kc3-lang/freetype/src/type1z/t1load.c

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• Hash : d0079e66
  Author :
  Date : 2000-06-23T00:07:06
  

  improved the Type1 drivers to deal with the case where the lenIV field is set to -1 to indicate unencoded charstrings fixed some source code to prevent a compiler bug on IRIX fixed the module version's in the "type1z" driver

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• src/type1z/t1load.c

• /*******************************************************************
   *
   *  t1load.h                                                    2.0
   *
   *    Type1 Loader.
   *
   *  Copyright 1996-2000 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.
   *
   *
   *  This is the new and improved Type 1 data loader for FreeType 2.
   *  The old loader has several problems: it is slow, complex, difficult
   *  to maintain, and contains incredible hacks to make it accept some
   *  ill-formed Type 1 fonts without hiccup-ing. Moreover, about 5%
   *  of the Type 1 fonts on my machine still aren't loaded correctly
   *  by it.
   *
   *  This version is much simpler, much faster and also easier to
   *  read and maintain by a great order of magnitude. The idea behind
   *  it is to _not_ try to read the Type 1 token stream with a state
   *  machine (i.e. a Postscript-like interpreter) but rather to perform
   *  simple pattern-matching.
   *
   *  Indeed, nearly all data definitions follow a simple pattern
   *  like :
   *
   *      ..... /Field <data> ....
   *
   *  where <data> can be a number, a boolean, a string, or an
   *  array of numbers. There are a few exceptions, namely the
   *  encoding, font name, charstrings and subrs and they are
   *  handled with a special pattern-matching routine.
   *
   *  All other common cases are handled very simply. The matching
   *  rules are defined in the file "t1tokens.h" through the use
   *  of several macros calls PARSE_XXXX
   *
   *  This file is included twice here, the first time to generate
   *  parsing callback functions, the second to generate a table
   *  of keywords (with pointers to the associated callback).
   *
   *  The function "parse_dict" simply scans *linearly* a given
   *  dictionary (either the top-level or private one) and calls
   *  the appropriate callback when it encounters an immediate
   *  keyword.
   *
   *  This is by far the fastest way one can find to parse and read
   *  all data :-)
   *
   *  This led to tremendous code size reduction. Note that later,
   *  the glyph loader will also be _greatly_ simplified, and the
   *  automatic hinter will replace the clumsy "t1hinter"..
   *
   ******************************************************************/
  
  #include <freetype/internal/ftdebug.h>
  #include <freetype/config/ftconfig.h>
  #include <freetype/ftmm.h>
  
  #include <freetype/internal/t1types.h>
  #include <freetype/internal/t1errors.h>
  #include <t1load.h>
  #include <stdio.h>
  
  #undef  FT_COMPONENT
  #define FT_COMPONENT  trace_t1load
  
  #ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT
   /***************************************************************************/
   /***************************************************************************/
   /*****                                                                 *****/
   /*****                    MULTIPLE MASTERS SUPPORT                     *****/
   /*****                                                                 *****/
   /***************************************************************************/
   /***************************************************************************/
  
   static  FT_Error  t1_allocate_blend( T1_Face   face,
                                        FT_UInt   num_designs,
                                        FT_UInt   num_axis )
   {
     T1_Blend*  blend;
     FT_Memory  memory = face->root.memory;
     FT_Error   error  = 0;
     
     blend = face->blend;
     if (!blend)
     {
       if ( ALLOC( blend, sizeof(*blend) ) )
         goto Exit;
         
       face->blend = blend;
     }
     
     /* allocate design data if needed */
     if (num_designs > 0)
     {
       if (blend->num_designs == 0)
       {
         /* allocate the blend "private" and "font_info" dictionaries */
         if ( ALLOC_ARRAY( blend->font_infos[1], num_designs, T1_FontInfo ) ||
              ALLOC_ARRAY( blend->privates[1], num_designs, T1_Private )    ||
              ALLOC_ARRAY( blend->weight_vector, num_designs*2, FT_Fixed )  )
           goto Exit;
    
         blend->default_weight_vector = blend->weight_vector + num_designs;
  
         blend->font_infos[0] = &face->type1.font_info;
         blend->privates  [0] = &face->type1.private_dict;
         blend->num_designs   = num_designs;
       }
       else if (blend->num_designs != num_designs)
         goto Fail;
     }
     
     /* allocate axis data if needed */
     if (num_axis > 0)
     {
       if (blend->num_axis != 0 && blend->num_axis != num_axis)
         goto Fail;
         
       blend->num_axis = num_axis;
     }
     
     /* allocate the blend design pos table if needed */
     num_designs = blend->num_designs;
     num_axis    = blend->num_axis;
     if ( num_designs && num_axis && blend->design_pos[0] == 0)
     {
       FT_UInt  n;
       
       if ( ALLOC_ARRAY( blend->design_pos[0], num_designs*num_axis, FT_Fixed ) )
         goto Exit;
         
       for ( n = 1; n < num_designs; n++ )
         blend->design_pos[n] = blend->design_pos[0] + num_axis*n;       
     }
     
   Exit:
     return error;
   Fail:
     error = -1;
     goto Exit;
   }                                  
  
   LOCAL_FUNC  FT_Error  T1_Get_Multi_Master( T1_Face          face,
                                              FT_Multi_Master* master )
   {
     T1_Blend*  blend = face->blend;
     FT_UInt    n;
     FT_Error   error;
     
     error = T1_Err_Invalid_Argument;
     if (blend)
     {
       master->num_axis    = blend->num_axis;
       master->num_designs = blend->num_designs;
       for ( n = 0; n < blend->num_axis; n++ )
       {
         FT_MM_Axis*    axis = master->axis + n;
         T1_DesignMap*  map = blend->design_map + n;
         
         axis->name    = blend->axis_names[n];
         axis->minimum = map->design_points[0];
         axis->maximum = map->design_points[map->num_points-1];
       }
       error = 0;
     }
     return error;
   }                                            
  
