1/****************************************************************************
2 *
3 * sfwoff2.h
4 *
5 * WOFFF2 format management (specification).
6 *
7 * Copyright (C) 2019-2023 by
8 * Nikhil Ramakrishnan, David Turner, Robert Wilhelm, and Werner Lemberg.
9 *
10 * This file is part of the FreeType project, and may only be used,
11 * modified, and distributed under the terms of the FreeType project
12 * license, LICENSE.TXT. By continuing to use, modify, or distribute
13 * this file you indicate that you have read the license and
14 * understand and accept it fully.
15 *
16 */
17
18
19#ifndef SFWOFF2_H_
20#define SFWOFF2_H_
21
22
23#include <freetype/internal/sfnt.h>
24#include <freetype/internal/ftobjs.h>
25
26
27FT_BEGIN_HEADER
28
29#ifdef FT_CONFIG_OPTION_USE_BROTLI
30
31 /* Leave the first byte open to store `flag_byte'. */
32#define WOFF2_FLAGS_TRANSFORM 1 << 8
33
34#define WOFF2_SFNT_HEADER_SIZE 12
35#define WOFF2_SFNT_ENTRY_SIZE 16
36
37 /* Suggested maximum size for output. */
38#define WOFF2_DEFAULT_MAX_SIZE 30 * 1024 * 1024
39
40 /* 98% of Google Fonts have no glyph above 5k bytes. */
41#define WOFF2_DEFAULT_GLYPH_BUF 5120
42
43 /* Composite glyph flags. */
44 /* See `CompositeGlyph.java' in `sfntly' for full definitions. */
45#define FLAG_ARG_1_AND_2_ARE_WORDS 1 << 0
46#define FLAG_WE_HAVE_A_SCALE 1 << 3
47#define FLAG_MORE_COMPONENTS 1 << 5
48#define FLAG_WE_HAVE_AN_X_AND_Y_SCALE 1 << 6
49#define FLAG_WE_HAVE_A_TWO_BY_TWO 1 << 7
50#define FLAG_WE_HAVE_INSTRUCTIONS 1 << 8
51
52 /* Simple glyph flags */
53#define GLYF_ON_CURVE 1 << 0
54#define GLYF_X_SHORT 1 << 1
55#define GLYF_Y_SHORT 1 << 2
56#define GLYF_REPEAT 1 << 3
57#define GLYF_THIS_X_IS_SAME 1 << 4
58#define GLYF_THIS_Y_IS_SAME 1 << 5
59#define GLYF_OVERLAP_SIMPLE 1 << 6
60
61 /* Other constants */
62#define CONTOUR_OFFSET_END_POINT 10
63
64
65 FT_LOCAL( FT_Error )
66 woff2_open_font( FT_Stream stream,
67 TT_Face face,
68 FT_Int* face_index,
69 FT_Long* num_faces );
70
71#endif /* FT_CONFIG_OPTION_USE_BROTLI */
72
73FT_END_HEADER
74
75#endif /* SFWOFF2_H_ */
76
77
78/* END */
79