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| 1 /***************************************************************************/ | |
| 2 /* */ | |
| 3 /* t1gload.c */ | |
| 4 /* */ | |
| 5 /* Type 1 Glyph Loader (body). */ | |
| 6 /* */ | |
| 7 /* Copyright 1996-2006, 2008-2010, 2013 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 | |
| 19 #include "../../include/ft2build.h" | |
| 20 #include "t1gload.h" | |
| 21 #include "../../include/freetype/internal/ftcalc.h" | |
| 22 #include "../../include/freetype/internal/ftdebug.h" | |
| 23 #include "../../include/freetype/internal/ftstream.h" | |
| 24 #include "../../include/freetype/ftoutln.h" | |
| 25 #include "../../include/freetype/internal/psaux.h" | |
| 26 | |
| 27 #include "t1errors.h" | |
| 28 | |
| 29 | |
| 30 /*************************************************************************/ | |
| 31 /* */ | |
| 32 /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ | |
| 33 /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ | |
| 34 /* messages during execution. */ | |
| 35 /* */ | |
| 36 #undef FT_COMPONENT | |
| 37 #define FT_COMPONENT trace_t1gload | |
| 38 | |
| 39 | |
| 40 /*************************************************************************/ | |
| 41 /*************************************************************************/ | |
| 42 /*************************************************************************/ | |
| 43 /********** *********/ | |
| 44 /********** COMPUTE THE MAXIMUM ADVANCE WIDTH *********/ | |
| 45 /********** *********/ | |
| 46 /********** The following code is in charge of computing *********/ | |
| 47 /********** the maximum advance width of the font. It *********/ | |
| 48 /********** quickly processes each glyph charstring to *********/ | |
| 49 /********** extract the value from either a `sbw' or `seac' *********/ | |
| 50 /********** operator. *********/ | |
| 51 /********** *********/ | |
| 52 /*************************************************************************/ | |
| 53 /*************************************************************************/ | |
| 54 /*************************************************************************/ | |
| 55 | |
| 56 | |
| 57 FT_LOCAL_DEF( FT_Error ) | |
| 58 T1_Parse_Glyph_And_Get_Char_String( T1_Decoder decoder, | |
| 59 FT_UInt glyph_index, | |
| 60 FT_Data* char_string ) | |
| 61 { | |
| 62 T1_Face face = (T1_Face)decoder->builder.face; | |
| 63 T1_Font type1 = &face->type1; | |
| 64 FT_Error error = FT_Err_Ok; | |
| 65 | |
| 66 #ifdef FT_CONFIG_OPTION_INCREMENTAL | |
| 67 FT_Incremental_InterfaceRec *inc = | |
| 68 face->root.internal->incremental_interface; | |
| 69 #endif | |
| 70 | |
| 71 | |
| 72 decoder->font_matrix = type1->font_matrix; | |
| 73 decoder->font_offset = type1->font_offset; | |
| 74 | |
| 75 #ifdef FT_CONFIG_OPTION_INCREMENTAL | |
| 76 | |
| 77 /* For incremental fonts get the character data using the */ | |
| 78 /* callback function. */ | |
| 79 if ( inc ) | |
