cffload.h File Reference

#include <ft2build.h>
#include "cffparse.h"

Include dependency graph for cffload.h:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Functions
FT_BEGIN_HEADER	cff_get_standard_encoding (FT_UInt charcode)
	cff_index_get_string (CFF_Font font, FT_UInt element)
	cff_index_get_sid_string (CFF_Font font, FT_UInt sid)
	cff_index_access_element (CFF_Index idx, FT_UInt element, FT_Byte **pbytes, FT_ULong *pbyte_len)
	cff_index_forget_element (CFF_Index idx, FT_Byte **pbytes)
	cff_index_get_name (CFF_Font font, FT_UInt element)
	cff_charset_cid_to_gindex (CFF_Charset charset, FT_UInt cid)
	cff_font_load (FT_Library library, FT_Stream stream, FT_Int face_index, CFF_Font font, CFF_Face face, FT_Bool pure_cff, FT_Bool cff2)
	cff_font_done (CFF_Font font)
	cff_load_private_dict (CFF_Font font, CFF_SubFont subfont, FT_UInt lenNDV, FT_Fixed *NDV)
	cff_fd_select_get (CFF_FDSelect fdselect, FT_UInt glyph_index)
	cff_blend_check_vector (CFF_Blend blend, FT_UInt vsindex, FT_UInt lenNDV, FT_Fixed *NDV)
	cff_blend_build_vector (CFF_Blend blend, FT_UInt vsindex, FT_UInt lenNDV, FT_Fixed *NDV)
	cff_blend_clear (CFF_SubFont subFont)
	cff_blend_doBlend (CFF_SubFont subfont, CFF_Parser parser, FT_UInt numBlends)

Function Documentation

cff_blend_build_vector()

cff_blend_build_vector	(	CFF_Blend	blend,
		FT_UInt	vsindex,
		FT_UInt	lenNDV,
		FT_Fixed *	NDV
	)

Definition at line 1387 of file cffload.c.

  {
    FT_Error   error  = FT_Err_Ok;            /* for FT_REALLOC */
    FT_Memory  memory = blend->font->memory;  /* for FT_REALLOC */

    FT_UInt       len;
    CFF_VStore    vs;
    CFF_VarData*  varData;
    FT_UInt       master;


    FT_ASSERT( lenNDV == 0 || NDV );

    blend->builtBV = FALSE;

    vs = &blend->font->vstore;

    /* VStore and fvar must be consistent */
    if ( lenNDV != 0 && lenNDV != vs->axisCount )
    {
      FT_TRACE4(( " cff_blend_build_vector: Axis count mismatch\n" ));
      error = FT_THROW( Invalid_File_Format );
      goto Exit;
    }

    if ( vsindex >= vs->dataCount )
    {
      FT_TRACE4(( " cff_blend_build_vector: vsindex out of range\n" ));
      error = FT_THROW( Invalid_File_Format );
      goto Exit;
    }

    /* select the item variation data structure */
    varData = &vs->varData[vsindex];

    /* prepare buffer for the blend vector */
    len = varData->regionIdxCount + 1;    /* add 1 for default component */
    if ( FT_REALLOC( blend->BV,
                     blend->lenBV * sizeof( *blend->BV ),
                     len * sizeof( *blend->BV ) ) )
      goto Exit;

    blend->lenBV = len;

    /* outer loop steps through master designs to be blended */
    for ( master = 0; master < len; master++ )
    {
      FT_UInt         j;
      FT_UInt         idx;
      CFF_VarRegion*  varRegion;


      /* default factor is always one */
      if ( master == 0 )
      {
        blend->BV[master] = FT_FIXED_ONE;
        FT_TRACE4(( "   build blend vector len %d\n"
                    "   [ %f ",
                    len,
                    blend->BV[master] / 65536.0 ));
        continue;
      }

      /* VStore array does not include default master, so subtract one */
      idx       = varData->regionIndices[master - 1];
      varRegion = &vs->varRegionList[idx];

      if ( idx >= vs->regionCount )
      {
        FT_TRACE4(( " cff_blend_build_vector:"
                    " region index out of range\n" ));
        error = FT_THROW( Invalid_File_Format );
        goto Exit;
      }

