我想用双缓冲绘图,但是绘图的内容太多,于是把所有需要绘制的图片放在一个DC中一起绘制,然后拷到PDC中,为什么显示不出图片啊???找到答案就给分,下面是代码,,谢谢,void CFarmerView::OnDraw(CDC* pDC)
{
CFarmerDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
CDC maDC;
maDC.CreateCompatibleDC(pDC);
CRect rect;
GetClientRect(rect);///取得客户区域
pDC->FillRect(rect,&m_brushBackground); ///用背景画刷填充区域
CString str;
str.Format("%d",qian);
maDC.TextOut(160,75,str);
CString str1;
str1.Format("%d",jingyan);
maDC.TextOut(160,55,str1);
for (int i=9;i<18;i++)
{
if (kaigen[i]==TRUE)
{
bbrush(&maDC,IDB_DI,Pointdi[i-9]);
}
}
BBrush(&maDC,IDB_KUOJIAN,Point[kuo]);
for(i=0;i<18;i++)
{
for (int j=1;j<=6;j++)
{
for (int k=0;k<=6;k++)
{
if (a[i][j]==k&&k>0&&k<5)
{
BBrush(&maDC,id[j][k],Point[i]);
}
else if (a[i][j]==k&&k==0||a[i][j]==k&&k>4)
{
BBrush(&maDC,id[j][k],Point[i]);
}
}
}
}
CPoint p;
p.x=827;
p.y=60;
if (caidan)
{
BBrush(&maDC,IDB_CAIDAN,p);
}
if(!caidan)
{
BBrush(&maDC,IDB_KONG,p);
}
pDC->BitBlt(0,0,1000,768,&maDC,0,0,SRCCOPY);
maDC.DeleteDC();
}
{
CFarmerDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
CDC maDC;
maDC.CreateCompatibleDC(pDC);
CRect rect;
GetClientRect(rect);///取得客户区域
pDC->FillRect(rect,&m_brushBackground); ///用背景画刷填充区域
CString str;
str.Format("%d",qian);
maDC.TextOut(160,75,str);
CString str1;
str1.Format("%d",jingyan);
maDC.TextOut(160,55,str1);
for (int i=9;i<18;i++)
{
if (kaigen[i]==TRUE)
{
bbrush(&maDC,IDB_DI,Pointdi[i-9]);
}
}
BBrush(&maDC,IDB_KUOJIAN,Point[kuo]);
for(i=0;i<18;i++)
{
for (int j=1;j<=6;j++)
{
for (int k=0;k<=6;k++)
{
if (a[i][j]==k&&k>0&&k<5)
{
BBrush(&maDC,id[j][k],Point[i]);
}
else if (a[i][j]==k&&k==0||a[i][j]==k&&k>4)
{
BBrush(&maDC,id[j][k],Point[i]);
}
}
}
}
CPoint p;
p.x=827;
p.y=60;
if (caidan)
{
BBrush(&maDC,IDB_CAIDAN,p);
}
if(!caidan)
{
BBrush(&maDC,IDB_KONG,p);
}
pDC->BitBlt(0,0,1000,768,&maDC,0,0,SRCCOPY);
maDC.DeleteDC();
}
CDC maDC;
maDC.CreateCompatibleDC(pDC);
CRect rect;
GetClientRect(rect);///取得客户区域
CBitmap bmp;
bmp.CreateCompatibleBmp(pDC,rect.Width(),rect.Height());
maDC.SelectObject(&bmp);
bmp.CreateCompatibleBmp(pDC,rect.Width(),rect.Height());
maDC.SelectObject(&bmp);
这个很重要。
bmp.CreateCompatibleBmp(pDC,rect.Width(),rect.Height());
maDC.SelectObject(&bmp);
在内存dc中创建这里就简单的说是一张图(包括所要的文字,背景等元素),然后将这张图再拷贝到
设备上下文中