用位图画扑克问题

Question

void CPoker::Show(CDC *pDC,int Side)
{
CDC BitmapDC,MaskDC;
BitmapDC.CreateCompatibleDC (pDC);
MaskDC.CreateCompatibleDC (pDC);
BitmapDC.SelectObject(Side&(~Deceit)?Poker:Images[Which]);
MaskDC.SelectObject(&Mask);
MaskDC.BitBlt(Left,Top,71,96,&BitmapDC,0,0,SRCCOPY);
pDC->BitBlt(Left,Top,71,96,&BitmapDC,0,0,SRCINVERT);
pDC->BitBlt(Left,Top,71,96,&MaskDC,0,0,SRCAND);
pDC->BitBlt(Left,Top,71,96,&BitmapDC,0,0,SRCINVERT);
}
这里显示看不太懂，pDC->BitBlt(Left,Top,71,96,&BitmapDC,0,0,SRCCOPY);这样显示的话图像会不清晰，哪位达人帮忙解释下，谢谢。

Answer 1

void CPoker::Show(CDC *pDC,int Side)
{
    CDC BitmapDC,MaskDC; // 声明两个dd
    BitmapDC.CreateCompatibleDC (pDC); // 然后create..(内存dc) 
    MaskDC.CreateCompatibleDC (pDC);   // ......
    BitmapDC.SelectObject(Side&(~Deceit)?Poker:Images[Which]); // 判断某方?然后选入(Which)位图
    MaskDC.SelectObject(&Mask);                                // 这个选入蒙版(用来透明Blt)
    MaskDC.BitBlt(Left,Top,71,96,&BitmapDC,0,0,SRCCOPY);       // 制造蒙版
    pDC->BitBlt(Left,Top,71,96,&BitmapDC,0,0,SRCINVERT);       // 以下三步直接透明合成屏幕. 异或
    pDC->BitBlt(Left,Top,71,96,&MaskDC,0,0,SRCAND);            // 与
    pDC->BitBlt(Left,Top,71,96,&BitmapDC,0,0,SRCINVERT);       // 异或
}
===========================
ms没你这句: pDC->BitBlt(Left,Top,71,96,&BitmapDC,0,0,SRCCOPY); 哦~~~够清楚未?

Answer 2

另:
void CPoker::Show(CDC *pDC,int Side) 
{ 
    CDC BitmapDC,MaskDC; // 声明两个dd 
    BitmapDC.CreateCompatibleDC (pDC); // 然后create..(内存dc) 
    MaskDC.CreateCompatibleDC (pDC);  // ...... 
    BitmapDC.SelectObject(Side&(~Deceit)?Poker:Images[Which]); // 判断某方?然后选入(Which)位图 
    MaskDC.SelectObject(&Mask);                                // 这个选入蒙版(用来透明Blt) 
    MaskDC.BitBlt(Left,Top,71,96,&BitmapDC,0,0,SRCCOPY);      // 制造蒙版 
    pDC->BitBlt(Left,Top,71,96,&BitmapDC,0,0,SRCINVERT);      // 以下三步直接透明合成屏幕. 异或 
    pDC->BitBlt(Left,Top,71,96,&MaskDC,0,0,SRCAND);            // 与 
    pDC->BitBlt(Left,Top,71,96,&BitmapDC,0,0,SRCINVERT);      // 异或 
} 这段代码只选入不选出,肯定造成GDI资源泄漏..good luck

Answer 3

顶 ======================================== 
提界面问题，UIPower有问必答！ 
界面论坛：http://www.uipower.com/bbs