bug#4367: 23.1; unable to view this png image

[Jason Rumney <jasonr@gnu.org>]

Xah Lee wrote:
> This is:
> GNU Emacs 23.1.1 (i386-mingw-nt6.0.6002) of 2009-07-29 on SOFT-MJASON
This is the basic precompiled Windows binary.  It contains only Emacs 
and the libxpm library (this is an exception to the general rule that 
third party components are not included, since correct display of the 
toolbar and splash screen depends on it).

> on the other hand, i was able to open png or jpg files using emacsW32
> GNU Emacs 23.1.50.1 (i386-mingw-nt6.0.6002) of 2009-06-30 on 
> LENNART-69DE564 (patched)
That distribution of Emacs comes with a lot of third party tools that 
are useful alongside Emacs. Things like the image libraries, binaries of 
GNU find, grep, diff etc. If you still have that installed, adding the 
directory where all those tools are located to your system PATH will 
allow them to be used by both versions of Emacs.


> Not sure what you mean updating libpng, since this is on Windows, i 
> presume any png lib is included in emacs... or, humm... does this mean 
> if i don't have libpng program installed separated on Windows then 
> emacs won't open image files?

Yes. Suitable binaries for the image libraries and more are available 
from gnuwin32.sourceforge.net