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ttpost.c

Last change on this file was 2, checked in by jglee, 11 years ago
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File size: 15.2 KB

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1	/***************************************************************************/
2	/* */
3	/* ttpost.c */
4	/* */
5	/* Postcript name table processing for TrueType and OpenType fonts */
6	/* (body). */
7	/* */
8	/* Copyright 1996-2001, 2002, 2003, 2006, 2007, 2008 by */
9	/* David Turner, Robert Wilhelm, and Werner Lemberg. */
10	/* */
11	/* This file is part of the FreeType project, and may only be used, */
12	/* modified, and distributed under the terms of the FreeType project */
13	/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
14	/* this file you indicate that you have read the license and */
15	/* understand and accept it fully. */
16	/* */
17	/***************************************************************************/
18
19	/*************************************************************************/
20	/* */
21	/* The post table is not completely loaded by the core engine. This */
22	/* file loads the missing PS glyph names and implements an API to access */
23	/* them. */
24	/* */
25	/*************************************************************************/
26
27
28	#include <ft2build.h>
29	#include FT_INTERNAL_STREAM_H
30	#include FT_TRUETYPE_TAGS_H
31	#include "ttpost.h"
32	#include "ttload.h"
33
34	#include "sferrors.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_ttpost
45
46
47	/* If this configuration macro is defined, we rely on the `PSNames' */
48	/* module to grab the glyph names. */
49
50	#ifdef FT_CONFIG_OPTION_POSTSCRIPT_NAMES
51
52
53	#include FT_SERVICE_POSTSCRIPT_CMAPS_H
54
55	#define MAC_NAME( x ) ( (FT_String*)psnames->macintosh_name( x ) )
56
57
58	#else /* FT_CONFIG_OPTION_POSTSCRIPT_NAMES */
59
60
61	/* Otherwise, we ignore the `PSNames' module, and provide our own */
62	/* table of Mac names. Thus, it is possible to build a version of */
63	/* FreeType without the Type 1 driver & PSNames module. */
64
65	#define MAC_NAME( x ) ( (FT_String*)tt_post_default_names[x] )
66
67	/* the 258 default Mac PS glyph names */
68
69	static const FT_String* const tt_post_default_names[258] =
70	{
71	/* 0 */
72	".notdef", ".null", "CR", "space", "exclam",
73	"quotedbl", "numbersign", "dollar", "percent", "ampersand",
74	/* 10 */
75	"quotesingle", "parenleft", "parenright", "asterisk", "plus",
76	"comma", "hyphen", "period", "slash", "zero",
77	/* 20 */
78	"one", "two", "three", "four", "five",
79	"six", "seven", "eight", "nine", "colon",
80	/* 30 */
81	"semicolon", "less", "equal", "greater", "question",
82	"at", "A", "B", "C", "D",
83	/* 40 */
84	"E", "F", "G", "H", "I",
85	"J", "K", "L", "M", "N",
86	/* 50 */
87	"O", "P", "Q", "R", "S",
88	"T", "U", "V", "W", "X",
89	/* 60 */
90	"Y", "Z", "bracketleft", "backslash", "bracketright",
91	"asciicircum", "underscore", "grave", "a", "b",
92	/* 70 */
93	"c", "d", "e", "f", "g",
94	"h", "i", "j", "k", "l",
95	/* 80 */
96	"m", "n", "o", "p", "q",
97	"r", "s", "t", "u", "v",
98	/* 90 */
99	"w", "x", "y", "z", "braceleft",
100	"bar", "braceright", "asciitilde", "Adieresis", "Aring",
101	/* 100 */
102	"Ccedilla", "Eacute", "Ntilde", "Odieresis", "Udieresis",
