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source: trunk/poppler/freetype2/src/type42/t42objs.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: 19.0 KB

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1	/***************************************************************************/
2	/* */
3	/* t42objs.c */
4	/* */
5	/* Type 42 objects manager (body). */
6	/* */
7	/* Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Roberto Alameda. */
8	/* */
9	/* This file is part of the FreeType project, and may only be used, */
10	/* modified, and distributed under the terms of the FreeType project */
11	/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
12	/* this file you indicate that you have read the license and */
13	/* understand and accept it fully. */
14	/* */
15	/***************************************************************************/
16
17
18	#include "t42objs.h"
19	#include "t42parse.h"
20	#include "t42error.h"
21	#include FT_INTERNAL_DEBUG_H
22	#include FT_INTERNAL_STREAM_H
23	#include FT_LIST_H
24
25
26	#undef FT_COMPONENT
27	#define FT_COMPONENT trace_t42
28
29
30	static FT_Error
31	T42_Open_Face( T42_Face face )
32	{
33	T42_LoaderRec loader;
34	T42_Parser parser;
35	T1_Font type1 = &face->type1;
36	FT_Memory memory = face->root.memory;
37	FT_Error error;
38
39	PSAux_Service psaux = (PSAux_Service)face->psaux;
40
41
42	t42_loader_init( &loader, face );
43
44	parser = &loader.parser;
45
46	if ( FT_ALLOC( face->ttf_data, 12 ) )
47	goto Exit;
48
49	error = t42_parser_init( parser,
50	face->root.stream,
51	memory,
52	psaux);
53	if ( error )
54	goto Exit;
55
56	error = t42_parse_dict( face, &loader,
57	parser->base_dict, parser->base_len );
58	if ( error )
59	goto Exit;
60
61	if ( type1->font_type != 42 )
62	{
63	error = T42_Err_Unknown_File_Format;
64	goto Exit;
65	}
66
67	/* now, propagate the charstrings and glyphnames tables */
68	/* to the Type1 data */
69	type1->num_glyphs = loader.num_glyphs;
70
71	if ( !loader.charstrings.init )
72	{
73	FT_ERROR(( "T42_Open_Face: no charstrings array in face!\n" ));
74	error = T42_Err_Invalid_File_Format;
75	}
76
77	loader.charstrings.init = 0;
78	type1->charstrings_block = loader.charstrings.block;
79	type1->charstrings = loader.charstrings.elements;
80	type1->charstrings_len = loader.charstrings.lengths;
81
82	/* we copy the glyph names `block' and `elements' fields; */
83	/* the `lengths' field must be released later */
84	type1->glyph_names_block = loader.glyph_names.block;
85	type1->glyph_names = (FT_String**)loader.glyph_names.elements;
86	loader.glyph_names.block = 0;
87	loader.glyph_names.elements = 0;
88
89	/* we must now build type1.encoding when we have a custom array */
90	if ( type1->encoding_type == T1_ENCODING_TYPE_ARRAY )
91	{
92	FT_Int charcode, idx, min_char, max_char;
93	FT_Byte* char_name;
94	FT_Byte* glyph_name;
95
96
97	/* OK, we do the following: for each element in the encoding */
98	/* table, look up the index of the glyph having the same name */
99	/* as defined in the CharStrings array. */
100	/* The index is then stored in type1.encoding.char_index, and */
101	/* the name in type1.encoding.char_name */
102
103	min_char = +32000;
104	max_char = -32000;
105
106	charcode = 0;
107	for ( ; charcode < loader.encoding_table.max_elems; charcode++ )
108	{
