RichEdit控件保存图片问题

sghcpt 2013-07-05 01:44:26

我的问题是这样的，我想把从Word文档拷贝过来的图片粘贴到RichEdit控件中，再点击某个按钮，就把RichEdit控件中的图片保存为png图片。下面代码只能保存为wmf文件，不知道怎么能保存为png图片。

CComPtr<IRichEditOle> pTalkRichEditOle;

CComPtr<ITextRange> pTalkRange;

::SendMessage(m_pwndTalk->m_hWnd,EM_GETOLEINTERFACE,0,(LPARAM)&pTalkRichEditOle);

CComQIPtr<ITextDocument>(pTalkRichEditOle)->Range(0,0,&pTalkRange);

int pic_count = (int)pTalkRichEditOle->GetObjectCount();

for (int nIndex = 0; nIndex < pic_count; nIndex++)

{

	REOBJECT reobject = {0};

	reobject.cbStruct = sizeof(REOBJECT);

	pTalkRichEditOle->GetObject(i, &reobject, REO_GETOBJ_POLEOBJ);

	reobject.poleobj->SetClientSite(NULL);

	CComQIPtr<IDataObject> pDataObject = reobject.poleobj;

	if (!pDataObject) continue;

	

	CComPtr<IEnumFORMATETC> pEnumFormatEtc;

	if (SUCCEEDED(pDataObject->EnumFormatEtc(DATADIR_GET,&pEnumFormatEtc)) && pEnumFormatEtc)

	{

		FORMATETC fmt = {0};

		if (S_FALSE != pEnumFormatEtc->Next(1,&fmt,NULL))

		{

			STGMEDIUM medium;

			pDataObject->GetData(&fmt,&medium);

			if (fmt.cfFormat == CF_METAFILEPICT)

			{

				HMETAFILEPICT hMetaFilePict = medium.hMetaFilePict;

				LPMETAFILEPICT pMFP = (LPMETAFILEPICT)GlobalLock(hMetaFilePict);

				SIZE size;

				size.cx = 19;

				size.cy = 19;

				HWND hWnd = ::GetDesktopWindow();

				HDC hDC = ::GetDC(hWnd);



				HDC hMemDC = ::CreateCompatibleDC(hDC);

				HBITMAP hMemBmp = ::CreateCompatibleBitmap(hDC, size.cx, size.cy);

				HBITMAP hPrevBmp = (HBITMAP)::SelectObject(hMemDC, hMemBmp);

				::PlayMetaFile(hMemDC, pMFP->hMF);

				HMETAFILE hFile = CopyMetaFile(pMFP->hMF, _T("E:\\fromMSN.wmf"));

				DeleteMetaFile(hFile);

				GlobalUnlock(pMFP);

			}

		}

	}					

}

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huangys_fly 2013-08-10

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引用 4 楼 sghcpt 的回复:

不好意思，写错代码了，应该是下面的代码:

CxImage * pImage = new CxImage();
if (pImage)
{
   pImage->CreateFromHANDLE(hMemBmp);
   bool bRetCode = pImage->Save(bstrFullPathName,CXIMAGE_FORMAT_PNG);
   delete pImage;
   pImage = NULL;
}

这个不对把，CxImage说是CreateFromHANDLE都不准确，不知道你试过没有

sghcpt 2013-07-11

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又没有人回答了，我顶上去。。。。

sghcpt 2013-07-10

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不好意思，写错代码了，应该是下面的代码:

CxImage * pImage = new CxImage();
if (pImage)
{
   pImage->CreateFromHANDLE(hMemBmp);
   bool bRetCode = pImage->Save(bstrFullPathName,CXIMAGE_FORMAT_PNG);
   delete pImage;
   pImage = NULL;
}

sghcpt 2013-07-10

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To fishion: 谢谢你的回答。我在工程里使用了另外一个库，CxImage库。在PlayMetaFile函数后执行了下面的语句：

CxImage * pImage = new CxImage();
									pImage->CreateFromHANDLE(medium.hBitmap);
									bool bRetCode = pImage->Save(bstrFullPathName, CXIMAGE_FORMAT_PNG);
									delete pImage;
									pImage = NULL;

但是保存的png图片是错误的。请问上面的代码错了吗？