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; 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 */ 518