From: Khaled Hosny <khaledhosny@eglug.org>
Date: Tue, 5 Jun 2018 10:12:26 +0000 (+0200)
Subject: Add support for building with HarfBuzz
X-Git-Tag: emacs-27.0.90~2671^2~59
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=ab93444cbbd06096cdf33a7a76d8e6ee6c37c04a;p=emacs.git

Add support for building with HarfBuzz

Not used yet.
---

diff --git a/configure.ac b/configure.ac
index 8b34c3b6581..3c671b546a8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -358,6 +358,7 @@ OPTION_DEFAULT_ON([imagemagick],[don't compile with ImageMagick image support])
 OPTION_DEFAULT_ON([json], [don't compile with native JSON support])
 
 OPTION_DEFAULT_ON([xft],[don't use XFT for anti aliased fonts])
+OPTION_DEFAULT_OFF([harfbuzz],[use HarfBuzz for text shaping (experimental)])
 OPTION_DEFAULT_ON([libotf],[don't use libotf for OpenType font support])
 OPTION_DEFAULT_ON([m17n-flt],[don't use m17n-flt for text shaping])
 
@@ -3307,10 +3308,24 @@ if test "${HAVE_X11}" = "yes"; then
        test "$HAVE_FREETYPE" = "no" && AC_MSG_ERROR(libxft requires libfreetype)
     fi
 
+    HAVE_HARFBUZZ=no
     HAVE_LIBOTF=no
     if test "${HAVE_FREETYPE}" = "yes"; then
       AC_DEFINE(HAVE_FREETYPE, 1,
 		[Define to 1 if using the freetype and fontconfig libraries.])
+      if test "${with_harfbuzz}" != "no"; then
+	EMACS_CHECK_MODULES([HARFBUZZ], [harfbuzz])
+	if test "$HAVE_HARFBUZZ" = "yes"; then
+	  AC_DEFINE(HAVE_HARFBUZZ, 1, [Define to 1 if using HarfBuzz.])
+	  AC_CHECK_LIB(harfbuzz, hb_ft_font_create_referenced,
+		       HAVE_HB_FT_FONT_CREATE_REFERENCED=yes,
+		       HAVE_HB_FT_FONT_CREATE_REFERENCED=no)
+	  if test "${HAVE_HB_FT_FONT_CREATE_REFERENCED}" = "yes"; then
+	    AC_DEFINE(HAVE_HB_FT_FONT_CREATE_REFERENCED, 1,
+		      [Define to 1 if HarfBuzz has hb_ft_font_create_referenced.])
+	  fi
+	fi
+      fi
       if test "${with_libotf}" != "no"; then
 	EMACS_CHECK_MODULES([LIBOTF], [libotf])
 	if test "$HAVE_LIBOTF" = "yes"; then
@@ -3344,6 +3359,7 @@ if test "${HAVE_X11}" = "yes"; then
 else
     HAVE_XFT=no
     HAVE_FREETYPE=no
+    HAVE_HARFBUZZ=no
     HAVE_LIBOTF=no
     HAVE_M17N_FLT=no
 fi
@@ -3354,6 +3370,8 @@ AC_SUBST(FREETYPE_CFLAGS)
 AC_SUBST(FREETYPE_LIBS)
 AC_SUBST(FONTCONFIG_CFLAGS)
 AC_SUBST(FONTCONFIG_LIBS)
+AC_SUBST(HARFBUZZ_CFLAGS)
+AC_SUBST(HARFBUZZ_LIBS)
 AC_SUBST(LIBOTF_CFLAGS)
 AC_SUBST(LIBOTF_LIBS)
 AC_SUBST(M17N_FLT_CFLAGS)
@@ -5461,7 +5479,7 @@ Configured for '${canonical}'.
 optsep=
 emacs_config_features=
 for opt in XAW3D XPM JPEG TIFF GIF PNG RSVG CAIRO IMAGEMAGICK SOUND GPM DBUS \
-  GCONF GSETTINGS GLIB NOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT \
+  GCONF GSETTINGS GLIB NOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE HARFBUZZ M17N_FLT \
   LIBOTF XFT ZLIB TOOLKIT_SCROLL_BARS X_TOOLKIT OLDXMENU X11 XDBE XIM \
   NS MODULES THREADS XWIDGETS LIBSYSTEMD JSON CANNOT_DUMP LCMS2 GMP; do
 
