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

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• Hash : f13516c8
  Author :
  Date : 2005-03-03T17:09:08
  

  Various fixes for C and C++ compiling. * src/autofit/*: Add copyright messages. Formatting. * src/autofit/afhints.c (af_glyph_hints_done): Don't use `AF_Dimension' but `int' for loop counter. * src/autofit/aflatin.c (af_latin_metrics_init_widths): Don't use `AF_Dimension' but `int' for loop counter. Use proper enumeration value for `render_mode'. (af_latin_metrics_scale_dim): Don't shadow variables. (af_latin_hints_compute_segments): Use proper cast for `major_dir' and `segment_dir'. (af_latin_align_linked_edge, af_latin_hint_edges): Fix arguments of call to `af_latin_compute_stem_width'. (af_latin_hints_apply): Don't use `AF_Dimension' but `int' for loop counter. * src/base/ftdbgmem.c (ft_mem_table_get_source, FT_DumpMemory): Use proper cast for memory allocation. * src/cff/cffdrivr.c (cff_get_kerning): Use proper cast for initialization of `sfnt'. * src/sfnt/sfdriver.c: Include `ttkern.h'. * src/sfnt/ttkern.c (tt_face_get_kerning): Don't shadow variables. * src/truetype/ttgload.c: Include `ttpload.h'. * src/truetype/ttpload.c (tt_face_load_loca) [FT_OPTIMIZE_MEMORY]: Remove redundant variable.

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• src/autofit/aftypes.h

• /***************************************************************************/
  /*                                                                         */
  /*  aftypes.h                                                              */
  /*                                                                         */
  /*    Auto-fitter types (specification only).                              */
  /*                                                                         */
  /*  Copyright 2003, 2004, 2005 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.                                        */
  /*                                                                         */
  /***************************************************************************/
  
  
  /***************************************************************************
   *
   *  The auto-fitter is a complete rewrite of the old auto-hinter.
   *  Its main feature is the ability to differentiate between different
   *  scripts in order to apply language-specific rules.
   *
   *  The code has also been compartimentized into several entities that
   *  should make algorithmic experimentation easier than with the old
   *  code.
   *
   *  Finally, we get rid of the Catharon license, since this code is
   *  released under the FreeType one.
   *
   ***************************************************************************/
  
  
  #ifndef __AFTYPES_H__
  #define __AFTYPES_H__
  
  #include <ft2build.h>
  
  #include FT_FREETYPE_H
  #include FT_OUTLINE_H
  #include FT_INTERNAL_OBJECTS_H
  #include FT_INTERNAL_DEBUG_H
  
  
  FT_BEGIN_HEADER
  
    /*************************************************************************/
    /*************************************************************************/
    /*****                                                               *****/
    /*****                    D E B U G G I N G                          *****/
    /*****                                                               *****/
    /*************************************************************************/
    /*************************************************************************/
  
  #define xxAF_DEBUG
  
  #ifdef AF_DEBUG
  
  #include <stdio.h>
  
  #define AF_LOG( x )  printf x
  
  #else
  
  #define AF_LOG( x )  do ; while ( 0 )        /* nothing */
  
  #endif /* AF_DEBUG */
  
  
    /*************************************************************************/
    /*************************************************************************/
    /*****                                                               *****/
    /*****                 U T I L I T Y   S T U F F                     *****/
    /*****                                                               *****/
    /*************************************************************************/
    /*************************************************************************/
  
    typedef struct  AF_WidthRec_
    {
      FT_Pos  org;  /* original position/width in font units              */
      FT_Pos  cur;  /* current/scaled position/width in device sub-pixels */
      FT_Pos  fit;  /* current/fitted position/width in device sub-pixels */
  
    } AF_WidthRec, *AF_Width;
  
  
    FT_LOCAL( void )
    af_sort_pos( FT_UInt  count,
                 FT_Pos*  table );
  
    FT_LOCAL( void )
    af_sort_widths( FT_UInt   count,
                    AF_Width  widths );
  
  
    /*************************************************************************/
    /*************************************************************************/
    /*****                                                               *****/
    /*****                   A N G L E   T Y P E S                       *****/
    /*****                                                               *****/
    /*************************************************************************/
    /*************************************************************************/
  
    /*
     *  The auto-fitter doesn't need a very high angular accuracy;
     *  this allows us to speed up some computations considerably with a
     *  light Cordic algorithm (see afangles.c).
     */
  
    typedef FT_Int  AF_Angle;
  
  
  #define AF_ANGLE_PI   256
  #define AF_ANGLE_2PI  ( AF_ANGLE_PI * 2 )
  #define AF_ANGLE_PI2  ( AF_ANGLE_PI / 2 )
  #define AF_ANGLE_PI4  ( AF_ANGLE_PI / 4 )
  
  
    /*
     *  compute the angle of a given 2-D vector
     */
    FT_LOCAL( AF_Angle )
    af_angle_atan( FT_Pos  dx,
                   FT_Pos  dy );
  
  
    /*
     *  compute `angle2 - angle1'; the result is always within
     *  the range [-AF_ANGLE_PI .. AF_ANGLE_PI - 1]
     */
    FT_LOCAL( AF_Angle )
    af_angle_diff( AF_Angle  angle1,
                   AF_Angle  angle2 );
  
  
    /*************************************************************************/
    /*************************************************************************/
    /*****                                                               *****/
    /*****                    O U T L I N E S                            *****/
    /*****                                                               *****/
    /*************************************************************************/
    /*************************************************************************/
  
    /*  opaque handle to glyph-specific hints -- see `afhints.h' for more
     *  details
     */
    typedef struct AF_GlyphHintsRec_*  AF_GlyphHints;
  
