[3019] | 1 | /* |
---|
| 2 | * The font parser using the FreeType library version 2. |
---|
| 3 | * |
---|
| 4 | * see COPYRIGHT |
---|
| 5 | * |
---|
| 6 | */ |
---|
| 7 | |
---|
| 8 | #ifdef USE_FREETYPE |
---|
| 9 | |
---|
| 10 | #include <stdio.h> |
---|
| 11 | #include <string.h> |
---|
| 12 | #include <stdlib.h> |
---|
| 13 | #include <ctype.h> |
---|
| 14 | #include <sys/types.h> |
---|
| 15 | #include <freetype/config/ftheader.h> |
---|
| 16 | #include <freetype/freetype.h> |
---|
| 17 | #include <freetype/ftglyph.h> |
---|
| 18 | #include <freetype/ftsnames.h> |
---|
| 19 | #include <freetype/ttnameid.h> |
---|
| 20 | #include <freetype/ftoutln.h> |
---|
| 21 | #include "pt1.h" |
---|
| 22 | #include "global.h" |
---|
| 23 | |
---|
| 24 | /* prototypes of call entries */ |
---|
| 25 | static void openfont(char *fname, char *arg); |
---|
| 26 | static void closefont( void); |
---|
| 27 | static int getnglyphs ( void); |
---|
| 28 | static int glnames( GLYPH *glyph_list); |
---|
| 29 | static void glmetrics( GLYPH *glyph_list); |
---|
| 30 | static int glenc( GLYPH *glyph_list, int *encoding, int *unimap); |
---|
| 31 | static void fnmetrics( struct font_metrics *fm); |
---|
| 32 | static void glpath( int glyphno, GLYPH *glyph_list); |
---|
| 33 | static void kerning( GLYPH *glyph_list); |
---|
| 34 | |
---|
| 35 | /* globals */ |
---|
| 36 | |
---|
| 37 | /* front-end descriptor */ |
---|
| 38 | struct frontsw freetype_sw = { |
---|
| 39 | /*name*/ "ft", |
---|
| 40 | /*descr*/ "based on the FreeType library", |
---|
| 41 | /*suffix*/ { "ttf", "otf", "pfa", "pfb" }, |
---|
| 42 | /*open*/ openfont, |
---|
| 43 | /*close*/ closefont, |
---|
| 44 | /*nglyphs*/ getnglyphs, |
---|
| 45 | /*glnames*/ glnames, |
---|
| 46 | /*glmetrics*/ glmetrics, |
---|
| 47 | /*glenc*/ glenc, |
---|
| 48 | /*fnmetrics*/ fnmetrics, |
---|
| 49 | /*glpath*/ glpath, |
---|
| 50 | /*kerning*/ kerning, |
---|
| 51 | }; |
---|
| 52 | |
---|
| 53 | /* statics */ |
---|
| 54 | |
---|
| 55 | static FT_Library library; |
---|
| 56 | static FT_Face face; |
---|
| 57 | |
---|
| 58 | static int enc_type, enc_found; |
---|
| 59 | |
---|
| 60 | /* SFNT functions do not seem to be included by default in FT2beta8 */ |
---|
| 61 | #define ENABLE_SFNT |
---|
| 62 | |
---|
| 63 | /* |
---|
| 64 | * Open font and prepare to return information to the main driver. |
---|
| 65 | * May print error and warning messages. |
---|
| 66 | * Exit on error. |
---|
| 67 | */ |
---|
| 68 | |
---|
| 69 | static void |
---|
| 70 | openfont( |
---|
| 71 | char *fname, |
---|
| 72 | char *arg /* unused now */ |
---|
| 73 | ) |
---|
| 74 | { |
---|
| 75 | FT_Error error; |
---|
| 76 | |
---|
| 77 | if( FT_Init_FreeType( &library ) ) { |
---|
| 78 | fprintf(stderr, "** FreeType initialization failed\n"); |
---|
| 79 | exit(1); |
---|
