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Issue 1416993005: Merge to XFA: Update bundled freetype to 2.6.1 (Closed) Base URL: https://pdfium.googlesource.com/pdfium.git@xfa
Patch Set: Created 5 years, 1 month ago
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1 /***************************************************************************/
2 /* */
3 /* ftbitmap.h */
4 /* */
5 /* FreeType utility functions for bitmaps (specification). */
6 /* */
7 /* Copyright 2004-2006, 2008, 2013, 2014 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 __FTBITMAP_H__
20 #define __FTBITMAP_H__
21
22
23 #include <ft2build.h>
24 #include FT_FREETYPE_H
25
26 #ifdef FREETYPE_H
27 #error "freetype.h of FreeType 1 has been loaded!"
28 #error "Please fix the directory search order for header files"
29 #error "so that freetype.h of FreeType 2 is found first."
30 #endif
31
32
33 FT_BEGIN_HEADER
34
35
36 /*************************************************************************/
37 /* */
38 /* <Section> */
39 /* bitmap_handling */
40 /* */
41 /* <Title> */
42 /* Bitmap Handling */
43 /* */
44 /* <Abstract> */
45 /* Handling FT_Bitmap objects. */
46 /* */
47 /* <Description> */
48 /* This section contains functions for handling @FT_Bitmap objects. */
49 /* Note that none of the functions changes the bitmap's `flow' (as */
50 /* indicated by the sign of the `pitch' field in `FT_Bitmap'). */
51 /* */
52 /*************************************************************************/
53
54
55 /*************************************************************************/
56 /* */
57 /* <Function> */
58 /* FT_Bitmap_New */
59 /* */
60 /* <Description> */
61 /* Initialize a pointer to an @FT_Bitmap structure. */
62 /* */
63 /* <InOut> */
64 /* abitmap :: A pointer to the bitmap structure. */
65 /* */
66 FT_EXPORT( void )
67 FT_Bitmap_New( FT_Bitmap *abitmap );
68
69
70 /*************************************************************************/
71 /* */
72 /* <Function> */
73 /* FT_Bitmap_Copy */
74 /* */
75 /* <Description> */
76 /* Copy a bitmap into another one. */
77 /* */
78 /* <Input> */
79 /* library :: A handle to a library object. */
80 /* */
81 /* source :: A handle to the source bitmap. */
82 /* */
83 /* <Output> */
84 /* target :: A handle to the target bitmap. */
85 /* */
86 /* <Return> */
87 /* FreeType error code. 0~means success. */
88 /* */
89 FT_EXPORT( FT_Error )
90 FT_Bitmap_Copy( FT_Library library,
91 const FT_Bitmap *source,
92 FT_Bitmap *target);
93
94
95 /*************************************************************************/
96 /* */
97 /* <Function> */
98 /* FT_Bitmap_Embolden */
99 /* */
100 /* <Description> */
101 /* Embolden a bitmap. The new bitmap will be about `xStrength' */
102 /* pixels wider and `yStrength' pixels higher. The left and bottom */
103 /* borders are kept unchanged. */
104 /* */
105 /* <Input> */
106 /* library :: A handle to a library object. */
107 /* */
108 /* xStrength :: How strong the glyph is emboldened horizontally. */
109 /* Expressed in 26.6 pixel format. */
110 /* */
111 /* yStrength :: How strong the glyph is emboldened vertically. */
112 /* Expressed in 26.6 pixel format. */
113 /* */
114 /* <InOut> */
115 /* bitmap :: A handle to the target bitmap. */
116 /* */
117 /* <Return> */
118 /* FreeType error code. 0~means success. */
119 /* */
120 /* <Note> */
121 /* The current implementation restricts `xStrength' to be less than */
122 /* or equal to~8 if bitmap is of pixel_mode @FT_PIXEL_MODE_MONO. */
123 /* */
124 /* If you want to embolden the bitmap owned by a @FT_GlyphSlotRec, */
125 /* you should call @FT_GlyphSlot_Own_Bitmap on the slot first. */
126 /* */
127 /* Bitmaps in @FT_PIXEL_MODE_GRAY2 and @FT_PIXEL_MODE_GRAY@ format */
128 /* are converted to @FT_PIXEL_MODE_GRAY format (i.e., 8bpp). */
129 /* */
130 FT_EXPORT( FT_Error )
131 FT_Bitmap_Embolden( FT_Library library,
132 FT_Bitmap* bitmap,
133 FT_Pos xStrength,
134 FT_Pos yStrength );
135
136
137 /*************************************************************************/
138 /* */
139 /* <Function> */
140 /* FT_Bitmap_Convert */
141 /* */
142 /* <Description> */
143 /* Convert a bitmap object with depth 1bpp, 2bpp, 4bpp, 8bpp or 32bpp */
144 /* to a bitmap object with depth 8bpp, making the number of used */
145 /* bytes line (a.k.a. the `pitch') a multiple of `alignment'. */
146 /* */
147 /* <Input> */
148 /* library :: A handle to a library object. */
149 /* */
150 /* source :: The source bitmap. */
151 /* */
152 /* alignment :: The pitch of the bitmap is a multiple of this */
153 /* parameter. Common values are 1, 2, or 4. */
154 /* */
155 /* <Output> */
156 /* target :: The target bitmap. */
157 /* */
158 /* <Return> */
159 /* FreeType error code. 0~means success. */
160 /* */
161 /* <Note> */
162 /* It is possible to call @FT_Bitmap_Convert multiple times without */
163 /* calling @FT_Bitmap_Done (the memory is simply reallocated). */
164 /* */
165 /* Use @FT_Bitmap_Done to finally remove the bitmap object. */
166 /* */
167 /* The `library' argument is taken to have access to FreeType's */
168 /* memory handling functions. */
169 /* */
170 FT_EXPORT( FT_Error )
171 FT_Bitmap_Convert( FT_Library library,
172 const FT_Bitmap *source,
173 FT_Bitmap *target,
174 FT_Int alignment );
175
176
177 /*************************************************************************/
178 /* */
179 /* <Function> */
180 /* FT_GlyphSlot_Own_Bitmap */
181 /* */
182 /* <Description> */
183 /* Make sure that a glyph slot owns `slot->bitmap'. */
184 /* */
185 /* <Input> */
186 /* slot :: The glyph slot. */
187 /* */
188 /* <Return> */
189 /* FreeType error code. 0~means success. */
190 /* */
191 /* <Note> */
192 /* This function is to be used in combination with */
193 /* @FT_Bitmap_Embolden. */
194 /* */
195 FT_EXPORT( FT_Error )
196 FT_GlyphSlot_Own_Bitmap( FT_GlyphSlot slot );
197
198
199 /*************************************************************************/
200 /* */
201 /* <Function> */
202 /* FT_Bitmap_Done */
203 /* */
204 /* <Description> */
205 /* Destroy a bitmap object created with @FT_Bitmap_New. */
206 /* */
207 /* <Input> */
208 /* library :: A handle to a library object. */
209 /* */
210 /* bitmap :: The bitmap object to be freed. */
211 /* */
212 /* <Return> */
213 /* FreeType error code. 0~means success. */
214 /* */
215 /* <Note> */
216 /* The `library' argument is taken to have access to FreeType's */
217 /* memory handling functions. */
218 /* */
219 FT_EXPORT( FT_Error )
220 FT_Bitmap_Done( FT_Library library,
221 FT_Bitmap *bitmap );
222
223
224 /* */
225
226
227 FT_END_HEADER
228
229 #endif /* __FTBITMAP_H__ */
230
231
232 /* END */
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