David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1 | /***************************************************************************/ |
| 2 | /* */ |
| 3 | /* ttload.c */ |
| 4 | /* */ |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 5 | /* Load the basic TrueType tables, i.e., tables that can be either in */ |
| 6 | /* TTF or OTF fonts (body). */ |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 7 | /* */ |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 8 | /* Copyright 1996-2000 by */ |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 9 | /* David Turner, Robert Wilhelm, and Werner Lemberg. */ |
| 10 | /* */ |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 11 | /* This file is part of the FreeType project, and may only be used, */ |
| 12 | /* modified, and distributed under the terms of the FreeType project */ |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 13 | /* license, LICENSE.TXT. By continuing to use, modify, or distribute */ |
| 14 | /* this file you indicate that you have read the license and */ |
| 15 | /* understand and accept it fully. */ |
| 16 | /* */ |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 17 | /***************************************************************************/ |
| 18 | |
| 19 | |
David Turner | efce08d | 2000-05-11 18:23:52 +0000 | [diff] [blame] | 20 | #include <freetype/internal/ftdebug.h> |
| 21 | #include <freetype/internal/tterrors.h> |
| 22 | #include <freetype/tttags.h> |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 23 | |
| 24 | #include <ttload.h> |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 25 | #include <ttcmap.h> |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 26 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 27 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 28 | /*************************************************************************/ |
| 29 | /* */ |
| 30 | /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ |
| 31 | /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ |
| 32 | /* messages during execution. */ |
| 33 | /* */ |
| 34 | #undef FT_COMPONENT |
| 35 | #define FT_COMPONENT trace_ttload |
David Turner | a56489e | 2000-02-13 13:41:56 +0000 | [diff] [blame] | 36 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 37 | |
| 38 | /*************************************************************************/ |
| 39 | /* */ |
| 40 | /* <Function> */ |
| 41 | /* TT_LookUp_Table */ |
| 42 | /* */ |
| 43 | /* <Description> */ |
| 44 | /* Looks for a TrueType table by name. */ |
| 45 | /* */ |
| 46 | /* <Input> */ |
| 47 | /* face :: A face object handle. */ |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 48 | /* tag :: The searched tag. */ |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 49 | /* */ |
| 50 | /* <Return> */ |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 51 | /* A pointer to the table directory entry. 0 if not found. */ |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 52 | /* */ |
David Turner | bfe2f98 | 2000-05-12 12:17:15 +0000 | [diff] [blame] | 53 | LOCAL_FUNC |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 54 | TT_Table* TT_LookUp_Table( TT_Face face, |
| 55 | TT_ULong tag ) |
| 56 | { |
| 57 | TT_Table* entry; |
| 58 | TT_Table* limit; |
David Turner | e49ab25 | 2000-05-16 23:44:38 +0000 | [diff] [blame] | 59 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 60 | |
Werner Lemberg | 1c0d4ac | 2000-06-06 20:41:48 +0000 | [diff] [blame^] | 61 | FT_TRACE3(( "TT_LookUp_Table: %08p, `%c%c%c%c'\n", |
David Turner | 51179f0 | 2000-05-18 16:18:05 +0000 | [diff] [blame] | 62 | face, |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 63 | (TT_Char)( tag >> 24 ), |
| 64 | (TT_Char)( tag >> 16 ), |
| 65 | (TT_Char)( tag >> 8 ), |
| 66 | (TT_Char)( tag ) )); |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 67 | |
| 68 | entry = face->dir_tables; |
| 69 | limit = entry + face->num_tables; |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 70 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 71 | for ( ; entry < limit; entry++ ) |
| 72 | { |
| 73 | if ( entry->Tag == tag ) |
| 74 | return entry; |
David Turner | e49ab25 | 2000-05-16 23:44:38 +0000 | [diff] [blame] | 75 | } |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 76 | |
| 77 | FT_TRACE3(( " Could not find table!\n" )); |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 78 | return 0; |
| 79 | } |
| 80 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 81 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 82 | /*************************************************************************/ |
| 83 | /* */ |
| 84 | /* <Function> */ |
| 85 | /* TT_Goto_Table */ |
| 86 | /* */ |
| 87 | /* <Description> */ |
| 88 | /* Looks for a TrueType table by name, then seek a stream to it. */ |
| 89 | /* */ |
| 90 | /* <Input> */ |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 91 | /* face :: A face object handle. */ |
| 92 | /* tag :: The searched tag. */ |
| 93 | /* stream :: The stream to seek when the table is found. */ |
| 94 | /* */ |
| 95 | /* <Output> */ |
| 96 | /* length :: The length of the table if found, undefined otherwise. */ |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 97 | /* */ |
| 98 | /* <Return> */ |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 99 | /* TrueType error code. 0 means success. */ |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 100 | /* */ |
David Turner | bfe2f98 | 2000-05-12 12:17:15 +0000 | [diff] [blame] | 101 | LOCAL_FUNC |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 102 | TT_Error TT_Goto_Table( TT_Face face, |
| 103 | TT_ULong tag, |
| 104 | FT_Stream stream, |
| 105 | TT_ULong* length ) |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 106 | { |
| 107 | TT_Table* table; |
| 108 | TT_Error error; |
David Turner | e49ab25 | 2000-05-16 23:44:38 +0000 | [diff] [blame] | 109 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 110 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 111 | table = TT_LookUp_Table( face, tag ); |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 112 | if ( table ) |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 113 | { |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 114 | if ( length ) |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 115 | *length = table->Length; |
David Turner | e49ab25 | 2000-05-16 23:44:38 +0000 | [diff] [blame] | 116 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 117 | (void)FILE_Seek( table->Offset ); |
| 118 | } |
| 119 | else |
| 120 | error = TT_Err_Table_Missing; |
David Turner | e49ab25 | 2000-05-16 23:44:38 +0000 | [diff] [blame] | 121 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 122 | return error; |
| 123 | } |
| 124 | |
| 125 | |
| 126 | /*************************************************************************/ |
| 127 | /* */ |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 128 | /* <Function> */ |
David Turner | b1677a8 | 2000-05-29 20:37:41 +0000 | [diff] [blame] | 129 | /* TT_Load_SFNT_Header */ |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 130 | /* */ |
| 131 | /* <Description> */ |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 132 | /* Loads the header of a SFNT font file. Supports collections. */ |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 133 | /* */ |
| 134 | /* <Input> */ |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 135 | /* face :: A handle to the target face object. */ |
| 136 | /* stream :: The input stream. */ |
| 137 | /* face_index :: If the font is a collection, the number of the font */ |
| 138 | /* in the collection, ignored otherwise. */ |
David Turner | b1677a8 | 2000-05-29 20:37:41 +0000 | [diff] [blame] | 139 | /* */ |
David Turner | d42c68e | 2000-01-27 13:56:02 +0000 | [diff] [blame] | 140 | /* <Output> */ |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 141 | /* sfnt :: The SFNT header. */ |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 142 | /* */ |
| 143 | /* <Return> */ |
| 144 | /* TrueType error code. 0 means success. */ |
| 145 | /* */ |
| 146 | /* <Note> */ |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 147 | /* The stream cursor must be at the font file's origin. */ |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 148 | /* */ |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 149 | /* This function recognizes fonts embedded in a `TrueType collection' */ |
| 150 | /* */ |
| 151 | /* The header will be checked whether it is valid by looking at the */ |
| 152 | /* values of `search_range', `entry_selector', and `range_shift'. */ |
David Turner | b1677a8 | 2000-05-29 20:37:41 +0000 | [diff] [blame] | 153 | /* */ |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 154 | LOCAL_FUNC |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 155 | TT_Error TT_Load_SFNT_Header( TT_Face face, |
| 156 | FT_Stream stream, |
| 157 | TT_Long face_index, |
| 158 | SFNT_Header* sfnt ) |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 159 | { |
David Turner | b1677a8 | 2000-05-29 20:37:41 +0000 | [diff] [blame] | 160 | TT_Error error; |
| 161 | TT_ULong format_tag; |
| 162 | FT_Memory memory = stream->memory; |
