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  * 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_BITMAP_H
  20 #define LIBASS_BITMAP_H
  21
  22 #include <ft2build.h>
  23 #include FT_GLYPH_H
  24
  25 #include "ass.h"
  26
  27 typedef struct ass_synth_priv ASS_SynthPriv;
  28
  29 ASS_SynthPriv *ass_synth_init(double);
  30 void ass_synth_done(ASS_SynthPriv *priv);
  31
  32 typedef struct {
  33     int left, top;
  34     int w, h;                   // width, height
  35     unsigned char *buffer;      // w x h buffer
  36 } Bitmap;
  37
  38 /**
  39  * \brief perform glyph rendering
  40  * \param glyph original glyph
  41  * \param outline_glyph "border" glyph, produced from original by FreeType's glyph stroker
  42  * \param bm_g out: pointer to the bitmap of original glyph is returned here
  43  * \param bm_o out: pointer to the bitmap of outline (border) glyph is returned here
  44  * \param bm_g out: pointer to the bitmap of glyph shadow is returned here
  45  * \param be 1 = produces blurred bitmaps, 0 = normal bitmaps
  46  */
  47 int glyph_to_bitmap(ASS_Library *library, ASS_SynthPriv *priv_blur,
  48                     FT_Glyph glyph, FT_Glyph outline_glyph,
  49                     Bitmap **bm_g, Bitmap **bm_o, Bitmap **bm_s,
  50                     int be, double blur_radius, FT_Vector shadow_offset,
  51                     int border_style);
  52
  53 void ass_free_bitmap(Bitmap *bm);
  54 int check_glyph_area(ASS_Library *library, FT_Glyph glyph);
  55
  56 #endif                          /* LIBASS_BITMAP_H */