  
   LOCAL_FUNC  FT_Error  T1_Set_MM_Blend( T1_Face    face,
                                          FT_UInt    num_coords,
                                          FT_Fixed*  coords )
   {
     T1_Blend*  blend = face->blend;
     FT_Error   error;
     FT_UInt    n, m;
     
     error = T1_Err_Invalid_Argument;
     if (blend && blend->num_axis == num_coords)
     {
       /* recompute the weight vector from the blend coordinates */
       error = 0;
       for ( n = 0; n < blend->num_designs; n++ )
       {
         FT_Fixed  result = 0x10000L;  /* 1.0 fixed */
         for ( m = 0; m < blend->num_axis; m++ )
         {
           FT_Fixed  factor;
  
           /* get current blend axis position */
           factor = coords[m];
           if (factor < 0) factor = 0;
           if (factor > 0x10000L) factor = 0x10000L;
           
           if ((n & (1 << m)) == 0)
             factor = 0x10000L - factor;
             
           result = FT_MulFix( result, factor );
         }
         blend->weight_vector[n] = result;
       }
       error = 0;
     }
     return error;
   }
   
  
   LOCAL_FUNC  FT_Error  T1_Set_MM_Design( T1_Face   face,
                                           FT_UInt   num_coords,
                                           FT_Long*  coords )
   {
     T1_Blend*  blend = face->blend;
     FT_Error   error;
     FT_UInt    n, p;
     
     error = T1_Err_Invalid_Argument;
     if (blend && blend->num_axis == num_coords)
     {
       /* compute the blend coordinates through the blend design map */
       FT_Fixed  final_blends[ T1_MAX_MM_DESIGNS ];
       
       for ( n = 0; n < blend->num_axis; n++ )
       {
         FT_Long        design = coords[n];
         FT_Fixed       the_blend;
         T1_DesignMap*  map     = blend->design_map + n;
         FT_Fixed*      designs = map->design_points;
         FT_Fixed*      blends  = map->blend_points;
         FT_Int         before = -1, after = -1;
         
         for ( p = 0; p < map->num_points; p++ )
         {
           FT_Fixed  p_design = designs[p];
           
           /* exact match ? */
           if (design == p_design)
           {
             the_blend = blends[p];
             goto Found;
           }
           
           if (design < p_design)
           {
             after = p;
             break;
           }
           
           before = p;
         }
         
         /* now, interpolate if needed */
         if (before < 0)
           the_blend = blends[0];
           
         else if (after < 0)
           the_blend = blends[map->num_points-1];
           
         else
           the_blend = FT_MulDiv( design         - designs[before],
                                  blends [after] - blends [before],
                                  designs[after] - designs[before] );
       Found:
         final_blends[n] = the_blend;
       }
  
       error = T1_Set_MM_Blend( face, num_coords, final_blends );     
     }
     return error;
   }
  
   
   LOCAL_FUNC  void T1_Done_Blend( T1_Face  face )
   {
     FT_Memory  memory = face->root.memory;
     T1_Blend*  blend  = face->blend;
     
     if (blend)
     {
       FT_UInt  num_designs = blend->num_designs;
       FT_UInt  num_axis    = blend->num_axis;
       FT_UInt  n;
            
       /* release design pos table */
       FREE( blend->design_pos[0] );
       for ( n = 1; n < num_designs; n++ )
         blend->design_pos[n] = 0;
  
       /* release blend "private" and "font info" dictionaries */
       FREE( blend->privates[1] );
       FREE( blend->font_infos[1] );
       for ( n = 0; n < num_designs; n++ )
       {
         blend->privates  [n] = 0;
         blend->font_infos[n] = 0;
       }
  
       /* release weight vectors */
       FREE( blend->weight_vector );
       blend->default_weight_vector = 0;
  
       /* release axis names */
       for ( n = 0; n < num_axis; n++ )
         FREE( blend->axis_names[n] );
       
       /* release design map */
       for ( n = 0; n < num_axis; n++ )
       {
         T1_DesignMap*  dmap = blend->design_map + n;
         FREE( dmap->design_points );
         dmap->num_points = 0;
       }
       
       FREE( face->blend );
     }
   }
  
  
  
   static  void  parse_blend_axis_types( T1_Face  face, T1_Loader*  loader )
   {
     T1_Token_Rec  axis_tokens[ T1_MAX_MM_AXIS ];
     FT_Int        n, num_axis;
     FT_Error      error = 0;
     T1_Blend*     blend;
     FT_Memory     memory;
  
     /* take an array of objects */
     T1_ToTokenArray( &loader->parser, axis_tokens, T1_MAX_MM_AXIS, &num_axis );
     if (num_axis <= 0 || num_axis > T1_MAX_MM_AXIS)
     {
       FT_ERROR(( "T1.parse_blend_axis_types: incorrect number of axis: %d\n",
                  num_axis ));
       error = T1_Err_Invalid_File_Format;
       goto Exit;
     }
     
     /* allocate blend if necessary */
     error = t1_allocate_blend( face, 0, (FT_UInt)num_axis );
     if (error) goto Exit;
     
     blend  = face->blend;
     memory = face->root.memory;
     
     /* each token is an immediate containing the name of the axis */
     for ( n = 0; n < num_axis; n++ )
     {
       T1_Token_Rec*  token = axis_tokens + n;
       FT_Byte*       name;
       FT_Int         len;
       
       /* skip first slash, if any */
       if (token->start[0] == '/')
         token->start++;
         
       len = token->limit - token->start;
       if (len <= 0)
       {
         error = T1_Err_Invalid_File_Format;
         goto Exit;
       }
         
       if ( ALLOC( blend->axis_names[n], len+1 ) )
         goto Exit;
       
       name = (FT_Byte*)blend->axis_names[n];
       MEM_Copy( name, token->start, len );
       name[len] = 0;
     }
  
   Exit:   
     loader->parser.error = error;
   }
   
   
   static void  parse_blend_design_positions( T1_Face  face, T1_Loader*  loader )
   {
     T1_Token_Rec  design_tokens[ T1_MAX_MM_DESIGNS ];
     FT_Int        num_designs;
     FT_Int        num_axis;
     T1_Parser*    parser = &loader->parser;
     
