求一个TransparentBlt函数的实例

[ohmygol]

邮箱[e-mail]

[LICHUNLI1022]

CWnd *pWnd;
	CDC *pDC;
	BITMAP bmPerson,bmBackground;
	pWnd=GetDlgItem(IDC_STATIC_SCENE);
	pDC=pWnd->GetDC();	

	if(!(m_bmpPerson.LoadBitmap(IDB_BITMAP_PERSON)&&m_bmpBK.LoadBitmap(IDB_BITMAP_SCENE)))  //加载图片
	{
		AfxMessageBox(L"Can not load the 2 pictures correctly!");
		return ;
	}
	m_bmpPerson.GetObject(sizeof(bmPerson),&bmPerson);
	m_bmpBK.GetObject(sizeof(bmBackground),&bmBackground);
    dcPersonMask.CreateCompatibleDC(pDC) ;//生成CDC对象，创建与显示设备上下文兼容的内存设备上下文CDC对象
	dcBK.CreateCompatibleDC(pDC);
	dcPerson.CreateCompatibleDC(pDC);

	m_PersonMaskBitmap.CreateBitmap(bmPerson.bmWidth,bmPerson.bmHeight,1,1,NULL);
	CBitmap* OldPersonMaskBitmap = dcPersonMask.SelectObject(&m_PersonMaskBitmap);
	
	CBitmap *oldPerson=dcPerson.SelectObject(&m_bmpPerson);//将位图对象选入创建的内存设备上下文
	CBitmap *oldbackground=dcBK.SelectObject(&m_bmpBK);

	COLORREF l_crOldBack=dcPerson.SetBkColor(RGB(0,0,0));
	dcPersonMask.StretchBlt(0,0,bmPerson.bmWidth,bmPerson.bmHeight,&dcPerson,0,0,bmPerson.bmWidth,bmPerson.bmHeight,SRCCOPY);
	dcPerson.SetBkColor(l_crOldBack);

	dcBK.MaskBlt(x1,y1,bmPerson.bmWidth,bmPerson.bmHeight,&dcPerson,0,0,m_PersonMaskBitmap,0,0,ROP4_TRANSPARENTBLIT );
	//显示图片
	//pDC->StretchBlt(0,0,bmBackground.bmWidth,bmBackground.bmHeight,&dcBK,0,0,bmBackground.bmWidth,bmBackground.bmHeight,SRCCOPY);
	pDC->TransparentBlt(0,0,bmBackground.bmWidth,bmBackground.bmHeight,&dcBK,0,0,bmBackground.bmWidth,bmBackground.bmHeight,RGB(255,255,255));

[LICHUNLI1022]

CWnd *pWnd;
	CDC *pDC;
	BITMAP bmPerson,bmBackground;
	pWnd=GetDlgItem(IDC_STATIC_SCENE);
	pDC=pWnd->GetDC();	

	if(!(m_bmpPerson.LoadBitmap(IDB_BITMAP_PERSON)&&m_bmpBK.LoadBitmap(IDB_BITMAP_SCENE)))  //加载图片
	{
		AfxMessageBox(L"Can not load the 2 pictures correctly!");
		return ;
	}
	m_bmpPerson.GetObject(sizeof(bmPerson),&bmPerson);
	m_bmpBK.GetObject(sizeof(bmBackground),&bmBackground);
    dcPersonMask.CreateCompatibleDC(pDC) ;//生成CDC对象，创建与显示设备上下文兼容的内存设备上下文CDC对象
	dcBK.CreateCompatibleDC(pDC);
	dcPerson.CreateCompatibleDC(pDC);

	m_PersonMaskBitmap.CreateBitmap(bmPerson.bmWidth,bmPerson.bmHeight,1,1,NULL);
	CBitmap* OldPersonMaskBitmap = dcPersonMask.SelectObject(&m_PersonMaskBitmap);
	
	CBitmap *oldPerson=dcPerson.SelectObject(&m_bmpPerson);//将位图对象选入创建的内存设备上下文
	CBitmap *oldbackground=dcBK.SelectObject(&m_bmpBK);

	COLORREF l_crOldBack=dcPerson.SetBkColor(RGB(0,0,0));
	dcPersonMask.StretchBlt(0,0,bmPerson.bmWidth,bmPerson.bmHeight,&dcPerson,0,0,bmPerson.bmWidth,bmPerson.bmHeight,SRCCOPY);
	dcPerson.SetBkColor(l_crOldBack);

	dcBK.MaskBlt(x1,y1,bmPerson.bmWidth,bmPerson.bmHeight,&dcPerson,0,0,m_PersonMaskBitmap,0,0,ROP4_TRANSPARENTBLIT );
	//显示图片
	//pDC->StretchBlt(0,0,bmBackground.bmWidth,bmBackground.bmHeight,&dcBK,0,0,bmBackground.bmWidth,bmBackground.bmHeight,SRCCOPY);
	pDC->TransparentBlt(0,0,bmBackground.bmWidth,bmBackground.bmHeight,&dcBK,0,0,bmBackground.bmWidth,bmBackground.bmHeight,RGB(255,255,255));

[wyx100]

http://blog.csdn.net/zhoubl668/article/details/4328424

[gibsonboy]

http://blog.csdn.net/zhoubl668/article/details/4328424