kc3-lang/freetype/src/type1/t1driver.c

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• Hash : 78a1e695
  Author :
  Date : 2018-11-27T22:24:06
  

  [type1,cff] Add FT_{Set,Get}_MM_WeightVector API calls. For multiple master fonts, common usage (in Postscript) is to modify the WeightVector of an existing font instance, this addition supports that use. * include/freetype/ftmm.h, src/base/ftmm.c (FT_Set_MM_WeightVector, FT_Get_MM_WeightVector): New API functions. * include/freetype/internalservices/svmm.h (FT_Set_MM_WeightVector_Func, FT_Get_MM_WeightVector_Func): New function types. (MultiMasters): Add `set_mm_weightvector' and `get_mm_weightvector' members. (FT_DEFINE_SERVICE_MULTIMASTERSREC): Updated. * src/cffcffdrivr.c (cff_set_mm_weightvector, cff_get_mm_weightvector): New functions. (cff_service_multi_masters): Register them. * src/truetype/ttdriver.c (tt_service_gx_multi_masters): Updated. This driver doesn't use the new interface. * src/type1/t1load.c (T1_Set_MM_WeightVector, T1_Get_MM_WeightVector): New functions. * src/type1/t1driver.c (t1_service_multi_masters): Register them. * src/type1/t1load.h: Updated.

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• src/type1/t1driver.c

• /****************************************************************************
   *
   * t1driver.c
   *
   *   Type 1 driver interface (body).
   *
   * Copyright 1996-2018 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 "t1driver.h"
  #include "t1gload.h"
  #include "t1load.h"
  
  #include "t1errors.h"
  
  #ifndef T1_CONFIG_OPTION_NO_AFM
  #include "t1afm.h"
  #endif
  
  #include FT_INTERNAL_DEBUG_H
  #include FT_INTERNAL_STREAM_H
  #include FT_INTERNAL_HASH_H
  #include FT_INTERNAL_POSTSCRIPT_PROPS_H
  #include FT_DRIVER_H
  
  #include FT_SERVICE_MULTIPLE_MASTERS_H
  #include FT_SERVICE_GLYPH_DICT_H
  #include FT_SERVICE_FONT_FORMAT_H
  #include FT_SERVICE_POSTSCRIPT_NAME_H
  #include FT_SERVICE_POSTSCRIPT_CMAPS_H
  #include FT_SERVICE_POSTSCRIPT_INFO_H
  #include FT_SERVICE_PROPERTIES_H
  #include FT_SERVICE_KERNING_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  t1driver
  
    /*
     * GLYPH DICT SERVICE
     *
     */
  
    static FT_Error
    t1_get_glyph_name( T1_Face     face,
                       FT_UInt     glyph_index,
                       FT_Pointer  buffer,
                       FT_UInt     buffer_max )
    {
      FT_STRCPYN( buffer, face->type1.glyph_names[glyph_index], buffer_max );
  
      return FT_Err_Ok;
    }
  
  
    static FT_UInt
    t1_get_name_index( T1_Face     face,
                       FT_String*  glyph_name )
    {
      FT_Int  i;
  
  
      for ( i = 0; i < face->type1.num_glyphs; i++ )
      {
        FT_String*  gname = face->type1.glyph_names[i];
  
  
        if ( !ft_strcmp( glyph_name, gname ) )
          return (FT_UInt)i;
      }
  
      return 0;
    }
  
  
    static const FT_Service_GlyphDictRec  t1_service_glyph_dict =
    {
      (FT_GlyphDict_GetNameFunc)  t1_get_glyph_name,    /* get_name   */
      (FT_GlyphDict_NameIndexFunc)t1_get_name_index     /* name_index */
    };
  
  
    /*
     * POSTSCRIPT NAME SERVICE
     *
     */
  
    static const char*
    t1_get_ps_name( T1_Face  face )
    {
      return (const char*) face->type1.font_name;
    }
  
  
    static const FT_Service_PsFontNameRec  t1_service_ps_name =
    {
      (FT_PsName_GetFunc)t1_get_ps_name     /* get_ps_font_name */
    };
  
