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Diffstat (limited to 'src/3rdparty/freetype/src/sfnt/sfobjs.c')
-rw-r--r--src/3rdparty/freetype/src/sfnt/sfobjs.c437
1 files changed, 319 insertions, 118 deletions
diff --git a/src/3rdparty/freetype/src/sfnt/sfobjs.c b/src/3rdparty/freetype/src/sfnt/sfobjs.c
index 14d3adef21..6ba8509f56 100644
--- a/src/3rdparty/freetype/src/sfnt/sfobjs.c
+++ b/src/3rdparty/freetype/src/sfnt/sfobjs.c
@@ -4,7 +4,7 @@
/* */
/* SFNT object management (base). */
/* */
-/* Copyright 1996-2015 by */
+/* Copyright 1996-2018 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
@@ -28,6 +28,12 @@
#include FT_SERVICE_POSTSCRIPT_CMAPS_H
#include FT_SFNT_NAMES_H
#include FT_GZIP_H
+
+#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
+#include FT_SERVICE_MULTIPLE_MASTERS_H
+#include FT_SERVICE_METRICS_VARIATIONS_H
+#endif
+
#include "sferrors.h"
#ifdef TT_CONFIG_OPTION_BDF
@@ -48,8 +54,8 @@
/* convert a UTF-16 name entry to ASCII */
static FT_String*
- tt_name_entry_ascii_from_utf16( TT_NameEntry entry,
- FT_Memory memory )
+ tt_name_ascii_from_utf16( TT_Name entry,
+ FT_Memory memory )
{
FT_String* string = NULL;
FT_UInt len, code, n;
@@ -83,8 +89,8 @@
/* convert an Apple Roman or symbol name entry to ASCII */
static FT_String*
- tt_name_entry_ascii_from_other( TT_NameEntry entry,
- FT_Memory memory )
+ tt_name_ascii_from_other( TT_Name entry,
+ FT_Memory memory )
{
FT_String* string = NULL;
FT_UInt len, code, n;
@@ -116,8 +122,8 @@
}
- typedef FT_String* (*TT_NameEntry_ConvertFunc)( TT_NameEntry entry,
- FT_Memory memory );
+ typedef FT_String* (*TT_Name_ConvertFunc)( TT_Name entry,
+ FT_Memory memory );
/* documentation is in sfnt.h */
@@ -127,20 +133,21 @@
FT_UShort nameid,
FT_String** name )
{
- FT_Memory memory = face->root.memory;
- FT_Error error = FT_Err_Ok;
- FT_String* result = NULL;
- FT_UShort n;
- TT_NameEntryRec* rec;
- FT_Int found_apple = -1;
- FT_Int found_apple_roman = -1;
- FT_Int found_apple_english = -1;
- FT_Int found_win = -1;
- FT_Int found_unicode = -1;
+ FT_Memory memory = face->root.memory;
+ FT_Error error = FT_Err_Ok;
+ FT_String* result = NULL;
+ FT_UShort n;
+ TT_Name rec;
- FT_Bool is_english = 0;
+ FT_Int found_apple = -1;
+ FT_Int found_apple_roman = -1;
+ FT_Int found_apple_english = -1;
+ FT_Int found_win = -1;
+ FT_Int found_unicode = -1;
- TT_NameEntry_ConvertFunc convert;
+ FT_Bool is_english = 0;
+
+ TT_Name_ConvertFunc convert;
FT_ASSERT( name );
@@ -225,7 +232,7 @@
/* all Unicode strings are encoded using UTF-16BE */
case TT_MS_ID_UNICODE_CS:
case TT_MS_ID_SYMBOL_CS:
- convert = tt_name_entry_ascii_from_utf16;
+ convert = tt_name_ascii_from_utf16;
break;
case TT_MS_ID_UCS_4:
@@ -234,7 +241,7 @@
/* MsGothic font shipped with Windows Vista shows that this really */
/* means UTF-16 encoded names (UCS-4 values are only used within */
