1 /***************************************************************************/ 2 /* */ 3 /* t1gload.c */ 4 /* */ 5 /* Type 1 Glyph Loader (body). */ 6 /* */ 7 /* Copyright 1996-2015 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 <ft2build.h> 20 #include "t1gload.h" 21 #include FT_INTERNAL_CALC_H 22 #include FT_INTERNAL_DEBUG_H 23 #include FT_INTERNAL_STREAM_H 24 #include FT_OUTLINE_H 25 #include FT_INTERNAL_POSTSCRIPT_AUX_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 static 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 (FT_UInt)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 (void)T1_Parse_Glyph( &decoder, (FT_UInt)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; 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_TRACE1(( "T1_Load_Glyph: glyph index %d\n", glyph_index )); 304 305 FT_ASSERT( ( face->len_buildchar == 0 ) == ( face->buildchar == NULL ) ); 306 307 if ( load_flags & FT_LOAD_NO_RECURSE ) 308 load_flags |= FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING; 309 310 if ( t1size ) 311 { 312 glyph->x_scale = t1size->metrics.x_scale; 313 glyph->y_scale = t1size->metrics.y_scale; 314 } 315 else 316 { 317 glyph->x_scale = 0x10000L; 318 glyph->y_scale = 0x10000L; 319 } 320 321 t1glyph->outline.n_points = 0; 322 t1glyph->outline.n_contours = 0; 323 324 hinting = FT_BOOL( ( load_flags & FT_LOAD_NO_SCALE ) == 0 && 325 ( load_flags & FT_LOAD_NO_HINTING ) == 0 ); 326 327 t1glyph->format = FT_GLYPH_FORMAT_OUTLINE; 328 329 error = decoder_funcs->init( &decoder, 330 t1glyph->face, 331 t1size, 332 t1glyph, 333 (FT_Byte**)type1->glyph_names, 334 face->blend, 335 FT_BOOL( hinting ), 336 FT_LOAD_TARGET_MODE( load_flags ), 337 T1_Parse_Glyph ); 338 if ( error ) 339 goto Exit; 340 341 must_finish_decoder = TRUE; 342 343 decoder.builder.no_recurse = FT_BOOL( 344 ( load_flags & FT_LOAD_NO_RECURSE ) != 0 ); 345 346 decoder.num_subrs = type1->num_subrs; 347 decoder.subrs = type1->subrs; 348 decoder.subrs_len = type1->subrs_len; 349 350 decoder.buildchar = face->buildchar; 351 decoder.len_buildchar = face->len_buildchar; 352 353 /* now load the unscaled outline */ 354 error = T1_Parse_Glyph_And_Get_Char_String( &decoder, glyph_index, 355 &glyph_data ); 356 if ( error ) 357 goto Exit; 358 #ifdef FT_CONFIG_OPTION_INCREMENTAL 359 glyph_data_loaded = 1; 360 #endif 361 362 font_matrix = decoder.font_matrix; 363 font_offset = decoder.font_offset; 364 365 /* save new glyph tables */ 366 decoder_funcs->done( &decoder ); 367 368 must_finish_decoder = FALSE; 369 370 /* now, set the metrics -- this is rather simple, as */ 371 /* the left side bearing is the xMin, and the top side */ 372 /* bearing the yMax */ 373 if ( !error ) 374 { 375 t1glyph->outline.flags &= FT_OUTLINE_OWNER; 376 t1glyph->outline.flags |= FT_OUTLINE_REVERSE_FILL; 377 378 /* for composite glyphs, return only left side bearing and */ 379 /* advance width */ 380 if ( load_flags & FT_LOAD_NO_RECURSE ) 381 { 382 FT_Slot_Internal internal = t1glyph->internal; 383 384 385 t1glyph->metrics.horiBearingX = 386 FIXED_TO_INT( decoder.builder.left_bearing.x ); 387 t1glyph->metrics.horiAdvance = 388 FIXED_TO_INT( decoder.builder.advance.x ); 389 390 internal->glyph_matrix = font_matrix; 391 internal->glyph_delta = font_offset; 392 internal->glyph_transformed = 1; 393 } 394 else 395 { 396 FT_BBox cbox; 397 FT_Glyph_Metrics* metrics = &t1glyph->metrics; 398 399 400 /* copy the _unscaled_ advance width */ 401 metrics->horiAdvance = 402 FIXED_TO_INT( decoder.builder.advance.x ); 403 t1glyph->linearHoriAdvance = 404 FIXED_TO_INT( decoder.builder.advance.x ); 405 t1glyph->internal->glyph_transformed = 0; 406 407 if ( load_flags & FT_LOAD_VERTICAL_LAYOUT ) 408 { 409 /* make up vertical ones */ 410 metrics->vertAdvance = ( face->type1.font_bbox.yMax - 411 face->type1.font_bbox.yMin ) >> 16; 412 t1glyph->linearVertAdvance = metrics->vertAdvance; 413 } 414 else 415 { 416 metrics->vertAdvance = 417 FIXED_TO_INT( decoder.builder.advance.y ); 418 t1glyph->linearVertAdvance = 419 FIXED_TO_INT( decoder.builder.advance.y ); 420 } 421 422 t1glyph->format = FT_GLYPH_FORMAT_OUTLINE; 423 424 if ( t1size && t1size->metrics.y_ppem < 24 ) 425 t1glyph->outline.flags |= FT_OUTLINE_HIGH_PRECISION; 426 427 #if 1 428 /* apply the font matrix, if any */ 429 if ( font_matrix.xx != 0x10000L || font_matrix.yy != 0x10000L || 430 font_matrix.xy != 0 || font_matrix.yx != 0 ) 431 { 432 FT_Outline_Transform( &t1glyph->outline, &font_matrix ); 433 434 metrics->horiAdvance = FT_MulFix( metrics->horiAdvance, 435 font_matrix.xx ); 436 metrics->vertAdvance = FT_MulFix( metrics->vertAdvance, 437 font_matrix.yy ); 438 } 439 440 if ( font_offset.x || font_offset.y ) 441 { 442 FT_Outline_Translate( &t1glyph->outline, 443 font_offset.x, 444 font_offset.y ); 445 446 metrics->horiAdvance += font_offset.x; 447 metrics->vertAdvance += font_offset.y; 448 } 449 #endif 450 451 if ( ( load_flags & FT_LOAD_NO_SCALE ) == 0 ) 452 { 453 /* scale the outline and the metrics */ 454 FT_Int n; 455 FT_Outline* cur = decoder.builder.base; 456 FT_Vector* vec = cur->points; 457 FT_Fixed x_scale = glyph->x_scale; 458 FT_Fixed y_scale = glyph->y_scale; 459 460 461 /* First of all, scale the points, if we are not hinting */ 462 if ( !hinting || ! decoder.builder.hints_funcs ) 463 for ( n = cur->n_points; n > 0; n--, vec++ ) 464 { 465 vec->x = FT_MulFix( vec->x, x_scale ); 466 vec->y = FT_MulFix( vec->y, y_scale ); 467 } 468 469 /* Then scale the metrics */ 470 metrics->horiAdvance = FT_MulFix( metrics->horiAdvance, x_scale ); 471 metrics->vertAdvance = FT_MulFix( metrics->vertAdvance, y_scale ); 472 } 473 474 /* compute the other metrics */ 475 FT_Outline_Get_CBox( &t1glyph->outline, &cbox ); 476 477 metrics->width = cbox.xMax - cbox.xMin; 478 metrics->height = cbox.yMax - cbox.yMin; 479 480 metrics->horiBearingX = cbox.xMin; 481 metrics->horiBearingY = cbox.yMax; 482 483 if ( load_flags & FT_LOAD_VERTICAL_LAYOUT ) 484 { 485 /* make up vertical ones */ 486 ft_synthesize_vertical_metrics( metrics, 487 metrics->vertAdvance ); 488 } 489 } 490 491 /* Set control data to the glyph charstrings. Note that this is */ 492 /* _not_ zero-terminated. */ 493 t1glyph->control_data = (FT_Byte*)glyph_data.pointer; 494 t1glyph->control_len = glyph_data.length; 495 } 496 497 498 Exit: 499 500 #ifdef FT_CONFIG_OPTION_INCREMENTAL 501 if ( glyph_data_loaded && face->root.internal->incremental_interface ) 502 { 503 face->root.internal->incremental_interface->funcs->free_glyph_data( 504 face->root.internal->incremental_interface->object, 505 &glyph_data ); 506 507 /* Set the control data to null - it is no longer available if */ 508 /* loaded incrementally. */ 509 t1glyph->control_data = NULL; 510 t1glyph->control_len = 0; 511 } 512 #endif 513 514 if ( must_finish_decoder ) 515 decoder_funcs->done( &decoder ); 516 517 return error; 518 } 519 520 521 /* END */ 522
