GDI+ Bitmap Save problem

Question

Bitmap bff(L"1.jpg");
bff.Save(L"2.jpg", &Gdiplus::ImageFormatJPEG, NULL);

This creates a new file 2.jpg with zero-bytes length. Isn't it supposed to write an image file that is identical to 1.jpg?

Why I'm having zero-bytes length files? I'm doing this test because writing other Bitmaps to files end the same way.

Answer 1

&Gdiplus::ImageFormatJPEG is the wrong value to send as the second parameter (thus why the new file is zero bytes large). Take a look at the code example at the bottom of the Image::Save() reference page which demonstrates the proper usage of Save().

Answer 2

AFAIK, you can't just pass the image format GUID ('ImageFormatJPEG' in your case) to 'Image::Save' method. The second argument is supposed to hold the encoder GUID, not a format GUID. See an example here