1 // -*- c-basic-offset: 8; indent-tabs-mode: t -*-
2 // vim:ts=8:sw=8:noet:ai:
4 Copyright (C) 2006 Evgeniy Stepanov <eugeni.stepanov@gmail.com>
6 This program 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.
11 This program 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.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 #ifndef __ASS_CACHE_H__
22 #define __ASS_CACHE_H__
25 #include FT_FREETYPE_H
30 typedef struct ass_font_desc_s {
36 typedef struct ass_font_s {
41 FT_Matrix m; // current transformation
42 FT_Vector v; // current shift
46 void ass_font_cache_init(void);
47 ass_font_t* ass_new_font(FT_Library library, void* fontconfig_priv, ass_font_desc_t* desc);
48 void ass_font_cache_done(void);
51 // describes a glyph; glyphs with equivalents structs are considered identical
52 typedef struct glyph_hash_key_s {
53 char bitmap; // bool : true = bitmap, false = outline
55 int size; // font size
56 int index; // glyph index in the face
57 unsigned outline; // border width, 16.16 fixed point value
59 char be; // blur edges
61 // the following affects bitmap glyphs only
62 unsigned scale_x, scale_y; // 16.16
63 int angle; // signed 16.16
65 FT_Vector advance; // subpixel shift vector
68 typedef struct glyph_hash_val_s {
69 bitmap_t* bm; // the actual glyph bitmaps
72 FT_BBox bbox_scaled; // bbox after scaling, but before rotation
73 FT_Vector advance; // 26.6, advance distance to the next glyph in line
76 void ass_glyph_cache_init(void);
77 void cache_add_glyph(glyph_hash_key_t* key, glyph_hash_val_t* val);
78 glyph_hash_val_t* cache_find_glyph(glyph_hash_key_t* key);
79 void ass_glyph_cache_reset(void);
80 void ass_glyph_cache_done(void);