Aegisub/libass/ass_bitmap.h
Amar Takhar 2c2f85a93d Add changes from
http://greg.geekmind.org/mplayer/libass-snapshot-20090214.tar.gz

* \be filter with [1,2,1] kernel (like vsfilter)
* "decimal point" support, e.g. numbers with fractional parts are dealt with
  correctly
* shadow without border
* "compromise" fix for transparency + aa
* misc fixes: \be and \blur radius and a memory leak
* proper compositing of overlapping translucent outlines

Originally committed to SVN as r2733.
2009-02-14 19:19:35 +00:00

59 lines
2.1 KiB
C

// -*- c-basic-offset: 8; indent-tabs-mode: t -*-
// vim:ts=8:sw=8:noet:ai:
/*
* Copyright (C) 2006 Evgeniy Stepanov <eugeni.stepanov@gmail.com>
*
* This file is part of libass.
*
* libass is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* libass is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with libass; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef LIBASS_BITMAP_H
#define LIBASS_BITMAP_H
#define MAX_BOXBLUR 50
#include <ft2build.h>
#include FT_GLYPH_H
typedef struct ass_synth_priv_s ass_synth_priv_t;
typedef struct ass_be_priv_s ass_be_priv_t;
ass_be_priv_t* ass_be_init(void);
ass_synth_priv_t* ass_synth_init(double);
void ass_synth_done(ass_synth_priv_t* priv);
typedef struct bitmap_s {
int left, top;
int w, h; // width, height
unsigned char* buffer; // w x h buffer
} bitmap_t;
/**
* \brief perform glyph rendering
* \param glyph original glyph
* \param outline_glyph "border" glyph, produced from original by FreeType's glyph stroker
* \param bm_g out: pointer to the bitmap of original glyph is returned here
* \param bm_o out: pointer to the bitmap of outline (border) glyph is returned here
* \param bm_g out: pointer to the bitmap of glyph shadow is returned here
* \param be 1 = produces blurred bitmaps, 0 = normal bitmaps
*/
int glyph_to_bitmap(ass_synth_priv_t* priv, ass_synth_priv_t* priv_blur, FT_Glyph glyph, FT_Glyph outline_glyph, bitmap_t** bm_g, bitmap_t** bm_o, bitmap_t** bm_s, int be, double blur_radius, ass_be_priv_t* be_priv, bitmap_t** bm_oo);
void ass_free_bitmap(bitmap_t* bm);
bitmap_t* alloc_bitmap(int w, int h);
#endif /* LIBASS_BITMAP_H */