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source: trunk/poppler/freetype2/src/type1/t1objs.c @ 262

Last change on this file since 262 was 262, checked in by Eugene Romanenko, 12 years ago
PDF plugin: freetype library updated to version 2.3.8
File size: 20.1 KB

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1	/***************************************************************************/
2	/* */
3	/* t1objs.c */
4	/* */
5	/* Type 1 objects manager (body). */
6	/* */
7	/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 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 FT_INTERNAL_DEBUG_H
21	#include FT_INTERNAL_STREAM_H
22	#include FT_TRUETYPE_IDS_H
23
24	#include "t1gload.h"
25	#include "t1load.h"
26
27	#include "t1errors.h"
28
29	#ifndef T1_CONFIG_OPTION_NO_AFM
30	#include "t1afm.h"
31	#endif
32
33	#include FT_SERVICE_POSTSCRIPT_CMAPS_H
34	#include FT_INTERNAL_POSTSCRIPT_AUX_H
35
36
37	/*************************************************************************/
38	/* */
39	/* The macro FT_COMPONENT is used in trace mode. It is an implicit */
40	/* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
41	/* messages during execution. */
42	/* */
43	#undef FT_COMPONENT
44	#define FT_COMPONENT trace_t1objs
45
46
47	/*************************************************************************/
48	/* */
49	/* SIZE FUNCTIONS */
50	/* */
51	/* note that we store the global hints in the size's "internal" root */
52	/* field */
53	/* */
54	/*************************************************************************/
55
56
57	static PSH_Globals_Funcs
58	T1_Size_Get_Globals_Funcs( T1_Size size )
59	{
60	T1_Face face = (T1_Face)size->root.face;
61	PSHinter_Service pshinter = (PSHinter_Service)face->pshinter;
62	FT_Module module;
63
64
65	module = FT_Get_Module( size->root.face->driver->root.library,
66	"pshinter" );
67	return ( module && pshinter && pshinter->get_globals_funcs )
68	? pshinter->get_globals_funcs( module )
69	: 0 ;
70	}
71
72
73	FT_LOCAL_DEF( void )
74	T1_Size_Done( T1_Size size )
75	{
76	if ( size->root.internal )
77	{
78	PSH_Globals_Funcs funcs;
79
80
81	funcs = T1_Size_Get_Globals_Funcs( size );
82	if ( funcs )
83	funcs->destroy( (PSH_Globals)size->root.internal );
84
85	size->root.internal = 0;
86	}
87	}
88
89
90	FT_LOCAL_DEF( FT_Error )
91	T1_Size_Init( T1_Size size )
92	{
93	FT_Error error = T1_Err_Ok;
94	PSH_Globals_Funcs funcs = T1_Size_Get_Globals_Funcs( size );
95
96
97	if ( funcs )
98	{
99	PSH_Globals globals;
100	T1_Face face = (T1_Face)size->root.face;
101
102
103	error = funcs->create( size->root.face->memory,
104	&face->type1.private_dict, &globals );
105	if ( !error )
106	size->root.internal = (FT_Size_Internal)(void*)globals;
107	}
108
109	return error;
110	}
111
112
113	FT_LOCAL_DEF( FT_Error )
114	T1_Size_Request( T1_Size size,
115	FT_Size_Request req )
116	{
117	PSH_Globals_Funcs funcs = T1_Size_Get_Globals_Funcs( size );
118
119
120	FT_Request_Metrics( size->root.face, req );
121
122	if ( funcs )
123	funcs->set_scale( (PSH_Globals)size->root.internal,
124	size->root.metrics.x_scale,
125	size->root.metrics.y_scale,
126	0, 0 );
127
128	return T1_Err_Ok;
129	}
130
131
132	/*************************************************************************/
133	/* */
134	/* SLOT FUNCTIONS */
135	/* */
136	/*************************************************************************/
137
138	FT_LOCAL_DEF( void )
139	T1_GlyphSlot_Done( T1_GlyphSlot slot )
140	{
141	slot->root.internal->glyph_hints = 0;
142	}
143
144
145	FT_LOCAL_DEF( FT_Error )
146	T1_GlyphSlot_Init( T1_GlyphSlot slot )
147	{
148	T1_Face face;
149	PSHinter_Service pshinter;
150
151