109	type1->encoding.char_index[charcode] = 0;
110	type1->encoding.char_name [charcode] = (char *)".notdef";
111
112	char_name = loader.encoding_table.elements[charcode];
113	if ( char_name )
114	for ( idx = 0; idx < type1->num_glyphs; idx++ )
115	{
116	glyph_name = (FT_Byte*)type1->glyph_names[idx];
117	if ( ft_strcmp( (const char*)char_name,
118	(const char*)glyph_name ) == 0 )
119	{
120	type1->encoding.char_index[charcode] = (FT_UShort)idx;
121	type1->encoding.char_name [charcode] = (char*)glyph_name;
122
123	/* Change min/max encoded char only if glyph name is */
124	/* not /.notdef */
125	if ( ft_strcmp( (const char*)".notdef",
126	(const char*)glyph_name ) != 0 )
127	{
128	if ( charcode < min_char )
129	min_char = charcode;
130	if ( charcode > max_char )
131	max_char = charcode;
132	}
133	break;
134	}
135	}
136	}
137	type1->encoding.code_first = min_char;
138	type1->encoding.code_last = max_char;
139	type1->encoding.num_chars = loader.num_chars;
140	}
141
142	Exit:
143	t42_loader_done( &loader );
144	return error;
145	}
146
147
148	/*************** Driver Functions ***********/
149
150
151	FT_LOCAL_DEF( FT_Error )
152	T42_Face_Init( FT_Stream stream,
153	T42_Face face,
154	FT_Int face_index,
155	FT_Int num_params,
156	FT_Parameter* params )
157	{
158	FT_Error error;
159	FT_Service_PsCMaps psnames;
160	PSAux_Service psaux;
161	FT_Face root = (FT_Face)&face->root;
162	T1_Font type1 = &face->type1;
163	PS_FontInfo info = &type1->font_info;
164
165	FT_UNUSED( num_params );
166	FT_UNUSED( params );
167	FT_UNUSED( face_index );
168	FT_UNUSED( stream );
169
170
171	face->ttf_face = NULL;
172	face->root.num_faces = 1;
173
174	FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS );
175	face->psnames = psnames;
176
177	face->psaux = FT_Get_Module_Interface( FT_FACE_LIBRARY( face ),
178	"psaux" );
179	psaux = (PSAux_Service)face->psaux;
180
181	/* open the tokenizer, this will also check the font format */
182	error = T42_Open_Face( face );
183	if ( error )
184	goto Exit;
185
186	/* if we just wanted to check the format, leave successfully now */
187	if ( face_index < 0 )
188	goto Exit;
189
190	/* check the face index */
191	if ( face_index > 0 )
192	{
193	FT_ERROR(( "T42_Face_Init: invalid face index\n" ));
194	error = T42_Err_Invalid_Argument;
195	goto Exit;
196	}
197
198	/* Now load the font program into the face object */
199
200	/* Init the face object fields */
201	/* Now set up root face fields */
202
203	root->num_glyphs = type1->num_glyphs;
204	root->num_charmaps = 0;
205	root->face_index = 0;
206
207	root->face_flags = FT_FACE_FLAG_SCALABLE \|
208	FT_FACE_FLAG_HORIZONTAL \|
209	FT_FACE_FLAG_GLYPH_NAMES;
210
211	if ( info->is_fixed_pitch )
212	root->face_flags \|= FT_FACE_FLAG_FIXED_WIDTH;
213
214	/* We only set this flag if we have the patented bytecode interpreter. */
215	/* There are no known `tricky' Type42 fonts that could be loaded with */
216	/* the unpatented interpreter. */
217	#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
218	root->face_flags \|= FT_FACE_FLAG_HINTER;
219	#endif
220
221	/* XXX: TODO -- add kerning with .afm support */
222
223	/* get style name -- be careful, some broken fonts only */
224	/* have a `/FontName' dictionary entry! */
225	root->family_name = info->family_name;
226	/* assume "Regular" style if we don't know better */
