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楼主 |
发表于 2004-4-11 20:57:00
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Re:关于Flip（）用法的问题(附我的源程序）
LPDIRECTDRAW7 pDD7; //声明DirectDraw对象
LPDIRECTDRAWSURFACE7 pPSur; //声明主绘图页
LPDIRECTDRAWSURFACE7 pBBuf; //声明后缓冲区
LPDIRECTDRAWSURFACE7 pOPla; //声明幕后内存区
DDSCAPS2 caps; //声明DDSCAPS结构
DDSURFACEDESC2 desc; //声明描述结构
HRESULT result; //声明HRESULT类型变量
canvasFrame::canvasFrame()
{
Create(NULL,"绘图窗口",WS_POPUP); //建立窗口
hdc = ::CreateCompatibleDC(NULL);
bmp1 = (HBITMAP): oadImage(NULL,"back1.bmp",IMAGE_BITMAP,640,480,LR_LOADFROMFILE);
bmp2 = (HBITMAP)::LoadImage(NULL,"back2.bmp",IMAGE_BITMAP,640,480,LR_LOADFROMFILE);
::SelectObject(hdc,bmp1); //选择第一张位图
LoadBmp();
pPSur->BltFast(0,0,pOPla,CRect(0,0,640,480),DDBLTFAST_WAIT);
::SelectObject(hdc,bmp2); //选择第二张位图
LoadBmp();
pBBuf->BltFast(0,0,pOPla,CRect(0,0,640,480),DDBLTFAST_WAIT);
}
int canvasFrame::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
if (CFrameWnd::OnCreate(lpCreateStruct) == -1)
return -1;
result = DirectDrawCreateEx(NULL, (VOID**)&pDD7, IID_IDirectDraw7, NULL);
//建立DirectDraw对象
if (result != DD_OK)
MessageBox("建立DirectDraw对象失败!");
result = pDD7->SetCooperativeLevel(m_hWnd,DDSCL_EXCLUSIVE |
DDSCL_FULLSCREEN|DDSCL_ALLOWREBOOT );
//设定协调层级
if(result !=DD_OK)
MessageBox("设定程序协调层级失败!");
result = pDD7->SetDisplayMode(640,480,16,0,DDSDM_STANDARDVGAMODE); //设定屏幕显示模式
//设定显示模式
if(result !=DD_OK)
MessageBox("设定屏幕显示模式失败!");
memset(&desc,0,sizeof(desc));
desc.dwSize = sizeof(desc);
desc.dwFlags = DDSD_CAPS | DDSD_BACKBUFFERCOUNT;
desc.dwBackBufferCount = 1;
desc.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE | DDSCAPS_COMPLEX | DDSCAPS_FLIP;
result = pDD7->CreateSurface(&desc,&pPSur,NULL);
//建立主绘图页
if(result !=DD_OK)
MessageBox("建立主绘图页失败!");
caps.dwCaps = DDSCAPS_BACKBUFFER;
result = pPSur->GetAttachedSurface(&caps,&pBBuf);
//连结后缓冲区
if(result !=DD_OK)
MessageBox("连接后缓冲区失败!");
memset(&desc,0,sizeof(desc));
desc.dwSize = sizeof(desc);
desc.dwFlags = DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH;
desc.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN ;
desc.dwWidth = 640;
desc.dwHeight = 480;
result = pDD7->CreateSurface(&desc, &pOPla, NULL);
//建立幕后内存区
if(result !=DD_OK)
MessageBox("建立幕后内存区失败!");
SetTimer(1,500,NULL);
return 0;
}
void canvasFrame::OnChar(UINT nChar, UINT nRepCnt, UINT nFlags)
{
CFrameWnd::OnChar(nChar, nRepCnt, nFlags);
if( nChar== VK_ESCAPE ) //判断是否按下 Esc 键
PostMessage(WM_CLOSE ); //传送WM_CLOSE信息
}
void canvasFrame::OnTimer(UINT nIDEvent)
{
CFrameWnd::OnTimer(nIDEvent);
pPSur->Flip( NULL , DDFLIP_WAIT ); //翻页
}
void canvasFrame::LoadBmp()
{
result = pOPla->GetDC(&hdc1); //取得DC
if(result !=DD_OK)
MessageBox("取得内存区 DC 失败!");
::BitBlt(hdc1,0,0,desc.dwWidth,desc.dwHeight,hdc,0,0,SRCCOPY);
pOPla->ReleaseDC(hdc1); //释放DC
}
canvasFrame::~canvasFrame()
{
delete hdc;
delete hdc1;
delete bmp1;
delete bmp2;
pDD7->Release();
pPSur->Release();
pOPla->Release();
} |
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发表于 2004-4-11 12:26:00
发表于 2004-4-11 17:33:00
