afblue.hin (5369B)
1 /**************************************************************************** 2 * 3 * afblue.h 4 * 5 * Auto-fitter data for blue strings (specification). 6 * 7 * Copyright (C) 2013-2025 by 8 * 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 AFBLUE_H_ 20 #define AFBLUE_H_ 21 22 23 FT_BEGIN_HEADER 24 25 26 /* an auxiliary macro to decode a UTF-8 character -- since we only use */ 27 /* hard-coded, self-converted data, no error checking is performed */ 28 #define GET_UTF8_CHAR( ch, p ) \ 29 do \ 30 { \ 31 ch = (unsigned char)*p++; \ 32 if ( ch >= 0x80 ) \ 33 { \ 34 FT_UInt len_; \ 35 \ 36 \ 37 if ( ch < 0xE0 ) \ 38 { \ 39 len_ = 1; \ 40 ch &= 0x1F; \ 41 } \ 42 else if ( ch < 0xF0 ) \ 43 { \ 44 len_ = 2; \ 45 ch &= 0x0F; \ 46 } \ 47 else \ 48 { \ 49 len_ = 3; \ 50 ch &= 0x07; \ 51 } \ 52 \ 53 for ( ; len_ > 0; len_-- ) \ 54 ch = ( ch << 6 ) | ( *p++ & 0x3F ); \ 55 } \ 56 } while ( 0 ) 57 58 59 /*************************************************************************/ 60 /*************************************************************************/ 61 /***** *****/ 62 /***** B L U E S T R I N G S *****/ 63 /***** *****/ 64 /*************************************************************************/ 65 /*************************************************************************/ 66 67 /* At the bottommost level, we define strings for finding blue zones. */ 68 69 70 #define AF_BLUE_STRING_MAX_LEN @AF_BLUE_STRING_MAX_LEN@ 71 72 /* The AF_Blue_String enumeration values are offsets into the */ 73 /* `af_blue_strings' array. */ 74 75 typedef enum AF_Blue_String_ 76 { 77 @AF_BLUE_STRING_ENUM@ 78 79 AF_BLUE_STRING_MAX /* do not remove */ 80 81 } AF_Blue_String; 82 83 84 FT_LOCAL_ARRAY( char ) 85 af_blue_strings[]; 86 87 88 /*************************************************************************/ 89 /*************************************************************************/ 90 /***** *****/ 91 /***** B L U E S T R I N G S E T S *****/ 92 /***** *****/ 93 /*************************************************************************/ 94 /*************************************************************************/ 95 96 /* The next level is to group blue strings into style-specific sets. */ 97 98 99 /* Properties are specific to a writing system. We assume that a given */ 100 /* blue string can't be used in more than a single writing system, which */ 101 /* is a safe bet. */ 102 #define AF_BLUE_PROPERTY_LATIN_TOP ( 1U << 0 ) /* must be value 1 */ 103 #define AF_BLUE_PROPERTY_LATIN_SUB_TOP ( 1U << 1 ) 104 #define AF_BLUE_PROPERTY_LATIN_NEUTRAL ( 1U << 2 ) 105 #define AF_BLUE_PROPERTY_LATIN_X_HEIGHT ( 1U << 3 ) 106 #define AF_BLUE_PROPERTY_LATIN_LONG ( 1U << 4 ) 107 108 #define AF_BLUE_PROPERTY_LATIN_CAPITAL_BOTTOM ( 1U << 5 ) 109 #define AF_BLUE_PROPERTY_LATIN_SMALL_BOTTOM ( 1U << 6 ) 110 111 #define AF_BLUE_PROPERTY_CJK_TOP ( 1U << 0 ) /* must be value 1 */ 112 #define AF_BLUE_PROPERTY_CJK_HORIZ ( 1U << 1 ) /* must be value 2 */ 113 #define AF_BLUE_PROPERTY_CJK_RIGHT AF_BLUE_PROPERTY_CJK_TOP 114 115 116 #define AF_BLUE_STRINGSET_MAX_LEN @AF_BLUE_STRINGSET_MAX_LEN@ 117 118 /* The AF_Blue_Stringset enumeration values are offsets into the */ 119 /* `af_blue_stringsets' array. */ 120 121 typedef enum AF_Blue_Stringset_ 122 { 123 @AF_BLUE_STRINGSET_ENUM@ 124 125 AF_BLUE_STRINGSET_MAX /* do not remove */ 126 127 } AF_Blue_Stringset; 128 129 130 typedef struct AF_Blue_StringRec_ 131 { 132 AF_Blue_String string; 133 FT_UShort properties; 134 135 } AF_Blue_StringRec; 136 137 138 FT_LOCAL_ARRAY( AF_Blue_StringRec ) 139 af_blue_stringsets[]; 140 141 /* */ 142 143 FT_END_HEADER 144 145 146 #endif /* AFBLUE_H_ */ 147 148 149 /* END */