| 80 | } |
---|
| 81 | |
---|
| 82 | if( error = FT_New_Face( library, fname, 0, &face ) ) { |
---|
| 83 | if ( error == FT_Err_Unknown_File_Format ) |
---|
| 84 | fprintf(stderr, "**** %s has format unknown to FreeType\n", fname); |
---|
| 85 | else |
---|
| 86 | fprintf(stderr, "**** Cannot access %s ****\n", fname); |
---|
| 87 | exit(1); |
---|
| 88 | } |
---|
| 89 | |
---|
| 90 | if(FT_HAS_FIXED_SIZES(face)) { |
---|
| 91 | WARNING_1 fprintf(stderr, "Font contains bitmaps\n"); |
---|
| 92 | } |
---|
| 93 | if(FT_HAS_MULTIPLE_MASTERS(face)) { |
---|
| 94 | WARNING_1 fprintf(stderr, "Font contains multiple masters, using default\n"); |
---|
| 95 | } |
---|
| 96 | |
---|
| 97 | if(ISDBG(FT)) fprintf(stderr," %d units per EM\n", face->units_per_EM); |
---|
| 98 | |
---|
| 99 | enc_found = 0; |
---|
| 100 | } |
---|
| 101 | |
---|
| 102 | /* |
---|
| 103 | * Close font. |
---|
| 104 | * Exit on error. |
---|
| 105 | */ |
---|
| 106 | |
---|
| 107 | static void |
---|
| 108 | closefont( |
---|
| 109 | void |
---|
| 110 | ) |
---|
| 111 | { |
---|
| 112 | if( FT_Done_Face(face) ) { |
---|
| 113 | WARNING_1 fprintf(stderr, "Errors when closing the font file, ignored\n"); |
---|
| 114 | } |
---|
| 115 | if( FT_Done_FreeType(library) ) { |
---|
| 116 | WARNING_1 fprintf(stderr, "Errors when stopping FreeType, ignored\n"); |
---|
| 117 | } |
---|
| 118 | } |
---|
| 119 | |
---|
| 120 | /* |
---|
| 121 | * Get the number of glyphs in font. |
---|
| 122 | */ |
---|
| 123 | |
---|
| 124 | static int |
---|
| 125 | getnglyphs ( |
---|
| 126 | void |
---|
| 127 | ) |
---|
| 128 | { |
---|
| 129 | if(ISDBG(FT)) fprintf(stderr, "%d glyphs in font\n", face->num_glyphs); |
---|
| 130 | return (int)face->num_glyphs; |
---|
| 131 | } |
---|
| 132 | |
---|
| 133 | /* |
---|
| 134 | * Get the names of the glyphs. |
---|
| 135 | * Returns 0 if the names were assigned, non-zero if the font |
---|
| 136 | * provides no glyph names. |
---|
| 137 | */ |
---|
| 138 | |
---|
| 139 | static int |
---|
| 140 | glnames( |
---|
| 141 | GLYPH *glyph_list |
---|
| 142 | ) |
---|
| 143 | { |
---|
| 144 | #define MAX_NAMELEN 1024 |
---|
| 145 | unsigned char bf[1024]; |
---|
| 146 | int i; |
---|
| 147 | |
---|
| 148 | if( ! FT_HAS_GLYPH_NAMES(face) ) { |
---|
| 149 | WARNING_1 fprintf(stderr, "Font has no glyph names\n"); |
---|
| 150 | return 1; |
---|
| 151 | } |
---|
| 152 | |
---|
| 153 | for(i=0; i < face->num_glyphs; i++) { |
---|
| 154 | if( FT_Get_Glyph_Name(face, i, bf, MAX_NAMELEN) || bf[0]==0 ) { |
---|
| 155 | sprintf(bf, "_g_%d", i); |
---|
| 156 | WARNING_2 fprintf(stderr, |
---|
| 157 | "Glyph No. %d has no postscript name, becomes %s\n", i, bf); |
---|
| 158 | } |
---|
| 159 | glyph_list[i].name = strdup(bf); |
---|
| 160 | if(ISDBG(FT)) fprintf(stderr, "%d has name %s\n", i, bf); |
---|