      /* Note: `lenNDV' could be zero.                              */
      /*       In that case, build default blend vector (1,0,0...). */
      if ( !lenNDV )
      {
        blend->BV[master] = 0;
        continue;
      }

      /* In the normal case, initialize each component to 1 */
      /* before inner loop.                                 */
      blend->BV[master] = FT_FIXED_ONE; /* default */

      /* inner loop steps through axes in this region */
      for ( j = 0; j < lenNDV; j++ )
      {
        CFF_AxisCoords*  axis = &varRegion->axisList[j];
        FT_Fixed         axisScalar;


        /* compute the scalar contribution of this axis; */
        /* ignore invalid ranges                         */
        if ( axis->startCoord > axis->peakCoord ||
             axis->peakCoord > axis->endCoord   )
          axisScalar = FT_FIXED_ONE;

        else if ( axis->startCoord < 0 &&
                  axis->endCoord > 0   &&
                  axis->peakCoord != 0 )
          axisScalar = FT_FIXED_ONE;

        /* peak of 0 means ignore this axis */
        else if ( axis->peakCoord == 0 )
          axisScalar = FT_FIXED_ONE;

        /* ignore this region if coords are out of range */
        else if ( NDV[j] < axis->startCoord ||
                  NDV[j] > axis->endCoord   )
          axisScalar = 0;

        /* calculate a proportional factor */
        else
        {
          if ( NDV[j] == axis->peakCoord )
            axisScalar = FT_FIXED_ONE;
          else if ( NDV[j] < axis->peakCoord )
            axisScalar = FT_DivFix( NDV[j] - axis->startCoord,
                                    axis->peakCoord - axis->startCoord );
          else
            axisScalar = FT_DivFix( axis->endCoord - NDV[j],
                                    axis->endCoord - axis->peakCoord );
        }

        /* take product of all the axis scalars */
        blend->BV[master] = FT_MulFix( blend->BV[master], axisScalar );
      }

      FT_TRACE4(( ", %f ",
                  blend->BV[master] / 65536.0 ));
    }

    FT_TRACE4(( "]\n" ));

    /* record the parameters used to build the blend vector */
    blend->lastVsindex = vsindex;

    if ( lenNDV != 0 )
    {
      /* user has set a normalized vector */
      if ( FT_REALLOC( blend->lastNDV,
                       blend->lenNDV * sizeof ( *NDV ),
                       lenNDV * sizeof ( *NDV ) ) )
        goto Exit;

      FT_MEM_COPY( blend->lastNDV,
                   NDV,
                   lenNDV * sizeof ( *NDV ) );
    }

    blend->lenNDV  = lenNDV;
    blend->builtBV = TRUE;

  Exit:
    return error;
  }

Referenced by cff_parse_blend().

cff_blend_check_vector()

cff_blend_check_vector	(	CFF_Blend	blend,
		FT_UInt	vsindex,
		FT_UInt	lenNDV,
		FT_Fixed *	NDV
	)

Definition at line 1554 of file cffload.c.

  {
    if ( !blend->builtBV                                ||
         blend->lastVsindex != vsindex                  ||
         blend->lenNDV != lenNDV                        ||
         ( lenNDV                                     &&
           ft_memcmp( NDV,
                      blend->lastNDV,
                      lenNDV * sizeof ( *NDV ) ) != 0 ) )
    {
      /* need to build blend vector */
      return TRUE;
    }

    return FALSE;
  }

Referenced by cff_parse_blend().

cff_blend_clear()

cff_blend_clear

(

CFF_SubFont

subFont

)

Definition at line 1262 of file cffload.c.

  {
    subFont->blend_top  = subFont->blend_stack;
    subFont->blend_used = 0;
  }

Referenced by cff_load_private_dict().

cff_blend_doBlend()

cff_blend_doBlend	(	CFF_SubFont	subfont,
		CFF_Parser	parser,
		FT_UInt	numBlends
	)

Definition at line 1280 of file cffload.c.