     FT_Error      error = 0;
     T1_Blend*     blend;
  
     /* get the array of design tokens - compute number of designs */   
     T1_ToTokenArray( parser, design_tokens, T1_MAX_MM_DESIGNS, &num_designs );
     if (num_designs <= 0 || num_designs > T1_MAX_MM_DESIGNS)
     {
       FT_ERROR(( "T1.design positions: incorrect number of designs: %d\n",
                  num_designs ));
       error = T1_Err_Invalid_File_Format;
       goto Exit;
     }
     
     {
       FT_Byte*  old_cursor = parser->cursor;
       FT_Byte*  old_limit  = parser->limit;
       FT_UInt   n;
  
       blend    = face->blend;
       num_axis = 0;  /* make compiler happy */
       for ( n = 0; n < (FT_UInt)num_designs; n++ )
       {
         T1_Token_Rec  axis_tokens[ T1_MAX_MM_DESIGNS ];
         T1_Token_Rec* token;
         FT_Int        axis, n_axis;
  
         /* read axis/coordinates tokens */
         token = design_tokens + n;
         parser->cursor = token->start - 1;
         parser->limit  = token->limit + 1;
         T1_ToTokenArray( parser, axis_tokens, T1_MAX_MM_AXIS, &n_axis );
         
         if (n == 0)
         {
           num_axis = n_axis;
           error = t1_allocate_blend( face, num_designs, num_axis );
           if (error) goto Exit;
           blend = face->blend;
         }
         else if (n_axis != num_axis)
         {
           FT_ERROR(( "T1.design_positions: incorrect table\n" ));
           error = T1_Err_Invalid_File_Format;
           goto Exit;
         }
         
         /* now, read each axis token into the design position */
         for (axis = 0; axis < n_axis; axis++ )
         {
           T1_Token_Rec*  token2 = axis_tokens + axis;
           parser->cursor = token2->start;
           parser->limit  = token2->limit;
           blend->design_pos[n][axis] = T1_ToFixed( parser, 0 );
         }
       }
       
       loader->parser.cursor = old_cursor;
       loader->parser.limit  = old_limit;
     }
     
   Exit:
     loader->parser.error = error;
   }
  
   static void  parse_blend_design_map( T1_Face  face, T1_Loader*  loader )
   {
     FT_Error      error  = 0;
     T1_Parser*    parser = &loader->parser;
     T1_Blend*     blend;
     T1_Token_Rec  axis_tokens[ T1_MAX_MM_AXIS ];
     FT_Int        n, num_axis;
     FT_Byte*      old_cursor;
     FT_Byte*      old_limit;
     FT_Memory     memory = face->root.memory;
     
     T1_ToTokenArray( parser, axis_tokens, T1_MAX_MM_AXIS, &num_axis );
     if (num_axis <= 0 || num_axis > T1_MAX_MM_AXIS)
     {
       FT_ERROR(( "T1.design map: incorrect number of axis: %d\n",
                  num_axis ));
       error = T1_Err_Invalid_File_Format;
       goto Exit;
     }
     old_cursor = parser->cursor;
     old_limit  = parser->limit;
  
     error = t1_allocate_blend( face, 0, num_axis );
     if (error) goto Exit;
     blend = face->blend;
  
     /* now, read each axis design map */
     for ( n = 0; n < num_axis; n++ )
     {
       T1_DesignMap*   map = blend->design_map + n;
       T1_Token_Rec*   token;
       FT_Int          p, num_points;
       
       token = axis_tokens + n;
       parser->cursor = token->start;
       parser->limit  = token->limit;
       
       /* count the number of map points */
       {
         FT_Byte*  p     = token->start;
         FT_Byte*  limit = token->limit;
         
         num_points = 0;
         for ( ; p < limit; p++ )
           if (p[0] == '[')
             num_points++;
       }
       if (num_points <= 0 || num_points > T1_MAX_MM_MAP_POINTS)
       {
         FT_ERROR(( "T1.design map: incorrect table\n" ));
         error = T1_Err_Invalid_File_Format;
         goto Exit;
       }
       
       /* allocate design map data */
       if ( ALLOC_ARRAY( map->design_points, num_points*2, FT_Fixed ) )
         goto Exit;
       map->blend_points = map->design_points + num_points;
       map->num_points   = (FT_Byte)num_points;
       
       for ( p = 0; p < num_points; p++ )
       {
         map->design_points[p] = T1_ToInt( parser );
         map->blend_points [p] = T1_ToFixed( parser, 0 );
       }
     }   
     
     parser->cursor = old_cursor;
     parser->limit  = old_limit;
   Exit:
     parser->error = error;
   }
  
   static void parse_weight_vector( T1_Face   face, T1_Loader*  loader )
   {
     FT_Error      error  = 0;
     T1_Parser*    parser = &loader->parser;
     T1_Blend*     blend  = face->blend;
     T1_Token_Rec  master;
     FT_UInt       n;
     FT_Byte*      old_cursor;
     FT_Byte*      old_limit;
     
     if (!blend || blend->num_designs == 0)
     {
       FT_ERROR(( "t1.weight_vector: too early !!\n" ));
       error = T1_Err_Invalid_File_Format;
       goto Exit;
     }
     
     T1_ToToken( parser, &master );
     if (master.type != t1_token_array)
     {
       FT_ERROR(( "t1.weight_vector: incorrect format !!\n" ));
       error = T1_Err_Invalid_File_Format;
       goto Exit;
     }
     
     old_cursor = parser->cursor;
     old_limit  = parser->limit;
  
     parser->cursor = master.start;
     parser->limit  = master.limit;
     for ( n = 0; n < blend->num_designs; n++ )
     {
       blend->default_weight_vector[n] =
       blend->weight_vector[n]         = T1_ToFixed( parser, 0 );
     }
     
     parser->cursor = old_cursor;
     parser->limit  = old_limit;
   Exit:
     parser->error = error;
   }
  
