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-rw-r--r--src/sfnt/sfobjs.c51
1 files changed, 39 insertions, 12 deletions
diff --git a/src/sfnt/sfobjs.c b/src/sfnt/sfobjs.c
index de030ea..ceeae20 100644
--- a/src/sfnt/sfobjs.c
+++ b/src/sfnt/sfobjs.c
@@ -4,7 +4,7 @@
/* */
/* SFNT object management (base). */
/* */
-/* Copyright 1996-2015 by */
+/* Copyright 1996-2016 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
@@ -949,6 +949,10 @@
instance_size * num_instances > fvar_len )
num_instances = 0;
+ /* we don't support Multiple Master CFFs yet */
+ if ( !face->goto_table( face, TTAG_CFF, stream, 0 ) )
+ num_instances = 0;
+
/* we support at most 2^15 - 1 instances */
if ( num_instances >= ( 1U << 15 ) - 1 )
{
@@ -973,7 +977,7 @@
#endif
face->root.num_faces = face->ttc_header.count;
- face->root.face_index = face_index;
+ face->root.face_index = face_instance_index;
return error;
}
@@ -1407,7 +1411,7 @@
* depths in the FT_Bitmap_Size record. This is a design error.
*/
{
- FT_UInt i, count;
+ FT_UInt count;
count = face->sbit_num_strikes;
@@ -1419,6 +1423,9 @@
FT_Short avgwidth = face->os2.xAvgCharWidth;
FT_Size_Metrics metrics;
+ FT_UInt* sbit_strike_map = NULL;
+ FT_UInt strike_idx, bsize_idx;
+
if ( em_size == 0 || face->os2.version == 0xFFFFU )
{
@@ -1426,31 +1433,50 @@
em_size = 1;
}
- if ( FT_NEW_ARRAY( root->available_sizes, count ) )
+ /* to avoid invalid strike data in the `available_sizes' field */
+ /* of `FT_Face', we map `available_sizes' indices to strike */
+ /* indices */
+ if ( FT_NEW_ARRAY( root->available_sizes, count ) ||
+ FT_NEW_ARRAY( sbit_strike_map, count ) )
goto Exit;
- for ( i = 0; i < count; i++ )
+ bsize_idx = 0;
+ for ( strike_idx = 0; strike_idx < count; strike_idx++ )
{
- FT_Bitmap_Size* bsize = root->available_sizes + i;
+ FT_Bitmap_Size* bsize = root->available_sizes + bsize_idx;
- error = sfnt->load_strike_metrics( face, i, &metrics );
+ error = sfnt->load_strike_metrics( face, strike_idx, &metrics );
if ( error )
- goto Exit;
+ continue;
bsize->height = (FT_Short)( metrics.height >> 6 );
- bsize->width = (FT_Short)(
- ( avgwidth * metrics.x_ppem + em_size / 2 ) / em_size );
+ bsize->width = (FT_Short)(
+ ( avgwidth * metrics.x_ppem + em_size / 2 ) / em_size );
bsize->x_ppem = metrics.x_ppem << 6;
bsize->y_ppem = metrics.y_ppem << 6;
/* assume 72dpi */
bsize->size = metrics.y_ppem << 6;
+
+ /* only use strikes with valid PPEM values */
+ if ( bsize->x_ppem && bsize->y_ppem )
+ sbit_strike_map[bsize_idx++] = strike_idx;
}
- root->face_flags |= FT_FACE_FLAG_FIXED_SIZES;
- root->num_fixed_sizes = (FT_Int)count;
+ /* reduce array size to the actually used elements */
+ (void)FT_RENEW_ARRAY( sbit_strike_map, count, bsize_idx );
+
+ /* from now on, all strike indices are mapped */
+ /* using `sbit_strike_map' */
+ if ( bsize_idx )
+ {
+ face->sbit_strike_map = sbit_strike_map;
+
+ root->face_flags |= FT_FACE_FLAG_FIXED_SIZES;
+ root->num_fixed_sizes = (FT_Int)bsize_idx;
+ }
}
}
@@ -1644,6 +1670,7 @@
/* freeing sbit size table */
FT_FREE( face->root.available_sizes );
+ FT_FREE( face->sbit_strike_map );
face->root.num_fixed_sizes = 0;
FT_FREE( face->postscript_name );