| 80 error = inc->funcs->get_glyph_data( inc->object, | |
| 81 glyph_index, char_string ); | |
| 82 else | |
| 83 | |
| 84 #endif /* FT_CONFIG_OPTION_INCREMENTAL */ | |
| 85 | |
| 86 /* For ordinary fonts get the character data stored in the face record. */ | |
| 87 { | |
| 88 char_string->pointer = type1->charstrings[glyph_index]; | |
| 89 char_string->length = (FT_Int)type1->charstrings_len[glyph_index]; | |
| 90 } | |
| 91 | |
| 92 if ( !error ) | |
| 93 error = decoder->funcs.parse_charstrings( | |
| 94 decoder, (FT_Byte*)char_string->pointer, | |
| 95 char_string->length ); | |
| 96 | |
| 97 #ifdef FT_CONFIG_OPTION_INCREMENTAL | |
| 98 | |
| 99 /* Incremental fonts can optionally override the metrics. */ | |
| 100 if ( !error && inc && inc->funcs->get_glyph_metrics ) | |
| 101 { | |
| 102 FT_Incremental_MetricsRec metrics; | |
| 103 | |
| 104 | |
| 105 metrics.bearing_x = FIXED_TO_INT( decoder->builder.left_bearing.x ); | |
| 106 metrics.bearing_y = 0; | |
| 107 metrics.advance = FIXED_TO_INT( decoder->builder.advance.x ); | |
| 108 metrics.advance_v = FIXED_TO_INT( decoder->builder.advance.y ); | |
| 109 | |
| 110 error = inc->funcs->get_glyph_metrics( inc->object, | |
| 111 glyph_index, FALSE, &metrics ); | |
| 112 | |
| 113 decoder->builder.left_bearing.x = INT_TO_FIXED( metrics.bearing_x ); | |
| 114 decoder->builder.advance.x = INT_TO_FIXED( metrics.advance ); | |
| 115 decoder->builder.advance.y = INT_TO_FIXED( metrics.advance_v ); | |
| 116 } | |
| 117 | |
| 118 #endif /* FT_CONFIG_OPTION_INCREMENTAL */ | |
| 119 | |
| 120 return error; | |
| 121 } | |
| 122 | |
| 123 | |
| 124 FT_CALLBACK_DEF( FT_Error ) | |
| 125 T1_Parse_Glyph( T1_Decoder decoder, | |
| 126 FT_UInt glyph_index ) | |
| 127 { | |
| 128 FT_Data glyph_data; | |
| 129 FT_Error error = T1_Parse_Glyph_And_Get_Char_String( | |
| 130 decoder, glyph_index, &glyph_data ); | |
| 131 | |
| 132 | |
| 133 #ifdef FT_CONFIG_OPTION_INCREMENTAL | |
| 134 | |
| 135 if ( !error ) | |
| 136 { | |
| 137 T1_Face face = (T1_Face)decoder->builder.face; | |
| 138 | |
| 139 | |
| 140 if ( face->root.internal->incremental_interface ) | |
| 141 face->root.internal->incremental_interface->funcs->free_glyph_data( | |
| 142 face->root.internal->incremental_interface->object, | |
| 143 &glyph_data ); | |
| 144 } | |
| 145 | |
| 146 #endif /* FT_CONFIG_OPTION_INCREMENTAL */ | |
| 147 | |
| 148 return error; | |
| 149 } | |
| 150 | |
| 151 | |
| 152 FT_LOCAL_DEF( FT_Error ) | |
| 153 T1_Compute_Max_Advance( T1_Face face, | |
| 154 FT_Pos* max_advance ) | |
| 155 { | |
| 156 FT_Error error; | |
| 157 T1_DecoderRec decoder; | |
| 158 FT_Int glyph_index; | |
| 159 T1_Font type1 = &face->type1; | |
| 160 PSAux_Service psaux = (PSAux_Service)face->psaux; | |
| 161 | |
| 162 | |
| 163 FT_ASSERT( ( face->len_buildchar == 0 ) == ( face->buildchar == NULL ) ); | |
| 164 | |
| 165 *max_advance = 0; | |
| 166 | |
| 167 /* initialize load decoder */ | |
| 168 error = psaux->t1_decoder_funcs->init( &decoder, | |
