libass/ass_bitmap.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_BITMAP_H
  22 #define LIBASS_BITMAP_H
  23
  24 #include <ft2build.h>
  25 #include FT_GLYPH_H
  26
  27 #include "ass.h"
  28
  29 typedef struct ass_synth_priv ASS_SynthPriv;
  30
  31 ASS_SynthPriv *ass_synth_init(double);
  32 void ass_synth_done(ASS_SynthPriv *priv);
  33
  34 typedef struct {
  35     int left, top;
  36     int w, h;                   // width, height
  37     unsigned char *buffer;      // w x h buffer
  38 } Bitmap;
  39
  40 /**
  41  * \brief perform glyph rendering
  42  * \param glyph original glyph
  43  * \param outline_glyph "border" glyph, produced from original by FreeType's glyph stroker
  44  * \param bm_g out: pointer to the bitmap of original glyph is returned here
  45  * \param bm_o out: pointer to the bitmap of outline (border) glyph is returned here
  46  * \param bm_g out: pointer to the bitmap of glyph shadow is returned here
  47  * \param be 1 = produces blurred bitmaps, 0 = normal bitmaps
  48  */
  49 int glyph_to_bitmap(ASS_Library *library, ASS_SynthPriv *priv_blur,
  50                     FT_Glyph glyph, FT_Glyph outline_glyph,
  51                     Bitmap **bm_g, Bitmap **bm_o, Bitmap **bm_s,
  52                     int be, double blur_radius, FT_Vector shadow_offset,
  53                     int border_style);
  54
  55 void ass_free_bitmap(Bitmap *bm);
  56
  57 #endif                          /* LIBASS_BITMAP_H */