| 161 | if (glyph_list[i].name == NULL) { |
---|
| 162 | fprintf (stderr, "****malloc failed %s line %d\n", __FILE__, __LINE__); |
---|
| 163 | exit(255); |
---|
| 164 | } |
---|
| 165 | } |
---|
| 166 | return 0; |
---|
| 167 | } |
---|
| 168 | |
---|
| 169 | /* |
---|
| 170 | * Get the metrics of the glyphs. |
---|
| 171 | */ |
---|
| 172 | |
---|
| 173 | static void |
---|
| 174 | glmetrics( |
---|
| 175 | GLYPH *glyph_list |
---|
| 176 | ) |
---|
| 177 | { |
---|
| 178 | GLYPH *g; |
---|
| 179 | int i; |
---|
| 180 | FT_Glyph_Metrics *met; |
---|
| 181 | FT_BBox bbox; |
---|
| 182 | FT_Glyph gly; |
---|
| 183 | FT_ULong charcode; |
---|
| 184 | FT_UInt index; |
---|
| 185 | |
---|
| 186 | for(i=0; i < face->num_glyphs; i++) { |
---|
| 187 | g = &(glyph_list[i]); |
---|
| 188 | |
---|
| 189 | if( FT_Load_Glyph(face, i, FT_LOAD_NO_BITMAP|FT_LOAD_NO_SCALE) ) { |
---|
| 190 | fprintf(stderr, "Can't load glyph %s, skipped\n", g->name); |
---|
| 191 | continue; |
---|
| 192 | } |
---|
| 193 | |
---|
| 194 | met = &face->glyph->metrics; |
---|
| 195 | |
---|
| 196 | if(FT_HAS_HORIZONTAL(face)) { |
---|
| 197 | g->width = met->horiAdvance; |
---|
| 198 | g->lsb = met->horiBearingX; |
---|
| 199 | } else { |
---|
| 200 | WARNING_2 fprintf(stderr, "Glyph %s has no horizontal metrics, guessed them\n", g->name); |
---|
| 201 | g->width = met->width; |
---|
| 202 | g->lsb = 0; |
---|
| 203 | } |
---|
| 204 | |
---|
| 205 | if( FT_Get_Glyph(face->glyph, &gly) ) { |
---|
| 206 | fprintf(stderr, "Can't access glyph %s bbox, skipped\n", g->name); |
---|
| 207 | continue; |
---|
| 208 | } |
---|
| 209 | |
---|
| 210 | FT_Glyph_Get_CBox(gly, ft_glyph_bbox_unscaled, &bbox); |
---|
| 211 | g->xMin = bbox.xMin; |
---|
| 212 | g->yMin = bbox.yMin; |
---|
| 213 | g->xMax = bbox.xMax; |
---|
| 214 | g->yMax = bbox.yMax; |
---|
| 215 | |
---|
| 216 | g->ttf_pathlen = face->glyph->outline.n_points; |
---|
| 217 | |
---|
| 218 | } |
---|
| 219 | |
---|
| 220 | charcode = FT_Get_First_Char(face, &index); |
---|
| 221 | while ( index != 0 ) { |
---|
| 222 | if ( index >= face->num_glyphs ) { |
---|
| 223 | break; |
---|
| 224 | } |
---|
| 225 | for ( i = 0; i < GLYPH_MAX_ENCODINGS; i++ ) { |
---|
| 226 | if ( glyph_list[index].orig_code[i] == -1 ) |
---|
| 227 | break; |
---|
| 228 | } |
---|
| 229 | |
---|
| 230 | if ( i == GLYPH_MAX_ENCODINGS ) { |
---|
| 231 | if (strcmp(glyph_list[index].name, ".notdef") != 0) { |
---|
| 232 | WARNING_2 fprintf(stderr, |
---|
| 233 | "Glyph %s has >= %d encodings (A), %4.4x & %4.4x\n", |
---|
| 234 | GLYPH_MAX_ENCODINGS, |
---|
| 235 | glyph_list[index].name, |
---|
| 236 | glyph_list[index].orig_code[i], |
---|
| 237 | charcode); |
---|
| 238 | } |
---|
| 239 | } else { |
---|
| 240 | glyph_list[index].orig_code[i] = charcode; |
---|
| 241 | } |
---|
| 242 | |
---|