| 169 (FT_Face)face, | |
| 170 0, /* size */ | |
| 171 0, /* glyph slot */ | |
| 172 (FT_Byte**)type1->glyph_names, | |
| 173 face->blend, | |
| 174 0, | |
| 175 FT_RENDER_MODE_NORMAL, | |
| 176 T1_Parse_Glyph ); | |
| 177 if ( error ) | |
| 178 return error; | |
| 179 | |
| 180 decoder.builder.metrics_only = 1; | |
| 181 decoder.builder.load_points = 0; | |
| 182 | |
| 183 decoder.num_subrs = type1->num_subrs; | |
| 184 decoder.subrs = type1->subrs; | |
| 185 decoder.subrs_len = type1->subrs_len; | |
| 186 | |
| 187 decoder.buildchar = face->buildchar; | |
| 188 decoder.len_buildchar = face->len_buildchar; | |
| 189 | |
| 190 *max_advance = 0; | |
| 191 | |
| 192 /* for each glyph, parse the glyph charstring and extract */ | |
| 193 /* the advance width */ | |
| 194 for ( glyph_index = 0; glyph_index < type1->num_glyphs; glyph_index++ ) | |
| 195 { | |
| 196 /* now get load the unscaled outline */ | |
| 197 error = T1_Parse_Glyph( &decoder, glyph_index ); | |
| 198 if ( glyph_index == 0 || decoder.builder.advance.x > *max_advance ) | |
| 199 *max_advance = decoder.builder.advance.x; | |
| 200 | |
| 201 /* ignore the error if one occurred - skip to next glyph */ | |
| 202 } | |
| 203 | |
| 204 psaux->t1_decoder_funcs->done( &decoder ); | |
| 205 | |
| 206 return FT_Err_Ok; | |
| 207 } | |
| 208 | |
| 209 | |
| 210 FT_LOCAL_DEF( FT_Error ) | |
| 211 T1_Get_Advances( FT_Face t1face, /* T1_Face */ | |
| 212 FT_UInt first, | |
| 213 FT_UInt count, | |
| 214 FT_Int32 load_flags, | |
| 215 FT_Fixed* advances ) | |
| 216 { | |
| 217 T1_Face face = (T1_Face)t1face; | |
| 218 T1_DecoderRec decoder; | |
| 219 T1_Font type1 = &face->type1; | |
| 220 PSAux_Service psaux = (PSAux_Service)face->psaux; | |
| 221 FT_UInt nn; | |
| 222 FT_Error error; | |
| 223 | |
| 224 | |
| 225 if ( load_flags & FT_LOAD_VERTICAL_LAYOUT ) | |
| 226 { | |
| 227 for ( nn = 0; nn < count; nn++ ) | |
| 228 advances[nn] = 0; | |
| 229 | |
| 230 return FT_Err_Ok; | |
| 231 } | |
| 232 | |
| 233 error = psaux->t1_decoder_funcs->init( &decoder, | |
| 234 (FT_Face)face, | |
| 235 0, /* size */ | |
| 236 0, /* glyph slot */ | |
| 237 (FT_Byte**)type1->glyph_names, | |
| 238 face->blend, | |
| 239 0, | |
| 240 FT_RENDER_MODE_NORMAL, | |
| 241 T1_Parse_Glyph ); | |
| 242 if ( error ) | |
| 243 return error; | |
| 244 | |
| 245 decoder.builder.metrics_only = 1; | |
| 246 decoder.builder.load_points = 0; | |
| 247 | |
| 248 decoder.num_subrs = type1->num_subrs; | |
| 249 decoder.subrs = type1->subrs; | |
| 250 decoder.subrs_len = type1->subrs_len; | |
| 251 | |
| 252 decoder.buildchar = face->buildchar; | |
| 253 decoder.len_buildchar = face->len_buildchar; | |
| 254 | |
| 255 for ( nn = 0; nn < count; nn++ ) | |
| 256 { | |
| 257 error = T1_Parse_Glyph( &decoder, first + nn ); | |
| 258 if ( !error ) | |
| 259 advances[nn] = FIXED_TO_INT( decoder.builder.advance.x ); | |
| 260 else | |
| 261 advances[nn] = 0; | |
| 262 } | |
| 263 | |
