1 /***************************************************************************/ 2 /* */ 3 /* afblue.h */ 4 /* */ 5 /* Auto-fitter data for blue strings (specification). */ 6 /* */ 7 /* Copyright 2013-2015 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 ch = (unsigned char)*p++; \ 30 if ( ch >= 0x80 ) \ 31 { \ 32 FT_UInt len; \ 33 \ 34 \ 35 if ( ch < 0xE0 ) \ 36 { \ 37 len = 1; \ 38 ch &= 0x1F; \ 39 } \ 40 else if ( ch < 0xF0 ) \ 41 { \ 42 len = 2; \ 43 ch &= 0x0F; \ 44 } \ 45 else \ 46 { \ 47 len = 3; \ 48 ch &= 0x07; \ 49 } \ 50 \ 51 for ( ; len > 0; len-- ) \ 52 ch = ( ch << 6 ) | ( *p++ & 0x3F ); \ 53 } 54 55 56 /*************************************************************************/ 57 /*************************************************************************/ 58 /***** *****/ 59 /***** B L U E S T R I N G S *****/ 60 /***** *****/ 61 /*************************************************************************/ 62 /*************************************************************************/ 63 64 /* At the bottommost level, we define strings for finding blue zones. */ 65 66 67 #define AF_BLUE_STRING_MAX_LEN @AF_BLUE_STRING_MAX_LEN@ 68 69 /* The AF_Blue_String enumeration values are offsets into the */ 70 /* `af_blue_strings' array. */ 71 72 typedef enum AF_Blue_String_ 73 { 74 @AF_BLUE_STRING_ENUM@ 75 76 AF_BLUE_STRING_MAX /* do not remove */ 77 78 } AF_Blue_String; 79 80 81 FT_LOCAL_ARRAY( char ) 82 af_blue_strings[]; 83 84 85 /*************************************************************************/ 86 /*************************************************************************/ 87 /***** *****/ 88 /***** B L U E S T R I N G S E T S *****/ 89 /***** *****/ 90 /*************************************************************************/ 91 /*************************************************************************/ 92 93 /* The next level is to group blue strings into style-specific sets. */ 94 95 96 /* Properties are specific to a writing system. We assume that a given */ 97 /* blue string can't be used in more than a single writing system, which */ 98 /* is a safe bet. */ 99 #define AF_BLUE_PROPERTY_LATIN_TOP ( 1U << 0 ) /* must have value 1 */ 100 #define AF_BLUE_PROPERTY_LATIN_NEUTRAL ( 1U << 1 ) 101 #define AF_BLUE_PROPERTY_LATIN_X_HEIGHT ( 1U << 2 ) 102 #define AF_BLUE_PROPERTY_LATIN_LONG ( 1U << 3 ) 103 104 #define AF_BLUE_PROPERTY_CJK_TOP ( 1U << 0 ) /* must have value 1 */ 105 #define AF_BLUE_PROPERTY_CJK_HORIZ ( 1U << 1 ) /* must have value 2 */ 106 #define AF_BLUE_PROPERTY_CJK_RIGHT AF_BLUE_PROPERTY_CJK_TOP 107 108 109 #define AF_BLUE_STRINGSET_MAX_LEN @AF_BLUE_STRINGSET_MAX_LEN@ 110 111 /* The AF_Blue_Stringset enumeration values are offsets into the */ 112 /* `af_blue_stringsets' array. */ 113 114 typedef enum AF_Blue_Stringset_ 115 { 116 @AF_BLUE_STRINGSET_ENUM@ 117 118 AF_BLUE_STRINGSET_MAX /* do not remove */ 119 120 } AF_Blue_Stringset; 121 122 123 typedef struct AF_Blue_StringRec_ 124 { 125 AF_Blue_String string; 126 FT_UShort properties; 127 128 } AF_Blue_StringRec; 129 130 131 FT_LOCAL_ARRAY( AF_Blue_StringRec ) 132 af_blue_stringsets[]; 133 134 /* */ 135 136 FT_END_HEADER 137 138 139 #endif /* __AFBLUE_H__ */ 140 141 142 /* END */ 143