  {
    FT_UInt  delta;
    FT_UInt  base;
    FT_UInt  i, j;
    FT_UInt  size;

    CFF_Blend  blend = &subFont->blend;

    FT_Memory  memory = subFont->blend.font->memory; /* for FT_REALLOC */
    FT_Error   error  = FT_Err_Ok;                   /* for FT_REALLOC */

    /* compute expected number of operands for this blend */
    FT_UInt  numOperands = (FT_UInt)( numBlends * blend->lenBV );
    FT_UInt  count       = (FT_UInt)( parser->top - 1 - parser->stack );


    if ( numOperands > count )
    {
      FT_TRACE4(( " cff_blend_doBlend: Stack underflow %d argument%s\n",
                  count,
                  count == 1 ? "" : "s" ));

      error = FT_THROW( Stack_Underflow );
      goto Exit;
    }

    /* check whether we have room for `numBlends' values at `blend_top' */
    size = 5 * numBlends;           /* add 5 bytes per entry    */
    if ( subFont->blend_used + size > subFont->blend_alloc )
    {
      FT_Byte*  blend_stack_old = subFont->blend_stack;
      FT_Byte*  blend_top_old   = subFont->blend_top;


      /* increase or allocate `blend_stack' and reset `blend_top'; */
      /* prepare to append `numBlends' values to the buffer        */
      if ( FT_REALLOC( subFont->blend_stack,
                       subFont->blend_alloc,
                       subFont->blend_alloc + size ) )
        goto Exit;

      subFont->blend_top    = subFont->blend_stack + subFont->blend_used;
      subFont->blend_alloc += size;

      /* iterate over the parser stack and adjust pointers */
      /* if the reallocated buffer has a different address */
      if ( blend_stack_old                         &&
           subFont->blend_stack != blend_stack_old )
      {
        FT_PtrDist  offset = subFont->blend_stack - blend_stack_old;
        FT_Byte**   p;


        for ( p = parser->stack; p < parser->top; p++ )
        {
          if ( *p >= blend_stack_old && *p < blend_top_old )
            *p += offset;
        }
      }
    }
    subFont->blend_used += size;

    base  = count - numOperands;     /* index of first blend arg */
    delta = base + numBlends;        /* index of first delta arg */

    for ( i = 0; i < numBlends; i++ )
    {
      const FT_Int32*  weight = &blend->BV[1];
      FT_UInt32        sum;


      /* convert inputs to 16.16 fixed point */
      sum = cff_parse_num( parser, &parser->stack[i + base] ) * 0x10000;

      for ( j = 1; j < blend->lenBV; j++ )
        sum += cff_parse_num( parser, &parser->stack[delta++] ) * *weight++;

      /* point parser stack to new value on blend_stack */
      parser->stack[i + base] = subFont->blend_top;

      /* Push blended result as Type 2 5-byte fixed point number.  This */
      /* will not conflict with actual DICTs because 255 is a reserved  */
      /* opcode in both CFF and CFF2 DICTs.  See `cff_parse_num' for    */
      /* decode of this, which rounds to an integer.                    */
      *subFont->blend_top++ = 255;
      *subFont->blend_top++ = (FT_Byte)( sum >> 24 );
      *subFont->blend_top++ = (FT_Byte)( sum >> 16 );
      *subFont->blend_top++ = (FT_Byte)( sum >>  8 );
      *subFont->blend_top++ = (FT_Byte)sum;
    }

    /* leave only numBlends results on parser stack */
    parser->top = &parser->stack[base + numBlends];

  Exit:
    return error;
  }

Referenced by cff_parse_blend().

cff_charset_cid_to_gindex()

cff_charset_cid_to_gindex	(	CFF_Charset	charset,
		FT_UInt	cid
	)

Definition at line 864 of file cffload.c.

  {
    FT_UInt  result = 0;


    if ( cid <= charset->max_cid )
      result = charset->cids[cid];

    return result;
  }

Referenced by cff_encoding_load(), and cff_slot_load().

cff_fd_select_get()

cff_fd_select_get	(	CFF_FDSelect	fdselect,
		FT_UInt	glyph_index
	)

Definition at line 750 of file cffload.c.

