1 /*
2  * Copyright (C) 2006 Evgeniy Stepanov <eugeni.stepanov@gmail.com>
3  *
4  * This file is part of libass.
5  *
6  * Permission to use, copy, modify, and distribute this software for any
7  * purpose with or without fee is hereby granted, provided that the above
8  * copyright notice and this permission notice appear in all copies.
9  *
10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17  */
18 
19 #ifndef LIBASS_FONT_H
20 #define LIBASS_FONT_H
21 
22 #include <stdint.h>
23 #include <ft2build.h>
24 #include FT_GLYPH_H
25 #include FT_OUTLINE_H
26 
27 #include "ass.h"
28 #include "ass_types.h"
29 
30 #define VERTICAL_LOWER_BOUND 0x02f1
31 
32 #define ASS_FONT_MAX_FACES 10
33 #define DECO_UNDERLINE 1
34 #define DECO_STRIKETHROUGH 2
35 
36 typedef struct ass_shaper_font_data ASS_ShaperFontData;
37 
38 typedef struct {
39     char *family;
40     unsigned bold;
41     unsigned italic;
42     int treat_family_as_pattern;
43     int vertical;               // @font vertical layout
44 } ASS_FontDesc;
45 
46 typedef struct {
47     ASS_FontDesc desc;
48     ASS_Library *library;
49     FT_Library ftlibrary;
50     FT_Face faces[ASS_FONT_MAX_FACES];
51     ASS_ShaperFontData *shaper_priv;
52     int n_faces;
53     double scale_x, scale_y;    // current transform
54     FT_Vector v;                // current shift
55     double size;
56 } ASS_Font;
57 
58 #include "ass_cache.h"
59 
60 ASS_Font *ass_font_new(Cache *font_cache, ASS_Library *library,
61                        FT_Library ftlibrary, void *fc_priv,
62                        ASS_FontDesc *desc);
63 void ass_font_set_transform(ASS_Font *font, double scale_x,
64                             double scale_y, FT_Vector *v);
65 void ass_face_set_size(FT_Face face, double size);
66 void ass_font_set_size(ASS_Font *font, double size);
67 void ass_font_get_asc_desc(ASS_Font *font, uint32_t ch, int *asc,
68                            int *desc);
69 int ass_font_get_index(void *fcpriv, ASS_Font *font, uint32_t symbol,
70                        int *face_index, int *glyph_index);
71 FT_Glyph ass_font_get_glyph(void *fontconfig_priv, ASS_Font *font,
72                             uint32_t ch, int face_index, int index,
73                             ASS_Hinting hinting, int deco);
74 FT_Vector ass_font_get_kerning(ASS_Font *font, uint32_t c1, uint32_t c2);
75 void ass_font_free(ASS_Font *font);
76 void fix_freetype_stroker(FT_Outline *outline, int border_x, int border_y);
77 void outline_copy(FT_Library lib, FT_Outline *source, FT_Outline **dest);
78 void outline_free(FT_Library lib, FT_Outline *outline);
79 
80 #endif                          /* LIBASS_FONT_H */
81