kc3-lang/freetype/src/cff/cffobjs.c

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• Hash : 7d0f0baf
  Author :
  Date : 2002-03-05T15:55:28
  

  * src/type1/t1objs.c (T1_Face_Init), src/cff/cffobjs.c (CFF_Face_Init), src/cid/cidobjs.c (CID_Face_Init): removing the bug that returned global BBox values in 16.16 fixed format (instead of integer font units).

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• src/cff/cffobjs.c

• /***************************************************************************/
  /*                                                                         */
  /*  cffobjs.c                                                              */
  /*                                                                         */
  /*    OpenType objects manager (body).                                     */
  /*                                                                         */
  /*  Copyright 1996-2001 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 <ft2build.h>
  #include FT_INTERNAL_DEBUG_H
  #include FT_INTERNAL_CALC_H
  #include FT_INTERNAL_STREAM_H
  #include FT_ERRORS_H
  #include FT_TRUETYPE_IDS_H
  #include FT_TRUETYPE_TAGS_H
  #include FT_INTERNAL_SFNT_H
  #include FT_INTERNAL_POSTSCRIPT_NAMES_H
  #include FT_INTERNAL_POSTSCRIPT_HINTS_H
  #include "cffobjs.h"
  #include "cffload.h"
  
  #include "cfferrs.h"
  
  #include <string.h>         /* for strlen() */
  
  
    /*************************************************************************/
    /*                                                                       */
    /* The macro FT_COMPONENT is used in trace mode.  It is an implicit      */
    /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log  */
    /* messages during execution.                                            */
    /*                                                                       */
  #undef  FT_COMPONENT
  #define FT_COMPONENT  trace_cffobjs
  
  
  
  
    /*************************************************************************/
    /*                                                                       */
    /*                            SIZE FUNCTIONS                             */
    /*                                                                       */
    /*  Note that we store the global hints in the size's "internal" root    */
    /*  field.                                                               */
    /*                                                                       */
    /*************************************************************************/
  
  
    static PSH_Globals_Funcs
    CFF_Size_Get_Globals_Funcs( CFF_Size  size )
    {
      CFF_Face           face     = (CFF_Face)size->face;
      CFF_Font*          font     = face->extra.data;
      PSHinter_Service   pshinter = font->pshinter;
      FT_Module          module;
  
  
      module = FT_Get_Module( size->face->driver->root.library,
                              "pshinter" );
      return ( module && pshinter && pshinter->get_globals_funcs )
             ? pshinter->get_globals_funcs( module )
             : 0;
    }
  
  
    FT_LOCAL_DEF( void )
    CFF_Size_Done( CFF_Size  size )
    {
      if ( size->internal )
      {
        PSH_Globals_Funcs  funcs;
  
  
        funcs = CFF_Size_Get_Globals_Funcs( size );
        if ( funcs )
          funcs->destroy( (PSH_Globals)size->internal );
  
        size->internal = 0;
      }
    }
  
  
    FT_LOCAL_DEF( FT_Error )
    CFF_Size_Init( CFF_Size  size )
    {
      FT_Error           error = 0;
      PSH_Globals_Funcs  funcs = CFF_Size_Get_Globals_Funcs( size );
  
  
      if ( funcs )
      {
        PSH_Globals    globals;
        CFF_Face       face    = (CFF_Face)size->face;
        CFF_Font*      font    = face->extra.data;
        CFF_SubFont*   subfont = &font->top_font;
  
        CFF_Private   cpriv   = &subfont->private_dict;
        PS_PrivateRec  priv;
  
  
        /* IMPORTANT: The CFF and Type1 private dictionaries have    */
        /*            slightly different structures; we need to      */
        /*            synthetize a type1 dictionary on the fly here. */
  
        {
          FT_UInt  n, count;
  
