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[wxWidgets.git] / src / freetype / type1 / t1objs.c
1 /***************************************************************************/
2 /* */
3 /* t1objs.c */
4 /* */
5 /* Type 1 objects manager (body). */
6 /* */
7 /* Copyright 1996-2000 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 <freetype/internal/ftdebug.h>
20 #include <freetype/internal/ftstream.h>
21
22
23 #ifdef FT_FLAT_COMPILE
24
25 #include "t1gload.h"
26 #include "t1load.h"
27 #include "t1afm.h"
28
29 #ifndef T1_CONFIG_OPTION_DISABLE_HINTER
30 #include "t1hinter.h"
31 #endif
32
33 #else /* FT_FLAT_COMPILE */
34
35 #include <type1/t1gload.h>
36 #include <type1/t1load.h>
37 #include <type1/t1afm.h>
38
39 #ifndef T1_CONFIG_OPTION_DISABLE_HINTER
40 #include <type1/t1hinter.h>
41 #endif
42
43 #endif /* FT_FLAT_COMPILE */
44
45
46 #include <freetype/internal/psnames.h>
47
48
49 /*************************************************************************/
50 /* */
51 /* The macro FT_COMPONENT is used in trace mode. It is an implicit */
52 /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
53 /* messages during execution. */
54 /* */
55 #undef FT_COMPONENT
56 #define FT_COMPONENT trace_t1objs
57
58
59 /*************************************************************************/
60 /* */
61 /* SIZE FUNCTIONS */
62 /* */
63 /*************************************************************************/
64
65
66 /*************************************************************************/
67 /* */
68 /* <Function> */
69 /* T1_Done_Size */
70 /* */
71 /* <Description> */
72 /* The Type 1 size object destructor. Used to discard a given size */
73 /* object. */
74 /* */
75 /* <Input> */
76 /* size :: A handle to the target size object. */
77 /* */
78 LOCAL_FUNC
79 void T1_Done_Size( T1_Size size )
80 {
81 if ( size )
82 {
83
84 #ifndef T1_CONFIG_OPTION_DISABLE_HINTER
85 T1_Done_Size_Hinter( size );
86 #endif
87
88 size->valid = 0;
89 }
90 }
91
92
93 /*************************************************************************/
94 /* */
95 /* <Function> */
96 /* T1_Init_Size */
97 /* */
98 /* <Description> */
99 /* The size object initializer. */
100 /* */
101 /* <Input> */
102 /* size :: A handle to the target size object. */
103 /* */
104 /* <Return> */
105 /* FreeTrue error code. 0 means success. */
106 /* */
107 LOCAL_DEF
108 FT_Error T1_Init_Size( T1_Size size )
109 {
110 FT_Error error;
111
112
113 size->valid = 0;
114
115 #ifndef T1_CONFIG_OPTION_DISABLE_HINTER
116 error = T1_New_Size_Hinter( size );
117
118 return error;
119 #else
120
121 FT_UNUSED( error );
122
123 return T1_Err_Ok;
124
125 #endif
126 }
127
128
129 /*************************************************************************/
130 /* */
131 /* <Function> */
132 /* T1_Reset_Size */
133 /* */
134 /* <Description> */
135 /* Resets an instance to a new pointsize/transform. This function is */
136 /* in charge of resetting the blue zones,a s well as the stem snap */
137 /* tables for a given size. */
138 /* */
139 /* <Input> */
140 /* size :: The target size object. */
141 /* */
142 /* <Output> */
143 /* FreeType error code. 0 means success. */
144 /* */
145 LOCAL_FUNC
146 FT_Error T1_Reset_Size( T1_Size size )
147 {
148 /* recompute ascender, descender, etc. */
149 T1_Face face = (T1_Face)size->root.face;
150 FT_Size_Metrics* metrics = &size->root.metrics;
151
152
153 if ( metrics->x_ppem < 1 || metrics->y_ppem < 1 )
154 return FT_Err_Invalid_Argument;
155
156 /* Compute root ascender, descender, test height, and max_advance */
157 metrics->ascender = ( FT_MulFix( face->root.ascender,
158 metrics->y_scale ) + 32 ) & -64;
159 metrics->descender = ( FT_MulFix( face->root.descender,
160 metrics->y_scale ) + 32 ) & -64;
161 metrics->height = ( FT_MulFix( face->root.height,
162 metrics->y_scale ) + 32 ) & -64;
163 metrics->max_advance = ( FT_MulFix( face->root.max_advance_width,
164 metrics->x_scale ) + 32 ) & -64;
165
166 #ifndef T1_CONFIG_OPTION_DISABLE_HINTER
167 return T1_Reset_Size_Hinter( size );
168 #else
169 return 0;
170 #endif
171 }
172
173
174 /*************************************************************************/
175 /* */
176 /* FACE FUNCTIONS */
177 /* */
178 /*************************************************************************/
179
180
181 /*************************************************************************/
