Curl users

I am sure this topic has been asked before, but still 'cannot find a good answer after googleing and
searching the archives.

Hope someone can answer asap.

My situation: Working on windows vista version

I have a downloaded a png image into buffer through the following

curl_easy_setopt(curl, CURLOPT_WRITEDATA, &imgbuf);
curl_easy_setopt(curl, CURLOPT_URL,"http://.../imge.png");
result = curl_easy_perform(curl);
//where imgbuf is string type

          if(result == CURLE_OK){
here after filling buffer from download, what is the best and easy way to
get into image format, preferably png or bmp

gdiplus (gdiplus+) preferred or any windows imaging lib/dll

need a sort of skeleton code. Thanks a bunch for answering.

with best regards

here is what 'came up with for GDIPlus

if you wanted to see (but doesnt work)
====================
istringstream ss1(imgbuf); //tried stringstream and other combinations too

               HGLOBAL hBuffer;

               hBuffer = ::GlobalAlloc(GMEM_MOVEABLE,sizeof(ss1));

               void* pBuffer = ::GlobalLock(hBuffer);

               CopyMemory(pBuffer, ss1, sizeof(ss1)); //is this the right way?

               IStream* pStream = NULL;

                        if(::CreateStreamOnHGlobal(hBuffer,FALSE,&pStream) == S_OK)

                        {

                                Image * m_BackImage = Gdiplus::Image::FromStream(pStream,false);

                                PixelFormat pf = m_BackImage->GetPixelFormat();

                    cout<< "the image format " <<
m_BackImage->GetPixelFormat() << " pf is " << pf <<
 "the const is " << PixelFormat24bppRGB
 << endl;

                        if(pf == PixelFormat24bppRGB)

      printf("The pixel format of image 1 is 24bppRGB.\n");
==========================
                                               

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Received on 2011-05-27