  
          MEM_Set( &priv, 0, sizeof ( priv ) );
  
          count = priv.num_blue_values = cpriv->num_blue_values;
          for ( n = 0; n < count; n++ )
            priv.blue_values[n] = (FT_Short)cpriv->blue_values[n];
  
          count = priv.num_other_blues = cpriv->num_other_blues;
          for ( n = 0; n < count; n++ )
            priv.other_blues[n] = (FT_Short)cpriv->other_blues[n];
  
          count = priv.num_family_blues = cpriv->num_family_blues;
          for ( n = 0; n < count; n++ )
            priv.family_blues[n] = (FT_Short)cpriv->family_blues[n];
  
          count = priv.num_family_other_blues = cpriv->num_family_other_blues;
          for ( n = 0; n < count; n++ )
            priv.family_other_blues[n] = (FT_Short)cpriv->family_other_blues[n];
  
          priv.blue_scale = cpriv->blue_scale;
          priv.blue_shift = cpriv->blue_shift;
          priv.blue_fuzz  = cpriv->blue_fuzz;
  
          priv.standard_width[0]  = (FT_UShort)cpriv->standard_width;
          priv.standard_height[0] = (FT_UShort)cpriv->standard_height;
  
          count = priv.num_snap_widths = cpriv->num_snap_widths;
          for ( n = 0; n < count; n++ )
            priv.snap_widths[n] = (FT_Short)cpriv->snap_widths[n];
  
          count = priv.num_snap_heights = cpriv->num_snap_heights;
          for ( n = 0; n < count; n++ )
            priv.snap_heights[n] = (FT_Short)cpriv->snap_heights[n];
  
          priv.force_bold     = cpriv->force_bold;
          priv.language_group = cpriv->language_group;
          priv.lenIV          = cpriv->lenIV;
        }
  
        error = funcs->create( size->face->memory, &priv, &globals );
        if ( !error )
          size->internal = (FT_Size_Internal)(void*)globals;
      }
  
      return error;
    }
  
  
    FT_LOCAL_DEF( FT_Error )
    CFF_Size_Reset( CFF_Size  size )
    {
      PSH_Globals_Funcs  funcs = CFF_Size_Get_Globals_Funcs( size );
      FT_Error           error = 0;
  
  
      if ( funcs )
        error = funcs->set_scale( (PSH_Globals)size->internal,
                                   size->metrics.x_scale,
                                   size->metrics.y_scale,
                                   0, 0 );
      return error;
    }
  
  
    /*************************************************************************/
    /*                                                                       */
    /*                            SLOT  FUNCTIONS                            */
    /*                                                                       */
    /*************************************************************************/
  
    FT_LOCAL_DEF( void )
    CFF_GlyphSlot_Done( CFF_GlyphSlot  slot )
    {
      slot->root.internal->glyph_hints = 0;
    }
  
  
    FT_LOCAL_DEF( FT_Error )
    CFF_GlyphSlot_Init( CFF_GlyphSlot  slot )
    {
      CFF_Face             face     = (CFF_Face)slot->root.face;
      CFF_Font*            font     = face->extra.data;
      PSHinter_Service  pshinter = font->pshinter;
  
  
      if ( pshinter )
      {
        FT_Module  module;
  
  
        module = FT_Get_Module( slot->root.face->driver->root.library,
                                "pshinter" );
        if ( module )
        {
          T2_Hints_Funcs  funcs;
  
  
          funcs = pshinter->get_t2_funcs( module );
          slot->root.internal->glyph_hints = (void*)funcs;
        }
      }
  
      return 0;
    }
  
  
    /*************************************************************************/
    /*                                                                       */
    /*                           FACE  FUNCTIONS                             */
    /*                                                                       */
    /*************************************************************************/
  
    static FT_String*
    CFF_StrCopy( FT_Memory         memory,
                 const FT_String*  source )
    {
      FT_Error    error;
      FT_String*  result = 0;
      FT_Int      len = (FT_Int)strlen( source );
  
  
      if ( !ALLOC( result, len + 1 ) )
      {
        MEM_Copy( result, source, len );
        result[len] = 0;
      }
  
