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  * libass is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * libass is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with libass; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  */
  20
  21 #ifndef LIBASS_FONT_H
  22 #define LIBASS_FONT_H
  23
  24 #include <stdint.h>
  25 #include <ft2build.h>
  26 #include FT_GLYPH_H
  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 {
  35     char *family;
  36     unsigned bold;
  37     unsigned italic;
  38     int treat_family_as_pattern;
  39 } ASS_FontDesc;
  40
  41 typedef struct {
  42     ASS_FontDesc desc;
  43     ASS_Library *library;
  44     FT_Library ftlibrary;
  45     FT_Face faces[ASS_FONT_MAX_FACES];
  46     int n_faces;
  47     double scale_x, scale_y;    // current transform
  48     FT_Vector v;                // current shift
  49     double size;
  50 } ASS_Font;
  51
  52 // FIXME: passing the hashmap via a void pointer is very ugly.
  53 ASS_Font *ass_font_new(void *font_cache, ASS_Library *library,
  54                        FT_Library ftlibrary, void *fc_priv,
  55                        ASS_FontDesc *desc);
  56 void ass_font_set_transform(ASS_Font *font, double scale_x,
  57                             double scale_y, FT_Vector *v);
  58 void ass_font_set_size(ASS_Font *font, double size);
  59 void ass_font_get_asc_desc(ASS_Font *font, uint32_t ch, int *asc,
  60                            int *desc);
  61 FT_Glyph ass_font_get_glyph(void *fontconfig_priv, ASS_Font *font,
  62                             uint32_t ch, ASS_Hinting hinting, int flags);
  63 FT_Vector ass_font_get_kerning(ASS_Font *font, uint32_t c1, uint32_t c2);
  64 void ass_font_free(ASS_Font *font);
  65
  66 #endif                          /* LIBASS_FONT_H */