VC 背景填充位图的几种方法

IDB_BG 是位图资源的ID

 

方法一OnEraseBkgnd(CDC* pDC) { // 设置画刷为希望的背景 CDC backBmp;                backBmp.CreateCompatibleDC(pDC); CBitmap bitmap; bitmap.LoadBitmap(IDB_BG); CBrush m_brushBackground; m_brushBackground.CreatePatternBrush(&bitmap);    ///创建位图画刷 CBrush* pOldMemDCBrush=pDC->SelectObject(&m_brushBackground);  pDC->PatBlt(0,0,m_ScrollRect.Width(),m_ScrollRect.Height(),PATCOPY); pDC->SelectObject(pOldMemDCBrush); return TRUE;}

方法二OnEraseBkgnd(CDC* pDC) { CBitmap m_pMap; m_pMap.LoadBitmap(IDB_BG); CRect rect; GetClientRect(&rect);  BITMAP bm; CDC dcMem; m_pMap.GetObject(sizeof(BITMAP),&bm); dcMem.CreateCompatibleDC(pDC);  CBitmap* pOldBitmap = dcMem.SelectObject(&m_pMap); for (register int nX=0;nX<rect.right-rect.left;nX+=bm.bmWidth)  for(int nY=0;nY<rect.bottom-rect.top;nY+=bm.bmHeight) pDC->BitBlt(nX,nY,bm.bmWidth,bm.bmHeight,&dcMem,0,0,SRCCOPY); dcMem.SelectObject(pOldBitmap);  return TRUE;}

方法三OnEraseBkgnd(CDC* pDC) { CBitmap bmp; bmp.LoadBitmap(IDB_BG); ///加载位图 CBrush m_brushBackground; m_brushBackground.CreatePatternBrush(&bmp);    ///创建位图画刷 CRect rect; GetClientRect(&rect);  pDC->FillRect(rect,&m_brushBackground); //用背景画填充区域 return TRUE;}