David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1 | /******************************************************************* |
| 2 | * |
| 3 | * t1gload.c 1.0 |
| 4 | * |
| 5 | * Type1 Glyph Loader. |
| 6 | * |
| 7 | * Copyright 1996-1999 by |
| 8 | * David Turner, Robert Wilhelm, and Werner Lemberg. |
| 9 | * |
| 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. |
| 15 | * |
| 16 | ******************************************************************/ |
| 17 | |
| 18 | #include <t1gload.h> |
David Turner | efce08d | 2000-05-11 18:23:52 +0000 | [diff] [blame] | 19 | #include <freetype/internal/ftdebug.h> |
| 20 | #include <freetype/internal/ftstream.h> |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 21 | |
| 22 | #ifndef T1_CONFIG_OPTION_DISABLE_HINTER |
| 23 | #include <t1hinter.h> |
| 24 | #endif |
| 25 | |
| 26 | /**********************************************************************/ |
| 27 | /**********************************************************************/ |
| 28 | /**********************************************************************/ |
| 29 | /********** *********/ |
| 30 | /********** *********/ |
| 31 | /********** GENERIC CHARSTRINGS PARSING *********/ |
| 32 | /********** *********/ |
| 33 | /********** *********/ |
| 34 | /**********************************************************************/ |
| 35 | /**********************************************************************/ |
| 36 | /**********************************************************************/ |
| 37 | |
| 38 | /********************************************************************* |
| 39 | * |
| 40 | * <Function> |
| 41 | * T1_Init_Builder |
| 42 | * |
| 43 | * <Description> |
| 44 | * Initialise a given glyph builder. |
| 45 | * |
| 46 | * <Input> |
| 47 | * builder :: glyph builder to initialise |
| 48 | * face :: current face object |
| 49 | * size :: current size object |
| 50 | * glyph :: current glyph object |
| 51 | * funcs :: glyph builder functions (or "methods"). |
| 52 | * |
| 53 | *********************************************************************/ |
| 54 | |
| 55 | EXPORT_FUNC |
| 56 | void T1_Init_Builder( T1_Builder* builder, |
| 57 | T1_Face face, |
| 58 | T1_Size size, |
| 59 | T1_GlyphSlot glyph, |
| 60 | const T1_Builder_Funcs* funcs ) |
| 61 | { |
| 62 | builder->funcs = *funcs; |
| 63 | builder->path_begun = 0; |
| 64 | builder->load_points = 1; |
| 65 | |
| 66 | builder->face = face; |
| 67 | builder->size = size; |
| 68 | builder->glyph = glyph; |
| 69 | builder->memory = face->root.memory; |
| 70 | |
| 71 | if (glyph) |
| 72 | { |
| 73 | builder->base = glyph->root.outline; |
| 74 | builder->max_points = glyph->max_points; |
| 75 | builder->max_contours = glyph->max_contours; |
| 76 | } |
| 77 | |
| 78 | if (size) |
| 79 | { |
| 80 | builder->scale_x = size->root.metrics.x_scale; |
| 81 | builder->scale_y = size->root.metrics.y_scale; |
| 82 | } |
| 83 | |
| 84 | builder->pos_x = 0; |
| 85 | builder->pos_y = 0; |
| 86 | |
| 87 | builder->left_bearing.x = 0; |
| 88 | builder->left_bearing.y = 0; |
| 89 | builder->advance.x = 0; |
| 90 | builder->advance.y = 0; |
| 91 | |
| 92 | builder->base.n_points = 0; |
| 93 | builder->base.n_contours = 0; |
| 94 | builder->current = builder->base; |
| 95 | |
| 96 | builder->pass = 0; |
| 97 | builder->hint_point = 0; |
| 98 | } |
| 99 | |
| 100 | |
| 101 | /********************************************************************* |
| 102 | * |
| 103 | * <Function> |
| 104 | * T1_Done_Builder |
| 105 | * |
| 106 | * <Description> |
| 107 | * Finalise a given glyph builder. Its content can still be |
| 108 | * used after the call, but the function saves important information |
| 109 | * within the corresponding glyph slot. |
| 110 | * |
| 111 | * <Input> |
| 112 | * builder :: glyph builder to initialise |
| 113 | * |
| 114 | *********************************************************************/ |
| 115 | |
| 116 | EXPORT_FUNC |
| 117 | void T1_Done_Builder( T1_Builder* builder ) |
| 118 | { |
| 119 | T1_GlyphSlot glyph = builder->glyph; |
| 120 | |
| 121 | if (glyph) |
| 122 | { |
| 123 | glyph->root.outline = builder->base; |
| 124 | glyph->max_points = builder->max_points; |
| 125 | glyph->max_contours = builder->max_contours; |
| 126 | } |
| 127 | } |
| 128 | |
| 129 | |
| 130 | |
| 131 | /********************************************************************* |
| 132 | * |
| 133 | * <Function> |
| 134 | * T1_Init_Decoder |
| 135 | * |
| 136 | * <Description> |
| 137 | * Initialise a given Type 1 decoder for parsing |
| 138 | * |
| 139 | * <Input> |
| 140 | * decoder :: Type 1 decoder to initialise |
| 141 | * funcs :: hinter functions interface |
| 142 | * |
| 143 | *********************************************************************/ |
| 144 | |
| 145 | EXPORT_FUNC |
| 146 | void T1_Init_Decoder( T1_Decoder* decoder, |
| 147 | const T1_Hinter_Funcs* funcs ) |
| 148 | { |
| 149 | decoder->hinter = *funcs; /* copy hinter interface */ |
| 150 | decoder->top = 0; |
| 151 | decoder->zone = 0; |
| 152 | |
| 153 | decoder->flex_state = 0; |
| 154 | decoder->num_flex_vectors = 0; |
| 155 | |
| 156 | /* Clear loader */ |
| 157 | MEM_Set( &decoder->builder, 0, sizeof(decoder->builder) ); |
| 158 | } |
| 159 | |
| 160 | |
| 161 | /********************************************************************* |
| 162 | * |
| 163 | * <Function> |
| 164 | * lookup_glyph_by_stdcharcode |
| 165 | * |
| 166 | * <Description> |
| 167 | * Lookup a given glyph by its StandardEncoding charcode. Used |
| 168 | * to implement the SEAC Type 1 operator. |
| 169 | * |
| 170 | * <Input> |
| 171 | * face :: current face object |
| 172 | * charcode :: charcode to look for |
| 173 | * |
| 174 | * <Return> |
| 175 | * glyph index in font face. Returns -1 if the corresponding |
| 176 | * glyph wasn't found. |
| 177 | * |
| 178 | *********************************************************************/ |
| 179 | |
| 180 | static |
| 181 | T1_Int lookup_glyph_by_stdcharcode( T1_Face face, |
| 182 | T1_Int charcode ) |
| 183 | { |
David Turner | 3188a3a | 2000-02-13 13:34:18 +0000 | [diff] [blame] | 184 | T1_Int n; |
| 185 | const T1_String* glyph_name; |
| 186 | PSNames_Interface* psnames = (PSNames_Interface*)face->psnames; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 187 | |
| 188 | /* check range of standard char code */ |
| 189 | if (charcode < 0 || charcode > 255) |
| 190 | return -1; |
| 191 | |
David Turner | 3188a3a | 2000-02-13 13:34:18 +0000 | [diff] [blame] | 192 | glyph_name = psnames->adobe_std_strings( |
| 193 | psnames->adobe_std_encoding[charcode]); |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 194 | |
David Turner | 76bbd57 | 2000-01-27 13:35:16 +0000 | [diff] [blame] | 195 | for ( n = 0; n < face->type1.num_glyphs; n++ ) |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 196 | { |
David Turner | 76bbd57 | 2000-01-27 13:35:16 +0000 | [diff] [blame] | 197 | T1_String* name = (T1_String*)face->type1.glyph_names[n]; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 198 | |
| 199 | if ( name && strcmp(name,glyph_name) == 0 ) |
| 200 | return n; |
| 201 | } |
| 202 | |
| 203 | return -1; |
| 204 | } |
| 205 | |
| 206 | |
| 207 | /********************************************************************* |
| 208 | * |
| 209 | * <Function> |
| 210 | * t1operator_seac |
| 211 | * |
| 212 | * <Description> |
| 213 | * Implements the "seac" Type 1 operator for a Type 1 decoder |
