고 ¶
MFC 기 .
¶
~cpp
#pragma once
class CmyDouBuffDC
{
private:
CRect m_rt;
CDC* m_pDC;
CDC* m_pMemDC;
CBitmap m_bmp;
public:
CmyDouBuffDC(CDC *pDC, CRect rt){
m_rt = rt;
m_pDC = pDC;
m_pMemDC = new CDC();
m_pMemDC->CreateCompatibleDC(m_pDC);
m_bmp.CreateCompatibleBitmap(m_pDC, m_rt.Width(), m_rt.Height());
m_pMemDC->SelectObject(&m_bmp);
m_pMemDC->Rectangle(0, 0, m_rt.Width(), m_rt.Height());
}
~CmyDouBuffDC(void){
m_pDC->BitBlt(0, 0, m_rt.Width(), m_rt.Height(), m_pMemDC, 0, 0, SRCCOPY);
m_pMemDC->DeleteDC();
m_bmp.DeleteObject();
}
CDC* getMemDC(){return m_pMemDC;}
};
¶
Test OnDraw . OnDraw Invalidate OnPaint .
OnDraw 경 .
OnDraw 경 .
~cpp
void CDoubleBufferingView::OnDraw(CDC* pDC)
{
CDoubleBufferingDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
//DoubleBuffering
CRect rt;
GetClientRect(&rt);
CmyDouBuffDC *douDC = new CmyDouBuffDC(pDC, rt);
//draw
CDC *memdc = douDC->getMemDC();
memdc->Ellipse(this->pmBoundBall->x - mi_ballSize, this->pmBoundBall->y - mi_ballSize,
this->pmBoundBall->x + mi_ballSize, this->pmBoundBall->y + mi_ballSize);
//end DoubleBuffering
delete douDC;
}
¶
getMemDC() DC 그 그.
¶
그 고 .
¶
기 .
