C / C++ / MFC

Mark Salsbery wrote:

friend classes are probably a kludge anyway

Christian Graus wrote:

A little. But, making a property public throws away encapsulation entirely.

Mark Salsbery wrote:

How does that differ from using friend?

The Apocalyptic Teacup wrote:

If not, then what is the advantage of a managed class in C++?

gigo2k6 wrote:

is it posible that i can use an diectshow graph inside an dll ?

gigo2k6 wrote:

o i want to call this dll ofer an com interface .

gigo2k6 wrote:

ahh ok / is there a good manual for creating a dll for com on c++ ?

Cpt Rick wrote:

BTW: This is a skinned based app, so the skin designer controls the visibility of the individual controls, although they still have to exist. That is the reason for creating them without visibility.

// Resize png to 320x240 bmp
// The GDI+ Bitmap class is derived from the GDI+ Image class
// I've made no assumptions on the src image dimensions
//   You should use Image::GetHeight()/Image::GetWidth() in real life :)
 
   Gdiplus::Bitmap SrcBitmap(L"C:\\test.png", FALSE);
 
   Gdiplus::Bitmap DstBitmap(320, 240, SrcBitmap.GetPixelFormat()); 
 
   Graphics DstGraphics(&DstBitmap);
   DstGraphics.DrawImage(&SrcBitmap, 0, 0, 320, 240);
 
   CLSID bmpClsid;
   GetEncoderClsid(L"image/bmp", &bmpClsid);
 
   DstBitmap.Save(L"C:\\test.bmp", &bmpClsid, NULL);

// This utility ripped right from the SDK
 
int GetEncoderClsid(const WCHAR* format, CLSID* pClsid)
{
   UINT  num = 0;          // number of image encoders
   UINT  size = 0;         // size of the image encoder array in bytes
 
   ImageCodecInfo* pImageCodecInfo = NULL;
 
   GetImageEncodersSize(&num, &size);
   if(size == 0)
      return -1;  // Failure
  
   pImageCodecInfo = (ImageCodecInfo*)(malloc(size));
   if(pImageCodecInfo == NULL)
      return -1;  // Failure
 
   GetImageEncoders(num, size, pImageCodecInfo);
 
   for(UINT j = 0; j < num; ++j)
   {
      if( wcscmp(pImageCodecInfo[j].MimeType, format) == 0 )
      {
         *pClsid = pImageCodecInfo[j].Clsid;
         free(pImageCodecInfo);
         return j;  // Success
      }    
   }
 
   free(pImageCodecInfo);
   return -1;  // Failure
}