cffdecode.c File Reference

#include <freetype/freetype.h>
#include <freetype/internal/ftdebug.h>
#include <freetype/internal/ftserv.h>
#include <freetype/internal/services/svcfftl.h>
#include "cffdecode.h"
#include "psobjs.h"
#include "psauxerr.h"

Include dependency graph for cffdecode.c:

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

Go to the source code of this file.

Macros
#define	FT_COMPONENT   cffdecode

Functions
static FT_Int	cff_compute_bias (FT_Int in_charstring_type, FT_UInt num_subrs)
	cff_lookup_glyph_by_stdcharcode (CFF_Font cff, FT_Int charcode)
	cff_decoder_init (CFF_Decoder *decoder, TT_Face face, CFF_Size size, CFF_GlyphSlot slot, FT_Bool hinting, FT_Render_Mode hint_mode, CFF_Decoder_Get_Glyph_Callback get_callback, CFF_Decoder_Free_Glyph_Callback free_callback)
	cff_decoder_prepare (CFF_Decoder *decoder, CFF_Size size, FT_UInt glyph_index)

Macro Definition Documentation

FT_COMPONENT

#define FT_COMPONENT   cffdecode

Definition at line 37 of file cffdecode.c.

Function Documentation

cff_compute_bias()

static FT_Int cff_compute_bias ( FT_Int  in_charstring_type, FT_UInt  num_subrs  )

static

Definition at line 401 of file cffdecode.c.

  {
    FT_Int  result;
 
 
    if ( in_charstring_type == 1 )
      result = 0;
    else if ( num_subrs < 1240 )
      result = 107;
    else if ( num_subrs < 33900U )
      result = 1131;
    else
      result = 32768U;
 
    return result;
  }

Referenced by cff_decoder_init(), and cff_decoder_prepare().

cff_decoder_init()

cff_decoder_init	(	CFF_Decoder *	decoder,
		TT_Face	face,
		CFF_Size	size,
		CFF_GlyphSlot	slot,
		FT_Bool	hinting,
		FT_Render_Mode	hint_mode,
		CFF_Decoder_Get_Glyph_Callback	get_callback,
		CFF_Decoder_Free_Glyph_Callback	free_callback
	)

Definition at line 2329 of file cffdecode.c.

  {
    CFF_Font  cff = (CFF_Font)face->extra.data;
 
 
    /* clear everything */
    FT_ZERO( decoder );
 
    /* initialize builder */
    cff_builder_init( &decoder->builder, face, size, slot, hinting );
 
    /* initialize Type2 decoder */
    decoder->cff          = cff;
    decoder->num_globals  = cff->global_subrs_index.count;
    decoder->globals      = cff->global_subrs;
    decoder->globals_bias = cff_compute_bias(
                              cff->top_font.font_dict.charstring_type,
                              decoder->num_globals );
 
    decoder->hint_mode = hint_mode;
 
    decoder->get_glyph_callback  = get_callback;
    decoder->free_glyph_callback = free_callback;
  }

cff_decoder_prepare()

cff_decoder_prepare	(	CFF_Decoder *	decoder,
		CFF_Size	size,
		FT_UInt	glyph_index
	)

Definition at line 2365 of file cffdecode.c.

  {
    CFF_Builder  *builder = &decoder->builder;
    CFF_Font      cff     = (CFF_Font)builder->face->extra.data;
    CFF_SubFont   sub     = &cff->top_font;
    FT_Error      error   = FT_Err_Ok;
 
    FT_Service_CFFLoad  cffload = (FT_Service_CFFLoad)cff->cffload;
 
 
    /* manage CID fonts */
    if ( cff->num_subfonts )
    {
      FT_Byte  fd_index = cffload->fd_select_get( &cff->fd_select,
                                                  glyph_index );
 
 
      if ( fd_index >= cff->num_subfonts )
      {
        FT_TRACE4(( "cff_decoder_prepare: invalid CID subfont index\n" ));
        error = FT_THROW( Invalid_File_Format );
        goto Exit;
      }
 
      FT_TRACE3(( "  in subfont %d:\n", fd_index ));
 
      sub = cff->subfonts[fd_index];
 
      if ( builder->hints_funcs && size )
      {
        FT_Size       ftsize   = FT_SIZE( size );
        CFF_Internal  internal = (CFF_Internal)ftsize->internal->module_data;
 
 
        /* for CFFs without subfonts, this value has already been set */
        builder->hints_globals = (void *)internal->subfonts[fd_index];
      }
    }
 
    decoder->num_locals  = sub->local_subrs_index.count;
    decoder->locals      = sub->local_subrs;
    decoder->locals_bias = cff_compute_bias(
                             decoder->cff->top_font.font_dict.charstring_type,
                             decoder->num_locals );
 
    decoder->glyph_width   = sub->private_dict.default_width;
    decoder->nominal_width = sub->private_dict.nominal_width;
 
    decoder->current_subfont = sub;
 
  Exit:
    return error;
  }

cff_lookup_glyph_by_stdcharcode()

cff_lookup_glyph_by_stdcharcode	(	CFF_Font	cff,
		FT_Int	charcode
	)

Definition at line 421 of file cffdecode.c.

  {
    FT_UInt    n;
    FT_UShort  glyph_sid;
 
    FT_Service_CFFLoad  cffload;
 
 
    /* CID-keyed fonts don't have glyph names */
    if ( !cff->charset.sids )
      return -1;
 
    /* check range of standard char code */
    if ( charcode < 0 || charcode > 255 )
      return -1;
 
#if 0
    /* retrieve cffload from list of current modules */
    FT_Service_CFFLoad  cffload;
 
 
    FT_FACE_FIND_GLOBAL_SERVICE( face, cffload, CFF_LOAD );
    if ( !cffload )
    {
      FT_ERROR(( "cff_lookup_glyph_by_stdcharcode:"
                 " the `cffload' module is not available\n" ));
      return FT_THROW( Unimplemented_Feature );
    }
#endif
 
    cffload = (FT_Service_CFFLoad)cff->cffload;
 
    /* Get code to SID mapping from `cff_standard_encoding'. */
    glyph_sid = cffload->get_standard_encoding( (FT_UInt)charcode );
 
    for ( n = 0; n < cff->num_glyphs; n++ )
    {
      if ( cff->charset.sids[n] == glyph_sid )
        return (FT_Int)n;
    }
 
    return -1;
  }

Referenced by cf2_getSeacComponent().