kc3-lang/freetype/src/sfnt/sfdriver.c

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• Hash : 3205a44d
  Author :
  Date : 2016-12-09T06:55:34
  

  [sfnt] Revert change from 2016-12-08. I missed the functionality of `ft_module_get_service', which makes the change unnecessary.

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• src/sfnt/sfdriver.c

• /***************************************************************************/
  /*                                                                         */
  /*  sfdriver.c                                                             */
  /*                                                                         */
  /*    High-level SFNT driver interface (body).                             */
  /*                                                                         */
  /*  Copyright 1996-2016 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_SFNT_H
  #include FT_INTERNAL_OBJECTS_H
  
  #include "sfdriver.h"
  #include "ttload.h"
  #include "sfobjs.h"
  #include "sfntpic.h"
  
  #include "sferrors.h"
  
  #ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
  #include "ttsbit.h"
  #endif
  
  #ifdef TT_CONFIG_OPTION_POSTSCRIPT_NAMES
  #include "ttpost.h"
  #endif
  
  #ifdef TT_CONFIG_OPTION_BDF
  #include "ttbdf.h"
  #include FT_SERVICE_BDF_H
  #endif
  
  #include "ttcmap.h"
  #include "ttkern.h"
  #include "ttmtx.h"
  
  #include FT_SERVICE_GLYPH_DICT_H
  #include FT_SERVICE_POSTSCRIPT_NAME_H
  #include FT_SERVICE_SFNT_H
  #include FT_SERVICE_TT_CMAP_H
  
  
    /*************************************************************************/
    /*                                                                       */
    /* 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_sfdriver
  
  
    /*
     *  SFNT TABLE SERVICE
     *
     */
  
    static void*
    get_sfnt_table( TT_Face      face,
                    FT_Sfnt_Tag  tag )
    {
      void*  table;
  
  
      switch ( tag )
      {
      case FT_SFNT_HEAD:
        table = &face->header;
        break;
  
      case FT_SFNT_HHEA:
        table = &face->horizontal;
        break;
  
      case FT_SFNT_VHEA:
        table = face->vertical_info ? &face->vertical : NULL;
        break;
  
      case FT_SFNT_OS2:
        table = face->os2.version == 0xFFFFU ? NULL : &face->os2;
        break;
  
      case FT_SFNT_POST:
        table = &face->postscript;
        break;
  
      case FT_SFNT_MAXP:
        table = &face->max_profile;
        break;
  
      case FT_SFNT_PCLT:
        table = face->pclt.Version ? &face->pclt : NULL;
        break;
  
      default:
        table = NULL;
      }
  
      return table;
    }
  
  
    static FT_Error
    sfnt_table_info( TT_Face    face,
                     FT_UInt    idx,
                     FT_ULong  *tag,
                     FT_ULong  *offset,
                     FT_ULong  *length )
    {
      if ( !offset || !length )
        return FT_THROW( Invalid_Argument );
  
      if ( !tag )
        *length = face->num_tables;
      else
      {
        if ( idx >= face->num_tables )
          return FT_THROW( Table_Missing );
  
        *tag    = face->dir_tables[idx].Tag;
        *offset = face->dir_tables[idx].Offset;
        *length = face->dir_tables[idx].Length;
      }
  
      return FT_Err_Ok;
    }
  
  
    FT_DEFINE_SERVICE_SFNT_TABLEREC(
      sfnt_service_sfnt_table,
  
      (FT_SFNT_TableLoadFunc)tt_face_load_any,     /* load_table */
      (FT_SFNT_TableGetFunc) get_sfnt_table,       /* get_table  */
      (FT_SFNT_TableInfoFunc)sfnt_table_info       /* table_info */
    )
  
  
  #ifdef TT_CONFIG_OPTION_POSTSCRIPT_NAMES
  
    /*
     *  GLYPH DICT SERVICE
     *
     */
  
    static FT_Error
    sfnt_get_glyph_name( FT_Face     face,
                         FT_UInt     glyph_index,
                         FT_Pointer  buffer,
                         FT_UInt     buffer_max )
    {
      FT_String*  gname;
      FT_Error    error;
  
  
      error = tt_face_get_ps_name( (TT_Face)face, glyph_index, &gname );
      if ( !error )
        FT_STRCPYN( buffer, gname, buffer_max );
  
      return error;
    }
  
  
    static FT_UInt
    sfnt_get_name_index( FT_Face     face,
                         FT_String*  glyph_name )
    {
      TT_Face  ttface = (TT_Face)face;
  
      FT_UInt  i, max_gid = FT_UINT_MAX;
  
  
      if ( face->num_glyphs < 0 )
        return 0;
      else if ( (FT_ULong)face->num_glyphs < FT_UINT_MAX )
        max_gid = (FT_UInt)face->num_glyphs;
      else
        FT_TRACE0(( "Ignore glyph names for invalid GID 0x%08x - 0x%08x\n",
                    FT_UINT_MAX, face->num_glyphs ));
  
      for ( i = 0; i < max_gid; i++ )
      {
        FT_String*  gname;
        FT_Error    error = tt_face_get_ps_name( ttface, i, &gname );
  
  
        if ( error )
          continue;
  
        if ( !ft_strcmp( glyph_name, gname ) )
          return i;
      }
  
      return 0;
    }
  
  
    FT_DEFINE_SERVICE_GLYPHDICTREC(
      sfnt_service_glyph_dict,
  
      (FT_GlyphDict_GetNameFunc)  sfnt_get_glyph_name,    /* get_name   */
      (FT_GlyphDict_NameIndexFunc)sfnt_get_name_index     /* name_index */
    )
  
  #endif /* TT_CONFIG_OPTION_POSTSCRIPT_NAMES */
  
  
    /*
     *  POSTSCRIPT NAME SERVICE
     *
     */
  
    static const char*
    sfnt_get_ps_name( TT_Face  face )
    {
      FT_Int       n, found_win, found_apple;
      const char*  result = NULL;
  
  
      /* shouldn't happen, but just in case to avoid memory leaks */
      if ( face->postscript_name )
        return face->postscript_name;
  
      /* scan the name table to see whether we have a Postscript name here, */
      /* either in Macintosh or Windows platform encodings                  */
      found_win   = -1;
      found_apple = -1;
  
      for ( n = 0; n < face->num_names; n++ )
      {
        TT_NameEntryRec*  name = face->name_table.names + n;
  
  
        if ( name->nameID == 6 && name->stringLength > 0 )
        {
          if ( name->platformID == 3     &&
               name->encodingID == 1     &&
               name->languageID == 0x409 )
            found_win = n;
  
          if ( name->platformID == 1 &&
               name->encodingID == 0 &&
               name->languageID == 0 )
            found_apple = n;
        }
      }
  
      if ( found_win != -1 )
      {
        FT_Memory         memory = face->root.memory;
        TT_NameEntryRec*  name   = face->name_table.names + found_win;
        FT_UInt           len    = name->stringLength / 2;
        FT_Error          error  = FT_Err_Ok;
  
        FT_UNUSED( error );
  
  
        if ( !FT_ALLOC( result, name->stringLength + 1 ) )
        {
          FT_Stream   stream = face->name_table.stream;
          FT_String*  r      = (FT_String*)result;
          FT_Char*    p;
  
  
          if ( FT_STREAM_SEEK( name->stringOffset ) ||
               FT_FRAME_ENTER( name->stringLength ) )
          {
            FT_FREE( result );
            name->stringLength = 0;
            name->stringOffset = 0;
            FT_FREE( name->string );
  
            goto Exit;
          }
  
          p = (FT_Char*)stream->cursor;
  
          for ( ; len > 0; len--, p += 2 )
          {
            if ( p[0] == 0 && p[1] >= 32 )
              *r++ = p[1];
          }
          *r = '\0';
  
          FT_FRAME_EXIT();
        }
        goto Exit;
      }
  
      if ( found_apple != -1 )
      {
        FT_Memory         memory = face->root.memory;
        TT_NameEntryRec*  name   = face->name_table.names + found_apple;
        FT_UInt           len    = name->stringLength;
        FT_Error          error  = FT_Err_Ok;
  
        FT_UNUSED( error );
  
  
        if ( !FT_ALLOC( result, len + 1 ) )
        {
          FT_Stream  stream = face->name_table.stream;
  
  
          if ( FT_STREAM_SEEK( name->stringOffset ) ||
               FT_STREAM_READ( result, len )        )
          {
            name->stringOffset = 0;
            name->stringLength = 0;
            FT_FREE( name->string );
            FT_FREE( result );
            goto Exit;
          }
          ((char*)result)[len] = '\0';
        }
      }
  
    Exit:
      face->postscript_name = result;
      return result;
    }
  
  
    FT_DEFINE_SERVICE_PSFONTNAMEREC(
      sfnt_service_ps_name,
  
      (FT_PsName_GetFunc)sfnt_get_ps_name       /* get_ps_font_name */
    )
  
  
    /*
     *  TT CMAP INFO
     */
    FT_DEFINE_SERVICE_TTCMAPSREC(
      tt_service_get_cmap_info,
  
      (TT_CMap_Info_GetFunc)tt_get_cmap_info    /* get_cmap_info */
    )
  
  
  #ifdef TT_CONFIG_OPTION_BDF
  
    static FT_Error
    sfnt_get_charset_id( TT_Face       face,
                         const char*  *acharset_encoding,
                         const char*  *acharset_registry )
    {
      BDF_PropertyRec  encoding, registry;
      FT_Error         error;
  
  
      /* XXX: I don't know whether this is correct, since
       *      tt_face_find_bdf_prop only returns something correct if we have
       *      previously selected a size that is listed in the BDF table.
       *      Should we change the BDF table format to include single offsets
       *      for `CHARSET_REGISTRY' and `CHARSET_ENCODING'?
       */
      error = tt_face_find_bdf_prop( face, "CHARSET_REGISTRY", &registry );
      if ( !error )
      {
        error = tt_face_find_bdf_prop( face, "CHARSET_ENCODING", &encoding );
        if ( !error )
        {
          if ( registry.type == BDF_PROPERTY_TYPE_ATOM &&
               encoding.type == BDF_PROPERTY_TYPE_ATOM )
          {
            *acharset_encoding = encoding.u.atom;
            *acharset_registry = registry.u.atom;
          }
          else
            error = FT_THROW( Invalid_Argument );
        }
      }
  
      return error;
    }
  
  
    FT_DEFINE_SERVICE_BDFRec(
      sfnt_service_bdf,
  
      (FT_BDF_GetCharsetIdFunc)sfnt_get_charset_id,     /* get_charset_id */
      (FT_BDF_GetPropertyFunc) tt_face_find_bdf_prop    /* get_property   */
    )
  
  
  #endif /* TT_CONFIG_OPTION_BDF */
  
  
    /*
     *  SERVICE LIST
     */
  
  #if defined TT_CONFIG_OPTION_POSTSCRIPT_NAMES && defined TT_CONFIG_OPTION_BDF
    FT_DEFINE_SERVICEDESCREC5(
      sfnt_services,
  
      FT_SERVICE_ID_SFNT_TABLE,           &SFNT_SERVICE_SFNT_TABLE_GET,
      FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &SFNT_SERVICE_PS_NAME_GET,
      FT_SERVICE_ID_GLYPH_DICT,           &SFNT_SERVICE_GLYPH_DICT_GET,
      FT_SERVICE_ID_BDF,                  &SFNT_SERVICE_BDF_GET,
      FT_SERVICE_ID_TT_CMAP,              &TT_SERVICE_CMAP_INFO_GET )
  #elif defined TT_CONFIG_OPTION_POSTSCRIPT_NAMES
    FT_DEFINE_SERVICEDESCREC4(
      sfnt_services,
  
      FT_SERVICE_ID_SFNT_TABLE,           &SFNT_SERVICE_SFNT_TABLE_GET,
      FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &SFNT_SERVICE_PS_NAME_GET,
      FT_SERVICE_ID_GLYPH_DICT,           &SFNT_SERVICE_GLYPH_DICT_GET,
      FT_SERVICE_ID_TT_CMAP,              &TT_SERVICE_CMAP_INFO_GET )
  #elif defined TT_CONFIG_OPTION_BDF
    FT_DEFINE_SERVICEDESCREC4(
      sfnt_services,
  
      FT_SERVICE_ID_SFNT_TABLE,           &SFNT_SERVICE_SFNT_TABLE_GET,
      FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &SFNT_SERVICE_PS_NAME_GET,
      FT_SERVICE_ID_BDF,                  &SFNT_SERVICE_BDF_GET,
      FT_SERVICE_ID_TT_CMAP,              &TT_SERVICE_CMAP_INFO_GET )
  #else
    FT_DEFINE_SERVICEDESCREC3(
      sfnt_services,
  
      FT_SERVICE_ID_SFNT_TABLE,           &SFNT_SERVICE_SFNT_TABLE_GET,
      FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &SFNT_SERVICE_PS_NAME_GET,
      FT_SERVICE_ID_TT_CMAP,              &TT_SERVICE_CMAP_INFO_GET )
  #endif
  
  
    FT_CALLBACK_DEF( FT_Module_Interface )
    sfnt_get_interface( FT_Module    module,
                        const char*  module_interface )
    {
      /* SFNT_SERVICES_GET dereferences `library' in PIC mode */
  #ifdef FT_CONFIG_OPTION_PIC
      FT_Library  library;
  
  
      if ( !module )
        return NULL;
      library = module->library;
      if ( !library )
        return NULL;
  #else
      FT_UNUSED( module );
  #endif
  
      return ft_service_list_lookup( SFNT_SERVICES_GET, module_interface );
    }
  
  
  #ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
  #define PUT_EMBEDDED_BITMAPS( a )  a
  #else
  #define PUT_EMBEDDED_BITMAPS( a )  NULL
  #endif
  
  #ifdef TT_CONFIG_OPTION_POSTSCRIPT_NAMES
  #define PUT_PS_NAMES( a )  a
  #else
  #define PUT_PS_NAMES( a )  NULL
  #endif
  
    FT_DEFINE_SFNT_INTERFACE(
      sfnt_interface,
  
      tt_face_goto_table,     /* TT_Loader_GotoTableFunc goto_table      */
  
      sfnt_init_face,         /* TT_Init_Face_Func       init_face       */
      sfnt_load_face,         /* TT_Load_Face_Func       load_face       */
      sfnt_done_face,         /* TT_Done_Face_Func       done_face       */
      sfnt_get_interface,     /* FT_Module_Requester     get_interface   */
  
      tt_face_load_any,       /* TT_Load_Any_Func        load_any        */
  
      tt_face_load_head,      /* TT_Load_Table_Func      load_head       */
      tt_face_load_hhea,      /* TT_Load_Metrics_Func    load_hhea       */
      tt_face_load_cmap,      /* TT_Load_Table_Func      load_cmap       */
      tt_face_load_maxp,      /* TT_Load_Table_Func      load_maxp       */
      tt_face_load_os2,       /* TT_Load_Table_Func      load_os2        */
      tt_face_load_post,      /* TT_Load_Table_Func      load_post       */
  
      tt_face_load_name,      /* TT_Load_Table_Func      load_name       */
      tt_face_free_name,      /* TT_Free_Table_Func      free_name       */
  
      tt_face_load_kern,      /* TT_Load_Table_Func      load_kern       */
      tt_face_load_gasp,      /* TT_Load_Table_Func      load_gasp       */
      tt_face_load_pclt,      /* TT_Load_Table_Func      load_init       */
  
      /* see `ttload.h' */
      PUT_EMBEDDED_BITMAPS( tt_face_load_bhed ),
                              /* TT_Load_Table_Func      load_bhed       */
      PUT_EMBEDDED_BITMAPS( tt_face_load_sbit_image ),
                              /* TT_Load_SBit_Image_Func load_sbit_image */
  
      /* see `ttpost.h' */
      PUT_PS_NAMES( tt_face_get_ps_name   ),
                              /* TT_Get_PS_Name_Func     get_psname      */
      PUT_PS_NAMES( tt_face_free_ps_names ),
                              /* TT_Free_Table_Func      free_psnames    */
  
      /* since version 2.1.8 */
      tt_face_get_kerning,    /* TT_Face_GetKerningFunc  get_kerning     */
  
      /* since version 2.2 */
      tt_face_load_font_dir,  /* TT_Load_Table_Func      load_font_dir   */
      tt_face_load_hmtx,      /* TT_Load_Metrics_Func    load_hmtx       */
  
      /* see `ttsbit.h' and `sfnt.h' */
      PUT_EMBEDDED_BITMAPS( tt_face_load_sbit ),
                              /* TT_Load_Table_Func      load_eblc       */
      PUT_EMBEDDED_BITMAPS( tt_face_free_sbit ),
                              /* TT_Free_Table_Func      free_eblc       */
  
      PUT_EMBEDDED_BITMAPS( tt_face_set_sbit_strike     ),
                              /* TT_Set_SBit_Strike_Func set_sbit_strike */
      PUT_EMBEDDED_BITMAPS( tt_face_load_strike_metrics ),
                      /* TT_Load_Strike_Metrics_Func load_strike_metrics */
  
      tt_face_get_metrics,    /* TT_Get_Metrics_Func     get_metrics     */
  
      tt_face_get_name        /* TT_Get_Name_Func        get_name        */
    )
  
  
    FT_DEFINE_MODULE(
      sfnt_module_class,
  
      0,  /* not a font driver or renderer */
      sizeof ( FT_ModuleRec ),
  
      "sfnt",     /* driver name                            */
      0x10000L,   /* driver version 1.0                     */
      0x20000L,   /* driver requires FreeType 2.0 or higher */
  
      (const void*)&SFNT_INTERFACE_GET,  /* module specific interface */
  
      (FT_Module_Constructor)NULL,               /* module_init   */
      (FT_Module_Destructor) NULL,               /* module_done   */
      (FT_Module_Requester)  sfnt_get_interface  /* get_interface */
    )
  
  
  /* END */
  

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