1 /***************************************************************************/
5 /* TrueType and OpenType embedded BDF properties (body). */
7 /* Copyright 2005-2017 by */
8 /* David Turner, Robert Wilhelm, and Werner Lemberg. */
10 /* This file is part of the FreeType project, and may only be used, */
11 /* modified, and distributed under the terms of the FreeType project */
12 /* license, LICENSE.TXT. By continuing to use, modify, or distribute */
13 /* this file you indicate that you have read the license and */
14 /* understand and accept it fully. */
16 /***************************************************************************/
20 #include FT_INTERNAL_DEBUG_H
21 #include FT_INTERNAL_STREAM_H
22 #include FT_TRUETYPE_TAGS_H
28 #ifdef TT_CONFIG_OPTION_BDF
30 /*************************************************************************/
32 /* The macro FT_COMPONENT is used in trace mode. It is an implicit */
33 /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
34 /* messages during execution. */
37 #define FT_COMPONENT trace_ttbdf
41 tt_face_free_bdf_props( TT_Face face )
43 TT_BDF bdf = &face->bdf;
48 FT_Stream stream = FT_FACE(face)->stream;
52 FT_FRAME_RELEASE( bdf->table );
54 bdf->table_end = NULL;
56 bdf->strings_size = 0;
62 tt_face_load_bdf_props( TT_Face face,
65 TT_BDF bdf = &face->bdf;
72 error = tt_face_goto_table( face, TTAG_BDF, stream, &length );
75 FT_FRAME_EXTRACT( length, bdf->table ) )
77 error = FT_THROW( Invalid_Table );
81 bdf->table_end = bdf->table + length;
84 FT_Byte* p = bdf->table;
85 FT_UInt version = FT_NEXT_USHORT( p );
86 FT_UInt num_strikes = FT_NEXT_USHORT( p );
87 FT_ULong strings = FT_NEXT_ULONG ( p );
92 if ( version != 0x0001 ||
94 ( strings - 8 ) / 4 < num_strikes ||
95 strings + 1 > length )
100 bdf->num_strikes = num_strikes;
101 bdf->strings = bdf->table + strings;
102 bdf->strings_size = length - strings;
104 count = bdf->num_strikes;
106 strike = p + count * 4;
109 for ( ; count > 0; count-- )
111 FT_UInt num_items = FT_PEEK_USHORT( p + 2 );
114 * We don't need to check the value sets themselves, since this
117 strike += 10 * num_items;
122 if ( strike > bdf->strings )
132 FT_FRAME_RELEASE( bdf->table );
134 error = FT_THROW( Invalid_Table );
139 FT_LOCAL_DEF( FT_Error )
140 tt_face_find_bdf_prop( TT_Face face,
141 const char* property_name,
142 BDF_PropertyRec *aprop )
144 TT_BDF bdf = &face->bdf;
145 FT_Size size = FT_FACE(face)->size;
146 FT_Error error = FT_Err_Ok;
150 FT_Offset property_len;
153 aprop->type = BDF_PROPERTY_TYPE_NONE;
155 if ( bdf->loaded == 0 )
157 error = tt_face_load_bdf_props( face, FT_FACE( face )->stream );
162 count = bdf->num_strikes;
164 strike = p + 4 * count;
166 error = FT_ERR( Invalid_Argument );
168 if ( !size || !property_name )
171 property_len = ft_strlen( property_name );
172 if ( property_len == 0 )
175 for ( ; count > 0; count-- )
177 FT_UInt _ppem = FT_NEXT_USHORT( p );
178 FT_UInt _count = FT_NEXT_USHORT( p );
181 if ( _ppem == size->metrics.y_ppem )
187 strike += 10 * _count;
193 for ( ; count > 0; count-- )
195 FT_UInt type = FT_PEEK_USHORT( p + 4 );
198 if ( ( type & 0x10 ) != 0 )
200 FT_UInt32 name_offset = FT_PEEK_ULONG( p );
201 FT_UInt32 value = FT_PEEK_ULONG( p + 6 );
203 /* be a bit paranoid for invalid entries here */
204 if ( name_offset < bdf->strings_size &&
205 property_len < bdf->strings_size - name_offset &&
206 ft_strncmp( property_name,
207 (const char*)bdf->strings + name_offset,
208 bdf->strings_size - name_offset ) == 0 )
210 switch ( type & 0x0F )
212 case 0x00: /* string */
213 case 0x01: /* atoms */
214 /* check that the content is really 0-terminated */
215 if ( value < bdf->strings_size &&
216 ft_memchr( bdf->strings + value, 0, bdf->strings_size ) )
218 aprop->type = BDF_PROPERTY_TYPE_ATOM;
219 aprop->u.atom = (const char*)bdf->strings + value;
226 aprop->type = BDF_PROPERTY_TYPE_INTEGER;
227 aprop->u.integer = (FT_Int32)value;
232 aprop->type = BDF_PROPERTY_TYPE_CARDINAL;
233 aprop->u.cardinal = value;
249 #else /* !TT_CONFIG_OPTION_BDF */
251 /* ANSI C doesn't like empty source files */
252 typedef int _tt_bdf_dummy;
254 #endif /* !TT_CONFIG_OPTION_BDF */