misc/libfreetype/src/cff/cffcmap.c
author nemo
Sun, 25 Sep 2011 15:40:01 -0400
changeset 6028 335eaf56d976
parent 5172 88f2e05288ba
permissions -rw-r--r--
rename to match prior mass hat rename
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/***************************************************************************/
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/*                                                                         */
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/*  cffcmap.c                                                              */
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/*                                                                         */
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/*    CFF character mapping table (cmap) support (body).                   */
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/*                                                                         */
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/*  Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2010 by                  */
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/*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
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/*                                                                         */
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/*  This file is part of the FreeType project, and may only be used,       */
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/*  modified, and distributed under the terms of the FreeType project      */
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/*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
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/*  this file you indicate that you have read the license and              */
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/*  understand and accept it fully.                                        */
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/*                                                                         */
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/***************************************************************************/
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#include "cffcmap.h"
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#include "cffload.h"
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#include "cfferrs.h"
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  /*************************************************************************/
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  /*************************************************************************/
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  /*****                                                               *****/
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  /*****           CFF STANDARD (AND EXPERT) ENCODING CMAPS            *****/
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  /*****                                                               *****/
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  /*************************************************************************/
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  /*************************************************************************/
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  FT_CALLBACK_DEF( FT_Error )
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  cff_cmap_encoding_init( CFF_CMapStd  cmap )
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  {
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    TT_Face       face     = (TT_Face)FT_CMAP_FACE( cmap );
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    CFF_Font      cff      = (CFF_Font)face->extra.data;
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    CFF_Encoding  encoding = &cff->encoding;
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    cmap->gids  = encoding->codes;
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    return 0;
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  }
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  FT_CALLBACK_DEF( void )
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  cff_cmap_encoding_done( CFF_CMapStd  cmap )
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  {
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    cmap->gids  = NULL;
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  }
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  FT_CALLBACK_DEF( FT_UInt )
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  cff_cmap_encoding_char_index( CFF_CMapStd  cmap,
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                                FT_UInt32    char_code )
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  {
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    FT_UInt  result = 0;
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    if ( char_code < 256 )
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      result = cmap->gids[char_code];
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    return result;
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  }
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  FT_CALLBACK_DEF( FT_UInt32 )
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  cff_cmap_encoding_char_next( CFF_CMapStd   cmap,
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                               FT_UInt32    *pchar_code )
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  {
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    FT_UInt    result    = 0;
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    FT_UInt32  char_code = *pchar_code;
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    *pchar_code = 0;
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    if ( char_code < 255 )
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    {
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      FT_UInt  code = (FT_UInt)(char_code + 1);
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      for (;;)
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      {
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        if ( code >= 256 )
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          break;
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        result = cmap->gids[code];
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        if ( result != 0 )
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        {
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          *pchar_code = code;
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          break;
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        }
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        code++;
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      }
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    }
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    return result;
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  }
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  FT_DEFINE_CMAP_CLASS(cff_cmap_encoding_class_rec,
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    sizeof ( CFF_CMapStdRec ),
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    (FT_CMap_InitFunc)     cff_cmap_encoding_init,
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    (FT_CMap_DoneFunc)     cff_cmap_encoding_done,
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    (FT_CMap_CharIndexFunc)cff_cmap_encoding_char_index,
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    (FT_CMap_CharNextFunc) cff_cmap_encoding_char_next,
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    NULL, NULL, NULL, NULL, NULL
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  )
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  /*************************************************************************/
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  /*************************************************************************/
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  /*****                                                               *****/
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  /*****              CFF SYNTHETIC UNICODE ENCODING CMAP              *****/
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  /*****                                                               *****/
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  /*************************************************************************/
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  /*************************************************************************/
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  FT_CALLBACK_DEF( const char* )
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  cff_sid_to_glyph_name( TT_Face  face,
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                         FT_UInt  idx )
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  {
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    CFF_Font     cff     = (CFF_Font)face->extra.data;
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    CFF_Charset  charset = &cff->charset;
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    FT_UInt      sid     = charset->sids[idx];
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    return cff_index_get_sid_string( cff, sid );
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  }
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  FT_CALLBACK_DEF( FT_Error )
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  cff_cmap_unicode_init( PS_Unicodes  unicodes )
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  {
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    TT_Face             face    = (TT_Face)FT_CMAP_FACE( unicodes );
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    FT_Memory           memory  = FT_FACE_MEMORY( face );
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    CFF_Font            cff     = (CFF_Font)face->extra.data;
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    CFF_Charset         charset = &cff->charset;
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    FT_Service_PsCMaps  psnames = (FT_Service_PsCMaps)cff->psnames;
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    /* can't build Unicode map for CID-keyed font */
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    /* because we don't know glyph names.         */
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    if ( !charset->sids )
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      return CFF_Err_No_Unicode_Glyph_Name;
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    return psnames->unicodes_init( memory,
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                                   unicodes,
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                                   cff->num_glyphs,
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                                   (PS_GetGlyphNameFunc)&cff_sid_to_glyph_name,
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                                   (PS_FreeGlyphNameFunc)NULL,
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                                   (FT_Pointer)face );
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  }
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  FT_CALLBACK_DEF( void )
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  cff_cmap_unicode_done( PS_Unicodes  unicodes )
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  {
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    FT_Face    face   = FT_CMAP_FACE( unicodes );
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    FT_Memory  memory = FT_FACE_MEMORY( face );
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    FT_FREE( unicodes->maps );
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    unicodes->num_maps = 0;
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  }
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  FT_CALLBACK_DEF( FT_UInt )
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  cff_cmap_unicode_char_index( PS_Unicodes  unicodes,
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                               FT_UInt32    char_code )
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  {
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    TT_Face             face    = (TT_Face)FT_CMAP_FACE( unicodes );
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    CFF_Font            cff     = (CFF_Font)face->extra.data;
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    FT_Service_PsCMaps  psnames = (FT_Service_PsCMaps)cff->psnames;
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    return psnames->unicodes_char_index( unicodes, char_code );
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  }
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  FT_CALLBACK_DEF( FT_UInt32 )
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  cff_cmap_unicode_char_next( PS_Unicodes  unicodes,
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                              FT_UInt32   *pchar_code )
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  {
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    TT_Face             face    = (TT_Face)FT_CMAP_FACE( unicodes );
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    CFF_Font            cff     = (CFF_Font)face->extra.data;
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    FT_Service_PsCMaps  psnames = (FT_Service_PsCMaps)cff->psnames;
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    return psnames->unicodes_char_next( unicodes, pchar_code );
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  }
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  FT_DEFINE_CMAP_CLASS(cff_cmap_unicode_class_rec,
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    sizeof ( PS_UnicodesRec ),
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    (FT_CMap_InitFunc)     cff_cmap_unicode_init,
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    (FT_CMap_DoneFunc)     cff_cmap_unicode_done,
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    (FT_CMap_CharIndexFunc)cff_cmap_unicode_char_index,
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    (FT_CMap_CharNextFunc) cff_cmap_unicode_char_next,
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    NULL, NULL, NULL, NULL, NULL
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  )
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/* END */