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bug#25967: [PATCH] Add support for ImageMagick 7 (Bug#25967)
From: |
Eli Zaretskii |
Subject: |
bug#25967: [PATCH] Add support for ImageMagick 7 (Bug#25967) |
Date: |
Wed, 05 Sep 2018 05:38:45 +0300 |
> From: Andy Moreton <andrewjmoreton@gmail.com>
> Date: Tue, 04 Sep 2018 20:03:07 +0100
>
> >> + '(imagemagick "libMagickWand-7.Q16HDRI-6.dll")))
> >
> > Is this DLL name fixed for all the supported versions? It sounds
> > like it's only for Imagemagick v7, and so the DLL for version 6 will
> > be named differently.
>
> Indeed. v6 is legacy (and not available on any platform I currently test
> on).
I see a precompiled binary on the Imagemagick site.
> The DLL name is from the current package for MSYS2.
How frequently does the name of the DLL change? If it changes with
each update, we should find a way of allowing users to still use
previous or next compatible DLLs. We don't want to require them to
upgrade all the time.
> > For these two reasons, I think we should have a Lisp variable that
> > provides the version of Imagemagick with which Emacs was built, and we
> > need the dispatch in w32-win.el for loading the correct DLLs based on
> > that variable, like we do with libgif etc.
>
> Agreed. Do you use Imagemagick on mingw.org builds ? Is there a packaged
> library available there ?
No, not that I know of. I think we should provide compatibility to
MSYS2 packages and to packages provided by Imagemagick themselves.