/* charmaps). */
- convert = tt_name_entry_ascii_from_utf16;
+ convert = tt_name_ascii_from_utf16;
break;
default:
@@ -244,17 +251,17 @@
else if ( found_apple >= 0 )
{
rec = face->name_table.names + found_apple;
- convert = tt_name_entry_ascii_from_other;
+ convert = tt_name_ascii_from_other;
}
else if ( found_unicode >= 0 )
{
rec = face->name_table.names + found_unicode;
- convert = tt_name_entry_ascii_from_utf16;
+ convert = tt_name_ascii_from_utf16;
}
if ( rec && convert )
{
- if ( rec->string == NULL )
+ if ( !rec->string )
{
FT_Stream stream = face->name_table.stream;
@@ -304,7 +311,7 @@
{ TT_PLATFORM_MICROSOFT, TT_MS_ID_UCS_4, FT_ENCODING_UNICODE },
{ TT_PLATFORM_MICROSOFT, TT_MS_ID_UNICODE_CS, FT_ENCODING_UNICODE },
{ TT_PLATFORM_MICROSOFT, TT_MS_ID_SJIS, FT_ENCODING_SJIS },
- { TT_PLATFORM_MICROSOFT, TT_MS_ID_GB2312, FT_ENCODING_GB2312 },
+ { TT_PLATFORM_MICROSOFT, TT_MS_ID_PRC, FT_ENCODING_PRC },
{ TT_PLATFORM_MICROSOFT, TT_MS_ID_BIG_5, FT_ENCODING_BIG5 },
{ TT_PLATFORM_MICROSOFT, TT_MS_ID_WANSUNG, FT_ENCODING_WANSUNG },
{ TT_PLATFORM_MICROSOFT, TT_MS_ID_JOHAB, FT_ENCODING_JOHAB }
@@ -451,10 +458,14 @@
woff.metaOrigLength != 0 ) ) ||
( woff.metaLength != 0 && woff.metaOrigLength == 0 ) ||
( woff.privOffset == 0 && woff.privLength != 0 ) )
+ {
+ FT_ERROR(( "woff_font_open: invalid WOFF header\n" ));
return FT_THROW( Invalid_Table );
+ }
- if ( FT_ALLOC( sfnt, woff.totalSfntSize ) ||
- FT_NEW( sfnt_stream ) )
+ /* Don't trust `totalSfntSize' before thorough checks. */
+ if ( FT_ALLOC( sfnt, 12 + woff.num_tables * 16UL ) ||
+ FT_NEW( sfnt_stream ) )
goto Exit;
sfnt_header = sfnt;
@@ -521,6 +532,8 @@
if ( table->Tag <= old_tag )
{
FT_FRAME_EXIT();
+
+ FT_ERROR(( "woff_font_open: table tags are not sorted\n" ));
error = FT_THROW( Invalid_Table );
goto Exit;
}
@@ -555,6 +568,7 @@
sfnt_offset > woff.totalSfntSize - table->OrigLength ||
table->CompLength > table->OrigLength )
{
+ FT_ERROR(( "woff_font_open: invalid table offsets\n" ));
error = FT_THROW( Invalid_Table );
goto Exit;
}
@@ -580,6 +594,8 @@
if ( woff.metaOffset != woff_offset ||
woff.metaOffset + woff.metaLength > woff.length )
{
+ FT_ERROR(( "woff_font_open:"
+ " invalid `metadata' offset or length\n" ));
error = FT_THROW( Invalid_Table );
goto Exit;
}
@@ -596,6 +612,7 @@
if ( woff.privOffset != woff_offset ||
woff.privOffset + woff.privLength > woff.length )
{
+ FT_ERROR(( "woff_font_open: invalid `private' offset or length\n" ));
error = FT_THROW( Invalid_Table );
goto Exit;
}
@@ -607,10 +624,19 @@
if ( sfnt_offset != woff.totalSfntSize ||
woff_offset != woff.length )
{
+ FT_ERROR(( "woff_font_open: invalid `sfnt' table structure\n" ));
error = FT_THROW( Invalid_Table );
goto Exit;
}
+ /* Now use `totalSfntSize'. */
+ if ( FT_REALLOC( sfnt,
+ 12 + woff.num_tables * 16UL,
+ woff.totalSfntSize ) )
+ goto Exit;
+
+ sfnt_header = sfnt + 12;