  {
    FT_Byte  fd = 0;


    /* if there is no FDSelect, return zero               */
    /* Note: CFF2 with just one Font Dict has no FDSelect */
    if ( !fdselect->data )
      goto Exit;

    switch ( fdselect->format )
    {
    case 0:
      fd = fdselect->data[glyph_index];
      break;

    case 3:
      /* first, compare to the cache */
      if ( (FT_UInt)( glyph_index - fdselect->cache_first ) <
                        fdselect->cache_count )
      {
        fd = fdselect->cache_fd;
        break;
      }

      /* then, look up the ranges array */
      {
        FT_Byte*  p       = fdselect->data;
        FT_Byte*  p_limit = p + fdselect->data_size;
        FT_Byte   fd2;
        FT_UInt   first, limit;


        first = FT_NEXT_USHORT( p );
        do
        {
          if ( glyph_index < first )
            break;

          fd2   = *p++;
          limit = FT_NEXT_USHORT( p );

          if ( glyph_index < limit )
          {
            fd = fd2;

            /* update cache */
            fdselect->cache_first = first;
            fdselect->cache_count = limit - first;
            fdselect->cache_fd    = fd2;
            break;
          }
          first = limit;

        } while ( p < p_limit );
      }
      break;

    default:
      ;
    }

  Exit:
    return fd;
  }

Referenced by cff_slot_load().

cff_font_done()

cff_font_done

(

CFF_Font

font

)

Definition at line 2499 of file cffload.c.

  {
    FT_Memory  memory = font->memory;
    FT_UInt    idx;


    cff_index_done( &font->global_subrs_index );
    cff_index_done( &font->font_dict_index );
    cff_index_done( &font->name_index );
    cff_index_done( &font->charstrings_index );

    /* release font dictionaries, but only if working with */
    /* a CID keyed CFF font or a CFF2 font                 */
    if ( font->num_subfonts > 0 )
    {
      for ( idx = 0; idx < font->num_subfonts; idx++ )
        cff_subfont_done( memory, font->subfonts[idx] );

      /* the subfonts array has been allocated as a single block */
      FT_FREE( font->subfonts[0] );
    }

    cff_encoding_done( &font->encoding );
    cff_charset_done( &font->charset, font->stream );
    cff_vstore_done( &font->vstore, memory );

    cff_subfont_done( memory, &font->top_font );

    CFF_Done_FD_Select( &font->fd_select, font->stream );

    FT_FREE( font->font_info );

    FT_FREE( font->font_name );
    FT_FREE( font->global_subrs );
    FT_FREE( font->strings );
    FT_FREE( font->string_pool );

    if ( font->cf2_instance.finalizer )
    {
      font->cf2_instance.finalizer( font->cf2_instance.data );
      FT_FREE( font->cf2_instance.data );
    }

    FT_FREE( font->font_extra );
  }

Referenced by cff_face_done().

cff_font_load()

cff_font_load	(	FT_Library	library,
		FT_Stream	stream,
		FT_Int	face_index,
		CFF_Font	font,
		CFF_Face	face,
		FT_Bool	pure_cff,
		FT_Bool	cff2
	)

Definition at line 2151 of file cffload.c.

  {
    static const FT_Frame_Field  cff_header_fields[] =
    {
#undef  FT_STRUCTURE
#define FT_STRUCTURE  CFF_FontRec

      FT_FRAME_START( 3 ),
        FT_FRAME_BYTE( version_major ),
        FT_FRAME_BYTE( version_minor ),
        FT_FRAME_BYTE( header_size ),
      FT_FRAME_END
    };

    FT_Error         error;
    FT_Memory        memory = stream->memory;
    FT_ULong         base_offset;
    CFF_FontRecDict  dict;
    CFF_IndexRec     string_index;
    FT_UInt          subfont_index;


    FT_ZERO( font );
    FT_ZERO( &string_index );

    dict        = &font->top_font.font_dict;
    base_offset = FT_STREAM_POS();

    font->library     = library;
    font->stream      = stream;
    font->memory      = memory;
    font->cff2        = cff2;
    font->base_offset = base_offset;

    /* read CFF font header */
    if ( FT_STREAM_READ_FIELDS( cff_header_fields, font ) )
      goto Exit;

    if ( cff2 )
    {
      if ( font->version_major != 2 ||
           font->header_size < 5    )
      {
        FT_TRACE2(( "  not a CFF2 font header\n" ));
        error = FT_THROW( Unknown_File_Format );
        goto Exit;
      }

      if ( FT_READ_USHORT( font->top_dict_length ) )
        goto Exit;
    }
    else
    {
      FT_Byte  absolute_offset;


      if ( FT_READ_BYTE( absolute_offset ) )
        goto Exit;

      if ( font->version_major != 1 ||
           font->header_size < 4    ||
           absolute_offset > 4      )
      {
        FT_TRACE2(( "  not a CFF font header\n" ));
        error = FT_THROW( Unknown_File_Format );
        goto Exit;
      }
    }