| 243 | charcode = FT_Get_Next_Char(face, charcode, &index); |
---|
| 244 | } |
---|
| 245 | } |
---|
| 246 | |
---|
| 247 | /* |
---|
| 248 | * Get the original encoding of the font. |
---|
| 249 | * Returns 1 for if the original encoding is Unicode, 2 if the |
---|
| 250 | * original encoding is other 16-bit, 0 if 8-bit. |
---|
| 251 | */ |
---|
| 252 | |
---|
| 253 | static int |
---|
| 254 | glenc( |
---|
| 255 | GLYPH *glyph_list, |
---|
| 256 | int *encoding, |
---|
| 257 | int *unimap |
---|
| 258 | ) |
---|
| 259 | { |
---|
| 260 | int i, e; |
---|
| 261 | unsigned code, index; |
---|
| 262 | |
---|
| 263 | if(ISDBG(FT)) |
---|
| 264 | for(e=0; e < face->num_charmaps; e++) { |
---|
| 265 | fprintf(stderr, "found encoding pid=%d eid=%d\n", |
---|
| 266 | face->charmaps[e]->platform_id, |
---|
| 267 | face->charmaps[e]->encoding_id); |
---|
| 268 | } |
---|
| 269 | |
---|
| 270 | if(enc_found) |
---|
| 271 | goto populate_map; |
---|
| 272 | |
---|
| 273 | enc_type = 0; |
---|
| 274 | |
---|
| 275 | /* first check for an explicit PID/EID */ |
---|
| 276 | |
---|
| 277 | if(force_pid != -1) { |
---|
| 278 | for(e=0; e < face->num_charmaps; e++) { |
---|
| 279 | if(face->charmaps[e]->platform_id == force_pid |
---|
| 280 | && face->charmaps[e]->encoding_id == force_eid) { |
---|
| 281 | WARNING_1 fprintf(stderr, "Found Encoding PID=%d/EID=%d\n", |
---|
| 282 | force_pid, force_eid); |
---|
| 283 | if( !face->charmaps || FT_Set_Charmap(face, face->charmaps[e]) ) { |
---|
| 284 | fprintf(stderr, "**** Cannot set charmap in FreeType ****\n"); |
---|
| 285 | exit(1); |
---|
| 286 | } |
---|
| 287 | enc_type = 1; |
---|
| 288 | goto populate_map; |
---|
| 289 | } |
---|
| 290 | } |
---|
| 291 | fprintf(stderr, "*** TTF encoding table PID=%d/EID=%d not found\n", |
---|
| 292 | force_pid, force_eid); |
---|
| 293 | exit(1); |
---|
| 294 | } |
---|
| 295 | |
---|
| 296 | /* next check for a direct Adobe mapping */ |
---|
| 297 | |
---|
| 298 | if(!forcemap) { |
---|
| 299 | for(e=0; e < face->num_charmaps; e++) { |
---|
| 300 | if(face->charmaps[e]->encoding == ft_encoding_adobe_custom) { |
---|
| 301 | WARNING_1 fputs("Found Adobe Custom Encoding\n", stderr); |
---|
| 302 | if( FT_Set_Charmap(face, face->charmaps[e]) ) { |
---|
| 303 | fprintf(stderr, "**** Cannot set charmap in FreeType ****\n"); |
---|
| 304 | exit(1); |
---|
| 305 | } |
---|
| 306 | goto populate_map; |
---|
| 307 | } |
---|
| 308 | } |
---|
| 309 | } |
---|
| 310 | |
---|
| 311 | for(e=0; e < face->num_charmaps; e++) { |
---|
| 312 | if(face->charmaps[e]->platform_id == 3) { |
---|
| 313 | switch(face->charmaps[e]->encoding_id) { |
---|
| 314 | case 0: |
---|
| 315 | WARNING_1 fputs("Found Symbol Encoding\n", stderr); |
---|
| 316 | break; |
---|
| 317 | case 1: |
---|
| 318 | WARNING_1 fputs("Found Unicode Encoding\n", stderr); |
