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

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• Hash : 5a4c5a5b
  Author :
  Date : 2013-09-22T22:37:26
  

  [autofit] Disunify Cyrillic and Greek handling from Latin. * src/autofit/afscript.h: Add Cyrillic and Greek. * src/autofit/afblue.dat (AF_BLUE_STRINGSET_GREK, AF_BLUE_STRINGSET_CYRL): Add blue zones for Greek and Cyrillic. (AF_BLUE_STRINGSET_LATN): Fix typo. * src/autofit/afblue.c, src/autofit/afblue.h: Regenerated. * src/autofit/aflatin.c (af_grek_uniranges, af_cyrl_uniranges): New arrays. (af_grek_script_class, af_cyrl_script_class): New scripts. * src/autofit/aflatin.h: Updated.

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• src/autofit/aflatin.h

• /***************************************************************************/
  /*                                                                         */
  /*  aflatin.h                                                              */
  /*                                                                         */
  /*    Auto-fitter hinting routines for latin script (specification).       */
  /*                                                                         */
  /*  Copyright 2003-2007, 2009, 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 __AFLATIN_H__
  #define __AFLATIN_H__
  
  #include "afhints.h"
  
  
  FT_BEGIN_HEADER
  
    /* the `latin' writing system */
  
    AF_DECLARE_WRITING_SYSTEM_CLASS( af_latin_writing_system_class )
  
  
    /* the latin-specific script classes */
  
    AF_DECLARE_SCRIPT_CLASS( af_cyrl_script_class )
    AF_DECLARE_SCRIPT_CLASS( af_grek_script_class )
    AF_DECLARE_SCRIPT_CLASS( af_latn_script_class )
    AF_DECLARE_SCRIPT_CLASS( af_hebr_script_class )
  #if 0
    AF_DECLARE_SCRIPT_CLASS( af_armn_script_class )
  #endif
  
  
    /* constants are given with units_per_em == 2048 in mind */
  #define AF_LATIN_CONSTANT( metrics, c )                                      \
    ( ( (c) * (FT_Long)( (AF_LatinMetrics)(metrics) )->units_per_em ) / 2048 )
  
  
    /*************************************************************************/
    /*************************************************************************/
    /*****                                                               *****/
    /*****            L A T I N   G L O B A L   M E T R I C S            *****/
    /*****                                                               *****/
    /*************************************************************************/
    /*************************************************************************/
  
  
    /*
     *  The following declarations could be embedded in the file `aflatin.c';
     *  they have been made semi-public to allow alternate script hinters to
     *  re-use some of them.
     */
  
  
  #define AF_LATIN_IS_TOP_BLUE( b ) \
            ( (b)->properties & AF_BLUE_PROPERTY_LATIN_TOP )
  #define AF_LATIN_IS_SMALL_TOP_BLUE( b ) \
            ( (b)->properties & AF_BLUE_PROPERTY_LATIN_SMALL_TOP )
  #define AF_LATIN_IS_LONG_BLUE( b ) \
            ( (b)->properties & AF_BLUE_PROPERTY_LATIN_LONG )
  
  #define AF_LATIN_MAX_WIDTHS  16
  
  
    enum
    {
      AF_LATIN_BLUE_ACTIVE     = 1 << 0,  /* set if zone height is <= 3/4px */
      AF_LATIN_BLUE_TOP        = 1 << 1,  /* result of AF_LATIN_IS_TOP_BLUE */
      AF_LATIN_BLUE_ADJUSTMENT = 1 << 2,  /* used for scale adjustment      */
                                          /* optimization                   */
      AF_LATIN_BLUE_FLAG_MAX
    };
  
  
    typedef struct  AF_LatinBlueRec_
    {
      AF_WidthRec  ref;
      AF_WidthRec  shoot;
      FT_UInt      flags;
  