103	"aacute", "agrave", "acircumflex", "adieresis", "atilde",
104	/* 110 */
105	"aring", "ccedilla", "eacute", "egrave", "ecircumflex",
106	"edieresis", "iacute", "igrave", "icircumflex", "idieresis",
107	/* 120 */
108	"ntilde", "oacute", "ograve", "ocircumflex", "odieresis",
109	"otilde", "uacute", "ugrave", "ucircumflex", "udieresis",
110	/* 130 */
111	"dagger", "degree", "cent", "sterling", "section",
112	"bullet", "paragraph", "germandbls", "registered", "copyright",
113	/* 140 */
114	"trademark", "acute", "dieresis", "notequal", "AE",
115	"Oslash", "infinity", "plusminus", "lessequal", "greaterequal",
116	/* 150 */
117	"yen", "mu", "partialdiff", "summation", "product",
118	"pi", "integral", "ordfeminine", "ordmasculine", "Omega",
119	/* 160 */
120	"ae", "oslash", "questiondown", "exclamdown", "logicalnot",
121	"radical", "florin", "approxequal", "Delta", "guillemotleft",
122	/* 170 */
123	"guillemotright", "ellipsis", "nbspace", "Agrave", "Atilde",
124	"Otilde", "OE", "oe", "endash", "emdash",
125	/* 180 */
126	"quotedblleft", "quotedblright", "quoteleft", "quoteright", "divide",
127	"lozenge", "ydieresis", "Ydieresis", "fraction", "currency",
128	/* 190 */
129	"guilsinglleft", "guilsinglright", "fi", "fl", "daggerdbl",
130	"periodcentered", "quotesinglbase", "quotedblbase", "perthousand", "Acircumflex",
131	/* 200 */
132	"Ecircumflex", "Aacute", "Edieresis", "Egrave", "Iacute",
133	"Icircumflex", "Idieresis", "Igrave", "Oacute", "Ocircumflex",
134	/* 210 */
135	"apple", "Ograve", "Uacute", "Ucircumflex", "Ugrave",
136	"dotlessi", "circumflex", "tilde", "macron", "breve",
137	/* 220 */
138	"dotaccent", "ring", "cedilla", "hungarumlaut", "ogonek",
139	"caron", "Lslash", "lslash", "Scaron", "scaron",
140	/* 230 */
141	"Zcaron", "zcaron", "brokenbar", "Eth", "eth",
142	"Yacute", "yacute", "Thorn", "thorn", "minus",
143	/* 240 */
144	"multiply", "onesuperior", "twosuperior", "threesuperior", "onehalf",
145	"onequarter", "threequarters", "franc", "Gbreve", "gbreve",
146	/* 250 */
147	"Idot", "Scedilla", "scedilla", "Cacute", "cacute",
148	"Ccaron", "ccaron", "dmacron",
149	};
150
151
152	#endif /* FT_CONFIG_OPTION_POSTSCRIPT_NAMES */
153
154
155	static FT_Error
156	load_format_20( TT_Face face,
157	FT_Stream stream )
158	{
159	FT_Memory memory = stream->memory;
160	FT_Error error;
161
162	FT_Int num_glyphs;
163	FT_UShort num_names;
164
165	FT_UShort* glyph_indices = 0;
166	FT_Char** name_strings = 0;
167
168
169	if ( FT_READ_USHORT( num_glyphs ) )
170	goto Exit;
171
172	/* UNDOCUMENTED! The number of glyphs in this table can be smaller */
173	/* than the value in the maxp table (cf. cyberbit.ttf). */
174
175	/* There already exist fonts which have more than 32768 glyph names */
176	/* in this table, so the test for this threshold has been dropped. */
177
178	if ( num_glyphs > face->max_profile.numGlyphs )
179	{
180	error = SFNT_Err_Invalid_File_Format;
181	goto Exit;
182	}
183
184	/* load the indices */
185	{
186	FT_Int n;
187
188
189	if ( FT_NEW_ARRAY ( glyph_indices, num_glyphs ) \|\|
190	FT_FRAME_ENTER( num_glyphs * 2L ) )
191	goto Fail;
192
193	for ( n = 0; n < num_glyphs; n++ )
194	glyph_indices[n] = FT_GET_USHORT();
195
196	FT_FRAME_EXIT();
197	}
198
199	/* compute number of names stored in table */
200	{
201	FT_Int n;
202
203
204	num_names = 0;
205
206	for ( n = 0; n < num_glyphs; n++ )
207	{
208	FT_Int idx;
209
