misc/libfreetype/src/cid/cidload.c
changeset 9372 915436ff64ab
parent 9371 f3840de881bd
child 9373 b769a8e38cbd
--- a/misc/libfreetype/src/cid/cidload.c	Thu Jul 25 23:16:06 2013 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,672 +0,0 @@
-/***************************************************************************/
-/*                                                                         */
-/*  cidload.c                                                              */
-/*                                                                         */
-/*    CID-keyed Type1 font loader (body).                                  */
-/*                                                                         */
-/*  Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2009 by             */
-/*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
-/*                                                                         */
-/*  This file is part of the FreeType project, and may only be used,       */
-/*  modified, and distributed under the terms of the FreeType project      */
-/*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
-/*  this file you indicate that you have read the license and              */
-/*  understand and accept it fully.                                        */
-/*                                                                         */
-/***************************************************************************/
-
-
-#include <ft2build.h>
-#include FT_INTERNAL_DEBUG_H
-#include FT_CONFIG_CONFIG_H
-#include FT_MULTIPLE_MASTERS_H
-#include FT_INTERNAL_TYPE1_TYPES_H
-
-#include "cidload.h"
-
-#include "ciderrs.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_cidload
-
-
-  /* read a single offset */
-  FT_LOCAL_DEF( FT_Long )
-  cid_get_offset( FT_Byte*  *start,
-                  FT_Byte    offsize )
-  {
-    FT_Long   result;
-    FT_Byte*  p = *start;
-
-
-    for ( result = 0; offsize > 0; offsize-- )
-    {
-      result <<= 8;
-      result  |= *p++;
-    }
-
-    *start = p;
-    return result;
-  }
-
-
-  /*************************************************************************/
-  /*************************************************************************/
-  /*****                                                               *****/
-  /*****                    TYPE 1 SYMBOL PARSING                      *****/
-  /*****                                                               *****/
-  /*************************************************************************/
-  /*************************************************************************/
-
-
-  static FT_Error
-  cid_load_keyword( CID_Face        face,
-                    CID_Loader*     loader,
-                    const T1_Field  keyword )
-  {
-    FT_Error      error;
-    CID_Parser*   parser = &loader->parser;
-    FT_Byte*      object;
-    void*         dummy_object;
-    CID_FaceInfo  cid = &face->cid;
-
-
-    /* if the keyword has a dedicated callback, call it */
-    if ( keyword->type == T1_FIELD_TYPE_CALLBACK )
-    {
-      keyword->reader( (FT_Face)face, parser );
-      error = parser->root.error;
-      goto Exit;
-    }
-
-    /* we must now compute the address of our target object */
-    switch ( keyword->location )
-    {
-    case T1_FIELD_LOCATION_CID_INFO:
-      object = (FT_Byte*)cid;
-      break;
-
-    case T1_FIELD_LOCATION_FONT_INFO:
-      object = (FT_Byte*)&cid->font_info;
-      break;
-
-    case T1_FIELD_LOCATION_FONT_EXTRA:
-      object = (FT_Byte*)&face->font_extra;
-      break;
-
-    case T1_FIELD_LOCATION_BBOX:
-      object = (FT_Byte*)&cid->font_bbox;
