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diff --git a/libraries/evas/m4/evas_dither.m4 b/libraries/evas/m4/evas_dither.m4
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+dnl Copyright (C) 2009 Vincent Torri <vtorri at univ-evry dot fr>
+dnl That code is public domain and can be freely used or copied.
+
+dnl Macro that enables dithering support is wanted.
+
+dnl Usage: EVAS_CHECK_DITHER(dither, description [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
+dnl The parameter 'dither' is the type of dithering.
+dnl The parameter 'description' is the description of the dithering.
+dnl Defines BUILD_[TYPEOFDITHERING]
+
+AC_DEFUN([EVAS_CHECK_DITHER],
+[
+m4_pushdef([UP], m4_translit([$1], [-a-z], [_A-Z]))dnl
+m4_pushdef([DOWN], m4_translit([$1], [-A-Z], [_a-z]))dnl
+
+AC_ARG_ENABLE([$1],
+   AC_HELP_STRING([--enable-$1], [enable $2 @<:@default=disabled@:>@]),
+   [
+    if test "x${enableval}" = "xyes" ; then
+       _efl_enable_dither_option_[]DOWN="yes"
+    else
+       _efl_enable_dither_option_[]DOWN="no"
+    fi
+   ],
+   [_efl_enable_dither_option_[]DOWN="no"])
+
+AC_MSG_CHECKING(whether to build $2)
+AC_MSG_RESULT([${_efl_enable_dither_option_[]DOWN}])
+
+if test "x${_efl_enable_dither_option_[]DOWN}" = "xyes" ; then
+   AC_DEFINE([BUILD_]UP[], [1], [define to 1 if you have the $2 support])
+fi
+
+if test "x${_efl_enable_dither_option_[]DOWN}" = "xyes" ; then
+   m4_default([$3], [:])
+else
+   m4_default([$4], [:])
+fi
+
+m4_popdef([UP])
+m4_popdef([DOWN])
+])
+
+dnl End of evas_dither.m4