---|
| 319 | enc_type = 1; |
---|
| 320 | break; |
---|
| 321 | default: |
---|
| 322 | WARNING_1 { |
---|
| 323 | fprintf(stderr, |
---|
| 324 | "****MS Encoding ID %d not supported****\n", |
---|
| 325 | face->charmaps[e]->encoding_id); |
---|
| 326 | fputs("Treating it like Symbol encoding\n", stderr); |
---|
| 327 | } |
---|
| 328 | break; |
---|
| 329 | } |
---|
| 330 | break; |
---|
| 331 | } |
---|
| 332 | } |
---|
| 333 | if(e >= face->num_charmaps) { |
---|
| 334 | WARNING_1 fputs("No Microsoft encoding, using first encoding available\n", stderr); |
---|
| 335 | e = 0; |
---|
| 336 | } |
---|
| 337 | |
---|
| 338 | if( FT_Set_Charmap(face, face->charmaps[e]) ) { |
---|
| 339 | fprintf(stderr, "**** Cannot set charmap in FreeType ****\n"); |
---|
| 340 | exit(1); |
---|
| 341 | } |
---|
| 342 | |
---|
| 343 | populate_map: |
---|
| 344 | enc_found = 1; |
---|
| 345 | |
---|
| 346 | for(i=0; i<ENCTABSZ; i++) { |
---|
| 347 | if(encoding[i] != -1) |
---|
| 348 | continue; |
---|
| 349 | if(enc_type == 1 || forcemap) { |
---|
| 350 | code = unimap[i]; |
---|
| 351 | if(code == (unsigned) -1) |
---|
| 352 | continue; |
---|
| 353 | } else |
---|
| 354 | code = i; |
---|
| 355 | |
---|
| 356 | code = FT_Get_Char_Index(face, code); |
---|
| 357 | if(0 && ISDBG(FT)) fprintf(stderr, "code of %3d is %3d\n", i, code); |
---|
| 358 | if(code == 0) |
---|
| 359 | continue; /* .notdef */ |
---|
| 360 | encoding[i] = code; |
---|
| 361 | } |
---|
| 362 | |
---|
| 363 | return enc_type; |
---|
| 364 | } |
---|
| 365 | |
---|
| 366 | /* |
---|
| 367 | * Get the font metrics |
---|
| 368 | */ |
---|
| 369 | static void |
---|
| 370 | fnmetrics( |
---|
| 371 | struct font_metrics *fm |
---|
| 372 | ) |
---|
| 373 | { |
---|
| 374 | char *str; |
---|
| 375 | static char *fieldstocheck[3]; |
---|
| 376 | #ifdef ENABLE_SFNT |
---|
| 377 | FT_SfntName sn; |
---|
| 378 | #endif /* ENABLE_SFNT */ |
---|
| 379 | int i, j, len; |
---|
| 380 | |
---|
| 381 | fm->italic_angle = 0.0; /* FreeType hides the angle */ |
---|
| 382 | fm->underline_position = face->underline_position; |
---|
| 383 | fm->underline_thickness = face->underline_thickness; |
---|
| 384 | fm->is_fixed_pitch = FT_IS_FIXED_WIDTH(face); |
---|
| 385 | |
---|
| 386 | fm->ascender = face->ascender; |
---|
| 387 | fm->descender = face->descender; |
---|
| 388 | |
---|
| 389 | fm->units_per_em = face->units_per_EM; |
---|
| 390 | |
---|
| 391 | fm->bbox[0] = face->bbox.xMin; |
---|
| 392 | fm->bbox[1] = face->bbox.yMin; |
---|
| 393 | fm->bbox[2] = face->bbox.xMax; |
---|
| 394 | fm->bbox[3] = face->bbox.yMax; |
---|
| 395 | |
---|
| 396 | #ifdef ENABLE_SFNT |
---|
| 397 | if( FT_Get_Sfnt_Name(face, TT_NAME_ID_COPYRIGHT, &sn) ) |
---|
| 398 | #endif /* ENABLE_SFNT */ |
---|
| 399 | fm->name_copyright = ""; |
---|
| 400 | #ifdef ENABLE_SFNT |
