1 /***************************************************************************/
5 /* TrueType glyph data/program tables loader (body). */
7 /* Copyright 1996-2001 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_OBJECTS_H
22 #include FT_INTERNAL_STREAM_H
23 #include FT_TRUETYPE_TAGS_H
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_ttpload
40 /*************************************************************************/
43 /* TT_Load_Locations */
46 /* Loads the locations table. */
49 /* face :: A handle to the target face object. */
52 /* stream :: The input stream. */
55 /* FreeType error code. 0 means success. */
58 TT_Load_Locations( TT_Face face,
62 FT_Memory memory = stream->memory;
67 FT_TRACE2(( "Locations " ));
68 LongOffsets = face->header.Index_To_Loc_Format;
70 error = face->goto_table( face, TTAG_loca, stream, &table_len );
73 error = TT_Err_Locations_Missing;
77 if ( LongOffsets != 0 )
79 face->num_locations = (FT_UShort)( table_len >> 2 );
81 FT_TRACE2(( "(32bit offsets): %12d ", face->num_locations ));
83 if ( ALLOC_ARRAY( face->glyph_locations,
88 if ( ACCESS_Frame( face->num_locations * 4L ) )
92 FT_Long* loc = face->glyph_locations;
93 FT_Long* limit = loc + face->num_locations;
96 for ( ; loc < limit; loc++ )
104 face->num_locations = (FT_UShort)( table_len >> 1 );
106 FT_TRACE2(( "(16bit offsets): %12d ", face->num_locations ));
108 if ( ALLOC_ARRAY( face->glyph_locations,
113 if ( ACCESS_Frame( face->num_locations * 2L ) )
116 FT_Long* loc = face->glyph_locations;
117 FT_Long* limit = loc + face->num_locations;
120 for ( ; loc < limit; loc++ )
121 *loc = (FT_Long)( (FT_ULong)GET_UShort() * 2 );
126 FT_TRACE2(( "loaded\n" ));
133 /*************************************************************************/
139 /* Loads the control value table into a face object. */
142 /* face :: A handle to the target face object. */
145 /* stream :: A handle to the input stream. */
148 /* FreeType error code. 0 means success. */
150 FT_LOCAL_DEF FT_Error
151 TT_Load_CVT( TT_Face face,
155 FT_Memory memory = stream->memory;
159 FT_TRACE2(( "CVT " ));
161 error = face->goto_table( face, TTAG_cvt, stream, &table_len );
164 FT_TRACE2(( "is missing!\n" ));
173 face->cvt_size = table_len / 2;
175 if ( ALLOC_ARRAY( face->cvt,
180 if ( ACCESS_Frame( face->cvt_size * 2L ) )
184 FT_Short* cur = face->cvt;
185 FT_Short* limit = cur + face->cvt_size;
188 for ( ; cur < limit; cur++ )
193 FT_TRACE2(( "loaded\n" ));
200 /*************************************************************************/
203 /* TT_Load_Progams */
206 /* Loads the font program and the cvt program. */
209 /* face :: A handle to the target face object. */
212 /* stream :: A handle to the input stream. */
215 /* FreeType error code. 0 means success. */
217 FT_LOCAL_DEF FT_Error
218 TT_Load_Programs( TT_Face face,
225 FT_TRACE2(( "Font program " ));
227 /* The font program is optional */
228 error = face->goto_table( face, TTAG_fpgm, stream, &table_len );
231 face->font_program = NULL;
232 face->font_program_size = 0;
234 FT_TRACE2(( "is missing!\n" ));
238 face->font_program_size = table_len;
239 if ( EXTRACT_Frame( table_len, face->font_program ) )
242 FT_TRACE2(( "loaded, %12d bytes\n", face->font_program_size ));
245 FT_TRACE2(( "Prep program " ));
247 error = face->goto_table( face, TTAG_prep, stream, &table_len );
250 face->cvt_program = NULL;
251 face->cvt_program_size = 0;
254 FT_TRACE2(( "is missing!\n" ));
258 face->cvt_program_size = table_len;
259 if ( EXTRACT_Frame( table_len, face->cvt_program ) )
262 FT_TRACE2(( "loaded, %12d bytes\n", face->cvt_program_size ));