@@ -5520,6 +5538,7 @@ AS_ECHO(["  Does Emacs use -lXaw3d?                                 ${HAVE_XAW3D
   Does Emacs use -lgnutls?                                ${HAVE_GNUTLS}
   Does Emacs use -lxml2?                                  ${HAVE_LIBXML2}
   Does Emacs use -lfreetype?                              ${HAVE_FREETYPE}
+  Does Emacs use HarfBuzz?                                ${HAVE_HARFBUZZ}
   Does Emacs use -lm17n-flt?                              ${HAVE_M17N_FLT}
   Does Emacs use -lotf?                                   ${HAVE_LIBOTF}
   Does Emacs use -lxft?                                   ${HAVE_XFT}
diff --git a/src/Makefile.in b/src/Makefile.in
index 6b2e54a1602..a8fa5c372f4 100644
--- a/src/Makefile.in
+++ b/src/Makefile.in
@@ -133,6 +133,8 @@ FONTCONFIG_CFLAGS = @FONTCONFIG_CFLAGS@
 FONTCONFIG_LIBS = @FONTCONFIG_LIBS@
 FREETYPE_CFLAGS = @FREETYPE_CFLAGS@
 FREETYPE_LIBS = @FREETYPE_LIBS@
+HARFBUZZ_CFLAGS = @HARFBUZZ_CFLAGS@
+HARFBUZZ_LIBS = @HARFBUZZ_LIBS@
 LIBOTF_CFLAGS = @LIBOTF_CFLAGS@
 LIBOTF_LIBS = @LIBOTF_LIBS@
 M17N_FLT_CFLAGS = @M17N_FLT_CFLAGS@
@@ -370,7 +372,7 @@ EMACS_CFLAGS=-Demacs $(MYCPPFLAGS) -I. -I$(srcdir) \
   $(XRANDR_CFLAGS) $(XINERAMA_CFLAGS) $(XFIXES_CFLAGS) $(XDBE_CFLAGS) \
   $(WEBKIT_CFLAGS) $(LCMS2_CFLAGS) \
   $(SETTINGS_CFLAGS) $(FREETYPE_CFLAGS) $(FONTCONFIG_CFLAGS) \
-  $(LIBOTF_CFLAGS) $(M17N_FLT_CFLAGS) $(DEPFLAGS) \
+  $(HARFBUZZ_CFLAGS) $(LIBOTF_CFLAGS) $(M17N_FLT_CFLAGS) $(DEPFLAGS) \
   $(LIBSYSTEMD_CFLAGS) $(JSON_CFLAGS) \
   $(LIBGNUTLS_CFLAGS) $(NOTIFY_CFLAGS) $(CAIRO_CFLAGS) \
   $(WERROR_CFLAGS)
@@ -500,7 +502,7 @@ LIBES = $(LIBS) $(W32_LIBS) $(LIBS_GNUSTEP) $(LIBX_BASE) $(LIBIMAGE) \
    $(XDBE_LIBS) \
    $(LIBXML2_LIBS) $(LIBGPM) $(LIBS_SYSTEM) $(CAIRO_LIBS) \
    $(LIBS_TERMCAP) $(GETLOADAVG_LIBS) $(SETTINGS_LIBS) $(LIBSELINUX_LIBS) \
-   $(FREETYPE_LIBS) $(FONTCONFIG_LIBS) $(LIBOTF_LIBS) $(M17N_FLT_LIBS) \
+   $(FREETYPE_LIBS) $(FONTCONFIG_LIBS) $(HARFBUZZ_LIBS) $(LIBOTF_LIBS) $(M17N_FLT_LIBS) \
    $(LIBGNUTLS_LIBS) $(LIB_PTHREAD) $(GETADDRINFO_A_LIBS) $(LCMS2_LIBS) \
    $(NOTIFY_LIBS) $(LIB_MATH) $(LIBZ) $(LIBMODULES) $(LIBSYSTEMD_LIBS) \
    $(JSON_LIBS) $(GMP_LIB)