Re: My emacs on Windows doesn´t show Images (png, jpeg...) even with .dll-files

[Eli Zaretskii <eliz@gnu.org>]

> Date: Thu, 25 Aug 2011 10:32:45 +0200
> From: Philipp Hahne <philipp.hahne@kit.edu>
> 
> > First, which version of Emacs is this, and where did you get it?
> version: Emacs 23.3.1 (i386-mingw-nt6.1.7601) of 2011-03-10 on 3249CTO
> get from: http://ftp.gnu.org/pub/gnu/emacs/windows/
> [...]
> now I have included only the dll´s requestet for image support in 
> README.W32 in the ...\emacs-23.3\bin directory, e.g. jpeg 62.dll, 
> libtiff3.dll, libungif4.dll (all downloaded from gnuwin32 project) and 
> libpng14-14.dll ( downloaded from 
> http://trac.mccode.org/browser/branches/mcstas-1.x/support/Win32/gnuplot/libpng14-14.dll?rev=3081)
> 
> I am not sure what ist meant with:
> "If you have image support DLLs under different names, customize the 
> value of `dynamic-library-alist'."

For Emacs 23.3, the correct variable is `image-library-alist'.

If you evaluate `image-library-alist', like this:

 M-: image-library-alist RET

the value tells you which DLLs Emacs looks for when it needs to
display each image type.  If your DLLs are called differently, you
will need to modify the value to match the DLLs you have.

> Only when I try to open .jpg and .png I get an empty square, and trying 
> to open pdf getting the message: Unable to render file. View extracted 
> text instead? (y or n)

JPEG images work for me with jpeg62.dll whose size is 127488 bytes and
date 2005-06-04; I downloaded it long ago from GnuWin32.  Is that what
you have?

As for PNG, I suggest to download from here:

  http://www.gtk.org/download-windows.html

as recommended by README.W32.