210
211	idx = glyph_indices[n];
212	if ( idx >= 258 )
213	{
214	idx -= 257;
215	if ( idx > num_names )
216	num_names = (FT_UShort)idx;
217	}
218	}
219	}
220
221	/* now load the name strings */
222	{
223	FT_UShort n;
224
225
226	if ( FT_NEW_ARRAY( name_strings, num_names ) )
227	goto Fail;
228
229	for ( n = 0; n < num_names; n++ )
230	{
231	FT_UInt len;
232
233
234	if ( FT_READ_BYTE ( len ) \|\|
235	FT_NEW_ARRAY( name_strings[n], len + 1 ) \|\|
236	FT_STREAM_READ ( name_strings[n], len ) )
237	goto Fail1;
238
239	name_strings[n][len] = '\0';
240	}
241	}
242
243	/* all right, set table fields and exit successfully */
244	{
245	TT_Post_20 table = &face->postscript_names.names.format_20;
246
247
248	table->num_glyphs = (FT_UShort)num_glyphs;
249	table->num_names = (FT_UShort)num_names;
250	table->glyph_indices = glyph_indices;
251	table->glyph_names = name_strings;
252	}
253	return SFNT_Err_Ok;
254
255	Fail1:
256	{
257	FT_UShort n;
258
259
260	for ( n = 0; n < num_names; n++ )
261	FT_FREE( name_strings[n] );
262	}
263
264	Fail:
265	FT_FREE( name_strings );
266	FT_FREE( glyph_indices );
267
268	Exit:
269	return error;
270	}
271
272
273	static FT_Error
274	load_format_25( TT_Face face,
275	FT_Stream stream )
276	{
277	FT_Memory memory = stream->memory;
278	FT_Error error;
279
280	FT_Int num_glyphs;
281	FT_Char* offset_table = 0;
282
283
284	/* UNDOCUMENTED! This value appears only in the Apple TT specs. */
285	if ( FT_READ_USHORT( num_glyphs ) )
286	goto Exit;
287
288	/* check the number of glyphs */
289	if ( num_glyphs > face->max_profile.numGlyphs \|\| num_glyphs > 258 )
290	{
291	error = SFNT_Err_Invalid_File_Format;
292	goto Exit;
293	}
294
295	if ( FT_NEW_ARRAY( offset_table, num_glyphs ) \|\|
296	FT_STREAM_READ( offset_table, num_glyphs ) )
297	goto Fail;
298
299	/* now check the offset table */
300	{
301	FT_Int n;
302
303
304	for ( n = 0; n < num_glyphs; n++ )
305	{
306	FT_Long idx = (FT_Long)n + offset_table[n];
307
308
309	if ( idx < 0 \|\| idx > num_glyphs )
310	{
311	error = SFNT_Err_Invalid_File_Format;
312	goto Fail;
313	}
314	}
315	}
316
317	/* OK, set table fields and exit successfully */
318	{
319	TT_Post_25 table = &face->postscript_names.names.format_25;
320
321
322	table->num_glyphs = (FT_UShort)num_glyphs;
323	table->offsets = offset_table;
324	}
325
326	return SFNT_Err_Ok;
327
328	Fail:
329	FT_FREE( offset_table );
330
331	Exit:
332	return error;
333	}
334
335
336	static FT_Error
337	load_post_names( TT_Face face )
338	{
339	FT_Stream stream;
340	FT_Error error;
341	FT_Fixed format;
342
343
344	/* get a stream for the face's resource */
345	stream = face->root.stream;
346
347	/* seek to the beginning of the PS names table */
348	error = face->goto_table( face, TTAG_post, stream, 0 );
349	if ( error )
350	goto Exit;
351
352	format = face->postscript.FormatType;
353
354	/* go to beginning of subtable */
355	if ( FT_STREAM_SKIP( 32 ) )
356	goto Exit;
357
358	/* now read postscript table */
359	if ( format == 0x00020000L )
360	error = load_format_20( face, stream );
361	else if ( format == 0x00028000L )
362	error = load_format_25( face, stream );
363	else
364	error = SFNT_Err_Invalid_File_Format;
365
366	face->postscript_names.loaded = 1;
367
368	Exit:
369	return error;
370	}
371
372
373	FT_LOCAL_DEF( void )
374	tt_face_free_ps_names( TT_Face face )
375	{
376	FT_Memory memory = face->root.memory;
