bmpd不是只获取了bmp1位图的大小?为什么连位图的样子也获取了?

[mirro187_]

CClientDC rdc(this);
CDC dc1,dc2;
CBitmap bmp1,bmpd;
BITMAP bitmap;	
bmp1.LoadBitmap(IDB_BITMAP);
bmp1.GetBitmap(&bitmap); 
bmpd.CreateBitmap(bitmap.bmWidth,bitmap.bmHeight,1,bitmap.bmBitsPixel,NULL);  
	
dc1.CreateCompatibleDC(&rdc);
dc1.SelectObject(&bmp1);
		 
LPBYTE lpbts;
int ncount=0;
ncount=(bitmap.bmHeight*bitmap.bmWidthBytes);  
lpbts=new BYTE[ncount];
bmp1.GetBitmapBits(ncount,lpbts); 
bmpd.SetBitmapBits(ncount,lpbts);
	

[dubiousway]

bmp1.GetBitmap(&bitmap); //这里获取大小 bmpd.CreateBitmap(bitmap.bmWidth,bitmap.bmHeight,1,bitmap.bmBitsPixel,NULL); //建立相同大小的位图 LPBYTE lpbts; int ncount=0; ncount=(bitmap.bmHeight*bitmap.bmWidthBytes); lpbts=new BYTE[ncount]; bmp1.GetBitmapBits(ncount,lpbts); //这里获取位图的样子，就是各个向素值 bmpd.SetBitmapBits(ncount,lpbts); //复制向素值到新的位图bmpd