Werner Lemberg | 920d41e | 2000-06-05 14:32:32 +0000 | [diff] [blame] | 163 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 164 | const FT_Frame_Field sfnt_header_fields[] = |
| 165 | { |
| 166 | FT_FRAME_START( 8 ), |
| 167 | FT_FRAME_USHORT( SFNT_Header, num_tables ), |
| 168 | FT_FRAME_USHORT( SFNT_Header, search_range ), |
| 169 | FT_FRAME_USHORT( SFNT_Header, entry_selector ), |
| 170 | FT_FRAME_USHORT( SFNT_Header, range_shift ), |
| 171 | FT_FRAME_END |
| 172 | }; |
Werner Lemberg | 920d41e | 2000-06-05 14:32:32 +0000 | [diff] [blame] | 173 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 174 | const FT_Frame_Field ttc_header_fields[] = |
| 175 | { |
| 176 | FT_FRAME_START( 8 ), |
| 177 | FT_FRAME_LONG( TTC_Header, version ), |
| 178 | FT_FRAME_LONG( TTC_Header, DirCount ), |
| 179 | FT_FRAME_END }; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 180 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 181 | |
| 182 | FT_TRACE2(( "TT_Load_SFNT_Header: %08p, %ld\n", |
David Turner | 3581d06 | 2000-06-01 03:26:58 +0000 | [diff] [blame] | 183 | face, face_index )); |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 184 | |
| 185 | face->ttc_header.Tag = 0; |
| 186 | face->ttc_header.version = 0; |
| 187 | face->ttc_header.DirCount = 0; |
| 188 | |
| 189 | face->num_tables = 0; |
| 190 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 191 | /* first of all, read the first 4 bytes. If it's `ttcf', then the */ |
David Turner | d42c68e | 2000-01-27 13:56:02 +0000 | [diff] [blame] | 192 | /* file is a TrueType collection, otherwise it can be any other */ |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 193 | /* kind of font. */ |
| 194 | if ( READ_ULong( format_tag ) ) |
| 195 | goto Exit; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 196 | |
David Turner | b1677a8 | 2000-05-29 20:37:41 +0000 | [diff] [blame] | 197 | if ( format_tag == TTAG_ttcf ) |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 198 | { |
| 199 | TT_Int n; |
David Turner | e49ab25 | 2000-05-16 23:44:38 +0000 | [diff] [blame] | 200 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 201 | |
| 202 | FT_TRACE3(( "TT_Load_SFNT_Header: file is a collection\n" )); |
David Turner | e49ab25 | 2000-05-16 23:44:38 +0000 | [diff] [blame] | 203 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 204 | /* it's a TrueType collection, i.e. a file containing several */ |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 205 | /* font files. Read the font directory now */ |
David Turner | a56489e | 2000-02-13 13:41:56 +0000 | [diff] [blame] | 206 | if ( READ_Fields( ttc_header_fields, &face->ttc_header ) ) |
| 207 | goto Exit; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 208 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 209 | /* now read the offsets of each font in the file */ |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 210 | if ( ALLOC_ARRAY( face->ttc_header.TableDirectory, |
| 211 | face->ttc_header.DirCount, |
| 212 | TT_ULong ) || |
| 213 | ACCESS_Frame( face->ttc_header.DirCount * 4L ) ) |
| 214 | goto Exit; |
| 215 | |
| 216 | for ( n = 0; n < face->ttc_header.DirCount; n++ ) |
| 217 | face->ttc_header.TableDirectory[n] = GET_ULong(); |
| 218 | |
| 219 | FORGET_Frame(); |
| 220 | |
| 221 | /* check face index */ |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 222 | if ( face_index >= face->ttc_header.DirCount ) |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 223 | { |
| 224 | error = TT_Err_Bad_Argument; |
| 225 | goto Exit; |
David Turner | e49ab25 | 2000-05-16 23:44:38 +0000 | [diff] [blame] | 226 | } |
| 227 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 228 | /* seek to the appropriate TrueType file, then read tag */ |
David Turner | b1677a8 | 2000-05-29 20:37:41 +0000 | [diff] [blame] | 229 | if ( FILE_Seek( face->ttc_header.TableDirectory[face_index] ) || |
| 230 | READ_Long( format_tag ) ) |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 231 | goto Exit; |
| 232 | } |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 233 | |
David Turner | b1677a8 | 2000-05-29 20:37:41 +0000 | [diff] [blame] | 234 | /* the format tag was read, now check the rest of the header */ |
| 235 | sfnt->format_tag = format_tag; |
| 236 | if ( READ_Fields( sfnt_header_fields, sfnt ) ) |
| 237 | goto Exit; |
Werner Lemberg | 920d41e | 2000-06-05 14:32:32 +0000 | [diff] [blame] | 238 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 239 | /* now, check the values of `num_tables', `seach_range', etc. */ |
David Turner | b1677a8 | 2000-05-29 20:37:41 +0000 | [diff] [blame] | 240 | { |
| 241 | TT_UInt num_tables = sfnt->num_tables; |
David Turner | b1677a8 | 2000-05-29 20:37:41 +0000 | [diff] [blame] | 242 | TT_ULong entry_selector = 1L << sfnt->entry_selector; |
David Turner | 3581d06 | 2000-06-01 03:26:58 +0000 | [diff] [blame] | 243 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 244 | |
| 245 | /* IMPORTANT: Many fonts have an incorrect `search_range' value, so */ |
| 246 | /* we only check the `entry_selector' correctness here. */ |
| 247 | /* */ |
| 248 | if ( num_tables == 0 || |
| 249 | entry_selector > num_tables || |
| 250 | entry_selector * 2 <= num_tables ) |
David Turner | 3581d06 | 2000-06-01 03:26:58 +0000 | [diff] [blame] | 251 | { |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 252 | FT_TRACE2(( "TT_Load_SFNT_Header: file is not SFNT!\n" )); |
David Turner | b1677a8 | 2000-05-29 20:37:41 +0000 | [diff] [blame] | 253 | error = FT_Err_Unknown_File_Format; |
| 254 | } |
| 255 | } |
| 256 | |
David Turner | d42c68e | 2000-01-27 13:56:02 +0000 | [diff] [blame] | 257 | Exit: |
| 258 | return error; |
Werner Lemberg | 920d41e | 2000-06-05 14:32:32 +0000 | [diff] [blame] | 259 | } |
David Turner | b1677a8 | 2000-05-29 20:37:41 +0000 | [diff] [blame] | 260 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 261 | |
David Turner | d42c68e | 2000-01-27 13:56:02 +0000 | [diff] [blame] | 262 | /*************************************************************************/ |
| 263 | /* */ |
| 264 | /* <Function> */ |
| 265 | /* TT_Load_Directory */ |
| 266 | /* */ |
| 267 | /* <Description> */ |
| 268 | /* Loads the table directory into a face object. */ |
| 269 | /* */ |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 270 | /* <InOut> */ |
| 271 | /* face :: A handle to the target face object. */ |
| 272 | /* */ |
David Turner | d42c68e | 2000-01-27 13:56:02 +0000 | [diff] [blame] | 273 | /* <Input> */ |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 274 | /* stream :: The input stream. */ |
| 275 | /* sfnt :: The SFNT directory header. */ |
David Turner | d42c68e | 2000-01-27 13:56:02 +0000 | [diff] [blame] | 276 | /* */ |
| 277 | /* <Return> */ |
| 278 | /* TrueType error code. 0 means success. */ |
| 279 | /* */ |
| 280 | /* <Note> */ |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 281 | /* The stream cursor must be at the font file's origin. */ |
David Turner | d42c68e | 2000-01-27 13:56:02 +0000 | [diff] [blame] | 282 | /* */ |
| 283 | LOCAL_FUNC |
David Turner | b1677a8 | 2000-05-29 20:37:41 +0000 | [diff] [blame] | 284 | TT_Error TT_Load_Directory( TT_Face face, |
| 285 | FT_Stream stream, |
| 286 | SFNT_Header* sfnt ) |
David Turner | d42c68e | 2000-01-27 13:56:02 +0000 | [diff] [blame] | 287 | { |
| 288 | TT_Error error; |
| 289 | FT_Memory memory = stream->memory; |
David Turner | d42c68e | 2000-01-27 13:56:02 +0000 | [diff] [blame] | 290 | |
| 291 | TT_Table *entry, *limit; |
| 292 | |
David Turner | d42c68e | 2000-01-27 13:56:02 +0000 | [diff] [blame] | 293 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 294 | FT_TRACE2(( "TT_Load_Directory: %08p\n", face )); |
| 295 | |
| 296 | FT_TRACE2(( "-- Tables count: %12u\n", sfnt->num_tables )); |
| 297 | FT_TRACE2(( "-- Format version: %08lx\n", sfnt->format_tag )); |
David Turner | d42c68e | 2000-01-27 13:56:02 +0000 | [diff] [blame] | 298 | |
David Turner | b1677a8 | 2000-05-29 20:37:41 +0000 | [diff] [blame] | 299 | face->num_tables = sfnt->num_tables; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 300 | |
| 301 | if ( ALLOC_ARRAY( face->dir_tables, |
| 302 | face->num_tables, |
| 303 | TT_Table ) ) |
| 304 | goto Exit; |
| 305 | |
| 306 | if ( ACCESS_Frame( face->num_tables * 16L ) ) |
| 307 | goto Exit; |
| 308 | |
| 309 | entry = face->dir_tables; |
| 310 | limit = entry + face->num_tables; |
| 311 | |
| 312 | for ( ; entry < limit; entry++ ) |
David Turner | d42c68e | 2000-01-27 13:56:02 +0000 | [diff] [blame] | 313 | { /* loop through the tables and get all entries */ |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 314 | entry->Tag = GET_Tag4(); |
| 315 | entry->CheckSum = GET_ULong(); |
| 316 | entry->Offset = GET_Long(); |
| 317 | entry->Length = GET_Long(); |
| 318 | |
| 319 | FT_TRACE2(( " %c%c%c%c - %08lx - %08lx\n", |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 320 | (TT_Char)( entry->Tag >> 24 ), |
| 321 | (TT_Char)( entry->Tag >> 16 ), |
| 322 | (TT_Char)( entry->Tag >> 8 ), |
| 323 | (TT_Char)( entry->Tag ), |
| 324 | entry->Offset, |
| 325 | entry->Length )); |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 326 | } |
| 327 | |
| 328 | FORGET_Frame(); |
| 329 | |
| 330 | FT_TRACE2(( "Directory loaded\n\n" )); |
| 331 | |
| 332 | Exit: |
| 333 | return error; |
