libass/ass_font.h

   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 ASS_FONT_MAX_FACES 10
  31 #define DECO_UNDERLINE 1
  32 #define DECO_STRIKETHROUGH 2
  33
  34 typedef struct ass_shaper_font_data ASS_ShaperFontData;
  35
  36 typedef struct {
  37     char *family;
  38     unsigned bold;
  39     unsigned italic;
  40     int treat_family_as_pattern;
  41     int vertical;               // @font vertical layout
  42 } ASS_FontDesc;
  43
  44 typedef struct {
  45     ASS_FontDesc desc;
  46     ASS_Library *library;
  47     FT_Library ftlibrary;
  48     FT_Face faces[ASS_FONT_MAX_FACES];
  49     ASS_ShaperFontData *shaper_priv;
  50     int n_faces;
  51     double scale_x, scale_y;    // current transform
  52     FT_Vector v;                // current shift
  53     double size;
  54 } ASS_Font;
  55
  56 #include "ass_cache.h"
  57
  58 ASS_Font *ass_font_new(Cache *font_cache, ASS_Library *library,
  59                        FT_Library ftlibrary, void *fc_priv,
  60                        ASS_FontDesc *desc);
  61 void ass_font_set_transform(ASS_Font *font, double scale_x,
  62                             double scale_y, FT_Vector *v);
  63 void ass_face_set_size(FT_Face face, double size);
  64 void ass_font_set_size(ASS_Font *font, double size);
  65 void ass_font_get_asc_desc(ASS_Font *font, uint32_t ch, int *asc,
  66                            int *desc);
  67 int ass_font_get_index(void *fcpriv, ASS_Font *font, uint32_t symbol,
  68                        int *face_index, int *glyph_index);
  69 FT_Glyph ass_font_get_glyph(void *fontconfig_priv, ASS_Font *font,
  70                             uint32_t ch, int face_index, int index,
  71                             ASS_Hinting hinting, int deco);
  72 FT_Vector ass_font_get_kerning(ASS_Font *font, uint32_t c1, uint32_t c2);
  73 void ass_font_free(ASS_Font *font);
  74 void fix_freetype_stroker(FT_Outline *outline, int border_x, int border_y);
  75 void outline_copy(FT_Library lib, FT_Outline *source, FT_Outline **dest);
  76 void outline_free(FT_Library lib, FT_Outline *outline);
  77
  78 #endif                          /* LIBASS_FONT_H */