| 214 | * |
| 215 | * <Input> |
| 216 | * decoder :: current Type 1 decoder |
| 217 | * asb :: accent's side bearing |
| 218 | * adx :: horizontal position of accent |
| 219 | * ady :: vertical position of accent |
| 220 | * bchar :: base character's StandardEncoding charcode |
| 221 | * achar :: accent character's StandardEncoding charcode |
| 222 | * |
| 223 | * <Return> |
| 224 | * Error code. 0 means success. |
| 225 | * |
| 226 | *********************************************************************/ |
| 227 | |
| 228 | static |
| 229 | T1_Error t1operator_seac( T1_Decoder* decoder, |
| 230 | T1_Pos asb, |
| 231 | T1_Pos adx, |
| 232 | T1_Pos ady, |
| 233 | T1_Int bchar, |
| 234 | T1_Int achar ) |
| 235 | { |
| 236 | T1_Error error; |
| 237 | T1_Face face = decoder->builder.face; |
| 238 | T1_Int bchar_index, achar_index, n_base_points; |
| 239 | FT_Outline* cur = &decoder->builder.current; |
| 240 | FT_Outline* base = &decoder->builder.base; |
| 241 | T1_Vector left_bearing, advance; |
David Turner | 76bbd57 | 2000-01-27 13:35:16 +0000 | [diff] [blame] | 242 | T1_Font* type1 = &face->type1; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 243 | |
| 244 | bchar_index = lookup_glyph_by_stdcharcode( face, bchar ); |
| 245 | achar_index = lookup_glyph_by_stdcharcode( face, achar ); |
| 246 | |
| 247 | if (bchar_index < 0 || achar_index < 0) |
| 248 | { |
| 249 | FT_ERROR(( "T1.Parse_Seac : invalid seac character code arguments\n" )); |
| 250 | return T1_Err_Syntax_Error; |
| 251 | } |
| 252 | |
| 253 | /* First load "bchar" in builder */ |
| 254 | /* now load the unscaled outline */ |
| 255 | cur->n_points = 0; |
| 256 | cur->n_contours = 0; |
| 257 | cur->points = base->points + base->n_points; |
David Turner | ed7f62a | 2000-03-28 11:19:28 +0000 | [diff] [blame] | 258 | cur->tags = base->tags + base->n_points; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 259 | cur->contours = base->contours + base->n_contours; |
| 260 | |
| 261 | error = T1_Parse_CharStrings( decoder, |
David Turner | 76bbd57 | 2000-01-27 13:35:16 +0000 | [diff] [blame] | 262 | type1->charstrings [bchar_index], |
| 263 | type1->charstrings_len[bchar_index], |
| 264 | type1->num_subrs, |
| 265 | type1->subrs, |
| 266 | type1->subrs_len ); |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 267 | if (error) return error; |
| 268 | |
| 269 | n_base_points = cur->n_points; |
| 270 | |
David Turner | ed7f62a | 2000-03-28 11:19:28 +0000 | [diff] [blame] | 271 | if ( decoder->builder.no_recurse ) |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 272 | { |
David Turner | ed7f62a | 2000-03-28 11:19:28 +0000 | [diff] [blame] | 273 | /* if we're trying to load a composite glyph, do not load the */ |
| 274 | /* accent character and return the array of subglyphs.. */ |
| 275 | FT_GlyphSlot glyph = (FT_GlyphSlot)decoder->builder.glyph; |
| 276 | FT_SubGlyph* subg; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 277 | |
David Turner | ed7f62a | 2000-03-28 11:19:28 +0000 | [diff] [blame] | 278 | /* reallocate subglyph array if necessary */ |
| 279 | if (glyph->max_subglyphs < 2) |
| 280 | { |
| 281 | FT_Memory memory = decoder->builder.face->root.memory; |
| 282 | |
| 283 | if ( REALLOC_ARRAY( glyph->subglyphs, glyph->max_subglyphs, |
| 284 | 2, FT_SubGlyph ) ) |
| 285 | return error; |
| 286 | |
| 287 | glyph->max_subglyphs = 2; |
| 288 | } |
| 289 | |
| 290 | subg = glyph->subglyphs; |
| 291 | |
| 292 | /* subglyph 0 = base character */ |
| 293 | subg->index = bchar_index; |
| 294 | subg->flags = FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES | |
| 295 | FT_SUBGLYPH_FLAG_USE_MY_METRICS; |
| 296 | subg->arg1 = 0; |
| 297 | subg->arg2 = 0; |
| 298 | subg++; |
| 299 | |
| 300 | /* subglyph 1 = accent character */ |
| 301 | subg->index = achar_index; |
| 302 | subg->flags = FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES; |
| 303 | subg->arg1 = adx - asb; |
| 304 | subg->arg2 = ady; |
| 305 | |
| 306 | /* set up remaining glyph fields */ |
| 307 | glyph->num_subglyphs = 2; |
| 308 | glyph->format = ft_glyph_format_composite; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 309 | } |
David Turner | ed7f62a | 2000-03-28 11:19:28 +0000 | [diff] [blame] | 310 | else |
| 311 | { |
| 312 | /* save the left bearing and width of the base character */ |
| 313 | /* as they will be erased by the next load.. */ |
| 314 | left_bearing = decoder->builder.left_bearing; |
| 315 | advance = decoder->builder.advance; |
| 316 | |
| 317 | decoder->builder.left_bearing.x = 0; |
| 318 | decoder->builder.left_bearing.y = 0; |
| 319 | |
| 320 | /* Now load "achar" on top of */ |
| 321 | /* the base outline */ |
| 322 | /* */ |
| 323 | cur->n_points = 0; |
| 324 | cur->n_contours = 0; |
| 325 | cur->points = base->points + base->n_points; |
| 326 | cur->tags = base->tags + base->n_points; |
| 327 | cur->contours = base->contours + base->n_contours; |
| 328 | |
| 329 | error = T1_Parse_CharStrings( decoder, |
| 330 | type1->charstrings [achar_index], |
| 331 | type1->charstrings_len[achar_index], |
| 332 | type1->num_subrs, |
| 333 | type1->subrs, |
| 334 | type1->subrs_len ); |
| 335 | if (error) return error; |
| 336 | |
| 337 | /* adjust contours in accented character outline */ |
| 338 | { |
| 339 | T1_Int n; |
| 340 | |
| 341 | for ( n = 0; n < cur->n_contours; n++ ) |
| 342 | cur->contours[n] += n_base_points; |
| 343 | } |
| 344 | |
| 345 | /* restore the left side bearing and */ |
| 346 | /* advance width of the base character */ |
| 347 | decoder->builder.left_bearing = left_bearing; |
| 348 | decoder->builder.advance = advance; |
| 349 | |
| 350 | /* Finally, move the accent */ |
| 351 | FT_Outline_Translate( cur, adx - asb, ady ); |
| 352 | } |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 353 | return T1_Err_Ok; |
| 354 | } |
| 355 | |
| 356 | /********************************************************************* |
| 357 | * |
| 358 | * <Function> |
| 359 | * t1operator_flex |
| 360 | * |
| 361 | * <Description> |
| 362 | * Implements the "flex" Type 1 operator for a Type 1 decoder |
| 363 | * |
| 364 | * <Input> |
| 365 | * decoder :: current Type 1 decoder |
| 366 | * threshold :: threshold |
| 367 | * end_x :: position of final flex point |
| 368 | * end_y :: position of final flex point |
| 369 | * |
| 370 | * <Return> |
| 371 | * Error code. 0 means success. |
| 372 | * |
| 373 | *********************************************************************/ |
| 374 | |
| 375 | static |
| 376 | T1_Error t1operator_flex( T1_Decoder* decoder, |
| 377 | T1_Pos threshold, |
| 378 | T1_Pos end_x, |
| 379 | T1_Pos end_y ) |
| 380 | { |
| 381 | T1_Vector vec; |
| 382 | T1_Vector* flex = decoder->flex_vectors; |
| 383 | T1_Int n; |
| 384 | |
| 385 | /* we don't even try to test the threshold in the non-hinting */ |
| 386 | /* builder, even if the flex operator is said to be a path */ |
| 387 | /* construction statement in the specification. This is better */ |
| 388 | /* left to the hinter.. */ |
| 389 | |
| 390 | flex = decoder->flex_vectors; |
| 391 | vec = *flex++; |
| 392 | |
| 393 | for ( n = 0; n < 6; n++ ) |
| 394 | { |
| 395 | flex->x += vec.x; |
| 396 | flex->y += vec.y; |
| 397 | |
| 398 | vec = *flex++; |
| 399 | } |
| 400 | |
| 401 | |
| 402 | (void)threshold; |
| 403 | (void)end_x; |
| 404 | (void)end_y; |
| 405 | |
| 406 | flex = decoder->flex_vectors; |
