Context Navigation

source: trunk/poppler/freetype2/include/freetype/internal/ftdriver.h @ 251

Last change on this file since 251 was 251, checked in by Eugene Romanenko, 13 years ago
PDF plugin: freetype library updated to version 2.3.5
File size: 10.8 KB

Line
1	/***************************************************************************/
2	/* */
3	/* ftdriver.h */
4	/* */
5	/* FreeType font driver interface (specification). */
6	/* */
7	/* Copyright 1996-2001, 2002, 2003, 2006, 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 __FTDRIVER_H__
20	#define __FTDRIVER_H__
21
22
23	#include <ft2build.h>
24	#include FT_MODULE_H
25
26
27	FT_BEGIN_HEADER
28
29
30	typedef FT_Error
31	(*FT_Face_InitFunc)( FT_Stream stream,
32	FT_Face face,
33	FT_Int typeface_index,
34	FT_Int num_params,
35	FT_Parameter* parameters );
36
37	typedef void
38	(*FT_Face_DoneFunc)( FT_Face face );
39
40
41	typedef FT_Error
42	(*FT_Size_InitFunc)( FT_Size size );
43
44	typedef void
45	(*FT_Size_DoneFunc)( FT_Size size );
46
47
48	typedef FT_Error
49	(*FT_Slot_InitFunc)( FT_GlyphSlot slot );
50
51	typedef void
52	(*FT_Slot_DoneFunc)( FT_GlyphSlot slot );
53
54
55	typedef FT_Error
56	(*FT_Size_RequestFunc)( FT_Size size,
57	FT_Size_Request req );
58
59	typedef FT_Error
60	(*FT_Size_SelectFunc)( FT_Size size,
61	FT_ULong size_index );
62
63	#ifdef FT_CONFIG_OPTION_OLD_INTERNALS
64
65	typedef FT_Error
66	(*FT_Size_ResetPointsFunc)( FT_Size size,
67	FT_F26Dot6 char_width,
68	FT_F26Dot6 char_height,
69	FT_UInt horz_resolution,
70	FT_UInt vert_resolution );
71
72	typedef FT_Error
73	(*FT_Size_ResetPixelsFunc)( FT_Size size,
74	FT_UInt pixel_width,
75	FT_UInt pixel_height );
76
77	#endif /* FT_CONFIG_OPTION_OLD_INTERNALS */
78
79	typedef FT_Error
80	(*FT_Slot_LoadFunc)( FT_GlyphSlot slot,
81	FT_Size size,
82	FT_UInt glyph_index,
83	FT_Int32 load_flags );
84
85
86	typedef FT_UInt
87	(*FT_CharMap_CharIndexFunc)( FT_CharMap charmap,
88	FT_Long charcode );
89
90	typedef FT_Long
91	(*FT_CharMap_CharNextFunc)( FT_CharMap charmap,
92	FT_Long charcode );
93
94	typedef FT_Error
95	(*FT_Face_GetKerningFunc)( FT_Face face,
96	FT_UInt left_glyph,
97	FT_UInt right_glyph,
98	FT_Vector* kerning );
99
100
101	typedef FT_Error
102	(*FT_Face_AttachFunc)( FT_Face face,
103	FT_Stream stream );
104
105
106	typedef FT_Error
107	(*FT_Face_GetAdvancesFunc)( FT_Face face,
108	FT_UInt first,
109	FT_UInt count,
110	FT_Bool vertical,
111	FT_UShort* advances );
112
113
114	/*************************************************************************/
115	/* */
116	/* <Struct> */
117	/* FT_Driver_ClassRec */
118	/* */
119	/* <Description> */
120	/* The font driver class. This structure mostly contains pointers to */
121	/* driver methods. */
122	/* */
123	/* <Fields> */
124	/* root :: The parent module. */
125	/* */
126	/* face_object_size :: The size of a face object in bytes. */
127	/* */
128	/* size_object_size :: The size of a size object in bytes. */
129	/* */
130	/* slot_object_size :: The size of a glyph object in bytes. */
131	/* */
132	/* init_face :: The format-specific face constructor. */
133	/* */
134	/* done_face :: The format-specific face destructor. */
135	/* */
136	/* init_size :: The format-specific size constructor. */
137	/* */
138	/* done_size :: The format-specific size destructor. */
139	/* */
140	/* init_slot :: The format-specific slot constructor. */
141	/* */