+
/* Write the tables. */
for ( nn = 0; nn < woff.num_tables; nn++ )
@@ -651,6 +677,7 @@
goto Exit;
if ( output_len != table->OrigLength )
{
+ FT_ERROR(( "woff_font_open: compressed table length mismatch\n" ));
error = FT_THROW( Invalid_Table );
goto Exit;
}
@@ -760,6 +787,8 @@
tag != TTAG_OTTO &&
tag != TTAG_true &&
tag != TTAG_typ1 &&
+ tag != TTAG_0xA5kbd &&
+ tag != TTAG_0xA5lst &&
tag != 0x00020000UL )
{
FT_TRACE2(( " not a font using the SFNT container format\n" ));
@@ -778,6 +807,9 @@
if ( FT_STREAM_READ_FIELDS( ttc_header_fields, &face->ttc_header ) )
return error;
+ FT_TRACE3(( " with %ld subfonts\n",
+ face->ttc_header.count ));
+
if ( face->ttc_header.count == 0 )
return FT_THROW( Invalid_Table );
@@ -852,6 +884,31 @@
FT_FACE_FIND_GLOBAL_SERVICE( face, face->psnames, POSTSCRIPT_CMAPS );
+#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
+ if ( !face->mm )
+ {
+ /* we want the MM interface from the `truetype' module only */
+ FT_Module tt_module = FT_Get_Module( library, "truetype" );
+
+
+ face->mm = ft_module_get_service( tt_module,
+ FT_SERVICE_ID_MULTI_MASTERS,
+ 0 );
+ }
+
+ if ( !face->var )
+ {
+ /* we want the metrics variations interface */
+ /* from the `truetype' module only */
+ FT_Module tt_module = FT_Get_Module( library, "truetype" );
+
+
+ face->var = ft_module_get_service( tt_module,
+ FT_SERVICE_ID_METRICS_VARIATIONS,
+ 0 );
+ }
+#endif
+
FT_TRACE2(( "SFNT driver\n" ));
error = sfnt_open_font( stream, face );
@@ -861,10 +918,14 @@
/* Stream may have changed in sfnt_open_font. */
stream = face->root.stream;
- FT_TRACE2(( "sfnt_init_face: %08p, %ld\n", face, face_instance_index ));
+ FT_TRACE2(( "sfnt_init_face: %08p, %d\n", face, face_instance_index ));
face_index = FT_ABS( face_instance_index ) & 0xFFFF;
+ /* value -(N+1) requests information on index N */
+ if ( face_instance_index < 0 )
+ face_index--;
+
if ( face_index >= face->ttc_header.count )
{
if ( face_instance_index >= 0 )
@@ -883,9 +944,22 @@
#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
{
- FT_ULong fvar_len;
+ FT_Memory memory = face->root.memory;
+
+ FT_ULong fvar_len;
+
+ FT_ULong version;
+ FT_ULong offset;
+
+ FT_UShort num_axes;
+ FT_UShort axis_size;
FT_UShort num_instances;
- FT_Int instance_index;
+ FT_UShort instance_size;
+
+ FT_Int instance_index;
+
+ FT_Byte* default_values = NULL;
+ FT_Byte* instance_values = NULL;
instance_index = FT_ABS( face_instance_index ) >> 16;
@@ -893,19 +967,106 @@
/* test whether current face is a GX font with named instances */
if ( face->goto_table( face, TTAG_fvar, stream, &fvar_len ) ||
fvar_len < 20 ||
- FT_STREAM_SKIP( 12 ) ||
- FT_READ_USHORT( num_instances ) )
+ FT_READ_ULONG( version ) ||
+ FT_READ_USHORT( offset ) ||
+ FT_STREAM_SKIP( 2 ) /* reserved */ ||
+ FT_READ_USHORT( num_axes ) ||
+ FT_READ_USHORT( axis_size ) ||
+ FT_READ_USHORT( num_instances ) ||