| 407 | |
| 408 | return decoder->builder.funcs.rcurve_to( &decoder->builder, |
| 409 | flex[0].x, flex[0].y, |
| 410 | flex[1].x, flex[1].y, |
| 411 | flex[2].x, flex[2].y ) || |
| 412 | |
| 413 | decoder->builder.funcs.rcurve_to( &decoder->builder, |
| 414 | flex[3].x, flex[3].y, |
| 415 | flex[4].x, flex[4].y, |
| 416 | flex[5].x, flex[5].y ); |
| 417 | } |
| 418 | |
| 419 | |
| 420 | /********************************************************************* |
| 421 | * |
| 422 | * <Function> |
| 423 | * T1_Parse_CharStrings |
| 424 | * |
| 425 | * <Description> |
| 426 | * Parses a given Type 1 charstrings program |
| 427 | * |
| 428 | * <Input> |
| 429 | * decoder :: current Type 1 decoder |
| 430 | * charstring_base :: base of the charstring stream |
| 431 | * charstring_len :: length in bytes of the charstring stream |
| 432 | * num_subrs :: number of sub-routines |
| 433 | * subrs_base :: array of sub-routines addresses |
| 434 | * subrs_len :: array of sub-routines lengths |
| 435 | * |
| 436 | * <Return> |
| 437 | * Error code. 0 means success. |
| 438 | * |
| 439 | *********************************************************************/ |
| 440 | |
| 441 | EXPORT_FUNC |
| 442 | T1_Error T1_Parse_CharStrings( T1_Decoder* decoder, |
| 443 | T1_Byte* charstring_base, |
| 444 | T1_Int charstring_len, |
| 445 | T1_Int num_subrs, |
| 446 | T1_Byte** subrs_base, |
| 447 | T1_Int* subrs_len ) |
| 448 | { |
| 449 | T1_Error error; |
| 450 | T1_Decoder_Zone* zone; |
| 451 | T1_Byte* ip; |
| 452 | T1_Byte* limit; |
| 453 | T1_Builder* builder = &decoder->builder; |
| 454 | T1_Builder_Funcs* builds = &builder->funcs; |
| 455 | T1_Hinter_Funcs* hints = &decoder->hinter; |
| 456 | |
| 457 | static const T1_Int args_count[ op_max ] = |
| 458 | { |
| 459 | 0, /* none */ |
| 460 | 0, /* endchar */ |
| 461 | 2, /* hsbw */ |
| 462 | 5, /* seac */ |
| 463 | 4, /* sbw */ |
| 464 | 0, /* closepath */ |
| 465 | 1, /* hlineto */ |
| 466 | 1, /* hmoveto */ |
| 467 | 4, /* hvcurveto */ |
| 468 | 2, /* rlineto */ |
| 469 | 2, /* rmoveto */ |
| 470 | 6, /* rrcurveto */ |
| 471 | 4, /* vhcurveto */ |
| 472 | 1, /* vlineto */ |
| 473 | 1, /* vmoveto */ |
| 474 | 0, /* dotsection */ |
| 475 | 2, /* hstem */ |
| 476 | 6, /* hstem3 */ |
| 477 | 2, /* vstem */ |
| 478 | 6, /* vstem3 */ |
| 479 | 2, /* div */ |
| 480 | -1, /* callothersubr */ |
| 481 | 1, /* callsubr */ |
| 482 | 0, /* pop */ |
| 483 | 0, /* return */ |
| 484 | 2 /* setcurrentpoint */ |
| 485 | }; |
| 486 | |
| 487 | /* First of all, initialise the decoder */ |
| 488 | decoder->top = decoder->stack; |
| 489 | decoder->zone = decoder->zones; |
| 490 | zone = decoder->zones; |
| 491 | |
| 492 | builder->path_begun = 0; |
| 493 | |
| 494 | zone->base = charstring_base; |
| 495 | limit = zone->limit = charstring_base + charstring_len; |
| 496 | ip = zone->cursor = zone->base; |
| 497 | |
| 498 | error = T1_Err_Ok; |
| 499 | |
| 500 | /* now, execute loop */ |
| 501 | while ( ip < limit ) |
| 502 | { |
| 503 | T1_Int* top = decoder->top; |
| 504 | T1_Operator op = op_none; |
| 505 | T1_Long value = 0; |
| 506 | |
| 507 | /* First of all, decompress operator or value */ |
| 508 | switch (*ip++) |
| 509 | { |
| 510 | case 1: op = op_hstem; break; |
| 511 | |
| 512 | case 3: op = op_vstem; break; |
| 513 | case 4: op = op_vmoveto; break; |
| 514 | case 5: op = op_rlineto; break; |
| 515 | case 6: op = op_hlineto; break; |
| 516 | case 7: op = op_vlineto; break; |
| 517 | case 8: op = op_rrcurveto; break; |
| 518 | case 9: op = op_closepath; break; |
| 519 | case 10: op = op_callsubr; break; |
| 520 | case 11: op = op_return; break; |
| 521 | |
| 522 | case 13: op = op_hsbw; break; |
| 523 | case 14: op = op_endchar; break; |
| 524 | |
| 525 | case 21: op = op_rmoveto; break; |
| 526 | case 22: op = op_hmoveto; break; |
| 527 | |
| 528 | case 30: op = op_vhcurveto; break; |
| 529 | case 31: op = op_hvcurveto; break; |
| 530 | |
| 531 | case 12: |
| 532 | { |
| 533 | if (ip > limit) |
| 534 | { |
| 535 | FT_ERROR(( "T1.Parse_CharStrings : invalid escape (12+EOF)\n" )); |
| 536 | goto Syntax_Error; |
| 537 | } |
| 538 | |
| 539 | switch (*ip++) |
| 540 | { |
| 541 | case 0: op = op_dotsection; break; |
| 542 | case 1: op = op_vstem3; break; |
| 543 | case 2: op = op_hstem3; break; |
| 544 | case 6: op = op_seac; break; |
| 545 | case 7: op = op_sbw; break; |
| 546 | case 12: op = op_div; break; |
| 547 | case 16: op = op_callothersubr; break; |
| 548 | case 17: op = op_pop; break; |
| 549 | case 33: op = op_setcurrentpoint; break; |
| 550 | |
| 551 | default: |
| 552 | FT_ERROR(( "T1.Parse_CharStrings : invalid escape (12+%d)\n", |
| 553 | ip[-1] )); |
| 554 | goto Syntax_Error; |
| 555 | } |
| 556 | } |
| 557 | break; |
| 558 | |
| 559 | case 255: /* four bytes integer */ |
| 560 | { |
| 561 | if (ip+4 > limit) |
| 562 | { |
| 563 | FT_ERROR(( "T1.Parse_CharStrings : unexpected EOF in integer\n" )); |
| 564 | goto Syntax_Error; |
| 565 | } |
| 566 | |
| 567 | value = ((long)ip[0] << 24) | |
| 568 | ((long)ip[1] << 16) | |
| 569 | ((long)ip[2] << 8) | |
| 570 | ip[3]; |
| 571 | ip += 4; |
| 572 | } |
| 573 | break; |
| 574 | |
| 575 | default: |
| 576 | if (ip[-1] >= 32) |
| 577 | { |
| 578 | if (ip[-1] < 247) |
| 579 | value = (long)ip[-1] - 139; |
| 580 | else |
| 581 | { |
| 582 | if (++ip > limit) |
| 583 | { |
| 584 | FT_ERROR(( "T1.Parse_CharStrings : unexpected EOF in integer\n" )); |
| 585 | goto Syntax_Error; |
| 586 | } |
| 587 | |
| 588 | if (ip[-2] < 251) |
| 589 | value = ((long)(ip[-2]-247) << 8) + ip[-1] + 108; |
| 590 | else |
| 591 | value = -((((long)ip[-2]-251) << 8) + ip[-1] + 108 ); |
| 592 | } |
| 593 | } |
| 594 | else |
| 595 | { |
| 596 | FT_ERROR(( "T1.Parse_CharStrings : invalid byte (%d)\n", |
| 597 | ip[-1] )); |
| 598 | goto Syntax_Error; |
| 599 | } |
| 600 | } |
| 601 | |
| 602 | /* push value if needed */ |
| 603 | if ( op == op_none ) |
| 604 | { |
| 605 | if ( top - decoder->stack >= T1_MAX_CHARSTRINGS_OPERANDS ) |
| 606 | { |
| 607 | FT_ERROR(( "T1.Parse_CharStrings : Stack overflow !!\n" )); |
| 608 | goto Syntax_Error; |
| 609 | } |
| 610 | |
| 611 | *top++ = value; |
| 612 | decoder->top = top; |
| 613 | } |
| 614 | |
| 615 | else if ( op == op_callothersubr ) /* check arguments differently */ |
| 616 | { |
| 617 | if ( top - decoder->stack < 2) |
| 618 | goto Stack_Underflow; |
| 619 | |
| 620 | top -= 2; |
| 621 | |
| 622 | switch (top[1]) |
| 623 | { |
| 624 | case 1: /* start flex feature ----------------------------- */ |
| 625 | { |
| 626 | if (top[0] != 0) goto Unexpected_OtherSubr; |
| 627 | |
| 628 | decoder->flex_state = 1; |
| 629 | decoder->num_flex_vectors = 0; |
| 630 | decoder->flex_vectors[0].x = 0; |
| 631 | decoder->flex_vectors[0].y = 0; |
| 632 | } |
| 633 | break; |
| 634 | |
| 635 | |
| 636 | case 2: /* add flex vector ------------------------------- */ |
| 637 | { |
| 638 | T1_Int index; |
| 639 | T1_Vector* flex; |
| 640 | |
| 641 | if (top[0] != 0) goto Unexpected_OtherSubr; |
| 642 | |
| 643 | top -= 2; |
| 644 | if (top < decoder->stack) goto Stack_Underflow; |
| 645 | |
| 646 | index = decoder->num_flex_vectors++; |
| 647 | if (index >= 7) |
| 648 | { |
| 649 | FT_ERROR(( "T1.Parse_CharStrings: too many flex vectors !\n" )); |
| 650 | goto Syntax_Error; |
| 651 | } |
| 652 | |
| 653 | flex = decoder->flex_vectors + index; |
| 654 | flex->x += top[0]; |
| 655 | flex->y += top[1]; |
| 656 | |