    /* skip the rest of the header */
    if ( FT_STREAM_SEEK( base_offset + font->header_size ) )
    {
      /* For pure CFFs we have read only four bytes so far.  Contrary to */
      /* other formats like SFNT those bytes doesn't define a signature; */
      /* it is thus possible that the font isn't a CFF at all.           */
      if ( pure_cff )
      {
        FT_TRACE2(( "  not a CFF file\n" ));
        error = FT_THROW( Unknown_File_Format );
      }
      goto Exit;
    }

    if ( cff2 )
    {
      /* For CFF2, the top dict data immediately follow the header    */
      /* and the length is stored in the header `offSize' field;      */
      /* there is no index for it.                                    */
      /*                                                              */
      /* Use the `font_dict_index' to save the current position       */
      /* and length of data, but leave count at zero as an indicator. */
      FT_ZERO( &font->font_dict_index );

      font->font_dict_index.data_offset = FT_STREAM_POS();
      font->font_dict_index.data_size   = font->top_dict_length;

      /* skip the top dict data for now, we will parse it later */
      if ( FT_STREAM_SKIP( font->top_dict_length ) )
        goto Exit;

      /* next, read the global subrs index */
      if ( FT_SET_ERROR( cff_index_init( &font->global_subrs_index,
                                         stream, 1, cff2 ) ) )
        goto Exit;
    }
    else
    {
      /* for CFF, read the name, top dict, string and global subrs index */
      if ( FT_SET_ERROR( cff_index_init( &font->name_index,
                                         stream, 0, cff2 ) ) )
      {
        if ( pure_cff )
        {
          FT_TRACE2(( "  not a CFF file\n" ));
          error = FT_THROW( Unknown_File_Format );
        }
        goto Exit;
      }

      /* if we have an empty font name,      */
      /* it must be the only font in the CFF */
      if ( font->name_index.count > 1                          &&
           font->name_index.data_size < font->name_index.count )
      {
        /* for pure CFFs, we still haven't checked enough bytes */
        /* to be sure that it is a CFF at all                   */
        error = pure_cff ? FT_THROW( Unknown_File_Format )
                         : FT_THROW( Invalid_File_Format );
        goto Exit;
      }

      if ( FT_SET_ERROR( cff_index_init( &font->font_dict_index,
                                         stream, 0, cff2 ) )                 ||
           FT_SET_ERROR( cff_index_init( &string_index,
                                         stream, 1, cff2 ) )                 ||
           FT_SET_ERROR( cff_index_init( &font->global_subrs_index,
                                         stream, 1, cff2 ) )                 ||
           FT_SET_ERROR( cff_index_get_pointers( &string_index,
                                                 &font->strings,
                                                 &font->string_pool,
                                                 &font->string_pool_size ) ) )
        goto Exit;

      /* there must be a Top DICT index entry for each name index entry */
      if ( font->name_index.count > font->font_dict_index.count )
      {
        FT_ERROR(( "cff_font_load:"
                   " not enough entries in Top DICT index\n" ));
        error = FT_THROW( Invalid_File_Format );
        goto Exit;
      }
    }

    font->num_strings = string_index.count;

    if ( pure_cff )
    {
      /* well, we don't really forget the `disabled' fonts... */
      subfont_index = (FT_UInt)( face_index & 0xFFFF );

      if ( face_index > 0 && subfont_index >= font->name_index.count )
      {
        FT_ERROR(( "cff_font_load:"
                   " invalid subfont index for pure CFF font (%d)\n",
                   subfont_index ));
        error = FT_THROW( Invalid_Argument );
        goto Exit;
      }

      font->num_faces = font->name_index.count;
    }
    else
    {
      subfont_index = 0;

      if ( font->name_index.count > 1 )
      {
        FT_ERROR(( "cff_font_load:"
                   " invalid CFF font with multiple subfonts\n"
                   "              "
                   " in SFNT wrapper\n" ));
        error = FT_THROW( Invalid_File_Format );
        goto Exit;
      }
    }

    /* in case of a font format check, simply exit now */
    if ( face_index < 0 )
      goto Exit;

