lpDDopl,&rect,DDBLTFAST_WAIT);
lpback->Unlock(NULL);
lpprimary->Flip(NULL,DDFLIP_WAIT);
Sleep(1000);
if(KEYDOWN(VK_ESCAPE))
SendMessage(main_window_handle,WM_CLOSE,0,0);
return(1);
}

int game_init()
{

if (FAILED(DirectDrawCreateEx(NULL, (void **)&lpd7, IID_IDirectDraw7, NULL)))
   return(0);
lpd7->SetCooperativeLevel(main_window_handle,DDSCL_FULLSCREEN|DDSCL_EXCLUSIVE|DDSCL_ALLOWMODEX|DDSCL_ALLOWREBOOT);
lpd7->SetDisplayMode(width,hight,8,0,0);
DDSURFACEDESC2 ddsd;
memset(&ddsd,0,sizeof(ddsd));
ddsd.dwSize=sizeof(ddsd);
ddsd.dwFlags=DDSD_CAPS|DDSD_BACKBUFFERCOUNT;
ddsd.ddsCaps.dwCaps=DDSCAPS_PRIMARYSURFACE | DDSCAPS_COMPLEX | DDSCAPS_FLIP;
ddsd.dwBackBufferCount = 1;
if(FAILED(lpd7->CreateSurface(&ddsd,&lpprimary,NULL)))
return 0;
ddsd.ddsCaps.dwCaps = DDSCAPS_BACKBUFFER;
if (FAILED(lpprimary->GetAttachedSurface(&ddsd.ddsCaps, &lpback)))
return(0);
memset(&ddsd,0,sizeof(ddsd));
ddsd.dwSize=sizeof(ddsd);
ddsd.dwFlags = DDSD_CAPS |DDSD_HEIGHT|DDSD_WIDTH;
ddsd.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN;
ddsd.dwWidth=256;
ddsd.dwHeight=256;
if (FAILED(lpd7->CreateSurface(&ddsd, &lpDDopl, NULL)))
   return(0);
HBITMAP bitmap; //声明HBITMAP对象
hdc=::CreateCompatibleDC(NULL);
bitmap=(HBITMAP):oadImage(NULL,"Grass.bmp",IMAGE_BITMAP,256,256,LR_LOADFROMFILE);
if(bitmap==NULL)
return(0);
::SelectObject(hdc,bitmap);
HRESULT result;
lpDDopl->GetSurfaceDesc(&ddsd);
result= lpDDopl->GetDC(&hdc1);
if(result!=DD_OK)
return 0;
::BitBlt(hdc1,0,0,ddsd.dwWidth,ddsd.dwHeight,hdc,0,0,SRCCOPY);
lpDDopl->ReleaseDC(hdc1);
::ReleaseDC(NULL,hdc);
return 1;
}
int WINAPI WinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPSTR     lpCmdLine,
                     int       nCmdShow)
{
                ::RegisterClassEx(&wndclass);
        HWND hwnd=::CreateWindowEx(L);
        if(hwnd==NULL)
        {
                ::MessageBox(NULL,"error","errror",MB_OK);
                return -1;
        }
        main_window_handle=hwnd;
        game_init();
        while(true)
        {        if(PeekMessage(&msg,NULL,0,0,PM_REMOVE))
                {
                                }
                game_main();
        }

        game_shutdown();
        return msg.wParam;
}

请问下为什么图像显不出来啊，谢谢了。

beijie

请大家帮忙指正一下嘛

minji

别lock

beijie

谢了，能显示了。是什么原因不能LOCK？

minji

我只知道lock是用来自己操作页面内容的

beijie

哦，知道了。非常感谢。

redhu

when you operate the video buffer by yourself, you should lock it......However, you use HDC to resolve this, so you don't need it!

weixiaobao_686

在DX中用GDI，会有自己的锁定机制。不需要DX的锁定。
游戏编程大师上讲了的