From 246ac684e4909249d54d265ae07620eb40840a44 Mon Sep 17 00:00:00 2001
From: Moazin Khatti <moazinkhatri@gmail.com>
Date: Sun, 21 Jul 2019 11:39:10 +0500
Subject: [PATCH] Plug in a default library. `librsvg' for now.

---
 builds/unix/configure.raw          | 53 ++++++++++++++++++++++++++++--
 include/freetype/config/ftoption.h |  2 ++
 src/svg/ftsvg.c                    |  9 +++++
 src/svg/rules.mk                   | 14 +++++++-
 4 files changed, 74 insertions(+), 4 deletions(-)

diff --git a/builds/unix/configure.raw b/builds/unix/configure.raw
index a1a6dbeb2..90bec4233 100644
--- a/builds/unix/configure.raw
+++ b/builds/unix/configure.raw
@@ -542,6 +542,40 @@ if test x"$with_harfbuzz" = xyes -a "$have_harfbuzz" = no; then
   AC_MSG_ERROR([harfbuzz support requested but library not found])
 fi
 
+# OT-SVG checks
+# Librsvg is the default for now!
+AC_ARG_WITH([svg],
+  [AS_HELP_STRING([--with-svg=@<:@yes|no|auto@:>@],
+                  [support OpenType SVG fonts @<:@default=auto@:>@])],
+  [], [with_svg=auto])
+
+have_librsvg=no
+if test x"$with_svg" = xyes -o x"$with_svg"=xauto; then
+  librsvg_pkg="librsvg-2.0 >= 2.40.0"
+  have_librsvg_pkg=no
+
+  if test x"$LIBRSVG_CFLAGS" = x -a x"$LIBRSVG_LIBS" = x; then
+    PKG_CHECK_EXISTS([$librsvg_pkg], [have_librsvg_pkg=yes])
+  fi
+  PKG_CHECK_MODULES([LIBRSVG], [$librsvg_pkg],
+                    [have_librsvg="yes (pkg-config)"], [:])
+
+  if test $have_librsvg_pkg = yes; then
+    # we have librsvg pkg-config file
+    librsvg_reqpriv="$librsvg_pkg"
+    librsvg_libspriv=
+    librsvg_libsstaticconf=`$PKG_CONFIG --static --libs "$librsvg_pkg"`
+  else
+    librsvg_reqpriv=
+
+    if test "$have_librsvg" != no; then
+      # LIBRSVG_CFLAGS and LIBRSVG_LIBS are set by the user
+      librsvg_libspriv="$LIBRSVG_LIBS"
+      librsvg_libsstaticconf="$LIBRSVG_LIBS"
+      have_librsvg="yes (LIBRSVG_CFLAGS and LIBRSVG_LIBS)"
+    fi
+  fi
+fi
 
 # check for librt
 #
@@ -992,7 +1026,8 @@ fi
 REQUIRES_PRIVATE="$zlib_reqpriv,     \
                   $bzip2_reqpriv,    \
                   $libpng_reqpriv,   \
-                  $harfbuzz_reqpriv"
+                  $harfbuzz_reqpriv, \
+                  $librsvg_reqpriv"
 # beautify
 REQUIRES_PRIVATE=`echo "$REQUIRES_PRIVATE" \
                   | sed -e 's/^  *//'      \
@@ -1007,7 +1042,8 @@ LIBS_PRIVATE="$zlib_libspriv     \
               $bzip2_libspriv    \
               $libpng_libspriv   \
               $harfbuzz_libspriv \
-              $ft2_extra_libs"
+              $ft2_extra_libs    \
+              $librsvg_libspriv"
 # beautify
 LIBS_PRIVATE=`echo "$LIBS_PRIVATE"  \
               | sed -e 's/^  *//'   \
@@ -1019,7 +1055,9 @@ LIBSSTATIC_CONFIG="-lfreetype               \
                    $bzip2_libsstaticconf    \
                    $libpng_libsstaticconf   \
                    $harfbuzz_libsstaticconf \
-                   $ft2_extra_libs"
+                   $ft2_extra_libs          \
+                   $librsvg_libsstaticconf"
+
 # remove -L/usr/lib and -L/usr/lib64 since `freetype-config' adds them later
 # on if necessary; also beautify
 LIBSSTATIC_CONFIG=`echo "$LIBSSTATIC_CONFIG"          \
@@ -1084,6 +1122,15 @@ else
   ftoption_unset FT_CONFIG_OPTION_USE_HARFBUZZ
 fi
 
