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source: trunk/poppler/freetype2/src/cff/cffgload.h @ 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: 8.2 KB

Line
1	/***************************************************************************/
2	/* */
3	/* cffgload.h */
4	/* */
5	/* OpenType Glyph Loader (specification). */
6	/* */
7	/* Copyright 1996-2001, 2002, 2003, 2004, 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	#ifndef __CFFGLOAD_H__
20	#define __CFFGLOAD_H__
21
22
23	#include <ft2build.h>
24	#include FT_FREETYPE_H
25	#include "cffobjs.h"
26
27
28	FT_BEGIN_HEADER
29
30
31	#define CFF_MAX_OPERANDS 48
32	#define CFF_MAX_SUBRS_CALLS 32
33
34
35	/*************************************************************************/
36	/* */
37	/* <Structure> */
38	/* CFF_Builder */
39	/* */
40	/* <Description> */
41	/* A structure used during glyph loading to store its outline. */
42	/* */
43	/* <Fields> */
44	/* memory :: The current memory object. */
45	/* */
46	/* face :: The current face object. */
47	/* */
48	/* glyph :: The current glyph slot. */
49	/* */
50	/* loader :: The current glyph loader. */
51	/* */
52	/* base :: The base glyph outline. */
53	/* */
54	/* current :: The current glyph outline. */
55	/* */
56	/* last :: The last point position. */
57	/* */
58	/* pos_x :: The horizontal translation (if composite glyph). */
59	/* */
60	/* pos_y :: The vertical translation (if composite glyph). */
61	/* */
62	/* left_bearing :: The left side bearing point. */
63	/* */
64	/* advance :: The horizontal advance vector. */
65	/* */
66	/* bbox :: Unused. */
67	/* */
68	/* path_begun :: A flag which indicates that a new path has begun. */
69	/* */
70	/* load_points :: If this flag is not set, no points are loaded. */
71	/* */
72	/* no_recurse :: Set but not used. */
73	/* */
74	/* metrics_only :: A boolean indicating that we only want to compute */
75	/* the metrics of a given glyph, not load all of its */
76	/* points. */
77	/* */
78	/* hints_funcs :: Auxiliary pointer for hinting. */
79	/* */
80	/* hints_globals :: Auxiliary pointer for hinting. */
81	/* */
82	typedef struct CFF_Builder_
83	{
84	FT_Memory memory;
85	TT_Face face;
86	CFF_GlyphSlot glyph;
87	FT_GlyphLoader loader;
88	FT_Outline* base;
89	FT_Outline* current;
90
91	FT_Vector last;
92
93	FT_Pos pos_x;
94	FT_Pos pos_y;
95
96	FT_Vector left_bearing;
97	FT_Vector advance;
98
99	FT_BBox bbox; /* bounding box */
100	FT_Bool path_begun;
101	FT_Bool load_points;
102	FT_Bool no_recurse;
103
104	FT_Bool metrics_only;
105
106	void* hints_funcs; /* hinter-specific */
107	void* hints_globals; /* hinter-specific */
108
109	} CFF_Builder;
110
111
112	/* execution context charstring zone */
113
114	typedef struct CFF_Decoder_Zone_
115	{
116	FT_Byte* base;
117	FT_Byte* limit;
118	FT_Byte* cursor;
119
120	} CFF_Decoder_Zone;
121
122
123	typedef struct CFF_Decoder_
124	{
125	CFF_Builder builder;
126	CFF_Font cff;
127
128	FT_Fixed stack[CFF_MAX_OPERANDS + 1];
129	FT_Fixed* top;
130
131	CFF_Decoder_Zone zones[CFF_MAX_SUBRS_CALLS + 1];
132	CFF_Decoder_Zone* zone;
133
134	FT_Int flex_state;
135	FT_Int num_flex_vectors;
136	FT_Vector flex_vectors[7];
137
138	FT_Pos glyph_width;
139	FT_Pos nominal_width;
140
141	FT_Bool read_width;
142	FT_Bool width_only;
143	FT_Int num_hints;
144	FT_Fixed* buildchar;
145	FT_Int len_buildchar;
146
147	FT_UInt num_locals;
148	FT_UInt num_globals;
149
150	FT_Int locals_bias;
151	FT_Int globals_bias;
152
153	FT_Byte** locals;
154	FT_Byte** globals;
155
156	FT_Byte** glyph_names; /* for pure CFF fonts only */
157	FT_UInt num_glyphs; /* number of glyphs in font */
158
159	FT_Render_Mode hint_mode;
160
161	} CFF_Decoder;
162
163
164	FT_LOCAL( void )
165	cff_decoder_init( CFF_Decoder* decoder,
166	TT_Face face,
167	CFF_Size size,
168	CFF_GlyphSlot slot,
169	FT_Bool hinting,
170	FT_Render_Mode hint_mode );
171
172	FT_LOCAL( FT_Error )
173	cff_decoder_prepare( CFF_Decoder* decoder,
174	CFF_Size size,
175	FT_UInt glyph_index );
176
177	#if 0 /* unused until we support pure CFF fonts */
178
179	/* Compute the maximum advance width of a font through quick parsing */
180	FT_LOCAL( FT_Error )
181	cff_compute_max_advance( TT_Face face,
182	FT_Int* max_advance );
183
184	#endif /* 0 */
185
186	FT_LOCAL( FT_Error )
187	cff_decoder_parse_charstrings( CFF_Decoder* decoder,
188	FT_Byte* charstring_base,
189	FT_ULong charstring_len );
190
191	FT_LOCAL( FT_Error )
192	cff_slot_load( CFF_GlyphSlot glyph,
193	CFF_Size size,
194	FT_UInt glyph_index,
195	FT_Int32 load_flags );
196
197
198	FT_END_HEADER
199
200	#endif /* __CFFGLOAD_H__ */
201
202
203	/* END */

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