| 334 | } |
| 335 | |
| 336 | |
| 337 | /*************************************************************************/ |
| 338 | /* */ |
| 339 | /* <Function> */ |
| 340 | /* TT_Load_Any */ |
| 341 | /* */ |
| 342 | /* <Description> */ |
| 343 | /* Loads any font table into client memory. Used by the */ |
| 344 | /* TT_Get_Font_Data() API function. */ |
| 345 | /* */ |
| 346 | /* <Input> */ |
| 347 | /* face :: The face object to look for. */ |
| 348 | /* */ |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 349 | /* tag :: The tag of table to load. Use the value 0 if you want */ |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 350 | /* to access the whole font file, else set this parameter */ |
| 351 | /* to a valid TrueType table tag that you can forge with */ |
| 352 | /* the MAKE_TT_TAG macro. */ |
| 353 | /* */ |
| 354 | /* offset :: The starting offset in the table (or the file if */ |
| 355 | /* tag == 0). */ |
| 356 | /* */ |
| 357 | /* length :: The address of the decision variable: */ |
| 358 | /* */ |
| 359 | /* If length == NULL: */ |
| 360 | /* Loads the whole table. Returns an error if */ |
| 361 | /* `offset' == 0! */ |
| 362 | /* */ |
| 363 | /* If *length == 0: */ |
| 364 | /* Exits immediately; returning the length of the given */ |
| 365 | /* table or of the font file, depending on the value of */ |
| 366 | /* `tag'. */ |
| 367 | /* */ |
| 368 | /* If *length != 0: */ |
| 369 | /* Loads the next `length' bytes of table or font, */ |
| 370 | /* starting at offset `offset' (in table or font too). */ |
| 371 | /* */ |
| 372 | /* <Output> */ |
| 373 | /* buffer :: The address of target buffer. */ |
| 374 | /* */ |
| 375 | /* <Return> */ |
| 376 | /* TrueType error code. 0 means success. */ |
| 377 | /* */ |
| 378 | LOCAL_FUNC |
| 379 | TT_Error TT_Load_Any( TT_Face face, |
| 380 | TT_ULong tag, |
| 381 | TT_Long offset, |
| 382 | void* buffer, |
| 383 | TT_Long* length ) |
| 384 | { |
| 385 | TT_Error error; |
| 386 | FT_Stream stream; |
| 387 | TT_Table* table; |
| 388 | TT_ULong size; |
| 389 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 390 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 391 | if ( tag != 0 ) |
| 392 | { |
| 393 | /* look for tag in font directory */ |
| 394 | table = TT_LookUp_Table( face, tag ); |
| 395 | if ( !table ) |
| 396 | { |
| 397 | error = TT_Err_Table_Missing; |
| 398 | goto Exit; |
| 399 | } |
| 400 | |
| 401 | offset += table->Offset; |
| 402 | size = table->Length; |
| 403 | } |
| 404 | else |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 405 | /* tag == 0 -- the user wants to access the font file directly */ |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 406 | size = face->root.stream->size; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 407 | |
| 408 | if ( length && *length == 0 ) |
| 409 | { |
| 410 | *length = size; |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 411 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 412 | return TT_Err_Ok; |
| 413 | } |
| 414 | |
| 415 | if ( length ) |
| 416 | size = *length; |
| 417 | |
| 418 | stream = face->root.stream; |
| 419 | (void)FILE_Read_At( offset, buffer, size ); |
| 420 | |
| 421 | Exit: |
| 422 | return error; |
| 423 | } |
| 424 | |
| 425 | |
| 426 | /*************************************************************************/ |
| 427 | /* */ |
| 428 | /* <Function> */ |
| 429 | /* TT_Load_Header */ |
| 430 | /* */ |
| 431 | /* <Description> */ |
| 432 | /* Loads the TrueType font header. */ |
| 433 | /* */ |
| 434 | /* <Input> */ |
| 435 | /* face :: A handle to the target face object. */ |
| 436 | /* stream :: The input stream. */ |
| 437 | /* */ |
| 438 | /* <Return> */ |
| 439 | /* TrueType error code. 0 means success. */ |
| 440 | /* */ |
| 441 | LOCAL_FUNC |
| 442 | TT_Error TT_Load_Header( TT_Face face, |
| 443 | FT_Stream stream ) |
| 444 | { |
| 445 | TT_Error error; |
| 446 | TT_Header* header; |
David Turner | b1677a8 | 2000-05-29 20:37:41 +0000 | [diff] [blame] | 447 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 448 | static const FT_Frame_Field header_fields[] = |
| 449 | { |
| 450 | FT_FRAME_START( 54 ), |
| 451 | FT_FRAME_ULONG( TT_Header, Table_Version ), |
| 452 | FT_FRAME_ULONG( TT_Header, Font_Revision ), |
| 453 | FT_FRAME_LONG( TT_Header, CheckSum_Adjust ), |
| 454 | FT_FRAME_LONG( TT_Header, Magic_Number ), |
| 455 | FT_FRAME_USHORT( TT_Header, Flags ), |
| 456 | FT_FRAME_USHORT( TT_Header, Units_Per_EM ), |
| 457 | FT_FRAME_LONG( TT_Header, Created[0] ), |
| 458 | FT_FRAME_LONG( TT_Header, Created[1] ), |
| 459 | FT_FRAME_LONG( TT_Header, Modified[0] ), |
| 460 | FT_FRAME_LONG( TT_Header, Modified[1] ), |
| 461 | FT_FRAME_SHORT( TT_Header, xMin ), |
| 462 | FT_FRAME_SHORT( TT_Header, yMin ), |
| 463 | FT_FRAME_SHORT( TT_Header, xMax ), |
| 464 | FT_FRAME_SHORT( TT_Header, yMax ), |
| 465 | FT_FRAME_USHORT( TT_Header, Mac_Style ), |
| 466 | FT_FRAME_USHORT( TT_Header, Lowest_Rec_PPEM ), |
| 467 | FT_FRAME_SHORT( TT_Header, Font_Direction ), |
| 468 | FT_FRAME_SHORT( TT_Header, Index_To_Loc_Format ), |
| 469 | FT_FRAME_SHORT( TT_Header, Glyph_Data_Format ), |
| 470 | FT_FRAME_END |
| 471 | }; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 472 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 473 | |
| 474 | FT_TRACE2(( "Load_TT_Header: %08p\n", face )); |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 475 | |
| 476 | error = face->goto_table( face, TTAG_head, stream, 0 ); |
| 477 | if ( error ) |
| 478 | { |
| 479 | FT_TRACE0(( "Font Header is missing!\n" )); |
| 480 | goto Exit; |
| 481 | } |
| 482 | |
David Turner | a56489e | 2000-02-13 13:41:56 +0000 | [diff] [blame] | 483 | header = &face->header; |
| 484 | |
David Turner | b1677a8 | 2000-05-29 20:37:41 +0000 | [diff] [blame] | 485 | if ( READ_Fields( header_fields, header ) ) |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 486 | goto Exit; |
| 487 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 488 | FT_TRACE2(( " Units per EM: %8u\n", header->Units_Per_EM )); |
| 489 | FT_TRACE2(( " IndexToLoc: %8d\n", header->Index_To_Loc_Format )); |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 490 | FT_TRACE2(( "Font Header Loaded.\n" )); |
| 491 | |
| 492 | Exit: |
| 493 | return error; |
| 494 | } |
| 495 | |
| 496 | |
| 497 | /*************************************************************************/ |
| 498 | /* */ |
| 499 | /* <Function> */ |
| 500 | /* TT_Load_MaxProfile */ |
| 501 | /* */ |
| 502 | /* <Description> */ |
| 503 | /* Loads the maximum profile into a face object. */ |
| 504 | /* */ |
| 505 | /* <Input> */ |
| 506 | /* face :: A handle to the target face object. */ |
| 507 | /* stream :: The input stream. */ |
| 508 | /* */ |
| 509 | /* <Return> */ |
| 510 | /* TrueType error code. 0 means success. */ |
| 511 | /* */ |
| 512 | LOCAL_FUNC |
| 513 | TT_Error TT_Load_MaxProfile( TT_Face face, |
| 514 | FT_Stream stream ) |
| 515 | { |
| 516 | TT_Error error; |
| 517 | TT_MaxProfile* maxProfile = &face->max_profile; |
David Turner | b1677a8 | 2000-05-29 20:37:41 +0000 | [diff] [blame] | 518 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 519 | const FT_Frame_Field maxp_fields[] = |
| 520 | { |
| 521 | FT_FRAME_START( 32 ), |
| 522 | FT_FRAME_ULONG( TT_MaxProfile, version ), |
| 523 | FT_FRAME_USHORT( TT_MaxProfile, numGlyphs ), |
| 524 | FT_FRAME_USHORT( TT_MaxProfile, maxPoints ), |
| 525 | FT_FRAME_USHORT( TT_MaxProfile, maxContours ), |
| 526 | FT_FRAME_USHORT( TT_MaxProfile, maxCompositePoints ), |
| 527 | FT_FRAME_USHORT( TT_MaxProfile, maxCompositeContours ), |
| 528 | FT_FRAME_USHORT( TT_MaxProfile, maxZones ), |
| 529 | FT_FRAME_USHORT( TT_MaxProfile, maxTwilightPoints ), |
| 530 | FT_FRAME_USHORT( TT_MaxProfile, maxStorage ), |
| 531 | FT_FRAME_USHORT( TT_MaxProfile, maxFunctionDefs ), |
| 532 | FT_FRAME_USHORT( TT_MaxProfile, maxInstructionDefs ), |
| 533 | FT_FRAME_USHORT( TT_MaxProfile, maxStackElements ), |
| 534 | FT_FRAME_USHORT( TT_MaxProfile, maxSizeOfInstructions ), |
| 535 | FT_FRAME_USHORT( TT_MaxProfile, maxComponentElements ), |
| 536 | FT_FRAME_USHORT( TT_MaxProfile, maxComponentDepth ), |
| 537 | FT_FRAME_END }; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 538 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 539 | |
| 540 | FT_TRACE2(( "Load_TT_MaxProfile: %08p\n", face )); |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 541 | |
| 542 | error = face->goto_table( face, TTAG_maxp, stream, 0 ); |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 543 | if ( error ) |
| 544 | goto Exit; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 545 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 546 | if ( READ_Fields( maxp_fields, maxProfile ) ) |
| 547 | goto Exit; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 548 | |
| 549 | /* XXX: an adjustment that is necessary to load certain */ |
| 550 | /* broken fonts like `Keystrokes MT' :-( */ |
| 551 | /* */ |
| 552 | /* We allocate 64 function entries by default when */ |
| 553 | /* the maxFunctionDefs field is null. */ |
| 554 | |
| 555 | if ( maxProfile->maxFunctionDefs == 0 ) |
| 556 | maxProfile->maxFunctionDefs = 64; |
| 557 | |
| 558 | face->root.num_glyphs = maxProfile->numGlyphs; |
| 559 | |