152	face = (T1_Face)slot->root.face;
153	pshinter = (PSHinter_Service)face->pshinter;
154
155	if ( pshinter )
156	{
157	FT_Module module;
158
159
160	module = FT_Get_Module( slot->root.face->driver->root.library, "pshinter" );
161	if (module)
162	{
163	T1_Hints_Funcs funcs;
164
165	funcs = pshinter->get_t1_funcs( module );
166	slot->root.internal->glyph_hints = (void*)funcs;
167	}
168	}
169	return 0;
170	}
171
172
173	/*************************************************************************/
174	/* */
175	/* FACE FUNCTIONS */
176	/* */
177	/*************************************************************************/
178
179
180	/*************************************************************************/
181	/* */
182	/* <Function> */
183	/* T1_Face_Done */
184	/* */
185	/* <Description> */
186	/* The face object destructor. */
187	/* */
188	/* <Input> */
189	/* face :: A typeless pointer to the face object to destroy. */
190	/* */
191	FT_LOCAL_DEF( void )
192	T1_Face_Done( T1_Face face )
193	{
194	FT_Memory memory;
195	T1_Font type1;
196
197
198	if ( !face )
199	return;
200
201	memory = face->root.memory;
202	type1 = &face->type1;
203
204	#ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT
205	/* release multiple masters information */
206	FT_ASSERT( ( face->len_buildchar == 0 ) == ( face->buildchar == NULL ) );
207
208	if ( face->buildchar )
209	{
210	FT_FREE( face->buildchar );
211
212	face->buildchar = NULL;
213	face->len_buildchar = 0;
214	}
215
216	T1_Done_Blend( face );
217	face->blend = 0;
218	#endif
219
220	/* release font info strings */
221	{
222	PS_FontInfo info = &type1->font_info;
223
224
225	FT_FREE( info->version );
226	FT_FREE( info->notice );
227	FT_FREE( info->full_name );
228	FT_FREE( info->family_name );
229	FT_FREE( info->weight );
230	}
231
232	/* release top dictionary */
233	FT_FREE( type1->charstrings_len );
234	FT_FREE( type1->charstrings );
235	FT_FREE( type1->glyph_names );
236
237	FT_FREE( type1->subrs );
238	FT_FREE( type1->subrs_len );
239
240	FT_FREE( type1->subrs_block );
241	FT_FREE( type1->charstrings_block );
242	FT_FREE( type1->glyph_names_block );
243
244	FT_FREE( type1->encoding.char_index );
245	FT_FREE( type1->encoding.char_name );
246	FT_FREE( type1->font_name );
247
248	#ifndef T1_CONFIG_OPTION_NO_AFM
249	/* release afm data if present */
250	if ( face->afm_data )
251	T1_Done_Metrics( memory, (AFM_FontInfo)face->afm_data );
252	#endif
253
254	/* release unicode map, if any */
255	#if 0
256	FT_FREE( face->unicode_map_rec.maps );
257	face->unicode_map_rec.num_maps = 0;
258	face->unicode_map = NULL;
259	#endif
260
261	face->root.family_name = NULL;
262	face->root.style_name = NULL;
263	}
264
265
266	/*************************************************************************/
267	/* */
268	/* <Function> */
269	/* T1_Face_Init */
270	/* */
271	/* <Description> */
272	/* The face object constructor. */
273	/* */
274	/* <Input> */
275	/* stream :: input stream where to load font data. */
276	/* */
277	/* face_index :: The index of the font face in the resource. */
278	/* */
279	/* num_params :: Number of additional generic parameters. Ignored. */
280	/* */
281	/* params :: Additional generic parameters. Ignored. */
282	/* */
283	/* <InOut> */
284	/* face :: The face record to build. */
285	/* */
286	/* <Return> */
287	/* FreeType error code. 0 means success. */
288	/* */
289	FT_LOCAL_DEF( FT_Error )
290	T1_Face_Init( FT_Stream stream,
291	T1_Face face,
292	FT_Int face_index,
293	FT_Int num_params,
294	FT_Parameter* params )
295	{
296	FT_Error error;
297	FT_Service_PsCMaps psnames;
298	PSAux_Service psaux;
299	T1_Font type1 = &face->type1;
300	PS_FontInfo info = &type1->font_info;