      FT_UNUSED( error );
  
      return result;
    }
  
  
  #if 0
  
    /* this function is used to build a Unicode charmap from the glyph names */
    /* in a file                                                             */
    static FT_Error
    CFF_Build_Unicode_Charmap( CFF_Face            face,
                               FT_ULong            base_offset,
                               PSNames_Service  psnames )
    {
      CFF_Font*       font = (CFF_Font*)face->extra.data;
      FT_Memory       memory = FT_FACE_MEMORY(face);
      FT_UInt         n, num_glyphs = face->root.num_glyphs;
      const char**    glyph_names;
      FT_Error        error;
      CFF_Font_Dict*  dict = &font->top_font.font_dict;
      FT_ULong        charset_offset;
      FT_Byte         format;
      FT_Stream       stream = face->root.stream;
  
  
      charset_offset = dict->charset_offset;
      if ( !charset_offset )
      {
        FT_ERROR(( "CFF_Build_Unicode_Charmap: charset table is missing\n" ));
        error = CFF_Err_Invalid_File_Format;
        goto Exit;
      }
  
      /* allocate the charmap */
      if ( ALLOC( face->charmap, ...
  
      /* seek to charset table and allocate glyph names table */
      if ( FILE_Seek( base_offset + charset_offset )           ||
           ALLOC_ARRAY( glyph_names, num_glyphs, const char* ) )
        goto Exit;
  
      /* now, read each glyph name and store it in the glyph name table */
      if ( READ_Byte( format ) )
        goto Fail;
  
      switch ( format )
      {
      case 0:  /* format 0 - one SID per glyph */
        {
          const char**  gname = glyph_names;
          const char**  limit = gname + num_glyphs;
  
  
          if ( ACCESS_Frame( num_glyphs * 2 ) )
            goto Fail;
  
          for ( ; gname < limit; gname++ )
            gname[0] = CFF_Get_String( &font->string_index,
                                       GET_UShort(),
                                       psnames );
          FORGET_Frame();
          break;
        }
  
      case 1:  /* format 1 - sequential ranges                    */
      case 2:  /* format 2 - sequential ranges with 16-bit counts */
        {
          const char**  gname = glyph_names;
          const char**  limit = gname + num_glyphs;
          FT_UInt       len = 3;
  
  
          if ( format == 2 )
            len++;
  
          while ( gname < limit )
          {
            FT_UInt  first;
            FT_UInt  count;
  
  
            if ( ACCESS_Frame( len ) )
              goto Fail;
  
            first = GET_UShort();
            if ( format == 3 )
              count = GET_UShort();
            else
              count = GET_Byte();
  
            FORGET_Frame();
  
            for ( ; count > 0; count-- )
            {
              gname[0] = CFF_Get_String( &font->string_index,
                                         first,
                                         psnames );
              gname++;
              first++;
            }
          }
          break;
        }
  
      default:   /* unknown charset format! */
        FT_ERROR(( "CFF_Build_Unicode_Charmap: unknown charset format!\n" ));
        error = CFF_Err_Invalid_File_Format;
        goto Fail;
      }
  
      /* all right, the glyph names were loaded; we now need to create */
      /* the corresponding unicode charmap                             */
  
    Fail:
      for ( n = 0; n < num_glyphs; n++ )
        FREE( glyph_names[n] );
  
      FREE( glyph_names );
  
    Exit:
      return error;
    }
  
  #endif /* 0 */
  
  
    static FT_Encoding
    find_encoding( int  platform_id,
                   int  encoding_id )
    {
      typedef struct  TEncoding
      {
        int          platform_id;
        int          encoding_id;
        FT_Encoding  encoding;
  
      } TEncoding;
  
      static
      const TEncoding  tt_encodings[] =
      {
        { TT_PLATFORM_ISO,           -1,                  ft_encoding_unicode },
  
        { TT_PLATFORM_APPLE_UNICODE, -1,                  ft_encoding_unicode },
  
        { TT_PLATFORM_MACINTOSH,     TT_MAC_ID_ROMAN,     ft_encoding_apple_roman },
  
        { TT_PLATFORM_MICROSOFT,     TT_MS_ID_UNICODE_CS, ft_encoding_unicode },
        { TT_PLATFORM_MICROSOFT,     TT_MS_ID_SJIS,       ft_encoding_sjis },
        { TT_PLATFORM_MICROSOFT,     TT_MS_ID_GB2312,     ft_encoding_gb2312 },
        { TT_PLATFORM_MICROSOFT,     TT_MS_ID_BIG_5,      ft_encoding_big5 },
        { TT_PLATFORM_MICROSOFT,     TT_MS_ID_WANSUNG,    ft_encoding_wansung },
        { TT_PLATFORM_MICROSOFT,     TT_MS_ID_JOHAB,      ft_encoding_johab }
      };
  
