/**************************************************************************** * * afblue.h * * Auto-fitter data for blue strings (specification). * * Copyright (C) 2013-2019 by * David Turner, Robert Wilhelm, and Werner Lemberg. * * This file is part of the FreeType project, and may only be used, * modified, and distributed under the terms of the FreeType project * license, LICENSE.TXT. By continuing to use, modify, or distribute * this file you indicate that you have read the license and * understand and accept it fully. * */ #ifndef AFBLUE_H_ #define AFBLUE_H_ FT_BEGIN_HEADER /* an auxiliary macro to decode a UTF-8 character -- since we only use */ /* hard-coded, self-converted data, no error checking is performed */ #define GET_UTF8_CHAR( ch, p ) \ do \ { \ ch = (unsigned char)*p++; \ if ( ch >= 0x80 ) \ { \ FT_UInt len_; \ \ \ if ( ch < 0xE0 ) \ { \ len_ = 1; \ ch &= 0x1F; \ } \ else if ( ch < 0xF0 ) \ { \ len_ = 2; \ ch &= 0x0F; \ } \ else \ { \ len_ = 3; \ ch &= 0x07; \ } \ \ for ( ; len_ > 0; len_-- ) \ ch = ( ch << 6 ) | ( *p++ & 0x3F ); \ } \ } while ( 0 ) /*************************************************************************/ /*************************************************************************/ /***** *****/ /***** B L U E S T R I N G S *****/ /***** *****/ /*************************************************************************/ /*************************************************************************/ /* At the bottommost level, we define strings for finding blue zones. */ #define AF_BLUE_STRING_MAX_LEN @AF_BLUE_STRING_MAX_LEN@ /* The AF_Blue_String enumeration values are offsets into the */ /* `af_blue_strings' array. */ typedef enum AF_Blue_String_ { @AF_BLUE_STRING_ENUM@ AF_BLUE_STRING_MAX /* do not remove */ } AF_Blue_String; FT_LOCAL_ARRAY( char ) af_blue_strings[]; /*************************************************************************/ /*************************************************************************/ /***** *****/ /***** B L U E S T R I N G S E T S *****/ /***** *****/ /*************************************************************************/ /*************************************************************************/ /* The next level is to group blue strings into style-specific sets. */ /* Properties are specific to a writing system. We assume that a given */ /* blue string can't be used in more than a single writing system, which */ /* is a safe bet. */ #define AF_BLUE_PROPERTY_LATIN_TOP ( 1U << 0 ) /* must have value 1 */ #define AF_BLUE_PROPERTY_LATIN_SUB_TOP ( 1U << 1 ) #define AF_BLUE_PROPERTY_LATIN_NEUTRAL ( 1U << 2 ) #define AF_BLUE_PROPERTY_LATIN_X_HEIGHT ( 1U << 3 ) #define AF_BLUE_PROPERTY_LATIN_LONG ( 1U << 4 ) #define AF_BLUE_PROPERTY_CJK_TOP ( 1U << 0 ) /* must have value 1 */ #define AF_BLUE_PROPERTY_CJK_HORIZ ( 1U << 1 ) /* must have value 2 */ #define AF_BLUE_PROPERTY_CJK_RIGHT AF_BLUE_PROPERTY_CJK_TOP #define AF_BLUE_STRINGSET_MAX_LEN @AF_BLUE_STRINGSET_MAX_LEN@ /* The AF_Blue_Stringset enumeration values are offsets into the */ /* `af_blue_stringsets' array. */ typedef enum AF_Blue_Stringset_ { @AF_BLUE_STRINGSET_ENUM@ AF_BLUE_STRINGSET_MAX /* do not remove */ } AF_Blue_Stringset; typedef struct AF_Blue_StringRec_ { AF_Blue_String string; FT_UShort properties; } AF_Blue_StringRec; FT_LOCAL_ARRAY( AF_Blue_StringRec ) af_blue_stringsets[]; /* */ FT_END_HEADER #endif /* AFBLUE_H_ */ /* END */