    /* now, parse the top-level font dictionary */
    FT_TRACE4(( "parsing top-level\n" ));
    error = cff_subfont_load( &font->top_font,
                              &font->font_dict_index,
                              subfont_index,
                              stream,
                              base_offset,
                              cff2 ? CFF2_CODE_TOPDICT : CFF_CODE_TOPDICT,
                              font,
                              face );
    if ( error )
      goto Exit;

    if ( FT_STREAM_SEEK( base_offset + dict->charstrings_offset ) )
      goto Exit;

    error = cff_index_init( &font->charstrings_index, stream, 0, cff2 );
    if ( error )
      goto Exit;

    /* now, check for a CID or CFF2 font */
    if ( dict->cid_registry != 0xFFFFU ||
         cff2                          )
    {
      CFF_IndexRec  fd_index;
      CFF_SubFont   sub = NULL;
      FT_UInt       idx;


      /* for CFF2, read the Variation Store if available;                 */
      /* this must follow the Top DICT parse and precede any Private DICT */
      error = cff_vstore_load( &font->vstore,
                               stream,
                               base_offset,
                               dict->vstore_offset );
      if ( error )
        goto Exit;

      /* this is a CID-keyed font, we must now allocate a table of */
      /* sub-fonts, then load each of them separately              */
      if ( FT_STREAM_SEEK( base_offset + dict->cid_fd_array_offset ) )
        goto Exit;

      error = cff_index_init( &fd_index, stream, 0, cff2 );
      if ( error )
        goto Exit;

      /* Font Dicts are not limited to 256 for CFF2. */
      /* TODO: support this for CFF2                 */
      if ( fd_index.count > CFF_MAX_CID_FONTS )
      {
        FT_TRACE0(( "cff_font_load: FD array too large in CID font\n" ));
        goto Fail_CID;
      }

      /* allocate & read each font dict independently */
      font->num_subfonts = fd_index.count;
      if ( FT_NEW_ARRAY( sub, fd_index.count ) )
        goto Fail_CID;

      /* set up pointer table */
      for ( idx = 0; idx < fd_index.count; idx++ )
        font->subfonts[idx] = sub + idx;

      /* now load each subfont independently */
      for ( idx = 0; idx < fd_index.count; idx++ )
      {
        sub = font->subfonts[idx];
        FT_TRACE4(( "parsing subfont %u\n", idx ));
        error = cff_subfont_load( sub,
                                  &fd_index,
                                  idx,
                                  stream,
                                  base_offset,
                                  cff2 ? CFF2_CODE_FONTDICT
                                       : CFF_CODE_TOPDICT,
                                  font,
                                  face );
        if ( error )
          goto Fail_CID;
      }

      /* now load the FD Select array;               */
      /* CFF2 omits FDSelect if there is only one FD */
      if ( !cff2 || fd_index.count > 1 )
        error = CFF_Load_FD_Select( &font->fd_select,
                                    font->charstrings_index.count,
                                    stream,
                                    base_offset + dict->cid_fd_select_offset );

    Fail_CID:
      cff_index_done( &fd_index );

      if ( error )
        goto Exit;
    }
    else
      font->num_subfonts = 0;

    /* read the charstrings index now */
    if ( dict->charstrings_offset == 0 )
    {
      FT_ERROR(( "cff_font_load: no charstrings offset\n" ));
      error = FT_THROW( Invalid_File_Format );
      goto Exit;
    }

    font->num_glyphs = font->charstrings_index.count;

    error = cff_index_get_pointers( &font->global_subrs_index,
                                    &font->global_subrs, NULL, NULL );

    if ( error )
      goto Exit;

    /* read the Charset and Encoding tables if available */
    if ( !cff2 && font->num_glyphs > 0 )
    {
      FT_Bool  invert = FT_BOOL( dict->cid_registry != 0xFFFFU && pure_cff );


      error = cff_charset_load( &font->charset, font->num_glyphs, stream,
                                base_offset, dict->charset_offset, invert );
      if ( error )
        goto Exit;

      /* CID-keyed CFFs don't have an encoding */
      if ( dict->cid_registry == 0xFFFFU )
      {
        error = cff_encoding_load( &font->encoding,
                                   &font->charset,
                                   font->num_glyphs,
                                   stream,
                                   base_offset,
                                   dict->encoding_offset );
        if ( error )
          goto Exit;
      }
    }

    /* get the font name (/CIDFontName for CID-keyed fonts, */
    /* /FontName otherwise)                                 */
    font->font_name = cff_index_get_name( font, subfont_index );

  Exit:
    cff_index_done( &string_index );

    return error;
  }

Referenced by cff_face_init().

cff_get_standard_encoding()

FT_BEGIN_HEADER cff_get_standard_encoding

(

FT_UInt

charcode

)

Definition at line 192 of file cffload.c.

