VC++实现输出GIF到窗体并显示GIF动画的方法

//加载GIF文件void COutputGIFDlg::OnBrowse(){ CFileDialog flDlg(TRUE, "", "", OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT,   "GIF|*.gif;||");//定义文件打开对话框 if (flDlg.DoModal() == IDOK) { CString szText; szText = flDlg.GetPathName(); m_FileName.SetWindowText(szText); m_pBmp = Bitmap::FromFile(szText.AllocSysString()); //加载GIF图像 szText.ReleaseBuffer(); m_nCount = m_pBmp->GetFrameDimensionsCount(); //获取帧维数 GUID *pGuids = new GUID[m_nCount]; //定义一个GUID数组 m_pBmp->GetFrameDimensionsList(pGuids,m_nCount); //获取图像帧的GUID m_FrameCount = m_pBmp->GetFrameCount(pGuids); //获取GIF帧数 UINT nSize; //定义一个整型变量 m_nCount = 0; //初始化成员变量 m_pBmp->GetPropertySize(&nSize, &m_nDelay); //获取属性大小 PropertyItem *pItem = NULL; //定义属性指针 pItem = (PropertyItem*)malloc(nSize); //为属性指针分配合适的空间 m_pBmp->GetAllPropertyItems(nSize, m_nDelay, pItem);//获取属性信息 m_nDelay = ((long*)pItem->value)[0]; //获取第一帧的延时 free(pItem); //释放属性对象 delete [] pGuids; //释放GUID m_nIndex = 0; //初始化成员变量 KillTimer(1); SetTimer(1, 300, NULL); }}void COutputGIFDlg::OnTimer(UINT nIDEvent){ GUID Guid = FrameDimensionTime; //定义一个GUID CDC* pDC = GetDC(); //获取窗口的设备上下文 //定义一个内存画布 CMemDC dc(pDC, CRect(20, 50, m_pBmp->GetWidth()+20, m_pBmp->GetHeight()+50)); Graphics gh(dc.m_hDC); //定义一个图像对象 //向设备上下文中绘制图像 gh.DrawImage(m_pBmp, 0, 0, m_pBmp->GetWidth(), m_pBmp->GetHeight()); m_pBmp->SelectActiveFrame(&Guid, m_nIndex++);//设置下一帧 if(m_nIndex == m_FrameCount) //判断当前帧是否为尾帧  m_nIndex = 0; //将当前帧设置为第一帧 CDialog::OnTimer(nIDEvent);}void COutputGIFDlg::OnCancel(){ if (m_pBmp != NULL) { delete m_pBmp; m_pBmp = NULL; } CDialog::OnCancel();}