182 /* */
183 /* <Function> */
184 /* T1_Done_Face */
185 /* */
186 /* <Description> */
187 /* The face object destructor. */
188 /* */
189 /* <Input> */
190 /* face :: A typeless pointer to the face object to destroy. */
191 /* */
192 LOCAL_FUNC
193 void T1_Done_Face( T1_Face face )
194 {
195 FT_Memory memory;
196 T1_Font* type1 = &face->type1;
197
198
199 if ( face )
200 {
201 memory = face->root.memory;
202
203 /* release font info strings */
204 {
205 T1_FontInfo* info = &type1->font_info;
206
207
208 FREE( info->version );
209 FREE( info->notice );
210 FREE( info->full_name );
211 FREE( info->family_name );
212 FREE( info->weight );
213 }
214
215 /* release top dictionary */
216 FREE( type1->charstrings_len );
217 FREE( type1->charstrings );
218 FREE( type1->glyph_names );
219
220 FREE( type1->subrs );
221 FREE( type1->subrs_len );
222
223 FREE( type1->subrs_block );
224 FREE( type1->charstrings_block );
225 FREE( type1->glyph_names_block );
226
227 FREE( type1->encoding.char_index );
228 FREE( type1->font_name );
229
230 #ifndef T1_CONFIG_OPTION_NO_AFM
231 /* release afm data if present */
232 if ( face->afm_data )
233 T1_Done_AFM( memory, (T1_AFM*)face->afm_data );
234 #endif
235
236 /* release unicode map, if any */
237 FREE( face->unicode_map.maps );
238 face->unicode_map.num_maps = 0;
239
240 face->root.family_name = 0;
241 face->root.style_name = 0;
242 }
243 }
244
245
246 /*************************************************************************/
247 /* */
248 /* <Function> */
249 /* T1_Init_Face */
250 /* */
251 /* <Description> */
252 /* The face object constructor. */
253 /* */
254 /* <Input> */
255 /* stream :: input stream where to load font data. */
256 /* */
257 /* face_index :: The index of the font face in the resource. */
258 /* */
259 /* num_params :: Number of additional generic parameters. Ignored. */
260 /* */
261 /* params :: Additional generic parameters. Ignored. */
262 /* */
263 /* <InOut> */
264 /* face :: The face record to build. */
265 /* */
266 /* <Return> */
267 /* FreeType error code. 0 means success. */
268 /* */
269 LOCAL_FUNC
270 FT_Error T1_Init_Face( FT_Stream stream,
271 T1_Face face,
272 FT_Int face_index,
273 FT_Int num_params,
274 FT_Parameter* params )
275 {
276 T1_Tokenizer tokenizer;
277 FT_Error error;
278 PSNames_Interface* psnames;
279
280 FT_UNUSED( num_params );
281 FT_UNUSED( params );
282 FT_UNUSED( face_index );
283 FT_UNUSED( face );
284
285
286 face->root.num_faces = 1;
287
288 psnames = (PSNames_Interface*)face->psnames;
289 if ( !psnames )
290 {
291 psnames = (PSNames_Interface*)
292 FT_Get_Module_Interface( FT_FACE_LIBRARY( face ),
293 "psnames" );
294
295 face->psnames = psnames;
296 }
297
298 /* open the tokenizer, this will also check the font format */
299 error = New_Tokenizer( stream, &tokenizer );
300 if ( error )
301 goto Fail;
302
303 /* if we just wanted to check the format, leave successfully now */
304 if ( face_index < 0 )
305 goto Leave;
306
307 /* check the face index */
308 if ( face_index != 0 )
309 {
310 FT_ERROR(( "T1_Init_Face: invalid face index\n" ));
311 error = T1_Err_Invalid_Argument;
312 goto Leave;
313 }
314
315 /* Now, load the font program into the face object */
316 {
317 T1_Parser parser;
318
319
320 Init_T1_Parser( &parser, face, tokenizer );
321 error = Parse_T1_FontProgram( &parser );
322 if ( error )
323 goto Leave;
324
325 /* Init the face object fields */
326 /* Now set up root face fields */
327 {
328 FT_Face root = (FT_Face)&face->root;
329 T1_Font* type1 = &face->type1;
330
331
332 root->num_glyphs = type1->num_glyphs;
333 root->num_charmaps = 1;
334
335 root->face_index = face_index;
336 root->face_flags = FT_FACE_FLAG_SCALABLE;
337
338 root->face_flags |= FT_FACE_FLAG_HORIZONTAL;
339
340 root->face_flags |= FT_FACE_FLAG_GLYPH_NAMES;
341
342 if ( type1->font_info.is_fixed_pitch )
343 root->face_flags |= FT_FACE_FLAG_FIXED_WIDTH;
344
345 /* XXX: TODO -- add kerning with .afm support */
346
347 /* get style name - be careful, some broken fonts only */
348 /* have a `/FontName' dictionary entry! */
349 root->family_name = type1->font_info.family_name;
350 if ( root->family_name )
351 {
352 char* full = type1->font_info.full_name;
353 char* family = root->family_name;
354
355
356 while ( *family && *full == *family )
357 {
358 family++;
359 full++;
360 }
361