   /* the keyword /shareddict appears in some multiple master fonts with a lot */
   /* of Postscript garbage behind it (that's completely out of spec !!), we   */
   /* detect it and terminate the parsing                                      */
   static  void parse_shared_dict( T1_Face  face, T1_Loader*  loader )
   {
     T1_Parser*  parser = &loader->parser;
     
     UNUSED(face);
     
     parser->cursor = parser->limit;
     parser->error  = 0;
   }
  #endif
   
   /***************************************************************************/
   /***************************************************************************/
   /*****                                                                 *****/
   /*****                      TYPE 1 SYMBOL PARSING                      *****/
   /*****                                                                 *****/
   /***************************************************************************/
   /***************************************************************************/
  
   /*********************************************************************
    *
    *  First of all, define the token field static variables. This is
    *  a set of T1_Field_Rec variables used later..
    *
    *********************************************************************/
  
  #define T1_NEW_STRING( _name, _field ) \
     static const  T1_Field_Rec  t1_field_ ## _field = T1_FIELD_STRING( T1TYPE, _field );
  
  #define T1_NEW_BOOL( _name, _field )   \
     static const  T1_Field_Rec  t1_field_ ## _field = T1_FIELD_BOOL( T1TYPE, _field );
     
  #define T1_NEW_NUM( _name, _field )    \
     static const  T1_Field_Rec  t1_field_ ## _field = T1_FIELD_NUM( T1TYPE, _field );
     
  #define T1_NEW_FIXED( _name, _field )  \
     static const  T1_Field_Rec  t1_field_ ## _field = T1_FIELD_FIXED( T1TYPE, _field, _power );
  
  #define T1_NEW_NUM_TABLE( _name, _field, _max, _count ) \
     static const  T1_Field_Rec  t1_field_ ## _field = T1_FIELD_NUM_ARRAY( T1TYPE, _field, _count, _max );
     
  #define T1_NEW_FIXED_TABLE( _name, _field, _max, _count ) \
     static const  T1_Field_Rec  t1_field_ ## _field = T1_FIELD_FIXED_ARRAY( T1TYPE, _field, _count, _max );
  
  #define T1_NEW_NUM_TABLE2( _name, _field, _max ) \
     static const  T1_Field_Rec  t1_field_ ## _field = T1_FIELD_NUM_ARRAY2( T1TYPE, _field, _max );
     
  #define T1_NEW_FIXED_TABLE2( _name, _field, _max ) \
     static const  T1_Field_Rec  t1_field_ ## _field = T1_FIELD_FIXED_ARRAY2( T1TYPE, _field, _max );
  
  
  #define T1_FONTINFO_STRING(n,f)        T1_NEW_STRING(n,f)
  #define T1_FONTINFO_NUM(n,f)           T1_NEW_NUM(n,f)
  #define T1_FONTINFO_BOOL(n,f)          T1_NEW_BOOL(n,f)
  #define T1_PRIVATE_NUM(n,f)            T1_NEW_NUM(n,f)
  #define T1_PRIVATE_FIXED(n,f)          T1_NEW_FIXED(n,f)
  #define T1_PRIVATE_NUM_TABLE(n,f,m,c)  T1_NEW_NUM_TABLE(n,f,m,c)
  #define T1_PRIVATE_NUM_TABLE2(n,f,m)   T1_NEW_NUM_TABLE2(n,f,m)
  #define T1_TOPDICT_NUM(n,f)            T1_NEW_NUM(n,f)
  #define T1_TOPDICT_NUM_FIXED2(n,f,m)   T1_NEW_FIXED_TABLE2(n,f,m)
  
  /* including this file defines all field variables */
  #include <t1tokens.h>
  
   /*********************************************************************
    *
    *  Second, define the keyword variables. This is a set of T1_KeyWord
    *  structures used to model the way each keyword is "loaded"..
    *
    *********************************************************************/
  
    typedef  void  (*T1_Parse_Func)( T1_Face   face, T1_Loader*  loader );
  
    typedef enum T1_KeyWord_Type_
    {
      t1_keyword_callback = 0,
      t1_keyword_field,
      t1_keyword_field_table
      
    } T1_KeyWord_Type;
    
    typedef enum T1_KeyWord_Location_
    {
      t1_keyword_type1 = 0,
      t1_keyword_font_info,
      t1_keyword_private
    
    } T1_KeyWord_Location;
    
    typedef  struct T1_KeyWord_
    {
      const char*          name;
      T1_KeyWord_Type      type;
      T1_KeyWord_Location  location;
      T1_Parse_Func        parsing;
      const T1_Field_Rec*  field;
  
    } T1_KeyWord;
  
  
  #define T1_KEYWORD_CALLBACK( name, callback )  \
           { name, t1_keyword_callback, t1_keyword_type1, callback, 0 }
  
  #define T1_KEYWORD_TYPE1( name, f ) \
           { name, t1_keyword_field, t1_keyword_type1, 0, &t1_field_ ## f }
           
  #define T1_KEYWORD_FONTINFO( name, f ) \
           { name, t1_keyword_field, t1_keyword_font_info, 0, &t1_field_ ## f }
  
  #define T1_KEYWORD_PRIVATE( name, f ) \
           { name, t1_keyword_field, t1_keyword_private, 0, &t1_field_ ## f }
  
  #define T1_KEYWORD_FONTINFO_TABLE( name, f ) \
           { name, t1_keyword_field_table, t1_keyword_font_info, 0, &t1_field_ ## f }
  
  #define T1_KEYWORD_PRIVATE_TABLE( name, f ) \
           { name, t1_keyword_field_table, t1_keyword_private, 0, &t1_field_ ## f }
  
  #undef  T1_FONTINFO_STRING
  #undef  T1_FONTINFO_NUM
  #undef  T1_FONTINFO_BOOL
  #undef  T1_PRIVATE_NUM
  #undef  T1_PRIVATE_FIXED
  #undef  T1_PRIVATE_NUM_TABLE
  #undef  T1_PRIVATE_NUM_TABLE2
  #undef  T1_TOPDICT_NUM
  #undef  T1_TOPDICT_NUM_FIXED2
  
  #define T1_FONTINFO_STRING(n,f)        T1_KEYWORD_FONTINFO(n,f),
  #define T1_FONTINFO_NUM(n,f)           T1_KEYWORD_FONTINFO(n,f),
  #define T1_FONTINFO_BOOL(n,f)          T1_KEYWORD_FONTINFO(n,f),
  #define T1_PRIVATE_NUM(n,f)            T1_KEYWORD_PRIVATE(n,f),
  #define T1_PRIVATE_FIXED(n,f)          T1_KEYWORD_PRIVATE(n,f),
  #define T1_PRIVATE_NUM_TABLE(n,f,m,c)  T1_KEYWORD_PRIVATE_TABLE(n,f),
  #define T1_PRIVATE_NUM_TABLE2(n,f,m)   T1_KEYWORD_PRIVATE_TABLE(n,f),
  #define T1_TOPDICT_NUM(n,f)            T1_KEYWORD_TYPE1(n,f),
  #define T1_TOPDICT_NUM_FIXED2(n,f,m)   T1_KEYWORD_TYPE1(n,f),
  
  
    static  FT_Error   t1_load_keyword( T1_Face     face,
                                        T1_Loader*  loader,
                                        T1_KeyWord* keyword )
    {
      FT_Error  error;
      void*     dummy_object;
      void**    objects;
      FT_UInt   max_objects;
      T1_Blend* blend = face->blend;
      
      /* if the keyword has a dedicated callback, call it */
      if (keyword->type == t1_keyword_callback)
      {
        keyword->parsing( face, loader );
        error = loader->parser.error;
        goto Exit;
      }
      
      /* now, the keyword is either a simple field, or a table of fields */
      /* we are now going to take care of it..                           */
      switch (keyword->location)
      {
        case t1_keyword_font_info:
          {
            dummy_object = &face->type1.font_info;
            objects      = &dummy_object;
            max_objects  = 0;
            if (blend)
            {
              objects     = (void**)blend->font_infos;
              max_objects = blend->num_designs;
            }
          }
          break;
          
        case t1_keyword_private:
          {
            dummy_object = &face->type1.private_dict;
            objects      = &dummy_object;
            max_objects  = 0;
            if (blend)
            {
              objects     = (void**)blend->privates;
              max_objects = blend->num_designs;
            }
          }
          break;
        
        default:
          dummy_object = &face->type1;
          objects      = &dummy_object;
          max_objects  = 0;
      }
      
      if (keyword->type == t1_keyword_field_table)
        error = T1_Load_Field_Table( &loader->parser, keyword->field, objects, max_objects, 0 );
      else
        error = T1_Load_Field( &loader->parser, keyword->field, objects, max_objects, 0 );
      
    Exit:
      return error;
    }                                
  
  
    static
    int  is_space( char c )
    {
      return ( c == ' ' || c == '\t' || c == '\r' || c == '\n' );
    }
  
    static
    int  is_alpha( char c )
    {
      return ( (c >= 'A' && c <= 'Z') ||
               (c >= 'a' && c <= 'z') ||
               (c >= '0' && c <= '9') ||
               (c == '.')             ||
               (c == '_') );
    }
  
    static
    void  skip_whitespace( T1_Parser* parser )
    {
      FT_Byte*  cur = parser->cursor;
  
      while ( cur < parser->limit && is_space(*cur) )
        cur++;
  
      parser->cursor = cur;
    }
  
    static
    void skip_blackspace( T1_Parser* parser )
    {
      FT_Byte*  cur = parser->cursor;
  
      while ( cur < parser->limit && !is_space(*cur) )
        cur++;
  
      parser->cursor = cur;
    }
  
    static
    int   read_binary_data( T1_Parser*  parser, FT_Int *size, FT_Byte* *base )
    {
      FT_Byte*  cur;
      FT_Byte*  limit = parser->limit;
  
      /* the binary data has the following format */
      /*                                          */
      /* "size" [white*] RD white ....... ND      */
      /*                                          */
  
      skip_whitespace(parser);
      cur = parser->cursor;
  
      if ( cur < limit && (FT_Byte)(*cur-'0') < 10 )
      {
        *size = T1_ToInt(parser);
  
        skip_whitespace(parser);
        skip_blackspace(parser);  /* "RD" or "-|" or something else */
  
        /* there is only one whitespace char after the */
        /* "RD" or "-|" token                          */
        *base = parser->cursor + 1;
  
        parser->cursor += *size+1;
        return 1;
      }
  
      FT_ERROR(( "type1.read_binary_data: invalid size field\n" ));
      parser->error = T1_Err_Invalid_File_Format;
      return 0;
    }
  
  
    /* we will now define the routines used to handle */
    /* the /Encoding, /Subrs and /CharStrings         */
    /* dictionaries..                                 */
  
    static
    void  parse_font_name( T1_Face  face, T1_Loader*  loader )
    {
      T1_Parser*  parser = &loader->parser;
      FT_Error    error;
      FT_Memory   memory = parser->memory;
      FT_Int      len;
      FT_Byte*    cur;
      FT_Byte*    cur2;
      FT_Byte*    limit;
  
      skip_whitespace(parser);
      cur   = parser->cursor;
      limit = parser->limit;
      if ( cur >= limit-1 || *cur != '/' ) return;
  
      cur++;
      cur2 = cur;
      while (cur2 < limit && is_alpha(*cur2)) cur2++;
      len = cur2-cur;
      if (len > 0)
      {
        if ( ALLOC( face->type1.font_name, len+1 ) )
        {
          parser->error = error;
          return;
        }
  
        MEM_Copy( face->type1.font_name, cur, len );
        face->type1.font_name[len] = '\0';
      }
      parser->cursor = cur2;
    }
  
    static
    void  parse_font_bbox( T1_Face  face, T1_Loader*  loader )
    {
      T1_Parser*  parser = &loader->parser;
      FT_Short    temp[4];
      FT_BBox*    bbox = &face->type1.font_bbox;
  
