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freetype/src/autofit/afblue.h

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[autofit] Introduce data file for blue strings. The idea is to have a central file which gets processed by a Perl script to create proper `.c' and `.h' files using templates. There are two other reasons to do that: . The data file should be easily readable. We use UTF-8 encoding which then gets converted to single bytes. . Since the number of supported scripts will increase soon, the current usage of blue string arrays is a waste of space. Using the Perl script it is possible to imitate jagged arrays, defining enumeration constants as offsets into the arrays. This commit only adds files without changing any functionality. * src/autofit/afblue.dat: New data file. * src/tools/afblue.pl: New Perl script for processing `afblue.dat'. * src/autofit/afblue.cin, src/autofit/afblue.hin: New template files for... * src/autofit/afblue.c, src/autofit/afblue.c: New source files. To avoid a dependency on Perl, we add them too.
2013-08-25 08:01:41 +02:00
/* This file has been generated by the Perl script `afblue.pl', */
/* using data from file `afblue.dat'. */
/***************************************************************************/
/* */
/* afblue.h */
/* */
/* Auto-fitter data for blue strings (specification). */
/* */
/* Copyright 2013 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 ) \
ch = *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 ); \
}
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** 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 25
/* The AF_Blue_String enumeration values are offsets into the */
/* `af_blue_strings' array. */
typedef enum AF_Blue_String_
{
AF_BLUE_STRING_LATIN_CAPITAL_TOP = 0,
AF_BLUE_STRING_LATIN_CAPITAL_BOTTOM = 9,
AF_BLUE_STRING_LATIN_SMALL_F_TOP = 18,
AF_BLUE_STRING_LATIN_SMALL = 26,
AF_BLUE_STRING_LATIN_SMALL_MINOR = 34,
af_blue_1_1 = 39,
#ifdef AF_CONFIG_OPTION_CJK
AF_BLUE_STRING_CJK_TOP_FILL = af_blue_1_1 + 1,
AF_BLUE_STRING_CJK_TOP_UNFILL = af_blue_1_1 + 77,
AF_BLUE_STRING_CJK_BOTTOM_FILL = af_blue_1_1 + 153,
AF_BLUE_STRING_CJK_BOTTOM_UNFILL = af_blue_1_1 + 229,
af_blue_1_1_1 = af_blue_1_1 + 304,
#ifdef AF_CONFIG_OPTION_CJK_BLUE_HANI_VERT
AF_BLUE_STRING_CJK_LEFT_FILL = af_blue_1_1_1 + 1,
AF_BLUE_STRING_CJK_LEFT_UNFILL = af_blue_1_1_1 + 77,
AF_BLUE_STRING_CJK_RIGHT_FILL = af_blue_1_1_1 + 153,
AF_BLUE_STRING_CJK_RIGHT_UNFILL = af_blue_1_1_1 + 229,
af_blue_1_2_1 = af_blue_1_1_1 + 304,
#else
af_blue_1_2_1 = af_blue_1_1_1 + 0,
#endif /* AF_CONFIG_OPTION_CJK_BLUE_HANI_VERT */
af_blue_1_2 = af_blue_1_2_1 + 0,
#else
af_blue_1_2 = af_blue_1_2_1 + 0,
#endif /* AF_CONFIG_OPTION_CJK */
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 script-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 ( 1 << 0 )
#define AF_BLUE_PROPERTY_LATIN_SMALL_TOP ( 1 << 1 )
#define AF_BLUE_PROPERTY_CJK_HORIZ ( 1 << 0 )
#define AF_BLUE_PROPERTY_CJK_TOP ( 1 << 1 )
#define AF_BLUE_PROPERTY_CJK_FILL ( 1 << 2 )
#define AF_BLUE_PROPERTY_CJK_RIGHT AF_BLUE_PROPERTY_CJK_TOP
#define AF_BLUE_STRINGSET_MAX_LEN 9
/* The AF_Blue_Stringset enumeration values are offsets into the */
/* `af_blue_stringsets' array. */
typedef enum AF_Blue_Stringset_
{
AF_BLUE_STRINGSET_LATN = 0,
af_blue_2_1 = 7,
#ifdef AF_CONFIG_OPTION_CJK
AF_BLUE_STRINGSET_HANI = af_blue_2_1 + 0,
af_blue_2_1_1 = af_blue_2_1 + 4,
#ifdef AF_CONFIG_OPTION_CJK_BLUE_HANI_VERT
af_blue_2_2_1 = af_blue_2_1_1 + 4,
#else
af_blue_2_2_1 = af_blue_2_1_1 + 0,
#endif /* AF_CONFIG_OPTION_CJK_BLUE_HANI_VERT */
af_blue_2_2 = af_blue_2_2_1 + 1,
#else
af_blue_2_2 = af_blue_2_2_1 + 0,
#endif /* AF_CONFIG_OPTION_CJK */
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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