-      break;
-
-    default:
-      {
-        CID_FaceDict  dict;
-
-
-        if ( parser->num_dict < 0 )
-        {
-          FT_ERROR(( "cid_load_keyword: invalid use of `%s'\n",
-                     keyword->ident ));
-          error = CID_Err_Syntax_Error;
-          goto Exit;
-        }
-
-        dict = cid->font_dicts + parser->num_dict;
-        switch ( keyword->location )
-        {
-        case T1_FIELD_LOCATION_PRIVATE:
-          object = (FT_Byte*)&dict->private_dict;
-          break;
-
-        default:
-          object = (FT_Byte*)dict;
-        }
-      }
-    }
-
-    dummy_object = object;
-
-    /* now, load the keyword data in the object's field(s) */
-    if ( keyword->type == T1_FIELD_TYPE_INTEGER_ARRAY ||
-         keyword->type == T1_FIELD_TYPE_FIXED_ARRAY   )
-      error = cid_parser_load_field_table( &loader->parser, keyword,
-                                           &dummy_object );
-    else
-      error = cid_parser_load_field( &loader->parser,
-                                     keyword, &dummy_object );
-  Exit:
-    return error;
-  }
-
-
-  FT_CALLBACK_DEF( FT_Error )
-  parse_font_matrix( CID_Face     face,
-                     CID_Parser*  parser )
-  {
-    FT_Matrix*    matrix;
-    FT_Vector*    offset;
-    CID_FaceDict  dict;
-    FT_Face       root = (FT_Face)&face->root;
-    FT_Fixed      temp[6];
-    FT_Fixed      temp_scale;
-
-
-    if ( parser->num_dict >= 0 )
-    {
-      dict   = face->cid.font_dicts + parser->num_dict;
-      matrix = &dict->font_matrix;
-      offset = &dict->font_offset;
-
-      (void)cid_parser_to_fixed_array( parser, 6, temp, 3 );
-
-      temp_scale = FT_ABS( temp[3] );
-
-      /* Set units per EM based on FontMatrix values.  We set the value to */
-      /* `1000/temp_scale', because temp_scale was already multiplied by   */
-      /* 1000 (in `t1_tofixed', from psobjs.c).                            */
-      root->units_per_EM = (FT_UShort)( FT_DivFix( 0x10000L,
-                                        FT_DivFix( temp_scale, 1000 ) ) );
-
-      /* we need to scale the values by 1.0/temp[3] */
-      if ( temp_scale != 0x10000L )
-      {
-        temp[0] = FT_DivFix( temp[0], temp_scale );
-        temp[1] = FT_DivFix( temp[1], temp_scale );
-        temp[2] = FT_DivFix( temp[2], temp_scale );
-        temp[4] = FT_DivFix( temp[4], temp_scale );
-        temp[5] = FT_DivFix( temp[5], temp_scale );
-        temp[3] = 0x10000L;
-      }
-
-      matrix->xx = temp[0];
-      matrix->yx = temp[1];
-      matrix->xy = temp[2];
-      matrix->yy = temp[3];
-
-      /* note that the font offsets are expressed in integer font units */
-      offset->x  = temp[4] >> 16;
-      offset->y  = temp[5] >> 16;
-    }
-
-    return CID_Err_Ok;      /* this is a callback function; */
-                            /* we must return an error code */
-  }
-
-
-  FT_CALLBACK_DEF( FT_Error )
-  parse_fd_array( CID_Face     face,
-                  CID_Parser*  parser )
-  {
-    CID_FaceInfo  cid    = &face->cid;
-    FT_Memory     memory = face->root.memory;
-    FT_Error      error  = CID_Err_Ok;
-    FT_Long       num_dicts;
-
-
-    num_dicts = cid_parser_to_int( parser );
-
-    if ( !cid->font_dicts )
-    {
-      FT_Int  n;
-
-
-      if ( FT_NEW_ARRAY( cid->font_dicts, num_dicts ) )
-        goto Exit;
-
-      cid->num_dicts = (FT_UInt)num_dicts;
-
-      /* don't forget to set a few defaults */
-      for ( n = 0; n < cid->num_dicts; n++ )
-      {
-        CID_FaceDict  dict = cid->font_dicts + n;
-
-
-        /* default value for lenIV */
-        dict->private_dict.lenIV = 4;
-      }