| 560 | face->root.max_points = MAX( maxProfile->maxCompositePoints, |
| 561 | maxProfile->maxPoints ); |
| 562 | |
| 563 | face->root.max_contours = MAX( maxProfile->maxCompositeContours, |
| 564 | maxProfile->maxContours ); |
| 565 | |
| 566 | face->max_components = (TT_ULong)maxProfile->maxComponentElements + |
| 567 | maxProfile->maxComponentDepth; |
| 568 | |
| 569 | /* XXX: some fonts have maxComponents set to 0; we will */ |
| 570 | /* then use 16 of them by default. */ |
| 571 | if ( face->max_components == 0 ) |
| 572 | face->max_components = 16; |
| 573 | |
| 574 | /* We also increase maxPoints and maxContours in order to support */ |
| 575 | /* some broken fonts. */ |
| 576 | face->root.max_points += 8; |
| 577 | face->root.max_contours += 4; |
| 578 | |
| 579 | FT_TRACE2(( "MAXP loaded.\n" )); |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 580 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 581 | Exit: |
| 582 | return error; |
| 583 | } |
| 584 | |
| 585 | |
| 586 | /*************************************************************************/ |
| 587 | /* */ |
| 588 | /* <Function> */ |
| 589 | /* TT_Load_Metrics */ |
| 590 | /* */ |
| 591 | /* <Description> */ |
| 592 | /* Loads the horizontal or vertical metrics table into a face object. */ |
| 593 | /* */ |
| 594 | /* <Input> */ |
| 595 | /* face :: A handle to the target face object. */ |
| 596 | /* stream :: The input stream. */ |
| 597 | /* vertical :: A boolean flag. If set, load vertical metrics. */ |
| 598 | /* */ |
| 599 | /* <Return> */ |
| 600 | /* TrueType error code. 0 means success. */ |
| 601 | /* */ |
| 602 | static |
| 603 | TT_Error TT_Load_Metrics( TT_Face face, |
| 604 | FT_Stream stream, |
| 605 | TT_Bool vertical ) |
| 606 | { |
| 607 | TT_Error error; |
| 608 | FT_Memory memory = stream->memory; |
| 609 | |
| 610 | TT_ULong table_len; |
| 611 | TT_Long num_shorts, num_longs, num_shorts_checked; |
| 612 | |
| 613 | TT_LongMetrics** longs; |
| 614 | TT_ShortMetrics** shorts; |
| 615 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 616 | FT_TRACE2(( "TT_Load_%s_Metrics: %08p\n", |
| 617 | vertical ? "Vertical" : "Horizontal", face )); |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 618 | |
| 619 | if ( vertical ) |
| 620 | { |
| 621 | /* The table is optional, quit silently if it wasn't found */ |
| 622 | /* XXX: Some fonts have a valid vertical header with a non-null */ |
| 623 | /* `number_of_VMetrics' fields, but no corresponding `vmtx' */ |
| 624 | /* table to get the metrics from (e.g. mingliu). */ |
| 625 | /* */ |
| 626 | /* For safety, we set the field to 0! */ |
| 627 | /* */ |
| 628 | error = face->goto_table( face, TTAG_vmtx, stream, &table_len ); |
| 629 | if ( error ) |
| 630 | { |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 631 | /* Set number_Of_VMetrics to 0! */ |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 632 | FT_TRACE2(( " no vertical header in file.\n" )); |
| 633 | face->vertical.number_Of_VMetrics = 0; |
| 634 | error = TT_Err_Ok; |
| 635 | goto Exit; |
| 636 | } |
| 637 | |
| 638 | num_longs = face->vertical.number_Of_VMetrics; |
| 639 | longs = (TT_LongMetrics**)&face->vertical.long_metrics; |
| 640 | shorts = (TT_ShortMetrics**)&face->vertical.short_metrics; |
| 641 | } |
| 642 | else |
| 643 | { |
| 644 | error = face->goto_table( face, TTAG_hmtx, stream, &table_len ); |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 645 | if ( error ) |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 646 | { |
| 647 | FT_ERROR(( " no horizontal metrics in file!\n" )); |
| 648 | error = TT_Err_Hmtx_Table_Missing; |
| 649 | goto Exit; |
| 650 | } |
| 651 | |
| 652 | num_longs = face->horizontal.number_Of_HMetrics; |
| 653 | longs = (TT_LongMetrics**)&face->horizontal.long_metrics; |
| 654 | shorts = (TT_ShortMetrics**)&face->horizontal.short_metrics; |
| 655 | } |
| 656 | |
| 657 | /* never trust derived values */ |
| 658 | |
| 659 | num_shorts = face->max_profile.numGlyphs - num_longs; |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 660 | num_shorts_checked = ( table_len - num_longs * 4L ) / 2; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 661 | |
| 662 | if ( num_shorts < 0 ) |
| 663 | { |
| 664 | FT_ERROR(( "!! more metrics than glyphs!\n" )); |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 665 | |
| 666 | error = vertical ? TT_Err_Invalid_Vert_Metrics |
| 667 | : TT_Err_Invalid_Horiz_Metrics; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 668 | goto Exit; |
| 669 | } |
| 670 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 671 | if ( ALLOC_ARRAY( *longs, num_longs, TT_LongMetrics ) || |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 672 | ALLOC_ARRAY( *shorts, num_shorts, TT_ShortMetrics ) ) |
| 673 | goto Exit; |
| 674 | |
| 675 | if ( ACCESS_Frame( table_len ) ) |
| 676 | goto Exit; |
| 677 | |
| 678 | { |
| 679 | TT_LongMetrics* cur = *longs; |
| 680 | TT_LongMetrics* limit = cur + num_longs; |
| 681 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 682 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 683 | for ( ; cur < limit; cur++ ) |
| 684 | { |
| 685 | cur->advance = GET_UShort(); |
| 686 | cur->bearing = GET_Short(); |
| 687 | } |
| 688 | } |
| 689 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 690 | /* do we have an inconsistent number of metric values? */ |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 691 | { |
| 692 | TT_ShortMetrics* cur = *shorts; |
| 693 | TT_ShortMetrics* limit = cur + MIN( num_shorts, num_shorts_checked ); |
| 694 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 695 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 696 | for ( ; cur < limit; cur++ ) |
| 697 | *cur = GET_Short(); |
| 698 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 699 | /* we fill up the missing left side bearings with the */ |
| 700 | /* last valid value. Since this will occur for buggy CJK */ |
| 701 | /* fonts usually only, nothing serious will happen */ |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 702 | if ( num_shorts > num_shorts_checked && num_shorts_checked > 0 ) |
| 703 | { |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 704 | TT_Short val = *(shorts)[num_shorts_checked - 1]; |
| 705 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 706 | |
| 707 | limit = *shorts + num_shorts; |
| 708 | for ( ; cur < limit; cur++ ) |
| 709 | *cur = val; |
| 710 | } |
| 711 | } |
| 712 | |
| 713 | FORGET_Frame(); |
| 714 | |
| 715 | FT_TRACE2(( "loaded\n" )); |
| 716 | |
| 717 | Exit: |
| 718 | return error; |
| 719 | } |
| 720 | |
| 721 | |
| 722 | /*************************************************************************/ |
| 723 | /* */ |
| 724 | /* <Function> */ |
| 725 | /* TT_Load_Metrics_Header */ |
| 726 | /* */ |
| 727 | /* <Description> */ |
| 728 | /* Loads the horizontal or vertical header in a face object. */ |
| 729 | /* */ |
| 730 | /* <Input> */ |
| 731 | /* face :: A handle to the target face object. */ |
| 732 | /* stream :: The input stream. */ |
| 733 | /* vertical :: A boolean flag. If set, load vertical metrics. */ |
| 734 | /* */ |
| 735 | /* <Return> */ |
| 736 | /* TrueType error code. 0 means success. */ |
| 737 | /* */ |
| 738 | LOCAL_FUNC |
| 739 | TT_Error TT_Load_Metrics_Header( TT_Face face, |
| 740 | FT_Stream stream, |
| 741 | TT_Bool vertical ) |
| 742 | { |
| 743 | TT_Error error; |
| 744 | TT_HoriHeader* header; |
David Turner | b1677a8 | 2000-05-29 20:37:41 +0000 | [diff] [blame] | 745 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 746 | const FT_Frame_Field metrics_header_fields[] = |
| 747 | { |
| 748 | FT_FRAME_START( 36 ), |
| 749 | FT_FRAME_ULONG( TT_HoriHeader, Version ), |
| 750 | FT_FRAME_SHORT( TT_HoriHeader, Ascender ), |
| 751 | FT_FRAME_SHORT( TT_HoriHeader, Descender ), |
| 752 | FT_FRAME_SHORT( TT_HoriHeader, Line_Gap ), |
| 753 | FT_FRAME_USHORT( TT_HoriHeader, advance_Width_Max ), |
| 754 | FT_FRAME_SHORT( TT_HoriHeader, min_Left_Side_Bearing ), |
| 755 | FT_FRAME_SHORT( TT_HoriHeader, min_Right_Side_Bearing ), |
| 756 | FT_FRAME_SHORT( TT_HoriHeader, xMax_Extent ), |
| 757 | FT_FRAME_SHORT( TT_HoriHeader, caret_Slope_Rise ), |
| 758 | FT_FRAME_SHORT( TT_HoriHeader, caret_Slope_Run ), |
| 759 | FT_FRAME_SHORT( TT_HoriHeader, Reserved[0] ), |
| 760 | FT_FRAME_SHORT( TT_HoriHeader, Reserved[1] ), |
| 761 | FT_FRAME_SHORT( TT_HoriHeader, Reserved[2] ), |
| 762 | FT_FRAME_SHORT( TT_HoriHeader, Reserved[3] ), |
| 763 | FT_FRAME_SHORT( TT_HoriHeader, Reserved[4] ), |
| 764 | FT_FRAME_SHORT( TT_HoriHeader, metric_Data_Format ), |
| 765 | FT_FRAME_USHORT( TT_HoriHeader, number_Of_HMetrics ), |
| 766 | FT_FRAME_END |
| 767 | }; |
| 768 | |
David Turner | b1677a8 | 2000-05-29 20:37:41 +0000 | [diff] [blame] | 769 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 770 | FT_TRACE2(( vertical ? "Vertical header " : "Horizontal header " )); |
| 771 | |
| 772 | if ( vertical ) |
| 773 | { |
| 774 | face->vertical_info = 0; |
| 775 | |
| 776 | /* The vertical header table is optional, so return quietly if */ |
| 777 | /* we don't find it. */ |
| 778 | error = face->goto_table( face, TTAG_vhea, stream, 0 ); |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 779 | if ( error ) |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 780 | { |
