1 /**************************************************************************** 2 * 3 * sfwoff2.h 4 * 5 * WOFFF2 format management (specification). 6 * 7 * Copyright (C) 2019-2020 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 27 FT_BEGIN_HEADER 28 29 30 /* Leave the first byte open to store `flag_byte'. */ 31 #define WOFF2_FLAGS_TRANSFORM 1 << 8 32 33 #define WOFF2_SFNT_HEADER_SIZE 12 34 #define WOFF2_SFNT_ENTRY_SIZE 16 35 36 /* Suggested maximum size for output. */ 37 #define WOFF2_DEFAULT_MAX_SIZE 30 * 1024 * 1024 38 39 /* 98% of Google Fonts have no glyph above 5k bytes. */ 40 #define WOFF2_DEFAULT_GLYPH_BUF 5120 41 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 50 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 58 59 /* Other constants */ 60 #define CONTOUR_OFFSET_END_POINT 10 61 62 63 FT_LOCAL( FT_Error ) 64 woff2_open_font( FT_Stream stream, 65 TT_Face face, 66 FT_Int* face_index, 67 FT_Long* num_faces ); 68 69 70 FT_END_HEADER 71 72 #endif /* SFWOFF2_H_ */ 73 74 75 /* END */ 76