| 657 | } |
| 658 | break; |
| 659 | |
| 660 | |
| 661 | case 0: /* end flex feature ------------------------------ */ |
| 662 | { |
| 663 | if ( decoder->flex_state == 0 || |
| 664 | decoder->num_flex_vectors != 7 ) |
| 665 | { |
| 666 | FT_ERROR(( "T1.Parse_CharStrings: unexpected flex end\n" )); |
| 667 | goto Syntax_Error; |
| 668 | } |
| 669 | |
| 670 | if (top[0] != 3) goto Unexpected_OtherSubr; |
| 671 | |
| 672 | top -= 3; |
| 673 | if (top < decoder->stack) goto Stack_Underflow; |
| 674 | |
| 675 | /* now consume the remaining "pop pop setcurrentpoint" */ |
| 676 | if ( ip+6 > limit || |
| 677 | ip[0] != 12 || ip[1] != 17 || /* pop */ |
| 678 | ip[2] != 12 || ip[3] != 17 || /* pop */ |
| 679 | ip[4] != 12 || ip[5] != 33 ) /* setcurrentpoint */ |
| 680 | { |
| 681 | FT_ERROR(( "T1.Parse_CharStrings: invalid flex charstring\n" )); |
| 682 | goto Syntax_Error; |
| 683 | } |
| 684 | |
| 685 | decoder->flex_state = 0; |
| 686 | decoder->top = top; |
| 687 | |
| 688 | error = t1operator_flex( decoder, top[0], top[1], top[2] ); |
| 689 | } |
| 690 | break; |
| 691 | |
| 692 | |
| 693 | case 3: /* change hints ------------------------------------ */ |
| 694 | { |
| 695 | if (top[0] != 1) goto Unexpected_OtherSubr; |
| 696 | |
| 697 | /* eat the following "pop" */ |
| 698 | if (ip+2 > limit) |
| 699 | { |
| 700 | FT_ERROR(( "T1.Parse_CharStrings: invalid escape (12+%d)\n", |
| 701 | ip[-1] )); |
| 702 | goto Syntax_Error; |
| 703 | } |
| 704 | |
| 705 | if (ip[0] != 12 || ip[1] != 17) |
| 706 | { |
| 707 | FT_ERROR(( "T1.Parse_CharStrings: 'pop' expected, found (%d %d)\n", |
| 708 | ip[0], ip[1] )); |
| 709 | goto Syntax_Error; |
| 710 | } |
| 711 | |
| 712 | ip += 2; |
| 713 | error = hints->change_hints(builder); |
| 714 | } |
| 715 | break; |
| 716 | |
| 717 | |
| 718 | default: |
| 719 | /* invalid OtherSubrs call */ |
| 720 | Unexpected_OtherSubr: |
| 721 | FT_ERROR(( "T1.Parse_CharStrings: unexpected OtherSubrs [%d %d]\n", |
| 722 | top[0], top[1] )); |
| 723 | goto Syntax_Error; |
| 724 | } |
| 725 | decoder->top = top; |
| 726 | } |
| 727 | else |
| 728 | { |
| 729 | T1_Int num_args = args_count[op]; |
| 730 | |
| 731 | if ( top - decoder->stack < num_args ) |
| 732 | goto Stack_Underflow; |
| 733 | |
| 734 | top -= num_args; |
| 735 | |
| 736 | switch (op) |
| 737 | { |
| 738 | case op_endchar: |
| 739 | error = builds->end_char( builder ); |
| 740 | break; |
| 741 | |
| 742 | case op_hsbw: |
| 743 | error = builds->set_bearing_point( builder, top[0], 0, |
| 744 | top[1], 0 ); |
| 745 | break; |
| 746 | |
| 747 | case op_seac: |
| 748 | /* return immediately after the processing */ |
| 749 | return t1operator_seac( decoder, top[0], top[1], |
| 750 | top[2], top[3], top[4] ); |
| 751 | |
| 752 | case op_sbw: |
| 753 | error = builds->set_bearing_point( builder, top[0], top[1], |
| 754 | top[2], top[3] ); |
| 755 | break; |
| 756 | |
| 757 | case op_closepath: |
| 758 | error = builds->close_path( builder ); |
| 759 | break; |
| 760 | |
| 761 | case op_hlineto: |
| 762 | error = builds->rline_to( builder, top[0], 0 ); |
| 763 | break; |
| 764 | |
| 765 | case op_hmoveto: |
| 766 | error = builds->rmove_to( builder, top[0], 0 ); |
| 767 | break; |
| 768 | |
| 769 | case op_hvcurveto: |
| 770 | error = builds->rcurve_to( builder, top[0], 0, |
| 771 | top[1], top[2], |
| 772 | 0, top[3] ); |
| 773 | break; |
| 774 | |
| 775 | case op_rlineto: |
| 776 | error = builds->rline_to( builder, top[0], top[1] ); |
| 777 | break; |
| 778 | |
| 779 | case op_rmoveto: |
| 780 | /* ignore operator when in flex mode */ |
| 781 | if (decoder->flex_state == 0) |
| 782 | error = builds->rmove_to( builder, top[0], top[1] ); |
| 783 | else |
| 784 | top += 2; |
| 785 | break; |
| 786 | |
| 787 | case op_rrcurveto: |
| 788 | { |
| 789 | error = builds->rcurve_to( builder, top[0], top[1], |
| 790 | top[2], top[3], |
| 791 | top[4], top[5] ); |
| 792 | } |
| 793 | break; |
| 794 | |
| 795 | case op_vhcurveto: |
| 796 | error = builds->rcurve_to( builder, 0, top[0], |
| 797 | top[1], top[2], |
| 798 | top[3], 0 ); |
| 799 | break; |
| 800 | |
| 801 | case op_vlineto: |
| 802 | error = builds->rline_to( builder, 0, top[0] ); |
| 803 | break; |
| 804 | |
| 805 | case op_vmoveto: |
| 806 | error = builds->rmove_to( builder, 0, top[0] ); |
| 807 | break; |
| 808 | |
| 809 | case op_dotsection: |
| 810 | error = hints->dot_section( builder ); |
| 811 | break; |
| 812 | |
| 813 | case op_hstem: |
| 814 | error = hints->stem( builder, top[0], top[1], 0 ); |
| 815 | break; |
| 816 | |
| 817 | case op_hstem3: |
| 818 | error = hints->stem3( builder, top[0], top[1], top[2], |
| 819 | top[3], top[4], top[5], 0 ); |
| 820 | break; |
| 821 | |
| 822 | case op_vstem: |
| 823 | error = hints->stem( builder, top[0], top[1], 1 ); |
| 824 | break; |
| 825 | |
| 826 | case op_vstem3: |
| 827 | error = hints->stem3( builder, top[0], top[1], top[2], |
| 828 | top[3], top[4], top[5], 1 ); |
| 829 | break; |
| 830 | |
| 831 | case op_div: |
| 832 | if (top[1]) |
| 833 | *top++ = top[0] / top[1]; |
| 834 | else |
| 835 | { |
| 836 | FT_ERROR(( "T1.Parse_CHarStrings : division by 0\n" )); |
| 837 | goto Syntax_Error; |
| 838 | } |
| 839 | break; |
| 840 | |
| 841 | case op_callsubr: |
| 842 | { |
| 843 | T1_Int index = top[0]; |
| 844 | |
| 845 | if ( index < 0 || index >= num_subrs ) |
| 846 | { |
| 847 | FT_ERROR(( "T1.Parse_CharStrings : invalid subrs index\n" )); |
| 848 | goto Syntax_Error; |
| 849 | } |
| 850 | |
| 851 | if ( zone - decoder->zones >= T1_MAX_SUBRS_CALLS ) |
| 852 | { |
| 853 | FT_ERROR(( "T1.Parse_CharStrings : too many nested subrs\n" )); |
| 854 | goto Syntax_Error; |
| 855 | } |
| 856 | |
| 857 | zone->cursor = ip; /* save current instruction pointer */ |
| 858 | |
| 859 | zone++; |
| 860 | zone->base = subrs_base[index]; |
| 861 | zone->limit = zone->base + subrs_len[index]; |
| 862 | zone->cursor = zone->base; |
| 863 | |
| 864 | if (!zone->base) |
| 865 | { |
| 866 | FT_ERROR(( "T1.Parse_CharStrings : invoking empty subrs !!\n" )); |
| 867 | goto Syntax_Error; |
| 868 | } |
| 869 | |
| 870 | decoder->zone = zone; |
| 871 | ip = zone->base; |
| 872 | limit = zone->limit; |
| 873 | } |
| 874 | break; |
| 875 | |
| 876 | case op_pop: |
| 877 | FT_ERROR(( "T1.Parse_CharStrings : unexpected POP\n" )); |
| 878 | goto Syntax_Error; |
| 879 | |
| 880 | |
| 881 | case op_return: |
| 882 | if ( zone <= decoder->zones ) |
| 883 | { |
| 884 | FT_ERROR(( "T1.Parse_CharStrings : unexpected return\n" )); |
| 885 | goto Syntax_Error; |
| 886 | } |
| 887 | |
| 888 | zone--; |
| 889 | ip = zone->cursor; |
| 890 | limit = zone->limit; |
| 891 | decoder->zone = zone; |
| 892 | break; |
| 893 | |
| 894 | case op_setcurrentpoint: |
| 895 | FT_ERROR(( "T1.Parse_CharStrings : unexpected SETCURRENTPOINT\n" )); |
| 896 | goto Syntax_Error; |
| 897 | break; |
| 898 | |
| 899 | default: |
| 900 | FT_ERROR(( "T1.Parse_CharStrings : unhandled opcode %d\n", op )); |
| 901 | goto Syntax_Error; |
| 902 | } |
| 903 | |
| 904 | decoder->top = top; |
| 905 | } |
| 906 | } |
| 907 | |
| 908 | return error; |
| 909 | |
| 910 | Syntax_Error: |
| 911 | return T1_Err_Syntax_Error; |
| 912 | |
| 913 | Stack_Underflow: |
| 914 | return T1_Err_Stack_Underflow; |
| 915 | } |
| 916 | |
| 917 | |
| 918 | |
| 919 | /*************************************************************************/ |
| 920 | /* */ |
| 921 | /* <Function> T1_Add_Points */ |