+if test "$have_librsvg" != no; then
+  LIBRSVG_CFLAGS=$(echo $LIBRSVG_CFLAGS | sed -e 's/-I\(.*\?\)freetype2//g')
+  CFLAGS="$CFLAGS $LIBRSVG_CFLAGS"
+  LDFLAGS="$LDFLAGS $LIBRSVG_LIBS"
+  ftoption_set FT_CONFIG_OPTION_SVG_DEFAULT
+else
+  ftoption_unset FT_CONFIG_OPTION_SVG_DEFAULT
+fi
+
 AC_SUBST([CFLAGS])
 AC_SUBST([LDFLAGS])
 
diff --git a/include/freetype/config/ftoption.h b/include/freetype/config/ftoption.h
index 1a375248d..6d5739159 100644
--- a/include/freetype/config/ftoption.h
+++ b/include/freetype/config/ftoption.h
@@ -501,6 +501,8 @@ FT_BEGIN_HEADER
    */
 #define FT_CONFIG_OPTION_SVG
 
+/* #define FT_CONFIG_OPTION_SVG_DEFAULT */
+
 
   /**************************************************************************
    *
diff --git a/src/svg/ftsvg.c b/src/svg/ftsvg.c
index 0486b74c3..5c9d081a3 100644
--- a/src/svg/ftsvg.c
+++ b/src/svg/ftsvg.c
@@ -21,6 +21,9 @@
 #include FT_SVG_RENDER_H
 #include FT_BBOX_H
 
+#ifdef FT_CONFIG_OPTION_SVG_DEFAULT
+#include <rsvg_port.h>
+#endif
 #include <stdio.h>
 
 #include "ftsvg.h"
@@ -31,6 +34,12 @@
   {
     FT_Error    error = FT_Err_Ok;
     svg_module->loaded = FALSE;
+#ifdef FT_CONFIG_OPTION_SVG_DEFAULT
+    svg_module->hooks.init_svg = (SVG_Lib_Init_Func)rsvg_port_init;
+    svg_module->hooks.free_svg = (SVG_Lib_Free_Func)rsvg_port_free;
+    svg_module->hooks.render_svg = (SVG_Lib_Render_Func)rsvg_port_render;
+    svg_module->hooks.get_buffer_size = (SVG_Lib_Get_Buffer_Size_Func)rsvg_port_get_buffer_size;
+#endif
     return error;
   }
 
diff --git a/src/svg/rules.mk b/src/svg/rules.mk
index 427580fc1..c5e5ed95a 100644
--- a/src/svg/rules.mk
+++ b/src/svg/rules.mk
@@ -21,9 +21,13 @@ SVG_DIR := $(SRC_DIR)/svg
 #
 SVG_COMPILE := $(CC) $(ANSIFLAGS)                               \
                         $I$(subst /,$(COMPILER_SEP),$(SVG_DIR)) \
-                        $(INCLUDE_FLAGS)                           \
+                        $(INCLUDE_FLAGS)                        \
                         $(FT_CFLAGS)
 
+SVG_PORT_COMPILE := $(CC) \
+                        $I$(subst /,$(COMPILER_SEP),$(SVG_DIR)) \
+			$(INCLUDE_FLAGS)                        \
+			$(FT_CFLAGS)
 
 # raster driver sources (i.e., C files)
 #
@@ -52,6 +56,13 @@ SVG_DRV_SRC_S := $(SVG_DIR)/svg.c
 
 # raster driver - single object
 #
+
+SVG_PORT_SRC_S := $(SVG_DIR)/rsvg_port.c
+SVG_PORT_OBJ_S := $(OBJ_DIR)/rsvg_port.$O
+
+$(SVG_PORT_OBJ_S): $(SVG_PORT_SRC_S) $(FREETYPE_H)
+	$(SVG_PORT_COMPILE) $T$(subst /,$(COMPILER_SEP), $@ $(SVG_PORT_SRC_S))
+
 $(SVG_DRV_OBJ_S): $(SVG_DRV_SRC_S) $(SVG_DRV_SRC) \
                      $(FREETYPE_H) $(SVG_DRV_H)
 	$(SVG_COMPILE) $T$(subst /,$(COMPILER_SEP),$@ $(SVG_DRV_SRC_S))
@@ -68,5 +79,6 @@ $(OBJ_DIR)/%.$O: $(SVG_DIR)/%.c $(FREETYPE_H) $(SVG_DRV_H)
 DRV_OBJS_S += $(SVG_DRV_OBJ_S)
 DRV_OBJS_M += $(SVG_DRV_OBJ_M)
 
+DRV_OBJS_S += $(SVG_PORT_OBJ_S)
 
 # EOF