+ FT_READ_USHORT( instance_size ) )
+ {
+ version = 0;
+ offset = 0;
+ num_axes = 0;
+ axis_size = 0;
num_instances = 0;
+ instance_size = 0;
+ }
+
+ /* check that the data is bound by the table length */
+ if ( version != 0x00010000UL ||
+ axis_size != 20 ||
+ num_axes == 0 ||
+ /* `num_axes' limit implied by 16-bit `instance_size' */
+ num_axes > 0x3FFE ||
+ !( instance_size == 4 + 4 * num_axes ||
+ instance_size == 6 + 4 * num_axes ) ||
+ /* `num_instances' limit implied by limited range of name IDs */
+ num_instances > 0x7EFF ||
+ offset +
+ axis_size * num_axes +
+ instance_size * num_instances > fvar_len )
+ num_instances = 0;
+ else
+ face->variation_support |= TT_FACE_FLAG_VAR_FVAR;
- /* we support at most 2^15 - 1 instances */
- if ( num_instances >= ( 1U << 15 ) - 1 )
+ /*
+ * As documented in the OpenType specification, an entry for the
+ * default instance may be omitted in the named instance table. In
+ * particular this means that even if there is no named instance
+ * table in the font we actually do have a named instance, namely the
+ * default instance.
+ *
+ * For consistency, we always want the default instance in our list
+ * of named instances. If it is missing, we try to synthesize it
+ * later on. Here, we have to adjust `num_instances' accordingly.
+ */
+
+ if ( ( face->variation_support & TT_FACE_FLAG_VAR_FVAR ) &&
+ !( FT_ALLOC( default_values, num_axes * 4 ) ||
+ FT_ALLOC( instance_values, num_axes * 4 ) ) )
{
- if ( face_instance_index >= 0 )
- return FT_THROW( Invalid_Argument );
- else
- num_instances = 0;
+ /* the current stream position is 16 bytes after the table start */
+ FT_ULong array_start = FT_STREAM_POS() - 16 + offset;
+ FT_ULong default_value_offset, instance_offset;
+
+ FT_Byte* p;
+ FT_UInt i;
+
+
+ default_value_offset = array_start + 8;
+ p = default_values;
+
+ for ( i = 0; i < num_axes; i++ )
+ {
+ (void)FT_STREAM_READ_AT( default_value_offset, p, 4 );
+
+ default_value_offset += axis_size;
+ p += 4;
+ }
+
+ instance_offset = array_start + axis_size * num_axes + 4;
+
+ for ( i = 0; i < num_instances; i++ )
+ {
+ (void)FT_STREAM_READ_AT( instance_offset,
+ instance_values,
+ num_axes * 4 );
+
+ if ( !ft_memcmp( default_values, instance_values, num_axes * 4 ) )
+ break;
+
+ instance_offset += instance_size;
+ }
+
+ if ( i == num_instances )
+ {
+ /* no default instance in named instance table; */
+ /* we thus have to synthesize it */
+ num_instances++;
+ }
}
+ FT_FREE( default_values );
+ FT_FREE( instance_values );
+
+ /* we don't support Multiple Master CFFs yet; */
+ /* note that `glyf' or `CFF2' have precedence */
+ if ( face->goto_table( face, TTAG_glyf, stream, 0 ) &&
+ face->goto_table( face, TTAG_CFF2, stream, 0 ) &&
+ !face->goto_table( face, TTAG_CFF, stream, 0 ) )
+ num_instances = 0;
+
/* instance indices in `face_instance_index' start with index 1, */
