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-rw-r--r--nt/INSTALL17
1 files changed, 15 insertions, 2 deletions
diff --git a/nt/INSTALL b/nt/INSTALL
index 9f543151a94..c324fb4ae7d 100644
--- a/nt/INSTALL
+++ b/nt/INSTALL
@@ -488,6 +488,7 @@ build will run on Windows 9X and newer systems).
Does Emacs use a gif library? yes
Does Emacs use a png library? yes
Does Emacs use -lrsvg-2? yes
+ Does Emacs use -lwebp? yes
Does Emacs use cairo? no
Does Emacs use -llcms2? yes
Does Emacs use imagemagick? no
@@ -597,8 +598,8 @@ build will run on Windows 9X and newer systems).
* Optional image library support
In addition to its "native" image formats (pbm and xbm), Emacs can
- handle other image types: xpm, tiff, gif, png, jpeg and experimental
- support for svg.
+ handle other image types: xpm, tiff, gif, png, jpeg, webp and
+ experimental support for svg.
To build Emacs with support for them, the corresponding headers must
be in the include path and libraries should be where the linker
@@ -736,6 +737,18 @@ build will run on Windows 9X and newer systems).
without it by specifying the --without-rsvg switch to the configure
script.
+ For WebP images you will need libwebp. You can find it here:
+
+ http://sourceforge.net/projects/ezwinports/files/
+
+ Note: the MS-Windows binary distribution on the Google site:
+
+ https://developers.google.com/speed/webp/
+
+ was compiled by MSVC, and includes only static libraries, no DLLs.
+ So you cannot use that to build Emacs with WebP support on
+ MS-Windows, as that needs libwebp as a DLL.
+
Binaries for the other image libraries can be found on the
ezwinports site or at the GnuWin32 project (the latter are generally
very old, so not recommended). Note specifically that, due to some