227	root->style_name = (char *)"Regular";
228	if ( root->family_name )
229	{
230	char* full = info->full_name;
231	char* family = root->family_name;
232
233
234	if ( full )
235	{
236	while ( *full )
237	{
238	if ( full == family )
239	{
240	family++;
241	full++;
242	}
243	else
244	{
245	if ( full == ' ' \|\| full == '-' )
246	full++;
247	else if ( family == ' ' \|\| family == '-' )
248	family++;
249	else
250	{
251	if ( !*family )
252	root->style_name = full;
253	break;
254	}
255	}
256	}
257	}
258	}
259	else
260	{
261	/* do we have a `/FontName'? */
262	if ( type1->font_name )
263	root->family_name = type1->font_name;
264	}
265
266	/* no embedded bitmap support */
267	root->num_fixed_sizes = 0;
268	root->available_sizes = 0;
269
270	/* Load the TTF font embedded in the T42 font */
271	{
272	FT_Open_Args args;
273
274
275	args.flags = FT_OPEN_MEMORY;
276	args.memory_base = face->ttf_data;
277	args.memory_size = face->ttf_size;
278
279	if ( num_params )
280	{
281	args.flags \|= FT_OPEN_PARAMS;
282	args.num_params = num_params;
283	args.params = params;
284	}
285
286	error = FT_Open_Face( FT_FACE_LIBRARY( face ),
287	&args, 0, &face->ttf_face );
288	}
289
290	if ( error )
291	goto Exit;
292
293	FT_Done_Size( face->ttf_face->size );
294
295	/* Ignore info in FontInfo dictionary and use the info from the */
296	/* loaded TTF font. The PostScript interpreter also ignores it. */
297	root->bbox = face->ttf_face->bbox;
298	root->units_per_EM = face->ttf_face->units_per_EM;
299
300	root->ascender = face->ttf_face->ascender;
301	root->descender = face->ttf_face->descender;
302	root->height = face->ttf_face->height;
303
304	root->max_advance_width = face->ttf_face->max_advance_width;
305	root->max_advance_height = face->ttf_face->max_advance_height;
306
307	root->underline_position = (FT_Short)info->underline_position;
308	root->underline_thickness = (FT_Short)info->underline_thickness;
309
310	/* compute style flags */
311	root->style_flags = 0;
312	if ( info->italic_angle )
313	root->style_flags \|= FT_STYLE_FLAG_ITALIC;
314
315	if ( face->ttf_face->style_flags & FT_STYLE_FLAG_BOLD )
316	root->style_flags \|= FT_STYLE_FLAG_BOLD;
317
318	if ( face->ttf_face->face_flags & FT_FACE_FLAG_VERTICAL )
319	root->face_flags \|= FT_FACE_FLAG_VERTICAL;
320
321	{
322	if ( psnames && psaux )
323	{
324	FT_CharMapRec charmap;
325	T1_CMap_Classes cmap_classes = psaux->t1_cmap_classes;
326	FT_CMap_Class clazz;
327
328
329	charmap.face = root;
330
331	/* first of all, try to synthesize a Unicode charmap */
332	charmap.platform_id = 3;
333	charmap.encoding_id = 1;
334	charmap.encoding = FT_ENCODING_UNICODE;
335
336	FT_CMap_New( cmap_classes->unicode, NULL, &charmap, NULL );
337
338	/* now, generate an Adobe Standard encoding when appropriate */
339	charmap.platform_id = 7;
340	clazz = NULL;
341
342	switch ( type1->encoding_type )
343	{
344	case T1_ENCODING_TYPE_STANDARD:
345	charmap.encoding = FT_ENCODING_ADOBE_STANDARD;
346	charmap.encoding_id = 0;
347	clazz = cmap_classes->standard;
348	break;
349
350	case T1_ENCODING_TYPE_EXPERT:
351	charmap.encoding = FT_ENCODING_ADOBE_EXPERT;
352	charmap.encoding_id = 1;
353	clazz = cmap_classes->expert;
354	break;
355
356	case T1_ENCODING_TYPE_ARRAY:
357	charmap.encoding = FT_ENCODING_ADOBE_CUSTOM;
358	charmap.encoding_id = 2;