---|
| 401 | else |
---|
| 402 | fm->name_copyright = dupcnstring(sn.string, sn.string_len); |
---|
| 403 | #endif /* ENABLE_SFNT */ |
---|
| 404 | |
---|
| 405 | fm->name_family = face->family_name; |
---|
| 406 | |
---|
| 407 | fm->name_style = face->style_name; |
---|
| 408 | if(fm->name_style == NULL) |
---|
| 409 | fm->name_style = ""; |
---|
| 410 | |
---|
| 411 | #ifdef ENABLE_SFNT |
---|
| 412 | if( FT_Get_Sfnt_Name(face, TT_NAME_ID_FULL_NAME, &sn) ) |
---|
| 413 | #endif /* ENABLE_SFNT */ |
---|
| 414 | { |
---|
| 415 | int len; |
---|
| 416 | |
---|
| 417 | len = strlen(fm->name_family) + strlen(fm->name_style) + 2; |
---|
| 418 | if(( fm->name_full = malloc(len) )==NULL) { |
---|
| 419 | fprintf (stderr, "****malloc failed %s line %d\n", __FILE__, __LINE__); |
---|
| 420 | exit(255); |
---|
| 421 | } |
---|
| 422 | strcpy(fm->name_full, fm->name_family); |
---|
| 423 | if(strlen(fm->name_style) != 0) { |
---|
| 424 | strcat(fm->name_full, " "); |
---|
| 425 | strcat(fm->name_full, fm->name_style); |
---|
| 426 | } |
---|
| 427 | } |
---|
| 428 | #ifdef ENABLE_SFNT |
---|
| 429 | else |
---|
| 430 | fm->name_full = dupcnstring(sn.string, sn.string_len); |
---|
| 431 | #endif /* ENABLE_SFNT */ |
---|
| 432 | |
---|
| 433 | #ifdef ENABLE_SFNT |
---|
| 434 | if( FT_Get_Sfnt_Name(face, TT_NAME_ID_VERSION_STRING, &sn) ) |
---|
| 435 | #endif /* ENABLE_SFNT */ |
---|
| 436 | fm->name_version = "1.0"; |
---|
| 437 | #ifdef ENABLE_SFNT |
---|
| 438 | else |
---|
| 439 | fm->name_version = dupcnstring(sn.string, sn.string_len); |
---|
| 440 | #endif /* ENABLE_SFNT */ |
---|
| 441 | |
---|
| 442 | #ifdef ENABLE_SFNT |
---|
| 443 | if( FT_Get_Sfnt_Name(face, TT_NAME_ID_PS_NAME , &sn) ) { |
---|
| 444 | #endif /* ENABLE_SFNT */ |
---|
| 445 | if(( fm->name_ps = strdup(fm->name_full) )==NULL) { |
---|
| 446 | fprintf (stderr, "****malloc failed %s line %d\n", __FILE__, __LINE__); |
---|
| 447 | exit(255); |
---|
| 448 | } |
---|
| 449 | #ifdef ENABLE_SFNT |
---|
| 450 | } else |
---|
| 451 | fm->name_ps = dupcnstring(sn.string, sn.string_len); |
---|
| 452 | #endif /* ENABLE_SFNT */ |
---|
| 453 | for(i=0; fm->name_ps[i]!=0; i++) |
---|
| 454 | if(fm->name_ps[i] == ' ') |
---|
| 455 | fm->name_ps[i] = '_'; /* no spaces in the Postscript name *m |
---|
| 456 | |
---|
| 457 | /* guess the boldness from the font names */ |
---|
| 458 | fm->force_bold=0; |
---|
| 459 | |
---|
| 460 | fieldstocheck[0] = fm->name_style; |
---|
| 461 | fieldstocheck[1] = fm->name_full; |
---|
| 462 | fieldstocheck[2] = fm->name_ps; |
---|
| 463 | |
---|
| 464 | for(i=0; !fm->force_bold && i<sizeof fieldstocheck /sizeof(fieldstocheck[0]); i++) { |
---|
| 465 | str=fieldstocheck[i]; |
---|
| 466 | len = strlen(str); |
---|
| 467 | for(j=0; j<len; j++) { |
---|
| 468 | if( (str[j]=='B' |
---|
| 469 | || str[j]=='b' |
