1 /****************************************************************************
5 * WOFFF2 format management (specification).
7 * Copyright (C) 2019-2020 by
8 * Nikhil Ramakrishnan, David Turner, Robert Wilhelm, and Werner Lemberg.
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.
23 #include <freetype/internal/sfnt.h>
24 #include <freetype/internal/ftobjs.h>
30 /* Leave the first byte open to store `flag_byte'. */
31 #define WOFF2_FLAGS_TRANSFORM 1 << 8
33 #define WOFF2_SFNT_HEADER_SIZE 12
34 #define WOFF2_SFNT_ENTRY_SIZE 16
36 /* Suggested maximum size for output. */
37 #define WOFF2_DEFAULT_MAX_SIZE 30 * 1024 * 1024
39 /* 98% of Google Fonts have no glyph above 5k bytes. */
40 #define WOFF2_DEFAULT_GLYPH_BUF 5120
42 /* Composite glyph flags. */
43 /* See `CompositeGlyph.java' in `sfntly' for full definitions. */
44 #define FLAG_ARG_1_AND_2_ARE_WORDS 1 << 0
45 #define FLAG_WE_HAVE_A_SCALE 1 << 3
46 #define FLAG_MORE_COMPONENTS 1 << 5
47 #define FLAG_WE_HAVE_AN_X_AND_Y_SCALE 1 << 6
48 #define FLAG_WE_HAVE_A_TWO_BY_TWO 1 << 7
49 #define FLAG_WE_HAVE_INSTRUCTIONS 1 << 8
51 /* Simple glyph flags */
52 #define GLYF_ON_CURVE 1 << 0
53 #define GLYF_X_SHORT 1 << 1
54 #define GLYF_Y_SHORT 1 << 2
55 #define GLYF_REPEAT 1 << 3
56 #define GLYF_THIS_X_IS_SAME 1 << 4
57 #define GLYF_THIS_Y_IS_SAME 1 << 5
60 #define CONTOUR_OFFSET_END_POINT 10
64 woff2_open_font( FT_Stream stream,
72 #endif /* SFWOFF2_H_ */