GDI+的问题

2010-09-22 01:25:24 154 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

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关于GDI+产生OutOfMemory问题及GDI+用法概要最近学校作业要处理图片，本来阅读详情



void CTestDlg::OnButton1() 

{

	CDC *pDC;



	pDC = CDC::FromHandle(::GetDC(NULL));



	int Width = GetSystemMetrics(SM_CXSCREEN);

	int Height = GetSystemMetrics(SM_CYSCREEN);



	CDC memDC;

	memDC.CreateCompatibleDC(pDC);



	CBitmap memBitMap,*oldMemBitMap;



	memBitMap.CreateCompatibleBitmap(pDC, Width, Height);



	oldMemBitMap = memDC.SelectObject(&memBitMap);



	memDC.BitBlt(0,0,Width,Height,pDC,0,0,SRCCOPY);



	DWORD dwCount = 1280*800*4;



	BYTE *pBitMapBits = new BYTE[1280*800*4];



	ZeroMemory(pBitMapBits,dwCount);

	

	DWORD dwTemp = memBitMap.GetBitmapBits(dwCount,(LPVOID)pBitMapBits);

	

	CMemFile mfBitMap(pBitMapBits,(UINT)dwCount,0);

	CMemFile mfNewBitMap;

	

	MBmpToMImage(mfBitMap,mfNewBitMap);



	CBitmap bpNewBitMap;

}



BOOL CTestDlg:: MBmpToMImage(CMemFile& cbfBmp, CMemFile& cbfImage/*, CString strType*/)

{

	int iBmpSize = cbfBmp.GetLength();

	HGLOBAL hMemBmp = GlobalAlloc(GMEM_FIXED, iBmpSize);

	if (hMemBmp == NULL) return FALSE;

	IStream* pStmBmp = NULL;

	CreateStreamOnHGlobal(hMemBmp, FALSE, &pStmBmp);

	if (pStmBmp == NULL) 

	{

		GlobalFree(hMemBmp);

		return FALSE;

	}

	BYTE* pbyBmp = (BYTE *)GlobalLock(hMemBmp);

	cbfBmp.SeekToBegin();

	cbfBmp.Read(pbyBmp, iBmpSize);

	

	

	Image imImage(pStmBmp,TRUE);

	CLSID clImageClsid;

	int i;

	i = GetEncoderClsid(L"image/jpeg", &clImageClsid);



	int j = imImage.Save(L"C:\\x.jpg",&clImageClsid);



	if (1 != j)

	{

		MessageBox("错误2");

	}

	return TRUE;

}