359	clazz = cmap_classes->custom;
360	break;
361
362	case T1_ENCODING_TYPE_ISOLATIN1:
363	charmap.encoding = FT_ENCODING_ADOBE_LATIN_1;
364	charmap.encoding_id = 3;
365	clazz = cmap_classes->unicode;
366	break;
367
368	default:
369	;
370	}
371
372	if ( clazz )
373	FT_CMap_New( clazz, NULL, &charmap, NULL );
374
375	#if 0
376	/* Select default charmap */
377	if ( root->num_charmaps )
378	root->charmap = root->charmaps[0];
379	#endif
380	}
381	}
382	Exit:
383	return error;
384	}
385
386
387	FT_LOCAL_DEF( void )
388	T42_Face_Done( T42_Face face )
389	{
390	T1_Font type1;
391	PS_FontInfo info;
392	FT_Memory memory;
393
394
395	if ( !face )
396	return;
397
398	type1 = &face->type1;
399	info = &type1->font_info;
400	memory = face->root.memory;
401
402	/* delete internal ttf face prior to freeing face->ttf_data */
403	if ( face->ttf_face )
404	FT_Done_Face( face->ttf_face );
405
406	/* release font info strings */
407	FT_FREE( info->version );
408	FT_FREE( info->notice );
409	FT_FREE( info->full_name );
410	FT_FREE( info->family_name );
411	FT_FREE( info->weight );
412
413	/* release top dictionary */
414	FT_FREE( type1->charstrings_len );
415	FT_FREE( type1->charstrings );
416	FT_FREE( type1->glyph_names );
417
418	FT_FREE( type1->charstrings_block );
419	FT_FREE( type1->glyph_names_block );
420
421	FT_FREE( type1->encoding.char_index );
422	FT_FREE( type1->encoding.char_name );
423	FT_FREE( type1->font_name );
424
425	FT_FREE( face->ttf_data );
426
427	#if 0
428	/* release afm data if present */
429	if ( face->afm_data )
430	T1_Done_AFM( memory, (T1_AFM*)face->afm_data );
431	#endif
432
433	/* release unicode map, if any */
434	FT_FREE( face->unicode_map.maps );
435	face->unicode_map.num_maps = 0;
436
437	face->root.family_name = 0;
438	face->root.style_name = 0;
439	}
440
441
442	/*************************************************************************/
443	/* */
444	/* <Function> */
445	/* T42_Driver_Init */
446	/* */
447	/* <Description> */
448	/* Initializes a given Type 42 driver object. */
449	/* */
450	/* <Input> */
451	/* driver :: A handle to the target driver object. */
452	/* */
453	/* <Return> */
454	/* FreeType error code. 0 means success. */
455	/* */
456	FT_LOCAL_DEF( FT_Error )
457	T42_Driver_Init( T42_Driver driver )
458	{
459	FT_Module ttmodule;
460
461
462	ttmodule = FT_Get_Module( FT_MODULE(driver)->library, "truetype" );
463	driver->ttclazz = (FT_Driver_Class)ttmodule->clazz;
464
465	return T42_Err_Ok;
466	}
467
468
469	FT_LOCAL_DEF( void )
470	T42_Driver_Done( T42_Driver driver )
471	{
472	FT_UNUSED( driver );
473	}
474
475
476	FT_LOCAL_DEF( FT_Error )
477	T42_Size_Init( T42_Size size )
478	{
479	FT_Face face = size->root.face;
480	T42_Face t42face = (T42_Face)face;
481	FT_Size ttsize;
482	FT_Error error = T42_Err_Ok;
483
484
485	error = FT_New_Size( t42face->ttf_face, &ttsize );
486	size->ttsize = ttsize;
487
488	FT_Activate_Size( ttsize );
489
490	return error;
491	}
492
493
494	FT_LOCAL_DEF( FT_Error )
495	T42_Size_Request( T42_Size size,
496	FT_Size_Request req )
497	{
498	T42_Face face = (T42_Face)size->root.face;
499	FT_Error error;
500
501
502	FT_Activate_Size( size->ttsize );
503
504	error = FT_Request_Size( face->ttf_face, req );
505	if ( !error )
506	( (FT_Size)size )->metrics = face->ttf_face->size->metrics;
507
508	return error;