301
302	FT_UNUSED( num_params );
303	FT_UNUSED( params );
304	FT_UNUSED( stream );
305
306
307	face->root.num_faces = 1;
308
309	FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS );
310	face->psnames = psnames;
311
312	face->psaux = FT_Get_Module_Interface( FT_FACE_LIBRARY( face ),
313	"psaux" );
314	psaux = (PSAux_Service)face->psaux;
315
316	face->pshinter = FT_Get_Module_Interface( FT_FACE_LIBRARY( face ),
317	"pshinter" );
318
319	/* open the tokenizer; this will also check the font format */
320	error = T1_Open_Face( face );
321	if ( error )
322	goto Exit;
323
324	/* if we just wanted to check the format, leave successfully now */
325	if ( face_index < 0 )
326	goto Exit;
327
328	/* check the face index */
329	if ( face_index > 0 )
330	{
331	FT_ERROR(( "T1_Face_Init: invalid face index\n" ));
332	error = T1_Err_Invalid_Argument;
333	goto Exit;
334	}
335
336	/* now load the font program into the face object */
337
338	/* initialize the face object fields */
339
340	/* set up root face fields */
341	{
342	FT_Face root = (FT_Face)&face->root;
343
344
345	root->num_glyphs = type1->num_glyphs;
346	root->face_index = 0;
347
348	root->face_flags = FT_FACE_FLAG_SCALABLE \|
349	FT_FACE_FLAG_HORIZONTAL \|
350	FT_FACE_FLAG_GLYPH_NAMES \|
351	FT_FACE_FLAG_HINTER;
352
353	if ( info->is_fixed_pitch )
354	root->face_flags \|= FT_FACE_FLAG_FIXED_WIDTH;
355
356	if ( face->blend )
357	root->face_flags \|= FT_FACE_FLAG_MULTIPLE_MASTERS;
358
359	/* XXX: TODO -- add kerning with .afm support */
360
361
362	/* The following code to extract the family and the style is very */
363	/* simplistic and might get some things wrong. For a full-featured */
364	/* algorithm you might have a look at the whitepaper given at */
365	/* */
366	/* http://blogs.msdn.com/text/archive/2007/04/23/wpf-font-selection-model.aspx */
367
368	/* get style name -- be careful, some broken fonts only */
369	/* have a `/FontName' dictionary entry! */
370	root->family_name = info->family_name;
371	root->style_name = NULL;
372
373	if ( root->family_name )
374	{
375	char* full = info->full_name;
376	char* family = root->family_name;
377
378
379	if ( full )
380	{
381	FT_Bool the_same = TRUE;
382
383
384	while ( *full )
385	{
386	if ( full == family )
387	{
388	family++;
389	full++;
390	}
391	else
392	{
393	if ( full == ' ' \|\| full == '-' )
394	full++;
395	else if ( family == ' ' \|\| family == '-' )
396	family++;
397	else
398	{
399	the_same = FALSE;
400
401	if ( !*family )
402	root->style_name = full;
403	break;
404	}
405	}
406	}
407
408	if ( the_same )
409	root->style_name = (char *)"Regular";
410	}
411	}
412	else
413	{
414	/* do we have a `/FontName'? */
415	if ( type1->font_name )
416	root->family_name = type1->font_name;
417	}
418
419	if ( !root->style_name )
420	{
421	if ( info->weight )
422	root->style_name = info->weight;
423	else
424	/* assume `Regular' style because we don't know better */
425	root->style_name = (char *)"Regular";
426	}
427
428	/* compute style flags */
429	root->style_flags = 0;
430	if ( info->italic_angle )
431	root->style_flags \|= FT_STYLE_FLAG_ITALIC;
432	if ( info->weight )
433	{
434	if ( !ft_strcmp( info->weight, "Bold" ) \|\|
435	!ft_strcmp( info->weight, "Black" ) )
436	root->style_flags \|= FT_STYLE_FLAG_BOLD;
437	}
438
439	/* no embedded bitmap support */
440	root->num_fixed_sizes = 0;
441	root->available_sizes = 0;
442
443	root->bbox.xMin = type1->font_bbox.xMin >> 16;
444	root->bbox.yMin = type1->font_bbox.yMin >> 16;
445	root->bbox.xMax = ( type1->font_bbox.xMax + 0xFFFFU ) >> 16;
446	root->bbox.yMax = ( type1->font_bbox.yMax + 0xFFFFU ) >> 16;
447
