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

/*                                                                         */

/*  cffgload.h                                                             */

/*                                                                         */

/*    OpenType Glyph Loader (specification).                               */

/*                                                                         */

/*  Copyright 1996-2001, 2002, 2003, 2004, 2006, 2007, 2008, 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.                                        */

/*                                                                         */

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





#ifndef __CFFGLOAD_H__

#define __CFFGLOAD_H__





#include <ft2build.h>

#include FT_FREETYPE_H

#include "cffobjs.h"





FT_BEGIN_HEADER





#define CFF_MAX_OPERANDS        48

#define CFF_MAX_SUBRS_CALLS     32

#define CFF_MAX_TRANS_ELEMENTS  32





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

  /*                                                                       */

  /* <Structure>                                                           */

  /*    CFF_Builder                                                        */

  /*                                                                       */

  /* <Description>                                                         */

  /*     A structure used during glyph loading to store its outline.       */

  /*                                                                       */

  /* <Fields>                                                              */

  /*    memory        :: The current memory object.                        */

  /*                                                                       */

  /*    face          :: The current face object.                          */

  /*                                                                       */

  /*    glyph         :: The current glyph slot.                           */

  /*                                                                       */

  /*    loader        :: The current glyph loader.                         */

  /*                                                                       */

  /*    base          :: The base glyph outline.                           */

  /*                                                                       */

  /*    current       :: The current glyph outline.                        */

  /*                                                                       */

  /*    pos_x         :: The horizontal translation (if composite glyph).  */

  /*                                                                       */

  /*    pos_y         :: The vertical translation (if composite glyph).    */

  /*                                                                       */

  /*    left_bearing  :: The left side bearing point.                      */

  /*                                                                       */

  /*    advance       :: The horizontal advance vector.                    */

  /*                                                                       */

  /*    bbox          :: Unused.                                           */

  /*                                                                       */

  /*    path_begun    :: A flag which indicates that a new path has begun. */

  /*                                                                       */

  /*    load_points   :: If this flag is not set, no points are loaded.    */

  /*                                                                       */

  /*    no_recurse    :: Set but not used.                                 */

  /*                                                                       */

  /*    metrics_only  :: A boolean indicating that we only want to compute */

  /*                     the metrics of a given glyph, not load all of its */

  /*                     points.                                           */

  /*                                                                       */

  /*    hints_funcs   :: Auxiliary pointer for hinting.                    */

  /*                                                                       */

  /*    hints_globals :: Auxiliary pointer for hinting.                    */

  /*                                                                       */

  typedef struct  CFF_Builder_

  {

    FT_Memory       memory;

    TT_Face         face;

    CFF_GlyphSlot   glyph;

    FT_GlyphLoader  loader;

    FT_Outline*     base;

    FT_Outline*     current;



    FT_Pos          pos_x;

    FT_Pos          pos_y;



    FT_Vector       left_bearing;

    FT_Vector       advance;



    FT_BBox         bbox;          /* bounding box */

    FT_Bool         path_begun;

    FT_Bool         load_points;

    FT_Bool         no_recurse;



    FT_Bool         metrics_only;



    void*           hints_funcs;    /* hinter-specific */

    void*           hints_globals;  /* hinter-specific */



  } CFF_Builder;





  /* execution context charstring zone */



  typedef struct  CFF_Decoder_Zone_

  {

    FT_Byte*  base;

    FT_Byte*  limit;

    FT_Byte*  cursor;



  } CFF_Decoder_Zone;





  typedef struct  CFF_Decoder_

  {

    CFF_Builder        builder;

    CFF_Font           cff;



    FT_Fixed           stack[CFF_MAX_OPERANDS + 1];

    FT_Fixed*          top;



    CFF_Decoder_Zone   zones[CFF_MAX_SUBRS_CALLS + 1];

    CFF_Decoder_Zone*  zone;



    FT_Int             flex_state;

    FT_Int             num_flex_vectors;

    FT_Vector          flex_vectors[7];



    FT_Pos             glyph_width;

    FT_Pos             nominal_width;



    FT_Bool            read_width;

    FT_Bool            width_only;

    FT_Int             num_hints;

    FT_Fixed           buildchar[CFF_MAX_TRANS_ELEMENTS];



    FT_UInt            num_locals;

    FT_UInt            num_globals;



    FT_Int             locals_bias;

    FT_Int             globals_bias;



    FT_Byte**          locals;

    FT_Byte**          globals;



    FT_Byte**          glyph_names;   /* for pure CFF fonts only  */

    FT_UInt            num_glyphs;    /* number of glyphs in font */



    FT_Render_Mode     hint_mode;



    FT_Bool            seac;



  } CFF_Decoder;





  FT_LOCAL( void )

  cff_decoder_init( CFF_Decoder*    decoder,

                    TT_Face         face,

                    CFF_Size        size,

                    CFF_GlyphSlot   slot,

                    FT_Bool         hinting,

                    FT_Render_Mode  hint_mode );



  FT_LOCAL( FT_Error )

  cff_decoder_prepare( CFF_Decoder*  decoder,

                       CFF_Size      size,

                       FT_UInt       glyph_index );



#if 0  /* unused until we support pure CFF fonts */



  /* Compute the maximum advance width of a font through quick parsing */

  FT_LOCAL( FT_Error )

  cff_compute_max_advance( TT_Face  face,

                           FT_Int*  max_advance );



#endif /* 0 */



  FT_LOCAL( FT_Error )

  cff_decoder_parse_charstrings( CFF_Decoder*  decoder,

                                 FT_Byte*      charstring_base,

                                 FT_ULong      charstring_len );



  FT_LOCAL( FT_Error )

  cff_slot_load( CFF_GlyphSlot  glyph,

                 CFF_Size       size,

                 FT_UInt        glyph_index,

                 FT_Int32       load_flags );





FT_END_HEADER



#endif /* __CFFGLOAD_H__ */





/* END */

