Emacs doesn't display JPEG files correctly

Question

PNG images displays well on my computer, but the JPEG images are displayed incorrectly as small boxes as shown in the following image:

I'm running Emacs 24.4 under Windows 7. And I compiled libpng16.dll and libjpeg-9.dll myself.

I got the PNG library from here and compiled it using Visual Studio 13. And I got the JPEG library from here and compiled it using MinGW.

Answer 1

The problem lies in the self compiled libjpeg-9.dll. It is solved by downloading dll files from ezwinports as recommended:

Emacs can also support some other image formats with appropriate
libraries.  These libraries are all available on the following sites:

1. http://sourceforge.net/projects/ezwinports/files/
   -- leaner, more up-to-date builds, only for 32-bit Emacs
2. http://www.gtk.org/download/win32.php
   http://www.gtk.org/download/win64.php
   -- the GTK project site; offers much fatter builds, but includes
      64-bit DLLs (from the 2nd URL)
3. GnuWin32 project -- very old builds, not recommended