| 922 | /* */ |
| 923 | /* <Description> */ |
| 924 | /* Checks that there is enough room in the current load glyph outline */ |
| 925 | /* to accept "num_points" additional outline points. If not, this */ |
| 926 | /* function grows the load outline's arrays accordingly.. */ |
| 927 | /* */ |
| 928 | /* <Input> */ |
| 929 | /* builder :: pointer to glyph builder object */ |
| 930 | /* num_points :: number of points that will be added later */ |
| 931 | /* */ |
| 932 | /* <Return> */ |
| 933 | /* Type1 error code. 0 means success */ |
| 934 | /* */ |
| 935 | /* <Note> */ |
| 936 | /* This function does NOT update the points count in the glyph builder*/ |
| 937 | /* This must be done by the caller itself, after this function is */ |
| 938 | /* invoked.. */ |
| 939 | /* */ |
| 940 | LOCAL_FUNC |
| 941 | T1_Error T1_Add_Points( T1_Builder* builder, |
| 942 | T1_Int num_points ) |
| 943 | { |
| 944 | T1_Int new_points; |
| 945 | |
| 946 | new_points = builder->base.n_points + |
| 947 | builder->current.n_points + |
| 948 | num_points; |
| 949 | |
| 950 | if ( new_points > builder->max_points ) |
| 951 | { |
| 952 | FT_Memory memory = builder->memory; |
| 953 | T1_Error error; |
| 954 | T1_Int increment = builder->current.points - builder->base.points; |
| 955 | T1_Int current = builder->max_points; |
| 956 | |
| 957 | while ( builder->max_points < new_points ) |
| 958 | builder->max_points += 16; |
| 959 | |
| 960 | if ( REALLOC_ARRAY( builder->base.points, |
| 961 | current, builder->max_points, T1_Vector ) || |
| 962 | |
David Turner | 41dbcbf | 2000-03-09 11:46:25 +0000 | [diff] [blame] | 963 | REALLOC_ARRAY( builder->base.tags, |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 964 | current, builder->max_points, T1_Byte ) ) |
| 965 | return error; |
| 966 | |
| 967 | builder->current.points = builder->base.points + increment; |
David Turner | 41dbcbf | 2000-03-09 11:46:25 +0000 | [diff] [blame] | 968 | builder->current.tags = builder->base.tags + increment; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 969 | } |
| 970 | |
| 971 | return T1_Err_Ok; |
| 972 | } |
| 973 | |
| 974 | /*************************************************************************/ |
| 975 | /* */ |
| 976 | /* <Function> T1_Add_Contours */ |
| 977 | /* */ |
| 978 | /* <Description> */ |
| 979 | /* Checks that there is enough room in the current load glyph outline */ |
| 980 | /* to accept "num_contours" additional contours. If not, this func */ |
| 981 | /* the load outline's arrays accordingly.. */ |
| 982 | /* */ |
| 983 | /* <Input> */ |
| 984 | /* builder :: pointer to glyph builder object */ |
| 985 | /* num_contours :: number of contours that will be added later */ |
| 986 | /* */ |
| 987 | /* <Return> */ |
| 988 | /* Type1 error code. 0 means success */ |
| 989 | /* */ |
| 990 | /* <Note> */ |
| 991 | /* This function does NOT update the contours count in the load glyph */ |
| 992 | /* This must be done by the caller itself, after this function is */ |
| 993 | /* invoked.. */ |
| 994 | /* */ |
| 995 | LOCAL_FUNC |
| 996 | T1_Error T1_Add_Contours( T1_Builder* builder, |
| 997 | T1_Int num_contours ) |
| 998 | { |
| 999 | T1_Int new_contours; |
| 1000 | |
| 1001 | new_contours = builder->base.n_contours + |
| 1002 | builder->current.n_contours + |
| 1003 | num_contours; |
| 1004 | |
| 1005 | if ( new_contours > builder->max_contours && builder->load_points ) |
| 1006 | { |
| 1007 | T1_Error error; |
| 1008 | FT_Memory memory = builder->memory; |
| 1009 | T1_Int increment = builder->current.contours - builder->base.contours; |
| 1010 | T1_Int current = builder->max_contours; |
| 1011 | |
| 1012 | while ( builder->max_contours < new_contours ) |
| 1013 | builder->max_contours += 4; |
| 1014 | |
| 1015 | if ( REALLOC_ARRAY( builder->base.contours, |
| 1016 | current, builder->max_contours, T1_Short ) ) |
| 1017 | return error; |
| 1018 | |
| 1019 | builder->current.contours = builder->base.contours + increment; |
| 1020 | } |
| 1021 | |
| 1022 | return T1_Err_Ok; |
| 1023 | } |
| 1024 | |
| 1025 | |
| 1026 | /**********************************************************************/ |
| 1027 | /**********************************************************************/ |
| 1028 | /**********************************************************************/ |
| 1029 | /********** *********/ |
| 1030 | /********** *********/ |
| 1031 | /********** COMPUTE THE MAXIMUM ADVANCE WIDTH *********/ |
| 1032 | /********** *********/ |
| 1033 | /********** The following code is in charge of computing *********/ |
| 1034 | /********** the maximum advance width of the font. It *********/ |
| 1035 | /********** quickly process each glyph charstring to *********/ |
| 1036 | /********** extract the value from either a "sbw" or "seac" *********/ |
| 1037 | /********** operator. *********/ |
| 1038 | /********** *********/ |
| 1039 | /**********************************************************************/ |
| 1040 | /**********************************************************************/ |
| 1041 | /**********************************************************************/ |
| 1042 | |
| 1043 | |
| 1044 | |
| 1045 | static |
| 1046 | T1_Error maxadv_sbw( T1_Decoder* decoder, |
| 1047 | T1_Pos sbx, |
| 1048 | T1_Pos sby, |
| 1049 | T1_Pos wx, |
| 1050 | T1_Pos wy ) |
| 1051 | { |
| 1052 | if (wx > decoder->builder.advance.x) |
| 1053 | decoder->builder.advance.x = wx; |
| 1054 | |
| 1055 | (void)sbx; |
| 1056 | (void)sby; |
| 1057 | (void)wy; |
| 1058 | return -1; /* return an error code to exit the Type 1 parser */ |
| 1059 | /* immediately. */ |
| 1060 | } |
| 1061 | |
| 1062 | |
| 1063 | static |
| 1064 | T1_Int maxadv_error( void ) |
| 1065 | { |
| 1066 | /* we should never reach this code, unless with a buggy font */ |
| 1067 | return -2; |
| 1068 | } |
| 1069 | |
| 1070 | /* the maxadv_gbuilder_interface is used when computing the maximum */ |
| 1071 | /* advance width of all glyphs in a given font. We only process the */ |
| 1072 | /* 'sbw' operator here, and return an error for all others.. */ |
| 1073 | |
| 1074 | /* Note that "seac" is processed by the T1_Decoder */ |
| 1075 | static |
| 1076 | const T1_Builder_Funcs maxadv_builder_interface = |
| 1077 | { |
| 1078 | (T1_Builder_EndChar) maxadv_error, |
| 1079 | (T1_Builder_Sbw) maxadv_sbw, |
| 1080 | (T1_Builder_ClosePath) maxadv_error, |
| 1081 | (T1_Builder_RLineTo) maxadv_error, |
| 1082 | (T1_Builder_RMoveTo) maxadv_error, |
| 1083 | (T1_Builder_RCurveTo) maxadv_error |
| 1084 | }; |
| 1085 | |
| 1086 | |
| 1087 | /* the maxadv_interface is used when computing the maximum advance */ |
| 1088 | /* with of the set of glyphs in a given font file. We only process */ |
| 1089 | /* the "seac" operator and return immediately.. */ |
| 1090 | static |
| 1091 | const T1_Hinter_Funcs maxadv_hinter_interface = |
| 1092 | { |
| 1093 | (T1_Hinter_DotSection) maxadv_error, |
| 1094 | (T1_Hinter_ChangeHints) maxadv_error, |
| 1095 | (T1_Hinter_Stem) maxadv_error, |
| 1096 | (T1_Hinter_Stem3) maxadv_error, |
| 1097 | }; |
| 1098 | |
| 1099 | |
| 1100 | |
| 1101 | LOCAL_FUNC |
| 1102 | T1_Error T1_Compute_Max_Advance( T1_Face face, |
| 1103 | T1_Int *max_advance ) |
| 1104 | { |
| 1105 | T1_Error error; |
| 1106 | T1_Decoder decoder; |
| 1107 | T1_Int glyph_index; |
David Turner | 76bbd57 | 2000-01-27 13:35:16 +0000 | [diff] [blame] | 1108 | T1_Font* type1 = &face->type1; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1109 | |
