kc3-lang/freetype/src/pfr/pfrcmap.c

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• Hash : 9a966b7d
  Author :
  Date : 2007-10-15T17:21:32
  

  Add support for cmap type 14. * devel/ftoption.h, include/freetype/config/ftoption.h (TT_CONFIG_CMAP_FORMAT_14): New macro. * include/freetype/internal/ftobjs.h (FT_CMap_CharVarIndexFunc, FT_CMap_CharVarIsDefaultFunc, FT_CMap_VariantListFunc, FT_CMap_CharVariantListFunc, FT_CMap_VariantCharListFunc): New support function prototypes. (FT_CMap_ClassRec): Add them. Update all users. * include/freetype/ttnameid.h (TT_APPLE_ID_VARIANT_SELECTOR): New macro. * include/freetype/freetype.h (FT_Get_Char_Variant_Index, FT_Get_Char_Variant_IsDefault, FT_Get_Variant_Selectors, FT_Get_Variants_Of_Char, FT_Get_Chars_Of_Variant): New API functions. * src/base/ftobjs.c (find_variant_selector_charmap): New auxiliary function. (FT_Set_Charmap): Disallow cmaps of type 14. (FT_Get_Char_Variant_Index, FT_Get_Char_Variant_IsDefault, FT_Get_Variant_Selectors, FT_Get_Variants_Of_Char, FT_Get_Chars_Of_Variant): New API functions. * src/sfnt/ttcmap.c (TT_PEEK_UINT24, TT_NEXT_UINT24): New macros. (TT_CMap14Rec, tt_cmap14_init, tt_cmap14_validate, tt_cmap14_char_index, tt_cmap14_char_next, tt_cmap14_get_info, tt_cmap14_char_map_def_binary, tt_cmap14_char_map_nondef_binary, tt_cmap14_find_variant, tt_cmap14_char_var_index, tt_cmap14_char_var_isdefault, tt_cmap14_variants, tt_cmap14_char_variants, tt_cmap14_def_char_count, tt_cmap14_get_def_chars, tt_cmap14_get_nondef_chars, tt_cmap14_variant_chars, tt_cmap14_class_rec): New functions and structures for cmap 14 support. (tt_cmap_classes): Register tt_cmap14_class_rec. (tt_face_build_cmaps): One more error message. * docs/CHANGES: Mention cmap 14 support.

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• src/pfr/pfrcmap.c

• /***************************************************************************/
  /*                                                                         */
  /*  pfrcmap.c                                                              */
  /*                                                                         */
  /*    FreeType PFR cmap handling (body).                                   */
  /*                                                                         */
  /*  Copyright 2002, 2007 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 "pfrcmap.h"
  #include "pfrobjs.h"
  #include FT_INTERNAL_DEBUG_H
  
  #include "pfrerror.h"
  
  
    FT_CALLBACK_DEF( FT_Error )
    pfr_cmap_init( PFR_CMap  cmap )
    {
      FT_Error  error = PFR_Err_Ok;
      PFR_Face  face  = (PFR_Face)FT_CMAP_FACE( cmap );
  
  
      cmap->num_chars = face->phy_font.num_chars;
      cmap->chars     = face->phy_font.chars;
  
      /* just for safety, check that the character entries are correctly */
      /* sorted in increasing character code order                       */
      {
        FT_UInt  n;
  
  
        for ( n = 1; n < cmap->num_chars; n++ )
        {
          if ( cmap->chars[n - 1].char_code >= cmap->chars[n].char_code )
          {
            error = PFR_Err_Invalid_Table;
            goto Exit;
          }
        }
      }
  
    Exit:
      return error;
    }
  
  
    FT_CALLBACK_DEF( void )
    pfr_cmap_done( PFR_CMap  cmap )
    {
      cmap->chars     = NULL;
      cmap->num_chars = 0;
    }
  
  
    FT_CALLBACK_DEF( FT_UInt )
    pfr_cmap_char_index( PFR_CMap   cmap,
                         FT_UInt32  char_code )
    {
      FT_UInt   min = 0;
      FT_UInt   max = cmap->num_chars;
      FT_UInt   mid;
      PFR_Char  gchar;
  
  
      while ( min < max )
      {
        mid   = min + ( max - min ) / 2;
        gchar = cmap->chars + mid;
  
        if ( gchar->char_code == char_code )
          return mid + 1;
  
        if ( gchar->char_code < char_code )
          min = mid + 1;
        else
          max = mid;
      }
      return 0;
    }
  
  
    FT_CALLBACK_DEF( FT_UInt )
    pfr_cmap_char_next( PFR_CMap    cmap,
                        FT_UInt32  *pchar_code )
    {
      FT_UInt    result    = 0;
      FT_UInt32  char_code = *pchar_code + 1;
  
  
    Restart:
      {
        FT_UInt   min = 0;
        FT_UInt   max = cmap->num_chars;
        FT_UInt   mid;
        PFR_Char  gchar;
  
  
        while ( min < max )
        {
          mid   = min + ( ( max - min ) >> 1 );
          gchar = cmap->chars + mid;
  
          if ( gchar->char_code == char_code )
          {
            result = mid;
            if ( result != 0 )
            {
              result++;
              goto Exit;
            }
  
            char_code++;
            goto Restart;
          }
  
          if ( gchar->char_code < char_code )
            min = mid+1;
          else
            max = mid;
        }
  
        /* we didn't find it, but we have a pair just above it */
        char_code = 0;
  
        if ( min < cmap->num_chars )
        {
          gchar  = cmap->chars + min;
          result = min;
          if ( result != 0 )
          {
            result++;
            char_code = gchar->char_code;
          }
        }
      }
  
    Exit:
      *pchar_code = char_code;
      return result;
    }
  
  
    FT_CALLBACK_TABLE_DEF const FT_CMap_ClassRec
    pfr_cmap_class_rec =
    {
      sizeof ( PFR_CMapRec ),
  
      (FT_CMap_InitFunc)     pfr_cmap_init,
      (FT_CMap_DoneFunc)     pfr_cmap_done,
      (FT_CMap_CharIndexFunc)pfr_cmap_char_index,
      (FT_CMap_CharNextFunc) pfr_cmap_char_next,
  
      NULL, NULL, NULL, NULL, NULL
    };
  
  
  /* END */
  

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