kc3-lang/freetype/src/autofit/afcjk.h

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• Hash : c1eb4459
  Author :
  Date : 2013-08-25T19:47:26
  

  [autofit] Make `cjk' module use blue stringsets. * src/autofit/afcjk.c (AF_CJK_MAX_TEST_CHARACTERS): Removed. (af_cjk_hani_blue_chars): Removed. (AF_CJK_BLUE_TYPE_*): Removed. (af_cjk_metrics_init_blues): Replace AF_CJK_MAX_TEST_CHARACTERS with AF_BLUE_STRING_MAX_LEN. Change loops to use offsets (in file `afblue.h') into the new arrays `af_blue_stringsets' and `af_blue_strings' (in file `afblue.c'). Instead of three dimensions (as used in the old blue string array) we now use properties to do the same, saving one loop nesting level. * src/autofit/afcjk.h: Remove old enumeration values superseded by the new data in `afblue.h'. (AF_CJK_IS_TOP_BLUE, AF_CJK_IS_HORIZ_BLUE, AF_CJK_IS_FILLED_BLUE, AF_CJK_IS_RIGHT_BLUE): New macros, to be used in `af_cjk_metrics_init_blues'. (AF_CJK_BLUE_IS_RIGHT): Remove this now redundant enum value. (AF_CJK_BLUE_IS_TOP): Renamed to... (AF_CJK_BLUE_TOP): This. (AF_CJK_MAX_BLUES): Remove. (AF_CJKAxisRec): Updated.

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• src/autofit/afcjk.h

• /***************************************************************************/
  /*                                                                         */
  /*  afcjk.h                                                                */
  /*                                                                         */
  /*    Auto-fitter hinting routines for CJK script (specification).         */
  /*                                                                         */
  /*  Copyright 2006, 2007, 2011-2013 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 __AFCJK_H__
  #define __AFCJK_H__
  
  #include "afhints.h"
  #include "aflatin.h"
  
  
  FT_BEGIN_HEADER
  
  
    /* the CJK-specific writing system */
  
    AF_DECLARE_WRITING_SYSTEM_CLASS( af_cjk_writing_system_class )
  
  
    /* the CJK-specific script classes */
  
    AF_DECLARE_SCRIPT_CLASS( af_hani_script_class )
  
  
    /*************************************************************************/
    /*************************************************************************/
    /*****                                                               *****/
    /*****              C J K   G L O B A L   M E T R I C S              *****/
    /*****                                                               *****/
    /*************************************************************************/
    /*************************************************************************/
  
  
    /*
     *  CJK glyphs tend to fill the square.  So we have both vertical and
     *  horizontal blue zones.  But some glyphs have flat bounding strokes that
     *  leave some space between neighbour glyphs.
     */
  
  #define AF_CJK_IS_TOP_BLUE( b ) \
            ( (b)->properties & AF_BLUE_PROPERTY_CJK_TOP )
  #define AF_CJK_IS_HORIZ_BLUE( b ) \
            ( (b)->properties & AF_BLUE_PROPERTY_CJK_HORIZ )
  #define AF_CJK_IS_FILLED_BLUE( b ) \
            ( (b)->properties & AF_BLUE_PROPERTY_CJK_FILL )
  #define AF_CJK_IS_RIGHT_BLUE  AF_CJK_IS_TOP_BLUE
  
  #define AF_CJK_MAX_WIDTHS  16
  
  
    enum
    {
      AF_CJK_BLUE_ACTIVE     = 1 << 0,  /* set if zone height is <= 3/4px */
      AF_CJK_BLUE_TOP        = 1 << 1,  /* result of AF_CJK_IS_TOP_BLUE   */
      AF_CJK_BLUE_ADJUSTMENT = 1 << 2,  /* used for scale adjustment      */
                                        /* optimization                   */
      AF_CJK_BLUE_FLAG_MAX
    };
  
  
    typedef struct  AF_CJKBlueRec_
    {
      AF_WidthRec  ref;
      AF_WidthRec  shoot; /* undershoot */
      FT_UInt      flags;
  
    } AF_CJKBlueRec, *AF_CJKBlue;
  
  
    typedef struct  AF_CJKAxisRec_
    {
      FT_Fixed       scale;
      FT_Pos         delta;
  
      FT_UInt        width_count;                   /* number of used widths */
      AF_WidthRec    widths[AF_CJK_MAX_WIDTHS];     /* widths array          */
      FT_Pos         edge_distance_threshold;     /* used for creating edges */
      FT_Pos         standard_width;           /* the default stem thickness */
      FT_Bool        extra_light;           /* is standard width very light? */
  
      /* used for horizontal metrics too for CJK */
      FT_Bool        control_overshoot;
      FT_UInt        blue_count;
      AF_CJKBlueRec  blues[AF_BLUE_STRINGSET_MAX];
  
      FT_Fixed       org_scale;
      FT_Pos         org_delta;
  
    } AF_CJKAxisRec, *AF_CJKAxis;
  
  
    typedef struct  AF_CJKMetricsRec_
    {
      AF_ScriptMetricsRec  root;
      FT_UInt              units_per_em;
      AF_CJKAxisRec        axis[AF_DIMENSION_MAX];
  
    } AF_CJKMetricsRec, *AF_CJKMetrics;
  
  
  #ifdef AF_CONFIG_OPTION_CJK
    FT_LOCAL( FT_Error )
    af_cjk_metrics_init( AF_CJKMetrics  metrics,
                         FT_Face        face );
  
    FT_LOCAL( void )
    af_cjk_metrics_scale( AF_CJKMetrics  metrics,
                          AF_Scaler      scaler );
  
    FT_LOCAL( FT_Error )
    af_cjk_hints_init( AF_GlyphHints  hints,
                       AF_CJKMetrics  metrics );
  
    FT_LOCAL( FT_Error )
    af_cjk_hints_apply( AF_GlyphHints  hints,
                        FT_Outline*    outline,
                        AF_CJKMetrics  metrics );
  
    /* shared; called from afindic.c */
    FT_LOCAL( void )
    af_cjk_metrics_check_digits( AF_CJKMetrics  metrics,
                                 FT_Face        face );
  
    FT_LOCAL( void )
    af_cjk_metrics_init_widths( AF_CJKMetrics  metrics,
                                FT_Face        face );
  #endif /* AF_CONFIG_OPTION_CJK */
  
  
  /* */
  
  FT_END_HEADER
  
  #endif /* __AFCJK_H__ */
  
  
  /* END */
  

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