/* thus `>' and not `>=' */
if ( instance_index > num_instances )
@@ -921,7 +1082,7 @@
#endif
face->root.num_faces = face->ttc_header.count;
- face->root.face_index = face_index;
+ face->root.face_index = face_instance_index;
return error;
}
@@ -983,8 +1144,10 @@
FT_Bool has_outline;
FT_Bool is_apple_sbit;
FT_Bool is_apple_sbix;
- FT_Bool ignore_preferred_family = FALSE;
- FT_Bool ignore_preferred_subfamily = FALSE;
+ FT_Bool has_CBLC;
+ FT_Bool has_CBDT;
+ FT_Bool ignore_typographic_family = FALSE;
+ FT_Bool ignore_typographic_subfamily = FALSE;
SFNT_Service sfnt = (SFNT_Service)face->sfnt;
@@ -999,10 +1162,10 @@
for ( i = 0; i < num_params; i++ )
{
- if ( params[i].tag == FT_PARAM_TAG_IGNORE_PREFERRED_FAMILY )
- ignore_preferred_family = TRUE;
- else if ( params[i].tag == FT_PARAM_TAG_IGNORE_PREFERRED_SUBFAMILY )
- ignore_preferred_subfamily = TRUE;
+ if ( params[i].tag == FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_FAMILY )
+ ignore_typographic_family = TRUE;
+ else if ( params[i].tag == FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_SUBFAMILY )
+ ignore_typographic_subfamily = TRUE;
}
}
@@ -1027,12 +1190,14 @@
/* do we have outlines in there? */
#ifdef FT_CONFIG_OPTION_INCREMENTAL
- has_outline = FT_BOOL( face->root.internal->incremental_interface != 0 ||
- tt_face_lookup_table( face, TTAG_glyf ) != 0 ||
- tt_face_lookup_table( face, TTAG_CFF ) != 0 );
+ has_outline = FT_BOOL( face->root.internal->incremental_interface ||
+ tt_face_lookup_table( face, TTAG_glyf ) ||
+ tt_face_lookup_table( face, TTAG_CFF ) ||
+ tt_face_lookup_table( face, TTAG_CFF2 ) );
#else
- has_outline = FT_BOOL( tt_face_lookup_table( face, TTAG_glyf ) != 0 ||
- tt_face_lookup_table( face, TTAG_CFF ) != 0 );
+ has_outline = FT_BOOL( tt_face_lookup_table( face, TTAG_glyf ) ||
+ tt_face_lookup_table( face, TTAG_CFF ) ||
+ tt_face_lookup_table( face, TTAG_CFF2 ) );
#endif
is_apple_sbit = 0;
@@ -1061,7 +1226,17 @@
goto Exit;
}
- if ( face->header.Units_Per_EM == 0 )
+ has_CBLC = !face->goto_table( face, TTAG_CBLC, stream, 0 );
+ has_CBDT = !face->goto_table( face, TTAG_CBDT, stream, 0 );
+
+ /* Ignore outlines for CBLC/CBDT fonts. */
+ if ( has_CBLC || has_CBDT )
+ has_outline = FALSE;
+
+ /* OpenType 1.8.2 introduced limits to this value; */
+ /* however, they make sense for older SFNT fonts also */
+ if ( face->header.Units_Per_EM < 16 ||
+ face->header.Units_Per_EM > 16384 )
{
error = FT_THROW( Invalid_Table );
@@ -1164,30 +1339,10 @@
/* embedded bitmap support */
if ( sfnt->load_eblc )
- {
LOAD_( eblc );
- if ( error )
- {
- /* 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 ( FT_ERR_EQ( error, Table_Missing ) )
- error = FT_Err_Ok;
- else
- goto Exit;
- }
- }
+ /* consider the pclt, kerning, and gasp tables as optional */
LOAD_( pclt );
- if ( error )
- {
- if ( FT_ERR_NEQ( error, Table_Missing ) )