---|
| 470 | && ( j==0 || !isalpha(str[j-1]) ) |
---|
| 471 | ) |
---|
| 472 | && !strncmp("old",&str[j+1],3) |
---|
| 473 | && (j+4 >= len || !islower(str[j+4])) |
---|
| 474 | ) { |
---|
| 475 | fm->force_bold=1; |
---|
| 476 | break; |
---|
| 477 | } |
---|
| 478 | } |
---|
| 479 | } |
---|
| 480 | } |
---|
| 481 | |
---|
| 482 | /* |
---|
| 483 | * Functions to decompose the outlines |
---|
| 484 | */ |
---|
| 485 | |
---|
| 486 | static GLYPH *curg; |
---|
| 487 | static double lastx, lasty; |
---|
| 488 | |
---|
| 489 | static int |
---|
| 490 | outl_moveto( |
---|
| 491 | FT_Vector *to, |
---|
| 492 | void *unused |
---|
| 493 | ) |
---|
| 494 | { |
---|
| 495 | double tox, toy; |
---|
| 496 | |
---|
| 497 | tox = fscale((double)to->x); toy = fscale((double)to->y); |
---|
| 498 | |
---|
| 499 | /* FreeType does not do explicit closepath() */ |
---|
| 500 | if(curg->lastentry) { |
---|
| 501 | g_closepath(curg); |
---|
| 502 | } |
---|
| 503 | fg_rmoveto(curg, tox, toy); |
---|
| 504 | lastx = tox; lasty = toy; |
---|
| 505 | |
---|
| 506 | return 0; |
---|
| 507 | } |
---|
| 508 | |
---|
| 509 | static int |
---|
| 510 | outl_lineto( |
---|
| 511 | FT_Vector *to, |
---|
| 512 | void *unused |
---|
| 513 | ) |
---|
| 514 | { |
---|
| 515 | double tox, toy; |
---|
| 516 | |
---|
| 517 | tox = fscale((double)to->x); toy = fscale((double)to->y); |
---|
| 518 | |
---|
| 519 | fg_rlineto(curg, tox, toy); |
---|
| 520 | lastx = tox; lasty = toy; |
---|
| 521 | |
---|
| 522 | return 0; |
---|
| 523 | } |
---|
| 524 | |
---|
| 525 | static int |
---|
| 526 | outl_conicto( |
---|
| 527 | FT_Vector *control1, |
---|
| 528 | FT_Vector *to, |
---|
| 529 | void *unused |
---|
| 530 | ) |
---|
| 531 | { |
---|
| 532 | double c1x, c1y, tox, toy; |
---|
| 533 | |
---|
| 534 | c1x = fscale((double)control1->x); c1y = fscale((double)control1->y); |
---|
| 535 | tox = fscale((double)to->x); toy = fscale((double)to->y); |
---|
| 536 | |
---|
| 537 | fg_rrcurveto(curg, |
---|
| 538 | (lastx + 2.0 * c1x) / 3.0, (lasty + 2.0 * c1y) / 3.0, |
---|
| 539 | (2.0 * c1x + tox) / 3.0, (2.0 * c1y + toy) / 3.0, |
---|
| 540 | tox, toy ); |
---|
| 541 | lastx = tox; lasty = toy; |
---|
| 542 | |
---|
| 543 | return 0; |
---|
| 544 | } |
---|
| 545 | |
---|
| 546 | static int |
---|
| 547 | outl_cubicto( |
---|
| 548 | FT_Vector *control1, |
---|
| 549 | FT_Vector *control2, |
---|
| 550 | FT_Vector *to, |
---|
| 551 | void *unused |
---|
| 552 | ) |
---|
| 553 | { |
---|
| 554 | double c1x, c1y, c2x, c2y, tox, toy; |
---|
| 555 | |
---|
| 556 | c1x = fscale((double)control1->x); c1y = fscale((double)control1->y); |
---|
| 557 | c2x = fscale((double)control2->x); c2y = fscale((double)control2->y); |
---|
| 558 | tox = fscale((double)to->x); toy = fscale((double)to->y); |
---|
| 559 | |
---|