-    }
-
-  Exit:
-    return error;
-  }
-
-
-  /* by mistake, `expansion_factor' appears both in PS_PrivateRec */
-  /* and CID_FaceDictRec (both are public header files and can't  */
-  /* changed); we simply copy the value                           */
-
-  FT_CALLBACK_DEF( FT_Error )
-  parse_expansion_factor( CID_Face     face,
-                          CID_Parser*  parser )
-  {
-    CID_FaceDict  dict;
-
-
-    if ( parser->num_dict >= 0 )
-    {
-      dict = face->cid.font_dicts + parser->num_dict;
-
-      dict->expansion_factor              = cid_parser_to_fixed( parser, 0 );
-      dict->private_dict.expansion_factor = dict->expansion_factor;
-    }
-
-    return CID_Err_Ok;
-  }
-
-
-  static
-  const T1_FieldRec  cid_field_records[] =
-  {
-
-#include "cidtoken.h"
-
-    T1_FIELD_CALLBACK( "FDArray",         parse_fd_array, 0 )
-    T1_FIELD_CALLBACK( "FontMatrix",      parse_font_matrix, 0 )
-    T1_FIELD_CALLBACK( "ExpansionFactor", parse_expansion_factor, 0 )
-
-    { 0, T1_FIELD_LOCATION_CID_INFO, T1_FIELD_TYPE_NONE, 0, 0, 0, 0, 0, 0 }
-  };
-
-
-  static FT_Error
-  cid_parse_dict( CID_Face     face,
-                  CID_Loader*  loader,
-                  FT_Byte*     base,
-                  FT_Long      size )
-  {
-    CID_Parser*  parser = &loader->parser;
-
-
-    parser->root.cursor = base;
-    parser->root.limit  = base + size;
-    parser->root.error  = CID_Err_Ok;
-
-    {
-      FT_Byte*  cur   = base;
-      FT_Byte*  limit = cur + size;
-
-
-      for (;;)
-      {
-        FT_Byte*  newlimit;
-
-
-        parser->root.cursor = cur;
-        cid_parser_skip_spaces( parser );
-
-        if ( parser->root.cursor >= limit )
-          newlimit = limit - 1 - 17;
-        else
-          newlimit = parser->root.cursor - 17;
-
-        /* look for `%ADOBeginFontDict' */
-        for ( ; cur < newlimit; cur++ )
-        {
-          if ( *cur == '%'                                            &&
-               ft_strncmp( (char*)cur, "%ADOBeginFontDict", 17 ) == 0 )
-          {
-            /* if /FDArray was found, then cid->num_dicts is > 0, and */
-            /* we can start increasing parser->num_dict               */
-            if ( face->cid.num_dicts > 0 )
-              parser->num_dict++;
-          }
-        }
-
-        cur = parser->root.cursor;
-        /* no error can occur in cid_parser_skip_spaces */
-        if ( cur >= limit )
-          break;
-
-        cid_parser_skip_PS_token( parser );
-        if ( parser->root.cursor >= limit || parser->root.error )
-          break;
-
-        /* look for immediates */
-        if ( *cur == '/' && cur + 2 < limit )
-        {
-          FT_PtrDist  len;
-
-
-          cur++;
-          len = parser->root.cursor - cur;
-
-          if ( len > 0 && len < 22 )
-          {
-            /* now compare the immediate name to the keyword table */
-            T1_Field  keyword = (T1_Field)cid_field_records;
-
-
-            for (;;)
-            {
-              FT_Byte*  name;
-
-
-              name = (FT_Byte*)keyword->ident;
-              if ( !name )
-                break;
-
-              if ( cur[0] == name[0]                                 &&
-                   len == (FT_PtrDist)ft_strlen( (const char*)name ) )
-              {
-                FT_PtrDist  n;
-
-
-                for ( n = 1; n < len; n++ )
-                  if ( cur[n] != name[n] )
-                    break;
-
-                if ( n >= len )
-                {
-                  /* we found it - run the parsing callback */
-                  parser->root.error = cid_load_keyword( face,