    } AF_LatinBlueRec, *AF_LatinBlue;
  
  
    typedef struct  AF_LatinAxisRec_
    {
      FT_Fixed         scale;
      FT_Pos           delta;
  
      FT_UInt          width_count;                 /* number of used widths */
      AF_WidthRec      widths[AF_LATIN_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? */
  
      /* ignored for horizontal metrics */
      FT_UInt          blue_count;
      AF_LatinBlueRec  blues[AF_BLUE_STRINGSET_MAX];
  
      FT_Fixed         org_scale;
      FT_Pos           org_delta;
  
    } AF_LatinAxisRec, *AF_LatinAxis;
  
  
    typedef struct  AF_LatinMetricsRec_
    {
      AF_ScriptMetricsRec  root;
      FT_UInt              units_per_em;
      AF_LatinAxisRec      axis[AF_DIMENSION_MAX];
  
    } AF_LatinMetricsRec, *AF_LatinMetrics;
  
  
    FT_LOCAL( FT_Error )
    af_latin_metrics_init( AF_LatinMetrics  metrics,
                           FT_Face          face );
  
    FT_LOCAL( void )
    af_latin_metrics_scale( AF_LatinMetrics  metrics,
                            AF_Scaler        scaler );
  
    FT_LOCAL( void )
    af_latin_metrics_init_widths( AF_LatinMetrics  metrics,
                                  FT_Face          face );
  
    FT_LOCAL( void )
    af_latin_metrics_check_digits( AF_LatinMetrics  metrics,
                                   FT_Face          face );
  
  
    /*************************************************************************/
    /*************************************************************************/
    /*****                                                               *****/
    /*****           L A T I N   G L Y P H   A N A L Y S I S             *****/
    /*****                                                               *****/
    /*************************************************************************/
    /*************************************************************************/
  
    enum
    {
      AF_LATIN_HINTS_HORZ_SNAP   = 1 << 0, /* enable stem width snapping  */
      AF_LATIN_HINTS_VERT_SNAP   = 1 << 1, /* enable stem height snapping */
      AF_LATIN_HINTS_STEM_ADJUST = 1 << 2, /* enable stem width/height    */
                                           /* adjustment                  */
      AF_LATIN_HINTS_MONO        = 1 << 3  /* indicate monochrome         */
                                           /* rendering                   */
    };
  
  
  #define AF_LATIN_HINTS_DO_HORZ_SNAP( h )             \
    AF_HINTS_TEST_OTHER( h, AF_LATIN_HINTS_HORZ_SNAP )
  
  #define AF_LATIN_HINTS_DO_VERT_SNAP( h )             \
    AF_HINTS_TEST_OTHER( h, AF_LATIN_HINTS_VERT_SNAP )
  
  #define AF_LATIN_HINTS_DO_STEM_ADJUST( h )             \
    AF_HINTS_TEST_OTHER( h, AF_LATIN_HINTS_STEM_ADJUST )
  
  #define AF_LATIN_HINTS_DO_MONO( h )             \
    AF_HINTS_TEST_OTHER( h, AF_LATIN_HINTS_MONO )
  
  
    /*
     *  The next functions shouldn't normally be exported.  However, other
     *  scripts might like to use these functions as-is.
     */
    FT_LOCAL( FT_Error )
    af_latin_hints_compute_segments( AF_GlyphHints  hints,
                                     AF_Dimension   dim );
  
    FT_LOCAL( void )
    af_latin_hints_link_segments( AF_GlyphHints  hints,
                                  AF_Dimension   dim );
  
    FT_LOCAL( FT_Error )
    af_latin_hints_compute_edges( AF_GlyphHints  hints,
                                  AF_Dimension   dim );
  
    FT_LOCAL( FT_Error )
    af_latin_hints_detect_features( AF_GlyphHints  hints,
                                    AF_Dimension   dim );
  
  /* */
  
  FT_END_HEADER
  
  #endif /* __AFLATIN_H__ */
  
  
  /* END */
  

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