IPicture problem
in [MFC]
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From: Mark F. on 31 Aug 2006 08:45 I have an image control that I use to display gif and jpg images. Using an IPicture object how do I create a stream to save the file to disk? IPicture * m_pPicture; // in header // in .cpp HRESULT hr; IStream *pStream = NULL; LONG size; // I need to know how to create the proper stream here... m_pPicture->SaveAsFile(pStream, FALSE, &size); Thanks, Mark
From: Ajay Kalra on 31 Aug 2006 09:34 Heres an example of IPicture: http://msdn.microsoft.com/msdnmag/issues/01/10/c/ GDI+ might be easier. There is also the CImage class. -- Ajay Kalra [MVP - VC++] ajaykalra(a)yahoo.com "Mark F." <replytogroup(a)news.com> wrote in message news:GRAJg.5391$o42.569(a)tornado.texas.rr.com... > I have an image control that I use to display gif and jpg images. Using > an IPicture object how do I create a stream to save the file to disk? > > IPicture * m_pPicture; // in header > > // in .cpp > > HRESULT hr; > IStream *pStream = NULL; > LONG size; > > // I need to know how to create the proper stream here... > > m_pPicture->SaveAsFile(pStream, FALSE, &size); > > > Thanks, > Mark > > >
From: Mark F. on 31 Aug 2006 09:43 Thanks, but that doesn't explain how to properly create the stream to save the file to disk. There are dozens of articles on how to load and display images. I have resized the image and I need to write the new image in m_pPicture to disk file. Mark "Ajay Kalra" <ajaykalra(a)yahoo.com> wrote in message news:uOBQIKQzGHA.4452(a)TK2MSFTNGP05.phx.gbl... > Heres an example of IPicture: > > http://msdn.microsoft.com/msdnmag/issues/01/10/c/ > > GDI+ might be easier. There is also the CImage class. > > -- > Ajay Kalra [MVP - VC++] > ajaykalra(a)yahoo.com > > > "Mark F." <replytogroup(a)news.com> wrote in message > news:GRAJg.5391$o42.569(a)tornado.texas.rr.com... > > I have an image control that I use to display gif and jpg images. Using > > an IPicture object how do I create a stream to save the file to disk? > > > > IPicture * m_pPicture; // in header > > > > // in .cpp > > > > HRESULT hr; > > IStream *pStream = NULL; > > LONG size; > > > > // I need to know how to create the proper stream here... > > > > m_pPicture->SaveAsFile(pStream, FALSE, &size); > > > > > > Thanks, > > Mark > > > > > > > >
From: David Ching on 31 Aug 2006 11:58 "Mark F." <replytogroup(a)news.com> wrote in message news:GRAJg.5391$o42.569(a)tornado.texas.rr.com... >I have an image control that I use to display gif and jpg images. Using > an IPicture object how do I create a stream to save the file to disk? > > IPicture * m_pPicture; // in header > > // in .cpp > > HRESULT hr; > IStream *pStream = NULL; > LONG size; > > // I need to know how to create the proper stream here... > > m_pPicture->SaveAsFile(pStream, FALSE, &size); > > > Thanks, > Mark > > > In Paul diLascia's CPicture class (from a MSJ/MSDN article, you can google it) has: BOOL CPictureOle::Load(CArchive& ar) { CArchiveStream arcstream(&ar); return Load((IStream*)&arcstream); } so it seems you can use an MFC CArchiveStream and cast it to an IStream. Paul has written actually two CPicture classes, one uses OleLoadPicture (the one you want), the other uses GDI+. -- David http://www.dcsoft.com
From: Ajay Kalra on 31 Aug 2006 12:02
> Paul has written actually two CPicture classes, one uses OleLoadPicture (the > one you want), the other uses GDI+. > I missed the one which uses GDI+. Was it in MSDN as well? -- Ajay Kalra [MVP - VC++] ajaykalra(a)yahoo.com |