-                                                         loader,
-                                                         keyword );
-                  if ( parser->root.error )
-                    return parser->root.error;
-                  break;
-                }
-              }
-              keyword++;
-            }
-          }
-        }
-
-        cur = parser->root.cursor;
-      }
-    }
-    return parser->root.error;
-  }
-
-
-  /* read the subrmap and the subrs of each font dict */
-  static FT_Error
-  cid_read_subrs( CID_Face  face )
-  {
-    CID_FaceInfo   cid    = &face->cid;
-    FT_Memory      memory = face->root.memory;
-    FT_Stream      stream = face->cid_stream;
-    FT_Error       error;
-    FT_Int         n;
-    CID_Subrs      subr;
-    FT_UInt        max_offsets = 0;
-    FT_ULong*      offsets = 0;
-    PSAux_Service  psaux = (PSAux_Service)face->psaux;
-
-
-    if ( FT_NEW_ARRAY( face->subrs, cid->num_dicts ) )
-      goto Exit;
-
-    subr = face->subrs;
-    for ( n = 0; n < cid->num_dicts; n++, subr++ )
-    {
-      CID_FaceDict  dict  = cid->font_dicts + n;
-      FT_Int        lenIV = dict->private_dict.lenIV;
-      FT_UInt       count, num_subrs = dict->num_subrs;
-      FT_ULong      data_len;
-      FT_Byte*      p;
-
-
-      /* reallocate offsets array if needed */
-      if ( num_subrs + 1 > max_offsets )
-      {
-        FT_UInt  new_max = FT_PAD_CEIL( num_subrs + 1, 4 );
-
-
-        if ( FT_RENEW_ARRAY( offsets, max_offsets, new_max ) )
-          goto Fail;
-
-        max_offsets = new_max;
-      }
-
-      /* read the subrmap's offsets */
-      if ( FT_STREAM_SEEK( cid->data_offset + dict->subrmap_offset ) ||
-           FT_FRAME_ENTER( ( num_subrs + 1 ) * dict->sd_bytes )      )
-        goto Fail;
-
-      p = (FT_Byte*)stream->cursor;
-      for ( count = 0; count <= num_subrs; count++ )
-        offsets[count] = cid_get_offset( &p, (FT_Byte)dict->sd_bytes );
-
-      FT_FRAME_EXIT();
-
-      /* now, compute the size of subrs charstrings, */
-      /* allocate, and read them                     */
-      data_len = offsets[num_subrs] - offsets[0];
-
-      if ( FT_NEW_ARRAY( subr->code, num_subrs + 1 ) ||
-               FT_ALLOC( subr->code[0], data_len )   )
-        goto Fail;
-
-      if ( FT_STREAM_SEEK( cid->data_offset + offsets[0] ) ||
-           FT_STREAM_READ( subr->code[0], data_len )  )
-        goto Fail;
-
-      /* set up pointers */
-      for ( count = 1; count <= num_subrs; count++ )
-      {
-        FT_ULong  len;
-
-
-        len               = offsets[count] - offsets[count - 1];
-        subr->code[count] = subr->code[count - 1] + len;
-      }
-
-      /* decrypt subroutines, but only if lenIV >= 0 */
-      if ( lenIV >= 0 )
-      {
-        for ( count = 0; count < num_subrs; count++ )
-        {
-          FT_ULong  len;
-
-
-          len = offsets[count + 1] - offsets[count];
-          psaux->t1_decrypt( subr->code[count], len, 4330 );
-        }
-      }
-
-      subr->num_subrs = num_subrs;
-    }
-
-  Exit:
-    FT_FREE( offsets );
-    return error;
-
-  Fail:
-    if ( face->subrs )
-    {
-      for ( n = 0; n < cid->num_dicts; n++ )
-      {
-        if ( face->subrs[n].code )
-          FT_FREE( face->subrs[n].code[0] );
-
-        FT_FREE( face->subrs[n].code );
-      }
-      FT_FREE( face->subrs );
-    }
-    goto Exit;
-  }
-
-
-  static void
-  t1_init_loader( CID_Loader*  loader,
-                  CID_Face     face )
-  {
-    FT_UNUSED( face );
-
-    FT_MEM_ZERO( loader, sizeof ( *loader ) );
-  }
-
-
-  static void
-  t1_done_loader( CID_Loader*  loader )
-  {
-    CID_Parser*  parser = &loader->parser;
