dnl Process this file with autoconf to produce a configure script.
AC_PREREQ(2.57)
-AC_INIT(evince, 0.5.0)
-AM_INIT_AUTOMAKE(AC_PACKAGE_NAME, AC_PACKAGE_VERSION)
+AC_INIT([Evince],[2.20.0],[http://bugzilla.gnome.org/enter_bug.cgi?product=evince],[evince])
+AM_INIT_AUTOMAKE([1.9 dist-bzip2 no-dist-gzip])
AM_CONFIG_HEADER(config.h)
AM_PROG_CC_STDC
AC_PROG_CXX
AC_STDC_HEADERS
-AC_PROG_INTLTOOL
+IT_PROG_INTLTOOL([0.35.0])
AC_PATH_PROG([GLIB_GENMARSHAL], [glib-genmarshal])
AC_PATH_PROG([GLIB_MKENUMS],[glib-mkenums])
GNOME_CXX_WARNINGS
GNOME_DEBUG_CHECK
-ALL_LINGUAS="bg bn ca cs da de el en_CA en_GB es et eu fi fr gl gu he hi hu id it ja ko ku lt nb ne nl no pa pl pt pt_BR ro ru rw sk sq sr sr@Latn sv th tr uk wa zh_CN zh_TW"
+GTK_DOC_CHECK(1.0)
-AM_GLIB_GNU_GETTEXT
-
-GETTEXT_PACKAGE=AC_PACKAGE_NAME
+GETTEXT_PACKAGE=evince
AC_SUBST(GETTEXT_PACKAGE)
-AC_DEFINE_UNQUOTED(GETTEXT_PACKAGE,"$GETTEXT_PACKAGE", [Gettext package.])
+AC_DEFINE_UNQUOTED([GETTEXT_PACKAGE],["$GETTEXT_PACKAGE"],[Gettext package])
+AM_GLIB_GNU_GETTEXT
dnl Check dependencies
# SHELL_CFLAGS for shell implementation.
# SHELL_LIBS
-POPPLER_REQUIRED=0.4.1
-DBUS_GLIB_REQUIRED=0.33
-GTK_REQUIRED=2.6.0
-LIBGNOMEUI_REQUIRED=2.6.0
+DBUS_GLIB_REQUIRED=0.70
+GTK_REQUIRED=2.10.0
KEYRING_REQUIRED=0.4.0
-PKG_CHECK_MODULES(LIB, gtk+-2.0 >= $GTK_REQUIRED libgnomeui-2.0 >= $LIBGNOMEUI_REQUIRED)
+LIBGNOMEUI_REQUIRED=2.14.0
+LIBGNOME_REQUIRED=2.14.0
+LIBGNOMEPRINTUI_REQUIRED=2.6.0
+GNOME_ICON_THEME_REQUIRED=2.17.1
+LIBXML_REQUIRED=2.5.0
+
+GTK_PRINT_REQUIRED=2.10.0
+
+PKG_CHECK_MODULES(LIB, gtk+-2.0 >= $GTK_REQUIRED libxml-2.0 >= $LIBXML_REQUIRED)
PKG_CHECK_MODULES(BACKEND, gtk+-2.0 >= $GTK_REQUIRED gnome-vfs-2.0)
-PKG_CHECK_MODULES(FRONTEND_CORE, gtk+-2.0 >= $GTK_REQUIRED libgnomeui-2.0 >= $LIBGNOMEUI_REQUIRED libglade-2.0 poppler-glib >= $POPPLER_REQUIRED)
-PKG_CHECK_MODULES(POPPLER, poppler-glib >= $POPPLER_REQUIRED)
-PKG_CHECK_MODULES(SHELL_CORE, gtk+-2.0 >= $GTK_REQUIRED libgnomeui-2.0 >= $LIBGNOMEUI_REQUIRED gnome-vfs-2.0 libgnomeprint-2.2 >= 2.5.1 libgnomeprintui-2.2 libglade-2.0 gconf-2.0 poppler-glib >= $POPPLER_REQUIRED gnome-keyring-1 >= $KEYRING_REQUIRED)
+PKG_CHECK_MODULES(FRONTEND_CORE, gtk+-2.0 >= $GTK_REQUIRED libglade-2.0 gnome-vfs-2.0)
+PKG_CHECK_MODULES(SHELL_CORE, libxml-2.0 >= $LIBXML_REQUIRED gtk+-2.0 >= $GTK_REQUIRED gnome-icon-theme >= $GNOME_ICON_THEME_REQUIRED gnome-vfs-2.0 libglade-2.0 gconf-2.0 gnome-keyring-1 >= $KEYRING_REQUIRED)
+