  
    /*
     * MULTIPLE MASTERS SERVICE
     *
     */
  
  #ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT
    static const FT_Service_MultiMastersRec  t1_service_multi_masters =
    {
      (FT_Get_MM_Func)             T1_Get_Multi_Master,    /* get_mm              */
      (FT_Set_MM_Design_Func)      T1_Set_MM_Design,       /* set_mm_design       */
      (FT_Set_MM_Blend_Func)       T1_Set_MM_Blend,        /* set_mm_blend        */
      (FT_Get_MM_Blend_Func)       T1_Get_MM_Blend,        /* get_mm_blend        */
      (FT_Get_MM_Var_Func)         T1_Get_MM_Var,          /* get_mm_var          */
      (FT_Set_Var_Design_Func)     T1_Set_Var_Design,      /* set_var_design      */
      (FT_Get_Var_Design_Func)     T1_Get_Var_Design,      /* get_var_design      */
      (FT_Set_Instance_Func)       T1_Reset_MM_Blend,      /* set_instance        */
      (FT_Set_MM_WeightVector_Func)T1_Set_MM_WeightVector, /* set_mm_weightvector */
      (FT_Get_MM_WeightVector_Func)T1_Get_MM_WeightVector, /* get_mm_weightvector */
  
      (FT_Get_Var_Blend_Func)      NULL,                   /* get_var_blend       */
      (FT_Done_Blend_Func)         T1_Done_Blend           /* done_blend          */
    };
  #endif
  
  
    /*
     * POSTSCRIPT INFO SERVICE
     *
     */
  
    static FT_Error
    t1_ps_get_font_info( FT_Face          face,
                         PS_FontInfoRec*  afont_info )
    {
      *afont_info = ((T1_Face)face)->type1.font_info;
  
      return FT_Err_Ok;
    }
  
  
    static FT_Error
    t1_ps_get_font_extra( FT_Face           face,
                          PS_FontExtraRec*  afont_extra )
    {
      *afont_extra = ((T1_Face)face)->type1.font_extra;
  
      return FT_Err_Ok;
    }
  
  
    static FT_Int
    t1_ps_has_glyph_names( FT_Face  face )
    {
      FT_UNUSED( face );
  
      return 1;
    }
  
  
    static FT_Error
    t1_ps_get_font_private( FT_Face         face,
                            PS_PrivateRec*  afont_private )
    {
      *afont_private = ((T1_Face)face)->type1.private_dict;
  
      return FT_Err_Ok;
    }
  
  
    static FT_Long
    t1_ps_get_font_value( FT_Face       face,
                          PS_Dict_Keys  key,
                          FT_UInt       idx,
                          void         *value,
                          FT_Long       value_len_ )
    {
      FT_ULong  retval    = 0; /* always >= 1 if valid */
      FT_ULong  value_len = value_len_ < 0 ? 0 : (FT_ULong)value_len_;
  
      T1_Face  t1face = (T1_Face)face;
      T1_Font  type1  = &t1face->type1;
  
  
      switch ( key )
      {
      case PS_DICT_FONT_TYPE:
        retval = sizeof ( type1->font_type );
        if ( value && value_len >= retval )
          *((FT_Byte *)value) = type1->font_type;
        break;
  
      case PS_DICT_FONT_MATRIX:
        if ( idx < sizeof ( type1->font_matrix ) /
                     sizeof ( type1->font_matrix.xx ) )
        {
          FT_Fixed  val = 0;
  
  
          retval = sizeof ( val );
          if ( value && value_len >= retval )
          {
            switch ( idx )
            {
            case 0:
              val = type1->font_matrix.xx;
              break;
            case 1:
              val = type1->font_matrix.xy;
              break;
            case 2:
              val = type1->font_matrix.yx;
              break;
            case 3:
              val = type1->font_matrix.yy;
              break;
            }
            *((FT_Fixed *)value) = val;
          }
        }
        break;
  
      case PS_DICT_FONT_BBOX:
        if ( idx < sizeof ( type1->font_bbox ) /
                     sizeof ( type1->font_bbox.xMin ) )
        {
          FT_Fixed  val = 0;
  
  
          retval = sizeof ( val );
          if ( value && value_len >= retval )
          {
            switch ( idx )
            {
            case 0:
              val = type1->font_bbox.xMin;
              break;
            case 1:
              val = type1->font_bbox.yMin;
              break;
            case 2:
              val = type1->font_bbox.xMax;
              break;
            case 3:
              val = type1->font_bbox.yMax;
              break;
            }
            *((FT_Fixed *)value) = val;
          }
        }
        break;
  
      case PS_DICT_PAINT_TYPE:
        retval = sizeof ( type1->paint_type );
        if ( value && value_len >= retval )
          *((FT_Byte *)value) = type1->paint_type;
        break;
  