362 root->style_name = ( *full == ' ' ? full + 1
363 : (char *)"Regular" );
364 }
365 else
366 {
367 /* do we have a `/FontName'? */
368 if (type1->font_name)
369 {
370 root->family_name = type1->font_name;
371 root->style_name = "Regular";
372 }
373 }
374
375 /* no embedded bitmap support */
376 root->num_fixed_sizes = 0;
377 root->available_sizes = 0;
378
379 root->bbox = type1->font_bbox;
380 root->units_per_EM = 1000;
381 root->ascender = (FT_Short)type1->font_bbox.yMax;
382 root->descender = -(FT_Short)type1->font_bbox.yMin;
383 root->height = ( ( root->ascender + root->descender) * 12 )
384 / 10;
385
386 /* now compute the maximum advance width */
387
388 root->max_advance_width = type1->private_dict.standard_width[0];
389
390 /* compute max advance width for proportional fonts */
391 if ( !type1->font_info.is_fixed_pitch )
392 {
393 FT_Int max_advance;
394
395
396 error = T1_Compute_Max_Advance( face, &max_advance );
397
398 /* in case of error, keep the standard width */
399 if ( !error )
400 root->max_advance_width = max_advance;
401 else
402 error = 0; /* clear error */
403 }
404
405 root->max_advance_height = root->height;
406
407 root->underline_position = type1->font_info.underline_position;
408 root->underline_thickness = type1->font_info.underline_thickness;
409
410 root->max_points = 0;
411 root->max_contours = 0;
412 }
413 }
414
415 /* charmap support - synthetize unicode charmap when possible */
416 {
417 FT_Face root = &face->root;
418 FT_CharMap charmap = face->charmaprecs;
419
420
421 /* synthesize a Unicode charmap if there is support in the `PSNames' */
422 /* module.. */
423 if ( face->psnames )
424 {
425 PSNames_Interface* psnames = (PSNames_Interface*)face->psnames;
426
427
428 if ( psnames->unicode_value )
429 {
430 error = psnames->build_unicodes(
431 root->memory,
432 face->type1.num_glyphs,
433 (const char**)face->type1.glyph_names,
434 &face->unicode_map );
435 if ( !error )
436 {
437 root->charmap = charmap;
438 charmap->face = (FT_Face)face;
439 charmap->encoding = ft_encoding_unicode;
440 charmap->platform_id = 3;
441 charmap->encoding_id = 1;
442 charmap++;
443 }
444
445 /* simply clear the error in case of failure (which really) */
446 /* means that out of memory or no unicode glyph names */
447 error = 0;
448 }
449 }
450
451 /* now, support either the standard, expert, or custom encodings */
452 charmap->face = (FT_Face)face;
453 charmap->platform_id = 7; /* a new platform id for Adobe fonts ?? */
454
455 switch ( face->type1.encoding_type )
456 {
457 case t1_encoding_standard:
458 charmap->encoding = ft_encoding_adobe_standard;
459 charmap->encoding_id = 0;
460 break;
461
462 case t1_encoding_expert:
463 charmap->encoding = ft_encoding_adobe_expert;
464 charmap->encoding_id = 1;
465 break;
466
467 default:
468 charmap->encoding = ft_encoding_adobe_custom;
469 charmap->encoding_id = 2;
470 break;
471 }
472
473 root->charmaps = face->charmaps;
474 root->num_charmaps = charmap - face->charmaprecs + 1;
475 face->charmaps[0] = &face->charmaprecs[0];
476 face->charmaps[1] = &face->charmaprecs[1];
477 }
478
479 Leave:
480 Done_Tokenizer( tokenizer );
481
482 Fail:
483 return error;
484 }
485
486
487 /*************************************************************************/
488 /* */
489 /* <Function> */
490 /* T1_Done_GlyphSlot */
491 /* */
492 /* <Description> */
493 /* The glyph slot object destructor. */
494 /* */
495 /* <Input> */
496 /* glyph :: The glyph slot handle to destroy. */
497 /* */
498 LOCAL_FUNC
499 void T1_Done_GlyphSlot( T1_GlyphSlot glyph )
500 {
501 #ifndef T1_CONFIG_OPTION_DISABLE_HINTER
502
503 T1_Done_Glyph_Hinter( glyph );
504
505 #else
506
507 FT_UNUSED( glyph );
508
509 #endif
510 }
511
512
513 /*************************************************************************/
514 /* */
515 /* <Function> */
516 /* T1_Init_GlyphSlot */
517 /* */
518 /* <Description> */
519 /* The glyph slot object constructor. */
520 /* */
521 /* <Input> */
522 /* glyph :: The glyph slot handle to initialize. */
523 /* */
524 LOCAL_FUNC
525 FT_Error T1_Init_GlyphSlot( T1_GlyphSlot glyph )
526 {
527 FT_Error error = FT_Err_Ok;
528
529
530 #ifndef T1_CONFIG_OPTION_DISABLE_HINTER
531
532 error = T1_New_Glyph_Hinter( glyph );
533
534 #else
535
536 FT_UNUSED( glyph );
537
538 #endif
539
540 return error;
541 }
542
543
544 /* END */
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