+AC_ARG_WITH(libgnome,
+ AC_HELP_STRING([--without-libgnome],[disable the use of libgnome]),
+ [case "${withval}" in
+ yes) WITH_GNOME=yes ;;
+ no) WITH_GNOME=no ;;
+ *) AC_MSG_ERROR(bad value ${withval} for --with-libgnome) ;;
+ esac],
+ [WITH_GNOME=yes]) dnl Default value
+AM_CONDITIONAL(WITH_GNOME, test x$WITH_GNOME = "xyes")
+
+if test x$WITH_GNOME = "xyes"; then
+ PKG_CHECK_MODULES(GNOME, libgnome-2.0 >= $LIBGNOME_REQUIRED)
+ PKG_CHECK_MODULES(GNOMEUI, libgnomeui-2.0 >= $LIBGNOMEUI_REQUIRED)
+ AC_DEFINE([WITH_GNOME],[1],[Define if GNOME support is enabled])
+fi
GLIB_GENMARSHAL=`$PKG_CONFIG --variable=glib_genmarshal glib-2.0`
AC_SUBST(GLIB_GENMARSHAL)
+dnl ========= Print support
+AC_ARG_WITH(print,
+ [AC_HELP_STRING([--with-print=no/gtk/gnome/auto], [Compile with print support [default=auto]])],
+ PRINT=$withval,
+ PRINT="auto")
+
+PKG_CHECK_MODULES(GNOME_PRINT,
+ libgnomeprintui-2.2 >= $LIBGNOMEPRINTUI_REQUIRED,
+ enable_gnome_print=yes, enable_gnome_print=no)
+PKG_CHECK_MODULES(GTK_PRINT,
+ gtk+-unix-print-2.0 >= $GTK_PRINT_REQUIRED,
+ enable_gtk_print=yes, enable_gtk_print=no)
+enable_print=no
+if test x$PRINT = xgnome -a x$enable_gnome_print = xyes; then
+ enable_print=gnome
+else
+ if test x$PRINT = xgtk -a x$enable_gtk_print = xyes; then
+ enable_print=gtk
+ else
+ if test x$PRINT = xauto; then
+ if test x$enable_gtk_print = xyes; then
+ enable_print=gtk
+ else
+ if test x$enable_gnome_print = xyes; then
+ enable_print=gnome
+ fi
+ fi
+ fi
+ fi
+fi
+
+if test x$enable_print = xgnome; then
+ AC_SUBST(GNOME_PRINT_CFLAGS)
+ AC_SUBST(GNOME_PRINT_LIBS)
+ AC_DEFINE([WITH_GNOME_PRINT],[1],[Enable GNOME Print Support.])
+ AC_DEFINE([WITH_PRINT],[1],[Enable Print Support.])
+fi
+
+if test x$enable_print = xgtk; then
+ AC_SUBST(GTK_PRINT_CFLAGS)
+ AC_SUBST(GTK_PRINT_LIBS)
+ AC_DEFINE([WITH_GTK_PRINT],[1],[Enable GTK Print Support.])
+ AC_DEFINE([WITH_PRINT],[1],[Enable Print Support.])
+fi
+
+AM_CONDITIONAL(WITH_GNOME_PRINT, test x$enable_print = xgnome)
+AM_CONDITIONAL(WITH_GTK_PRINT, test x$enable_print = xgtk)
+
+
+dnl ========= Check for DBUS
PKG_CHECK_MODULES([DBUS], [dbus-glib-1 >= $DBUS_GLIB_REQUIRED],
[enable_dbus=yes],[enable_dbus=no])
AC_SUBST([DBUS_CFLAGS])
fi
AC_DEFINE([ENABLE_DBUS],[1],[Define if DBUS support is enabled])
-
- DBUS_VERSION=`$PKG_CONFIG --modversion dbus-glib-1 | sed 's/0\.\([[0-9]]*\)\.\{0,1\}\([[0-9]]*\)/\1/'`
- AC_DEFINE_UNQUOTED(DBUS_VERSION, $DBUS_VERSION, [DBUS version.])