448	/* Set units_per_EM if we didn't set it in parse_font_matrix. */
449	if ( !root->units_per_EM )
450	root->units_per_EM = 1000;
451
452	root->ascender = (FT_Short)( root->bbox.yMax );
453	root->descender = (FT_Short)( root->bbox.yMin );
454
455	root->height = (FT_Short)( ( root->units_per_EM * 12 ) / 10 );
456	if ( root->height < root->ascender - root->descender )
457	root->height = (FT_Short)( root->ascender - root->descender );
458
459	/* now compute the maximum advance width */
460	root->max_advance_width =
461	(FT_Short)( root->bbox.xMax );
462	{
463	FT_Pos max_advance;
464
465
466	error = T1_Compute_Max_Advance( face, &max_advance );
467
468	/* in case of error, keep the standard width */
469	if ( !error )
470	root->max_advance_width = (FT_Short)max_advance;
471	else
472	error = T1_Err_Ok; /* clear error */
473	}
474
475	root->max_advance_height = root->height;
476
477	root->underline_position = (FT_Short)info->underline_position;
478	root->underline_thickness = (FT_Short)info->underline_thickness;
479	}
480
481	{
482	FT_Face root = &face->root;
483
484
485	if ( psnames && psaux )
486	{
487	FT_CharMapRec charmap;
488	T1_CMap_Classes cmap_classes = psaux->t1_cmap_classes;
489	FT_CMap_Class clazz;
490
491
492	charmap.face = root;
493
494	/* first of all, try to synthesize a Unicode charmap */
495	charmap.platform_id = 3;
496	charmap.encoding_id = 1;
497	charmap.encoding = FT_ENCODING_UNICODE;
498
499	FT_CMap_New( cmap_classes->unicode, NULL, &charmap, NULL );
500
501	/* now, generate an Adobe Standard encoding when appropriate */
502	charmap.platform_id = 7;
503	clazz = NULL;
504
505	switch ( type1->encoding_type )
506	{
507	case T1_ENCODING_TYPE_STANDARD:
508	charmap.encoding = FT_ENCODING_ADOBE_STANDARD;
509	charmap.encoding_id = TT_ADOBE_ID_STANDARD;
510	clazz = cmap_classes->standard;
511	break;
512
513	case T1_ENCODING_TYPE_EXPERT:
514	charmap.encoding = FT_ENCODING_ADOBE_EXPERT;
515	charmap.encoding_id = TT_ADOBE_ID_EXPERT;
516	clazz = cmap_classes->expert;
517	break;
518
519	case T1_ENCODING_TYPE_ARRAY:
520	charmap.encoding = FT_ENCODING_ADOBE_CUSTOM;
521	charmap.encoding_id = TT_ADOBE_ID_CUSTOM;
522	clazz = cmap_classes->custom;
523	break;
524
525	case T1_ENCODING_TYPE_ISOLATIN1:
526	charmap.encoding = FT_ENCODING_ADOBE_LATIN_1;
527	charmap.encoding_id = TT_ADOBE_ID_LATIN_1;
528	clazz = cmap_classes->unicode;
529	break;
530
531	default:
532	;
533	}
534
535	if ( clazz )
536	FT_CMap_New( clazz, NULL, &charmap, NULL );
537
538	#if 0
539	/* Select default charmap */
540	if (root->num_charmaps)
541	root->charmap = root->charmaps[0];
542	#endif
543	}
544	}
545
546	Exit:
547	return error;
548	}
549
550
551	/*************************************************************************/
552	/* */
553	/* <Function> */
554	/* T1_Driver_Init */
555	/* */
556	/* <Description> */
557	/* Initializes a given Type 1 driver object. */
558	/* */
559	/* <Input> */
560	/* driver :: A handle to the target driver object. */
561	/* */
562	/* <Return> */
563	/* FreeType error code. 0 means success. */
564	/* */
565	FT_LOCAL_DEF( FT_Error )
566	T1_Driver_Init( T1_Driver driver )
567	{
568	FT_UNUSED( driver );
569
570	return T1_Err_Ok;
571	}
572
573
574	/*************************************************************************/
575	/* */
576	/* <Function> */
577	/* T1_Driver_Done */
578	/* */
579	/* <Description> */
580	/* Finalizes a given Type 1 driver. */
581	/* */
582	/* <Input> */
583	/* driver :: A handle to the target Type 1 driver. */
584	/* */
585	FT_LOCAL_DEF( void )
586	T1_Driver_Done( T1_Driver driver )
587	{
588	FT_UNUSED( driver );
589	}
590
591
592	/* END */

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