| 1110 | *max_advance = 0; |
| 1111 | |
| 1112 | /* Initialise load decoder */ |
| 1113 | T1_Init_Decoder( &decoder, &maxadv_hinter_interface ); |
| 1114 | |
| 1115 | T1_Init_Builder( &decoder.builder, face, 0, 0, |
| 1116 | &maxadv_builder_interface ); |
| 1117 | |
| 1118 | /* For each glyph, parse the glyph charstring and extract */ |
| 1119 | /* the advance width.. */ |
David Turner | 76bbd57 | 2000-01-27 13:35:16 +0000 | [diff] [blame] | 1120 | for ( glyph_index = 0; glyph_index < type1->num_glyphs; glyph_index++ ) |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1121 | { |
| 1122 | /* now get load the unscaled outline */ |
| 1123 | error = T1_Parse_CharStrings( &decoder, |
David Turner | 76bbd57 | 2000-01-27 13:35:16 +0000 | [diff] [blame] | 1124 | type1->charstrings [glyph_index], |
| 1125 | type1->charstrings_len[glyph_index], |
| 1126 | type1->num_subrs, |
| 1127 | type1->subrs, |
| 1128 | type1->subrs_len ); |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1129 | /* ignore the error if one occured - skip to next glyph */ |
| 1130 | (void)error; |
| 1131 | } |
| 1132 | |
| 1133 | *max_advance = decoder.builder.advance.x; |
| 1134 | return T1_Err_Ok; |
| 1135 | } |
| 1136 | |
| 1137 | |
| 1138 | /**********************************************************************/ |
| 1139 | /**********************************************************************/ |
| 1140 | /**********************************************************************/ |
| 1141 | /********** *********/ |
| 1142 | /********** *********/ |
| 1143 | /********** UNHINTED GLYPH LOADER *********/ |
| 1144 | /********** *********/ |
| 1145 | /********** The following code is in charge of loading a *********/ |
| 1146 | /********** single outline. It completely ignores hinting *********/ |
| 1147 | /********** and is used when FT_LOAD_NO_HINTING is set. *********/ |
| 1148 | /********** *********/ |
| 1149 | /********** The Type 1 hinter is located in "t1hint.c" *********/ |
| 1150 | /********** *********/ |
| 1151 | /**********************************************************************/ |
| 1152 | /**********************************************************************/ |
| 1153 | /**********************************************************************/ |
| 1154 | |
| 1155 | |
| 1156 | |
| 1157 | static |
| 1158 | T1_Error close_open_path( T1_Builder* builder ) |
| 1159 | { |
| 1160 | T1_Error error; |
| 1161 | FT_Outline* cur = &builder->current; |
| 1162 | T1_Int num_points; |
| 1163 | T1_Int first_point; |
| 1164 | |
| 1165 | /* Some fonts, like Hershey, are made of "open paths" which are */ |
| 1166 | /* now managed directly by FreeType. In this case, it is necessary */ |
| 1167 | /* to close the path by duplicating its points in reverse order, */ |
| 1168 | /* which is precisely the purpose of this function */ |
| 1169 | |
| 1170 | /* first compute the number of points to duplicate.. */ |
| 1171 | if (cur->n_contours > 1) |
| 1172 | first_point = cur->contours[ cur->n_contours-2 ]+1; |
| 1173 | else |
| 1174 | first_point = 0; |
| 1175 | |
| 1176 | num_points = cur->n_points - first_point - 2; |
| 1177 | if ( num_points > 0 ) |
| 1178 | { |
| 1179 | T1_Vector* source_point; |
David Turner | 41dbcbf | 2000-03-09 11:46:25 +0000 | [diff] [blame] | 1180 | char* source_tags; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1181 | T1_Vector* point; |
David Turner | 41dbcbf | 2000-03-09 11:46:25 +0000 | [diff] [blame] | 1182 | char* tags; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1183 | |
| 1184 | error = T1_Add_Points( builder, num_points ); |
| 1185 | if (error) return error; |
| 1186 | |
| 1187 | point = cur->points + cur->n_points; |
David Turner | 41dbcbf | 2000-03-09 11:46:25 +0000 | [diff] [blame] | 1188 | tags = cur->tags + cur->n_points; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1189 | |
| 1190 | source_point = point - 2; |
David Turner | 41dbcbf | 2000-03-09 11:46:25 +0000 | [diff] [blame] | 1191 | source_tags = tags - 2; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1192 | |
| 1193 | cur->n_points += num_points; |
| 1194 | |
| 1195 | if ( builder->load_points ) |
| 1196 | do |
| 1197 | { |
| 1198 | *point++ = *source_point--; |
David Turner | 41dbcbf | 2000-03-09 11:46:25 +0000 | [diff] [blame] | 1199 | *tags++ = *source_tags--; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1200 | num_points--; |
| 1201 | } |
| 1202 | while (num_points > 0); |
| 1203 | } |
| 1204 | |
| 1205 | builder->path_begun = 0; |
| 1206 | return T1_Err_Ok; |
| 1207 | } |
| 1208 | |
| 1209 | |
| 1210 | static |
| 1211 | T1_Error gload_closepath( T1_Builder* builder ) |
| 1212 | { |
| 1213 | FT_Outline* cur = &builder->current; |
| 1214 | |
| 1215 | /* save current contour, if any */ |
| 1216 | if ( cur->n_contours > 0 ) |
| 1217 | cur->contours[cur->n_contours-1] = cur->n_points-1; |
| 1218 | |
| 1219 | #ifndef T1_CONFIG_OPTION_DISABLE_HINTER |
| 1220 | /* hint latest points if needed - this is not strictly required */ |
| 1221 | /* there, but it helps for debugging, and doesn't affect performance */ |
| 1222 | if ( builder->pass == 1 ) |
| 1223 | T1_Hint_Points( builder ); |
| 1224 | #endif |
| 1225 | |
| 1226 | builder->path_begun = 0; |
| 1227 | return T1_Err_Ok; |
| 1228 | } |
| 1229 | |
| 1230 | |
| 1231 | |
| 1232 | static |
| 1233 | T1_Error gload_endchar( T1_Builder* builder ) |
| 1234 | { |
| 1235 | FT_Outline* cur = &builder->current; |
| 1236 | T1_Error error; |
| 1237 | |
| 1238 | /* close path if needed */ |
| 1239 | if (builder->path_begun) |
| 1240 | { |
| 1241 | error = close_open_path( builder ); |
| 1242 | if (error) return error; |
| 1243 | } |
| 1244 | |
| 1245 | error = gload_closepath( builder ); |
| 1246 | |
| 1247 | builder->base.n_points += cur->n_points; |
| 1248 | builder->base.n_contours += cur->n_contours; |
| 1249 | |
| 1250 | return error; |
| 1251 | } |
| 1252 | |
| 1253 | |
| 1254 | |
| 1255 | static |
| 1256 | T1_Error gload_sbw( T1_Builder* builder, |
| 1257 | T1_Pos sbx, |
| 1258 | T1_Pos sby, |
| 1259 | T1_Pos wx, |
| 1260 | T1_Pos wy ) |
| 1261 | { |
| 1262 | builder->left_bearing.x += sbx; |
| 1263 | builder->left_bearing.y += sby; |
| 1264 | builder->advance.x = wx; |
| 1265 | builder->advance.y = wy; |
| 1266 | |
| 1267 | builder->last.x = sbx; |
| 1268 | builder->last.y = sby; |
| 1269 | return 0; |
| 1270 | } |
| 1271 | |
| 1272 | |
| 1273 | |
| 1274 | |
| 1275 | static |
| 1276 | T1_Error gload_rlineto( T1_Builder* builder, |
| 1277 | T1_Pos dx, |
| 1278 | T1_Pos dy ) |
| 1279 | { |
| 1280 | T1_Error error; |
| 1281 | FT_Outline* cur = &builder->current; |
| 1282 | T1_Vector vec; |
| 1283 | |
| 1284 | /* grow buffer if necessary */ |
| 1285 | error = T1_Add_Points ( builder, 1 ); |
| 1286 | if (error) return error; |
| 1287 | |
| 1288 | if ( builder->load_points ) |
| 1289 | { |
| 1290 | /* save point */ |
| 1291 | vec.x = builder->last.x + dx; |
| 1292 | vec.y = builder->last.y + dy; |
| 1293 | |
| 1294 | cur->points[cur->n_points] = vec; |
David Turner | 41dbcbf | 2000-03-09 11:46:25 +0000 | [diff] [blame] | 1295 | cur->tags [cur->n_points] = FT_Curve_Tag_On; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1296 | |
| 1297 | builder->last = vec; |
| 1298 | } |
| 1299 | cur->n_points++; |
| 1300 | |
| 1301 | builder->path_begun = 1; |
| 1302 | return T1_Err_Ok; |
| 1303 | } |
| 1304 | |
| 1305 | |