| 560 | fg_rrcurveto(curg, c1x, c1y, c2x, c2y, tox, toy); |
---|
| 561 | lastx = tox; lasty = toy; |
---|
| 562 | |
---|
| 563 | return 0; |
---|
| 564 | } |
---|
| 565 | |
---|
| 566 | static FT_Outline_Funcs ft_outl_funcs = { |
---|
| 567 | outl_moveto, |
---|
| 568 | outl_lineto, |
---|
| 569 | outl_conicto, |
---|
| 570 | outl_cubicto, |
---|
| 571 | 0, |
---|
| 572 | 0 |
---|
| 573 | }; |
---|
| 574 | |
---|
| 575 | /* |
---|
| 576 | * Get the path of contrours for a glyph. |
---|
| 577 | */ |
---|
| 578 | |
---|
| 579 | static void |
---|
| 580 | glpath( |
---|
| 581 | int glyphno, |
---|
| 582 | GLYPH *glyf_list |
---|
| 583 | ) |
---|
| 584 | { |
---|
| 585 | FT_Outline *ol; |
---|
| 586 | |
---|
| 587 | curg = &glyf_list[glyphno]; |
---|
| 588 | |
---|
| 589 | if( FT_Load_Glyph(face, glyphno, FT_LOAD_NO_BITMAP|FT_LOAD_NO_SCALE|FT_LOAD_NO_HINTING) |
---|
| 590 | || face->glyph->format != ft_glyph_format_outline ) { |
---|
| 591 | fprintf(stderr, "Can't load glyph %s, skipped\n", curg->name); |
---|
| 592 | return; |
---|
| 593 | } |
---|
| 594 | |
---|
| 595 | ol = &face->glyph->outline; |
---|
| 596 | lastx = 0.0; lasty = 0.0; |
---|
| 597 | |
---|
| 598 | if( FT_Outline_Decompose(ol, &ft_outl_funcs, NULL) ) { |
---|
| 599 | fprintf(stderr, "Can't decompose outline of glyph %s, skipped\n", curg->name); |
---|
| 600 | return; |
---|
| 601 | } |
---|
| 602 | |
---|
| 603 | /* FreeType does not do explicit closepath() */ |
---|
| 604 | if(curg->lastentry) { |
---|
| 605 | g_closepath(curg); |
---|
| 606 | } |
---|
| 607 | |
---|
| 608 | if(ol->flags & ft_outline_reverse_fill) { |
---|
| 609 | assertpath(curg->entries, __FILE__, __LINE__, curg->name); |
---|
| 610 | reversepaths(curg); |
---|
| 611 | } |
---|
| 612 | } |
---|
| 613 | |
---|
| 614 | /* |
---|
| 615 | * Get the kerning data. |
---|
| 616 | */ |
---|
| 617 | |
---|
| 618 | static void |
---|
| 619 | kerning( |
---|
| 620 | GLYPH *glyph_list |
---|
| 621 | ) |
---|
| 622 | { |
---|
| 623 | int i, j, n; |
---|
| 624 | int nglyphs = face->num_glyphs; |
---|
| 625 | FT_Vector k; |
---|
| 626 | GLYPH *gl; |
---|
| 627 | |
---|
| 628 | if( nglyphs == 0 || !FT_HAS_KERNING(face) ) { |
---|
| 629 | WARNING_1 fputs("No Kerning data\n", stderr); |
---|
| 630 | return; |
---|
| 631 | } |
---|
| 632 | |
---|
| 633 | for(i=0; i<nglyphs; i++) { |
---|
| 634 | if( (glyph_list[i].flags & GF_USED) ==0) |
---|
| 635 | continue; |
---|
| 636 | for(j=0; j<nglyphs; j++) { |
---|
| 637 | if( (glyph_list[j].flags & GF_USED) ==0) |
---|
| 638 | continue; |
---|
| 639 | if( FT_Get_Kerning(face, i, j, ft_kerning_unscaled, &k) ) |
---|
| 640 | continue; |
---|
| 641 | if( k.x == 0 ) |
---|
| 642 | continue; |
---|
| 643 | |
---|
| 644 | addkernpair(i, j, k.x); |
---|
| 645 | } |
---|
| 646 | } |
---|
| 647 | } |
---|
| 648 | |
---|
| 649 | #endif |
---|