fi
-SHELL_CFLAGS="$SHELL_CORE_CFLAGS $DBUS_CFLAGS"
-SHELL_LIBS="$SHELL_CORE_LIBS $DBUS_LIBS -lz"
+LIB_CFLAGS="$LIB_CFLAGS $GNOME_CFLAGS"
+LIB_LIBS="$LIB_LIBS $GNOME_LIBS"
+AC_SUBST(LIB_CFLAGS)
+AC_SUBST(LIB_LIBS)
+
+BACKEND_CFLAGS="$BACKEND_CFLAGS $GNOME_CFLAGS -DGDK_MULTIHEAD_SAFE -DGTK_MULTIHEAD_SAFE"
+BACKEND_LIBS="$BACKEND_LIBS $GNOME_LIBS"
+AC_SUBST(BACKEND_CFLAGS)
+AC_SUBST(BACKEND_LIBS)
+
+SHELL_CFLAGS="$SHELL_CORE_CFLAGS $DBUS_CFLAGS $GNOMEUI_CFLAGS -DGDK_MULTIHEAD_SAFE -DGTK_MULTIHEAD_SAFE"
+SHELL_LIBS="$SHELL_CORE_LIBS $DBUS_LIBS $GNOMEUI_LIBS -lz"
AC_SUBST(SHELL_CFLAGS)
AC_SUBST(SHELL_LIBS)
-FRONTEND_CFLAGS="$FRONTEND_CORE_CFLAGS"
-FRONTEND_LIBS="$FRONTEND_CORE_LIBS -lz"
+FRONTEND_CFLAGS="$FRONTEND_CORE_CFLAGS $GNOME_CFLAGS"
+FRONTEND_LIBS="$FRONTEND_CORE_LIBS $GNOME_LIBS -lz"
AC_SUBST(FRONTEND_CFLAGS)
AC_SUBST(FRONTEND_LIBS)
fi
AM_CONDITIONAL(HAVE_NAUTILUS, test x$HAVE_NAUTILUS = "xyes")
-dnl Check for functions not present in gtk 2.6
-evince_save_LIBS=$LIBS
-LIBS="$LIBS $FRONTEND_CORE_LIBS"
-AC_CHECK_FUNCS(gtk_icon_view_get_visible_range)
-AC_CHECK_FUNCS(gtk_window_present_with_time)
-AC_CHECK_FUNCS(g_file_set_contents)
-LIBS=$evince_save_LIBS
+
+dnl Check for thumbnailer build
+AC_ARG_ENABLE(thumbnailer,
+ AC_HELP_STRING([--disable-thumbnailer],[disable the GNOME thumbnailer]),
+ [case "${enableval}" in
+ yes) ENABLE_THUMBNAILER=yes ;;
+ no) ENABLE_THUMBNAILER=no ;;
+ *) AC_MSG_ERROR(bad value ${enableval} for --enable-thumbnailer) ;;
+ esac],
+ [ENABLE_THUMBNAILER=yes]) dnl Default value
+AM_CONDITIONAL(ENABLE_THUMBNAILER, test x$ENABLE_THUMBNAILER = "xyes")
dnl GConf configuration
AM_GCONF_SOURCE_2
dnl for backtrace()
AC_CHECK_HEADERS([execinfo.h])
-dnl ================== ggv checks ===================================================
-AC_ARG_WITH(gs-pkg,
- [ --with-gs=dir Directory Where GhostScript package is installed.])
-
-if test "x$with_gs" = "x"; then
- AC_PATH_PROG(GS_PROG, gs)
- if test -z "$GS_PROG"; then
- AC_MSG_ERROR(Unable to find GhostScript in the PATH. Provide the full path for GhostScript(--with-gs=PATH). You need to have Ghostscript installed in order to run evince)
- fi
-else
- GS_PROG=$with_gs
+AC_CHECK_DECL([_NL_MEASUREMENT_MEASUREMENT],[
+ AC_DEFINE([HAVE__NL_MEASUREMENT_MEASUREMENT],[1],[Define if _NL_MEASUREMENT_MEASUREMENT is available])
+ ],[],[#include <langinfo.h>])
+
+dnl ================== pdf checks ===================================================
+AC_ARG_ENABLE(pdf,
+ [AC_HELP_STRING([--enable-pdf], [Compile with pdf support])],enable_pdf="$enableval",enable_pdf=yes)
+
+if test "x$enable_pdf" = "xyes"; then
+ POPPLER_REQUIRED=0.6
+ PKG_CHECK_MODULES(POPPLER, poppler-glib >= $POPPLER_REQUIRED,enable_pdf=yes,enable_pdf=no)
+
+ if test "x$enable_pdf" = "xyes"; then
+ AC_DEFINE([ENABLE_PDF], [1], [Enable pdf support.])