      case PS_DICT_FONT_NAME:
        if ( type1->font_name )
        {
          retval = ft_strlen( type1->font_name ) + 1;
          if ( value && value_len >= retval )
            ft_memcpy( value, (void *)( type1->font_name ), retval );
        }
        break;
  
      case PS_DICT_UNIQUE_ID:
        retval = sizeof ( type1->private_dict.unique_id );
        if ( value && value_len >= retval )
          *((FT_Int *)value) = type1->private_dict.unique_id;
        break;
  
      case PS_DICT_NUM_CHAR_STRINGS:
        retval = sizeof ( type1->num_glyphs );
        if ( value && value_len >= retval )
          *((FT_Int *)value) = type1->num_glyphs;
        break;
  
      case PS_DICT_CHAR_STRING_KEY:
        if ( idx < (FT_UInt)type1->num_glyphs )
        {
          retval = ft_strlen( type1->glyph_names[idx] ) + 1;
          if ( value && value_len >= retval )
          {
            ft_memcpy( value, (void *)( type1->glyph_names[idx] ), retval );
            ((FT_Char *)value)[retval - 1] = (FT_Char)'\0';
          }
        }
        break;
  
      case PS_DICT_CHAR_STRING:
        if ( idx < (FT_UInt)type1->num_glyphs )
        {
          retval = type1->charstrings_len[idx] + 1;
          if ( value && value_len >= retval )
          {
            ft_memcpy( value, (void *)( type1->charstrings[idx] ),
                       retval - 1 );
            ((FT_Char *)value)[retval - 1] = (FT_Char)'\0';
          }
        }
        break;
  
      case PS_DICT_ENCODING_TYPE:
        retval = sizeof ( type1->encoding_type );
        if ( value && value_len >= retval )
          *((T1_EncodingType *)value) = type1->encoding_type;
        break;
  
      case PS_DICT_ENCODING_ENTRY:
        if ( type1->encoding_type == T1_ENCODING_TYPE_ARRAY &&
             idx < (FT_UInt)type1->encoding.num_chars       )
        {
          retval = ft_strlen( type1->encoding.char_name[idx] ) + 1;
          if ( value && value_len >= retval )
          {
            ft_memcpy( value, (void *)( type1->encoding.char_name[idx] ),
                       retval - 1 );
            ((FT_Char *)value)[retval - 1] = (FT_Char)'\0';
          }
        }
        break;
  
      case PS_DICT_NUM_SUBRS:
        retval = sizeof ( type1->num_subrs );
        if ( value && value_len >= retval )
          *((FT_Int *)value) = type1->num_subrs;
        break;
  
      case PS_DICT_SUBR:
        {
          FT_Bool  ok = 0;
  
  
          if ( type1->subrs_hash )
          {
            /* convert subr index to array index */
            size_t*  val = ft_hash_num_lookup( (FT_Int)idx,
                                               type1->subrs_hash );
  
  
            if ( val )
            {
              idx = *val;
              ok  = 1;
            }
          }
          else
          {
            if ( idx < (FT_UInt)type1->num_subrs )
              ok = 1;
          }
  
          if ( ok && type1->subrs )
          {
            retval = type1->subrs_len[idx] + 1;
            if ( value && value_len >= retval )
            {
              ft_memcpy( value, (void *)( type1->subrs[idx] ), retval - 1 );
              ((FT_Char *)value)[retval - 1] = (FT_Char)'\0';
            }
          }
        }
        break;
  
      case PS_DICT_STD_HW:
        retval = sizeof ( type1->private_dict.standard_width[0] );
        if ( value && value_len >= retval )
          *((FT_UShort *)value) = type1->private_dict.standard_width[0];
        break;
  
      case PS_DICT_STD_VW:
        retval = sizeof ( type1->private_dict.standard_height[0] );
        if ( value && value_len >= retval )
          *((FT_UShort *)value) = type1->private_dict.standard_height[0];
        break;
  
      case PS_DICT_NUM_BLUE_VALUES:
        retval = sizeof ( type1->private_dict.num_blue_values );
        if ( value && value_len >= retval )
          *((FT_Byte *)value) = type1->private_dict.num_blue_values;
        break;
  
      case PS_DICT_BLUE_VALUE:
        if ( idx < type1->private_dict.num_blue_values )
        {
          retval = sizeof ( type1->private_dict.blue_values[idx] );
          if ( value && value_len >= retval )
            *((FT_Short *)value) = type1->private_dict.blue_values[idx];
        }
        break;
  
