/***************************************************************************/

/*                                                                         */

/*  t42objs.c                                                              */

/*                                                                         */

/*    Type 42 objects manager (body).                                      */

/*                                                                         */

/*  Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009               */

/*  by Roberto Alameda.                                                    */

/*                                                                         */

/*  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 "t42objs.h"

#include "t42parse.h"

#include "t42error.h"

#include FT_INTERNAL_DEBUG_H

#include FT_LIST_H

#include FT_TRUETYPE_IDS_H 

#undef  FT_COMPONENT

#define FT_COMPONENT  trace_t42

  static FT_Error

  T42_Open_Face( T42_Face  face )

  {

    T42_LoaderRec  loader;

    T42_Parser     parser;

    T1_Font        type1 = &face->type1;

    FT_Memory      memory = face->root.memory;

    FT_Error       error;

    PSAux_Service  psaux  = (PSAux_Service)face->psaux;

    t42_loader_init( &loader, face );

    parser = &loader.parser;

    if ( FT_ALLOC( face->ttf_data, 12 ) )

      goto Exit;

    error = t42_parser_init( parser,

                             face->root.stream,

                             memory,

                             psaux);

    if ( error )

      goto Exit;

    error = t42_parse_dict( face, &loader,

                            parser->base_dict, parser->base_len );

    if ( error )

      goto Exit;

    if ( type1->font_type != 42 )

    {

      error = T42_Err_Unknown_File_Format;

      goto Exit;

    }

    /* now, propagate the charstrings and glyphnames tables */

    /* to the Type1 data                                    */

    type1->num_glyphs = loader.num_glyphs;

    if ( !loader.charstrings.init )

    {

      FT_ERROR(( "T42_Open_Face: no charstrings array in face\n" ));

      error = T42_Err_Invalid_File_Format;

    }

    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; */

    /* 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_TYPE_ARRAY )

    {

      FT_Int    charcode, idx, min_char, max_char;

      FT_Byte*  char_name;

      FT_Byte*  glyph_name;

      /* OK, we do the following: for each element in the encoding   */

      /* table, look up the index of the glyph having the same name  */

      /* as defined in the CharStrings array.                        */

      /* The index is then stored in type1.encoding.char_index, and  */

      /* the name in type1.encoding.char_name                        */

      min_char = 0;

      max_char = 0;

      charcode = 0;

      for ( ; charcode < loader.encoding_table.max_elems; charcode++ )

      {

        type1->encoding.char_index[charcode] = 0;

        type1->encoding.char_name [charcode] = (char *)".notdef";

        char_name = loader.encoding_table.elements[charcode];

        if ( char_name )

          for ( idx = 0; idx < type1->num_glyphs; idx++ )

          {

            glyph_name = (FT_Byte*)type1->glyph_names[idx];

            if ( ft_strcmp( (const char*)char_name,

                            (const char*)glyph_name ) == 0 )

            {

              type1->encoding.char_index[charcode] = (FT_UShort)idx;

              type1->encoding.char_name [charcode] = (char*)glyph_name;

              /* Change min/max encoded char only if glyph name is */

              /* not /.notdef                                      */

              if ( ft_strcmp( (const char*)".notdef",

                              (const char*)glyph_name ) != 0 )

              {

                if ( charcode < min_char )

                  min_char = charcode;

                if ( charcode >= max_char )

                  max_char = charcode + 1;

              }

              break;

            }

          }

      }

      type1->encoding.code_first = min_char;

      type1->encoding.code_last  = max_char;

      type1->encoding.num_chars  = loader.num_chars;

    }

  Exit:

    t42_loader_done( &loader );

    return error;

  }

  /***************** Driver Functions *************/

  FT_LOCAL_DEF( FT_Error )

  T42_Face_Init( FT_Stream      stream,

                 T42_Face       face,

                 FT_Int         face_index,

                 FT_Int         num_params,

                 FT_Parameter*  params )

  {

    FT_Error            error;

    FT_Service_PsCMaps  psnames;

    PSAux_Service       psaux;

    FT_Face             root  = (FT_Face)&face->root;

    T1_Font             type1 = &face->type1;

    PS_FontInfo         info  = &type1->font_info;

    FT_UNUSED( num_params );

    FT_UNUSED( params );

    FT_UNUSED( face_index );

    FT_UNUSED( stream );

    face->ttf_face       = NULL;

    face->root.num_faces = 1;

    FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS );

    face->psnames = psnames;

    face->psaux = FT_Get_Module_Interface( FT_FACE_LIBRARY( face ),

                                           "psaux" );

    psaux = (PSAux_Service)face->psaux;

    /* open the tokenizer, this will also check the font format */

    error = T42_Open_Face( face );

    if ( error )

      goto Exit;

    /* if we just wanted to check the format, leave successfully now */

    if ( face_index < 0 )

      goto Exit;

    /* check the face index */

    if ( face_index > 0 )