| 781 | error = TT_Err_Ok; |
| 782 | goto Exit; |
| 783 | } |
| 784 | |
| 785 | face->vertical_info = 1; |
| 786 | header = (TT_HoriHeader*)&face->vertical; |
| 787 | } |
| 788 | else |
| 789 | { |
| 790 | /* The horizontal header is mandatory, return an error if we */ |
| 791 | /* don't find it. */ |
| 792 | error = face->goto_table( face, TTAG_hhea, stream, 0 ); |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 793 | if ( error ) |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 794 | { |
| 795 | error = TT_Err_Horiz_Header_Missing; |
| 796 | goto Exit; |
| 797 | } |
| 798 | |
| 799 | header = &face->horizontal; |
| 800 | } |
| 801 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 802 | if ( READ_Fields( metrics_header_fields, header ) ) |
| 803 | goto Exit; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 804 | |
| 805 | header->long_metrics = NULL; |
| 806 | header->short_metrics = NULL; |
| 807 | |
| 808 | FT_TRACE2(( "loaded\n" )); |
| 809 | |
| 810 | /* Now try to load the corresponding metrics */ |
| 811 | |
| 812 | error = TT_Load_Metrics( face, stream, vertical ); |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 813 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 814 | Exit: |
| 815 | return error; |
| 816 | } |
| 817 | |
| 818 | |
| 819 | /*************************************************************************/ |
| 820 | /* */ |
| 821 | /* <Function> */ |
| 822 | /* TT_Load_Names */ |
| 823 | /* */ |
| 824 | /* <Description> */ |
| 825 | /* Loads the name records. */ |
| 826 | /* */ |
| 827 | /* <Input> */ |
| 828 | /* face :: A handle to the target face object. */ |
| 829 | /* stream :: The input stream. */ |
| 830 | /* */ |
| 831 | /* <Return> */ |
| 832 | /* TrueType error code. 0 means success. */ |
| 833 | /* */ |
| 834 | LOCAL_FUNC |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 835 | TT_Error TT_Load_Names( TT_Face face, |
| 836 | FT_Stream stream ) |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 837 | { |
| 838 | TT_Error error; |
| 839 | FT_Memory memory = stream->memory; |
| 840 | |
| 841 | TT_ULong table_pos, table_len; |
| 842 | TT_ULong storageSize; |
| 843 | |
| 844 | TT_NameTable* names; |
David Turner | b1677a8 | 2000-05-29 20:37:41 +0000 | [diff] [blame] | 845 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 846 | const FT_Frame_Field name_table_fields[] = |
| 847 | { |
| 848 | FT_FRAME_START( 6 ), |
| 849 | FT_FRAME_USHORT( TT_NameTable, format ), |
| 850 | FT_FRAME_USHORT( TT_NameTable, numNameRecords ), |
| 851 | FT_FRAME_USHORT( TT_NameTable, storageOffset ), |
| 852 | FT_FRAME_END |
| 853 | }; |
David Turner | a56489e | 2000-02-13 13:41:56 +0000 | [diff] [blame] | 854 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 855 | const FT_Frame_Field name_record_fields[] = |
| 856 | { |
| 857 | /* no FT_FRAME_START */ |
| 858 | FT_FRAME_USHORT( TT_NameRec, platformID ), |
| 859 | FT_FRAME_USHORT( TT_NameRec, encodingID ), |
| 860 | FT_FRAME_USHORT( TT_NameRec, languageID ), |
| 861 | FT_FRAME_USHORT( TT_NameRec, nameID ), |
| 862 | FT_FRAME_USHORT( TT_NameRec, stringLength ), |
| 863 | FT_FRAME_USHORT( TT_NameRec, stringOffset ), |
| 864 | FT_FRAME_END |
| 865 | }; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 866 | |
| 867 | |
| 868 | FT_TRACE2(( "Names " )); |
| 869 | |
| 870 | error = face->goto_table( face, TTAG_name, stream, &table_len ); |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 871 | if ( error ) |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 872 | { |
| 873 | /* The name table is required so indicate failure. */ |
| 874 | FT_TRACE2(( "is missing!\n" )); |
| 875 | error = TT_Err_Name_Table_Missing; |
| 876 | goto Exit; |
| 877 | } |
| 878 | |
| 879 | table_pos = FILE_Pos(); |
| 880 | |
David Turner | a56489e | 2000-02-13 13:41:56 +0000 | [diff] [blame] | 881 | names = &face->name_table; |
| 882 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 883 | if ( READ_Fields( name_table_fields, names ) ) |
| 884 | goto Exit; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 885 | |
| 886 | /* Allocate the array of name records. */ |
| 887 | if ( ALLOC_ARRAY( names->names, |
| 888 | names->numNameRecords, |
| 889 | TT_NameRec ) || |
| 890 | ACCESS_Frame( names->numNameRecords * 12L ) ) |
| 891 | goto Exit; |
| 892 | |
| 893 | /* Load the name records and determine how much storage is needed */ |
| 894 | /* to hold the strings themselves. */ |
| 895 | { |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 896 | TT_NameRec* cur = names->names; |
| 897 | TT_NameRec* limit = cur + names->numNameRecords; |
| 898 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 899 | |
| 900 | storageSize = 0; |
| 901 | |
| 902 | for ( ; cur < limit; cur ++ ) |
| 903 | { |
| 904 | TT_ULong upper; |
| 905 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 906 | |
David Turner | a56489e | 2000-02-13 13:41:56 +0000 | [diff] [blame] | 907 | (void)READ_Fields( name_record_fields, cur ); |
David Turner | b1677a8 | 2000-05-29 20:37:41 +0000 | [diff] [blame] | 908 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 909 | upper = (TT_ULong)( cur->stringOffset + cur->stringLength ); |
| 910 | if ( upper > storageSize ) |
| 911 | storageSize = upper; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 912 | } |
| 913 | } |
| 914 | |
| 915 | FORGET_Frame(); |
| 916 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 917 | if ( storageSize > 0 ) |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 918 | { |
| 919 | /* allocate the name storage area in memory, then read it */ |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 920 | if ( ALLOC( names->storage, storageSize ) || |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 921 | FILE_Read_At( table_pos + names->storageOffset, |
| 922 | (void*)names->storage, storageSize ) ) |
| 923 | goto Exit; |
David Turner | e49ab25 | 2000-05-16 23:44:38 +0000 | [diff] [blame] | 924 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 925 | /* Go through and assign the string pointers to the name records. */ |
| 926 | { |
| 927 | TT_NameRec* cur = names->names; |
| 928 | TT_NameRec* limit = cur + names->numNameRecords; |
David Turner | e49ab25 | 2000-05-16 23:44:38 +0000 | [diff] [blame] | 929 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 930 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 931 | for ( ; cur < limit; cur++ ) |
| 932 | cur->string = names->storage + cur->stringOffset; |
| 933 | } |
| 934 | |
David Turner | e49ab25 | 2000-05-16 23:44:38 +0000 | [diff] [blame] | 935 | #ifdef FT_DEBUG_LEVEL_TRACE |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 936 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 937 | /* Print Name Record Table in case of debugging */ |
| 938 | { |
| 939 | TT_NameRec* cur = names->names; |
| 940 | TT_NameRec* limit = cur + names->numNameRecords; |
| 941 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 942 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 943 | for ( ; cur < limit; cur++ ) |
| 944 | { |
| 945 | TT_UInt j; |
David Turner | e49ab25 | 2000-05-16 23:44:38 +0000 | [diff] [blame] | 946 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 947 | |
| 948 | FT_TRACE3(( "%d %d %x %d\n ", |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 949 | cur->platformID, |
| 950 | cur->encodingID, |
| 951 | cur->languageID, |
| 952 | cur->nameID )); |
David Turner | e49ab25 | 2000-05-16 23:44:38 +0000 | [diff] [blame] | 953 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 954 | /* I know that M$ encoded strings are Unicode, */ |
| 955 | /* but this works reasonable well for debugging purposes. */ |
| 956 | if ( cur->string ) |
| 957 | for ( j = 0; j < cur->stringLength; j++ ) |
| 958 | { |
| 959 | TT_Char c = *(cur->string + j); |
David Turner | e49ab25 | 2000-05-16 23:44:38 +0000 | [diff] [blame] | 960 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 961 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 962 | if ( (TT_Byte)c < 128 ) |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 963 | FT_TRACE3(( "%c", c )); |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 964 | } |
| 965 | } |
| 966 | } |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 967 | FT_TRACE3(( "\n" )); |
| 968 | |
| 969 | #endif /* FT_DEBUG_LEVEL_TRACE */ |
| 970 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 971 | } |
| 972 | FT_TRACE2(( "loaded\n" )); |
| 973 | |
| 974 | Exit: |
| 975 | return error; |
| 976 | } |
| 977 | |
| 978 | |
| 979 | /*************************************************************************/ |
| 980 | /* */ |
| 981 | /* <Function> */ |
| 982 | /* TT_Free_Names */ |
| 983 | /* */ |
| 984 | /* <Description> */ |
| 985 | /* Frees the name records. */ |
| 986 | /* */ |
| 987 | /* <Input> */ |
| 988 | /* face :: A handle to the target face object. */ |
| 989 | /* */ |
| 990 | LOCAL_FUNC |
| 991 | void TT_Free_Names( TT_Face face ) |
| 992 | { |
| 993 | FT_Memory memory = face->root.driver->memory; |
| 994 | TT_NameTable* names = &face->name_table; |
| 995 | |
| 996 | |
| 997 | /* free strings table */ |
| 998 | FREE( names->names ); |
| 999 | |
| 1000 | /* free strings storage */ |
| 1001 | FREE( names->storage ); |
| 1002 | |