| 1306 | static |
| 1307 | T1_Error gload_rmoveto( T1_Builder* builder, |
| 1308 | T1_Pos dx, |
| 1309 | T1_Pos dy ) |
| 1310 | { |
| 1311 | T1_Error error; |
| 1312 | FT_Outline* cur = &builder->current; |
| 1313 | T1_Vector vec; |
| 1314 | |
| 1315 | /* in the case where "path_begun" is set, we have a rmoveto */ |
| 1316 | /* after some normal path definition. When the face's paint */ |
| 1317 | /* type is set to 1, this means that we have an "open path", */ |
| 1318 | /* also called a 'stroke'. The FreeType raster doesn't support */ |
| 1319 | /* opened path, so we'll close it explicitely there.. */ |
David Turner | 76bbd57 | 2000-01-27 13:35:16 +0000 | [diff] [blame] | 1320 | if ( builder->path_begun && builder->face->type1.paint_type == 1 ) |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1321 | { |
David Turner | 76bbd57 | 2000-01-27 13:35:16 +0000 | [diff] [blame] | 1322 | if ( builder->face->type1.paint_type == 1 ) |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1323 | { |
| 1324 | error = close_open_path( builder ); |
| 1325 | if (error) return error; |
| 1326 | } |
| 1327 | } |
| 1328 | |
| 1329 | /* grow buffer if necessary */ |
| 1330 | error = T1_Add_Contours( builder, 1 ) || |
| 1331 | T1_Add_Points ( builder, 1 ); |
| 1332 | if (error) return error; |
| 1333 | |
| 1334 | /* save current contour, if any */ |
| 1335 | if ( cur->n_contours > 0 ) |
| 1336 | cur->contours[cur->n_contours-1] = cur->n_points-1; |
| 1337 | |
| 1338 | if ( builder->load_points ) |
| 1339 | { |
| 1340 | /* save point */ |
| 1341 | vec.x = builder->last.x + dx; |
| 1342 | vec.y = builder->last.y + dy; |
| 1343 | cur->points[cur->n_points] = vec; |
David Turner | 41dbcbf | 2000-03-09 11:46:25 +0000 | [diff] [blame] | 1344 | cur->tags [cur->n_points] = FT_Curve_Tag_On; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1345 | |
| 1346 | builder->last = vec; |
| 1347 | } |
| 1348 | |
| 1349 | cur->n_contours++; |
| 1350 | cur->n_points++; |
| 1351 | |
| 1352 | return T1_Err_Ok; |
| 1353 | } |
| 1354 | |
| 1355 | |
| 1356 | static |
| 1357 | T1_Error gload_rrcurveto( T1_Builder* builder, |
| 1358 | T1_Pos dx1, |
| 1359 | T1_Pos dy1, |
| 1360 | T1_Pos dx2, |
| 1361 | T1_Pos dy2, |
| 1362 | T1_Pos dx3, |
| 1363 | T1_Pos dy3 ) |
| 1364 | { |
| 1365 | T1_Error error; |
| 1366 | FT_Outline* cur = &builder->current; |
| 1367 | T1_Vector vec; |
| 1368 | T1_Vector* points; |
David Turner | 41dbcbf | 2000-03-09 11:46:25 +0000 | [diff] [blame] | 1369 | char* tags; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1370 | |
| 1371 | /* grow buffer if necessary */ |
| 1372 | error = T1_Add_Points ( builder, 3 ); |
| 1373 | if (error) return error; |
| 1374 | |
| 1375 | if ( builder->load_points ) |
| 1376 | { |
| 1377 | /* save point */ |
| 1378 | points = cur->points + cur->n_points; |
David Turner | 41dbcbf | 2000-03-09 11:46:25 +0000 | [diff] [blame] | 1379 | tags = cur->tags + cur->n_points; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1380 | |
| 1381 | vec.x = builder->last.x + dx1; |
| 1382 | vec.y = builder->last.y + dy1; |
David Turner | 41dbcbf | 2000-03-09 11:46:25 +0000 | [diff] [blame] | 1383 | points[0] = vec; tags[0] = FT_Curve_Tag_Cubic; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1384 | |
| 1385 | vec.x += dx2; |
| 1386 | vec.y += dy2; |
David Turner | 41dbcbf | 2000-03-09 11:46:25 +0000 | [diff] [blame] | 1387 | points[1] = vec; tags[1] = FT_Curve_Tag_Cubic; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1388 | |
| 1389 | vec.x += dx3; |
| 1390 | vec.y += dy3; |
David Turner | 41dbcbf | 2000-03-09 11:46:25 +0000 | [diff] [blame] | 1391 | points[2] = vec; tags[2] = FT_Curve_Tag_On; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1392 | |
| 1393 | builder->last = vec; |
| 1394 | } |
| 1395 | |
| 1396 | cur->n_points += 3; |
| 1397 | builder->path_begun = 1; |
| 1398 | return T1_Err_Ok; |
| 1399 | } |
| 1400 | |
| 1401 | |
| 1402 | |
| 1403 | |
| 1404 | static |
| 1405 | T1_Error gload_ignore( void ) |
| 1406 | { |
| 1407 | return 0; |
| 1408 | } |
| 1409 | |
| 1410 | |
| 1411 | static |
| 1412 | const T1_Builder_Funcs gload_builder_interface = |
| 1413 | { |
| 1414 | gload_endchar, |
| 1415 | gload_sbw, |
| 1416 | gload_closepath, |
| 1417 | gload_rlineto, |
| 1418 | gload_rmoveto, |
| 1419 | gload_rrcurveto |
| 1420 | }; |
| 1421 | |
| 1422 | |
| 1423 | static |
| 1424 | const T1_Builder_Funcs gload_builder_interface_null = |
| 1425 | { |
| 1426 | (T1_Builder_EndChar) gload_ignore, |
| 1427 | (T1_Builder_Sbw) gload_sbw, /* record left bearing */ |
| 1428 | (T1_Builder_ClosePath) gload_ignore, |
| 1429 | (T1_Builder_RLineTo) gload_ignore, |
| 1430 | (T1_Builder_RMoveTo) gload_ignore, |
| 1431 | (T1_Builder_RCurveTo) gload_ignore |
| 1432 | }; |
| 1433 | |
| 1434 | |
| 1435 | static |
| 1436 | const T1_Hinter_Funcs gload_hinter_interface = |
| 1437 | { |
| 1438 | (T1_Hinter_DotSection) gload_ignore, /* dotsection */ |
| 1439 | (T1_Hinter_ChangeHints) gload_ignore, /* changehints */ |
| 1440 | (T1_Hinter_Stem) gload_ignore, /* hstem & vstem */ |
| 1441 | (T1_Hinter_Stem3) gload_ignore, /* hstem3 & vestem3 */ |
| 1442 | }; |
| 1443 | |
| 1444 | |
| 1445 | |
| 1446 | |
| 1447 | LOCAL_FUNC |
| 1448 | T1_Error T1_Load_Glyph( T1_GlyphSlot glyph, |
| 1449 | T1_Size size, |
| 1450 | T1_Int glyph_index, |
| 1451 | T1_Int load_flags ) |
| 1452 | { |
| 1453 | T1_Error error; |
| 1454 | T1_Decoder decoder; |
| 1455 | T1_Face face = (T1_Face)glyph->root.face; |
| 1456 | T1_Bool hinting; |
David Turner | 76bbd57 | 2000-01-27 13:35:16 +0000 | [diff] [blame] | 1457 | T1_Font* type1 = &face->type1; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1458 | |
David Turner | ed7f62a | 2000-03-28 11:19:28 +0000 | [diff] [blame] | 1459 | if (load_flags & FT_LOAD_NO_RECURSE) |
| 1460 | load_flags |= FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING; |
| 1461 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1462 | glyph->x_scale = size->root.metrics.x_scale; |
| 1463 | glyph->y_scale = size->root.metrics.y_scale; |
| 1464 | |
| 1465 | glyph->root.outline.n_points = 0; |
| 1466 | glyph->root.outline.n_contours = 0; |
| 1467 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1468 | glyph->root.format = ft_glyph_format_none; |
| 1469 | |
David Turner | 1ab77fd | 2000-02-10 18:08:17 +0000 | [diff] [blame] | 1470 | hinting = 0; |
| 1471 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1472 | #ifndef T1_CONFIG_OPTION_DISABLE_HINTER |
| 1473 | /*****************************************************************/ |
| 1474 | /* */ |
| 1475 | /* Hinter overview : */ |
| 1476 | /* */ |
| 1477 | /* This is a two-pass hinter. On the first pass, the hints */ |
| 1478 | /* are all recorded by the hinter, and no point is loaded */ |
| 1479 | /* in the outline. */ |
| 1480 | /* */ |
| 1481 | /* When the first pass is finished, all stems hints are */ |
| 1482 | /* grid-fitted at once. */ |
| 1483 | /* */ |
| 1484 | /* Then, a second pass is performed to load the outline */ |
| 1485 | /* points as well as hint/scale them correctly. */ |
| 1486 | /* */ |
| 1487 | |
David Turner | 1ab77fd | 2000-02-10 18:08:17 +0000 | [diff] [blame] | 1488 | hinting = (load_flags & (FT_LOAD_NO_SCALE|FT_LOAD_NO_HINTING)) == 0; |
| 1489 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1490 | if ( hinting ) |
| 1491 | { |
| 1492 | /* Pass 1 - don't record points, simply stem hints */ |