    {

      FT_ERROR(( "T42_Face_Init: invalid face index\n" ));

      error = T42_Err_Invalid_Argument;

      goto Exit;

    }

    /* Now load the font program into the face object */

    /* Init the face object fields */

    /* Now set up root face fields */

    root->num_glyphs   = type1->num_glyphs;

    root->num_charmaps = 0;

    root->face_index   = 0;

    root->face_flags = FT_FACE_FLAG_SCALABLE    |

                       FT_FACE_FLAG_HORIZONTAL  |

                       FT_FACE_FLAG_GLYPH_NAMES;

    if ( info->is_fixed_pitch )

      root->face_flags |= FT_FACE_FLAG_FIXED_WIDTH;

    /* We only set this flag if we have the patented bytecode interpreter. */

    /* There are no known `tricky' Type42 fonts that could be loaded with  */

    /* the unpatented interpreter.                                         */

#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER

    root->face_flags |= FT_FACE_FLAG_HINTER;

#endif

    /* XXX: TODO -- add kerning with .afm support */

    /* get style name -- be careful, some broken fonts only */

    /* have a `/FontName' dictionary entry!                 */

    root->family_name = info->family_name;

    /* assume "Regular" style if we don't know better */

    root->style_name = (char *)"Regular";

    if ( root->family_name )

    {

      char*  full   = info->full_name;

      char*  family = root->family_name;

      if ( full )

      {

        while ( *full )

        {

          if ( *full == *family )

          {

            family++;

            full++;

          }

          else

          {

            if ( *full == ' ' || *full == '-' )

              full++;

            else if ( *family == ' ' || *family == '-' )

              family++;

            else

            {

              if ( !*family )

                root->style_name = full;

              break;

            }

          }

        }

      }

    }

    else

    {

      /* do we have a `/FontName'? */

      if ( type1->font_name )

        root->family_name = type1->font_name;

    }

    /* no embedded bitmap support */

    root->num_fixed_sizes = 0;

    root->available_sizes = 0;

    /* Load the TTF font embedded in the T42 font */

    {

      FT_Open_Args  args;

      args.flags       = FT_OPEN_MEMORY;

      args.memory_base = face->ttf_data;

      args.memory_size = face->ttf_size;

      if ( num_params )

      {

        args.flags     |= FT_OPEN_PARAMS;

        args.num_params = num_params;

        args.params     = params;

      }

      error = FT_Open_Face( FT_FACE_LIBRARY( face ),

                            &args, 0, &face->ttf_face );

    }

    if ( error )

      goto Exit;

    FT_Done_Size( face->ttf_face->size );

    /* Ignore info in FontInfo dictionary and use the info from the  */

    /* loaded TTF font.  The PostScript interpreter also ignores it. */

    root->bbox         = face->ttf_face->bbox;

    root->units_per_EM = face->ttf_face->units_per_EM;

    root->ascender  = face->ttf_face->ascender;

    root->descender = face->ttf_face->descender;

    root->height    = face->ttf_face->height;

    root->max_advance_width  = face->ttf_face->max_advance_width;

    root->max_advance_height = face->ttf_face->max_advance_height;

    root->underline_position  = (FT_Short)info->underline_position;

    root->underline_thickness = (FT_Short)info->underline_thickness;

    /* compute style flags */

    root->style_flags = 0;

    if ( info->italic_angle )

      root->style_flags |= FT_STYLE_FLAG_ITALIC;

    if ( face->ttf_face->style_flags & FT_STYLE_FLAG_BOLD )

      root->style_flags |= FT_STYLE_FLAG_BOLD;

    if ( face->ttf_face->face_flags & FT_FACE_FLAG_VERTICAL )

      root->face_flags |= FT_FACE_FLAG_VERTICAL;

    {

      if ( psnames && psaux )

      {

        FT_CharMapRec    charmap;

        T1_CMap_Classes  cmap_classes = psaux->t1_cmap_classes;

        FT_CMap_Class    clazz;

        charmap.face = root;

        /* first of all, try to synthesize a Unicode charmap */

        charmap.platform_id = TT_PLATFORM_MICROSOFT;

        charmap.encoding_id = TT_MS_ID_UNICODE_CS;

        charmap.encoding    = FT_ENCODING_UNICODE;

        error = FT_CMap_New( cmap_classes->unicode, NULL, &charmap, NULL );

        if ( error && FT_Err_No_Unicode_Glyph_Name != error )

          goto Exit;

        error = FT_Err_Ok;

        /* now, generate an Adobe Standard encoding when appropriate */

        charmap.platform_id = TT_PLATFORM_ADOBE;

        clazz               = NULL;

        switch ( type1->encoding_type )