509	}
510
511
512	FT_LOCAL_DEF( FT_Error )
513	T42_Size_Select( T42_Size size,
514	FT_ULong strike_index )
515	{
516	T42_Face face = (T42_Face)size->root.face;
517	FT_Error error;
518
519
520	FT_Activate_Size( size->ttsize );
521
522	error = FT_Select_Size( face->ttf_face, (FT_Int)strike_index );
523	if ( !error )
524	( (FT_Size)size )->metrics = face->ttf_face->size->metrics;
525
526	return error;
527
528	}
529
530
531	FT_LOCAL_DEF( void )
532	T42_Size_Done( T42_Size size )
533	{
534	FT_Face face = size->root.face;
535	T42_Face t42face = (T42_Face)face;
536	FT_ListNode node;
537
538
539	node = FT_List_Find( &t42face->ttf_face->sizes_list, size->ttsize );
540	if ( node )
541	{
542	FT_Done_Size( size->ttsize );
543	size->ttsize = NULL;
544	}
545	}
546
547
548	FT_LOCAL_DEF( FT_Error )
549	T42_GlyphSlot_Init( T42_GlyphSlot slot )
550	{
551	FT_Face face = slot->root.face;
552	T42_Face t42face = (T42_Face)face;
553	FT_GlyphSlot ttslot;
554	FT_Error error = T42_Err_Ok;
555
556
557	if ( face->glyph == NULL )
558	{
559	/* First glyph slot for this face */
560	slot->ttslot = t42face->ttf_face->glyph;
561	}
562	else
563	{
564	error = FT_New_GlyphSlot( t42face->ttf_face, &ttslot );
565	slot->ttslot = ttslot;
566	}
567
568	return error;
569	}
570
571
572	FT_LOCAL_DEF( void )
573	T42_GlyphSlot_Done( T42_GlyphSlot slot )
574	{
575	FT_Done_GlyphSlot( slot->ttslot );
576	}
577
578
579	static void
580	t42_glyphslot_clear( FT_GlyphSlot slot )
581	{
582	/* free bitmap if needed */
583	ft_glyphslot_free_bitmap( slot );
584
585	/* clear all public fields in the glyph slot */
586	FT_ZERO( &slot->metrics );
587	FT_ZERO( &slot->outline );
588	FT_ZERO( &slot->bitmap );
589
590	slot->bitmap_left = 0;
591	slot->bitmap_top = 0;
592	slot->num_subglyphs = 0;
593	slot->subglyphs = 0;
594	slot->control_data = 0;
595	slot->control_len = 0;
596	slot->other = 0;
597	slot->format = FT_GLYPH_FORMAT_NONE;
598
599	slot->linearHoriAdvance = 0;
600	slot->linearVertAdvance = 0;
601	}
602
603
604	FT_LOCAL_DEF( FT_Error )
605	T42_GlyphSlot_Load( FT_GlyphSlot glyph,
606	FT_Size size,
607	FT_UInt glyph_index,
608	FT_Int32 load_flags )
609	{
610	FT_Error error;
611	T42_GlyphSlot t42slot = (T42_GlyphSlot)glyph;
612	T42_Size t42size = (T42_Size)size;
613	FT_Driver_Class ttclazz = ((T42_Driver)glyph->face->driver)->ttclazz;
614
615
616	t42_glyphslot_clear( t42slot->ttslot );
617	error = ttclazz->load_glyph( t42slot->ttslot,
618	t42size->ttsize,
619	glyph_index,
620	load_flags \| FT_LOAD_NO_BITMAP );
621
622	if ( !error )
623	{
624	glyph->metrics = t42slot->ttslot->metrics;
625
626	glyph->linearHoriAdvance = t42slot->ttslot->linearHoriAdvance;
627	glyph->linearVertAdvance = t42slot->ttslot->linearVertAdvance;
628
629	glyph->format = t42slot->ttslot->format;
630	glyph->outline = t42slot->ttslot->outline;
631
632	glyph->bitmap = t42slot->ttslot->bitmap;
633	glyph->bitmap_left = t42slot->ttslot->bitmap_left;
634	glyph->bitmap_top = t42slot->ttslot->bitmap_top;
635
636	glyph->num_subglyphs = t42slot->ttslot->num_subglyphs;
637	glyph->subglyphs = t42slot->ttslot->subglyphs;
638
639	glyph->control_data = t42slot->ttslot->control_data;
640	glyph->control_len = t42slot->ttslot->control_len;
641	}
642
643	return error;
644	}
645
646
647	/* END */

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