freetype2/src/pshinter/pshrec.h

/****************************************************************************
 *
 * pshrec.h
 *
 *   Postscript (Type1/Type2) hints recorder (specification).
 *
 * Copyright (C) 2001-2023 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 functions defined here are called from the Type 1, CID and CFF
   * font drivers to record the hints of a given character/glyph.
   *
   * The hints are recorded in a unified format, and are later processed
   * by the `optimizer' and `fitter' to adjust the outlines to the pixel
   * grid.
   *
   */


#ifndef PSHREC_H_
#define PSHREC_H_


#include <freetype/internal/pshints.h>
#include "pshglob.h"


FT_BEGIN_HEADER


  /*************************************************************************/
  /*************************************************************************/
  /*****                                                               *****/
  /*****                 GLYPH HINTS RECORDER INTERNALS                *****/
  /*****                                                               *****/
  /*************************************************************************/
  /*************************************************************************/

  /* handle to hint record */
  typedef struct PS_HintRec_*  PS_Hint;

  /* hint types */
  typedef enum  PS_Hint_Type_
  {
    PS_HINT_TYPE_1 = 1,
    PS_HINT_TYPE_2 = 2

  } PS_Hint_Type;


  /* hint flags */
#define PS_HINT_FLAG_GHOST   1U
#define PS_HINT_FLAG_BOTTOM  2U


  /* hint descriptor */
  typedef struct  PS_HintRec_
  {
    FT_Int   pos;
    FT_Int   len;
    FT_UInt  flags;

  } PS_HintRec;


#define ps_hint_is_active( x )  ( (x)->flags & PS_HINT_FLAG_ACTIVE )
#define ps_hint_is_ghost( x )   ( (x)->flags & PS_HINT_FLAG_GHOST  )
#define ps_hint_is_bottom( x )  ( (x)->flags & PS_HINT_FLAG_BOTTOM )


  /* hints table descriptor */
  typedef struct  PS_Hint_TableRec_
  {
    FT_UInt  num_hints;
    FT_UInt  max_hints;
    PS_Hint  hints;

  } PS_Hint_TableRec, *PS_Hint_Table;


  /* hint and counter mask descriptor */
  typedef struct  PS_MaskRec_
  {
    FT_UInt   num_bits;
    FT_UInt   max_bits;
    FT_Byte*  bytes;
    FT_UInt   end_point;

  } PS_MaskRec, *PS_Mask;


  /* masks and counters table descriptor */
  typedef struct  PS_Mask_TableRec_
  {
    FT_UInt  num_masks;
    FT_UInt  max_masks;
    PS_Mask  masks;

  } PS_Mask_TableRec, *PS_Mask_Table;


 /* dimension-specific hints descriptor */
  typedef struct  PS_DimensionRec_
  {
    PS_Hint_TableRec  hints;
    PS_Mask_TableRec  masks;
    PS_Mask_TableRec  counters;

  } PS_DimensionRec, *PS_Dimension;


  /* glyph hints descriptor                                */
  /* dimension 0 => X coordinates + vertical hints/stems   */
  /* dimension 1 => Y coordinates + horizontal hints/stems */
  typedef struct  PS_HintsRec_
  {
    FT_Memory        memory;
    FT_Error         error;
    FT_UInt32        magic;
    PS_Hint_Type     hint_type;
    PS_DimensionRec  dimension[2];

  } PS_HintsRec, *PS_Hints;

  /* */

  /* initialize hints recorder */
  FT_LOCAL( void )
  ps_hints_init( PS_Hints   hints,
                 FT_Memory  memory );

  /* finalize hints recorder */
  FT_LOCAL( void )
  ps_hints_done( PS_Hints  hints );

  /* initialize Type1 hints recorder interface */
  FT_LOCAL( void )
  t1_hints_funcs_init( T1_Hints_FuncsRec*  funcs );

  /* initialize Type2 hints recorder interface */
  FT_LOCAL( void )
  t2_hints_funcs_init( T2_Hints_FuncsRec*  funcs );


#ifdef DEBUG_HINTER
  extern PS_Hints  ps_debug_hints;
  extern  int      ps_debug_no_horz_hints;
  extern  int      ps_debug_no_vert_hints;
#endif

 /* */


FT_END_HEADER


#endif /* PSHREC_H_ */


/* END */