kc3-lang/freetype/src/autofit/afblue.hin

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• Hash : 3f542498
  Author :
  Date : 2013-09-11T23:08:31
  

  [autofit] Improve Hebrew rendering. This change introduces a new blue zone property `AF_BLUE_PROPERTY_LATIN_LONG' to make the auto-hinter ignore short top segments. * src/autofit/afblue.dat: Fix Hebrew blue strings. Use AF_BLUE_PROPERTY_LATIN_LONG for AF_BLUE_STRING_HEBREW_TOP. * src/autofit/afblue.hin (AF_BLUE_PROPERTY_LATIN_LONG): New macro. * src/autofit/afblue.c, src/autofit/afblue.h: Updated. * src/autofit/aflatin.c (af_latin_metrics_init_blues): Handle `AF_LATIN_IS_LONG_BLUE'. * src/autofit/aflatin.h (AF_LATIN_IS_LONG_BLUE): New macro.

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• src/autofit/afblue.hin

• /***************************************************************************/
  /*                                                                         */
  /*  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 = (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 ); \
            }
  
  
    /*************************************************************************/
    /*************************************************************************/
    /*****                                                               *****/
    /*****                    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 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_LATIN_LONG       ( 1 << 2 )
  
  #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  @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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