| 1003 | names->numNameRecords = 0; |
| 1004 | names->format = 0; |
| 1005 | names->storageOffset = 0; |
| 1006 | } |
| 1007 | |
| 1008 | |
| 1009 | /*************************************************************************/ |
| 1010 | /* */ |
| 1011 | /* <Function> */ |
| 1012 | /* TT_Load_CMap */ |
| 1013 | /* */ |
| 1014 | /* <Description> */ |
| 1015 | /* Loads the cmap directory in a face object. The cmaps itselves are */ |
| 1016 | /* loaded on demand in the `ttcmap.c' module. */ |
| 1017 | /* */ |
| 1018 | /* <Input> */ |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1019 | /* face :: A handle to the target face object. */ |
| 1020 | /* stream :: A handle to the input stream. */ |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1021 | /* */ |
| 1022 | /* <Return> */ |
| 1023 | /* TrueType error code. 0 means success. */ |
| 1024 | /* */ |
| 1025 | LOCAL_FUNC |
| 1026 | TT_Error TT_Load_CMap( TT_Face face, |
| 1027 | FT_Stream stream ) |
| 1028 | { |
| 1029 | TT_Error error; |
| 1030 | FT_Memory memory = stream->memory; |
David Turner | a56489e | 2000-02-13 13:41:56 +0000 | [diff] [blame] | 1031 | TT_Long table_start; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1032 | TT_CMapDir cmap_dir; |
| 1033 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1034 | const FT_Frame_Field cmap_fields[] = |
| 1035 | { |
| 1036 | FT_FRAME_START( 4 ), |
| 1037 | FT_FRAME_USHORT( TT_CMapDir, tableVersionNumber ), |
| 1038 | FT_FRAME_USHORT( TT_CMapDir, numCMaps ), |
| 1039 | FT_FRAME_END |
| 1040 | }; |
David Turner | a56489e | 2000-02-13 13:41:56 +0000 | [diff] [blame] | 1041 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1042 | const FT_Frame_Field cmap_rec_fields[] = |
| 1043 | { |
| 1044 | FT_FRAME_START( 6 ), |
| 1045 | FT_FRAME_USHORT( TT_CMapTable, format ), |
| 1046 | FT_FRAME_USHORT( TT_CMapTable, length ), |
| 1047 | FT_FRAME_USHORT( TT_CMapTable, version ), |
| 1048 | FT_FRAME_END |
| 1049 | }; |
| 1050 | |
David Turner | a56489e | 2000-02-13 13:41:56 +0000 | [diff] [blame] | 1051 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1052 | FT_TRACE2(( "CMaps " )); |
| 1053 | |
| 1054 | error = face->goto_table( face, TTAG_cmap, stream, 0 ); |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1055 | if ( error ) |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1056 | { |
| 1057 | error = TT_Err_CMap_Table_Missing; |
| 1058 | goto Exit; |
| 1059 | } |
| 1060 | |
| 1061 | table_start = FILE_Pos(); |
| 1062 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1063 | if ( READ_Fields( cmap_fields, &cmap_dir ) ) |
| 1064 | goto Exit; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1065 | |
| 1066 | /* save space in face table for cmap tables */ |
| 1067 | if ( ALLOC_ARRAY( face->charmaps, |
| 1068 | cmap_dir.numCMaps, |
| 1069 | TT_CharMapRec ) ) |
| 1070 | goto Exit; |
| 1071 | |
| 1072 | face->num_charmaps = cmap_dir.numCMaps; |
| 1073 | { |
| 1074 | TT_CharMap charmap = face->charmaps; |
| 1075 | TT_CharMap limit = charmap + face->num_charmaps; |
| 1076 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1077 | |
David Turner | a56489e | 2000-02-13 13:41:56 +0000 | [diff] [blame] | 1078 | /* read the header of each charmap first */ |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1079 | if ( ACCESS_Frame( face->num_charmaps * 8L ) ) |
| 1080 | goto Exit; |
| 1081 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1082 | for ( ; charmap < limit; charmap++ ) |
| 1083 | { |
| 1084 | TT_CMapTable* cmap; |
| 1085 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1086 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1087 | charmap->root.face = (FT_Face)face; |
| 1088 | cmap = &charmap->cmap; |
| 1089 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1090 | cmap->loaded = FALSE; |
| 1091 | cmap->platformID = GET_UShort(); |
| 1092 | cmap->platformEncodingID = GET_UShort(); |
David Turner | a56489e | 2000-02-13 13:41:56 +0000 | [diff] [blame] | 1093 | cmap->offset = (TT_ULong)GET_Long(); |
| 1094 | } |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1095 | |
David Turner | a56489e | 2000-02-13 13:41:56 +0000 | [diff] [blame] | 1096 | FORGET_Frame(); |
David Turner | e49ab25 | 2000-05-16 23:44:38 +0000 | [diff] [blame] | 1097 | |
David Turner | a56489e | 2000-02-13 13:41:56 +0000 | [diff] [blame] | 1098 | /* now read the rest of each table */ |
| 1099 | for ( charmap = face->charmaps; charmap < limit; charmap++ ) |
| 1100 | { |
| 1101 | TT_CMapTable* cmap = &charmap->cmap; |
David Turner | e49ab25 | 2000-05-16 23:44:38 +0000 | [diff] [blame] | 1102 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1103 | |
David Turner | a56489e | 2000-02-13 13:41:56 +0000 | [diff] [blame] | 1104 | if ( FILE_Seek( table_start + (TT_Long)cmap->offset ) || |
| 1105 | READ_Fields( cmap_rec_fields, cmap ) ) |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1106 | goto Exit; |
David Turner | e49ab25 | 2000-05-16 23:44:38 +0000 | [diff] [blame] | 1107 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1108 | cmap->offset = FILE_Pos(); |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1109 | } |
| 1110 | } |
| 1111 | |
| 1112 | FT_TRACE2(( "loaded\n" )); |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1113 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1114 | Exit: |
| 1115 | return error; |
| 1116 | } |
| 1117 | |
| 1118 | |
| 1119 | /*************************************************************************/ |
| 1120 | /* */ |
| 1121 | /* <Function> */ |
| 1122 | /* TT_Load_OS2 */ |
| 1123 | /* */ |
| 1124 | /* <Description> */ |
| 1125 | /* Loads the OS2 table. */ |
| 1126 | /* */ |
| 1127 | /* <Input> */ |
| 1128 | /* face :: A handle to the target face object. */ |
| 1129 | /* stream :: A handle to the input stream. */ |
| 1130 | /* */ |
| 1131 | /* <Return> */ |
| 1132 | /* TrueType error code. 0 means success. */ |
| 1133 | /* */ |
| 1134 | LOCAL_FUNC |
| 1135 | TT_Error TT_Load_OS2( TT_Face face, |
| 1136 | FT_Stream stream ) |
| 1137 | { |
| 1138 | TT_Error error; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1139 | TT_OS2* os2; |
David Turner | b1677a8 | 2000-05-29 20:37:41 +0000 | [diff] [blame] | 1140 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1141 | const FT_Frame_Field os2_fields[] = |
| 1142 | { |
| 1143 | FT_FRAME_START( 78 ), |
| 1144 | FT_FRAME_USHORT( TT_OS2, version ), |
| 1145 | FT_FRAME_SHORT( TT_OS2, xAvgCharWidth ), |
| 1146 | FT_FRAME_USHORT( TT_OS2, usWeightClass ), |
| 1147 | FT_FRAME_USHORT( TT_OS2, usWidthClass ), |
| 1148 | FT_FRAME_SHORT( TT_OS2, fsType ), |
| 1149 | FT_FRAME_SHORT( TT_OS2, ySubscriptXSize ), |
| 1150 | FT_FRAME_SHORT( TT_OS2, ySubscriptYSize ), |
| 1151 | FT_FRAME_SHORT( TT_OS2, ySubscriptXOffset ), |
| 1152 | FT_FRAME_SHORT( TT_OS2, ySubscriptYOffset ), |
| 1153 | FT_FRAME_SHORT( TT_OS2, ySuperscriptXSize ), |
| 1154 | FT_FRAME_SHORT( TT_OS2, ySuperscriptYSize ), |
| 1155 | FT_FRAME_SHORT( TT_OS2, ySuperscriptXOffset ), |
| 1156 | FT_FRAME_SHORT( TT_OS2, ySuperscriptYOffset ), |
| 1157 | FT_FRAME_SHORT( TT_OS2, yStrikeoutSize ), |
| 1158 | FT_FRAME_SHORT( TT_OS2, yStrikeoutPosition ), |
| 1159 | FT_FRAME_SHORT( TT_OS2, sFamilyClass ), |
| 1160 | FT_FRAME_BYTE( TT_OS2, panose[0] ), |
| 1161 | FT_FRAME_BYTE( TT_OS2, panose[1] ), |
| 1162 | FT_FRAME_BYTE( TT_OS2, panose[2] ), |
| 1163 | FT_FRAME_BYTE( TT_OS2, panose[3] ), |
| 1164 | FT_FRAME_BYTE( TT_OS2, panose[4] ), |
| 1165 | FT_FRAME_BYTE( TT_OS2, panose[5] ), |
| 1166 | FT_FRAME_BYTE( TT_OS2, panose[6] ), |
| 1167 | FT_FRAME_BYTE( TT_OS2, panose[7] ), |
| 1168 | FT_FRAME_BYTE( TT_OS2, panose[8] ), |
| 1169 | FT_FRAME_BYTE( TT_OS2, panose[9] ), |
| 1170 | FT_FRAME_ULONG( TT_OS2, ulUnicodeRange1 ), |
| 1171 | FT_FRAME_ULONG( TT_OS2, ulUnicodeRange2 ), |
| 1172 | FT_FRAME_ULONG( TT_OS2, ulUnicodeRange3 ), |
| 1173 | FT_FRAME_ULONG( TT_OS2, ulUnicodeRange4 ), |
| 1174 | FT_FRAME_BYTE( TT_OS2, achVendID[0] ), |
| 1175 | FT_FRAME_BYTE( TT_OS2, achVendID[1] ), |
| 1176 | FT_FRAME_BYTE( TT_OS2, achVendID[2] ), |
| 1177 | FT_FRAME_BYTE( TT_OS2, achVendID[3] ), |
David Turner | a56489e | 2000-02-13 13:41:56 +0000 | [diff] [blame] | 1178 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1179 | FT_FRAME_USHORT( TT_OS2, fsSelection ), |
| 1180 | FT_FRAME_USHORT( TT_OS2, usFirstCharIndex ), |
| 1181 | FT_FRAME_USHORT( TT_OS2, usLastCharIndex ), |
| 1182 | FT_FRAME_SHORT( TT_OS2, sTypoAscender ), |
| 1183 | FT_FRAME_SHORT( TT_OS2, sTypoDescender ), |
| 1184 | FT_FRAME_SHORT( TT_OS2, sTypoLineGap ), |
| 1185 | FT_FRAME_USHORT( TT_OS2, usWinAscent ), |
| 1186 | FT_FRAME_USHORT( TT_OS2, usWinDescent ), |
| 1187 | FT_FRAME_END |
| 1188 | }; |
David Turner | e49ab25 | 2000-05-16 23:44:38 +0000 | [diff] [blame] | 1189 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1190 | const FT_Frame_Field os2_fields_extra[] = |
| 1191 | { |
| 1192 | FT_FRAME_START( 8 ), |
| 1193 | FT_FRAME_ULONG( TT_OS2, ulCodePageRange1 ), |
| 1194 | FT_FRAME_ULONG( TT_OS2, ulCodePageRange2 ), |
| 1195 | FT_FRAME_END |
| 1196 | }; |
David Turner | 1119bae | 2000-05-02 11:01:49 +0000 | [diff] [blame] | 1197 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1198 | const FT_Frame_Field os2_fields_extra2[] = |
| 1199 | { |
| 1200 | FT_FRAME_START( 10 ), |