      case PS_DICT_BLUE_SCALE:
        retval = sizeof ( type1->private_dict.blue_scale );
        if ( value && value_len >= retval )
          *((FT_Fixed *)value) = type1->private_dict.blue_scale;
        break;
  
      case PS_DICT_BLUE_FUZZ:
        retval = sizeof ( type1->private_dict.blue_fuzz );
        if ( value && value_len >= retval )
          *((FT_Int *)value) = type1->private_dict.blue_fuzz;
        break;
  
      case PS_DICT_BLUE_SHIFT:
        retval = sizeof ( type1->private_dict.blue_shift );
        if ( value && value_len >= retval )
          *((FT_Int *)value) = type1->private_dict.blue_shift;
        break;
  
      case PS_DICT_NUM_OTHER_BLUES:
        retval = sizeof ( type1->private_dict.num_other_blues );
        if ( value && value_len >= retval )
          *((FT_Byte *)value) = type1->private_dict.num_other_blues;
        break;
  
      case PS_DICT_OTHER_BLUE:
        if ( idx < type1->private_dict.num_other_blues )
        {
          retval = sizeof ( type1->private_dict.other_blues[idx] );
          if ( value && value_len >= retval )
            *((FT_Short *)value) = type1->private_dict.other_blues[idx];
        }
        break;
  
      case PS_DICT_NUM_FAMILY_BLUES:
        retval = sizeof ( type1->private_dict.num_family_blues );
        if ( value && value_len >= retval )
          *((FT_Byte *)value) = type1->private_dict.num_family_blues;
        break;
  
      case PS_DICT_FAMILY_BLUE:
        if ( idx < type1->private_dict.num_family_blues )
        {
          retval = sizeof ( type1->private_dict.family_blues[idx] );
          if ( value && value_len >= retval )
            *((FT_Short *)value) = type1->private_dict.family_blues[idx];
        }
        break;
  
      case PS_DICT_NUM_FAMILY_OTHER_BLUES:
        retval = sizeof ( type1->private_dict.num_family_other_blues );
        if ( value && value_len >= retval )
          *((FT_Byte *)value) = type1->private_dict.num_family_other_blues;
        break;
  
      case PS_DICT_FAMILY_OTHER_BLUE:
        if ( idx < type1->private_dict.num_family_other_blues )
        {
          retval = sizeof ( type1->private_dict.family_other_blues[idx] );
          if ( value && value_len >= retval )
            *((FT_Short *)value) = type1->private_dict.family_other_blues[idx];
        }
        break;
  
      case PS_DICT_NUM_STEM_SNAP_H:
        retval = sizeof ( type1->private_dict.num_snap_widths );
        if ( value && value_len >= retval )
          *((FT_Byte *)value) = type1->private_dict.num_snap_widths;
        break;
  
      case PS_DICT_STEM_SNAP_H:
        if ( idx < type1->private_dict.num_snap_widths )
        {
          retval = sizeof ( type1->private_dict.snap_widths[idx] );
          if ( value && value_len >= retval )
            *((FT_Short *)value) = type1->private_dict.snap_widths[idx];
        }
        break;
  
      case PS_DICT_NUM_STEM_SNAP_V:
        retval = sizeof ( type1->private_dict.num_snap_heights );
        if ( value && value_len >= retval )
          *((FT_Byte *)value) = type1->private_dict.num_snap_heights;
        break;
  
      case PS_DICT_STEM_SNAP_V:
        if ( idx < type1->private_dict.num_snap_heights )
        {
          retval = sizeof ( type1->private_dict.snap_heights[idx] );
          if ( value && value_len >= retval )
            *((FT_Short *)value) = type1->private_dict.snap_heights[idx];
        }
        break;
  
      case PS_DICT_RND_STEM_UP:
        retval = sizeof ( type1->private_dict.round_stem_up );
        if ( value && value_len >= retval )
          *((FT_Bool *)value) = type1->private_dict.round_stem_up;
        break;
  
      case PS_DICT_FORCE_BOLD:
        retval = sizeof ( type1->private_dict.force_bold );
        if ( value && value_len >= retval )
          *((FT_Bool *)value) = type1->private_dict.force_bold;
        break;
  
      case PS_DICT_MIN_FEATURE:
        if ( idx < sizeof ( type1->private_dict.min_feature ) /
                     sizeof ( type1->private_dict.min_feature[0] ) )
        {
          retval = sizeof ( type1->private_dict.min_feature[idx] );
          if ( value && value_len >= retval )
            *((FT_Short *)value) = type1->private_dict.min_feature[idx];
        }
        break;
  