      const TEncoding  *cur, *limit;
  
  
      cur   = tt_encodings;
      limit = cur + sizeof ( tt_encodings ) / sizeof ( tt_encodings[0] );
  
      for ( ; cur < limit; cur++ )
      {
        if ( cur->platform_id == platform_id )
        {
          if ( cur->encoding_id == encoding_id ||
               cur->encoding_id == -1          )
            return cur->encoding;
        }
      }
  
      return ft_encoding_none;
    }
  
  
    /*************************************************************************/
    /*                                                                       */
    /* <Function>                                                            */
    /*    CFF_Face_Init                                                      */
    /*                                                                       */
    /* <Description>                                                         */
    /*    Initializes a given OpenType face object.                          */
    /*                                                                       */
    /* <Input>                                                               */
    /*    stream     :: The source font stream.                              */
    /*                                                                       */
    /*    face_index :: The index of the font face in the resource.          */
    /*                                                                       */
    /*    num_params :: Number of additional generic parameters.  Ignored.   */
    /*                                                                       */
    /*    params     :: Additional generic parameters.  Ignored.             */
    /*                                                                       */
    /* <InOut>                                                               */
    /*    face       :: The newly built face object.                         */
    /*                                                                       */
    /* <Return>                                                              */
    /*    FreeType error code.  0 means success.                             */
    /*                                                                       */
    FT_LOCAL_DEF( FT_Error )
    CFF_Face_Init( FT_Stream      stream,
                   CFF_Face       face,
                   FT_Int         face_index,
                   FT_Int         num_params,
                   FT_Parameter*  params )
    {
      FT_Error             error;
      SFNT_Service      sfnt;
      PSNames_Service   psnames;
      PSHinter_Service  pshinter;
      FT_Bool              pure_cff    = 1;
      FT_Bool              sfnt_format = 0;
  
  
      sfnt = (SFNT_Service)FT_Get_Module_Interface(
               face->root.driver->root.library, "sfnt" );
      if ( !sfnt )
        goto Bad_Format;
  
      psnames = (PSNames_Service)FT_Get_Module_Interface(
                  face->root.driver->root.library, "psnames" );
  
      pshinter = (PSHinter_Service)FT_Get_Module_Interface(
                   face->root.driver->root.library, "pshinter" );
  
      /* create input stream from resource */
      if ( FILE_Seek( 0 ) )
        goto Exit;
  
      /* check that we have a valid OpenType file */
      error = sfnt->init_face( stream, face, face_index, num_params, params );
      if ( !error )
      {
        if ( face->format_tag != 0x4F54544FL )  /* `OTTO'; OpenType/CFF font */
        {
          FT_TRACE2(( "[not a valid OpenType/CFF font]\n" ));
          goto Bad_Format;
        }
  
        /* if we are performing a simple font format check, exit immediately */
        if ( face_index < 0 )
          return CFF_Err_Ok;
  
        sfnt_format = 1;
  
        /* now, the font can be either an OpenType/CFF font, or an SVG CEF */
        /* font in the later case; it doesn't have a `head' table          */
        error = face->goto_table( face, TTAG_head, stream, 0 );
        if ( !error )
        {
          pure_cff = 0;
  
          /* load font directory */
          error = sfnt->load_face( stream, face,
                                   face_index, num_params, params );
          if ( error )
            goto Exit;
        }
        else
        {
          /* load the `cmap' table by hand */
          error = sfnt->load_charmaps( face, stream );
          if ( error )
            goto Exit;
  
          /* XXX: we don't load the GPOS table, as OpenType Layout     */
          /* support will be added later to a layout library on top of */
          /* FreeType 2                                                */
        }
  
        /* now, load the CFF part of the file */
        error = face->goto_table( face, TTAG_CFF, stream, 0 );
        if ( error )
          goto Exit;
      }
      else
      {
        /* rewind to start of file; we are going to load a pure-CFF font */
        if ( FILE_Seek( 0 ) )
          goto Exit;
        error = CFF_Err_Ok;
      }
  
      /* now load and parse the CFF table in the file */
      {
        CFF_Font*  cff;
        FT_Memory  memory = face->root.memory;
        FT_Face    root;
        FT_UInt    flags;
  
  
        if ( ALLOC( cff, sizeof ( *cff ) ) )
          goto Exit;
  
        face->extra.data = cff;
        error = CFF_Load_Font( stream, face_index, cff );
        if ( error )
          goto Exit;
  
        cff->pshinter = pshinter;
  
        /* Complement the root flags with some interesting information. */
        /* Note that this is only necessary for pure CFF and CEF fonts. */
  
        root             = &face->root;
        root->num_glyphs = cff->num_glyphs;
  
        if ( pure_cff )
        {
          CFF_Font_Dict*  dict = &cff->top_font.font_dict;
  
  
          /* we need the `PSNames' module for pure-CFF and CEF formats */
          if ( !psnames )
          {
            FT_ERROR(( "CFF_Face_Init:" ));
            FT_ERROR(( " cannot open CFF & CEF fonts\n" ));
            FT_ERROR(( "             " ));
            FT_ERROR(( " without the `PSNames' module\n" ));
            goto Bad_Format;
          }
  
          /* Set up num_faces. */
          root->num_faces = cff->num_faces;
  
          /* compute number of glyphs */
          if ( dict->cid_registry )
            root->num_glyphs = dict->cid_count;
          else
            root->num_glyphs = cff->charstrings_index.count;
  
          /* set global bbox, as well as EM size */
          root->bbox.xMin =  dict->font_bbox.xMin >> 16;
          root->bbox.yMin =  dict->font_bbox.yMin >> 16;
          root->bbox.xMax = (dict->font_bbox.xMax + 0xFFFFU) >> 16;
          root->bbox.yMax = (dict->font_bbox.yMax + 0xFFFFU) >> 16;
  
  
          root->ascender  = (FT_Short)( root->bbox.yMax );
          root->descender = (FT_Short)( root->bbox.yMin );
          root->height    = (FT_Short)(
            ( ( root->ascender - root->descender ) * 12 ) / 10 );
  
          if ( dict->units_per_em )
            root->units_per_EM = dict->units_per_em;
          else
            root->units_per_EM = 1000;
  
          /* retrieve font family & style name */
          root->family_name  = CFF_Get_Name( &cff->name_index, face_index );
          if ( dict->cid_registry )
            root->style_name = CFF_StrCopy( memory, "Regular" );  /* XXXX */
          else
            root->style_name = CFF_Get_String( &cff->string_index,
                                               dict->weight,
                                               psnames );
  
          /*******************************************************************/
          /*                                                                 */
          /* Compute face flags.                                             */
          /*                                                                 */
          flags = FT_FACE_FLAG_SCALABLE  |    /* scalable outlines */
                  FT_FACE_FLAG_HORIZONTAL;    /* horizontal data   */
  
          if ( sfnt_format )
            flags |= FT_FACE_FLAG_SFNT;
  
          /* fixed width font? */
          if ( dict->is_fixed_pitch )
            flags |= FT_FACE_FLAG_FIXED_WIDTH;
  
    /* XXX: WE DO NOT SUPPORT KERNING METRICS IN THE GPOS TABLE FOR NOW */
  #if 0
          /* kerning available? */
          if ( face->kern_pairs )
            flags |= FT_FACE_FLAG_KERNING;
  #endif
  
  #ifndef FT_CONFIG_OPTION_NO_GLYPH_NAMES
          flags |= FT_FACE_FLAG_GLYPH_NAMES;
  #endif
  
          root->face_flags = flags;
  
          /*******************************************************************/
          /*                                                                 */
          /* Compute style flags.                                            */
          /*                                                                 */
          flags = 0;
  
          if ( dict->italic_angle )
            flags |= FT_STYLE_FLAG_ITALIC;
  
          /* XXX: may not be correct */
          if ( cff->top_font.private_dict.force_bold )
            flags |= FT_STYLE_FLAG_BOLD;
  
          root->style_flags = flags;
  