| 1201 | FT_FRAME_SHORT( TT_OS2, sxHeight ), |
| 1202 | FT_FRAME_SHORT( TT_OS2, sCapHeight ), |
| 1203 | FT_FRAME_USHORT( TT_OS2, usDefaultChar ), |
| 1204 | FT_FRAME_USHORT( TT_OS2, usBreakChar ), |
| 1205 | FT_FRAME_USHORT( TT_OS2, usMaxContext ), |
| 1206 | FT_FRAME_END |
| 1207 | }; |
| 1208 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1209 | |
| 1210 | FT_TRACE2(( "OS/2 Table " )); |
| 1211 | |
| 1212 | /* We now support old Mac fonts where the OS/2 table doesn't */ |
| 1213 | /* exist. Simply put, we set the `version' field to 0xFFFF */ |
| 1214 | /* and test this value each time we need to access the table. */ |
| 1215 | error = face->goto_table( face, TTAG_OS2, stream, 0 ); |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1216 | if ( error ) |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1217 | { |
| 1218 | FT_TRACE2(( "is missing\n!" )); |
| 1219 | face->os2.version = 0xFFFF; |
| 1220 | error = TT_Err_Ok; |
| 1221 | goto Exit; |
| 1222 | } |
| 1223 | |
David Turner | a56489e | 2000-02-13 13:41:56 +0000 | [diff] [blame] | 1224 | os2 = &face->os2; |
| 1225 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1226 | if ( READ_Fields( os2_fields, os2 ) ) |
| 1227 | goto Exit; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1228 | |
| 1229 | os2->ulCodePageRange1 = 0; |
| 1230 | os2->ulCodePageRange2 = 0; |
| 1231 | |
| 1232 | if ( os2->version >= 0x0001 ) |
| 1233 | { |
| 1234 | /* only version 1 tables */ |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1235 | if ( READ_Fields( os2_fields_extra, os2 ) ) |
| 1236 | goto Exit; |
David Turner | 1119bae | 2000-05-02 11:01:49 +0000 | [diff] [blame] | 1237 | |
| 1238 | if ( os2->version >= 0x0002 ) |
| 1239 | { |
| 1240 | /* only version 2 tables */ |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1241 | if ( READ_Fields( os2_fields_extra2, os2 ) ) |
| 1242 | goto Exit; |
David Turner | 1119bae | 2000-05-02 11:01:49 +0000 | [diff] [blame] | 1243 | } |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1244 | } |
| 1245 | |
| 1246 | FT_TRACE2(( "loaded\n" )); |
| 1247 | |
| 1248 | Exit: |
| 1249 | return error; |
| 1250 | } |
| 1251 | |
| 1252 | |
| 1253 | /*************************************************************************/ |
| 1254 | /* */ |
| 1255 | /* <Function> */ |
| 1256 | /* TT_Load_Postscript */ |
| 1257 | /* */ |
| 1258 | /* <Description> */ |
| 1259 | /* Loads the Postscript table. */ |
| 1260 | /* */ |
| 1261 | /* <Input> */ |
| 1262 | /* face :: A handle to the target face object. */ |
| 1263 | /* stream :: A handle to the input stream. */ |
| 1264 | /* */ |
| 1265 | /* <Return> */ |
| 1266 | /* TrueType error code. 0 means success. */ |
| 1267 | /* */ |
| 1268 | LOCAL_FUNC |
| 1269 | TT_Error TT_Load_PostScript( TT_Face face, |
| 1270 | FT_Stream stream ) |
| 1271 | { |
| 1272 | TT_Error error; |
| 1273 | TT_Postscript* post = &face->postscript; |
David Turner | b1677a8 | 2000-05-29 20:37:41 +0000 | [diff] [blame] | 1274 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1275 | static const FT_Frame_Field post_fields[] = |
| 1276 | { |
| 1277 | FT_FRAME_START( 32 ), |
| 1278 | FT_FRAME_ULONG( TT_Postscript, FormatType ), |
| 1279 | FT_FRAME_ULONG( TT_Postscript, italicAngle ), |
| 1280 | FT_FRAME_SHORT( TT_Postscript, underlinePosition ), |
| 1281 | FT_FRAME_SHORT( TT_Postscript, underlineThickness ), |
| 1282 | FT_FRAME_ULONG( TT_Postscript, isFixedPitch ), |
| 1283 | FT_FRAME_ULONG( TT_Postscript, minMemType42 ), |
| 1284 | FT_FRAME_ULONG( TT_Postscript, maxMemType42 ), |
| 1285 | FT_FRAME_ULONG( TT_Postscript, minMemType1 ), |
| 1286 | FT_FRAME_ULONG( TT_Postscript, maxMemType1 ), |
| 1287 | FT_FRAME_END |
| 1288 | }; |
| 1289 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1290 | |
| 1291 | FT_TRACE2(( "PostScript " )); |
| 1292 | |
| 1293 | error = face->goto_table( face, TTAG_post, stream, 0 ); |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1294 | if ( error ) |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1295 | return TT_Err_Post_Table_Missing; |
| 1296 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1297 | if ( READ_Fields( post_fields, post ) ) |
| 1298 | return error; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1299 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1300 | /* we don't load the glyph names, we do that in another */ |
| 1301 | /* module (ttpost). */ |
| 1302 | FT_TRACE2(( "loaded\n" )); |
| 1303 | |
| 1304 | return TT_Err_Ok; |
| 1305 | } |
| 1306 | |
| 1307 | |
| 1308 | /*************************************************************************/ |
| 1309 | /* */ |
| 1310 | /* <Function> */ |
David Turner | 51179f0 | 2000-05-18 16:18:05 +0000 | [diff] [blame] | 1311 | /* TT_Load_PCLT */ |
| 1312 | /* */ |
| 1313 | /* <Description> */ |
| 1314 | /* Loads the PCL 5 Table. */ |
| 1315 | /* */ |
| 1316 | /* <Input> */ |
| 1317 | /* face :: A handle to the target face object. */ |
| 1318 | /* stream :: A handle to the input stream. */ |
| 1319 | /* */ |
| 1320 | /* <Return> */ |
| 1321 | /* TrueType error code. 0 means success. */ |
| 1322 | /* */ |
| 1323 | LOCAL_FUNC |
| 1324 | TT_Error TT_Load_PCLT( TT_Face face, |
| 1325 | FT_Stream stream ) |
| 1326 | { |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1327 | static const FT_Frame_Field pclt_fields[] = |
| 1328 | { |
| 1329 | FT_FRAME_START( 20 ), |
| 1330 | FT_FRAME_ULONG ( TT_PCLT, Version ), |
| 1331 | FT_FRAME_ULONG ( TT_PCLT, FontNumber ), |
| 1332 | FT_FRAME_USHORT( TT_PCLT, Pitch ), |
| 1333 | FT_FRAME_USHORT( TT_PCLT, xHeight ), |
| 1334 | FT_FRAME_USHORT( TT_PCLT, Style ), |
| 1335 | FT_FRAME_USHORT( TT_PCLT, TypeFamily ), |
| 1336 | FT_FRAME_USHORT( TT_PCLT, CapHeight ), |
| 1337 | FT_FRAME_END |
| 1338 | }; |
Werner Lemberg | 920d41e | 2000-06-05 14:32:32 +0000 | [diff] [blame] | 1339 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1340 | static const FT_Frame_Field pclt_fields2[] = |
| 1341 | { |
| 1342 | FT_FRAME_START( 4 ), |
| 1343 | FT_FRAME_CHAR( TT_PCLT, StrokeWeight ), |
| 1344 | FT_FRAME_CHAR( TT_PCLT, WidthType ), |
| 1345 | FT_FRAME_BYTE( TT_PCLT, SerifStyle ), |
| 1346 | FT_FRAME_BYTE( TT_PCLT, Reserved ), |
| 1347 | FT_FRAME_END |
| 1348 | }; |
Werner Lemberg | 920d41e | 2000-06-05 14:32:32 +0000 | [diff] [blame] | 1349 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1350 | TT_Error error; |
| 1351 | TT_PCLT* pclt = &face->pclt; |
| 1352 | |
Werner Lemberg | 920d41e | 2000-06-05 14:32:32 +0000 | [diff] [blame] | 1353 | |
David Turner | 51179f0 | 2000-05-18 16:18:05 +0000 | [diff] [blame] | 1354 | FT_TRACE2(( "PCLT " )); |
| 1355 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1356 | /* optional table */ |
| 1357 | error = face->goto_table( face, TTAG_PCLT, stream, 0 ); |
| 1358 | if ( error ) |
| 1359 | { |
| 1360 | FT_TRACE2(( "missing (optional)\n" )); |
| 1361 | pclt->Version = 0; |
| 1362 | return TT_Err_Ok; |
| 1363 | } |
Werner Lemberg | 920d41e | 2000-06-05 14:32:32 +0000 | [diff] [blame] | 1364 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1365 | if ( READ_Fields( pclt_fields, pclt ) || |
| 1366 | FILE_Read ( pclt->TypeFace, 16 ) || |
| 1367 | FILE_Read ( pclt->CharacterComplement, 8 ) || |
| 1368 | FILE_Read ( pclt->FileName, 6 ) || |
| 1369 | READ_Fields( pclt_fields2, pclt ) ) |
David Turner | 51179f0 | 2000-05-18 16:18:05 +0000 | [diff] [blame] | 1370 | goto Exit; |
Werner Lemberg | 920d41e | 2000-06-05 14:32:32 +0000 | [diff] [blame] | 1371 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1372 | FT_TRACE2(( "loaded\n" )); |
| 1373 | |
Werner Lemberg | 920d41e | 2000-06-05 14:32:32 +0000 | [diff] [blame] | 1374 | Exit: |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1375 | return error; |
| 1376 | } |
| 1377 | |
David Turner | 51179f0 | 2000-05-18 16:18:05 +0000 | [diff] [blame] | 1378 | |
| 1379 | /*************************************************************************/ |
| 1380 | /* */ |
| 1381 | /* <Function> */ |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1382 | /* TT_Load_Gasp */ |
| 1383 | /* */ |
| 1384 | /* <Description> */ |
| 1385 | /* Loads the `GASP' table into a face object. */ |
| 1386 | /* */ |
| 1387 | /* <Input> */ |
| 1388 | /* face :: A handle to the target face object. */ |
| 1389 | /* stream :: The input stream. */ |
| 1390 | /* */ |
| 1391 | /* <Return> */ |
| 1392 | /* TrueType error code. 0 means success. */ |
| 1393 | /* */ |
| 1394 | LOCAL_FUNC |
| 1395 | TT_Error TT_Load_Gasp( TT_Face face, |
| 1396 | FT_Stream stream ) |
| 1397 | { |
| 1398 | TT_Error error; |
| 1399 | FT_Memory memory = stream->memory; |
| 1400 | |
| 1401 | TT_UInt j,num_ranges; |
| 1402 | TT_GaspRange* gaspranges; |
| 1403 | |
| 1404 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1405 | FT_TRACE2(( "TT_Load_Gasp: %08p\n", face )); |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1406 | |
| 1407 | /* the gasp table is optional */ |
| 1408 | error = face->goto_table( face, TTAG_gasp, stream, 0 ); |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1409 | if ( error ) |
| 1410 | return TT_Err_Ok; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1411 | |
| 1412 | if ( ACCESS_Frame( 4L ) ) |
| 1413 | goto Exit; |
| 1414 | |
| 1415 | face->gasp.version = GET_UShort(); |
| 1416 | face->gasp.numRanges = GET_UShort(); |