-
-
-    /* finalize parser */
-    cid_parser_done( parser );
-  }
-
-
-  static FT_Error
-  cid_hex_to_binary( FT_Byte*  data,
-                     FT_Long   data_len,
-                     FT_ULong  offset,
-                     CID_Face  face )
-  {
-    FT_Stream  stream = face->root.stream;
-    FT_Error   error;
-
-    FT_Byte    buffer[256];
-    FT_Byte   *p, *plimit;
-    FT_Byte   *d, *dlimit;
-    FT_Byte    val;
-
-    FT_Bool    upper_nibble, done;
-
-
-    if ( FT_STREAM_SEEK( offset ) )
-      goto Exit;
-
-    d      = data;
-    dlimit = d + data_len;
-    p      = buffer;
-    plimit = p;
-
-    upper_nibble = 1;
-    done         = 0;
-
-    while ( d < dlimit )
-    {
-      if ( p >= plimit )
-      {
-        FT_ULong  oldpos = FT_STREAM_POS();
-        FT_ULong  size   = stream->size - oldpos;
-
-
-        if ( size == 0 )
-        {
-          error = CID_Err_Syntax_Error;
-          goto Exit;
-        }
-
-        if ( FT_STREAM_READ( buffer, 256 > size ? size : 256 ) )
-          goto Exit;
-        p      = buffer;
-        plimit = p + FT_STREAM_POS() - oldpos;
-      }
-
-      if ( ft_isdigit( *p ) )
-        val = (FT_Byte)( *p - '0' );
-      else if ( *p >= 'a' && *p <= 'f' )
-        val = (FT_Byte)( *p - 'a' );
-      else if ( *p >= 'A' && *p <= 'F' )
-        val = (FT_Byte)( *p - 'A' + 10 );
-      else if ( *p == ' '  ||
-                *p == '\t' ||
-                *p == '\r' ||
-                *p == '\n' ||
-                *p == '\f' ||
-                *p == '\0' )
-      {
-        p++;
-        continue;
-      }
-      else if ( *p == '>' )
-      {
-        val  = 0;
-        done = 1;
-      }
-      else
-      {
-        error = CID_Err_Syntax_Error;
-        goto Exit;
-      }
-
-      if ( upper_nibble )
-        *d = (FT_Byte)( val << 4 );
-      else
-      {
-        *d = (FT_Byte)( *d + val );
-        d++;
-      }
-
-      upper_nibble = (FT_Byte)( 1 - upper_nibble );
-
-      if ( done )
-        break;
-
-      p++;
-    }
-
-    error = CID_Err_Ok;
-
-  Exit:
-    return error;
-  }
-
-
-  FT_LOCAL_DEF( FT_Error )
-  cid_face_open( CID_Face  face,
-                 FT_Int    face_index )
-  {
-    CID_Loader   loader;
-    CID_Parser*  parser;
-    FT_Memory    memory = face->root.memory;
-    FT_Error     error;
-
-
-    t1_init_loader( &loader, face );
-
-    parser = &loader.parser;
-    error = cid_parser_new( parser, face->root.stream, face->root.memory,
-                            (PSAux_Service)face->psaux );
-    if ( error )
-      goto Exit;
-
-    error = cid_parse_dict( face, &loader,
-                            parser->postscript,
-                            parser->postscript_len );
-    if ( error )
-      goto Exit;
-
-    if ( face_index < 0 )
-      goto Exit;
-
-    if ( FT_NEW( face->cid_stream ) )
-      goto Exit;
-
-    if ( parser->binary_length )
-    {
-      /* we must convert the data section from hexadecimal to binary */
-      if ( FT_ALLOC( face->binary_data, parser->binary_length )         ||
-           cid_hex_to_binary( face->binary_data, parser->binary_length,
-                              parser->data_offset, face )               )
-        goto Exit;
-
-      FT_Stream_OpenMemory( face->cid_stream,
-                            face->binary_data, parser->binary_length );
-      face->cid.data_offset = 0;
-    }
-    else
-    {
-      *face->cid_stream     = *face->root.stream;
-      face->cid.data_offset = loader.parser.data_offset;
-    }
-
-    error = cid_read_subrs( face );
-
-  Exit:
-    t1_done_loader( &loader );
-    return error;
-  }
-
-
-/* END */