      (void)T1_ToCoordArray( parser, 4, temp );
      bbox->xMin = temp[0];
      bbox->yMin = temp[1];
      bbox->xMax = temp[2];
      bbox->yMax = temp[3];
    }
  
    static
    void  parse_font_matrix( T1_Face  face, T1_Loader*  loader )
    {
      T1_Parser*  parser = &loader->parser;
      FT_Matrix*  matrix = &face->type1.font_matrix;
      FT_Fixed    temp[4];
  
      (void)T1_ToFixedArray( parser, 4, temp, 3 );
      matrix->xx = temp[0];
      matrix->yx = temp[1];
      matrix->xy = temp[2];
      matrix->yy = temp[3];
    }
  
  
  
    static
    void  parse_encoding( T1_Face  face, T1_Loader*  loader )
    {
      T1_Parser*  parser = &loader->parser;
      FT_Byte*    cur   = parser->cursor;
      FT_Byte*    limit = parser->limit;
  
      /* skip whitespace */
      while (is_space(*cur))
      {
        cur++;
        if (cur >= limit)
        {
          FT_ERROR(( "type1.parse_encoding: out of bounds !!\n" ));
          parser->error = T1_Err_Invalid_File_Format;
          return;
        }
      }
  
      /* if we have a number, then the encoding is an array, */
      /* and we must load it now                             */
      if ((FT_Byte)(*cur - '0') < 10)
      {
        T1_Encoding*  encode     = &face->type1.encoding;
        FT_Int        count, n;
        T1_Table*     char_table = &loader->encoding_table;
        FT_Memory     memory     = parser->memory;
        FT_Error      error;
  
        /* read the number of entries in the encoding, should be 256 */
        count = T1_ToInt( parser );
        if (parser->error) return;
  
        /* we use a T1_Table to store our charnames */
        encode->num_chars = count;
        if ( ALLOC_ARRAY( encode->char_index, count, FT_Short   ) ||
             ALLOC_ARRAY( encode->char_name,  count, FT_String* ) ||
             (error = T1_New_Table( char_table, count, memory )) != 0     )
        {
          parser->error = error;
          return;
        }
  
        /* now, we will need to read a record of the form         */
        /* ... charcode /charname ... for each entry in our table */
        /*                                                        */
        /* we simply look for a number followed by an immediate   */
        /* name. Note that this ignores correctly the sequence    */
        /* that is often seen in type1 fonts :                    */
        /*                                                        */
        /*   0 1 255 { 1 index exch /.notdef put } for dup        */
        /*                                                        */
        /* used to clean the encoding array before anything else  */
        /*                                                        */
        /* we stop when we encounter a "def"                      */
        /*                                                        */
  
        cur   = parser->cursor;
        limit = parser->limit;
        n     = 0;
  
        for ( ; cur < limit; )
        {
          FT_Byte  c;
  
          c = *cur;
  
          /* we stop when we encounter a 'def' */
          if ( c == 'd' && cur+3 < limit )
          {
            if ( cur[1] == 'e' &&
                 cur[2] == 'f' &&
                 is_space(cur[-1]) &&
                 is_space(cur[3]) )
            {
                FT_TRACE6(( "encoding end\n" ));
                break;
            }
          }
  
          /* otherwise, we must find a number before anything else */
          if ( (FT_Byte)(c-'0') < 10 )
          {
            FT_Int  charcode;
  
            parser->cursor = cur;
            charcode = T1_ToInt(parser);
            cur = parser->cursor;
  
            /* skip whitespace */
            while (cur < limit && is_space(*cur)) cur++;
  
            if (cur < limit && *cur == '/')
            {
              /* bingo, we have an immediate name - it must be a */
              /* character name                                  */
              FT_Byte*  cur2 = cur+1;
              FT_Int    len;
  
              while (cur2 < limit && is_alpha(*cur2)) cur2++;
              len = cur2-cur-1;
              parser->error = T1_Add_Table( char_table, charcode, cur+1, len+1 );
              char_table->elements[charcode][len] = '\0';
              if (parser->error) return;
  
              cur = cur2;
            }
          }
          else
            cur++;
        }
  
        face->type1.encoding_type = t1_encoding_array;
        parser->cursor            = cur;
      }
      /* Otherwise, we should have either "StandardEncoding" or */
      /* "ExpertEncoding"                                       */
      else
      {
        if ( cur+17 < limit &&
             strncmp( (const char*)cur, "StandardEncoding", 16 ) == 0 )
          face->type1.encoding_type = t1_encoding_standard;
  
        else if ( cur+15 < limit &&
                  strncmp( (const char*)cur, "ExpertEncoding", 14 ) == 0 )
          face->type1.encoding_type = t1_encoding_expert;
  
        else
        {
          FT_ERROR(( "type1.parse_encoding: invalid token !!\n" ));
          parser->error = T1_Err_Invalid_File_Format;
        }
      }
    }
  
  
    static
    void  parse_subrs( T1_Face  face, T1_Loader*  loader )
    {
      T1_Parser*  parser = &loader->parser;
      T1_Table*   table  = &loader->subrs;
      FT_Memory   memory = parser->memory;
      FT_Error    error;
      FT_Int      n;
  
      loader->num_subrs = T1_ToInt( parser );
      if (parser->error) return;
  
      /* initialise subrs array */
      error = T1_New_Table( table, loader->num_subrs, memory );
      if (error) goto Fail;
  
      /* the format is simple :                                */
      /*                                                       */
      /*   "index" + binary data                               */
      /*                                                       */
  
      for ( n = 0; n < loader->num_subrs; n++ )
      {
        FT_Int    index, size;
        FT_Byte*  base;
  
        index = T1_ToInt(parser);
        if (!read_binary_data(parser,&size,&base)) return;
  
