Re: TransparentBlt troubles...

From:
"AliR \(VC++ MVP\)" <AliR@online.nospam>
Newsgroups:
microsoft.public.vc.mfc
Date:
Fri, 09 Nov 2007 19:49:11 GMT
Message-ID:
<XQ2Zi.68328$Um6.59705@newssvr12.news.prodigy.net>
Just a couple of things I noticed:

void TestView::OnDraw(CDC* dc)
{
TestDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);

CDC dcMem;
dcMem.CreateCompatibleDC(dc);

********************************************************
//Remove this line, this is causing a resource leak! It is not even
necessary.

HDC hMemDC = CreateCompatibleDC(dcMem);

********************************************************

dc->SetBkColor(RGB(120,120,120));


********************************************************
//this dc doesn't seem to be used anywhere!
//remove this line also

CMemDC pDC(dc);


********************************************************

CRect rect;
GetClientRect(rect);

int B = 10;
int W = __min(rect.Width(), rect.Height());
W = (W - 2*B)/16;

CBitmap foo;
BITMAP bitMapInfo;
foo.LoadBitmap(IDB_EMPTY);
foo.GetBitmap(&bitMapInfo);
dcMem.SelectObject(foo);


********************************************************
//here just to be consistant I would use the CDC::TrasparentBlt

dc->TransparentBlt(100, 120, bitMapInfo.bmWidth,
bitMapInfo.bmHeight, &dcMem, 0, 0, bitMapInfo.bmWidth,
bitMapInfo.bmHeight, RGB (0, 128, 128));


********************************************************

}


AliR.

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