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source: trunk/poppler/freetype2/include/freetype/ftbitmap.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: 12.5 KB

Line
1	/***************************************************************************/
2	/* */
3	/* ftbitmap.h */
4	/* */
5	/* FreeType utility functions for converting 1bpp, 2bpp, 4bpp, and 8bpp */
6	/* bitmaps into 8bpp format (specification). */
7	/* */
8	/* Copyright 2004, 2005, 2006 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	#ifndef __FTBITMAP_H__
21	#define __FTBITMAP_H__
22
23
24	#include <ft2build.h>
25	#include FT_FREETYPE_H
26
27	#ifdef FREETYPE_H
28	#error "freetype.h of FreeType 1 has been loaded!"
29	#error "Please fix the directory search order for header files"
30	#error "so that freetype.h of FreeType 2 is found first."
31	#endif
32
33
34	FT_BEGIN_HEADER
35
36
37	/*************************************************************************/
38	/* */
39	/* <Section> */
40	/* bitmap_handling */
41	/* */
42	/* <Title> */
43	/* Bitmap Handling */
44	/* */
45	/* <Abstract> */
46	/* Handling FT_Bitmap objects. */
47	/* */
48	/* <Description> */
49	/* This section contains functions for converting FT_Bitmap objects. */
50	/* */
51	/*************************************************************************/
52
53
54	/*************************************************************************/
55	/* */
56	/* <Function> */
57	/* FT_Bitmap_New */
58	/* */
59	/* <Description> */
60	/* Initialize a pointer to an @FT_Bitmap structure. */
61	/* */
62	/* <InOut> */
63	/* abitmap :: A pointer to the bitmap structure. */
64	/* */
65	FT_EXPORT( void )
66	FT_Bitmap_New( FT_Bitmap *abitmap );
67
68
69	/*************************************************************************/
70	/* */
71	/* <Function> */
72	/* FT_Bitmap_Copy */
73	/* */
74	/* <Description> */
75	/* Copy a bitmap into another one. */
76	/* */
77	/* <Input> */
78	/* library :: A handle to a library object. */
79	/* */
80	/* source :: A handle to the source bitmap. */
81	/* */
82	/* <Output> */
83	/* target :: A handle to the target bitmap. */
84	/* */
85	/* <Return> */
86	/* FreeType error code. 0~means success. */
87	/* */
88	FT_EXPORT( FT_Error )
89	FT_Bitmap_Copy( FT_Library library,
90	const FT_Bitmap *source,
91	FT_Bitmap *target);
92
93
94	/*************************************************************************/
95	/* */
96	/* <Function> */
97	/* FT_Bitmap_Embolden */
98	/* */
99	/* <Description> */
100	/* Embolden a bitmap. The new bitmap will be about `xStrength' */
101	/* pixels wider and `yStrength' pixels higher. The left and bottom */
102	/* borders are kept unchanged. */
103	/* */
104	/* <Input> */
105	/* library :: A handle to a library object. */
106	/* */
107	/* xStrength :: How strong the glyph is emboldened horizontally. */
108	/* Expressed in 26.6 pixel format. */
109	/* */
110	/* yStrength :: How strong the glyph is emboldened vertically. */
111	/* Expressed in 26.6 pixel format. */
112	/* */
113	/* <InOut> */
114	/* bitmap :: A handle to the target bitmap. */
115	/* */
116	/* <Return> */
117	/* FreeType error code. 0~means success. */
118	/* */
119	/* <Note> */
120	/* The current implementation restricts `xStrength' to be less than */
121	/* or equal to~8 if bitmap is of pixel_mode @FT_PIXEL_MODE_MONO. */
122	/* */
123	/* If you want to embolden the bitmap owned by a @FT_GlyphSlotRec, */
124	/* you should call `FT_GlyphSlot_Own_Bitmap' on the slot first. */
125	/* */
126	FT_EXPORT( FT_Error )
127	FT_Bitmap_Embolden( FT_Library library,
128	FT_Bitmap* bitmap,
129	FT_Pos xStrength,
130	FT_Pos yStrength );
131
132
133	/*************************************************************************/
134	/* */
135	/* <Function> */
136	/* FT_Bitmap_Convert */
137	/* */
138	/* <Description> */
139	/* Convert a bitmap object with depth 1bpp, 2bpp, 4bpp, or 8bpp to a */
140	/* bitmap object with depth 8bpp, making the number of used bytes per */
141	/* line (a.k.a. the `pitch') a multiple of `alignment'. */
142	/* */
143	/* <Input> */
144	/* library :: A handle to a library object. */
145	/* */
146	/* source :: The source bitmap. */
147	/* */
148	/* alignment :: The pitch of the bitmap is a multiple of this */
149	/* parameter. Common values are 1, 2, or 4. */
150	/* */
151	/* <Output> */
152	/* target :: The target bitmap. */
153	/* */
154	/* <Return> */
155	/* FreeType error code. 0~means success. */
156	/* */
157	/* <Note> */
158	/* It is possible to call @FT_Bitmap_Convert multiple times without */
159	/* calling @FT_Bitmap_Done (the memory is simply reallocated). */
160	/* */
161	/* Use @FT_Bitmap_Done to finally remove the bitmap object. */
162	/* */
163	/* The `library' argument is taken to have access to FreeType's */
164	/* memory handling functions. */
165	/* */
166	FT_EXPORT( FT_Error )
167	FT_Bitmap_Convert( FT_Library library,
168	const FT_Bitmap *source,
169	FT_Bitmap *target,
170	FT_Int alignment );
171
172
173	/*************************************************************************/
174	/* */
175	/* <Function> */
176	/* FT_Bitmap_Done */
177	/* */
178	/* <Description> */
179	/* Destroy a bitmap object created with @FT_Bitmap_New. */
180	/* */
181	/* <Input> */
182	/* library :: A handle to a library object. */
183	/* */
184	/* bitmap :: The bitmap object to be freed. */
185	/* */
186	/* <Return> */
187	/* FreeType error code. 0~means success. */
188	/* */
189	/* <Note> */
190	/* The `library' argument is taken to have access to FreeType's */
191	/* memory handling functions. */
192	/* */
193	FT_EXPORT( FT_Error )
194	FT_Bitmap_Done( FT_Library library,
195	FT_Bitmap *bitmap );
196
197
198	/* */
199
200
201	FT_END_HEADER
202
203	#endif /* __FTBITMAP_H__ */
204
205
206	/* END */

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