        /* some fonts use a value of -1 for lenIV to indicate that */
        /* the charstrings are unencoded..                         */
        /*                                                         */
        /* thanks to Tom Kacvinsky for pointing this out..         */
        /*                                                         */
        if (face->type1.private_dict.lenIV >= 0)
        {
          T1_Decrypt( base, size, 4330 );
          size -= face->type1.private_dict.lenIV;
          base += face->type1.private_dict.lenIV;
        }
  
        error = T1_Add_Table( table, index, base, size );
        if (error) goto Fail;
      }
      return;
  
    Fail:
      parser->error = error;
    }
  
  
  
  
    static
    void  parse_charstrings( T1_Face  face, T1_Loader*  loader )
    {
      T1_Parser*  parser     = &loader->parser;
      T1_Table*   code_table = &loader->charstrings;
      T1_Table*   name_table = &loader->glyph_names;
      FT_Memory   memory     = parser->memory;
      FT_Error    error;
  
      FT_Byte*    cur;
      FT_Byte*    limit = parser->limit;
      FT_Int      n;
  
      loader->num_glyphs = T1_ToInt( parser );
      if (parser->error) return;
  
      /* initialise tables */
      error = T1_New_Table( code_table, loader->num_glyphs, memory ) ||
              T1_New_Table( name_table, loader->num_glyphs, memory );
      if (error) goto Fail;
  
      n = 0;
      for ( ;; )
      {
        FT_Int    size;
        FT_Byte*  base;
  
        /* the format is simple :                   */
        /*   "/glyphname" + binary data             */
        /*                                          */
        /* note that we stop when we find a "def"   */
        /*                                          */
        skip_whitespace(parser);
        cur = parser->cursor;
        if (cur >= limit) break;
  
        /* we stop when we find a "def" or "end" keyword */
        if (*cur    == 'd' &&
             cur+3 < limit &&
             cur[1] == 'e' &&
             cur[2] == 'f' )
          break;
  
        if (*cur == 'e'   &&
            cur+3 < limit &&
            cur[1] == 'n' &&
            cur[2] == 'd' )
          break;
  
        if (*cur != '/')
          skip_blackspace(parser);
        else
        {
          FT_Byte*  cur2 = cur+1;
          FT_Int    len;
  
          while (cur2 < limit && is_alpha(*cur2)) cur2++;
          len = cur2-cur-1;
  
          error = T1_Add_Table( name_table, n, cur+1, len+1 );
          if (error) goto Fail;
  
          /* add a trailing zero to the name table */
          name_table->elements[n][len] = '\0';
  
          parser->cursor = cur2;
          if (!read_binary_data(parser,&size,&base)) return;
  
          /* some fonts use a value of -1 for lenIV to indicate that */
          /* the charstrings are unencoded..                         */
          /*                                                         */
          /* thanks to Tom Kacvinsky for pointing this out..         */
          /*                                                         */
          if (face->type1.private_dict.lenIV >= 0)
          {
            T1_Decrypt( base, size, 4330 );
            size -= face->type1.private_dict.lenIV;
            base += face->type1.private_dict.lenIV;
          }
  
          error = T1_Add_Table( code_table, n, base, size );
          if (error) goto Fail;
  
          n++;
          if (n >= loader->num_glyphs)
            break;
        }
      }
      loader->num_glyphs = n;
      return;
  
    Fail:
      parser->error = error;
    }
  
  
  
  
    static
    const T1_KeyWord  t1_keywords[] =
    {
  #include <t1tokens.h>  
      
      /* now add the special functions... */
      T1_KEYWORD_CALLBACK( "FontName", parse_font_name ),
      T1_KEYWORD_CALLBACK( "FontBBox", parse_font_bbox ),
      T1_KEYWORD_CALLBACK( "FontMatrix", parse_font_matrix ),
      T1_KEYWORD_CALLBACK( "Encoding", parse_encoding  ),
      T1_KEYWORD_CALLBACK( "Subrs",    parse_subrs     ),
      T1_KEYWORD_CALLBACK( "CharStrings", parse_charstrings ),
  #ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT
      T1_KEYWORD_CALLBACK( "BlendDesignPositions", parse_blend_design_positions ),
      T1_KEYWORD_CALLBACK( "BlendDesignMap", parse_blend_design_map ),
      T1_KEYWORD_CALLBACK( "BlendAxisTypes", parse_blend_axis_types ),
      T1_KEYWORD_CALLBACK( "WeightVector", parse_weight_vector ),
      T1_KEYWORD_CALLBACK( "shareddict",   parse_shared_dict ),
  #endif    
      T1_KEYWORD_CALLBACK( 0, 0 )
    };
  
  
    static
    FT_Error  parse_dict( T1_Face     face,
                          T1_Loader*  loader,
                          FT_Byte*    base,
                          FT_Long     size )
    {
      T1_Parser*  parser   = &loader->parser;
  
      parser->cursor = base;
      parser->limit  = base + size;
      parser->error  = 0;
  
      {
        FT_Byte*  cur     = base;
        FT_Byte*  limit   = cur + size;
  
        for ( ;cur < limit; cur++ )
        {
          /* look for "FontDirectory", which causes problems on some fonts */
          if ( *cur == 'F' && cur+25 < limit &&
               strncmp( (char*)cur, "FontDirectory", 13 ) == 0 )
          {
            FT_Byte*  cur2;
            
            /* skip the "FontDirectory" keyword */
            cur += 13;
            cur2 = cur;
            
            /* lookup the 'known' keyword */
            while (cur < limit && *cur != 'k' && strncmp( (char*)cur, "known", 5 ) )
              cur++;
            
            if (cur < limit)
            {
              T1_Token_Rec  token;
              
              /* skip the "known" keyword and the token following it */
              cur += 5;
              loader->parser.cursor = cur;
              T1_ToToken( &loader->parser, &token );
              
