/****************************************************************************
*
* afblue.h
*
* Auto-fitter data for blue strings (specification).
*
* Copyright (C) 2013-2023 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 */
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