[Devel] [BUG] We cannot handle face_index using OTC/TTC fonts

[Chisato Yamauchi]

  Hello,

  I found a serious bug.  The freetype-2.1.8rc1 cannot
use 0<face_index of OTC/TTC fonts. When face_index==0, 
the font is displayed.  But tt_face_load_sfnt_header() 
returns an error when face_index!=0.

  I attach a patch for the bug.

------------------------------------------------------------
    Chisato Yamauchi

--- xc/extras/freetype-2.1.8rc1._orig_/src/sfnt/ttload.c        2004-04-02 
05:35:35.000000000 +0900
+++ xc/extras/freetype2/src/sfnt/ttload.c       2004-04-18 19:52:49.000000000 
+0900
@@ -276,7 +276,7 @@
                             SFNT_Header  sfnt )
   {
     FT_Error   error;
-    FT_ULong   format_tag, offset;
+    FT_ULong   font_format_tag, format_tag, offset;
     FT_Memory  memory = stream->memory;
 
     static const FT_Frame_Field  sfnt_header_fields[] =
@@ -318,10 +318,10 @@
     /*                                                                    */
     offset = FT_STREAM_POS();
 
-    if ( FT_READ_ULONG( format_tag ) )
+    if ( FT_READ_ULONG( font_format_tag ) )
       goto Exit;
 
-    if ( format_tag == TTAG_ttcf )
+    if ( font_format_tag == TTAG_ttcf )
     {
       FT_Int  n;
 
@@ -375,7 +375,7 @@
     }
 
     /* disallow face index values > 0 for non-TTC files */
-    if ( format_tag != TTAG_ttcf && face_index > 0 )
+    if ( font_format_tag != TTAG_ttcf && face_index > 0 )
       error = SFNT_Err_Bad_Argument;
 
   Exit: