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

• Show log

  Commit

• Hash : 3d780173
  Author :
  Date : 2004-01-11T10:01:08
  

  Make `FT_Get_CMap_Language_ID' work with CFF. Bug reported by Steve Hartwell <shspamsink@comcast.net>. * src/cff/cffdrivr.c: Include FT_SERVICE_TT_CMAP_H. (cff_services): Added an entry for FT_SERVICE_ID_TT_CMAP. (cff_get_cmap_info): New function. (cff_service_get_cmap_info) New entry for cff_services. * src/sfnt/ttcmap0.c: Exit loop after a format match has been found. Suggested by Steve Hartwell <shspamsink@comcast.net>.

Download

• src/cff/cffdrivr.c

• /***************************************************************************/
  /*                                                                         */
  /*  cffdrivr.c                                                             */
  /*                                                                         */
  /*    OpenType font driver implementation (body).                          */
  /*                                                                         */
  /*  Copyright 1996-2001, 2002, 2003, 2004 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_FREETYPE_H
  #include FT_INTERNAL_DEBUG_H
  #include FT_INTERNAL_STREAM_H
  #include FT_INTERNAL_SFNT_H
  #include FT_TRUETYPE_IDS_H
  #include FT_SERVICE_POSTSCRIPT_CMAPS_H
  #include FT_SERVICE_POSTSCRIPT_INFO_H
  #include FT_SERVICE_TT_CMAP_H
  
  #include "cffdrivr.h"
  #include "cffgload.h"
  #include "cffload.h"
  
  #include "cfferrs.h"
  
  #include FT_SERVICE_XFREE86_NAME_H
  #include FT_SERVICE_GLYPH_DICT_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_cffdriver
  
  
    /*************************************************************************/
    /*************************************************************************/
    /*************************************************************************/
    /****                                                                 ****/
    /****                                                                 ****/
    /****                          F A C E S                              ****/
    /****                                                                 ****/
    /****                                                                 ****/
    /*************************************************************************/
    /*************************************************************************/
    /*************************************************************************/
  
  
  #undef  PAIR_TAG
  #define PAIR_TAG( left, right )  ( ( (FT_ULong)left << 16 ) | \
                                       (FT_ULong)right        )
  
  
    /*************************************************************************/
    /*                                                                       */
    /* <Function>                                                            */
    /*    Get_Kerning                                                        */
    /*                                                                       */
    /* <Description>                                                         */
    /*    A driver method used to return the kerning vector between two      */
    /*    glyphs of the same face.                                           */
    /*                                                                       */
    /* <Input>                                                               */
    /*    face        :: A handle to the source face object.                 */
    /*                                                                       */
    /*    left_glyph  :: The index of the left glyph in the kern pair.       */
    /*                                                                       */
    /*    right_glyph :: The index of the right glyph in the kern pair.      */
    /*                                                                       */
    /* <Output>                                                              */
    /*    kerning     :: The kerning vector.  This is in font units for      */
    /*                   scalable formats, and in pixels for fixed-sizes     */
    /*                   formats.                                            */
    /*                                                                       */
    /* <Return>                                                              */
    /*    FreeType error code.  0 means success.                             */
    /*                                                                       */
    /* <Note>                                                                */
    /*    Only horizontal layouts (left-to-right & right-to-left) are        */
    /*    supported by this function.  Other layouts, or more sophisticated  */
    /*    kernings, are out of scope of this method (the basic driver        */
    /*    interface is meant to be simple).                                  */
    /*                                                                       */
    /*    They can be implemented by format-specific interfaces.             */
    /*                                                                       */
    static FT_Error
    Get_Kerning( TT_Face     face,
                 FT_UInt     left_glyph,
                 FT_UInt     right_glyph,
                 FT_Vector*  kerning )
    {
      TT_Kern0_Pair  pair;
  
  
      if ( !face )
        return CFF_Err_Invalid_Face_Handle;
  
      kerning->x = 0;
      kerning->y = 0;
  
      if ( face->kern_pairs )
      {
        /* there are some kerning pairs in this font file! */
        FT_ULong  search_tag = PAIR_TAG( left_glyph, right_glyph );
        FT_Long   left, right;
  
  
        left  = 0;
        right = face->num_kern_pairs - 1;
  
        while ( left <= right )
        {
          FT_Long   middle = left + ( ( right - left ) >> 1 );
          FT_ULong  cur_pair;
  
  
          pair     = face->kern_pairs + middle;
          cur_pair = PAIR_TAG( pair->left, pair->right );
  
          if ( cur_pair == search_tag )
            goto Found;
  
          if ( cur_pair < search_tag )
            left = middle + 1;
          else
            right = middle - 1;
        }
      }
  
    Exit:
      return CFF_Err_Ok;
  
    Found:
      kerning->x = pair->value;
      goto Exit;
    }
  
  
  #undef PAIR_TAG
  
  
    /*************************************************************************/
    /*                                                                       */
    /* <Function>                                                            */
    /*    Load_Glyph                                                         */
    /*                                                                       */
    /* <Description>                                                         */
    /*    A driver method used to load a glyph within a given glyph slot.    */
    /*                                                                       */
    /* <Input>                                                               */
    /*    slot        :: A handle to the target slot object where the glyph  */
    /*                   will be loaded.                                     */
    /*                                                                       */
    /*    size        :: A handle to the source face size at which the glyph */
    /*                   must be scaled, loaded, etc.                        */
    /*                                                                       */
    /*    glyph_index :: The index of the glyph in the font file.            */
    /*                                                                       */
    /*    load_flags  :: A flag indicating what to load for this glyph.  The */
    /*                   FT_LOAD_??? constants can be used to control the    */
    /*                   glyph loading process (e.g., whether the outline    */
    /*                   should be scaled, whether to load bitmaps or not,   */
    /*                   whether to hint the outline, etc).                  */
    /*                                                                       */
    /* <Return>                                                              */
    /*    FreeType error code.  0 means success.                             */
    /*                                                                       */
    static FT_Error
    Load_Glyph( CFF_GlyphSlot  slot,
                CFF_Size       size,
                FT_UShort      glyph_index,
                FT_Int32       load_flags )
    {
      FT_Error  error;
  
  
      if ( !slot )
        return CFF_Err_Invalid_Slot_Handle;
  
      /* check whether we want a scaled outline or bitmap */
      if ( !size )
        load_flags |= FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING;
  
      if ( load_flags & FT_LOAD_NO_SCALE )
        size = NULL;
  
      /* reset the size object if necessary */
      if ( size )
      {
        /* these two object must have the same parent */
        if ( size->face != slot->root.face )
          return CFF_Err_Invalid_Face_Handle;
      }
  
      /* now load the glyph outline if necessary */
      error = cff_slot_load( slot, size, glyph_index, load_flags );
  
      /* force drop-out mode to 2 - irrelevant now */
      /* slot->outline.dropout_mode = 2; */
  
      return error;
    }
  
  
   /*
    *  GLYPH DICT SERVICE
    *
    */
  
    static FT_Error
    cff_get_glyph_name( CFF_Face    face,
                        FT_UInt     glyph_index,
                        FT_Pointer  buffer,
                        FT_UInt     buffer_max )
    {
      CFF_Font            font   = (CFF_Font)face->extra.data;
      FT_Memory           memory = FT_FACE_MEMORY( face );
      FT_String*          gname;
      FT_UShort           sid;
      FT_Service_PsCMaps  psnames;
      FT_Error            error;
  
  
      FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS );
      if ( !psnames )
      {
        FT_ERROR(( "cff_get_glyph_name:" ));
        FT_ERROR(( " cannot get glyph name from CFF & CEF fonts\n" ));
        FT_ERROR(( "                   " ));
        FT_ERROR(( " without the `PSNames' module\n" ));
        error = CFF_Err_Unknown_File_Format;
        goto Exit;
      }
  
      /* first, locate the sid in the charset table */
      sid = font->charset.sids[glyph_index];
  
      /* now, lookup the name itself */
      gname = cff_index_get_sid_string( &font->string_index, sid, psnames );
  
      if ( gname && buffer_max > 0 )
      {
        FT_UInt  len = (FT_UInt)ft_strlen( gname );
  
  
        if ( len >= buffer_max )
          len = buffer_max - 1;
  
        FT_MEM_COPY( buffer, gname, len );
        ((FT_Byte*)buffer)[len] = 0;
      }
  
      FT_FREE( gname );
      error = CFF_Err_Ok;
  
      Exit:
        return error;
    }
  
  
    static FT_UInt
    cff_get_name_index( CFF_Face    face,
                        FT_String*  glyph_name )
    {
      CFF_Font            cff;
      CFF_Charset         charset;
      FT_Service_PsCMaps  psnames;
      FT_Memory           memory = FT_FACE_MEMORY( face );
      FT_String*          name;
      FT_UShort           sid;
      FT_UInt             i;
      FT_Int              result;
  
  
      cff     = (CFF_FontRec *)face->extra.data;
      charset = &cff->charset;
  
      FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS );
      if ( !psnames )
        return 0;
  
      for ( i = 0; i < cff->num_glyphs; i++ )
      {
        sid = charset->sids[i];
  
        if ( sid > 390 )
          name = cff_index_get_name( &cff->string_index, sid - 391 );
        else
          name = (FT_String *)psnames->adobe_std_strings( sid );
  
        result = ft_strcmp( glyph_name, name );
  
        if ( sid > 390 )
          FT_FREE( name );
  
        if ( !result )
          return i;
      }
  
      return 0;
    }
  
  
    static const FT_Service_GlyphDictRec  cff_service_glyph_dict =
    {
      (FT_GlyphDict_GetNameFunc)  cff_get_glyph_name,
      (FT_GlyphDict_NameIndexFunc)cff_get_name_index,
    };
  
  
   /*
    *  POSTSCRIPT INFO SERVICE
    *
    */
  
    static FT_Int
    cff_ps_has_glyph_names( FT_Face  face )
    {
      return ( face->face_flags & FT_FACE_FLAG_GLYPH_NAMES ) > 0;
    }
  
  
    static const FT_Service_PsInfoRec  cff_service_ps_info =
    {
      (PS_GetFontInfoFunc)  NULL,         /* unsupported with CFF fonts */
      (PS_HasGlyphNamesFunc)cff_ps_has_glyph_names
    };
  
  
    /*
     *  (empty) TT CMAP INFO
     *
     *  Hide TT CMAP INFO service defined in SFNT module;
     *  just return 0.
     *
     */
  
    static FT_Error
    cff_get_cmap_info( FT_CharMap    charmap,
                       TT_CMapInfo  *cmap_info )
    {
      FT_UNUSED( charmap );
  
      cmap_info->language = 0;
  
      return CFF_Err_Ok;
    }
  
  
    static const FT_Service_TTCMapsRec  cff_service_get_cmap_info =
    {
      (TT_CMap_Info_GetFunc)cff_get_cmap_info
    };
  
  
    /*************************************************************************/
    /*************************************************************************/
    /*************************************************************************/
    /****                                                                 ****/
    /****                                                                 ****/
    /****                D R I V E R  I N T E R F A C E                   ****/
    /****                                                                 ****/
    /****                                                                 ****/
    /*************************************************************************/
    /*************************************************************************/
    /*************************************************************************/
  
    static const FT_ServiceDescRec  cff_services[] =
    {
      { FT_SERVICE_ID_XF86_NAME,       FT_XF86_FORMAT_CFF },
      { FT_SERVICE_ID_POSTSCRIPT_INFO, &cff_service_ps_info },
  #ifndef FT_CONFIG_OPTION_NO_GLYPH_NAMES
      { FT_SERVICE_ID_GLYPH_DICT,      &cff_service_glyph_dict },
  #endif
      { FT_SERVICE_ID_TT_CMAP,         &cff_service_get_cmap_info },
      { NULL, NULL }
    };
  
  
    static FT_Module_Interface
    cff_get_interface( CFF_Driver   driver,
                       const char*  module_interface )
    {
      FT_Module            sfnt;
      FT_Module_Interface  result;
  
  
      result = ft_service_list_lookup( cff_services, module_interface );
      if ( result != NULL )
        return  result;
  
      /* we pass our request to the `sfnt' module */
      sfnt = FT_Get_Module( driver->root.root.library, "sfnt" );
  
      return sfnt ? sfnt->clazz->get_interface( sfnt, module_interface ) : 0;
    }
  
  
    /* The FT_DriverInterface structure is defined in ftdriver.h. */
  
    FT_CALLBACK_TABLE_DEF
    const FT_Driver_ClassRec  cff_driver_class =
    {
      /* begin with the FT_Module_Class fields */
      {
        FT_MODULE_FONT_DRIVER       |
        FT_MODULE_DRIVER_SCALABLE   |
        FT_MODULE_DRIVER_HAS_HINTER,
  
        sizeof( CFF_DriverRec ),
        "cff",
        0x10000L,
        0x20000L,
  
        0,   /* module-specific interface */
  
        (FT_Module_Constructor)cff_driver_init,
        (FT_Module_Destructor) cff_driver_done,
        (FT_Module_Requester)  cff_get_interface,
      },
  
      /* now the specific driver fields */
      sizeof( TT_FaceRec ),
      sizeof( FT_SizeRec ),
      sizeof( CFF_GlyphSlotRec ),
  
      (FT_Face_InitFunc)       cff_face_init,
      (FT_Face_DoneFunc)       cff_face_done,
      (FT_Size_InitFunc)       cff_size_init,
      (FT_Size_DoneFunc)       cff_size_done,
      (FT_Slot_InitFunc)       cff_slot_init,
      (FT_Slot_DoneFunc)       cff_slot_done,
  
      (FT_Size_ResetPointsFunc)cff_size_reset,
      (FT_Size_ResetPixelsFunc)cff_size_reset,
  
      (FT_Slot_LoadFunc)       Load_Glyph,
  
      (FT_Face_GetKerningFunc) Get_Kerning,
      (FT_Face_AttachFunc)     0,
      (FT_Face_GetAdvancesFunc)0,
    };
  
  
  /* END */
  

Download