RichEdit控件保存图片问题

[sghcpt]

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);
			}
		}
	}					
}

[sghcpt]

问题没有回答，我顶上去。。。。。。。。。。

[fishion]

简单的尝试在PlayMetaFile之后用CImage类来传入hMemBmp然后再Save ImageFormatPNG类型

[sghcpt]

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？

[sghcpt]

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]

又没有人回答了，我顶上去。。。。

[huangys_fly]

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