Aegisub/aegisub/libass/ass_drawing.h

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/*
* Copyright (C) 2009 Grigori Goronzy <greg@geekmind.org>
*
* This file is part of libass.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef LIBASS_DRAWING_H
#define LIBASS_DRAWING_H
#include <ft2build.h>
#include FT_GLYPH_H
#include "ass.h"
#define DRAWING_INITIAL_SIZE 256
enum ass_token_type {
TOKEN_MOVE,
TOKEN_MOVE_NC,
TOKEN_LINE,
TOKEN_CUBIC_BEZIER,
TOKEN_CONIC_BEZIER,
TOKEN_B_SPLINE,
TOKEN_EXTEND_SPLINE,
TOKEN_CLOSE
};
typedef struct ass_drawing_token_s {
enum ass_token_type type;
FT_Vector point;
struct ass_drawing_token_s *next;
struct ass_drawing_token_s *prev;
} ass_drawing_token_t;
typedef struct ass_drawing_s {
char *text; // drawing string
int i; // text index
int scale; // scale (1-64) for subpixel accuracy
double pbo; // drawing will be shifted in y direction by this amount
double scale_x; // FontScaleX
double scale_y; // FontScaleY
int asc; // ascender
int desc; // descender
FT_OutlineGlyph glyph; // the "fake" glyph created for later rendering
int hash; // hash value (for caching)
// private
FT_Library ftlibrary; // FT library instance, needed for font ops
ass_library_t *library;
int size; // current buffer size
ass_drawing_token_t *tokens; // tokenized drawing
int max_points; // current maximum size
int max_contours;
double point_scale_x;
double point_scale_y;
} ass_drawing_t;
ass_drawing_t *ass_drawing_new(void *fontconfig_priv, ass_font_t *font,
ass_hinting_t hint, FT_Library lib);
void ass_drawing_free(ass_drawing_t* drawing);
void ass_drawing_add_char(ass_drawing_t* drawing, char symbol);
void ass_drawing_hash(ass_drawing_t* drawing);
FT_OutlineGlyph *ass_drawing_parse(ass_drawing_t *drawing, int raw_mode);
#endif /* LIBASS_DRAWING_H */