              /* if the last token was an array, skip it !! */
              if (token.type == t1_token_array)
                cur2 = parser->cursor;
            }
            cur = cur2;
          }
          /* look for immediates */
          else if (*cur == '/' && cur+2 < limit)
          {
            FT_Byte* cur2;
            FT_Int   len;
  
            cur  ++;
            cur2 = cur;
            while (cur2 < limit && is_alpha(*cur2)) cur2++;
            len  = cur2-cur;
  
            if (len > 0 && len < 22)
            {
              if (!loader->fontdata)
              {
                if ( strncmp( (char*)cur, "FontInfo", 8 ) == 0 )
                  loader->fontdata = 1;
              }
              else
              {
                /* now, compare the immediate name to the keyword table */
                T1_KeyWord*  keyword = (T1_KeyWord*)t1_keywords;
    
                for (;;)
                {
                  FT_Byte*  name;
    
                  name = (FT_Byte*)keyword->name;
                  if (!name) break;
    
                  if ( cur[0] == name[0] &&
                       len == (FT_Int)strlen((const char*)name) )
                  {
                    FT_Int  n;
                    for ( n = 1; n < len; n++ )
                      if (cur[n] != name[n])
                        break;
    
                    if (n >= len)
                    {
                      /* we found it - run the parsing callback !! */
                      parser->cursor = cur2;
                      skip_whitespace( parser );
                      parser->error = t1_load_keyword( face, loader, keyword );
                      if (parser->error)
                        return parser->error;
    
                      cur = parser->cursor;
                      break;
                    }
                  }
                  keyword++;
                }
              }
            }
          }
        }
      }
      return parser->error;
    }
  
    static
    void t1_init_loader( T1_Loader* loader, T1_Face  face )
    {
      UNUSED(face);
  
      MEM_Set( loader, 0, sizeof(*loader) );
      loader->num_glyphs = 0;
      loader->num_chars  = 0;
  
      /* initialize the tables - simply set their 'init' field to 0 */
      loader->encoding_table.init = 0;
      loader->charstrings.init    = 0;
      loader->glyph_names.init    = 0;
      loader->subrs.init          = 0;
      loader->fontdata            = 0;
    }
  
    static
    void t1_done_loader( T1_Loader* loader )
    {
      T1_Parser*  parser = &loader->parser;
  
      /* finalize tables */
      T1_Release_Table( &loader->encoding_table );
      T1_Release_Table( &loader->charstrings );
      T1_Release_Table( &loader->glyph_names );
      T1_Release_Table( &loader->subrs );
  
      /* finalize parser */
      T1_Done_Parser( parser );
    }
  
    LOCAL_FUNC
    FT_Error  T1_Open_Face( T1_Face  face )
    {
      T1_Loader  loader;
      T1_Parser* parser;
      T1_Font*   type1 = &face->type1;
      FT_Error   error;
  
      t1_init_loader( &loader, face );
  
      /* default lenIV */
      type1->private_dict.lenIV = 4;
  
      parser = &loader.parser;
      error = T1_New_Parser( parser, face->root.stream, face->root.memory );
      if (error) goto Exit;
  
      error = parse_dict( face, &loader, parser->base_dict, parser->base_len );
      if (error) goto Exit;
  
      error = T1_Get_Private_Dict( parser );
      if (error) goto Exit;
  
      error = parse_dict( face, &loader, parser->private_dict, parser->private_len );
      if (error) goto Exit;
  
      /* now, propagate the subrs, charstrings and glyphnames tables */
      /* to the Type1 data                                           */
      type1->num_glyphs = loader.num_glyphs;
  
      if ( !loader.subrs.init )
      {
        FT_ERROR(( "T1.Open_Face: no subrs array in face !!\n" ));
        error = T1_Err_Invalid_File_Format;
      }
  
      if ( !loader.charstrings.init )
      {
        FT_ERROR(( "T1.Open_Face: no charstrings array in face !!\n" ));
        error = T1_Err_Invalid_File_Format;
      }
  
      loader.subrs.init  = 0;
      type1->num_subrs   = loader.num_subrs;
      type1->subrs_block = loader.subrs.block;
      type1->subrs       = loader.subrs.elements;
      type1->subrs_len   = loader.subrs.lengths;
  
      loader.charstrings.init  = 0;
      type1->charstrings_block = loader.charstrings.block;
      type1->charstrings       = loader.charstrings.elements;
      type1->charstrings_len   = loader.charstrings.lengths;
  
      /* we copy the glyph names "block" and "elements" fields */
      /* but the "lengths" field must be released later..      */
      type1->glyph_names_block    = loader.glyph_names.block;
      type1->glyph_names          = (FT_String**)loader.glyph_names.elements;
      loader.glyph_names.block    = 0;
      loader.glyph_names.elements = 0;
  
      /* we must now build type1.encoding when we have a custom */
      /* array..                                                */
      if ( type1->encoding_type == t1_encoding_array )
      {
        FT_Int    charcode, index, min_char, max_char;
        FT_Byte*  char_name;
        FT_Byte*  glyph_name;
  
        /* OK, we do the following : for each element in the encoding */
        /* table, lookup the index of the glyph having the same name  */
        /* the index is then stored in type1.encoding.char_index, and */
        /* a the name to type1.encoding.char_name                     */
  
        min_char = +32000;
        max_char = -32000;
  
        charcode = 0;
        for ( ; charcode < loader.encoding_table.num_elems; charcode++ )
        {
          type1->encoding.char_index[charcode] = 0;
          type1->encoding.char_name [charcode] = ".notdef";
  
          char_name = loader.encoding_table.elements[charcode];
          if (char_name)
            for ( index = 0; index < type1->num_glyphs; index++ )
            {
              glyph_name = (FT_Byte*)type1->glyph_names[index];
              if ( strcmp( (const char*)char_name,
                           (const char*)glyph_name ) == 0 )
              {
                type1->encoding.char_index[charcode] = index;
                type1->encoding.char_name [charcode] = (char*)glyph_name;
  
                if (charcode < min_char) min_char = charcode;
                if (charcode > max_char) max_char = charcode;
                break;
              }
            }
        }
        type1->encoding.code_first = min_char;
        type1->encoding.code_last  = max_char;
        type1->encoding.num_chars  = loader.num_chars;
     }
  
    Exit:
      t1_done_loader( &loader );
      return error;
    }
  

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