        {

        case T1_ENCODING_TYPE_STANDARD:

          charmap.encoding    = FT_ENCODING_ADOBE_STANDARD;

          charmap.encoding_id = TT_ADOBE_ID_STANDARD;

          clazz               = cmap_classes->standard;

          break;

        case T1_ENCODING_TYPE_EXPERT:

          charmap.encoding    = FT_ENCODING_ADOBE_EXPERT;

          charmap.encoding_id = TT_ADOBE_ID_EXPERT;

          clazz               = cmap_classes->expert;

          break;

        case T1_ENCODING_TYPE_ARRAY:

          charmap.encoding    = FT_ENCODING_ADOBE_CUSTOM;

          charmap.encoding_id = TT_ADOBE_ID_CUSTOM;

          clazz               = cmap_classes->custom;

          break;

        case T1_ENCODING_TYPE_ISOLATIN1:

          charmap.encoding    = FT_ENCODING_ADOBE_LATIN_1;

          charmap.encoding_id = TT_ADOBE_ID_LATIN_1;

          clazz               = cmap_classes->unicode;

          break;

        default:

          ;

        }

        if ( clazz )

          error = FT_CMap_New( clazz, NULL, &charmap, NULL );

#if 0

        /* Select default charmap */

        if ( root->num_charmaps )

          root->charmap = root->charmaps[0];

#endif

      }

    }

  Exit:

    return error;

  }

  FT_LOCAL_DEF( void )

  T42_Face_Done( T42_Face  face )

  {

    T1_Font      type1;

    PS_FontInfo  info;

    FT_Memory    memory;

    if ( !face )

      return;

    type1  = &face->type1;

    info   = &type1->font_info;

    memory = face->root.memory;

    /* delete internal ttf face prior to freeing face->ttf_data */

    if ( face->ttf_face )

      FT_Done_Face( face->ttf_face );

    /* release font info strings */

    FT_FREE( info->version );

    FT_FREE( info->notice );

    FT_FREE( info->full_name );

    FT_FREE( info->family_name );

    FT_FREE( info->weight );

    /* release top dictionary */

    FT_FREE( type1->charstrings_len );

    FT_FREE( type1->charstrings );

    FT_FREE( type1->glyph_names );

    FT_FREE( type1->charstrings_block );

    FT_FREE( type1->glyph_names_block );

    FT_FREE( type1->encoding.char_index );

    FT_FREE( type1->encoding.char_name );

    FT_FREE( type1->font_name );

    FT_FREE( face->ttf_data );

#if 0

    /* release afm data if present */

    if ( face->afm_data )

      T1_Done_AFM( memory, (T1_AFM*)face->afm_data );

#endif

    /* release unicode map, if any */

    FT_FREE( face->unicode_map.maps );

    face->unicode_map.num_maps = 0;

    face->root.family_name = 0;

    face->root.style_name  = 0;

  }

  /*************************************************************************/

  /*                                                                       */

  /* <Function>                                                            */

  /*    T42_Driver_Init                                                    */

  /*                                                                       */

  /* <Description>                                                         */

  /*    Initializes a given Type 42 driver object.                         */

  /*                                                                       */

  /* <Input>                                                               */

  /*    driver :: A handle to the target driver object.                    */

  /*                                                                       */

  /* <Return>                                                              */

  /*    FreeType error code.  0 means success.                             */

  /*                                                                       */

  FT_LOCAL_DEF( FT_Error )

  T42_Driver_Init( T42_Driver  driver )

  {

    FT_Module  ttmodule;

    ttmodule = FT_Get_Module( FT_MODULE(driver)->library, "truetype" );

    driver->ttclazz = (FT_Driver_Class)ttmodule->clazz;

    return T42_Err_Ok;

  }

  FT_LOCAL_DEF( void )

  T42_Driver_Done( T42_Driver  driver )

  {

    FT_UNUSED( driver );

  }

  FT_LOCAL_DEF( FT_Error )

  T42_Size_Init( T42_Size  size )

  {

    FT_Face   face = size->root.face;

    T42_Face  t42face = (T42_Face)face;

    FT_Size   ttsize;

    FT_Error  error   = T42_Err_Ok;

    error = FT_New_Size( t42face->ttf_face, &ttsize );

    size->ttsize = ttsize;

    FT_Activate_Size( ttsize );

    return error;

  }

  FT_LOCAL_DEF( FT_Error )

  T42_Size_Request( T42_Size         size,

                    FT_Size_Request  req )

  {

    T42_Face  face = (T42_Face)size->root.face;

    FT_Error  error;

    FT_Activate_Size( size->ttsize );

    error = FT_Request_Size( face->ttf_face, req );

    if ( !error )

      ( (FT_Size)size )->metrics = face->ttf_face->size->metrics;

    return error;

  }

  FT_LOCAL_DEF( FT_Error )

  T42_Size_Select( T42_Size  size,

                   FT_ULong  strike_index )

  {

    T42_Face  face = (T42_Face)size->root.face;

    FT_Error  error;

    FT_Activate_Size( size->ttsize );

    error = FT_Select_Size( face->ttf_face, (FT_Int)strike_index );

    if ( !error )

      ( (FT_Size)size )->metrics = face->ttf_face->size->metrics;