| 1493 | T1_Init_Decoder( &decoder, &t1_hinter_funcs ); |
| 1494 | T1_Init_Builder( &decoder.builder, face, size, glyph, |
| 1495 | &gload_builder_interface_null ); |
| 1496 | |
| 1497 | glyph->hints->hori_stems.num_stems = 0; |
| 1498 | glyph->hints->vert_stems.num_stems = 0; |
| 1499 | |
| 1500 | error = T1_Parse_CharStrings( &decoder, |
David Turner | 76bbd57 | 2000-01-27 13:35:16 +0000 | [diff] [blame] | 1501 | type1->charstrings [glyph_index], |
| 1502 | type1->charstrings_len[glyph_index], |
| 1503 | type1->num_subrs, |
| 1504 | type1->subrs, |
| 1505 | type1->subrs_len ); |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1506 | |
| 1507 | /* All right, pass 1 is finished, now grid-fit all stem hints */ |
| 1508 | T1_Hint_Stems( &decoder.builder ); |
| 1509 | |
| 1510 | /* Pass 2 - record and scale/hint the points */ |
| 1511 | T1_Init_Decoder( &decoder, &t1_hinter_funcs ); |
| 1512 | T1_Init_Builder( &decoder.builder, face, size, glyph, |
| 1513 | &gload_builder_interface ); |
| 1514 | |
| 1515 | decoder.builder.pass = 1; |
David Turner | ed7f62a | 2000-03-28 11:19:28 +0000 | [diff] [blame] | 1516 | decoder.builder.no_recurse = 0; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1517 | |
| 1518 | error = T1_Parse_CharStrings( &decoder, |
David Turner | 76bbd57 | 2000-01-27 13:35:16 +0000 | [diff] [blame] | 1519 | type1->charstrings [glyph_index], |
| 1520 | type1->charstrings_len[glyph_index], |
| 1521 | type1->num_subrs, |
| 1522 | type1->subrs, |
| 1523 | type1->subrs_len ); |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1524 | |
| 1525 | /* save new glyph tables */ |
| 1526 | T1_Done_Builder( &decoder.builder ); |
| 1527 | } |
| 1528 | else |
| 1529 | #endif |
David Turner | ed7f62a | 2000-03-28 11:19:28 +0000 | [diff] [blame] | 1530 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1531 | { |
| 1532 | T1_Init_Decoder( &decoder, &gload_hinter_interface ); |
| 1533 | |
| 1534 | T1_Init_Builder( &decoder.builder, face, size, glyph, |
| 1535 | &gload_builder_interface ); |
| 1536 | |
David Turner | ed7f62a | 2000-03-28 11:19:28 +0000 | [diff] [blame] | 1537 | decoder.builder.no_recurse = !!(load_flags & FT_LOAD_NO_RECURSE); |
| 1538 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1539 | /* now load the unscaled outline */ |
| 1540 | error = T1_Parse_CharStrings( &decoder, |
David Turner | 76bbd57 | 2000-01-27 13:35:16 +0000 | [diff] [blame] | 1541 | type1->charstrings [glyph_index], |
| 1542 | type1->charstrings_len[glyph_index], |
| 1543 | type1->num_subrs, |
| 1544 | type1->subrs, |
| 1545 | type1->subrs_len ); |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1546 | |
| 1547 | /* save new glyph tables */ |
| 1548 | T1_Done_Builder( &decoder.builder ); |
| 1549 | } |
| 1550 | |
| 1551 | |
| 1552 | /* Now, set the metrics.. - this is rather simple, as : */ |
| 1553 | /* the left side bearing is the xMin, and the top side */ |
| 1554 | /* bearing the yMax.. */ |
| 1555 | if (!error) |
| 1556 | { |
David Turner | ed7f62a | 2000-03-28 11:19:28 +0000 | [diff] [blame] | 1557 | /* for composite glyphs, return only the left side bearing and the */ |
| 1558 | /* advance width.. */ |
| 1559 | if ( load_flags & FT_LOAD_NO_RECURSE ) |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1560 | { |
David Turner | ed7f62a | 2000-03-28 11:19:28 +0000 | [diff] [blame] | 1561 | glyph->root.metrics.horiBearingX = decoder.builder.left_bearing.x; |
| 1562 | glyph->root.metrics.horiAdvance = decoder.builder.advance.x; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1563 | } |
David Turner | ed7f62a | 2000-03-28 11:19:28 +0000 | [diff] [blame] | 1564 | else |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1565 | { |
David Turner | ed7f62a | 2000-03-28 11:19:28 +0000 | [diff] [blame] | 1566 | FT_BBox cbox; |
| 1567 | FT_Glyph_Metrics* metrics = &glyph->root.metrics; |
| 1568 | |
| 1569 | FT_Outline_Get_CBox( &glyph->root.outline, &cbox ); |
| 1570 | |
| 1571 | /* grid fit the bounding box if necessary */ |
| 1572 | if (hinting) |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1573 | { |
David Turner | ed7f62a | 2000-03-28 11:19:28 +0000 | [diff] [blame] | 1574 | cbox.xMin &= -64; |
| 1575 | cbox.yMin &= -64; |
| 1576 | cbox.xMax = ( cbox.xMax+63 ) & -64; |
| 1577 | cbox.yMax = ( cbox.yMax+63 ) & -64; |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1578 | } |
David Turner | ed7f62a | 2000-03-28 11:19:28 +0000 | [diff] [blame] | 1579 | |
| 1580 | metrics->width = cbox.xMax - cbox.xMin; |
| 1581 | metrics->height = cbox.yMax - cbox.yMin; |
| 1582 | |
| 1583 | metrics->horiBearingX = cbox.xMin; |
| 1584 | metrics->horiBearingY = cbox.yMax; |
| 1585 | |
| 1586 | /* copy the _unscaled_ advance width */ |
| 1587 | metrics->horiAdvance = decoder.builder.advance.x; |
| 1588 | |
| 1589 | /* make up vertical metrics */ |
| 1590 | metrics->vertBearingX = 0; |
| 1591 | metrics->vertBearingY = 0; |
| 1592 | metrics->vertAdvance = 0; |
| 1593 | |
| 1594 | glyph->root.format = ft_glyph_format_outline; |
| 1595 | |
| 1596 | glyph->root.outline.flags &= ft_outline_owner; |
| 1597 | |
| 1598 | if ( size->root.metrics.y_ppem < 24 ) |
| 1599 | glyph->root.outline.flags |= ft_outline_high_precision; |
David Turner | 82942cc | 2000-03-30 08:43:03 +0000 | [diff] [blame] | 1600 | |
| 1601 | glyph->root.outline.flags |= ft_outline_reverse_fill; |
| 1602 | |
David Turner | ed7f62a | 2000-03-28 11:19:28 +0000 | [diff] [blame] | 1603 | /* |
| 1604 | glyph->root.outline.second_pass = TRUE; |
| 1605 | glyph->root.outline.high_precision = ( size->root.metrics.y_ppem < 24 ); |
| 1606 | glyph->root.outline.dropout_mode = 2; |
| 1607 | */ |
| 1608 | |
| 1609 | if ( hinting ) |
| 1610 | { |
| 1611 | /* adjust the advance width */ |
| 1612 | /* XXX : TODO : consider stem hints grid-fit */ |
| 1613 | metrics->horiAdvance = FT_MulFix( metrics->horiAdvance, |
| 1614 | glyph->x_scale ); |
| 1615 | } |
| 1616 | else if ( (load_flags & FT_LOAD_NO_SCALE) == 0 ) |
| 1617 | { |
| 1618 | /* scale the outline and the metrics */ |
| 1619 | T1_Int n; |
| 1620 | FT_Outline* cur = &decoder.builder.base; |
| 1621 | T1_Vector* vec = cur->points; |
| 1622 | T1_Fixed x_scale = glyph->x_scale; |
| 1623 | T1_Fixed y_scale = glyph->y_scale; |
| 1624 | |
| 1625 | /* First of all, scale the points */ |
| 1626 | for ( n = cur->n_points; n > 0; n--, vec++ ) |
| 1627 | { |
| 1628 | vec->x = FT_MulFix( vec->x, x_scale ); |
| 1629 | vec->y = FT_MulFix( vec->y, y_scale ); |
| 1630 | } |
| 1631 | |
| 1632 | /* Then scale the metrics */ |
| 1633 | metrics->width = FT_MulFix( metrics->width, x_scale ); |
| 1634 | metrics->height = FT_MulFix( metrics->height, y_scale ); |
| 1635 | |
| 1636 | metrics->horiBearingX = FT_MulFix( metrics->horiBearingX, x_scale ); |
| 1637 | metrics->horiBearingY = FT_MulFix( metrics->horiBearingY, y_scale ); |
| 1638 | metrics->horiAdvance = FT_MulFix( metrics->horiAdvance, x_scale ); |
| 1639 | |
| 1640 | metrics->vertBearingX = FT_MulFix( metrics->vertBearingX, x_scale ); |
| 1641 | metrics->vertBearingY = FT_MulFix( metrics->vertBearingY, y_scale ); |
| 1642 | metrics->vertAdvance = FT_MulFix( metrics->vertAdvance, x_scale ); |
| 1643 | |
| 1644 | } |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1645 | } |
| 1646 | } |
David Turner | 82942cc | 2000-03-30 08:43:03 +0000 | [diff] [blame] | 1647 | |
David Turner | d2b1f35 | 1999-12-16 23:11:37 +0000 | [diff] [blame] | 1648 | return error; |
| 1649 | } |
| 1650 | |