Fixing imagemagick on W32

[Stephen Leake]

Eli Zaretskii <address@hidden> writes:

> The Imagemagick build is not officially supported in the MS-Windows
> build, because no one submitted patches to make it behave like all the
> other optional image libraries.  By that I mean: be able to run an
> Emacs binary built with Imagemagick support on a system that doesn't
> have the Imagemagick DLLs installed.  AFAIU, the image.c.diff hack
> allows one to build Emacs with Imagemagick, but the resulting binary
> will refuse to run on a system where it cannot load the Imagemagick
> DLLs at startup.  That is not how we handle optional libraries in the
> Windows build.
>
> So the right way of handling this problem is to modify the Emacs
> Imagemagick support code in image.c so that it uses LOAD_DLL_FN etc.
> (There's one complication with Imagemagick: it needs to load 2 DLLs
> rather than one, and figuring out how to deal with that is part of the
> job.)

I'd like to work on this.

First I need a test; what elisp level functions use the imagemagick
functions in image.c? 

-- 
-- Stephe