| 264 return FT_Err_Ok; | |
| 265 } | |
| 266 | |
| 267 | |
| 268 FT_LOCAL_DEF( FT_Error ) | |
| 269 T1_Load_Glyph( FT_GlyphSlot t1glyph, /* T1_GlyphSlot */ | |
| 270 FT_Size t1size, /* T1_Size */ | |
| 271 FT_UInt glyph_index, | |
| 272 FT_Int32 load_flags ) | |
| 273 { | |
| 274 T1_GlyphSlot glyph = (T1_GlyphSlot)t1glyph; | |
| 275 FT_Error error; | |
| 276 T1_DecoderRec decoder; | |
| 277 T1_Face face = (T1_Face)t1glyph->face; | |
| 278 FT_Bool hinting; | |
| 279 T1_Font type1 = &face->type1; | |
| 280 PSAux_Service psaux = (PSAux_Service)face->psaux; | |
| 281 const T1_Decoder_Funcs decoder_funcs = psaux->t1_decoder_funcs; | |
| 282 | |
| 283 FT_Matrix font_matrix; | |
| 284 FT_Vector font_offset = {0, 0}; | |
| 285 FT_Data glyph_data; | |
| 286 FT_Bool must_finish_decoder = FALSE; | |
| 287 #ifdef FT_CONFIG_OPTION_INCREMENTAL | |
| 288 FT_Bool glyph_data_loaded = 0; | |
| 289 #endif | |
| 290 | |
| 291 | |
| 292 #ifdef FT_CONFIG_OPTION_INCREMENTAL | |
| 293 if ( glyph_index >= (FT_UInt)face->root.num_glyphs && | |
| 294 !face->root.internal->incremental_interface ) | |
| 295 #else | |
| 296 if ( glyph_index >= (FT_UInt)face->root.num_glyphs ) | |
| 297 #endif /* FT_CONFIG_OPTION_INCREMENTAL */ | |
| 298 { | |
| 299 error = FT_THROW( Invalid_Argument ); | |
| 300 goto Exit; | |
| 301 } | |
| 302 | |
| 303 FT_ASSERT( ( face->len_buildchar == 0 ) == ( face->buildchar == NULL ) ); | |
| 304 | |
| 305 if ( load_flags & FT_LOAD_NO_RECURSE ) | |
| 306 load_flags |= FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING; | |
| 307 | |
| 308 if ( t1size ) | |
| 309 { | |
| 310 glyph->x_scale = t1size->metrics.x_scale; | |
| 311 glyph->y_scale = t1size->metrics.y_scale; | |
| 312 } | |
| 313 else | |
| 314 { | |
| 315 glyph->x_scale = 0x10000L; | |
| 316 glyph->y_scale = 0x10000L; | |
| 317 } | |
| 318 | |
| 319 t1glyph->outline.n_points = 0; | |
| 320 t1glyph->outline.n_contours = 0; | |
| 321 | |
| 322 hinting = FT_BOOL( ( load_flags & FT_LOAD_NO_SCALE ) == 0 && | |
| 323 ( load_flags & FT_LOAD_NO_HINTING ) == 0 ); | |
| 324 | |
| 325 t1glyph->format = FT_GLYPH_FORMAT_OUTLINE; | |
| 326 | |
| 327 error = decoder_funcs->init( &decoder, | |
| 328 t1glyph->face, | |
| 329 t1size, | |
| 330 t1glyph, | |
| 331 (FT_Byte**)type1->glyph_names, | |
| 332 face->blend, | |
| 333 FT_BOOL( hinting ), | |
| 334 FT_LOAD_TARGET_MODE( load_flags ), | |
| 335 T1_Parse_Glyph ); | |
| 336 if ( error ) | |
| 337 goto Exit; | |
| 338 | |
| 339 must_finish_decoder = TRUE; | |
| 340 | |
| 341 decoder.builder.no_recurse = FT_BOOL( | |
| 342 ( load_flags & FT_LOAD_NO_RECURSE ) != 0 ); | |
| 343 | |
| 344 decoder.num_subrs = type1->num_subrs; | |
| 345 decoder.subrs = type1->subrs; | |
| 346 decoder.subrs_len = type1->subrs_len; | |
| 347 | |
| 348 decoder.buildchar = face->buildchar; | |
| 349 decoder.len_buildchar = face->len_buildchar; | |
| 350 | |
| 351 /* now load the unscaled outline */ | |
| 352 error = T1_Parse_Glyph_And_Get_Char_String( &decoder, glyph_index, | |
