* include/freetype/freetype.h (FT_LOAD_ADVANCE_ONLY): Use value

ChangeLog

@@ -1,3 +1,23 @@
+2008-12-05  Werner Lemberg  <wl@nu.org>
+
+	* include/freetype/freetype.h (FT_LOAD_ADVANCE_ONLY): Use value
+	0x100 instead of 0x10000; the latter value is already occupied by
+	FT_LOAD_TARGET_LIGHT.  Bug reported by James Cloos.
+
+
+	Handle SFNT with neither outlines nor bitmaps.  This fixes Savannah
+	bug #25010.
+
+	* src/base/ftobjs.c (FT_Load_Glyph): Reject fonts with neither
+	outlines nor bitmaps.
+
+	* src/sfnt/sfobjs.c (sfnt_load_face): Don't return an error if there
+	is no table with glyphs.
+
+
+	* src/sfnt/ttload.c (tt_face_lookup_table): Improve debugging
+	message.
+
 2008-12-01  Werner Lemberg  <wl@gnu.org>
 
 	GDEF tables need `glyph_count' too for validation.  Problem reported

include/freetype/freetype.h

@@ -2429,11 +2429,11 @@ FT_BEGIN_HEADER
 #define FT_LOAD_MONOCHROME                   0x1000
 #define FT_LOAD_LINEAR_DESIGN                0x2000
 #define FT_LOAD_NO_AUTOHINT                  0x8000U
-#define FT_LOAD_ADVANCE_ONLY                 0x10000UL
 
   /* */
 
   /* used internally only by certain font drivers! */
+#define FT_LOAD_ADVANCE_ONLY                 0x100
 #define FT_LOAD_SBITS_ONLY                   0x4000
 
 

src/base/ftobjs.c

@@ -559,6 +559,10 @@
     if ( !face || !face->size || !face->glyph )
       return FT_Err_Invalid_Face_Handle;
 
+    /* fonts with neither outlines nor bitmaps can be found in PDFs */
+    if ( !FT_IS_SCALABLE( face ) && !FT_HAS_FIXED_SIZES( face ) )
+      return FT_Err_Invalid_Glyph_Index;
+
     /* The validity test for `glyph_index' is performed by the */
     /* font drivers.                                           */
 
@@ -702,7 +706,7 @@
 
     /* compute the linear advance in 16.16 pixels */
     if ( ( load_flags & FT_LOAD_LINEAR_DESIGN ) == 0  &&
-         ( face->face_flags & FT_FACE_FLAG_SCALABLE ) )
+         ( FT_IS_SCALABLE( face ) )                   )
     {
       FT_Size_Metrics*  metrics = &face->size->metrics;
 

src/sfnt/sfobjs.c

@@ -680,19 +680,20 @@
 
         face->os2.version = 0xFFFFU;
       }
-
     }
 
     /* the optional tables */
 
-    /* embedded bitmap support. */
+    /* embedded bitmap support */
     if ( sfnt->load_eblc )
     {
       LOAD_( eblc );
       if ( error )
       {
-        /* return an error if this font file has no outlines */
-        if ( error == SFNT_Err_Table_Missing && has_outline )
+        /* a font which contains neither bitmaps nor outlines is */
+        /* still valid (although rather useless in most cases);  */
+        /* however, you can find such stripped fonts in PDFs     */
+        if ( error == SFNT_Err_Table_Missing )
           error = SFNT_Err_Ok;
         else
           goto Exit;

src/sfnt/ttload.c

@@ -58,6 +58,9 @@
   {
     TT_Table  entry;
     TT_Table  limit;
+#ifdef FT_DEBUG_LEVEL_TRACE
+    FT_Bool   zero_length = FALSE;
+#endif
 
 
     FT_TRACE4(( "tt_face_lookup_table: %08p, `%c%c%c%c' -- ",
@@ -72,17 +75,28 @@
 
     for ( ; entry < limit; entry++ )
     {
-      /* For compatibility with Windows, we consider 0-length */
-      /* tables the same as missing tables.                   */
-      if ( entry->Tag == tag && entry->Length != 0 )
-      {
-        FT_TRACE4(( "found table.\n" ));
-        return entry;
+      /* For compatibility with Windows, we consider    */
+      /* zero-length tables the same as missing tables. */
+      if ( entry->Tag == tag ) {
+        if ( entry->Length != 0 )
+        {
+          FT_TRACE4(( "found table.\n" ));
+          return entry;
+        }
+#ifdef FT_DEBUG_LEVEL_TRACE
+        zero_length = TRUE;
+#endif
       }
     }
 
-    FT_TRACE4(( "could not find table!\n" ));
-    return 0;
+#ifdef FT_DEBUG_LEVEL_TRACE
+    if ( zero_length )
+      FT_TRACE4(( "ignoring empty table!\n" ));
+    else
+      FT_TRACE4(( "could not find table!\n" ));
+#endif
+
+    return NULL;
   }
 
 

src/tools/ftrandom/ftrandom.c

@@ -1,4 +1,4 @@
-/* Copyright (C) 2005 by George Williams */
+/* Copyright (C) 2005, 2007, 2008 by George Williams */
 /*
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
@@ -151,8 +151,8 @@
     int  load_flags = FT_LOAD_DEFAULT;
 
 
-    if ( check_outlines                               &&
-         ( face->face_flags & FT_FACE_FLAG_SCALABLE ) )
+    if ( check_outlines         &&
+         FT_IS_SCALABLE( face ) )
       load_flags = FT_LOAD_NO_BITMAP;
 
     if ( nohints )
@@ -162,8 +162,8 @@
 
     for ( gid = 0; gid < face->num_glyphs; ++gid )
     {
-      if ( check_outlines                               &&
-           ( face->face_flags & FT_FACE_FLAG_SCALABLE ) )
+      if ( check_outlines         &&
+           FT_IS_SCALABLE( face ) )
       {
         if ( !FT_Load_Glyph( face, gid, load_flags ) )
           FT_Outline_Decompose( &face->glyph->outline, &outlinefuncs, NULL );