+ FRONTEND_LIBS="$FRONTEND_LIBS $POPPLER_LIBS"
+ SHELL_LIBS="$SHELL_LIBS $POPPLER_LIBS"
+ SHELL_CFLAGS="$SHELL_CFLAGS $POPPLER_CFLAGS"
+
+ evince_save_LIBS=$LIBS
+ LIBS="$LIBS $FRONTEND_LIBS"
+ AC_CHECK_FUNCS(poppler_page_render)
+ AC_CHECK_FUNCS(poppler_page_render_for_printing)
+ LIBS=$evince_save_LIBS
+
+ PKG_CHECK_MODULES(CAIRO_PDF, cairo-pdf, enable_cairo_pdf=yes, enable_cairo_pdf=no)
+ if test x$enable_cairo_pdf == xyes; then
+ AC_DEFINE([HAVE_CAIRO_PDF], [1], [defined if cairo-pdf is available])
+ fi
+
+ PKG_CHECK_MODULES(CAIRO_PS, cairo-ps, enable_cairo_ps=yes, enable_cairo_ps=no)
+ if test x$enable_cairo_ps == xyes; then
+ AC_DEFINE([HAVE_CAIRO_PS], [1], [defined if cairo-ps is available])
+ fi
+ else
+ AC_MSG_WARN("PDF support is disabled since poppler-glib library version $POPPLER_REQUIRED or newer not found")
+ fi
fi
-AC_DEFINE_UNQUOTED(GS_PATH, "$GS_PROG", [Path to the 'gs' executable.])
+AM_CONDITIONAL(ENABLE_PDF, test x$enable_pdf = xyes)
+dnl ================== end of pdf checks ============================================
+
+dnl ================== ggv checks ===================================================
+AC_ARG_ENABLE(ps,
+ [AC_HELP_STRING([--disable-ps], [Compile without PostScript backend])],enable_ps=$enableval,enable_ps="yes")
+
+if test x$enable_ps = xyes; then
+ AC_DEFINE([ENABLE_PS], [1], [Enable support for PostScript files.])
+fi
+AM_CONDITIONAL(ENABLE_PS, test x$enable_ps = xyes)
+
+if test x$enable_ps = xyes; then
dnl check for GS version
AC_MSG_CHECKING(for Ghostscript version...)
if test "$GS_VERSION" -lt "7"; then
AC_MSG_ERROR([You need Ghostscript version >= 7 in order to run evince])
fi
-AA_PARMS="-sDEVICE=x11alpha -dNOPLATFONTS"
+
+AC_ARG_WITH(gs-aa-params,
+ [AC_HELP_STRING([--with-gs-aa-params], [Define antialiasing params for ghostscript])],AA_PARAMS=$withval,
+ AA_PARMS="-sDEVICE=x11alpha -dNOPLATFONTS -dGraphicsAlphaBits=4 -dTextAlphaBits=4 -dDOINTERPOLATE"
+ )
AC_DEFINE_UNQUOTED(ALPHA_PARAMS, "$AA_PARMS", [Anti-aliasing parameters for Ghostscript.])