| 353 &glyph_data ); | |
| 354 if ( error ) | |
| 355 goto Exit; | |
| 356 #ifdef FT_CONFIG_OPTION_INCREMENTAL | |
| 357 glyph_data_loaded = 1; | |
| 358 #endif | |
| 359 | |
| 360 font_matrix = decoder.font_matrix; | |
| 361 font_offset = decoder.font_offset; | |
| 362 | |
| 363 /* save new glyph tables */ | |
| 364 decoder_funcs->done( &decoder ); | |
| 365 | |
| 366 must_finish_decoder = FALSE; | |
| 367 | |
| 368 /* now, set the metrics -- this is rather simple, as */ | |
| 369 /* the left side bearing is the xMin, and the top side */ | |
| 370 /* bearing the yMax */ | |
| 371 if ( !error ) | |
| 372 { | |
| 373 t1glyph->outline.flags &= FT_OUTLINE_OWNER; | |
| 374 t1glyph->outline.flags |= FT_OUTLINE_REVERSE_FILL; | |
| 375 | |
| 376 /* for composite glyphs, return only left side bearing and */ | |
| 377 /* advance width */ | |
| 378 if ( load_flags & FT_LOAD_NO_RECURSE ) | |
| 379 { | |
| 380 FT_Slot_Internal internal = t1glyph->internal; | |
| 381 | |
| 382 | |
| 383 t1glyph->metrics.horiBearingX = | |
| 384 FIXED_TO_INT( decoder.builder.left_bearing.x ); | |
| 385 t1glyph->metrics.horiAdvance = | |
| 386 FIXED_TO_INT( decoder.builder.advance.x ); | |
| 387 | |
| 388 internal->glyph_matrix = font_matrix; | |
| 389 internal->glyph_delta = font_offset; | |
| 390 internal->glyph_transformed = 1; | |
| 391 } | |
| 392 else | |
| 393 { | |
| 394 FT_BBox cbox; | |
| 395 FT_Glyph_Metrics* metrics = &t1glyph->metrics; | |
| 396 FT_Vector advance; | |
| 397 | |
| 398 | |
| 399 /* copy the _unscaled_ advance width */ | |
| 400 metrics->horiAdvance = | |
| 401 FIXED_TO_INT( decoder.builder.advance.x ); | |
| 402 t1glyph->linearHoriAdvance = | |
| 403 FIXED_TO_INT( decoder.builder.advance.x ); | |
| 404 t1glyph->internal->glyph_transformed = 0; | |
| 405 | |
| 406 if ( load_flags & FT_LOAD_VERTICAL_LAYOUT ) | |
| 407 { | |
| 408 /* make up vertical ones */ | |
| 409 metrics->vertAdvance = ( face->type1.font_bbox.yMax - | |
| 410 face->type1.font_bbox.yMin ) >> 16; | |
| 411 t1glyph->linearVertAdvance = metrics->vertAdvance; | |
| 412 } | |
| 413 else | |
| 414 { | |
| 415 metrics->vertAdvance = | |
| 416 FIXED_TO_INT( decoder.builder.advance.y ); | |
| 417 t1glyph->linearVertAdvance = | |
| 418 FIXED_TO_INT( decoder.builder.advance.y ); | |
| 419 } | |
| 420 | |
| 421 t1glyph->format = FT_GLYPH_FORMAT_OUTLINE; | |
| 422 | |
| 423 if ( t1size && t1size->metrics.y_ppem < 24 ) | |
| 424 t1glyph->outline.flags |= FT_OUTLINE_HIGH_PRECISION; | |
| 425 | |
| 426 #if 1 | |
| 427 /* apply the font matrix, if any */ | |
| 428 if ( font_matrix.xx != 0x10000L || font_matrix.yy != font_matrix.xx || | |
| 429 font_matrix.xy != 0 || font_matrix.yx != 0 ) | |
| 430 FT_Outline_Transform( &t1glyph->outline, &font_matrix ); | |
| 431 | |
| 432 if ( font_offset.x || font_offset.y ) | |
| 433 FT_Outline_Translate( &t1glyph->outline, | |
| 434 font_offset.x, | |
| 435 font_offset.y ); | |
| 436 | |
| 437 advance.x = metrics->horiAdvance; | |
