[autofit] Add wrapper function for `FT_Get_Char_Index'.

Yet-to-come changes will provide HarfBuzz functionality for the new
function.

* src/autofit/hbshim.c (af_get_char_index): New function.
* src/autofit/hbshim.h: Updated.

* src/autofit/afcjk.c (af_cjk_metrics_init_widths,
af_cjk_metrics_init_blues, af_cjk_metrics_check_digits): Updated.

* src/autofit/aflatin.c (af_latin_metrics_init_widths,
af_latin_metrics_init_blues, af_latin_metrics_check_digits):
Updated.

ChangeLog

@@ -1,3 +1,20 @@
+2013-12-28  Werner Lemberg  <wl@gnu.org>
+
+	[autofit] Add wrapper function for `FT_Get_Char_Index'.
+
+	Yet-to-come changes will provide HarfBuzz functionality for the new
+	function.
+
+	* src/autofit/hbshim.c (af_get_char_index): New function.
+	* src/autofit/hbshim.h: Updated.
+
+	* src/autofit/afcjk.c (af_cjk_metrics_init_widths,
+	af_cjk_metrics_init_blues, af_cjk_metrics_check_digits): Updated.
+
+	* src/autofit/aflatin.c (af_latin_metrics_init_widths,
+	af_latin_metrics_init_blues, af_latin_metrics_check_digits):
+	Updated.
+
 2013-12-28  Werner Lemberg  <wl@gnu.org>
 
 	[autofit] Use `global' HarfBuzz font object.

src/autofit/afcjk.c

@@ -101,7 +101,8 @@
                                        [style_class->script];
 
 
-      glyph_index = FT_Get_Char_Index( face, script_class->standard_char );
+      glyph_index = af_get_char_index( &metrics->root,
+                                       script_class->standard_char );
       if ( glyph_index == 0 )
         goto Exit;
 
@@ -297,7 +298,7 @@
         GET_UTF8_CHAR( ch, p );
 
         /* load the character in the face -- skip unknown or empty ones */
-        glyph_index = FT_Get_Char_Index( face, ch );
+        glyph_index = af_get_char_index( &metrics->root, ch );
         if ( glyph_index == 0 )
         {
           FT_TRACE5(( "  U+%04lX unavailable\n", ch ));
@@ -479,7 +480,7 @@
       FT_UInt  glyph_index;
 
 
-      glyph_index = FT_Get_Char_Index( face, i );
+      glyph_index = af_get_char_index( &metrics->root, i );
       if ( glyph_index == 0 )
         continue;
 

src/autofit/aflatin.c

@@ -88,7 +88,8 @@
                                        [style_class->script];
 
 
-      glyph_index = FT_Get_Char_Index( face, script_class->standard_char );
+      glyph_index = af_get_char_index( &metrics->root,
+                                       script_class->standard_char );
       if ( glyph_index == 0 )
         goto Exit;
 
@@ -296,7 +297,7 @@
         GET_UTF8_CHAR( ch, p );
 
         /* load the character in the face -- skip unknown or empty ones */
-        glyph_index = FT_Get_Char_Index( face, ch );
+        glyph_index = af_get_char_index( &metrics->root, ch );
         if ( glyph_index == 0 )
         {
           FT_TRACE5(( "  U+%04lX unavailable\n", ch ));
@@ -745,7 +746,7 @@
       FT_UInt  glyph_index;
 
 
-      glyph_index = FT_Get_Char_Index( face, i );
+      glyph_index = af_get_char_index( &metrics->root, i );
       if ( glyph_index == 0 )
         continue;
 

src/autofit/hbshim.c

@@ -267,6 +267,22 @@
   }
 
 
+  FT_UInt
+  af_get_char_index( AF_StyleMetrics  metrics,
+                     FT_ULong         charcode )
+  {
+    FT_Face  face;
+
+
+    if ( !metrics )
+      return FT_THROW( Invalid_Argument );
+
+    face = metrics->globals->face;
+
+    return FT_Get_Char_Index( face, charcode );
+  }
+
+
 #if 0
   /* to be always excluded */
   COVERAGE(nalt, 'n', 'a', 'l', 't'); /* Alternate Annotation Forms (?) */
@@ -274,7 +290,27 @@
   /* COVERAGE(ruby, 'r', 'u', 'b', 'y') */ /* (only for Japanese) */
 #endif
 
-#endif /* FT_CONFIG_OPTION_USE_HARFBUZZ */
+
+#else /* !FT_CONFIG_OPTION_USE_HARDBUZZ */
+
+
+  FT_UInt
+  af_get_char_index( AF_StyleMetrics  metrics,
+                     FT_ULong         charcode )
+  {
+    FT_Face  face;
+
+
+    if ( !metrics )
+      return FT_THROW( Invalid_Argument );
+
+    face = metrics->globals->face;
+
+    return FT_Get_Char_Index( face, charcode );
+  }
+
+
+#endif /* !FT_CONFIG_OPTION_USE_HARFBUZZ */
 
 
 /* END */

src/autofit/hbshim.h

@@ -38,12 +38,22 @@ FT_BEGIN_HEADER
                    AF_StyleClass   style_class,
                    FT_Byte*        gstyles );
 
+  FT_UInt
+  af_get_char_index( AF_StyleMetrics  metrics,
+                     FT_ULong         charcode );
+
  /* */
 
 FT_END_HEADER
 
 
-#endif /* FT_CONFIG_OPTION_USE_HARFBUZZ */
+#else /* !FT_CONFIG_OPTION_USE_HARFBUZZ */
+
+  FT_UInt
+  af_get_char_index( AF_StyleMetrics  metrics,
+                     FT_ULong         charcode );
+
+#endif /* !FT_CONFIG_OPTION_USE_HARFBUZZ */
 
 #endif /* __HBSHIM_H__ */