          /* set the charmaps if any */
          if ( sfnt_format )
          {
            /*****************************************************************/
            /*                                                               */
            /* Polish the charmaps.                                          */
            /*                                                               */
            /*   Try to set the charmap encoding according to the platform & */
            /*   encoding ID of each charmap.                                */
            /*                                                               */
            TT_CharMap  charmap;
            FT_Int      n;
  
  
            charmap            = face->charmaps;
            root->num_charmaps = face->num_charmaps;
  
            /* allocate table of pointers */
            if ( ALLOC_ARRAY( root->charmaps, root->num_charmaps, FT_CharMap ) )
              goto Exit;
  
            for ( n = 0; n < root->num_charmaps; n++, charmap++ )
            {
              FT_Int  platform = charmap->cmap.platformID;
              FT_Int  encoding = charmap->cmap.platformEncodingID;
  
  
              charmap->root.face        = (FT_Face)face;
              charmap->root.platform_id = (FT_UShort)platform;
              charmap->root.encoding_id = (FT_UShort)encoding;
              charmap->root.encoding    = find_encoding( platform, encoding );
  
              /* now, set root->charmap with a unicode charmap */
              /* wherever available                            */
              if ( !root->charmap                                &&
                   charmap->root.encoding == ft_encoding_unicode )
                root->charmap = (FT_CharMap)charmap;
  
              root->charmaps[n] = (FT_CharMap)charmap;
            }
          }
        }
      }
  
    Exit:
      return error;
  
    Bad_Format:
      error = CFF_Err_Unknown_File_Format;
      goto Exit;
    }
  
  
    /*************************************************************************/
    /*                                                                       */
    /* <Function>                                                            */
    /*    CFF_Face_Done                                                      */
    /*                                                                       */
    /* <Description>                                                         */
    /*    Finalizes a given face object.                                     */
    /*                                                                       */
    /* <Input>                                                               */
    /*    face :: A pointer to the face object to destroy.                   */
    /*                                                                       */
    FT_LOCAL_DEF( void )
    CFF_Face_Done( CFF_Face  face )
    {
      FT_Memory        memory = face->root.memory;
      SFNT_Service  sfnt   = (SFNT_Service)face->sfnt;
  
  
      if ( sfnt )
        sfnt->done_face( face );
  
      {
        CFF_Font*  cff = (CFF_Font*)face->extra.data;
  
  
        if ( cff )
        {
          CFF_Done_Font( cff );
          FREE( face->extra.data );
        }
      }
    }
  
  
    /*************************************************************************/
    /*                                                                       */
    /* <Function>                                                            */
    /*    CFF_Driver_Init                                                    */
    /*                                                                       */
    /* <Description>                                                         */
    /*    Initializes a given OpenType driver object.                        */
    /*                                                                       */
    /* <Input>                                                               */
    /*    driver :: A handle to the target driver object.                    */
    /*                                                                       */
    /* <Return>                                                              */
    /*    FreeType error code.  0 means success.                             */
    /*                                                                       */
    FT_LOCAL_DEF( FT_Error )
    CFF_Driver_Init( CFF_Driver  driver )
    {
      /* init extension registry if needed */
  
  #ifdef TT_CONFIG_OPTION_EXTEND_ENGINE
  
      return TT_Init_Extensions( driver );
  
  #else
  
      FT_UNUSED( driver );
  
      return CFF_Err_Ok;
  
  #endif
    }
  
  
    /*************************************************************************/
    /*                                                                       */
    /* <Function>                                                            */
    /*    CFF_Driver_Done                                                    */
    /*                                                                       */
    /* <Description>                                                         */
    /*    Finalizes a given OpenType driver.                                 */
    /*                                                                       */
    /* <Input>                                                               */
    /*    driver :: A handle to the target OpenType driver.                  */
    /*                                                                       */
    FT_LOCAL_DEF( void )
    CFF_Driver_Done( CFF_Driver  driver )
    {
      /* destroy extensions registry if needed */
  
  #ifdef TT_CONFIG_OPTION_EXTEND_ENGINE
  
      TT_Done_Extensions( driver );
  
  #else
  
      FT_UNUSED( driver );
  
  #endif
    }
  
  
  /* END */
  

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