| 438 advance.y = 0; | |
| 439 FT_Vector_Transform( &advance, &font_matrix ); | |
| 440 metrics->horiAdvance = advance.x + font_offset.x; | |
| 441 advance.x = 0; | |
| 442 advance.y = metrics->vertAdvance; | |
| 443 FT_Vector_Transform( &advance, &font_matrix ); | |
| 444 metrics->vertAdvance = advance.y + font_offset.y; | |
| 445 #endif | |
| 446 | |
| 447 if ( ( load_flags & FT_LOAD_NO_SCALE ) == 0 ) | |
| 448 { | |
| 449 /* scale the outline and the metrics */ | |
| 450 FT_Int n; | |
| 451 FT_Outline* cur = decoder.builder.base; | |
| 452 FT_Vector* vec = cur->points; | |
| 453 FT_Fixed x_scale = glyph->x_scale; | |
| 454 FT_Fixed y_scale = glyph->y_scale; | |
| 455 | |
| 456 | |
| 457 /* First of all, scale the points, if we are not hinting */ | |
| 458 if ( !hinting || ! decoder.builder.hints_funcs ) | |
| 459 for ( n = cur->n_points; n > 0; n--, vec++ ) | |
| 460 { | |
| 461 vec->x = FT_MulFix( vec->x, x_scale ); | |
| 462 vec->y = FT_MulFix( vec->y, y_scale ); | |
| 463 } | |
| 464 | |
| 465 /* Then scale the metrics */ | |
| 466 metrics->horiAdvance = FT_MulFix( metrics->horiAdvance, x_scale ); | |
| 467 metrics->vertAdvance = FT_MulFix( metrics->vertAdvance, y_scale ); | |
| 468 } | |
| 469 | |
| 470 /* compute the other metrics */ | |
| 471 FT_Outline_Get_CBox( &t1glyph->outline, &cbox ); | |
| 472 | |
| 473 metrics->width = cbox.xMax - cbox.xMin; | |
| 474 metrics->height = cbox.yMax - cbox.yMin; | |
| 475 | |
| 476 metrics->horiBearingX = cbox.xMin; | |
| 477 metrics->horiBearingY = cbox.yMax; | |
| 478 | |
| 479 if ( load_flags & FT_LOAD_VERTICAL_LAYOUT ) | |
| 480 { | |
| 481 /* make up vertical ones */ | |
| 482 ft_synthesize_vertical_metrics( metrics, | |
| 483 metrics->vertAdvance ); | |
| 484 } | |
| 485 } | |
| 486 | |
| 487 /* Set control data to the glyph charstrings. Note that this is */ | |
| 488 /* _not_ zero-terminated. */ | |
| 489 t1glyph->control_data = (FT_Byte*)glyph_data.pointer; | |
| 490 t1glyph->control_len = glyph_data.length; | |
| 491 } | |
| 492 | |
| 493 | |
| 494 Exit: | |
| 495 | |
| 496 #ifdef FT_CONFIG_OPTION_INCREMENTAL | |
| 497 if ( glyph_data_loaded && face->root.internal->incremental_interface ) | |
| 498 { | |
| 499 face->root.internal->incremental_interface->funcs->free_glyph_data( | |
| 500 face->root.internal->incremental_interface->object, | |
| 501 &glyph_data ); | |
| 502 | |
| 503 /* Set the control data to null - it is no longer available if */ | |
| 504 /* loaded incrementally. */ | |
| 505 t1glyph->control_data = 0; | |
| 506 t1glyph->control_len = 0; | |
| 507 } | |
| 508 #endif | |
| 509 | |
| 510 if ( must_finish_decoder ) | |
| 511 decoder_funcs->done( &decoder ); | |
| 512 | |
| 513 return error; | |
| 514 } | |
| 515 | |
| 516 | |
| 517 /* END */ | |
| OLD | NEW |
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Chromium Code Reviews
Issue 815103002:
Update freetype to 2.5.4. (Closed)
Base URL: https://pdfium.googlesource.com/pdfium.git@master