  {
    return (FT_UShort)( charcode < 256 ? cff_standard_encoding[charcode]
                                       : 0 );
  }

cff_index_access_element()

cff_index_access_element	(	CFF_Index	idx,
		FT_UInt	element,
		FT_Byte **	pbytes,
		FT_ULong *	pbyte_len
	)

Definition at line 498 of file cffload.c.

  {
    FT_Error  error = FT_Err_Ok;


    if ( idx && idx->count > element )
    {
      /* compute start and end offsets */
      FT_Stream  stream = idx->stream;
      FT_ULong   off1, off2 = 0;


      /* load offsets from file or the offset table */
      if ( !idx->offsets )
      {
        FT_ULong  pos = element * idx->off_size;


        if ( FT_STREAM_SEEK( idx->start + idx->hdr_size + pos ) )
          goto Exit;

        off1 = cff_index_read_offset( idx, &error );
        if ( error )
          goto Exit;

        if ( off1 != 0 )
        {
          do
          {
            element++;
            off2 = cff_index_read_offset( idx, &error );

          } while ( off2 == 0 && element < idx->count );
        }
      }
      else   /* use offsets table */
      {
        off1 = idx->offsets[element];
        if ( off1 )
        {
          do
          {
            element++;
            off2 = idx->offsets[element];

          } while ( off2 == 0 && element < idx->count );
        }
      }

      /* XXX: should check off2 does not exceed the end of this entry; */
      /*      at present, only truncate off2 at the end of this stream */
      if ( off2 > stream->size + 1                    ||
           idx->data_offset > stream->size - off2 + 1 )
      {
        FT_ERROR(( "cff_index_access_element:"
                   " offset to next entry (%d)"
                   " exceeds the end of stream (%d)\n",
                   off2, stream->size - idx->data_offset + 1 ));
        off2 = stream->size - idx->data_offset + 1;
      }

      /* access element */
      if ( off1 && off2 > off1 )
      {
        *pbyte_len = off2 - off1;

        if ( idx->bytes )
        {
          /* this index was completely loaded in memory, that's easy */
          *pbytes = idx->bytes + off1 - 1;
        }
        else
        {
          /* this index is still on disk/file, access it through a frame */
          if ( FT_STREAM_SEEK( idx->data_offset + off1 - 1 ) ||
               FT_FRAME_EXTRACT( off2 - off1, *pbytes )      )
            goto Exit;
        }
      }
      else
      {
        /* empty index element */
        *pbytes    = 0;
        *pbyte_len = 0;
      }
    }
    else
      error = FT_THROW( Invalid_Argument );

  Exit:
    return error;
  }

Referenced by cff_get_glyph_data(), cff_index_get_name(), and cff_subfont_load().

cff_index_forget_element()

cff_index_forget_element	(	CFF_Index	idx,
		FT_Byte **	pbytes
	)

Definition at line 596 of file cffload.c.

  {
    if ( idx->bytes == 0 )
    {
      FT_Stream  stream = idx->stream;


      FT_FRAME_RELEASE( *pbytes );
    }
  }

Referenced by cff_free_glyph_data(), cff_index_get_name(), and cff_subfont_load().

cff_index_get_name()

cff_index_get_name	(	CFF_Font	font,
		FT_UInt	element
	)

Definition at line 611 of file cffload.c.