AC_MSG_RESULT(Antialiasing parameters for Ghostscript: $AA_PARMS)
+
+fi
dnl ======================== End of ggv checks =================================
dnl ================== tiff checks ===================================================
dnl ================== djvu checks ===================================================
AC_ARG_ENABLE(djvu,
- [AC_HELP_STRING([--enable-djvu], [Compile with support of djvu viewer])],enable_djvu="$enableval",enable_djvu=no)
+ [AC_HELP_STRING([--enable-djvu], [Compile with support of djvu viewer])],enable_djvu="$enableval",enable_djvu=yes)
if test "x$enable_djvu" = "xyes"; then
- AC_CHECK_HEADERS([libdjvu/ddjvuapi.h],enable_djvu=yes,enable_djvu=no,)
-
- if test "x$enable_djvu" = "xyes"; then
- AC_CHECK_LIB([djvulibre],ddjvu_context_create,enable_djvu=yes,enable_djvu=no,"-lpthread")
- AC_CHECK_LIB([djvulibre],ddjvu_document_get_pageinfo,enable_djvu=yes,enable_djvu=no,"-lpthread")
- fi
+ DJVULIBRE_REQUIRED=3.5.17
+ PKG_CHECK_MODULES(DJVU, ddjvuapi >= $DJVULIBRE_REQUIRED, enable_djvu=yes, enable_djvu=no)
if test "x$enable_djvu" = "xyes"; then
AC_DEFINE([ENABLE_DJVU], [1], [Enable djvu viewer support.])
else
AC_MSG_WARN([
** Djvu support is disabled since a recent version of the djvulibre
-** library was not found. You need at least djvulibre-3.5.15 which
+** library was not found. You need at least djvulibre-3.5.17 which
** can be found on http://djvulibre.djvuzone.org
])
fi
dnl ================== dvi checks ===================================================
AC_ARG_ENABLE(dvi,
- [AC_HELP_STRING([--enable-dvi], [Compile with support of dvi viewer])],enable_dvi="$enableval",enable_dvi=no)
+ [AC_HELP_STRING([--enable-dvi], [Compile with support of dvi viewer])],enable_dvi="$enableval",enable_dvi=yes)
AC_ARG_ENABLE(t1lib,
[AC_HELP_STRING([--enable-t1lib], [Compile with support of t1lib for type1 fonts in dvi])],enable_type1_fonts="$enableval",enable_type1_fonts=no)
dnl ================== comic book checks ===================================================
AC_ARG_ENABLE(comics,
- [AC_HELP_STRING([--enable-comics], [Compile with support for comic book archives])],enable_comics=yes,enable_comics=no)
+ [AC_HELP_STRING([--enable-comics], [Compile with support for comic book archives])],enable_comics="$enableval",enable_comics=yes)
if test "x$enable_comics" = "xyes"; then
AC_DEFINE([ENABLE_COMICS], [1], [Enable support for comics.])
-
fi
AM_CONDITIONAL(ENABLE_COMICS, test x$enable_comics = xyes)
-AC_PATH_PROG(UPDATE_MIME_DB, update-mime-database, no)
-AC_SUBST(UPDATE_MIME_DB)
+dnl ================== End of comic book checks ============================================
-AC_ARG_ENABLE(update-mimedb,
- AC_HELP_STRING([--disable-update-mimedb],
- [disable the update-mime-database after install [default=no]]),,
- enable_update_mimedb=yes)
-AM_CONDITIONAL(ENABLE_UPDATE_MIMEDB, test x$enable_update_mimedb = xyes)
+dnl ================== impress book checks ===================================================
-dnl ================== End of comic book checks ============================================
+AC_ARG_ENABLE(impress,
+ [AC_HELP_STRING([--enable-impress], [Compile with support for impress presentations])],enable_impress="$enableval",enable_impress=no)
+if test "x$enable_impress" = "xyes"; then
+ AC_DEFINE([ENABLE_IMPRESS], [1], [Enable support for impress.])
