godot/thirdparty/freetype/src/pshinter/pshglob.c

/****************************************************************************
 *
 * pshglob.c
 *
 *   PostScript hinter global hinting management (body).
 *   Inspired by the new auto-hinter module.
 *
 * 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.
 *
 */


#include <freetype/freetype.h>
#include <freetype/internal/ftobjs.h>
#include <freetype/internal/ftcalc.h>
#include "pshglob.h"

#ifdef DEBUG_HINTER
  PSH_Globals  ps_debug_globals = NULL;
#endif


  /*************************************************************************/
  /*************************************************************************/
  /*****                                                               *****/
  /*****                       STANDARD WIDTHS                         *****/
  /*****                                                               *****/
  /*************************************************************************/
  /*************************************************************************/


  /* scale the widths/heights table */
  static void
  psh_globals_scale_widths( PSH_Globals  globals,
                            FT_UInt      direction )
  { … }


#if 0

  /* org_width is in font units, result in device pixels, 26.6 format */
  FT_LOCAL_DEF( FT_Pos )
  psh_dimension_snap_width( PSH_Dimension  dimension,
                            FT_Int         org_width )
  {
    FT_UInt  n;
    FT_Pos   width     = FT_MulFix( org_width, dimension->scale_mult );
    FT_Pos   best      = 64 + 32 + 2;
    FT_Pos   reference = width;


    for ( n = 0; n < dimension->stdw.count; n++ )
    {
      FT_Pos  w;
      FT_Pos  dist;


      w = dimension->stdw.widths[n].cur;
      dist = width - w;
      if ( dist < 0 )
        dist = -dist;
      if ( dist < best )
      {
        best      = dist;
        reference = w;
      }
    }

    if ( width >= reference )
    {
      width -= 0x21;
      if ( width < reference )
        width = reference;
    }
    else
    {
      width += 0x21;
      if ( width > reference )
        width = reference;
    }

    return width;
  }

#endif /* 0 */


  /*************************************************************************/
  /*************************************************************************/
  /*****                                                               *****/
  /*****                       BLUE ZONES                              *****/
  /*****                                                               *****/
  /*************************************************************************/
  /*************************************************************************/

  static void
  psh_blues_set_zones_0( PSH_Blues       target,
                         FT_Bool         is_others,
                         FT_UInt         read_count,
                         FT_Short*       read,
                         PSH_Blue_Table  top_table,
                         PSH_Blue_Table  bot_table )
  { … }


  /* Re-read blue zones from the original fonts and store them into our */
  /* private structure.  This function re-orders, sanitizes, and        */
  /* fuzz-expands the zones as well.                                    */
  static void
  psh_blues_set_zones( PSH_Blues  target,
                       FT_UInt    count,
                       FT_Short*  blues,
                       FT_UInt    count_others,
                       FT_Short*  other_blues,
                       FT_Int     fuzz,
                       FT_Int     family )
  { … }


  /* reset the blues table when the device transform changes */
  static void
  psh_blues_scale_zones( PSH_Blues  blues,
                         FT_Fixed   scale,
                         FT_Pos     delta )
  { … }


  /* calculate the maximum height of given blue zones */
  static FT_Short
  psh_calc_max_height( FT_UInt          num,
                       const FT_Short*  values,
                       FT_Short         cur_max )
  { … }


  FT_LOCAL_DEF( void )
  psh_blues_snap_stem( PSH_Blues      blues,
                       FT_Int         stem_top,
                       FT_Int         stem_bot,
                       PSH_Alignment  alignment )
  { … }


  /*************************************************************************/
  /*************************************************************************/
  /*****                                                               *****/
  /*****                        GLOBAL HINTS                           *****/
  /*****                                                               *****/
  /*************************************************************************/
  /*************************************************************************/

  static void
  psh_globals_destroy( PSH_Globals  globals )
  { … }


  static FT_Error
  psh_globals_new( FT_Memory     memory,
                   T1_Private*   priv,
                   PSH_Globals  *aglobals )
  { … }


  FT_LOCAL_DEF( void )
  psh_globals_set_scale( PSH_Globals  globals,
                         FT_Fixed     x_scale,
                         FT_Fixed     y_scale,
                         FT_Fixed     x_delta,
                         FT_Fixed     y_delta )
  { … }


  FT_LOCAL_DEF( void )
  psh_globals_funcs_init( PSH_Globals_FuncsRec*  funcs )
  { … }


/* END */