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

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• Hash : e664efad
  Author :
  Date : 2004-06-04T17:41:59
  

          * src/autofit/*: important fixes to the auto-fitter. The output
          now seems to be 100% equivalent to the auto-hinter, while being
          about 2% faster (which proves that script-specific algorithm
          selection isn't a performance problem).
  
          to test it, change "autohint" to "autofit" in
          <freetype/config/ftmodule.h> and recompile.
  
          a few more testing is needed before making this the official
          auto-hinting module
  

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• src/autofit/aflatin.h

• #ifndef __AFLATIN_H__
  #define __AFLATIN_H__
  
  #include "afhints.h"
  
  FT_BEGIN_HEADER
  
   /*
    * the latin-specific script class
    *
    */
    FT_LOCAL( const AF_ScriptClassRec )    af_latin_script_class;
  
   /***************************************************************************/
   /***************************************************************************/
   /*****                                                                 *****/
   /*****       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've been made semi-public to allow alternate script hinters to
    * re-use some of them
    */
  
   /*
    *  Latin (global) metrics management
    *
    */
  
    enum
    {
      AF_LATIN_BLUE_CAPITAL_TOP,
      AF_LATIN_BLUE_CAPITAL_BOTTOM,
      AF_LATIN_BLUE_SMALL_F_TOP,
      AF_LATIN_BLUE_SMALL_TOP,
      AF_LATIN_BLUE_SMALL_BOTTOM,
      AF_LATIN_BLUE_SMALL_MINOR,
  
      AF_LATIN_BLUE_MAX
    };
  
  #define AF_LATIN_IS_TOP_BLUE( b )  ( (b) == AF_LATIN_BLUE_CAPITAL_TOP || \
                                       (b) == AF_LATIN_BLUE_SMALL_F_TOP || \
                                       (b) == AF_LATIN_BLUE_SMALL_TOP   )
  
  #define  AF_LATIN_MAX_WIDTHS     16
  #define  AF_LATIN_MAX_BLUES      AF_LATIN_BLUE_MAX
  
    enum
    {
      AF_LATIN_BLUE_ACTIVE     = (1 << 0),
      AF_LATIN_BLUE_TOP        = (1 << 1),
      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;
      AF_WidthRec      widths[ AF_LATIN_MAX_WIDTHS ];
      FT_Pos           edge_distance_threshold;
  
     /* ignored for horizontal metrics */
      FT_Bool          control_overshoot;
      FT_UInt          blue_count;
      AF_LatinBlueRec  blues[ AF_LATIN_BLUE_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 );
  
  
  
   /***************************************************************************/
   /***************************************************************************/
   /*****                                                                 *****/
   /*****            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)
  
  
   /* this shouldn't normally be exported. However, other scripts might
    * like to use this function as-is
    */
    FT_LOCAL( void )
    af_latin_hints_compute_segments( AF_GlyphHints  hints,
                                     AF_Dimension   dim );
  
   /* this shouldn't normally be exported. However, other scripts might
    * want to use this function as-is
    */
    FT_LOCAL( void )
    af_latin_hints_link_segments( AF_GlyphHints  hints,
                                  AF_Dimension   dim );
  
   /* this shouldn't normally be exported. However, other scripts might
    * want to use this function as-is
    */
    FT_LOCAL( void )
    af_latin_hints_compute_edges( AF_GlyphHints  hints,
                                  AF_Dimension   dim );
  
    FT_LOCAL( void )
    af_latin_hints_detect_features( AF_GlyphHints  hints,
                                    AF_Dimension   dim );
  
  /* */
  
  FT_END_HEADER
  
  #endif /* __AFLATIN_H__ */
  

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