377	TT_Post_Names names = &face->postscript_names;
378	FT_Fixed format;
379
380
381	if ( names->loaded )
382	{
383	format = face->postscript.FormatType;
384
385	if ( format == 0x00020000L )
386	{
387	TT_Post_20 table = &names->names.format_20;
388	FT_UShort n;
389
390
391	FT_FREE( table->glyph_indices );
392	table->num_glyphs = 0;
393
394	for ( n = 0; n < table->num_names; n++ )
395	FT_FREE( table->glyph_names[n] );
396
397	FT_FREE( table->glyph_names );
398	table->num_names = 0;
399	}
400	else if ( format == 0x00028000L )
401	{
402	TT_Post_25 table = &names->names.format_25;
403
404
405	FT_FREE( table->offsets );
406	table->num_glyphs = 0;
407	}
408	}
409	names->loaded = 0;
410	}
411
412
413	/*************************************************************************/
414	/* */
415	/* <Function> */
416	/* tt_face_get_ps_name */
417	/* */
418	/* <Description> */
419	/* Get the PostScript glyph name of a glyph. */
420	/* */
421	/* <Input> */
422	/* face :: A handle to the parent face. */
423	/* */
424	/* idx :: The glyph index. */
425	/* */
426	/* <InOut> */
427	/* PSname :: The address of a string pointer. Will be NULL in case */
428	/* of error, otherwise it is a pointer to the glyph name. */
429	/* */
430	/* You must not modify the returned string! */
431	/* */
432	/* <Output> */
433	/* FreeType error code. 0 means success. */
434	/* */
435	FT_LOCAL_DEF( FT_Error )
436	tt_face_get_ps_name( TT_Face face,
437	FT_UInt idx,
438	FT_String** PSname )
439	{
440	FT_Error error;
441	TT_Post_Names names;
442	FT_Fixed format;
443
444	#ifdef FT_CONFIG_OPTION_POSTSCRIPT_NAMES
445	FT_Service_PsCMaps psnames;
446	#endif
447
448
449	if ( !face )
450	return SFNT_Err_Invalid_Face_Handle;
451
452	if ( idx >= (FT_UInt)face->max_profile.numGlyphs )
453	return SFNT_Err_Invalid_Glyph_Index;
454
455	#ifdef FT_CONFIG_OPTION_POSTSCRIPT_NAMES
456	psnames = (FT_Service_PsCMaps)face->psnames;
457	if ( !psnames )
458	return SFNT_Err_Unimplemented_Feature;
459	#endif
460
461	names = &face->postscript_names;
462
463	/* `.notdef' by default */
464	*PSname = MAC_NAME( 0 );
465
466	format = face->postscript.FormatType;
467
468	if ( format == 0x00010000L )
469	{
470	if ( idx < 258 ) /* paranoid checking */
471	*PSname = MAC_NAME( idx );
472	}
473	else if ( format == 0x00020000L )
474	{
475	TT_Post_20 table = &names->names.format_20;
476
477
478	if ( !names->loaded )
479	{
480	error = load_post_names( face );
481	if ( error )
482	goto End;
483	}
484
485	if ( idx < (FT_UInt)table->num_glyphs )
486	{
487	FT_UShort name_index = table->glyph_indices[idx];
488
489
490	if ( name_index < 258 )
491	*PSname = MAC_NAME( name_index );
492	else
493	PSname = (FT_String)table->glyph_names[name_index - 258];
494	}
495	}
496	else if ( format == 0x00028000L )
497	{
498	TT_Post_25 table = &names->names.format_25;
499
500
501	if ( !names->loaded )
502	{
503	error = load_post_names( face );
504	if ( error )
505	goto End;
506	}
507
508	if ( idx < (FT_UInt)table->num_glyphs ) /* paranoid checking */
509	{
510	idx += table->offsets[idx];
511	*PSname = MAC_NAME( idx );
512	}
513	}
514
515	/* nothing to do for format == 0x00030000L */
516
517	End:
518	return SFNT_Err_Ok;
519	}
520
521
522	/* END */

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source: svn/trunk/zasc/freetype-2.3.9/ttpost.c

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