- goto Exit;
-
- face->pclt.Version = 0;
- }
-
- /* consider the kerning and gasp tables as optional */
LOAD_( gasp );
LOAD_( kern );
@@ -1203,27 +1358,27 @@
face->root.style_name = NULL;
if ( face->os2.version != 0xFFFFU && face->os2.fsSelection & 256 )
{
- if ( !ignore_preferred_family )
- GET_NAME( PREFERRED_FAMILY, &face->root.family_name );
+ if ( !ignore_typographic_family )
+ GET_NAME( TYPOGRAPHIC_FAMILY, &face->root.family_name );
if ( !face->root.family_name )
GET_NAME( FONT_FAMILY, &face->root.family_name );
- if ( !ignore_preferred_subfamily )
- GET_NAME( PREFERRED_SUBFAMILY, &face->root.style_name );
+ if ( !ignore_typographic_subfamily )
+ GET_NAME( TYPOGRAPHIC_SUBFAMILY, &face->root.style_name );
if ( !face->root.style_name )
GET_NAME( FONT_SUBFAMILY, &face->root.style_name );
}
else
{
GET_NAME( WWS_FAMILY, &face->root.family_name );
- if ( !face->root.family_name && !ignore_preferred_family )
- GET_NAME( PREFERRED_FAMILY, &face->root.family_name );
+ if ( !face->root.family_name && !ignore_typographic_family )
+ GET_NAME( TYPOGRAPHIC_FAMILY, &face->root.family_name );
if ( !face->root.family_name )
GET_NAME( FONT_FAMILY, &face->root.family_name );
GET_NAME( WWS_SUBFAMILY, &face->root.style_name );
- if ( !face->root.style_name && !ignore_preferred_subfamily )
- GET_NAME( PREFERRED_SUBFAMILY, &face->root.style_name );
+ if ( !face->root.style_name && !ignore_typographic_subfamily )
+ GET_NAME( TYPOGRAPHIC_SUBFAMILY, &face->root.style_name );
if ( !face->root.style_name )
GET_NAME( FONT_SUBFAMILY, &face->root.style_name );
}
@@ -1271,10 +1426,14 @@
#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
/* Don't bother to load the tables unless somebody asks for them. */
/* No need to do work which will (probably) not be used. */
- if ( tt_face_lookup_table( face, TTAG_glyf ) != 0 &&
- tt_face_lookup_table( face, TTAG_fvar ) != 0 &&
- tt_face_lookup_table( face, TTAG_gvar ) != 0 )
- flags |= FT_FACE_FLAG_MULTIPLE_MASTERS;
+ if ( face->variation_support & TT_FACE_FLAG_VAR_FVAR )
+ {
+ if ( tt_face_lookup_table( face, TTAG_glyf ) != 0 &&
+ tt_face_lookup_table( face, TTAG_gvar ) != 0 )
+ flags |= FT_FACE_FLAG_MULTIPLE_MASTERS;
+ if ( tt_face_lookup_table( face, TTAG_CFF2 ) != 0 )
+ flags |= FT_FACE_FLAG_MULTIPLE_MASTERS;
+ }
#endif
root->face_flags = flags;
@@ -1317,7 +1476,8 @@
/* Polish the charmaps. */
/* */
/* Try to set the charmap encoding according to the platform & */
- /* encoding ID of each charmap. */
+ /* encoding ID of each charmap. Emulate Unicode charmap if one */
+ /* is missing. */
/* */
tt_face_build_cmaps( face ); /* ignore errors */
@@ -1325,7 +1485,10 @@
/* set the encoding fields */
{
- FT_Int m;
+ FT_Int m;
+#ifdef FT_CONFIG_OPTION_POSTSCRIPT_NAMES
+ FT_Bool has_unicode = FALSE;
+#endif
for ( m = 0; m < root->num_charmaps; m++ )
@@ -1336,14 +1499,34 @@