      case PS_DICT_LEN_IV:
        retval = sizeof ( type1->private_dict.lenIV );
        if ( value && value_len >= retval )
          *((FT_Int *)value) = type1->private_dict.lenIV;
        break;
  
      case PS_DICT_PASSWORD:
        retval = sizeof ( type1->private_dict.password );
        if ( value && value_len >= retval )
          *((FT_Long *)value) = type1->private_dict.password;
        break;
  
      case PS_DICT_LANGUAGE_GROUP:
        retval = sizeof ( type1->private_dict.language_group );
        if ( value && value_len >= retval )
          *((FT_Long *)value) = type1->private_dict.language_group;
        break;
  
      case PS_DICT_IS_FIXED_PITCH:
        retval = sizeof ( type1->font_info.is_fixed_pitch );
        if ( value && value_len >= retval )
          *((FT_Bool *)value) = type1->font_info.is_fixed_pitch;
        break;
  
      case PS_DICT_UNDERLINE_POSITION:
        retval = sizeof ( type1->font_info.underline_position );
        if ( value && value_len >= retval )
          *((FT_Short *)value) = type1->font_info.underline_position;
        break;
  
      case PS_DICT_UNDERLINE_THICKNESS:
        retval = sizeof ( type1->font_info.underline_thickness );
        if ( value && value_len >= retval )
          *((FT_UShort *)value) = type1->font_info.underline_thickness;
        break;
  
      case PS_DICT_FS_TYPE:
        retval = sizeof ( type1->font_extra.fs_type );
        if ( value && value_len >= retval )
          *((FT_UShort *)value) = type1->font_extra.fs_type;
        break;
  
      case PS_DICT_VERSION:
        if ( type1->font_info.version )
        {
          retval = ft_strlen( type1->font_info.version ) + 1;
          if ( value && value_len >= retval )
            ft_memcpy( value, (void *)( type1->font_info.version ), retval );
        }
        break;
  
      case PS_DICT_NOTICE:
        if ( type1->font_info.notice )
        {
          retval = ft_strlen( type1->font_info.notice ) + 1;
          if ( value && value_len >= retval )
            ft_memcpy( value, (void *)( type1->font_info.notice ), retval );
        }
        break;
  
      case PS_DICT_FULL_NAME:
        if ( type1->font_info.full_name )
        {
          retval = ft_strlen( type1->font_info.full_name ) + 1;
          if ( value && value_len >= retval )
            ft_memcpy( value, (void *)( type1->font_info.full_name ), retval );
        }
        break;
  
      case PS_DICT_FAMILY_NAME:
        if ( type1->font_info.family_name )
        {
          retval = ft_strlen( type1->font_info.family_name ) + 1;
          if ( value && value_len >= retval )
            ft_memcpy( value, (void *)( type1->font_info.family_name ),
                       retval );
        }
        break;
  
      case PS_DICT_WEIGHT:
        if ( type1->font_info.weight )
        {
          retval = ft_strlen( type1->font_info.weight ) + 1;
          if ( value && value_len >= retval )
            ft_memcpy( value, (void *)( type1->font_info.weight ), retval );
        }
        break;
  
      case PS_DICT_ITALIC_ANGLE:
        retval = sizeof ( type1->font_info.italic_angle );
        if ( value && value_len >= retval )
          *((FT_Long *)value) = type1->font_info.italic_angle;
        break;
      }
  
      return retval == 0 ? -1 : (FT_Long)retval;
    }
  
  
    static const FT_Service_PsInfoRec  t1_service_ps_info =
    {
      (PS_GetFontInfoFunc)   t1_ps_get_font_info,    /* ps_get_font_info    */
      (PS_GetFontExtraFunc)  t1_ps_get_font_extra,   /* ps_get_font_extra   */
      (PS_HasGlyphNamesFunc) t1_ps_has_glyph_names,  /* ps_has_glyph_names  */
      (PS_GetFontPrivateFunc)t1_ps_get_font_private, /* ps_get_font_private */
      (PS_GetFontValueFunc)  t1_ps_get_font_value,   /* ps_get_font_value   */
    };
  
  
  #ifndef T1_CONFIG_OPTION_NO_AFM
    static const FT_Service_KerningRec  t1_service_kerning =
    {
      T1_Get_Track_Kerning,       /* get_track */
    };
  #endif
  