    /*  This structure is used to model an input glyph outline to
     *  the auto-hinter.  The latter will set the `hints' field
     *  depending on the glyph's script.
     */
    typedef struct  AF_OutlineRec_
    {
      FT_Face        face;
      FT_Outline     outline;
      FT_UInt        outline_resolution;
  
      FT_Int         advance;
      FT_UInt        metrics_resolution;
  
      AF_GlyphHints  hints;
  
    } AF_OutlineRec;
  
  
    /*************************************************************************/
    /*************************************************************************/
    /*****                                                               *****/
    /*****                       S C A L E R S                           *****/
    /*****                                                               *****/
    /*************************************************************************/
    /*************************************************************************/
  
    /*
     *  A scaler models the target pixel device that will receive the
     *  auto-hinted glyph image.
     */
  
    typedef enum
    {
      AF_SCALER_FLAG_NO_HORIZONTAL = 1,  /* disable horizontal hinting */
      AF_SCALER_FLAG_NO_VERTICAL   = 2,  /* disable vertical hinting   */
      AF_SCALER_FLAG_NO_ADVANCE    = 4   /* disable advance hinting    */
  
    } AF_ScalerFlags;
  
  
    typedef struct  AF_ScalerRec_
    {
      FT_Face         face;        /* source font face                        */
      FT_Fixed        x_scale;     /* from font units to 1/64th device pixels */
      FT_Fixed        y_scale;     /* from font units to 1/64th device pixels */
      FT_Pos          x_delta;     /* in 1/64th device pixels                 */
      FT_Pos          y_delta;     /* in 1/64th device pixels                 */
      FT_Render_Mode  render_mode; /* monochrome, anti-aliased, LCD, etc.     */
      FT_UInt32       flags;       /* additional control flags, see above     */
  
    } AF_ScalerRec, *AF_Scaler;
  
  
  #define AF_SCALER_EQUAL_SCALES( a, b )      \
            ( (a)->x_scale == (b)->x_scale && \
              (a)->y_scale == (b)->y_scale && \
              (a)->x_delta == (b)->x_delta && \
              (a)->y_delta == (b)->y_delta )
  
  
    /*************************************************************************/
    /*************************************************************************/
    /*****                                                               *****/
    /*****                       S C R I P T S                           *****/
    /*****                                                               *****/
    /*************************************************************************/
    /*************************************************************************/
  
    /*
     *  The list of know scripts.  Each different script corresponds to the
     *  following information:
     *
     *   - A set of Unicode ranges to test whether the face supports the
     *     script.
     *
     *   - A specific global analyzer that will compute global metrics
     *     specific to the script.
     *
     *   - A specific glyph analyzer that will compute segments and
     *     edges for each glyph covered by the script.
     *
     *   - A specific grid-fitting algorithm that will distort the
     *     scaled glyph outline according to the results of the glyph
     *     analyzer.
     *
     *  Note that a given analyzer and/or grid-fitting algorithm can be
     *  used by more than one script.
     */
  
    typedef enum
    {
      AF_SCRIPT_NONE  = 0,
      AF_SCRIPT_LATIN = 1,
      /* add new scripts here.  Don't forget to update the list in */
      /* `afglobal.c'.                                             */
  
      AF_SCRIPT_MAX   /* do not remove */
  
    } AF_Script;
  
  
    typedef struct AF_ScriptClassRec_ const*  AF_ScriptClass;
  
    typedef struct  AF_ScriptMetricsRec_
    {
      AF_ScriptClass  clazz;
      AF_ScalerRec    scaler;
  
    } AF_ScriptMetricsRec, *AF_ScriptMetrics;
  
  
    /*  This function parses an FT_Face to compute global metrics for
     *  a specific script.
     */
    typedef FT_Error
    (*AF_Script_InitMetricsFunc)( AF_ScriptMetrics  metrics,
                                  FT_Face           face );
  
    typedef void
    (*AF_Script_ScaleMetricsFunc)( AF_ScriptMetrics  metrics,
                                   AF_Scaler         scaler );
  
    typedef void
    (*AF_Script_DoneMetricsFunc)( AF_ScriptMetrics  metrics );
  
  
    typedef FT_Error
    (*AF_Script_InitHintsFunc)( AF_GlyphHints     hints,
                                AF_ScriptMetrics  metrics );
  
    typedef void
    (*AF_Script_ApplyHintsFunc)( AF_GlyphHints     hints,
                                 FT_Outline*       outline,
                                 AF_ScriptMetrics  metrics );
  
  
    typedef struct  AF_Script_UniRangeRec_
    {
      FT_UInt32  first;
      FT_UInt32  last;
  
    } AF_Script_UniRangeRec;
  
    typedef const AF_Script_UniRangeRec  *AF_Script_UniRange;
  
  
    typedef struct  AF_ScriptClassRec_
    {
      AF_Script                   script;
      AF_Script_UniRange          script_uni_ranges; /* last must be { 0, 0 } */
  
      FT_UInt                     script_metrics_size;
      AF_Script_InitMetricsFunc   script_metrics_init;
      AF_Script_ScaleMetricsFunc  script_metrics_scale;
      AF_Script_DoneMetricsFunc   script_metrics_done;
  
      AF_Script_InitHintsFunc     script_hints_init;
      AF_Script_ApplyHintsFunc    script_hints_apply;
  
    } AF_ScriptClassRec;
  
  
  /* */
  
  FT_END_HEADER
  
  #endif /* __AFTYPES_H__ */
  
  
  /* END */
  

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