charmap->encoding = sfnt_find_encoding( charmap->platform_id,
charmap->encoding_id );
-#if 0
- if ( root->charmap == NULL &&
- charmap->encoding == FT_ENCODING_UNICODE )
- {
- /* set 'root->charmap' to the first Unicode encoding we find */
- root->charmap = charmap;
- }
-#endif
+#ifdef FT_CONFIG_OPTION_POSTSCRIPT_NAMES
+
+ if ( charmap->encoding == FT_ENCODING_UNICODE ||
+ charmap->encoding == FT_ENCODING_MS_SYMBOL ) /* PUA */
+ has_unicode = TRUE;
+ }
+
+ /* synthesize Unicode charmap if one is missing */
+ if ( !has_unicode )
+ {
+ FT_CharMapRec cmaprec;
+
+
+ cmaprec.face = root;
+ cmaprec.platform_id = TT_PLATFORM_MICROSOFT;
+ cmaprec.encoding_id = TT_MS_ID_UNICODE_CS;
+ cmaprec.encoding = FT_ENCODING_UNICODE;
+
+
+ error = FT_CMap_New( (FT_CMap_Class)&tt_cmap_unicode_class_rec,
+ NULL, &cmaprec, NULL );
+ if ( error &&
+ FT_ERR_NEQ( error, No_Unicode_Glyph_Name ) )
+ goto Exit;
+ error = FT_Err_Ok;
+
+#endif /* FT_CONFIG_OPTION_POSTSCRIPT_NAMES */
+
}
}
@@ -1355,7 +1538,7 @@
* depths in the FT_Bitmap_Size record. This is a design error.
*/
{
- FT_UInt i, count;
+ FT_UInt count;
count = face->sbit_num_strikes;
@@ -1367,6 +1550,9 @@
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 )
{
@@ -1374,31 +1560,50 @@
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;
+ }
}
}
@@ -1488,9 +1693,9 @@
(FT_Short)( face->vertical_info ? face->vertical.advance_Height_Max
: root->height );
- /* See http://www.microsoft.com/OpenType/OTSpec/post.htm -- */
- /* Adjust underline position from top edge to centre of */
- /* stroke to convert TrueType meaning to FreeType meaning. */
+ /* See https://www.microsoft.com/typography/otspec/post.htm -- */
+ /* Adjust underline position from top edge to centre of */
+ /* stroke to convert TrueType meaning to FreeType meaning. */
root->underline_position = face->postscript.underlinePosition -
face->postscript.underlineThickness / 2;
root->underline_thickness = face->postscript.underlineThickness;
@@ -1559,18 +1764,10 @@
face->cmap_size = 0;
}
- /* freeing the horizontal metrics */
- {
- FT_Stream stream = FT_FACE_STREAM( face );
-
-
- FT_FRAME_RELEASE( face->horz_metrics );
- FT_FRAME_RELEASE( face->vert_metrics );
- face->horz_metrics_size = 0;
- face->vert_metrics_size = 0;
- }
+ face->horz_metrics_size = 0;
+ face->vert_metrics_size = 0;
- /* freeing the vertical ones, if any */
+ /* freeing vertical metrics, if any */
if ( face->vertical_info )
{
FT_FREE( face->vertical.long_metrics );
@@ -1592,9 +1789,13 @@
/* freeing sbit size table */
FT_FREE( face->root.available_sizes );
+ FT_FREE( face->sbit_strike_map );
face->root.num_fixed_sizes = 0;
+#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
FT_FREE( face->postscript_name );
+ FT_FREE( face->var_postscript_prefix );
+#endif
face->sfnt = NULL;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-19 20:36:11 +0000