  {
    CFF_Index   idx = &font->name_index;
    FT_Memory   memory;
    FT_Byte*    bytes;
    FT_ULong    byte_len;
    FT_Error    error;
    FT_String*  name = 0;


    if ( !idx->stream )  /* CFF2 does not include a name index */
      goto Exit;

    memory = idx->stream->memory;

    error = cff_index_access_element( idx, element, &bytes, &byte_len );
    if ( error )
      goto Exit;

    if ( !FT_ALLOC( name, byte_len + 1 ) )
    {
      if ( byte_len )
        FT_MEM_COPY( name, bytes, byte_len );
      name[byte_len] = 0;
    }
    cff_index_forget_element( idx, &bytes );

  Exit:
    return name;
  }

Referenced by cff_face_init(), and cff_font_load().

cff_index_get_sid_string()

cff_index_get_sid_string	(	CFF_Font	font,
		FT_UInt	sid
	)

Definition at line 656 of file cffload.c.

  {
    /* value 0xFFFFU indicates a missing dictionary entry */
    if ( sid == 0xFFFFU )
      return NULL;

    /* if it is not a standard string, return it */
    if ( sid > 390 )
      return cff_index_get_string( font, sid - 391 );

    /* CID-keyed CFF fonts don't have glyph names */
    if ( !font->psnames )
      return NULL;

    /* this is a standard string */
    return (FT_String *)font->psnames->adobe_std_strings( sid );
  }

cff_index_get_string()

cff_index_get_string	(	CFF_Font	font,
		FT_UInt	element
	)

Definition at line 646 of file cffload.c.

  {
    return ( element < font->num_strings )
             ? (FT_String*)font->strings[element]
             : NULL;
  }

Referenced by cff_get_name_index(), and cff_index_get_sid_string().

cff_load_private_dict()

cff_load_private_dict	(	CFF_Font	font,
		CFF_SubFont	subfont,
		FT_UInt	lenNDV,
		FT_Fixed *	NDV
	)

Definition at line 1865 of file cffload.c.

  {
    FT_Error         error  = FT_Err_Ok;
    CFF_ParserRec    parser;
    CFF_FontRecDict  top    = &subfont->font_dict;
    CFF_Private      priv   = &subfont->private_dict;
    FT_Stream        stream = font->stream;
    FT_UInt          stackSize;


    /* store handle needed to access memory, vstore for blend;    */
    /* we need this for clean-up even if there is no private DICT */
    subfont->blend.font   = font;
    subfont->blend.usedBV = FALSE;  /* clear state */

    if ( !top->private_offset || !top->private_size )
      goto Exit2;       /* no private DICT, do nothing */

    /* set defaults */
    FT_ZERO( priv );

    priv->blue_shift       = 7;
    priv->blue_fuzz        = 1;
    priv->lenIV            = -1;
    priv->expansion_factor = (FT_Fixed)( 0.06 * 0x10000L );
    priv->blue_scale       = (FT_Fixed)( 0.039625 * 0x10000L * 1000 );

    /* provide inputs for blend calculations */
    priv->subfont   = subfont;
    subfont->lenNDV = lenNDV;
    subfont->NDV    = NDV;

    /* add 1 for the operator */
    stackSize = font->cff2 ? font->top_font.font_dict.maxstack + 1
                           : CFF_MAX_STACK_DEPTH + 1;

    if ( cff_parser_init( &parser,
                          font->cff2 ? CFF2_CODE_PRIVATE : CFF_CODE_PRIVATE,
                          priv,
                          font->library,
                          stackSize,
                          top->num_designs,
                          top->num_axes ) )
      goto Exit;

    if ( FT_STREAM_SEEK( font->base_offset + top->private_offset ) ||
         FT_FRAME_ENTER( top->private_size )                       )
      goto Exit;

    FT_TRACE4(( " private dictionary:\n" ));
    error = cff_parser_run( &parser,
                            (FT_Byte*)stream->cursor,
                            (FT_Byte*)stream->limit );
    FT_FRAME_EXIT();

    if ( error )
      goto Exit;

    /* ensure that `num_blue_values' is even */
    priv->num_blue_values &= ~1;

    /* sanitize `initialRandomSeed' to be a positive value, if necessary;  */
    /* this is not mandated by the specification but by our implementation */
    if ( priv->initial_random_seed < 0 )
      priv->initial_random_seed = -priv->initial_random_seed;
    else if ( priv->initial_random_seed == 0 )
      priv->initial_random_seed = 987654321;

  Exit:
    /* clean up */
    cff_blend_clear( subfont ); /* clear blend stack */
    cff_parser_done( &parser ); /* free parser stack */

  Exit2:
    /* no clean up (parser not initialized) */
    return error;
  }

Referenced by cff_subfont_load().