  
    /*
     * PROPERTY SERVICE
     *
     */
  
    FT_DEFINE_SERVICE_PROPERTIESREC(
      t1_service_properties,
  
      (FT_Properties_SetFunc)ps_property_set,      /* set_property */
      (FT_Properties_GetFunc)ps_property_get )     /* get_property */
  
  
    /*
     * SERVICE LIST
     *
     */
  
    static const FT_ServiceDescRec  t1_services[] =
    {
      { FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &t1_service_ps_name },
      { FT_SERVICE_ID_GLYPH_DICT,           &t1_service_glyph_dict },
      { FT_SERVICE_ID_FONT_FORMAT,          FT_FONT_FORMAT_TYPE_1 },
      { FT_SERVICE_ID_POSTSCRIPT_INFO,      &t1_service_ps_info },
      { FT_SERVICE_ID_PROPERTIES,           &t1_service_properties },
  
  #ifndef T1_CONFIG_OPTION_NO_AFM
      { FT_SERVICE_ID_KERNING,              &t1_service_kerning },
  #endif
  
  #ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT
      { FT_SERVICE_ID_MULTI_MASTERS,        &t1_service_multi_masters },
  #endif
      { NULL, NULL }
    };
  
  
    FT_CALLBACK_DEF( FT_Module_Interface )
    Get_Interface( FT_Module         module,
                   const FT_String*  t1_interface )
    {
      FT_UNUSED( module );
  
      return ft_service_list_lookup( t1_services, t1_interface );
    }
  
  
  #ifndef T1_CONFIG_OPTION_NO_AFM
  
    /**************************************************************************
     *
     * @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( FT_Face     t1face,        /* T1_Face */
                 FT_UInt     left_glyph,
                 FT_UInt     right_glyph,
                 FT_Vector*  kerning )
    {
      T1_Face  face = (T1_Face)t1face;
  
  
      kerning->x = 0;
      kerning->y = 0;
  
      if ( face->afm_data )
        T1_Get_Kerning( (AFM_FontInfo)face->afm_data,
                        left_glyph,
                        right_glyph,
                        kerning );
  
      return FT_Err_Ok;
    }
  
  
  #endif /* T1_CONFIG_OPTION_NO_AFM */
  
  
    FT_CALLBACK_TABLE_DEF
    const FT_Driver_ClassRec  t1_driver_class =
    {
      {
        FT_MODULE_FONT_DRIVER       |
        FT_MODULE_DRIVER_SCALABLE   |
        FT_MODULE_DRIVER_HAS_HINTER,
  
        sizeof ( PS_DriverRec ),
  
        "type1",
        0x10000L,
        0x20000L,
  
        NULL,    /* module-specific interface */
  
        T1_Driver_Init,           /* FT_Module_Constructor  module_init   */
        T1_Driver_Done,           /* FT_Module_Destructor   module_done   */
        Get_Interface,            /* FT_Module_Requester    get_interface */
      },
  
      sizeof ( T1_FaceRec ),
      sizeof ( T1_SizeRec ),
      sizeof ( T1_GlyphSlotRec ),
  
      T1_Face_Init,               /* FT_Face_InitFunc  init_face */
      T1_Face_Done,               /* FT_Face_DoneFunc  done_face */
      T1_Size_Init,               /* FT_Size_InitFunc  init_size */
      T1_Size_Done,               /* FT_Size_DoneFunc  done_size */
      T1_GlyphSlot_Init,          /* FT_Slot_InitFunc  init_slot */
      T1_GlyphSlot_Done,          /* FT_Slot_DoneFunc  done_slot */
  
      T1_Load_Glyph,              /* FT_Slot_LoadFunc  load_glyph */
  
  #ifdef T1_CONFIG_OPTION_NO_AFM
      NULL,                       /* FT_Face_GetKerningFunc   get_kerning  */
      NULL,                       /* FT_Face_AttachFunc       attach_file  */
  #else
      Get_Kerning,                /* FT_Face_GetKerningFunc   get_kerning  */
      T1_Read_Metrics,            /* FT_Face_AttachFunc       attach_file  */
  #endif
      T1_Get_Advances,            /* FT_Face_GetAdvancesFunc  get_advances */
  
      T1_Size_Request,            /* FT_Size_RequestFunc  request_size */
      NULL                        /* FT_Size_SelectFunc   select_size  */
    };
  
  
  /* END */
  

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