+fi
+AM_CONDITIONAL(ENABLE_IMPRESS, test x$enable_impress = xyes)
-dnl =================== Mime types list ====================================================
+dnl ================== End of impress book checks ============================================
-EVINCE_MIME_TYPES="application/pdf;application/postscript;application/x-gzpostscript"
+dnl =================== Mime types list ====================================================
+if test "x$enable_pdf" = "xyes" ; then
+ EVINCE_MIME_TYPES="application/pdf;application/x-bzpdf;application/x-gzpdf;"
+fi
+if test "x$enable_ps" = "xyes" ; then
+ EVINCE_MIME_TYPES="${EVINCE_MIME_TYPES}application/postscript;application/x-bzpostscript;application/x-gzpostscript;image/x-eps;image/x-bzeps;image/x-gzeps;"
+fi
if test "x$enable_dvi" = "xyes"; then
- EVINCE_MIME_TYPES="$EVINCE_MIME_TYPES;application/x-dvi"
+ EVINCE_MIME_TYPES="${EVINCE_MIME_TYPES}application/x-dvi;"
fi
if test "x$enable_djvu" = "xyes"; then
- EVINCE_MIME_TYPES="$EVINCE_MIME_TYPES;image/vnd.djvu"
+ EVINCE_MIME_TYPES="${EVINCE_MIME_TYPES}image/vnd.djvu;"
fi
if test "x$enable_tiff" = "xyes"; then
- EVINCE_MIME_TYPES="$EVINCE_MIME_TYPES;image/tiff"
+ EVINCE_MIME_TYPES="${EVINCE_MIME_TYPES}image/tiff;"
fi
if test "x$enable_comics" = "xyes"; then
- EVINCE_MIME_TYPES="$EVINCE_MIME_TYPES;application/cbr;application/cbz"
+ EVINCE_MIME_TYPES="${EVINCE_MIME_TYPES}application/x-cbr;application/x-cbz;"
+fi
+if test "x$enable_pixbuf" = "xyes"; then
+ EVINCE_MIME_TYPES="${EVINCE_MIME_TYPES}image/*;"
+fi
+if test "x$enable_impress" = "xyes"; then
+ EVINCE_MIME_TYPES="${EVINCE_MIME_TYPES}application/vnd.sun.xml.impress;application/vnd.oasis.opendocument.presentation;"
fi
AC_SUBST(EVINCE_MIME_TYPES)
AC_CONFIG_FILES([
-Makefile
+backend/Makefile
+backend/comics/Makefile
+backend/djvu/Makefile
+backend/dvi/Makefile
+backend/dvi/mdvi-lib/Makefile
+backend/impress/Makefile
+backend/pdf/Makefile
+backend/pixbuf/Makefile
+backend/ps/Makefile
+backend/tiff/Makefile
cut-n-paste/Makefile
-cut-n-paste/recent-files/Makefile
-cut-n-paste/zoom-control/Makefile
cut-n-paste/toolbar-editor/Makefile
-data/Makefile
+cut-n-paste/zoom-control/Makefile
+cut-n-paste/totem-screensaver/Makefile
data/evince.desktop.in
-lib/Makefile
-pdf/Makefile
-pixbuf/Makefile
-tiff/Makefile
-ps/Makefile
-djvu/Makefile
-dvi/Makefile
-dvi/mdvi-lib/Makefile
-comics/Makefile
+data/Makefile
+data/icons/Makefile
+data/icons/16x16/Makefile
+data/icons/16x16/apps/Makefile
+data/icons/16x16/actions/Makefile
+data/icons/22x22/Makefile
+data/icons/22x22/apps/Makefile
+data/icons/22x22/actions/Makefile
+data/icons/24x24/Makefile
+data/icons/24x24/apps/Makefile
+data/icons/24x24/actions/Makefile
+data/icons/32x32/Makefile
+data/icons/32x32/actions/Makefile
+data/icons/48x48/Makefile
+data/icons/48x48/apps/Makefile
+data/icons/48x48/actions/Makefile
+data/icons/scalable/Makefile
+data/icons/scalable/apps/Makefile
+help/Makefile
+help/reference/Makefile
+help/reference/version.xml
+libdocument/Makefile
+Makefile
po/Makefile.in
-backend/Makefile
properties/Makefile
shell/Makefile
+test/Makefile
thumbnailer/Makefile
-help/Makefile
])
AC_OUTPUT
+
+echo "
+Configure summary:
+ GNOME Support......: $WITH_GNOME
+ Print Support......: $enable_print
+ DBUS Support.......: $enable_dbus
+ Nautilus Plugin....: $HAVE_NAUTILUS
+ Thumbnailer........: $ENABLE_THUMBNAILER
+ Gtk-Doc Support....: $enable_gtk_doc
+
+ PDF Backend........: $enable_pdf
+ PostScript Backend.: $enable_ps
+ TIFF Backend.......: $enable_tiff
+ DJVU Backend.......: $enable_djvu
+ DVI Backend........: $enable_dvi
+ Pixbuf Backend.....: $enable_pixbuf
+ Comics Backend.....: $enable_comics
+ Impress Backend....: $enable_impress
+"
https://www.fi.muni.cz/~kas/git / evince.git / blobdiff