void CDRImageStatic::ShowImg(CDC *dc, CRect rect)标签:nCurPosX,CDC,缓冲,dc,bmp,SelectObject,绘图,memDC,rect From: https://blog.51cto.com/u_15942605/6022281
{
CBitmap bmp;
bmp.CreateCompatibleBitmap(dc, m_nWidth, m_nHeight);
CBitmap* pOld=NULL; CDC memDC;
memDC.CreateCompatibleDC( dc );
if (m_nColor!=NULL)
{
EnterCriticalSection(&csImgCriticalSection);
bmp.SetBitmapBits(sizeof(*m_nColor)*m_nHeight*m_nWidth, m_nColor);
LeaveCriticalSection(&csImgCriticalSection);
pOld = memDC.SelectObject( &bmp );
}
if((m_nDXA==0))
{
EnterCriticalSection(&csMyCriticalSection); int oldmode=memDC.SetBkMode(TRANSPARENT);
CPen * pOldPen=memDC.SelectObject(&m_Pen); memDC.MoveTo(rect.right-m_nCurPosX,0);
memDC.LineTo(rect.right-m_nCurPosX,rect.bottom); memDC.SelectObject(pOldPen);
memDC.SetBkMode(oldmode); BOOL bbR=m_nCurPosX!=m_nOldPosX;
if (!this->m_blCreateLine || bbR)
{
this->m_blCreateLine=TRUE;
m_nOldPosX=m_nCurPosX;
InvalidateRect(rect,FALSE);
}
memDC.MoveTo(CPoint(0,0));
LeaveCriticalSection(&csMyCriticalSection);
} dc->BitBlt( rect.left, rect.top, rect.Width(), rect.Height(), &memDC, 0, 0, SRCCOPY );
if (pOld!=NULL)
{
memDC.SelectObject(pOld);
}
memDC.DeleteDC();
bmp.DeleteObject();
}