142	/* done_slot :: The format-specific slot destructor. */
143	/* */
144	/* */
145	/* load_glyph :: A function handle to load a glyph to a slot. */
146	/* This field is mandatory! */
147	/* */
148	/* get_kerning :: A function handle to return the unscaled */
149	/* kerning for a given pair of glyphs. Can be */
150	/* set to 0 if the format doesn't support */
151	/* kerning. */
152	/* */
153	/* attach_file :: This function handle is used to read */
154	/* additional data for a face from another */
155	/* file/stream. For example, this can be used to */
156	/* add data from AFM or PFM files on a Type 1 */
157	/* face, or a CIDMap on a CID-keyed face. */
158	/* */
159	/* get_advances :: A function handle used to return advance */
160	/* widths of `count' glyphs (in font units), */
161	/* starting at `first'. The `vertical' flag must */
162	/* be set to get vertical advance heights. The */
163	/* `advances' buffer is caller-allocated. */
164	/* Currently not implemented. The idea of this */
165	/* function is to be able to perform */
166	/* device-independent text layout without loading */
167	/* a single glyph image. */
168	/* */
169	/* request_size :: A handle to a function used to request the new */
170	/* character size. Can be set to 0 if the */
171	/* scaling done in the base layer suffices. */
172	/* */
173	/* select_size :: A handle to a function used to select a new */
174	/* fixed size. It is used only if */
175	/* @FT_FACE_FLAG_FIXED_SIZES is set. Can be set */
176	/* to 0 if the scaling done in the base layer */
177	/* suffices. */
178	/* <Note> */
179	/* Most function pointers, with the exception of `load_glyph', can be */
180	/* set to 0 to indicate a default behaviour. */
181	/* */
182	typedef struct FT_Driver_ClassRec_
183	{
184	FT_Module_Class root;
185
186	FT_Long face_object_size;
187	FT_Long size_object_size;
188	FT_Long slot_object_size;
189
190	FT_Face_InitFunc init_face;
191	FT_Face_DoneFunc done_face;
192
193	FT_Size_InitFunc init_size;
194	FT_Size_DoneFunc done_size;
195
196	FT_Slot_InitFunc init_slot;
197	FT_Slot_DoneFunc done_slot;
198
199	#ifdef FT_CONFIG_OPTION_OLD_INTERNALS
200
201	FT_Size_ResetPointsFunc set_char_sizes;
202	FT_Size_ResetPixelsFunc set_pixel_sizes;
203
204	#endif /* FT_CONFIG_OPTION_OLD_INTERNALS */
205
206	FT_Slot_LoadFunc load_glyph;
207
208	FT_Face_GetKerningFunc get_kerning;
209	FT_Face_AttachFunc attach_file;
210	FT_Face_GetAdvancesFunc get_advances;
211
212	/* since version 2.2 */
213	FT_Size_RequestFunc request_size;
214	FT_Size_SelectFunc select_size;
215
216	} FT_Driver_ClassRec, *FT_Driver_Class;
217
218
219	/*
220	* The following functions are used as stubs for `set_char_sizes' and
221	* `set_pixel_sizes'; the code uses `request_size' and `select_size'
222	* functions instead.
223	*
224	* Implementation is in `src/base/ftobjs.c'.
225	*/
226	#ifdef FT_CONFIG_OPTION_OLD_INTERNALS
227
228	FT_BASE( FT_Error )
229	ft_stub_set_char_sizes( FT_Size size,
230	FT_F26Dot6 width,
231	FT_F26Dot6 height,
232	FT_UInt horz_res,
233	FT_UInt vert_res );
234
235	FT_BASE( FT_Error )
236	ft_stub_set_pixel_sizes( FT_Size size,
237	FT_UInt width,
238	FT_UInt height );
239
240	#endif /* FT_CONFIG_OPTION_OLD_INTERNALS */
241
242
243	FT_END_HEADER
244
245	#endif /* __FTDRIVER_H__ */
246
247
248	/* END */

Note: See TracBrowser for help on using the repository browser.

Download in other formats: