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

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• Hash : f546bacd
  Author :
  Date : 2004-02-01T16:59:06
  

  * src/sfnt/Jamfile: removing "ttcmap" from the list of sources * src/cache/*, include/freetype/cache/*: fixing a bug after heavy testing. The current sources are now "release candidates" for the final version of the cache sub-system * Jamfile: updating "refdoc" target, and adding "autohint" to the list of modules to build. Both the autohinter and autofitter will be built by default. But which one will be used is determined by the content of "ftmodule.h" * src/autofit/*: much updates, but the code is still buggy as hell. Aargh..

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• src/autofit/aftypes.h

• #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                                   *****/
   /*****                                                                *****/
   /**************************************************************************/
   /**************************************************************************/
  
    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                           *****/
   /*****                                                                *****/
   /**************************************************************************/
   /**************************************************************************/
  
   /*
    *  Angle type. The auto-fitter doesn't need a very high angular accuracy,
    *  and 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     128
  #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 );
  
  
   /*
    *  computes "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;        /* additionnal control flags, see above    */
  
    } AF_ScalerRec, *AF_Scaler;
  
  
  
   /**************************************************************************/
   /**************************************************************************/
   /*****                                                                *****/
   /*****                S C R I P T S                                   *****/
   /*****                                                                *****/
   /**************************************************************************/
   /**************************************************************************/
  
   /*
    *  the list of know scripts. Each different script correspond to the
    *  following information:
    *
    *   - a set of Unicode ranges to test weither 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_LATIN = 0,
      /* 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_ScriptMetricsRec, *AF_ScriptMetrics;
  
  
   /* this function parses a 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,
                                                  FT_Outline*       outline,
                                                  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__ */
  

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