| 1417 | |
| 1418 | FORGET_Frame(); |
| 1419 | |
| 1420 | num_ranges = face->gasp.numRanges; |
| 1421 | FT_TRACE3(( "number of ranges = %d\n", num_ranges )); |
| 1422 | |
| 1423 | if ( ALLOC_ARRAY( gaspranges, num_ranges, TT_GaspRange ) || |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1424 | ACCESS_Frame( num_ranges * 4L ) ) |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1425 | goto Exit; |
| 1426 | |
| 1427 | face->gasp.gaspRanges = gaspranges; |
| 1428 | |
| 1429 | for ( j = 0; j < num_ranges; j++ ) |
| 1430 | { |
| 1431 | gaspranges[j].maxPPEM = GET_UShort(); |
| 1432 | gaspranges[j].gaspFlag = GET_UShort(); |
| 1433 | |
| 1434 | FT_TRACE3(( " [max:%d flag:%d]", |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1435 | gaspranges[j].maxPPEM, |
| 1436 | gaspranges[j].gaspFlag )); |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1437 | } |
| 1438 | FT_TRACE3(( "\n" )); |
| 1439 | |
| 1440 | FORGET_Frame(); |
| 1441 | FT_TRACE2(( "GASP loaded\n" )); |
| 1442 | |
| 1443 | Exit: |
| 1444 | return error; |
| 1445 | } |
| 1446 | |
| 1447 | |
| 1448 | /*************************************************************************/ |
| 1449 | /* */ |
| 1450 | /* <Function> */ |
| 1451 | /* TT_Load_Kern */ |
| 1452 | /* */ |
| 1453 | /* <Description> */ |
| 1454 | /* Loads the first kerning table with format 0 in the font. Only */ |
| 1455 | /* accepts the first horizontal kerning table. Developers should use */ |
| 1456 | /* the `ftxkern' extension to access other kerning tables in the font */ |
| 1457 | /* file, if they really want to. */ |
| 1458 | /* */ |
| 1459 | /* <Input> */ |
| 1460 | /* face :: A handle to the target face object. */ |
| 1461 | /* stream :: The input stream. */ |
| 1462 | /* */ |
| 1463 | /* <Return> */ |
| 1464 | /* TrueType error code. 0 means success. */ |
| 1465 | /* */ |
| 1466 | LOCAL_FUNC |
| 1467 | TT_Error TT_Load_Kern( TT_Face face, |
| 1468 | FT_Stream stream ) |
| 1469 | { |
| 1470 | TT_Error error; |
| 1471 | FT_Memory memory = stream->memory; |
| 1472 | |
| 1473 | TT_UInt n, num_tables, version; |
| 1474 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1475 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1476 | /* the kern table is optional. exit silently if it is missing */ |
| 1477 | error = face->goto_table( face, TTAG_kern, stream, 0 ); |
| 1478 | if ( error ) |
| 1479 | return TT_Err_Ok; |
| 1480 | |
| 1481 | if ( ACCESS_Frame( 4L ) ) |
| 1482 | goto Exit; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1483 | |
| 1484 | version = GET_UShort(); |
| 1485 | num_tables = GET_UShort(); |
| 1486 | |
| 1487 | FORGET_Frame(); |
| 1488 | |
| 1489 | for ( n = 0; n < num_tables; n++ ) |
| 1490 | { |
| 1491 | TT_UInt coverage; |
| 1492 | TT_UInt length; |
| 1493 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1494 | |
| 1495 | if ( ACCESS_Frame( 6L ) ) |
| 1496 | goto Exit; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1497 | |
| 1498 | version = GET_UShort(); /* version */ |
| 1499 | length = GET_UShort() - 6; /* substract header length */ |
| 1500 | coverage = GET_UShort(); |
| 1501 | |
| 1502 | FORGET_Frame(); |
David Turner | e49ab25 | 2000-05-16 23:44:38 +0000 | [diff] [blame] | 1503 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1504 | if ( coverage == 0x0001 ) |
| 1505 | { |
| 1506 | TT_UInt num_pairs; |
| 1507 | TT_Kern_0_Pair* pair; |
| 1508 | TT_Kern_0_Pair* limit; |
| 1509 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1510 | |
| 1511 | /* found a horizontal format 0 kerning table! */ |
| 1512 | if ( ACCESS_Frame( 8L ) ) |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1513 | goto Exit; |
| 1514 | |
| 1515 | num_pairs = GET_UShort(); |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1516 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1517 | /* skip the rest */ |
| 1518 | |
| 1519 | FORGET_Frame(); |
| 1520 | |
| 1521 | /* allocate array of kerning pairs */ |
| 1522 | if ( ALLOC_ARRAY( face->kern_pairs, num_pairs, TT_Kern_0_Pair ) || |
| 1523 | ACCESS_Frame( 6L * num_pairs ) ) |
| 1524 | goto Exit; |
| 1525 | |
| 1526 | pair = face->kern_pairs; |
| 1527 | limit = pair + num_pairs; |
| 1528 | for ( ; pair < limit; pair++ ) |
| 1529 | { |
| 1530 | pair->left = GET_UShort(); |
| 1531 | pair->right = GET_UShort(); |
| 1532 | pair->value = GET_UShort(); |
| 1533 | } |
| 1534 | |
| 1535 | FORGET_Frame(); |
| 1536 | |
| 1537 | face->num_kern_pairs = num_pairs; |
| 1538 | face->kern_table_index = n; |
| 1539 | goto Exit; |
| 1540 | } |
David Turner | e49ab25 | 2000-05-16 23:44:38 +0000 | [diff] [blame] | 1541 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1542 | if ( FILE_Skip( length ) ) |
| 1543 | goto Exit; |
| 1544 | } |
| 1545 | |
| 1546 | /* no kern table found -- doesn't matter */ |
| 1547 | face->kern_table_index = -1; |
| 1548 | face->num_kern_pairs = 0; |
| 1549 | face->kern_pairs = NULL; |
| 1550 | |
| 1551 | Exit: |
| 1552 | return error; |
| 1553 | } |
| 1554 | |
| 1555 | |
| 1556 | /*************************************************************************/ |
| 1557 | /* */ |
| 1558 | /* <Function> */ |
| 1559 | /* TT_Load_Hdmx */ |
| 1560 | /* */ |
| 1561 | /* <Description> */ |
| 1562 | /* Loads the horizontal device metrics table. */ |
| 1563 | /* */ |
| 1564 | /* <Input> */ |
| 1565 | /* face :: A handle to the target face object. */ |
| 1566 | /* stream :: A handle to the input stream. */ |
| 1567 | /* */ |
| 1568 | /* <Return> */ |
| 1569 | /* TrueType error code. 0 means success. */ |
| 1570 | /* */ |
| 1571 | LOCAL_FUNC |
David Turner | e49ab25 | 2000-05-16 23:44:38 +0000 | [diff] [blame] | 1572 | TT_Error TT_Load_Hdmx( TT_Face face, |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1573 | FT_Stream stream ) |
| 1574 | { |
| 1575 | TT_Error error; |
| 1576 | FT_Memory memory = stream->memory; |
| 1577 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1578 | TT_Hdmx* hdmx = &face->hdmx; |
| 1579 | TT_Long num_glyphs; |
| 1580 | TT_Long record_size; |
| 1581 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1582 | |
| 1583 | hdmx->version = 0; |
| 1584 | hdmx->num_records = 0; |
| 1585 | hdmx->records = 0; |
| 1586 | |
| 1587 | /* this table is optional */ |
| 1588 | error = face->goto_table( face, TTAG_hdmx, stream, 0 ); |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1589 | if ( error ) |
| 1590 | return TT_Err_Ok; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1591 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1592 | if ( ACCESS_Frame( 8L ) ) |
| 1593 | goto Exit; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1594 | |
| 1595 | hdmx->version = GET_UShort(); |
| 1596 | hdmx->num_records = GET_Short(); |
| 1597 | record_size = GET_Long(); |
| 1598 | |
| 1599 | FORGET_Frame(); |
| 1600 | |
| 1601 | /* Only recognize format 0 */ |
| 1602 | if ( hdmx->version != 0 ) |
| 1603 | goto Exit; |
| 1604 | |
| 1605 | if ( ALLOC_ARRAY( hdmx->records, hdmx->num_records, TT_HdmxRec ) ) |
| 1606 | goto Exit; |
| 1607 | |
| 1608 | num_glyphs = face->root.num_glyphs; |
| 1609 | record_size -= num_glyphs + 2; |
| 1610 | |
| 1611 | { |
| 1612 | TT_HdmxRec* cur = hdmx->records; |
| 1613 | TT_HdmxRec* limit = cur + hdmx->num_records; |
| 1614 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1615 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1616 | for ( ; cur < limit; cur++ ) |
| 1617 | { |
| 1618 | /* read record */ |
| 1619 | if ( READ_Byte( cur->ppem ) || |
| 1620 | READ_Byte( cur->max_width ) ) |
| 1621 | goto Exit; |
David Turner | e49ab25 | 2000-05-16 23:44:38 +0000 | [diff] [blame] | 1622 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1623 | if ( ALLOC( cur->widths, num_glyphs ) || |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1624 | FILE_Read( cur->widths, num_glyphs ) ) |
| 1625 | goto Exit; |
David Turner | e49ab25 | 2000-05-16 23:44:38 +0000 | [diff] [blame] | 1626 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1627 | /* skip padding bytes */ |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1628 | if ( record_size > 0 && FILE_Skip( record_size ) ) |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1629 | goto Exit; |
| 1630 | } |
| 1631 | } |
| 1632 | |
| 1633 | Exit: |
| 1634 | return error; |
| 1635 | } |
| 1636 | |
| 1637 | |
| 1638 | /*************************************************************************/ |
| 1639 | /* */ |
| 1640 | /* <Function> */ |
| 1641 | /* TT_Free_Hdmx */ |
| 1642 | /* */ |
| 1643 | /* <Description> */ |
| 1644 | /* Frees the horizontal device metrics table. */ |
| 1645 | /* */ |
| 1646 | /* <Input> */ |
| 1647 | /* face :: A handle to the target face object. */ |
| 1648 | /* */ |
| 1649 | LOCAL_FUNC |
| 1650 | void TT_Free_Hdmx( TT_Face face ) |
| 1651 | { |
| 1652 | if ( face ) |
| 1653 | { |
| 1654 | TT_Int n; |
| 1655 | FT_Memory memory = face->root.driver->memory; |
| 1656 | |
Werner Lemberg | 4e6dd85 | 2000-06-05 05:26:15 +0000 | [diff] [blame] | 1657 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1658 | for ( n = 0; n < face->hdmx.num_records; n++ ) |
| 1659 | FREE( face->hdmx.records[n].widths ); |
| 1660 | |
| 1661 | FREE( face->hdmx.records ); |
| 1662 | face->hdmx.num_records = 0; |
| 1663 | } |
| 1664 | } |
| 1665 | |
| 1666 | |
| 1667 | /* END */ |